阅读说明：本技术 显示设备 (Show equipment ) 是由 杜鹏 郭祖强 于 2018-05-17 设计创作，主要内容包括：一种显示设备包括控制器、光源驱动器、光源装置及光调制装置。所述光源装置包括激发光源、波长转换装置及补偿光源,光调制装置包括第一及第二空间光调制器。控制器用于发出驱动信号至光源驱动器以及发出图像信号至光调制装置。激发光源发出第一颜色光,波长转换装置产生第二颜色光及第三颜色光,光源驱动器控制补偿光源发出第一补偿光与第二补偿光中的至少一种。第一空间光调制器在第一时间段依调制第一颜色光与至少一种补偿光产生图像光以及在第二时间段调制第二颜色光,第二空间光调制器在第一时间段调制至少一种补偿光以及在第二时间段调制第三颜色光。(A kind of display equipment includes controller, light source drive, light supply apparatus and optic modulating device.The light supply apparatus includes excitation light source, Wavelength converter and compensatory light, and optic modulating device includes first and second spatial light modulator.Controller is for issuing driving signal to light source drive and issuing picture signal to optic modulating device.Excitation light source issues the first color of light, and Wavelength converter generates the second color of light and third color of light, and light source drive controls compensatory light and issues at least one of the first compensation light and the second compensation light.First spatial light modulator generates image light according to the first color of light of modulation and at least one compensation light in first time period and modulates the second color of light in second time period, and second space optical modulator modulates at least one compensation light in first time period and modulates third color of light in second time period.)

1. a kind of display equipment, it is characterised in that: the display equipment includes controller, light source drive, light supply apparatus and light Modulating device, the light supply apparatus include excitation light source, Wavelength converter and compensatory light, and the optic modulating device includes the One spatial light modulator and second space optical modulator；

The controller is used to issue driving signal to the light source drive and issues the picture signal of piece image to institute State optic modulating device；

The light source drive receive the driving signal that the controller issues control the excitation light source issue exciting light and It controls the compensatory light and issues the first compensation light and the second compensation light, the exciting light is the first color of light, and described first mends It repays light and the second compensation light is used to expand the gamut range of the display equipment；

The Wavelength converter generates the second color of light and third color of light, the width figure for receiving a part of exciting light The picture signal of picture includes the first color image signals, the second color image signals and third color image signals of each pixel；

First spatial light modulator is for the first time period within the modulation period of piece image according to first face First color of light described in color image signal modulation and at least one of the first compensation light and the second compensation light generate Image light and the second time period in the modulation period of the width image according to second color image signals modulation described in Second color of light generates image light；

The second space optical modulator is used in the first time period according to image signal correction or first color diagram As one of signal, the second color image signals and third color image signals modulation first compensation light and the second compensation At least one of light generates image light and in the second time period according to described in third color image signals modulation Third color of light generates image light, wherein the image signal correction is according to first color image signals, the second color At least one of picture signal and third color image signals, which calculate, to be obtained.

2. display equipment as described in claim 1, it is characterised in that: the first compensation light and the second color light color Identical, the second compensation light is identical as the third color light color, in the first time period, the first spatial light tune Device processed modulates first color of light and the second compensation light generates image light, described in the second space light modulator modulates First compensation light generates image light.

3. display equipment as claimed in claim 2, it is characterised in that: the excitation purity of the first compensation light is greater than described second The excitation purity of color of light, the second compensation light is greater than the third color of light.

4. display equipment as claimed in claim 2, it is characterised in that: first spatial light modulator is in second time Section also receive it is described first compensation light, and first spatial light modulator in the second time period also according to second face Second color of light described in color image signal modulation and the first compensation light generate image light, and the second space optical modulator exists The second time period also receives the second compensation light, and the second space optical modulator was also used in second time Section modulates the third color of light according to the third color image signals and the second compensation light generates image light.

5. the display equipment as described in 1-4 any one of claim, it is characterised in that: controlled by the light source drive The ratio and timing of the first, second and third color of light and the first, second compensation light that the light supply apparatus issues, and The optic modulating device is controlled to carry out image modulation according to described image signal and timing and then generate and the original image number According to the consistent image light of brightness and gamut range.

