阅读说明：本技术 基于光阀液晶的指向背光裸眼3d显示装置和方法 (Light valve liquid crystal-based directional backlight naked-eye 3D display device and method ) 是由 刘兴宾 邓冬岩 王树颖 詹韶晖 胡见泳 于 2021-08-23 设计创作，主要内容包括：本发明公开了一种基于光阀液晶的指向背光裸眼3D显示装置和方法,指向背光裸眼3D显示装置包括：指向背光单元,包括左眼光源和右眼光源；光阀液晶单元,包括多个透光区域；图像显示单元,包括多个显示区域；驱动单元；所述显示区域显示所述左眼图像时,光线经所述透光区域和与该透光区域的显示区域以形成左眼图像；所述显示区域显示所述右眼图像时,光线经所述透光区域和与该透光区域的显示区域以形成右眼图像。在显示过程中,图像显示单元根据显示区域的设置来刷新左眼图像或右眼图像,从而可以有效降低指向背光裸眼3D显示系统中,因图像显示液晶屏幕响应时间过慢导致的屏幕刷新串扰。(The invention discloses a directional backlight naked eye 3D display device and a method based on light valve liquid crystal, wherein the directional backlight naked eye 3D display device comprises: a directional backlight unit including a left-eye light source and a right-eye light source; a light valve liquid crystal cell including a plurality of light transmissive regions; an image display unit including a plurality of display areas; a drive unit; when the display area displays the left eye image, light rays pass through the light-transmitting area and the display area of the light-transmitting area to form the left eye image; when the display area displays the right eye image, light passes through the light-transmitting area and the display area of the light-transmitting area to form the right eye image. In the display process, the image display unit refreshes the left eye image or the right eye image according to the setting of the display area, so that the screen refreshing crosstalk caused by too slow response time of an image display liquid crystal screen in a directional backlight naked eye 3D display system can be effectively reduced.)

1. A directional backlight naked eye 3D display device based on light valve liquid crystal is characterized by comprising:

a directional backlight unit for providing a backlight;

the light valve liquid crystal unit comprises a plurality of light transmitting areas, and when the light transmitting areas are in an open state, light penetrates through the light transmitting areas of the light valve liquid crystal unit; when the light-transmitting area is in a closed state, the light is shielded by the light-transmitting area of the light valve liquid crystal unit;

the image display unit comprises a plurality of display areas for displaying images, and the display areas correspond to the light-transmitting areas one by one;

the driving unit is respectively connected with the directional backlight unit, the light valve liquid crystal unit and the image display unit and is used for controlling the directional backlight unit to be turned on or turned off and controlling the light-transmitting area and the display area corresponding to the light-transmitting area to be refreshed synchronously;

after a display area of the image display unit finishes image refreshing, the driving unit controls the directional backlight unit to emit light and controls the light-transmitting unit corresponding to the display area to be opened so as to project an image, and meanwhile, the display area which does not finish image refreshing is controlled to continue refreshing the image.

2. The light valve liquid crystal-based directional backlight naked-eye 3D display device as claimed in claim 1, wherein the light transmissive regions are arranged in a matrix within the light valve liquid crystal cell, including at least one row or at least one column of the light transmissive regions.

3. The light valve liquid crystal based directional backlight naked eye 3D display device of claim 2, wherein the display areas are arranged in a matrix in the image display unit and comprise at least one row or at least one column of the display areas.

4. The light valve liquid crystal-based directional backlight naked-eye 3D display device as claimed in claim 3, wherein the light valve liquid crystal unit is arranged between the directional backlight unit and the image display unit, the directional backlight unit comprises a left eye light source for projecting light to the left eye and a right eye light source for projecting light to the right eye, and the light projected by the left eye light source or the right eye light source sequentially passes through the light valve liquid crystal unit and the image display unit to form a left eye image or a right eye image.

5. The light valve liquid crystal-based directional backlight naked-eye 3D display device as claimed in claim 3, wherein the image display unit is arranged between the directional backlight unit and the light valve liquid crystal unit, the directional backlight unit comprises a left eye light source for projecting light to the left eye and a right eye light source for projecting light to the right eye, and the light projected by the left eye light source or the right eye light source passes through the image display unit and the light valve liquid crystal unit in sequence to form a left eye image or a right eye image.

