CN109613709B - Directional display device based on two LCD screens - Google Patents
Directional display device based on two LCD screens Download PDFInfo
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- CN109613709B CN109613709B CN201910073845.6A CN201910073845A CN109613709B CN 109613709 B CN109613709 B CN 109613709B CN 201910073845 A CN201910073845 A CN 201910073845A CN 109613709 B CN109613709 B CN 109613709B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/34—Stereoscopes providing a stereoscopic pair of separated images corresponding to parallactically displaced views of the same object, e.g. 3D slide viewers
- G02B30/36—Stereoscopes providing a stereoscopic pair of separated images corresponding to parallactically displaced views of the same object, e.g. 3D slide viewers using refractive optical elements, e.g. prisms, in the optical path between the images and the observer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/22—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type
- G02B30/25—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type using polarisation techniques
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/27—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
Abstract
The invention discloses a directional display device based on double liquid crystal screens. The directional display device includes: the liquid crystal backlight source comprises a 2D backlight source and a first liquid crystal screen, wherein a plurality of sub-pixels in the first liquid crystal screen form a backlight luminous element; the optical film layer is used for directionally refracting light rays emitted by the backlight luminous element of the first liquid crystal screen to form a visual area; the second liquid crystal screen is used for displaying; a processor for performing the steps of: loading the gray level images corresponding to all the visual area positions to form a backlight image library; and tracking and determining the space positions of visual areas where the two eyes of the viewer are positioned, extracting corresponding gray-scale images from the backlight image library, loading the images of the corresponding visual areas into the first liquid crystal screen, starting the corresponding backlight luminous elements, and projecting the left and right images of the second liquid crystal screen to the left and right eyes of the viewer respectively, thereby realizing the directional display function.
Description
Technical Field
The invention relates to the technical field of directional display, in particular to a directional display device based on double liquid crystal screens.
Background
With the development of display technology, directional display technology has also emerged. Through the directive display technology, the spatial position information of the viewer, the human eyes and other characteristics are locked, the images of the visual areas where the left eye and the right eye are located can be alternately opened, the separation of the left eye image and the right eye image can be realized, the left eye image enters the left eye, the right eye image enters the right eye to generate a three-dimensional effect, the viewer can view a 3D image, the limitation of conventional plane display is broken, and the directive display technology is paid much attention in recent years.
In the aspect of researching a thin system, the backlight source of the directional display device adopted in the market at the present stage still adopts the traditional LED lamp array, and the parameter specification of the optical system shows that the device needs the intensive small-sized LED lamp array with a considerable scale, so that the device and the processing cost are greatly increased, and the device is not beneficial to large-scale production and application in the market.
Except the shortcoming of high cost of the directional display technology at present, the high technical requirement on the precision control mode of the intensive backlight source is the problem to be solved urgently by the directional display technology, compared with the LED matrix backlight scheme, the liquid crystal display backlight scheme does not need a large number of LEDs, only the requirements of refreshing and backlight brightness need to be met, the cost is relatively low, and meanwhile, compared with the control mode of the liquid crystal backlight source, the control mode of the intensive LED backlight source is much lower in technical development difficulty and has operability and practicability.
Disclosure of Invention
The invention aims to provide a directional display device based on double liquid crystal screens, which can realize a directional display function.