6. display equipment as claimed in claim 2, it is characterised in that: first spatial light modulator is in second time Section also receive it is described first compensation light, and first spatial light modulator be also used to the first time period also according to described in First color image signals modulate first color of light and the first compensation light generates image light, the second space light tune Device processed also receives the second compensation light in the second time period, and the second space optical modulator is also used to described the One period generated image light according to image signal correction modulation the second compensation light, and the image signal correction is institute A times for stating the first color image signals, a are the constant for being less than or equal to 1 more than or equal to 0.

7. display equipment as claimed in claim 2, it is characterised in that: the light source drive is also used to receive the controller The driving signal of sending controls the exciting light that the excitation light source issues, so that the excitation light source is sent out in the first time period The intensity of exciting light out is greater than the intensity in the second time period.

8. display equipment as claimed in claim 2, it is characterised in that: first spatial light modulator is in second time Section also receive it is described first compensation light, and first spatial light modulator be also used to the first time period also according to described in First color image signals modulate first color of light and the first compensation light generates image light, the second space light tune Device processed also receives the second compensation light in the second time period, and the second space optical modulator is also used to described the One period generated image light, the image signal correction according to the image signal correction f (H) modulation the second compensation light F (H)=a*f (B)+b*f (G), wherein a is the constant for being less than or equal to 1 more than or equal to 0, and b is greater than 0 and less than or equal to 1-a's Constant, f (B) and f (G) respectively represent first color image signals and third color image signals.

9. display equipment as claimed in claim 2, it is characterised in that: first spatial light modulator is in second time Section also receive it is described first compensation light, and first spatial light modulator be also used to the first time period also according to described in First color image signals modulate first color of light and the first compensation light generates image light, the second space light tune Device processed also receives the second compensation light in the second time period, and the second space optical modulator is also used to described the One period generated image light, the image signal correction according to the image signal correction f (L) modulation the second compensation light F (L)=a*f (B)+b*f (G), wherein a is the constant for being less than or equal to 1 more than or equal to 0, it is assumed that the image signal correction is n Bit, b=(2ⁿ- 1)/Gmax-a*Bmax/Gmax, f (B) and f (G) respectively represent first color image signals and third face Color picture signal, Bmax are the maximum value max { f (B) } in the width image data in the first color image signals of each pixel, Gmax is the maximum value max { f (G) } in the width image data in the third color image signals of each pixel.

10. display equipment as described in claim 1, it is characterised in that: the excitation light source is blue laser light source, described the One color of light is blue laser, and second color of light is one of red fluorescence and green fluorescence, the third color of light For another in red fluorescence and green fluorescence, the compensatory light includes laser light source, and the first compensation light is red Color laser and one kind identical with the second color light color in green laser, the second compensation light be red laser with it is green One kind identical with the third color light color in color laser.

Technical field

The present invention relates to field of display technology more particularly to a kind of display equipment, such as projection display apparatus.

Background technique

Currently, spatial light modulator (SLM) is widely applied in field of projection display, spatial light modulator is generally comprised LCD, LCOS, DMD etc..Classified according to spatial light modulator quantity, can be divided into one chip, double-disk and three-chip type 3 and be System.In double-disk system, not only there is timing light splitting, but also there are space light splitting.Usual light source provides blue laser and adds yellow fluorescence (B+Y) sequential light, first time sequence light source provide blue illumination light, by wherein a room optical modulator to blue light images into Row modulation, second time sequence light source provide yellow light illumination light, are divided into feux rouges through glazer and illuminated with green light irradiates two panels respectively Spatial light modulator, and feux rouges and green light image are modulated simultaneously.Double-disk system can efficiently utilize yellow light illumination light, but meeting The problem is that: the yellow light of wide spectrum is divided into feux rouges and green light, and brightness or the excitation purity for getting primary colours are lower, for example, in order to The preferable feux rouges of excitation purity is obtained, then green light is given into the wide part of orange light section, the brightness for testing feux rouges can be lower, and green The excitation purity of light also accordingly reduces.

Specifically, as shown in Figure 1, in a kind of display equipment, light source provides the blue light and yellow light illumination light of timing, is dividing Light microscopic piece punishment light irradiates two panels spatial light modulator (SLM1 and SLM2) respectively, and spatial light modulator (SLM1 and SLM2) receives Picture signal is modulated illumination light, generates modulation light in light splitting eyeglass light combination, eventually passes through camera lens and be projected out color image. Wherein, light microscopic piece can be Green-pass plated film, be also possible to Red-pass plated film.