6. The light valve liquid crystal based directional backlight naked eye 3D display device as claimed in claim 4 or 5, wherein the light valve liquid crystal unit is attached to one side of the image display unit.

7. The light valve liquid crystal based directional backlight naked eye 3D display device as claimed in claim 4 or 5, wherein the light valve liquid crystal cell and the image display unit are parallel and have a preset gap.

8. A directional backlight naked eye 3D display method based on light valve liquid crystal is characterized by comprising the following steps:

completing image refreshing in a display area of the image display unit, and continuously refreshing an image in the display area of the image display unit, in which the image refreshing is not completed;

the driving unit controls the directional backlight unit to emit light and controls a light transmission area corresponding to the display area which finishes the image refreshing to be opened so as to project an image.

9. The light valve liquid crystal-based directional backlight naked-eye 3D display method of claim 8, wherein when a display area of the image display unit completes image refreshing, the step of opening a light-transmitting area corresponding to the display area to project an image comprises:

after the left-eye image is refreshed in the display area of the image display unit, the light-transmitting area corresponding to the display area is opened and the other light-transmitting areas are closed for shading, so that the light emitted by the left-eye light source pointing to the backlight unit projects the left-eye image displayed in the display area through the display area and the light-transmitting area corresponding to the display area;

after the next display area refreshes the left eye image, the light transmission area corresponding to the display area is opened and the other light transmission areas are closed to shield light so as to project the left eye image displayed by the display area, and meanwhile, the other display areas of the image display unit continue to refresh the image.

10. The light valve liquid crystal-based directional backlight naked-eye 3D display method of claim 8, wherein when a display area of the image display unit completes image refreshing, the step of opening a light-transmitting area corresponding to the display area to project an image comprises:

after the right eye image is refreshed in the display area of the image display unit, the light-transmitting area corresponding to the display area is opened and other light-transmitting areas are closed for shading, so that the right eye image displayed in the display area is projected by light emitted by a right eye light source pointing to the backlight unit through the display area and the light-transmitting area corresponding to the display area;

after the next display area refreshes the right eye image, the light-transmitting area corresponding to the display area is opened, and the other light-transmitting areas are closed for shading so as to project the right eye image displayed by the display area, and meanwhile, the other display areas of the image display unit continue to refresh the image.

Technical Field

The invention belongs to the field of 3D display, and particularly relates to a pointing backlight naked eye 3D display device and method.

Background

The technical principle of directional backlight naked-eye 3D is to alternately transmit a left-eye image and a right-eye image displayed on a liquid crystal screen to the left eye and the right eye of an observer in a time division manner using a backlight system having directivity. When the left eye image is displayed on the liquid crystal screen, the backlight system turns on the light source corresponding to the left eye of the observer, and when the right eye image is displayed on the liquid crystal screen, the backlight system turns on the light source corresponding to the right eye of the observer. When the left-eye image and the right-eye image having parallax are rapidly alternated, the observer can see a 3D image.

However, the directional backlight naked-eye 3D display technology requires that the liquid crystal screen must alternately refresh left and right eye images with parallax rapidly at a refresh rate of 100Hz or more, which requires that the liquid crystal screen must have an extremely fast response time. If the response time of the liquid crystal screen is too slow, the left and right eye images will not respond sufficiently when they are alternately refreshed.

Fig. 1 is a schematic diagram of refresh setup time of a conventional naked-eye 3D display. Limited by the production technology of the liquid crystal screen, the response time of the existing liquid crystal screen can only reach about 5ms generally. The display image of the liquid crystal display is refreshed line by line, as shown in fig. 1, taking a refresh rate of 120Hz as an example, the refresh establishment time from the refreshing of the pixels in the first line of the left image of the screen to the opening of the left-eye light source is 6ms, and the pixels in the area can fully respond; and the refresh establishment time from the refreshing of the last row pixels of the left image of the screen to the turning on of the left-eye light source is only about 1ms, the pixels in the area cannot fully respond, at the moment, the left eye of an observer can see the residual image of the right eye, the right eye can also see the residual image of the left eye, and a more serious refresh crosstalk image can be generated. When the crosstalk ratio is too large, the viewer may see image ghosting or even a fused 3D image.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a directional backlight naked-eye 3D display device and method based on light valve liquid crystal, so as to solve the problem of refresh crosstalk caused by too slow response of an image display unit.