A directional display device based on dual liquid crystal screens comprises:
the liquid crystal backlight source is used as backlight and comprises a normally bright 2D light source and a first liquid crystal screen, wherein a color filter is removed from the first liquid crystal screen, a colorless sub-pixel is used as a control unit, a plurality of sub-pixels form a backlight luminous element, the gray level diagram of a special pattern is loaded on the first liquid crystal screen to control the on-off and gray level values of the sub-pixels at different positions, so that the position and light intensity distribution curve of the backlight luminous element are controlled, and the black-white contrast of the sub-pixels in the backlight luminous element is greater than or equal to 1: 1000, parts by weight;
the optical film layer is a film layer with a precise periodic structure, and is positioned behind the first liquid crystal screen, and light rays emitted by the backlight light-emitting element of the first liquid crystal screen are directionally refracted through the Fresnel lens to form a visual area;
the second liquid crystal screen is used for displaying and is arranged on the side surface, far away from the first liquid crystal screen, of the optical film layer in parallel, the light emitted by the backlight luminescent element of the first liquid crystal screen directionally projects a display image of the second liquid crystal screen into a visual area under the action of the optical film layer, the polarization direction of the polarizer on the light emitting side of the first liquid crystal screen is parallel to the polarization direction of the polarizer on the light entering side of the second liquid crystal screen, and the first liquid crystal screen and the second liquid crystal screen are refreshed synchronously;
a processor for performing the steps of:
finding the positions and the number of the correspondingly started backlight luminous elements, recording the positions and the light intensity distribution curves of the backlight luminous elements corresponding to all the visual area positions, recording the sub-pixel positions, the number and the gray values of the corresponding backlight luminous elements, generating the gray level images of specific patterns according to the sub-pixel positions, the number and the gray values, and loading the gray level images corresponding to all the visual area combinations to form a backlight image library;
tracking and locking the space positions of visual areas where the two eyes of a viewer are located, extracting gray level images corresponding to the visual areas where the left eye and the right eye of the viewer are located from the backlight image library according to the space positions of the visual areas where the two eyes are located, then controlling the first liquid crystal screen to alternately refresh the gray level images of the visual areas where the left eye and the right eye are located according to time division, and simultaneously controlling the second liquid crystal screen to synchronously refresh the images corresponding to the left eye and the right eye, so that the left image and the right image of the second liquid crystal screen are respectively projected to the left eye and the right eye of the viewer in an oriented mode.
Preferably, when the left and right images of the second liquid crystal screen are projected to the left and right eyes of the viewer in a directional manner, the viewer can view the 3D picture.
Preferably, the liquid crystal display further comprises a light guide layer, and the light guide layer is arranged between the first liquid crystal display and the optical film layer in a laminated mode.
Preferably, the light guide layer is air, and the optical film layer is a fresnel lens or a Lenticular (Lenticular).
Preferably, during the display process, the refreshing of the gray scale map in the first liquid crystal panel and the refreshing of the image of the second liquid crystal panel may not be synchronized, and at any display time, the refreshing of the gray scale map at the next time has already been started by the first liquid crystal panel before the refreshing of the display pattern of the second liquid crystal panel at the next time.
Preferably, the first liquid crystal screen forms a viewing zone with the optical film layer, while the processor has a tracking module for tracking the position of the eyes of the observer.
Preferably, the processor is further configured to screen out a visual area range according to the tracking module, and when it is detected that both eyes of the viewer are outside the visual area range, the first liquid crystal screen loads a gray scale map with the same gray scale value for all sub-pixels, and the second liquid crystal screen refreshes the display image, or the first liquid crystal screen and the second liquid crystal screen stop refreshing.
Preferably, the first liquid crystal panel may independently adjust a gray level of each sub-pixel to perform brightness control on a corresponding backlight emitting element, and the shape of the backlight emitting element may be a vertical stripe or an oblique stripe. .
Preferably, the refresh frequency of the first liquid crystal screen and the second liquid crystal screen is at least 120 Hz.
Preferably, the first liquid crystal screen may also use pixels as a control unit.
Compared with the prior art, the directional display device based on the double liquid crystal screens provided by the invention provides directional display on the premise of very thin system thickness. The directional display device can directionally project left and right eye images corresponding to the observer to the left and right eyes of the observer, so that the observer can observe a 3D image with high brightness, low crosstalk and full resolution.