As shown in Fig. 2, light source provides blue illumination light in first timing, and irradiate spatial light modulator SLM-1 generation Blue light images；In second timing, light source provides yellow light illumination light, is divided into feux rouges through light splitting eyeglass and green light illuminates space respectively Optical modulator SLM-1 and spatial light modulator SLM-2 generates feux rouges image and green light image, figure it is seen that In respectively First time sequence spacing optical modulator SLM-2 be it is idle, light energy is not maximally utilized.

In addition, as shown in figure 3, yellow light is usually swashed by blue light exciting light since feux rouges and green light are to be divided to obtain by yellow light The emitting phosphor that turns to be yellow generates, and spectrum is wider.Therefore the brightness of two kinds of primary lights and excitation purity influence each other, finally in order to match out The white light coordinates for meeting human eye vision, are divided according to red-green glow brightness ratio, obtain the excitation purity of red-green glow so not Can be high, therefore the colour gamut of image that the display equipment is shown is relatively narrow.

Summary of the invention

In view of this, the present invention provides a kind of display equipment of achievable wider color gamut.

A kind of display equipment includes controller, light source drive, light supply apparatus and optic modulating device, the light supply apparatus packet Excitation light source, Wavelength converter and compensatory light are included, the optic modulating device includes that the first spatial light modulator and second are empty Between optical modulator, the controller be used for issue driving signal to the light source drive and issue piece image image letter Number to the optic modulating device, the light source drive receives the driving signal that the controller issues and controls the excitation light source It issues exciting light and the control compensatory light issues the first compensation light and the second compensation light, the exciting light is the first color Light, the first compensation light and the second compensation light are used to expand the gamut range of the display equipment, the wavelength convert For receiving, a part of exciting light generates the second color of light to device and third color of light, the picture signal of the width image include The first color image signals, the second color image signals and the third color image signals of each pixel, the first spatial light tune Device processed is for the first time period within the modulation period of piece image according to first color image signals modulation described the One color of light and at least one of the first compensation light and the second compensation light generate image light and in the width image Modulation period in second time period modulate second color of light according to second color image signals and generate image light, The second space optical modulator is used to modulate in the first compensation light and the second compensation light extremely in the first time period A kind of few generations image light and in the second time period according to the third color image signals modulation third color Light generates image light.

Compared with prior art, it the invention shows in equipment, on the basis of the exciting light and stimulated light, increases Compensatory light issues compensation light, not only guarantees the brightness for increasing the light supply apparatus, it is also possible that the light supply apparatus issues The colour gamut of light extended so that the colour gamut for the image that the display equipment is finally shown is wider.In addition, described One and second two spaces optical modulator in two periods carry out image modulation, improve the utilization of the optic modulating device Rate, so that the light that light supply apparatus issues is maximally utilized.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram for showing equipment.

Fig. 2 is the image modulation time diagram of the two spaces optical modulator of display equipment shown in Fig. 1.

Fig. 3 is the spectral schematic for the light that the light source of display equipment shown in Fig. 1 issues.

Fig. 4 is the structural schematic diagram of the display equipment of first embodiment of the invention.

Fig. 5 is the schematic diagram of the Wavelength converter of display equipment shown in Fig. 4.

Fig. 6 is the gamut range schematic diagram of display equipment shown in Fig. 4.

Fig. 7 is the light source control timing and image modulation time diagram of display equipment shown in Fig. 4.

Fig. 8 is the light source control timing and image modulation time diagram of the display equipment of second embodiment of the invention.

Fig. 9 is the light source control time diagram of the display equipment of third embodiment of the invention.

Figure 10 is the light source control timing signal of the display equipment of third embodiment of the invention and its change embodiment Figure.

Figure 11 is the image modulation time diagram of the display equipment of four embodiment of the invention.

Figure 12 is the image modulation time diagram of the display equipment of the change embodiment of fifth embodiment of the invention.

Figure 13 is that the image signal correction of the display equipment of fifth embodiment of the invention generates and the principle of processing is illustrated Figure.

Main element symbol description

Show equipment 100

Controller 110

Light source drive 120

Light supply apparatus 130

Optic modulating device 140

Excitation light source 131

Wavelength converter 132

Compensatory light 133

Laser light source 134,135

First spatial light modulator 141

Second space optical modulator 142

First gamut range F1

Second gamut range F2

Part gamut range P

First color of light B

Stimulated light Y

Second color of light R1

Third color of light G1

First compensation light R2

Second compensation light G2

First color image signals B₀

Second color image signals R₀

Third color image signals G₀

The present invention that the following detailed description will be further explained with reference to the above drawings.