The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme. According to the invention, the directional backlight naked eye 3D display device based on the light valve liquid crystal comprises:

a directional backlight unit for providing a backlight;

the light valve liquid crystal unit comprises a plurality of light transmitting areas, and when the light transmitting areas are in an open state, light penetrates through the light transmitting areas of the light valve liquid crystal unit; when the light-transmitting area is in a closed state, the light is shielded by the light-transmitting area of the light valve liquid crystal unit;

the image display unit comprises a plurality of display areas for displaying images, and the display areas correspond to the light-transmitting areas one by one;

the driving unit is respectively connected with the directional backlight unit, the light valve liquid crystal unit and the image display unit and is used for controlling the directional backlight unit to be turned on or turned off and controlling the light-transmitting area and the display area corresponding to the light-transmitting area to be refreshed synchronously;

after a display area of the image display unit finishes image refreshing, the driving unit controls the directional backlight unit to emit light and controls the light-transmitting unit corresponding to the display area to be opened so as to project an image, and meanwhile, the display area which does not finish image refreshing is controlled to continue refreshing the image.

According to the directional backlight naked-eye 3D display device based on the light valve liquid crystal, the light transmitting areas are arranged in the light valve liquid crystal unit in a matrix mode and comprise at least one row or at least one column of light transmitting areas.

According to the light valve liquid crystal-based directional backlight naked-eye 3D display device, the display areas are arranged in the image display unit in a matrix mode and comprise at least one row or at least one column of display areas.

According to the directional backlight naked-eye 3D display device based on the light valve liquid crystal, the light valve liquid crystal unit is arranged between the directional backlight unit and the image display unit, the directional backlight unit comprises a left eye light source used for projecting light to a left eye and a right eye light source used for projecting light to a right eye, and the light projected by the left eye light source or the right eye light source sequentially passes through the light valve liquid crystal unit and the image display unit to form a left eye image or a right eye image.

According to the directional backlight naked-eye 3D display device based on the light valve liquid crystal, the image display unit is arranged between the directional backlight unit and the light valve liquid crystal unit, the directional backlight unit comprises a left eye light source used for projecting light to a left eye and a right eye light source used for projecting light to a right eye, and the light projected by the left eye light source or the right eye light source sequentially passes through the image display unit and the light valve liquid crystal unit to form a left eye image or a right eye image.

According to the directional backlight naked-eye 3D display device based on the light valve liquid crystal, the light valve liquid crystal unit is attached to one side of the image display unit.

According to the directional backlight naked-eye 3D display device based on the light valve liquid crystal, the light valve liquid crystal unit and the image display unit are parallel and have a preset gap.

The invention provides a pointing backlight naked-eye 3D display method based on light valve liquid crystal, which comprises the following steps of:

completing image refreshing in a display area of the image display unit, and continuously refreshing an image in the display area of the image display unit, in which the image refreshing is not completed;

the driving unit controls the directional backlight unit to emit light and controls a light transmission area corresponding to the display area which finishes the image refreshing to be opened so as to project an image.

According to the light valve liquid crystal-based pointing backlight naked-eye 3D display method, when a display area of an image display unit finishes image refreshing, a light-transmitting area corresponding to the display area is opened to project an image, and the method comprises the following steps:

after the left-eye image is refreshed in the display area of the image display unit, the light-transmitting area corresponding to the display area is opened and the other light-transmitting areas are closed for shading, so that the light emitted by the left-eye light source pointing to the backlight unit projects the left-eye image displayed in the display area through the display area and the light-transmitting area corresponding to the display area;

after the next display area refreshes the left eye image, the light transmission area corresponding to the display area is opened and the other light transmission areas are closed to shield light so as to project the left eye image displayed by the display area, and meanwhile, the other display areas of the image display unit continue to refresh the image.

