Display device
阅读说明:本技术 显示设备 (Display device ) 是由 余新 郭祖强 顾佳琦 李屹 于 2018-08-16 设计创作,主要内容包括:一种显示设备包括光源装置、第一空间光调制器、第二空间光调制器、第一光回收装置及第二光回收装置,光源装置用来发出第一颜色光、第二颜色荧光、第二颜色补充光、第三颜色荧光及第三颜色补充光;第一空间光调制器用于调制第一颜色光产生第一颜色图像光及调制第二颜色荧光与第二颜色补充光产生第二颜色图像光及非投影光;第二空间光调制器调制第三颜色荧光及第三颜色补充光产生第三颜色图像光及非投影光,第一光回收装置将第一空间光调制器产生的非投影光中的第一颜色光与第二颜色补充光回收至第一空间光调制器再次利用;第二光回收装置将第二空间光调制器产生的非投影光中的第三颜色补充光回收至第二空间光调制器再次利用。(A display device includes a light source device, a first spatial light modulator, a second spatial light modulator, a first light recovery device, and a second light recovery device, the light source device being configured to emit a first color light, a second color fluorescence, a second color complementary light, a third color fluorescence, and a third color complementary light; the first spatial light modulator is used for modulating the first color light to generate first color image light and modulating the second color fluorescence and the second color supplement light to generate second color image light and non-projection light; the first light recovery device recovers the first color light and the second color supplement light in the non-projection light generated by the first spatial light modulator to the first spatial light modulator for reuse; the second light recovery device recovers the third color supplement light in the non-projection light generated by the second spatial light modulator to the second spatial light modulator for reuse.)
1. A display device characterized in that the display device comprises light source means, a first spatial light modulator, a second spatial light modulator, first light recycling means and second light recycling means,
the light source device is used for emitting first color light, second color fluorescence, second color supplement light, third color fluorescence and third color supplement light;
the first spatial light modulator is used for receiving the first color light, the second color fluorescent light and the second color supplement light emitted by the light source device, modulating the first color light to generate a first color image light and modulating the second color fluorescent light and the second color supplement light to generate a second color image light and non-projection light;
the second spatial light modulator is used for receiving third color supplementary light and third color fluorescent light emitted by the light source device, modulating the third color fluorescent light and the third color supplementary light to generate third color image light and non-projection light, and synthesizing the first color image light emitted by the first spatial light modulator, the second color image light and the third color image light emitted by the second spatial light modulator to display an image;
the first light recycling device is used for recycling the first color light and the second color supplement light in the non-projection light generated by the first spatial light modulator to the first spatial light modulator for reuse;
the second light recycling device is used for recycling the third color supplement light in the non-projection light generated by the second spatial light modulator to the second spatial light modulator for reuse.
2. The display device of claim 1, wherein the first light recycling means comprises a first switched absorber for absorbing or blocking the second color fluorescence in the non-image light, the second color supplemental light in the non-image light being recycled by the first light recycling means to the first spatial light modulator for reuse.
3. The display device according to claim 2, wherein the first light recycling device includes a first polarization combining element and a first polarization conversion element, the first polarization combining element is configured to guide the first color light, the second color fluorescent light and the second color complementary light in the first polarization state emitted by the light source device to the first spatial light modulator, the first polarization conversion element is configured to convert the polarization states of the first color light in the first color non-image light and the second color complementary light in the second color non-image light into the second polarization state, the first color light in the first color non-image light and the second color complementary light in the second color non-image light in the second polarization state are guided to the first polarization combining element, and the first polarization combining element is further configured to guide the first color light in the first color non-image light and the second color complementary light in the second color non-image light in the second polarization state The charged light is directed to the first spatial light modulator for modulation again.
4. The display device of claim 3, wherein the second light recycling means comprises a second switched absorber for absorbing or blocking third color fluorescence in the third color non-image light, and third color supplemental light in the third color non-image light is recycled by the second light recycling means to the second spatial light modulator for reuse.
5. The display device of claim 4, wherein the first switched absorber comprises a narrow band filter; the second switched absorber includes a narrow band filter.
6. The display device according to claim 4, wherein the second light recycling device includes a second polarization combining element and a second polarization conversion element, the second polarization combining element is configured to guide the third color fluorescent light and the third color complementary light in one polarization state to the second spatial light modulator, the second polarization conversion element is configured to convert the polarization state of the third color complementary light in the third color non-image light into another polarization state, the third color complementary light in the third color non-image light in the another polarization state is guided to the second polarization combining element, and the second polarization combining element also guides the third color complementary light in the third color non-image light in the another polarization state to the second spatial light modulator for modulation again.
7. The display device according to claim 6, wherein the light source device includes a wavelength conversion system, a light splitting device, a first complementary light source, a first light combining element, and a first polarization conversion device, the wavelength conversion system includes an excitation light source and a wavelength conversion element, the excitation light source is configured to emit excitation light, the wavelength conversion element is configured to convert a portion of the excitation light into the second color fluorescence and the third color fluorescence, the wavelength conversion system provides the second color fluorescence and the third color fluorescence converted by the wavelength conversion element to the first light combining element, and provides another portion of the excitation light as the first color light to the first light combining element, the first complementary light source is configured to emit the second color complementary light to the first light combining element, and the first light combining element is configured to combine the first color light with the first color light, The second color fluorescence, the third color fluorescence and the second color complementary light are combined and then provided to the light splitting device, and the light splitting device is used for guiding the first color light, the second color fluorescence and the second color complementary light to the first spatial light modulator and guiding the third color fluorescence to the second spatial light modulator; the first polarization conversion device is located between the first light combining element and the first spatial light modulator, and is configured to convert the first color light, the second color fluorescence and the second color supplementary light emitted by the light splitting device into the first color light, the second color fluorescence and the second color supplementary light in a first polarization state.
8. The display device according to claim 7, wherein the light source device further includes a second supplementary light source, a second light combining element, and a second polarization conversion device, the second light combining element is located on an optical path between the light splitting device and the second spatial light modulator, the light splitting device is configured to emit the third color fluorescent light to the second light combining element, the second supplementary light source is configured to emit the third color supplementary light to the second light combining element, and the second light combining element is configured to combine the third color fluorescent light and the third color supplementary light and provide the combined light to the second spatial light modulator; the second polarization conversion device is located between the second light combining element and the second spatial light modulator, and is configured to convert the third color supplementary light emitted by the second light combining element into the third color supplementary light in the first polarization state.