Specific embodiment

Referring to Fig. 4, Fig. 4 is the structural schematic diagram of the display equipment of first embodiment of the invention.In present embodiment, Display equipment 100 be projection display apparatus, display equipment 100 include controller 110, light source drive 120, light supply apparatus 130, And optic modulating device 140.Controller 110 is for issuing driving signal to light source drive 120 to control by light source drive 120 Light supply apparatus 130 processed shines, and controller 110 is also used to issue the picture signal of piece image to optic modulating device 140, so that light The light that modulating device 140 is issued according to the image signal modulation light supply apparatus 130 of the width image is to generating image light.

Specifically, light supply apparatus 130 includes excitation light source 131, Wavelength converter 132 and compensatory light 133.Exciting light Source 131 is for issuing exciting light, and Wavelength converter 132 is for receiving exciting light and exciting light being converted to stimulated light.This reality It applies in mode, excitation light source 131 is laser light source, and such as blue laser light source, exciting light is the first color of light B, i.e. blue laser. Wavelength converter 132 has wavelength conversion material (such as yellow fluorescent material), for generating yellow fluorescence as stimulated light Y, It is appreciated that stimulated light Y is the mixed light of the second color of light R1 and third color of light G1, specifically, the second color of light R1 is Huang Red light (i.e. red fluorescence) in color fluorescence, third color of light G1 are the green light (i.e. green fluorescence) in yellow fluorescence.

Referring to Fig. 5, Fig. 5 is the schematic diagram of the Wavelength converter 132 of display equipment 100 shown in Fig. 4.Wavelength convert dress Set 132 can for colour wheel, including the first sectional area 132a and the second sectional area 132b being along the circumferential direction set in sequence, the Scattering material can be set on one sectional area 132a, for receiving exciting light and being scattered exciting light to described in sending Wavelength conversion material can be set on first color of light B, the second sectional area 132b, be excited for receiving exciting light and generating Light.It is appreciated that excitation light source 131 and Wavelength converter 132 form B+Y light source, for issuing the first color of light B and being excited Light Y, wherein stimulated light Y includes the second color of light R1 and third color of light G1.It is appreciated that light supply apparatus 130 can be further Including beam splitter, for being the second color of light R1 and third color of light G1 by stimulated light light splitting.

Compensatory light 133 is for issuing at least one of the first compensation light R2 and the second compensation light G2, it will be understood that the One compensation light R2 and the second compensation light G2 is used to expand the gamut range of display equipment.Specifically, it first compensates light R2 and is excited The second color of light R1 color of light Y is identical and excitation purity is greater than the second color of light R1, the second compensation light G2 of stimulated light Y and is excited The third color of light G1 color of light Y is identical and excitation purity is greater than the third color of light G1 of stimulated light Y.In present embodiment, first Compensating the compensation of light R2 and second light G2 is laser, and such as red laser and green laser, compensatory light 133 includes red for issuing The laser light source 134 of color laser and laser light source 135 for issuing green laser.It is appreciated that in change embodiment, Second color of light can be green fluorescence, and third color of light is red fluorescence, and the first compensation light accordingly divides with the second compensation light It Wei not green laser and red laser.

Referring to Fig. 6, Fig. 6 is the gamut range (light that the i.e. described light supply apparatus 130 issues of display equipment 100 shown in Fig. 4 Gamut range) schematic diagram.Specifically, in the light that light supply apparatus 130 issues, first, second and third color of light B, R1, G1 Mixed light gamut range be the first gamut range F1, the first color of light B and first, second compensation light R2, G2 mixed light Gamut range be the second gamut range F2, the second gamut range F2 includes the first gamut range F1 and including being located at the first colour gamut Part gamut range P except range.The mixed light of the compensation light of first, second and third color of light B, R1, G1 and first, second Gamut range be third gamut range F3, third gamut range F3 be positioned at the first gamut range F1 and the second colour gamut model Enclose any one gamut range between F2.It is appreciated that the first gamut range F1, the second gamut range F2 and third gamut range F3 is delta-shaped region, and three vertex of the same color of first, second and third gamut range F1, F2 and F3 are same On straight line, such as three Green vertices (g1, g2 and g3) of first, second and third gamut range F1, F2 and F3 are in same On straight line, by light source drive 120 control the first, second and third color of light that light supply apparatus 130 issues and it is described first, The gamut range for the light that the light mixng proportion of second compensation light can make light supply apparatus 130 issue is in the first gamut range F1, the Dynamic change in two gamut range F2 and third gamut range F3.Wherein, the first gamut range can be DCI gamut range, such as Gamut range DCI-P3；Second gamut range F2 can be REC gamut range, such as gamut range REC.2020.