According to the light valve liquid crystal-based pointing backlight naked-eye 3D display method, when a display area of an image display unit finishes image refreshing, a light-transmitting area corresponding to the display area is opened to project an image, and the method comprises the following steps:

after the right eye image is refreshed in the display area of the image display unit, the light-transmitting area corresponding to the display area is opened and other light-transmitting areas are closed for shading, so that the right eye image displayed in the display area is projected by light emitted by a right eye light source pointing to the backlight unit through the display area and the light-transmitting area corresponding to the display area;

after the next display area refreshes the right eye image, the light-transmitting area corresponding to the display area is opened, and the other light-transmitting areas are closed for shading so as to project the right eye image displayed by the display area, and meanwhile, the other display areas of the image display unit continue to refresh the image.

By means of the technical scheme, the invention has the following advantages and beneficial technical effects:

the pointing backlight naked-eye 3D display device and method based on the light valve liquid crystal control the light to pass or shield through the opening or closing of the light valve liquid crystal unit, because the light transmission areas of the light valve liquid crystal unit correspond to the display areas of the image display unit one by one, in the display process, the corresponding light transmission areas can be opened for projection after the display areas finish image refreshing, and the non-projected display areas can sequentially continue refreshing the next image under the shielding of the light transmission areas of the light valve liquid crystal unit, so that the refreshing establishment time of the display image of each display area can be prolonged, and the screen refreshing crosstalk caused by too slow response time of an image display liquid crystal screen in a pointing backlight naked-eye 3D display system can be effectively reduced.

Drawings

Fig. 1 is a schematic diagram of refresh setup time of a conventional naked-eye 3D display.

Fig. 2 is a schematic structural diagram of a directional backlight naked-eye 3D display device based on light valve liquid crystal in embodiment 1.

Fig. 3 is a schematic structural diagram of a directional backlight naked-eye 3D display device based on light valve liquid crystal in embodiment 2.

FIG. 4 is a flow chart of a directional backlight naked-eye 3D display method based on light valve liquid crystal.

Fig. 5 is a schematic diagram of refresh set-up time of a directional backlight naked-eye 3D display device based on light valve liquid crystal.

In the figure:

10-a drive unit; 20-a directional backlight unit; 30-a light valve liquid crystal cell; 31 — a first light transmitting area; 32-a second light transmitting area; 33-a third light transmitting area; 40-an image display unit; 41-a first display area; 42-a second display area; 43-third display area.

Detailed Description

The invention discloses a directional backlight naked eye 3D display device and a method based on light valve liquid crystal, wherein the directional backlight naked eye 3D display device comprises: a directional backlight unit including a left-eye light source and a right-eye light source; a light valve liquid crystal cell including a plurality of light transmissive regions; an image display unit including a plurality of display areas; a drive unit; when the display area displays the left eye image, light rays pass through the light-transmitting area and the display area of the light-transmitting area to form the left eye image; when the display area displays the right eye image, light passes through the light-transmitting area and the display area of the light-transmitting area to form the right eye image.

In the display process, the image display unit refreshes the left eye image or the right eye image according to the setting of the display area, so that the screen refreshing crosstalk caused by too slow response time of an image display liquid crystal screen in a directional backlight naked eye 3D display system can be effectively reduced.

The present invention will be described in more detail below with reference to specific preferred embodiments and drawings, but the present invention is not limited to the following embodiments.

Example 1

Fig. 2 is a schematic structural diagram of a directional backlight naked-eye 3D display device based on light valve liquid crystal in embodiment 1. As shown in fig. 2, the light valve liquid crystal-based directional backlight naked-eye 3D display device includes a driving unit 10, a directional backlight unit 20, a light valve liquid crystal unit 30, and an image display unit 40.