9. The display device according to claim 1, wherein the display device comprises an image combining device, the image combining device comprises a light combining device and a lens assembly, the light combining device is configured to combine the first color image light and the second color image light emitted by the first spatial light modulator and the third color image light emitted by the second spatial light modulator, and the lens assembly is configured to project the first color image light, the second color image light and the third color image light emitted by the light combining device to display an image.
10. The display device of claim 1, wherein the first color light, the second color supplemental light, and the third color supplemental light are laser light; the first color is blue, the second color is one of green and red, and the third color is the other of green and red.
Technical Field
The invention relates to the technical field of display, in particular to a display device.
Background
The color gamut generally refers to the spectrum locus of visible light that can be seen by human eyes in nature, and the area of the region formed by the visible spectrum locus is the maximum color gamut area that can be seen by human eyes. At present, R, G, B three-primary-color display devices are adopted by display devices such as projectors and displays which are composed of different display devices to reproduce images in a color-restoring manner. In a given chromaticity space, such as CIE1931xy chromaticity space, the triangle formed by the R, G, B three primary colors of a display device is called the color gamut which can be displayed by the device, and the larger the color gamut space area is, the more vivid and vivid the color picture is, however, how to make the display device realize the display of wider color gamut is an important technical subject in the industry.
Light sources of display devices such as laser projectors are generally classified into three major categories, one of which is to excite phosphors of different colors by short-wavelength laser to generate primary colors of red, green and blue. Another type directly utilizes red, green and blue lasers as the three primary color light sources. The third is the combination of the first two, and a general blue laser light source is used as an excitation light source with short wavelength to excite the fluorescent powder to generate red-green primary color light and also used as blue primary color light. Each of these three different implementation techniques has advantages and disadvantages. For the scheme of exciting the fluorescent powder or mixing the laser fluorescence by the laser, because the semiconductor blue laser with the gallium nitride substrate has the characteristics of high efficiency, long service life and stable work, the scheme of exciting the fluorescent powder color wheel by the blue semiconductor laser has the characteristics of long service life, high efficiency, stable equipment and low cost. But the color gamut of this solution is relatively small due to the broad spectrum of phosphor-excited fluorescence (Laser phosphor). Generally, a display device using the technology can cover the complete sRGB color gamut, and the color gamut can be enhanced to reach the DCI-P3 color gamut by some enhancement processing, such as adding a narrow-band optical filter to remove the yellow light spectrum in the green light and the red light. But the narrow-band filtering loses considerable luminance of the light, so that the efficiency of the display device is greatly reduced. A display device using pure RGB lasers has a very wide color gamut because RGB lasers have very good monochromaticity. A display device (e.g., a projection system) using RGB laser can easily meet the rec.2020 color gamut standard, and please refer to fig. 1 for a comparison of the color gamuts of the display devices.
However, RGB laser display devices (such as projectors) also have a number of disadvantages. The first is speckle. Speckle is caused by the coherence of laser light, and the light reflected on a display plane interferes due to a phase difference caused by the fluctuation of the plane, resulting in uneven brightness distribution on the display screen. Although there have been many inventions that attempt to solve the problem of laser speckle, none are ideal. Secondly, the cost of the RGB laser display device is high. This is because the red and green lasers in RGB laser display devices are not mature under the current technology. The efficiency of semiconductor green laser can only be below 20%, which is far lower than blue laser of gallium nitride substrate and red laser of ternary substrate, and the cost is very high. While the red laser has almost the same efficiency as the blue laser, the red laser has poor temperature stability, and not only the efficiency is significantly reduced with the increase of temperature, but also the center wavelength is shifted. The two points make the RGB laser display device have color cast along with temperature change. This requires a thermostat for the red laser to stabilize the operating state of the red laser, which means a powerful cooling device is required to ensure the operating temperature of the red laser to be stable, thereby greatly increasing the cost of the RGB laser display device.
In view of the above, the present invention proposes to combine the laser fluorescence and the complementary light such as RGB laser, so as to effectively exert the advantages of both and make up for the respective disadvantages. A small amount of red and green laser is added into the laser fluorescence system to serve as supplement light, so that the color gamut range of the projection system can be effectively expanded. And due to the addition of fluorescence, the speckle effect of supplementary light such as pure laser can be greatly weakened. Although speckle cannot be completely eliminated, the addition of fluorescence greatly reduces the contrast of speckle from being perceived by the human eye. Because the red and green excitation supplement light with high power is not needed, compared with an RGB laser light source, the red and green excitation supplement light does not need a complex heat dissipation system, and the cost of the system is greatly reduced.
Further, it is also an important issue how to recycle the non-image light generated by the display device to improve the light utilization rate and the brightness of the image. Existing display devices, such as projection devices, typically employ spatial light modulators for image modulation, which may generate non-image light during the image modulation process, which the present invention contemplates recycling. In particular, a DMD (Digital micromirror Device) spatial Light modulator using DLP (Digital Light processing) projection technology is increasingly widely used due to its advantages of high contrast, long Device lifetime, high fill factor, etc. In the DLP projection technology, three colors of light (R (red), G (green), and B (blue) (or more colors such as R (red), G (green), B (blue), and W (white)) emitted from a light source in time series are projected onto a DMD chip, and the DMD chip receives a control signal from a DLP control system and then reflects the light of different colors onto a projection screen to form an image.
The DMD chip is composed of hundreds of thousands or even millions of micromirrors, and one micromirror corresponds to one pixel. The rotating device is arranged below each micromirror, the micromirrors can be turned between an ON state and an OFF state under the control of a digital driving signal output by a DLP control system, and the turning speed of the micromirrors can reach thousands of times per second.
As shown in fig. 2, fig. 2 is a schematic diagram of an optical path of a DMD chip using DLP projection technology to modulate an image, where the DMD chip includes a plurality of
In the image modulation process, the
In view of the above, a basic light recycling system design of a one-chip spatial light modulator is shown in fig. 3. Specifically, the display apparatus shown in fig. 3 includes a
However, the above two designs also have respective disadvantages, such as the first one is not directed to the display device of the existing two-piece type spatial light modulator, and the second one has a limitation on the type of the spatial light modulator, which needs to be improved.
Disclosure of Invention
In view of the above, the present invention provides a display device that can improve at least one of the above technical problems.