In addition, the liquid crystal backlight does not need to use a large number of LEDs, the cost is relatively lower, and compared with an intensive LED backlight control mode, the control mode of the liquid crystal backlight is much lower in technical development difficulty, and has higher operability and practicability. The sub-pixels are used as a control unit of backlight, have extremely high control precision and reach the hundred-micron level, so that the switching between visual areas formed by the display device is more continuous, and a viewer cannot perceive the brightness change of the switching of the visual areas.
In terms of device assembly production, the liquid crystal backlight structure which is highly integrated enables the assembly cost and technical requirements of the display device to be obviously reduced.
Drawings
FIG. 1 is a schematic diagram of a directional display device based on two liquid crystal panels and forming a binocular vision region;
FIG. 2a is a front view of the arrangement and display effect of the sub-pixels turned on when the backlight emitting element is in the shape of a vertical bar;
FIG. 2b is a schematic view of a three-dimensional structure of the arrangement and display effect of sub-pixels turned on when the backlight light-emitting element is in a vertical strip shape;
FIG. 3a is a front view of the arrangement and display effect of the sub-pixels turned on when the backlight emitting device is in the form of oblique stripes;
FIG. 3b is a schematic view of a three-dimensional structure of the arrangement and display effect of sub-pixels turned on when the backlight light-emitting element is in the form of an oblique strip;
FIG. 4 is a flow chart of the operation of the directional display device based on dual liquid crystal screens to realize the directional display function;
in the figure:
11: a liquid crystal backlight source; 111: a 2D backlight; 112: a first liquid crystal panel; 12: a light guide layer; 13: an optical film layer; 14: a second liquid crystal panel; 15: the oblique strip backlight light-emitting element; 16: a vertical strip backlight light emitting element; 101: a first visual area; 102 view zone two.
Detailed Description
So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. In addition, the embodiments and features of the embodiments of the present application may be combined with each other without conflict. In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention, and the described embodiments are merely a subset of the embodiments of the present invention, rather than a complete embodiment. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
In some embodiments, a viewport is required to be divided. For the occupied space position size of a viewer, a certain floating visual range is reserved after the space size is accurate, so that the viewer with different body types can see specific picture content in the specific visual range.
Fig. 1 is a schematic structural diagram of a directional display device based on a dual liquid crystal panel. As shown in fig. 1, the directional display device based on the dual liquid crystal panels sequentially includes a liquid crystal backlight 11, a light guide layer 12, an optical film layer 13, and a second liquid crystal panel 14, which are stacked.
The liquid crystal backlight source 11 is used as a backlight module for backlight, the liquid crystal backlight source 11 includes a normally-bright 2D backlight source 111 and a first liquid crystal panel 112, two sides of the first liquid crystal panel 112 are respectively provided with a polarizer, and the first liquid crystal panel 112 is used for refreshing the liquid crystal backlight source according to time division. The color filter is removed from the first liquid crystal panel 112. The sub-pixels constitute the backlight emitting unit 15 (or 16), and in this embodiment, the first liquid crystal panel 112 includes the backlight emitting unit constituted by the sub-pixels, and the sub-pixels are used as control units, and the sub-pixels form the backlight emitting unit. The gray scale map of the special pattern is loaded on the first liquid crystal panel 112 to control the on-off and gray scale values of the sub-pixels at different positions, thereby controlling the position of the backlight luminous element and the light intensity distribution curve. The black-white contrast ratio of the black-white sub-pixels of the backlight luminous element is more than or equal to 1: 1000.
in some embodiments, the backlight light emitting unit may be a vertical bar or an oblique bar. When the backlight emitting element is a vertical bar, the arrangement and display effect of the turned-on sub-pixels of the first liquid crystal panel 112 are as shown in fig. 2a and 2b, and when the backlight emitting element is an oblique bar, the arrangement and display effect of the turned-on sub-pixels of the first liquid crystal panel 112 are as shown in fig. 3a and 3 b.