The driving unit 10 includes a control chip, a driving chip and related circuits, and is connected to the directional backlight unit 20, the light valve liquid crystal unit 30 and the image display unit 40, and is used for controlling and driving the directional backlight unit 20 to emit light or to turn off, and controlling the light transmission or shielding of the light valve liquid crystal unit 30 and the image display unit 40 to refresh the left-eye image or the right-eye image.

The directional backlight unit 20 is used for projecting light, providing a backlight source for a display, forming a left-eye image at a left eye of an observer, forming a right-eye image at a right eye, and generating a viewing effect of naked-eye 3D display by alternately displaying the left-eye image and the right-eye image. Specifically, the directional backlight unit includes a left-eye light source for projecting light toward a left eye of a viewer to form a left-eye image and a right-eye light source for projecting light toward a right eye of the viewer to form a right-eye image. The left eye light source and the right eye light source are independently turned on and off, and when the left eye light source is turned on and the right eye light source is turned off, only the left eye of an observer can see light; while the left eye light source is off and the right eye light source is on, only the right eye of the observer sees the light.

The light valve liquid crystal cell 30 is substantially a flat plate structure and is made of a light valve liquid crystal material. The light valve liquid crystal can control the light transmission state by voltage, and comprises a front polarizer, a rear polarizer, a front ITO conductive glass, a rear ITO conductive glass and a liquid crystal material. The light transmission state of the light valve liquid crystal can be changed by applying a voltage on the light valve liquid crystal. Moreover, various patterns can be etched on the ITO film (i.e. ITO conductive glass) of the glass substrate, so that the light valve liquid crystal can display various patterns. In the present embodiment, the light valve liquid crystal cell 30 is disposed between the directional backlight unit 20 and the image display unit 40, and includes N (N is greater than or equal to 2) light-transmitting regions.

As an example, in the embodiment shown in fig. 2, the light valve liquid crystal cell 30 comprises 3 light transmissive regions: a first light-transmitting region 31, a second light-transmitting region 32, and a third light-transmitting region 33, thereby dividing light emitted from the backlight direction unit into 3 light-emitting regions that can be independently controlled. The light-transmitting area can be opened or closed, and when the light-transmitting area is in an open state, light passes through the light-transmitting area of the light valve liquid crystal unit 30; when the light-transmitting area is in the closed state, the light is blocked by the light-transmitting area of the light valve liquid crystal cell 30.

The image display unit 40 is a liquid crystal display panel having a substantially flat panel shape, and is capable of refreshing and displaying a left-eye image or a right-eye image. The image display unit 40 includes N (N is greater than or equal to 2) display regions for displaying the left-eye image or the right-eye image, and the display regions correspond to the light-transmitting regions.

As an example, in the embodiment shown in fig. 2, the image display unit 40 contains 3 display areas: a first display area 41, a second display area 42 and a third display area 43. The first display area 41 corresponds to the first transparent area 31, and the two areas are refreshed synchronously, that is, when the first display area 41 displays an image, the first transparent area 31 is turned on to transmit light, and the other transparent areas are turned off. The second display region 42 corresponds to the second transparent region 32, and the two regions are refreshed synchronously, that is, when the second display region 42 displays an image, the second transparent region 32 is turned on to transmit light, and the other transparent regions are turned off. The third display area 43 corresponds to the third transparent area 33, and the two areas are refreshed synchronously, that is, when the third display area 43 displays images, the third transparent area 33 is turned on to transmit light, and the other transparent areas are turned off.

In operation, after the first display region 41 of the image display unit 40 is refreshed, the first light-transmitting region 31 of the light valve liquid crystal cell 30 is opened for transmitting light, and the other light-transmitting regions are closed for blocking light. After the second display region 42 of the image display unit 40 is refreshed, the second light-transmitting region 32 of the light valve liquid crystal cell 30 is opened to transmit light, and the other light-transmitting regions are closed to block light. After the refresh of the third display region 43 of the image display unit 40 is completed, the third light-transmitting region 33 of the light valve liquid crystal cell 30 is opened to transmit light, and the other light-transmitting regions are closed to block light.