A display apparatus includes a light source device, a first spatial light modulator, a second spatial light modulator, a first light recovery device, and a second light recovery device, the light source device being configured to emit a first color light, a second color fluorescence, a second color complementary light, a third color fluorescence, and a third color complementary light; the first spatial light modulator is used for receiving the first color light, the second color fluorescent light and the second color supplement light emitted by the light source device, modulating the first color light to generate a first color image light and modulating the second color fluorescent light and the second color supplement light to generate a second color image light and non-projection light; the second spatial light modulator is used for receiving third color supplementary light and third color fluorescent light emitted by the light source device, modulating the third color fluorescent light and the third color supplementary light to generate third color image light and non-projection light, and synthesizing the first color image light emitted by the first spatial light modulator, the second color image light and the third color image light emitted by the second spatial light modulator to display an image; the first light recycling device is used for recycling the first color light and the second color supplement light in the non-projection light generated by the first spatial light modulator to the first spatial light modulator for reuse; the second light recycling device is used for recycling the third color supplement light in the non-projection light generated by the second spatial light modulator to the second spatial light modulator for reuse.
Compared with the prior art, in the display device, the color gamut of the second color fluorescence can be widened by the second and third color supplementary lights, so that the color gamut of the display device is wider and the display effect is better. In addition, the second and third color supplementary lights can also increase the brightness of the display device, thereby achieving high-brightness image display. In addition, the first light recovery device and the second light recovery device are used for recovering the second color supplement light and the third color supplement light in the non-projection light to the first spatial light modulator and the second spatial light modulator for reuse, so that the cost is saved, the brightness of the second color supplement light and the brightness of the third color supplement light of the picture are enhanced, and the brightness of the second color supplement light and the brightness of the third color supplement light of each pixel of the picture are improved.
Drawings
Fig. 1 is a comparison diagram of the gamut ranges of several display devices using different light sources.
Fig. 2 is a schematic diagram of the optical path principle of a DMD chip modulated image using DLP projection technology.
Fig. 3 is a schematic diagram of the structure and optical path principle of a basic light recycling system of a one-chip spatial light modulator.
Fig. 4 is a schematic diagram of the structure and light path principle of another light recycling system based on a dual-optical spatial modulator.
FIG. 5 is a block diagram of a display device according to a preferred embodiment of the present invention.
Fig. 6 is a schematic diagram of the image modulation principle of the display device of fig. 5.
Fig. 7 is a schematic view of a structure of a wavelength conversion system of the display device shown in fig. 5.
Fig. 8 is a schematic diagram of the gamut range of the display device shown in fig. 5.
Fig. 9-11 are timing diagrams of systems employed by the
FIG. 12 is a schematic illustration of the technical gamut and color volume expansion of the display device shown in FIG. 5.
Description of the main elements
First spatial
Second spatial
First supplemental
First
First
Second supplemental
Second
Second
First
Second
First switching
First
First polarization
Second polarization
Second
Light combining
Color gamut ranges F1, F2, F3
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
In view of the above, the present invention provides a display device for improving at least one of the above-mentioned technical problems, and specifically, the display device includes a light source device, a first spatial light modulator, a second spatial light modulator, a first light recycling device and a second light recycling device, wherein the light source device is configured to emit a first color light, a second color fluorescent light, a second color complementary light, a third color fluorescent light and a third color complementary light; the first spatial light modulator is used for receiving the first color light, the second color fluorescent light and the second color supplement light emitted by the light source device, modulating the first color light to generate a first color image light and modulating the second color fluorescent light and the second color supplement light to generate a second color image light and non-projection light; the second spatial light modulator is used for receiving third color supplementary light and third color fluorescent light emitted by the light source device, modulating the third color fluorescent light and the third color supplementary light to generate third color image light and non-projection light, and synthesizing the first color image light emitted by the first spatial light modulator, the second color image light and the third color image light emitted by the second spatial light modulator to display an image; the first light recycling device is used for recycling the first color light and the second color supplement light in the non-projection light generated by the first spatial light modulator to the first spatial light modulator for reuse; the second light recycling device is used for recycling the third color supplement light in the non-projection light generated by the second spatial light modulator to the second spatial light modulator for reuse.
Compared with the prior art, in the display device, the color gamut of the second color fluorescence can be widened by the second and third color supplementary lights, so that the color gamut of the display device is wider and the display effect is better. In addition, the second and third color supplementary lights can also increase the brightness of the display device, thereby achieving high-brightness image display. In addition, the first light recovery device and the second light recovery device are used for recovering the second color supplement light and the third color supplement light in the non-projection light to the first spatial light modulator and the second spatial light modulator for reuse, so that the cost is saved, the brightness of the second color supplement light and the brightness of the third color supplement light of the picture are enhanced, and the brightness of the second color supplement light and the brightness of the third color supplement light of each pixel of the picture are improved.
Referring to fig. 5 and fig. 6, fig. 5 is a block diagram of a
Specifically, the
The first spatial
The first spatial
The second spatial
In this embodiment, the
The
The
The first supplemental
The first
The
The first
The second supplemental
The second
The second
Further, the first spatial
The first
According to the foregoing, the first color light, the second color fluorescent light and the second color supplementary light all have the first polarization state through the first
Specifically, the second spatial
The second
Specifically, the third color fluorescent light and the third color complementary light may both have one polarization state (e.g., one of the first polarization state and the second polarization state), the third color fluorescent light and the third color complementary light are both guided to the second spatial
The
In the present embodiment, the first color is blue, the second color is green, and the third color is red, but in a modified embodiment, the second color may be red, and the third color may be green.
It is understood that, as mentioned above, the first color light, the second color fluorescence and the third color fluorescence are respectively blue laser light, green fluorescence and red fluorescence, and the gamut range that the three can jointly exhibit is the first gamut range F1, i.e. the gamut range that the light emitted by the
The first and second spatial
Specifically, when the color gamut of the image data of one image to be displayed is within the first color gamut F1, the
When the color gamut of the original image data of an image to be displayed falls on (or is outside) the boundary line of the second color gamut F2, the light source device may be controlled to emit the first color light, the second color supplement light, and the third color supplement light, and the first and second spatial
When the color gamut of the original image data of one image to be displayed falls between the first color gamut F1 and the second color gamut F2 (excluding the boundary line between the two color gamut), the
In summary, when the color gamut of the original image data of an image to be displayed falls outside the first color gamut F1 (e.g., on the boundary of the second color gamut F2 and outside, between the first color gamut F1 and the second color gamut F2), the corrected image data may include a first corrected image signal b corresponding to the first color light, a second corrected image signal g corresponding to the second color fluorescence, a third corrected image signal gl corresponding to the second color complementary light, a fourth corrected image signal r corresponding to the third color fluorescence, and a fifth corrected image signal rl corresponding to the third color complementary light. The first, the second,The third, fourth and fifth corrected image signals are based on the first color original signal B0Second color original signal G0And a third color original signal R0Is obtained by calculation according to the original signal R0、G0、B0The calculated tristimulus values of the pixels are equal to the tristimulus values of the pixels calculated from the first, second, third, fourth and fifth corrected image signals r, g, b, rl, gl of the pixels. Wherein the original signal R is determined according to each pixel0、G0、B0When calculating the corrected image signals r, g, b, rl, gl, rl is taken2+gl2Minimum r, g, b, rl, gl data values.