It is appreciated that controller 110 be used for receive signal source sending the width image raw image data, and judge according to The gamut range of the width image is judged according to the raw image data of the width image and according to the gamut range output of the width image The driving signal is to light source drive 120 and exports the picture signal of the width image to optic modulating device 140, to pass through light Source drive 120 controls first, second and third color of light B, R1, G1 that light supply apparatus 130 issues and described first, second and mends Repay the ratio and timing of light R2, G2, and picture signal and corresponding modulation of the control optic modulating device 140 according to the width image Timing carries out image modulation and then generates the brightness and the consistent image light of gamut range with the raw image data of the width image. In particular, it will be appreciated that by light source drive 120 control light supply apparatus 130 issue the first, second and third color of light B, The light mixng proportion of R1, G1 and described first, second compensation light R2, G2, the colour gamut model for the light that light supply apparatus 130 can be made to issue Enclose with the variation of the gamut range of the width image and change, optic modulating device 140 export image light gamut range with The variation of the gamut range of the width image and change, thus show equipment 100 realize dynamic gamut.

In present embodiment, optic modulating device 140 includes the first spatial light modulator 141 and second space optical modulator 142, wherein the first spatial light modulator 141 and second space optical modulator 142 can be DMD spatial light modulator.It is described First spatial light modulator 141 be used to modulate according to first color image signals first color of light generate image light with And second color of light is modulated according to second color image signals and generates image light, the second space optical modulator 142 modulate institute for one of first color image signals, the second color image signals and third color image signals It states at least one of the first compensation light and the second compensation light and generates image light and according to the third color image signals tune It makes the third color of light and generates image light.

Referring to Fig. 7, Fig. 7 is the light source control timing and image modulation time diagram of display equipment 100 shown in Fig. 4. The modulation time of the width image includes first time period and second time period.The picture signal of the width image includes the of each pixel One color image signals B₀, the second color image signals R₀And third color image signals G₀。

In first time period, light source drive 120 receives the driving signal that controller 110 issues and controls excitation light source 131 Exciting light is issued, exciting light is the first color of light B, and exciting light is directed to the first spatial light modulator 141.

In second time period, light source drive 120 receives the driving signal that controller 110 issues and controls excitation light source 131 Exciting light is issued, exciting light is converted to stimulated light Y by Wavelength converter 132, and stimulated light Y includes the second color of light R1 and third Color of light G1, the second color of light R1 are directed to the first spatial light modulator 141, and third color of light G1 is directed to second space Optical modulator 142.

Further, in first time period and second time period, light source drive 120 is also controlled according to driving signal and is compensated Light source 133 issues at least one of the first compensation light R2 and the second compensation light G2, the first compensation light R2 and the second color of light R1 Color is identical and excitation purity is greater than the second color of light R1, and the second compensation light G2 is identical as third color of light G1 color and excitation purity is big Optic modulating device 140 is directed in third color of light G1, at least one of the first compensation light R2 and the second compensation light G2.Its In, light source drive 110 can control what compensatory light 133 issued according to the gamut range of the raw image data of the width image The intensity of first compensation light R2 and the second compensation light G2.

Specifically, in present embodiment, the first spatial light modulator 141 first time period receive the first color of light B and First compensation light R2, therefore the first spatial light modulator 141 is in the first color image signals B of first time period foundation₀Modulation first The compensation of color of light B and first light R2 generates image light, and second space optical modulator 142 receives the second compensation light in first time period G2, therefore second space optical modulator 142 is in the first color image signals B of the first time period foundation₀Modulation the second compensation light G2 generates image light.

First spatial light modulator 141 receives the compensation of the second color of light R1 and first light R2 in second time period, therefore first Spatial light modulator 141 is in second time period according to the second color image signals R₀Modulate the compensation light of the second color of light R1 and first R2 generates image light, and second space optical modulator 142 receives the compensation light G2 of third color of light G1 and second in second time period, therefore Second space optical modulator 142 is in the second time period according to third color image signals G₀Modulate third color of light G1 and the Two compensation light G2 generate image light.