Example 2

Fig. 3 is a schematic structural diagram of a directional backlight naked-eye 3D display device based on light valve liquid crystal in embodiment 2. The present embodiment is different from embodiment 1 in that the image display unit 40 is disposed between the directional backlight unit and the light valve liquid crystal unit 30, that is, the light valve liquid crystal unit 30 in embodiment 1 is disposed behind the image display unit 40 (with the direction toward the viewer as front and the direction away from the viewer as rear), and the light valve liquid crystal unit 30 in embodiment 2 is disposed in front of the image display unit 40.

As shown in fig. 3, the light valve liquid crystal cell 30 is disposed in front of the image display unit 40. The light valve liquid crystal 3 is divided into 3 light-transmitting regions, which divide the light emitted from the backlight system 2 into 3 horizontal regions, and the image display unit 40 is used for displaying an image source. As an example, the image display unit 40 includes 3 display areas corresponding to the light valve liquid crystal cell 30: a first display area 41 (i.e., display area 1), a second display area 42 (i.e., display area 2), and a third display area 43 (i.e., display area 3). Similarly, the light valve liquid crystal cell 30 includes 3 light transmissive regions: a first light transmission region 31 (i.e., light transmission region 1), a second light transmission region 32 (i.e., light transmission region 2), and a third light transmission region 33 (i.e., light transmission region 3). The first light-transmitting region 31 corresponds to the first display region 41, the second light-transmitting region 32 corresponds to the second display region 42, and the third light-transmitting region 33 corresponds to the third display region 43.

In operation, after the first display region 41 of the image display unit 40 is refreshed, the first light-transmitting region 31 of the light valve liquid crystal cell 30 is opened for transmitting light, and the other light-transmitting regions are closed for blocking light. After the second display region 42 of the image display unit 40 is refreshed, the second light-transmitting region 32 of the light valve liquid crystal cell 30 is opened to transmit light, and the other light-transmitting regions are closed to block light. After the third display area 43 of the image display unit 40 is refreshed, the third light-transmitting area 33 of the light valve liquid crystal unit 30 is opened for transmitting light, and the other light-transmitting areas are closed for blocking light, and so on.

The following describes in detail a display method implemented by the directional backlight naked-eye 3D display device based on the light valve liquid crystal provided in the above embodiments.

Fig. 4 is a flowchart of a directional backlight naked-eye 3D display method based on light valve liquid crystal, as shown in fig. 4, the display method includes a left-eye image display process S10 and a right-eye image display process S20. The left eye image display process and the right eye image display process are alternately and circularly implemented, so that a viewer obtains a naked eye 3D display effect.

The left eye image display process S10 includes steps S11 to S16. In this embodiment, the image display unit 40 and the light valve liquid crystal unit 30 are divided into three regions as an example, but in other embodiments, the image display unit 40 and the light valve liquid crystal unit 30 may be divided into other number of regions, and a person skilled in the art may set the number and arrangement structure of the display region and the light transmission region as needed, which is not limited in this application.

In step S11, the first display region 41 of the image display unit 40 finishes refreshing the display content of the left-eye image in the first display region 41. Then, in step S12, the first display region 41 of the light valve liquid crystal cell 30 is turned on to transmit light, and the other display regions (i.e., the second display region 42 and the third display region 43) are turned off, so that the light projected by the left-eye light source can be transmitted only from the first display region 41.

In step S13, the display content of the left-eye image in the second display area 42 is completely refreshed in the second display area 42. Then, in step S13, the second display region 42 of the light valve liquid crystal cell 30 is turned on to transmit light, and the other display regions (i.e., the first display region 41 and the third display region 43) are turned off, so that the light projected by the left-eye light source can be transmitted only from the second display region 42.

In step S15, the display content of the left-eye image in the third display area 43 is completely refreshed in the third display area 43. Then, in step S16, the third display region 43 of the light valve liquid crystal cell 30 is turned on to transmit light, and the other display regions (i.e., the first display region 41 and the second display region 42) are turned off, so that the light projected by the left-eye light source can be transmitted only from the third display region 43.