The system timing employed by the
Referring to fig. 9, fig. 9 is a timing diagram of a first system adopted by the
Further, as shown in fig. 9, in the first period T1, the second color non-image light generated by the first spatial light modulator 120 is provided to the first switch absorber 161, the first switch absorber 161 emits a second color supplement light of the second color non-image light, the second color supplement light has a first polarization state, the second color supplement light emitted by the first switch absorber 161 is transmitted to the first polarization conversion element 162 through the first relay element 165, the first guiding element, the first relay element 166, the first polarization conversion element 162 converts the second color supplement light into a second color supplement light of a second polarization state, the second color supplement light of the second polarization state is transmitted to the first polarization combination element 163 by the first polarization conversion element 162, and the second color supplement light recovered by the first light recovery device 160 by the first polarization combination element 163 is reflected to the first switch absorber 161 The first spatial light modulator 120, the first spatial light modulator 120 can further modulate the second color supplement light according to the image signal (such as the corrected image signal gl) to generate a second color image light, the second color image light is guided to the image synthesis device 150 for further generating a second color image; the third color non-image light generated by the second spatial light modulator 130 is provided to the second switch-type absorber 171, the second switch-type absorber 171 emits a third color supplement light of the third color non-image light, the third color supplement light has a polarization state (such as a first polarization state), the third color supplement light emitted by the second switch-type absorber 171 is transmitted to the second polarization conversion element 172 through the second relay element 175, the second guiding element 174 and the second relay element 176, the second polarization conversion element 172 converts the third color supplement light into a third color supplement light of another polarization state (such as a second polarization state), the third color supplement light of the another polarization state is transmitted to the second polarization combination element 173 by the second polarization conversion element 172, and the third color supplement light recovered by the second light recovery device 170 of the second polarization combination element 173 is reflected to the second space absorber 171 The inter-light modulator 130, the second spatial light modulator 120 may further modulate the third color supplement light according to image signals (such as the corrected image signals rl and r) to generate a third color image light and provide the third color image light to the image synthesis device 150 for further generating a third color image.
As shown in fig. 9, during a second time period T2 of the modulation period T of one frame image, the excitation light source 111a emits a first color light (i.e., blue laser light), the wavelength conversion element 111b emits a second color fluorescence (i.e., green fluorescence), so that the wavelength conversion system 111 emits the second color fluorescence to the first light combining element 113, the first supplemental light source 112 emits a second color supplemental light (i.e., the green laser light) to the first light combining element 113, the first light combining element 113 reflects the second color fluorescence to the relay lens 101 and transmits the second color supplemental light to the light splitting device 140, the light splitting device 140 guides (e.g., transmits) the second color fluorescence and the second color supplemental light to the relay lens 101, the relay lens 101 transmits the second color fluorescence and the second color supplemental light to the first polarization conversion device 114, the first polarization conversion device 114 converts the second color fluorescence and the second color complementary light into a second color fluorescence and a second color complementary light with a first polarization state, the first polarization combining element 163 receives the second color fluorescence and the second color complementary light with the first polarization state emitted by the first polarization conversion device 114 and transmits the second color fluorescence and the second color complementary light with the first polarization state to the first spatial light modulator 120, the first spatial light modulator 120 modulates the second color fluorescence and the second color complementary light according to an image signal (such as an image signal g and a correction image signal gl) to generate a second color image light and a second color non-image light, the first spatial light modulator 120 further provides the second color image light to the image synthesis device 150, the image synthesis device 150 is configured to generate a second color image, the second supplementary light source 115 emits a third color supplementary light (i.e. red laser light) to the second light combining element 116, the second light combining element 116 transmits the third color supplementary light to the second polarization conversion device 117 via the relay lens 102, the second polarization conversion device 117 converts the third color supplementary light into light with one polarization state (either the first polarization state or the second polarization state, in this embodiment, the light is mainly converted into the light with the first polarization state), the second light combining element 116 receives the third color supplementary light with the polarization state and guides (e.g. transmits) the third color supplementary light with the polarization state to the second spatial light modulator 130, the second spatial light modulator 130 modulates the third color supplementary light with the polarization state according to an image signal (e.g. a correction image signal rl) to generate a third color image light and a third color non-image light, the third color image light is reflected to the image synthesis device 150, the light combination device 151 of the image synthesis device 150 receives the second color image light and the third color image light, combines the second color image light and the third color image light, and provides the combined light to the lens assembly 152, and the lens assembly projects the second color image light and the third color image light to generate a second color image and a third color image.
Further, as shown in fig. 9, in the second period T2, the second color non-image light generated by the first spatial light modulator 120 is provided to the first switch absorber 161, the first switch absorber 161 absorbs the second color fluorescence and emits second color supplement light of the second color non-image light, the second color supplement light has a first polarization state, the second color supplement light emitted by the first switch absorber 161 is provided to the first polarization conversion element 162 via the first relay element 165, the first guide element, the first relay element 166, the first polarization conversion element 162 converts the second color supplement light into second color supplement light of a second polarization state, the second color supplement light of the second polarization state is transmitted to the first polarization combination element 163 by the first polarization conversion element 162, the first polarization combining element 163 and the second color supplement light recycled by the first light recycling device 160 are reflected to the first spatial light modulator 120, and the first spatial light modulator 120 can further modulate the second color supplement light according to the image signal (such as a corrected image signal gl) to generate a second color image light, which is sent to the image synthesizing device 150 for further generating a second color image; the third color non-image light generated by the second spatial light modulator 130 is provided to the second switch-type absorber 171, the second switch-type absorber 171 emits a third color supplement light of the third color non-image light, the third color supplement light has a polarization state (such as a first polarization state), the third color supplement light emitted by the second switch-type absorber 171 is transmitted to the second polarization conversion element 172 through the second relay element 175, the second guiding element 174 and the second relay element 176, the second polarization conversion element 172 converts the third color supplement light into a third color supplement light of another polarization state, the third color supplement light of the another polarization state (such as a second polarization state) is transmitted to the second polarization combination element 173 by the second polarization conversion element 172, and the third color supplement light recovered by the second light recovery device 170 of the second polarization combination element 173 is reflected to the second space absorber 171 The inter-light modulator 130, the second spatial light modulator 120 may further modulate the third color supplement light according to image signals (such as the corrected image signals rl and r) to generate a third color image light and provide the third color image light to the image synthesis device 150 for further generating a third color image.