Compared with prior art, it the invention shows in equipment 100, on the basis of exciting light and stimulated light, increases Compensatory light 133 issues compensation light, not only guarantees to increase the second color of light (the including stimulated light Y that light supply apparatus 130 issues Second colors light R1 and first compensation light R2) and third color of light (including the third color of light G1 of stimulated light Y with second compensate light G2 brightness), further, since the excitation purity of compensation light is greater than stimulated light, but also the color for the light that light supply apparatus 130 issues Domain is extended, so that the colour gamut for the image that display equipment 100 is finally shown is wider.In addition, first and second two Spatial light modulator 141,142 carries out image modulation in two periods, improves the utilization rate of optic modulating device 140, makes The light that light supply apparatus 130 issues is obtained to be maximally utilized.

Referring to Fig. 8, when Fig. 8 is the light source control timing and image modulation of the display equipment of second embodiment of the invention Sequence schematic diagram.The display equipment of second embodiment and the display equipment of first embodiment are essentially identical, that is to say, that above-mentioned It substantially can be adapted for the display equipment of second embodiment, the area of the two to the description of the display equipment of first embodiment It does not essentially consist in: in second embodiment, in first time period, raw image data of the light source drive according to the width image Gamut range controls the intensity for the first compensation light R2 that compensatory light issues, and the second compensation light that control compensatory light issues The intensity of G2 is steady state value (such as maximum value), and second space optical modulator is then according to image signal correction modulation the first compensation light G2 image light is generated at least one of the second compensation light (such as described second compensation light), image signal correction is according to first At least one of color image signals, the second color image signals and third color image signals, which calculate, to be obtained, this embodiment party In formula, the image signal correction is the first color image signals B₀A times, a be more than or equal to 0 be less than or equal to 1 Constant, a can also become constant operator, it will be understood that the value of a can be according to the raw image data brightness of the width image Or gamut range determines.

In the second embodiment, the intensity for issuing the compensatory light of the second compensation light G2 is steady state value, but is passed through Constant operator a calculates the image signal correction of input second space optical modulator 142, can achieve same as first embodiment Technical effect.

Fig. 9 is the light source control time diagram of the display equipment of third embodiment of the invention.Third embodiment Show that the display equipment of equipment and first embodiment is essentially identical, that is to say, that the above-mentioned display to first embodiment is set Standby description substantially can be adapted for the display equipment of third embodiment, and the difference of the two essentially consists in: third embodiment party In formula, light source drive control excitation light source is greater than in the intensity for the exciting light that first time period issues in the strong of second time period Degree.Specifically, it can control excitation light source and be greater than the driving current in second time period in the driving current of first time period.

Because in first and second embodiment, by increasing first and second compensation light R2 and G2, display equipment is finally sent out Not only excitation purity improves the second color of light out, and brightness also improves, but since the brightness of the first color of light B does not mention Height therefore in the third embodiment, can be to the first face by increasing the luminous intensity of the first color of light B in first time period Coloured light B is compensated, and achievees the effect that improve the first color of light B brightness.

In addition, as shown in Figure 10, it, can also be by increasing by first in a kind of change embodiment of third embodiment The duty ratio (i.e. the accounting that the first color of light B goes out light in B+Y light source) of the exciting light of period mends the first color of light B It repays, achievees the effect that improve the first color of light B brightness.In the change embodiment, excitation light source 131 is in first time period and the The luminous intensity of two periods can be identical, but in the case where the modulation time of piece image is constant, first time period can be grown First time period in third embodiment, correspondingly, when second time period can be shorter than second in third embodiment Between section, specifically, the length of the first sectional area of the Wavelength converter of the display equipment can be elongated, the second segment identifier The length in domain can be reduced accordingly.Further, since the variation of first time period and second time period time, the image letter of each color Number grayscale value need corresponding adjustment, i.e., so that described two spatial light modulators (digital modulators such as especially DMD) are new Duty ratio in the lower each gray level for realizing 8bit or other digits.

It is appreciated that the first color of light that the third embodiment mainly issues light supply apparatus by way of amplitude modulation B is compensated, the first face that the change embodiment of third embodiment mainly issues light supply apparatus by way of frequency modulation Coloured light B is compensated, and the two can achieve almost the same technical effect.