In this way, the projection of the left-eye image on the left eye is completed in steps S11 to 16. Similarly, the projection process of the right-eye image is similar to the projection process of the left-eye image, and the projection of the right-eye image on the right eye is completed through steps S21-26, which is not repeated herein.

Fig. 5 is a schematic diagram of refresh set-up time of a directional backlight naked-eye 3D display device based on light valve liquid crystal. As shown in fig. 5, as an example, taking the refresh rate of the image display unit 40 as 120Hz, the period of one frame of image is 1/120ms, i.e., about 8.3ms, with the image refresh time set to 6 ms. If the screen of the whole image display unit is divided into N display areas, the pixel line number corresponding to each display area is 1/N of the vertical resolution of the screen, and the refresh time corresponding to each display area is (6/N) ms.

Specifically, as shown in fig. 5, the refresh setup time from the refresh of the first row of the display area 1 to the transmission of the light transmission area 1 is 6ms, and the refresh time from the refresh of the whole image of the display area 1 is 6/N, so the refresh setup time from the refresh of the last row of the display area 1 to the transmission of the light transmission area 1 is (6-6/N) ms. After the display area 1 finishes image refreshing, the corresponding light-transmitting area 1 is opened to transmit light to project an image, and the other light-transmitting areas (i.e. the light-transmitting area 2 and the light-transmitting area 3) are closed to shield light, so that the display device only projects the image displayed in the display area 1.

While display area 1 projects the image, the other display areas continue to refresh the image. As shown in fig. 5, after the display area 1 finishes refreshing the image (i.e. the display area 1 finishes refreshing the last line), the display area 2 starts to display the refresh of the first line, similarly, the time from the refresh of the first line of the display area 2 to the light-transmitting opening of the light-transmitting area 2 is 6ms, and the time from the refresh of the display area 2 to the refresh of the whole image is 6/N, so the refresh establishing time from the refresh of the last line of the display area 2 to the light-transmitting area 2 is (6-6/N) ms. After the display area 2 finishes image refreshing, the corresponding light-transmitting area 2 is turned on to transmit light to project an image, and the other light-transmitting areas (i.e. the light-transmitting area 1 and the light-transmitting area 3) are turned off to shield light, so that the display device only projects the image displayed in the display area 2.

Similarly, the refresh establishing time from the refreshing of the first row of the display area N to the light transmission of the light transmission area N is 6ms, and the refresh establishing time from the refreshing of the last row of the display area N to the light transmission of the light transmission area N is (6-6/N) ms.

As can be seen from a comparison of fig. 1, in the prior art, the worst refresh setup time (i.e., the last row refresh setup time) of the entire system is 1 ms. In the display device provided by the disclosure, the worst refresh set-up time of the whole system is increased to (6-6/N) ms, taking N as an example and N as 3, and the worst refresh set-up time of the system is 6-6/3 as 4 ms. Therefore, the display device provided by the disclosure can effectively reduce screen refreshing crosstalk caused by too slow response time of an image display liquid crystal screen in a directional backlight naked-eye 3D display system.

In a word, the directional backlight naked-eye 3D display device and the method based on the light valve liquid crystal control light pass or shield through the light valve liquid crystal unit or close, because the light transmission areas of the light valve liquid crystal unit correspond to the display areas of the image display unit one by one, in the display process, the corresponding light transmission areas can be opened for projection after the display areas complete image refreshing, and the non-projected display areas can sequentially and synchronously continue refreshing of the next image under the shielding of the light transmission areas of the light valve liquid crystal unit, so as to realize alternate refreshing and display, for example, after the image refreshing of the display area 1 is completed, only the corresponding light transmission area 1 transmits light, other non-refreshed display areas are in a shielding state, after the image refreshing of each display area is completed, the corresponding light transmission area can be opened for projection without waiting for the projection after the refreshing of the whole image display unit is completed, therefore, the refreshing establishing time of the display image of each display area can be prolonged, and the screen refreshing crosstalk caused by too slow response time of an image display liquid crystal screen in a directional backlight naked-eye 3D display system is effectively reduced.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.