As shown in fig. 9, in a third time period T3 of a modulation period T of one frame of image, the excitation light source 111a emits a first color light (i.e. blue laser light), the wavelength conversion element 111b emits a first color light to the first light combining element 113, the first supplemental light source 112 is turned off, the first light combining element 113 reflects the first color light to the relay lens 101, the relay lens 101 transmits the first color light to the first polarization conversion device 114, the first polarization conversion device 114 converts the first color light into a first color light having a first polarization state, the first polarization light combining element 163 receives the first color light having the first polarization state emitted by the first polarization conversion device 114 and transmits the first color light having the first polarization state to the first spatial light modulator 120, and the first spatial light modulator 120 modulates the first color light according to an image signal (e.g. image signal b) The first spatial light modulator 120 further provides the first color image light to the image synthesis device 150 for generating a first color image, the second supplemental light source 115 emits a third color supplemental light (i.e., red laser light) to the second light combining element 116, the second light combining element 116 reflects the third color supplemental light to the relay lens 102, the relay lens 102 transmits the third color supplemental light to the second polarization conversion device 117, the second polarization conversion device 117 converts the third color supplemental light into light having one polarization state (either the first polarization state or the second polarization state, which is mainly illustrated by the light converted into the first polarization state), and the second light combining element 116 receives the third color supplemental light having the polarization state (e.g., the first polarization state) and guides (e.g., transmits) the third color supplemental light having the polarization state (e.g., the first polarization state) To the second spatial light modulator 130, the second spatial light modulator 130 modulates the third color supplemental light with polarization state according to an image signal (e.g., a correction image signal rl) to generate a third color image light and a third color non-image light, the third color image light is reflected to the image combining device 150, the light combining device 151 of the image combining device 150 receives the first color image light and the third color image light to combine the first color image light and the third color image light and provide the combined light to the lens assembly 152, and the lens assembly projects the first color image light and the third color image light to generate a first color image and a third color image.
Further, as shown in fig. 9, in the third period T3, the first color non-image light generated by the first spatial light modulator 120 is provided to the first switch absorber 161, the first switch absorber 161 emits the first color non-image light having a first polarization state, the first color non-image light emitted by the first switch absorber 161 is transmitted to the first polarization conversion element 162 via the first relay element 165, the first guide element, the first relay element 166, the first polarization conversion element 162 converts the first color non-image light into first color non-image light of a second polarization state, the first color non-image light of the second polarization state is transmitted to the first polarization combining element 163 by the first polarization conversion element 162, and the first color non-image light recovered by the first light recovery device 160 by the first polarization combining element 163 is reflected to the first color non-image light A spatial light modulator 120, said first spatial light modulator 120 being further capable of modulating said first color non-image light in accordance with said image signal (e.g. correction image signal b) to generate first color image light, said first color image light being provided to said image combining means 150 for further generating a first color image; the third color non-image light generated by the second spatial light modulator 130 is provided to the second switch-type absorber 171, the second switch-type absorber 171 emits a third color supplement light of the third color non-image light, the third color supplement light has a polarization state (such as a first polarization state), the third color supplement light emitted by the second switch-type absorber 171 is transmitted to the second polarization conversion element 172 through the second relay element 175, the second guiding element 174 and the second relay element 176, the second polarization conversion element 172 converts the third color supplement light into a third color supplement light of another polarization state, the third color supplement light of the another polarization state (such as a second polarization state) is transmitted to the second polarization combination element 173 by the second polarization conversion element 172, and the third color supplement light recovered by the second light recovery device 170 of the second polarization combination element 173 is reflected to the second space absorber 171 The inter-light modulator 130, the second spatial light modulator 120 may further modulate the third color supplement light according to image signals (such as the corrected image signals rl and r) to generate a third color image light and provide the third color image light to the image synthesis device 150 for further generating a third color image.
Referring to fig. 10, fig. 10 is a timing diagram of a second system adopted by the
Further, as shown in fig. 10, in the first period T1, the second color non-image light generated by the first spatial light modulator 120 is provided to the first switch absorber 161, the first switch absorber 161 emits a second color supplement light of the second color non-image light, the second color supplement light has a first polarization state, the second color supplement light emitted by the first switch absorber 161 is transmitted to the first polarization conversion element 162 through the first relay element 165, the first guiding element, the first relay element 166, the first polarization conversion element 162 converts the second color supplement light into a second color supplement light of a second polarization state, the second color supplement light of the second polarization state is transmitted to the first polarization combination element 163 by the first polarization conversion element 162, and the second color supplement light recovered by the first light recovery device 160 by the first polarization combination element 163 is reflected to the first color supplement light The first spatial light modulator 120, the first spatial light modulator 120 can further modulate the second color supplement light according to the image signal (such as a corrected image signal gl) to generate a second color image light, and the second color supplement light is transmitted to the image synthesis device 150 for further generating a second color image; the third color non-image light (the third color fluorescent light) generated by the second spatial light modulator 130 is supplied to the second switching absorber 171, and the third color fluorescent light is absorbed by the second switching absorber 171, so that the second light recovery device 170 does not recover the third color light at this time in the first period T1.