Figure 11 is the light source control timing and image modulation time diagram of the display equipment of four embodiment of the invention. The display equipment of 4th embodiment and the display equipment of second embodiment are essentially identical, that is to say, that above-mentioned real to second The description for applying the display equipment of mode substantially can be adapted for the display equipment of the 4th embodiment, and the difference of the two mainly exists In: in the 4th embodiment, second space optical modulator is mended in first time period according to image signal correction f (H) modulation second It repays light G2 and generates image light, image signal correction f (H) can be according to the first color image signals B₀, the second color image signals R₀ And third color image signals G₀At least one of calculate and obtain, in present embodiment, image signal correction f (H)=a*f (B)+b*f (G), wherein a is the constant for being less than or equal to 1 more than or equal to 0, and b is the constant greater than 0 and less than or equal to 1-a, f (B) The first color image signals B is respectively represented with f (G)₀With third color image signals G₀。

In 4th embodiment, compensatory light issue second compensation light G2 intensity can constant (for example maximum value), Second space optical modulator is modulated the second compensation light G2 according to the image signal correction calculated using image operator H, can It is used to compensate brightness and the color of third color of light G1 for correcting the first color of light B (blue primaries), another part with one side Purity.

Since second space optical modulator carries out the second compensation for compensating light G2 in two periods, can be improved The brightness of image or the brightness maintained like and the use for reducing compensatory light quantity, and then reduce cost.

Further, on image signal correction algorithm, the second space optical modulator input signal of first time period was both The revise signal of the first color of light B is contained, and includes the signal of third color image, and signal cannot overflow grayscale, this Some linear operators that embodiment specifically uses realize that picture signal calculates, such as constant operator a in this second embodiment On the basis of, another constant operator b is introduced while accessing third color image signals, so that finally entering second space light The new images signal f (H) of modulator=a*f (B)+b*f (G), wherein b > 0 and b≤1-a, the second space light tune as b=1-a Device processed is maximally utilized in first time period.

In summary, it is contemplated that in order to keep brightness of image, reduce and provide the second compensation light to second space optical modulator The quantity of the compensatory light of G2 reduces cost, according to above-mentioned image algorithm H, in second space optical modulator in first time period To its second time period without brightness contribution in the case where, the quantity of compensatory light G2 can be reduced to original 1/ (1+b).

Figure 12 is the light source control timing and image modulation time diagram of the display equipment of four embodiment of the invention. The display equipment and the display equipment of the 4th embodiment of 5th embodiment are essentially identical, that is to say, that above-mentioned real to the 4th The description for applying the display equipment of mode substantially can be adapted for the display equipment of the 5th embodiment, and the difference of the two mainly exists In: second space optical modulator is also used in first time period according to image signal correction f (L) modulation the second compensation light G2 Image light is generated, image signal correction f (L) can be according to the first color image signals B₀, the second color image signals R₀And third Color image signals G₀At least one of calculate and obtain, in present embodiment, image signal correction f (L)=a*f (B)+b*f (G), wherein a is the constant for being less than or equal to 1 more than or equal to 0, it is assumed that the image that the image signal correction f (L) is n bit is believed Number, b=(2ⁿ- 1)/Gmax-a*Bmax/Gmax, f (B) and f (G) respectively represent the first color image signals B₀With third color diagram As signal G₀, Bmax is the first color image signals B of each pixel in the width image data₀In maximum value max { f (B) }, Gmax is the third color image signals G of each pixel in the width image data₀In maximum value max { f (G) }.

Specifically, as shown in figure 13, the step of generation and processing of image signal correction f (L) may include:

Receive the first color image signals B of each pixel of the width image₀And third color image signals G₀；

Obtain the first color image signals B of each pixel in the width image data₀In maximum value Bmax and the width image The third color image signals G of each pixel in data₀In maximum value Gmax；

According to formula b=(2ⁿ- 1)/Gmax-a*Bmax/Gmax calculates b value；

Image signal correction f (L) is calculated using formula f (L)=a*f (B)+b*f (G)；

Image signal correction f (L) is provided to second space optical modulator.

Mode the above is only the implementation of the present invention is not intended to limit the scope of the invention, all to utilize this Equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content, it is relevant to be applied directly or indirectly in other Technical field is included within the scope of the present invention.