As shown in fig. 10, in a second time period T2 of the modulation period T of one frame image, the excitation light source 111a emits a first color light (i.e., blue laser light), the wavelength conversion element 111b emits a second color fluorescence (i.e., green fluorescence), so that the wavelength conversion system 111 emits the second color fluorescence to the first light combining element 113, the first supplementary light source 112 is turned off, the first light combining element 113 reflects the second color fluorescence to the light splitting device 140, the light splitting device 140 guides (transmits) the second color fluorescence to the relay lens 101, the relay lens 101 transmits the second color fluorescence to the first polarization conversion device 114, the first polarization conversion device 114 converts the second color fluorescence into a second color fluorescence having a first polarization state, and the first polarization combining element 163 receives the second color fluorescence having the first polarization state emitted by the first polarization conversion device 114 And transmits the second color fluorescence with the first polarization state to the first spatial light modulator 120, the first spatial light modulator 120 modulates the second color fluorescence according to an image signal (e.g. an image signal g) to generate second color image light and second color non-image light, the first spatial light modulator 120 further provides the second color image light to the image synthesis device 150 for generating a second color image, the second supplemental light source 115 emits third color supplemental light (i.e. red laser light) to the second light combination element 116, the second light combination element 116 transmits the third color supplemental light to the second polarization conversion device 117 via the relay lens 102, the second polarization conversion device 117 converts the third color supplemental light into light with one polarization state (either the first polarization state or the second polarization state, which is mainly described in this embodiment as light converted into the first polarization state), the second light combining element 116 receives the third color complementary light with polarization state and directs (e.g. transmits) the third color complementary light with polarization state to the second spatial light modulator 130, the second spatial light modulator 130 modulates the third color supplement light with polarization state according to an image signal (such as a correction image signal rl) to generate a third color image light and a third color non-image light, the image light of the third color is reflected to the image combining device 150, the light combining device 151 of the image combining device 150 receives the image light of the second color and the image light of the third color to combine the image light of the second color and the image light of the third color and provide the combined light to the lens assembly 152, the lens assembly projects the second color image light and the third color image light to generate a second color image and a third color image.
Further, as shown in fig. 10, in the second period T2, the second color non-image light (which is second color fluorescence) generated by the first spatial light modulator 120 is supplied to the first switching absorber 161, and the first switching absorber 161 absorbs the second color fluorescence, and therefore, in the second period T2, the first light recovery device 160 does not perform recovery and utilization of the second color light; the third color non-image light generated by the second spatial light modulator 130 is provided to the second switch-type absorber 171, the second switch-type absorber 171 emits a third color supplement light of the third color non-image light, the third color supplement light has a polarization state (such as a first polarization state), the third color supplement light emitted by the second switch-type absorber 171 is transmitted to the second polarization conversion element 172 through the second relay element 175, the second guiding element 174 and the second relay element 176, the second polarization conversion element 172 converts the third color supplement light into a third color supplement light of another polarization state, the third color supplement light of the another polarization state (such as a second polarization state) is transmitted to the second polarization combination element 173 by the second polarization conversion element 172, and the third color supplement light recovered by the second light recovery device 170 of the second polarization combination element 173 is reflected to the second space absorber 171 The inter-light modulator 130, the second spatial light modulator 120 may further modulate the third color supplement light according to image signals (such as the corrected image signals rl and r) to generate a third color image light and provide the third color image light to the image synthesis device 150 for further generating a third color image.
As shown in fig. 10, in a third time period T3 of the modulation period T of one frame image, the excitation light source 111a emits a first color light (i.e. blue laser light), the wavelength conversion element 111b emits a first color light to the first light combining element 113, the first supplemental light source 112 is turned off, the first light combining element 113 reflects the first color light to the light splitting device 140, the light splitting device 140 guides (e.g. transmits) the first color light to the relay lens 101, the relay lens 101 transmits the first color light to the first polarization conversion device 114, the first polarization conversion device 114 converts the first color light into a first color light having a first polarization state, the first polarization combining element 163 receives the first color light having the first polarization state emitted by the first polarization conversion device 114 and transmits the first color light having the first polarization state to the first spatial light modulator 120, the first spatial light modulator 120 modulates the first color light according to an image signal (e.g., an image signal b) to generate a first color image light and a first color non-image light, the first spatial light modulator 120 further provides the first color image light to the image synthesis device 150 for generating a first color image, the second supplemental light source 115 emits a third color supplemental light (i.e., red laser light) to the second light combining element 116, the second light combining element 116 reflects the third color supplemental light to the relay lens 102, the relay lens 102 transmits the third color supplemental light to the second polarization conversion device 117, the second polarization conversion device 117 converts the third color supplemental light into light having a polarization state (both the first polarization state and the second polarization state, which is mainly illustrated in this embodiment by light converted into the first polarization state), the second light combining element 116 receives the third color supplement light with polarization state (e.g. the first polarization state) and directs (e.g. transmits) the third color supplement light with polarization state to the second spatial light modulator 130, the second spatial light modulator 130 modulates the third color supplement light with polarization state according to an image signal (such as a correction image signal rl) to generate a third color image light and a third color non-image light, the image light of the third color is reflected to the image synthesis apparatus 150, the light combination apparatus 151 of the image synthesis apparatus 150 receives the image light of the first color and the image light of the third color to combine the image light of the first color and the image light of the third color and provide the combined light to the lens assembly 152, the lens component 152 projects the first color image light and the third color image light to generate a first color image and a third color image.
Further, as shown in fig. 10, in the third period T3, the first color non-image light generated by the first spatial light modulator 120 is provided to the first switch absorber 161, the first switch absorber 161 emits the first color non-image light having a first polarization state, the first color non-image light emitted by the first switch absorber 161 is transmitted to the first polarization conversion element 162 via the first relay element 165, the first guide element, the first relay element 166, the first polarization conversion element 162 converts the first color non-image light into first color non-image light of a second polarization state, the first color non-image light of the second polarization state is transmitted to the first polarization combining element 163 by the first polarization conversion element 162, and the first polarization combining element 163 reflects the first color non-image light recovered by the first light recovery device 160 to the first color non-image light A spatial light modulator 120, said first spatial light modulator 120 being further capable of modulating said first color non-image light in accordance with said image signal (e.g. correction image signal b) to generate first color image light, said first color image light being provided to said image combining means 150 for further generating a first color image; the third color non-image light generated by the second spatial light modulator 130 is provided to the second switch-type absorber 171, the second switch-type absorber 171 emits a third color supplement light of the third color non-image light, the third color supplement light has a polarization state (such as a first polarization state), the third color supplement light emitted by the second switch-type absorber 171 is transmitted to the second polarization conversion element 172 through the second relay element 175, the second guiding element 174 and the second relay element 176, the second polarization conversion element 172 converts the third color supplement light into a third color supplement light of another polarization state, the third color supplement light of the another polarization state (such as a second polarization state) is transmitted to the second polarization combination element 173 by the second polarization conversion element 172, and the third color supplement light recovered by the second light recovery device 170 of the second polarization combination element 173 is reflected to the second space absorber 171 The inter-light modulator 130, the second spatial light modulator 120 may further modulate the third color supplement light according to image signals (such as the corrected image signals rl and r) to generate a third color image light and provide the third color image light to the image synthesis device 150 for further generating a third color image.
Referring to fig. 11, fig. 11 is a timing diagram of a third system adopted by the display apparatus 100, in a first time period T1 of a modulation period T of one frame of image, the excitation light source 111a is turned off, so that the wavelength conversion system 111 is turned off, the first supplemental light source 112 emits second color supplemental light (i.e., the green laser light) to the first light combining element 113, the first light combining element 113 transmits the second color supplemental light to the relay lens 101 via the light splitting device 140, the relay lens 101 transmits the second color supplemental light to the first polarization conversion device 114, the first polarization conversion device 114 converts the second color supplemental light into second color supplemental light with a first polarization state, and the first polarization light combining element 163 receives the second color supplemental light with the first polarization state emitted by the first polarization conversion device 114 and transmits the second color supplemental light with the first polarization state to the first polarization device 114 A spatial light modulator 120, the first spatial light modulator 120 modulates the second color supplementary light according to an image signal (e.g. a corrected image signal gl) to generate a second color image light and a second color non-image light, the second color image light is guided (e.g. transmitted) to the image synthesizing device 150 for generating a second color image, the second supplementary light source 115 emits a third color supplementary light (i.e. red laser light) to the second light combining element 116, the second light combining element 116 combines the third color supplementary light, the third color supplementary light is transmitted to the second polarization conversion device 117 via the relay lens 102, the second polarization conversion device 117 converts the third color supplementary light into light with a polarization state (either a first polarization state or a second polarization state, which is mainly illustrated in this embodiment by light converted into the first polarization state), the second light combining element 116 receives the third color complementary light with polarization state and directs (e.g. transmits) the third color complementary light with polarization state to the second spatial light modulator 130, the second spatial light modulator 130 modulates the third color supplement light with polarization state according to an image signal (such as a correction image signal rl) to generate a third color image light and a third color non-image light, the image light of the third color is reflected to the image combining device 150, the light combining device 151 of the image combining device 150 receives the image light of the second color and the image light of the third color to combine the image light of the second color and the image light of the third color and provide the combined light to the lens assembly 152, the lens assembly projects the second color image light and the third color image light to generate a second color image and a third color image.
Further, as shown in fig. 11, in the first period T1, the second color non-image light generated by the first spatial light modulator 120 is provided to the first switch absorber 161, the first switch absorber 161 emits a second color supplement light of the second color non-image light, the second color supplement light has a first polarization state, the second color supplement light emitted by the first switch absorber 161 is transmitted to the first polarization conversion element 162 through the first relay element 165, the first guiding element, the first relay element 166, the first polarization conversion element 162 converts the second color supplement light into a second color supplement light of a second polarization state, the second color supplement light of the second polarization state is transmitted to the first polarization combination element 163 by the first polarization conversion element 162, and the second color supplement light recovered by the first light recovery device 160 by the first polarization combination element 163 is reflected to the first color supplement light The first spatial light modulator 120, the first spatial light modulator 120 can further modulate the second color supplement light according to the image signal (such as the corrected image signal gl) to generate a second color image light, the second color image light is guided to the image synthesis device 150 for further generating a second color image; the third color non-image light generated by the second spatial light modulator 130 is provided to the second switch-type absorber 171, the second switch-type absorber 171 emits a third color supplement light of the third color non-image light, the third color supplement light has a polarization state (such as a first polarization state), the third color supplement light emitted by the second switch-type absorber 171 is transmitted to the second polarization conversion element 172 through the second relay element 175, the second guiding element 174 and the second relay element 176, the second polarization conversion element 172 converts the third color supplement light into a third color supplement light of another polarization state (such as a second polarization state), the third color supplement light of the another polarization state is transmitted to the second polarization combination element 173 by the second polarization conversion element 172, and the third color supplement light recovered by the second light recovery device 170 of the second polarization combination element 173 is reflected to the second space absorber 171 The inter-light modulator 130, the second spatial light modulator 120 may further modulate the third color supplement light according to image signals (such as the corrected image signals rl and r) to generate a third color image light and provide the third color image light to the image synthesis device 150 for further generating a third color image.
As shown in fig. 11, during a second time period T2 of the modulation period T of one frame image, the excitation light source 111a is turned off, so that the wavelength conversion system 111 is turned off, the first supplemental light source 112 emits second color supplemental light (i.e. the green laser light) to the first light combining element 113, the first light combining element 113 transmits the second color supplemental light to the relay lens 101 via the light splitting device 140, the relay lens 101 transmits the second color supplemental light to the first polarization conversion device 114, the first polarization conversion device 114 converts the second color supplemental light into second color supplemental light having a first polarization state, the first polarization combining element 163 receives the second color supplemental light having the first polarization state emitted by the first polarization conversion device 114 and transmits the second color supplemental light having the first polarization state to the first spatial light modulator 120, the first spatial light modulator 120 modulates the second color supplementary light according to an image signal (such as an image signal g and a corrected image signal gl) to generate a second color image light and a second color non-image light, the first spatial light modulator 120 further provides the second color image light to the image synthesizing device 150 for generating a second color image, the second supplementary light source 115 emits a third color supplementary light (i.e. red laser light) to the second light combining element 116, the second light combining element 116 transmits the third color supplementary light to the second polarization conversion device 117 through the relay lens 102, the second polarization conversion device 117 converts the third color supplementary light into light having one polarization state (either the first polarization state or the second polarization state, which is mainly illustrated by the conversion into light having the first polarization state), the second light combining element 116 receives the third color complementary light with polarization state and directs (e.g. transmits) the third color complementary light with polarization state to the second spatial light modulator 130, the second spatial light modulator 130 modulates the third color supplement light with polarization state according to an image signal (such as a correction image signal rl) to generate a third color image light and a third color non-image light, the image light of the third color is reflected to the image combining device 150, the light combining device 151 of the image combining device 150 receives the image light of the second color and the image light of the third color to combine the image light of the second color and the image light of the third color and provide the combined light to the lens assembly 152, the lens assembly projects the second color image light and the third color image light to generate a second color image and a third color image.
Further, as shown in fig. 11, in the second period T2, the second color non-image light generated by the first spatial light modulator 120 is provided to the first switch absorber 161, the first switch absorber 161 emits second color supplement light of the second color non-image light, the second color supplement light has a first polarization state, the second color supplement light emitted by the first switch absorber 161 is transmitted to the first polarization conversion element 162 via the first relay element 165, the first guide element, the first relay element 166, the first polarization conversion element 162 converts the second color supplement light into second color supplement light of a second polarization state, the second color supplement light of the second polarization state is transmitted to the first polarization combination element 163 by the first polarization conversion element 162, and the second color supplement light recovered by the first light recovery device 160 is reflected to the first polarization combination element 163 The first spatial light modulator 120, the first spatial light modulator 120 can further modulate the second color supplement light according to the image signal (such as the corrected image signal gl) to generate a second color image light, the second color image light is provided to the image synthesis device 150 for further generating a second color image; the third color non-image light generated by the second spatial light modulator 130 is provided to the second switch-type absorber 171, the second switch-type absorber 171 emits a third color supplement light of the third color non-image light, the third color supplement light has a polarization state (such as a first polarization state), the third color supplement light emitted by the second switch-type absorber 171 is transmitted to the second polarization conversion element 172 through the second relay element 175, the second guiding element 174 and the second relay element 176, the second polarization conversion element 172 converts the third color supplement light into a third color supplement light of another polarization state, the third color supplement light of the another polarization state (such as a second polarization state) is transmitted to the second polarization combination element 173 by the second polarization conversion element 172, and the third color supplement light recovered by the second light recovery device 170 of the second polarization combination element 173 is reflected to the second space absorber 171 The inter-light modulator 130, the second spatial light modulator 120 may further modulate the third color supplement light according to an image signal (e.g. a corrected image signal rl) to generate a third color image light and provide the third color image light to the image synthesizing device 150 for further generating a third color image.
As shown in fig. 11, in a third time period T3 of the modulation period T of one frame image, the excitation light source 111a emits a first color light (i.e. blue laser light), the wavelength conversion element 111b emits a first color light to the first light combining element 113, the first supplemental light source 112 is turned off, the first light combining element 113 reflects the first color light to the light splitting device 140, the light splitting device 140 guides (transmits) the first color light to the relay lens 101, the relay lens 101 transmits the first color light to the first polarization conversion device 114, the first polarization conversion device 114 converts the first color light into a first color light having a first polarization state, the first polarization combining element 163 receives the first color light having the first polarization state emitted by the first polarization conversion device 114 and transmits the first color light having the first polarization state to the first spatial light modulator 120, the first spatial light modulator 120 modulates the first color light according to an image signal (e.g., an image signal b) to generate a first color image light and a first color non-image light, the first spatial light modulator 120 further provides the first color image light to the image synthesis device 150 for generating a first color image, the second supplemental light source 115 emits a third color supplemental light (i.e., red laser light) to the second light combining element 116, the second light combining element 116 reflects the third color supplemental light to the relay lens 102, the relay lens 102 transmits the third color supplemental light to the second polarization conversion device 117, the second polarization conversion device 117 converts the third color supplemental light into light having a polarization state (both the first polarization state and the second polarization state, which is mainly illustrated in this embodiment by light converted into the first polarization state), the second light combining element 116 receives the third color supplement light with polarization state (e.g. the first polarization state) and directs (e.g. transmits) the third color supplement light with polarization state to the second spatial light modulator 130, the second spatial light modulator 130 modulates the third color supplement light with polarization state according to an image signal (such as a correction image signal rl) to generate a third color image light and a third color non-image light, the image light of the third color is reflected to the image synthesis apparatus 150, the light combination apparatus 151 of the image synthesis apparatus 150 receives the image light of the first color and the image light of the third color to combine the image light of the first color and the image light of the third color and provide the combined light to the lens assembly 152, the lens assembly projects the first color image light and the third color image light to generate a first color image and a third color image.
Further, as shown in fig. 11, in the third period T3, the first color non-image light generated by the first spatial light modulator 120 is provided to the first switch absorber 161, the first switch absorber 161 emits the first color non-image light having a first polarization state, the first color non-image light emitted by the first switch absorber 161 is transmitted to the first polarization conversion element 162 via the first relay element 165, the first guide element, the first relay element 166, the first polarization conversion element 162 converts the first color non-image light into first color non-image light of a second polarization state, the first color non-image light of the second polarization state is transmitted to the first polarization combining element 163 by the first polarization conversion element 162, and the first color non-image light recovered by the first light recovery device 160 by the first polarization combining element 163 is reflected to the first color non-image light A spatial light modulator 120, said first spatial light modulator 120 being further capable of modulating said first color non-image light in accordance with said image signal (e.g. correction image signal b) to generate first color image light, said first color image light being provided to said image combining means 150 for further generating a first color image; the third color non-image light generated by the second spatial light modulator 130 is provided to the second switch-type absorber 171, the second switch-type absorber 171 emits a third color supplement light of the third color non-image light, the third color supplement light has a polarization state (such as a first polarization state), the third color supplement light emitted by the second switch-type absorber 171 is transmitted to the second polarization conversion element 172 through the second relay element 175, the second guiding element 174 and the second relay element 176, the second polarization conversion element 172 converts the third color supplement light into a third color supplement light of another polarization state, the third color supplement light of the another polarization state (such as a second polarization state) is transmitted to the second polarization combination element 173 by the second polarization conversion element 172, and the third color supplement light recovered by the second light recovery device 170 of the second polarization combination element 173 is reflected to the second space absorber 171 The inter-light modulator 130, the second spatial light modulator 120 may further modulate the third color supplement light according to image signals (such as the corrected image signals rl and r) to generate a third color image light and provide the third color image light to the image synthesis device 150 for further generating a third color image.
It can be understood that, as shown in fig. 9, 10, and 11, the
Further, for the
And furthermore, the second color supplement light and the third color supplement light are green laser and red laser, and the pure laser has better monochromaticity, so that the color gamut is wider and the price is more expensive, and the brightness of the picture pure laser can be enhanced while the cost is saved by recovering the pure laser.
Taking red laser as an example, assuming that there are 10000 pixels in the effective picture, each pixel has 256 gray levels (0-255), and we refer to a red picture with all pixels RGB gray levels (255, 0, 0) in a frame as 2550000 "units" of red light, regardless of diffraction loss and other losses. If only 1200000 "units" of red laser light are needed in a frame, the utilization rate of the red laser light is only 47% without the light recycling system, but after the light recycling system is added, when the red laser light is recycled only once, the utilization rate is increased to 71.9%, that is, the brightness of the red laser pixel on the frame is increased by 53% without increasing the power consumption of the laser.
In addition, the
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
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