In this embodiment, the luminance distribution curve of the backlight emitting elements of the first liquid crystal panel 112 can be adjusted and controlled by independently adjusting the gray scale of each sub-pixel in the backlight emitting elements, so that the display luminance on the second liquid crystal panel is more uniform, and the display effect is ensured.
The light guide layer 12 is stacked between the first liquid crystal panel 112 and the optical film layer 13. In some embodiments, light guiding layer 12 is an air film layer, and its refractive index may be almost ignored.
The optical film layer 13 has a precise periodic structure, is stacked with the first liquid crystal panel 112, and is configured to perform directional refraction on light rays emitted by different backlight light-emitting elements 15 of the first liquid crystal panel 112, so as to form the binocular vision zones 101 and 102 that are not interfered with each other. In some embodiments, the lens film layer is a fresnel lens or a Lenticular (lenticulars).
The second liquid crystal panel 14 is disposed in parallel on a side of the optical film layer 13 away from the first liquid crystal panel 112, and two polarizing plates are disposed on two sides of the second liquid crystal panel 14. The second liquid crystal panel 14 functions as a display panel. The polarization direction of the polarizer on the light emitting side of the first liquid crystal panel 112 is parallel to the polarization direction of the polarizer on the light incident side of the second liquid crystal panel 14, and the first liquid crystal panel 112 and the second liquid crystal panel 14 are refreshed synchronously, and the refreshing frequency is preferably 120 Hz.
In this embodiment, the directional display device based on the dual liquid crystal screens further comprises a tracking module, and the tracking module is used for tracking and positioning human body features of an observer, such as the positions of eyes. The algorithm loaded by the tracking module can have a human eye tracking function, and meanwhile, the position of a viewer can be intelligently locked to correspondingly open a visual area by combining high-speed tracking response of a pre-judging mechanism, so that the spatial position viewed by the viewer can be accurately determined.
In addition, the directional display device based on the double liquid crystal screens further comprises a memory and a controller, wherein the memory stores a backlight image library and a computer program related to the directional display function. If the viewer is at a certain position of the directional display area, the processor calls the gray-scale maps at corresponding positions in the loaded backlight image library according to the position information of the two eyes of the viewer, which is obtained by the tracking module, controls the first liquid crystal screen 112 to alternately refresh the gray-scale maps of the visual areas where the left and right eyes are located, and simultaneously controls the second liquid crystal screen 14 to synchronously refresh the images corresponding to the left and right eyes, so that the left and right images of the second liquid crystal screen 14 are respectively and directionally projected to the left and right eyes of the viewer, when the change of the spatial positions of the visual areas where the two eyes of the viewer are located is detected, the gray-scale map loaded by the first liquid crystal screen is changed, the images corresponding to the left and right eyes are continuously and synchronously refreshed by the second liquid crystal screen, and the two liquid crystal screens still keep a synchronous refreshing state, so that.
In some embodiments, the refreshing of the gray scale map in the first lcd panel 112 and the refreshing of the image in the second lcd panel 14 may not be synchronized during the display process, and at any display time, the first lcd panel 112 may start the refreshing of the gray scale map at the next time before the refreshing of the display pattern of the second lcd panel 14 at the next time.
Fig. 4 is a flowchart of a directional display device based on dual liquid crystal panels to implement a directional display function. As shown in fig. 4, the processor executes the computer program described above to perform steps S401 to S403.
Step S401: before the directional display is normally turned on, a backlight image library needs to be established. The processor can find the positions and the number of the correspondingly opened backlight luminous elements 15 according to the visual area space positions of the directional display function range, record the positions and the light intensity distribution curves of the backlight luminous elements 15 corresponding to all the visual area positions, record the sub-pixel positions, the number and the gray values of the corresponding backlight luminous elements 15, generate the gray level images of specific patterns according to the sub-pixel positions, the number and the gray level values, and load the gray level images corresponding to all the visual area combinations to form a backlight image library.
Specifically, the processor controls to turn on three rows of sub-pixels of the first lcd 112 to form a backlight source, and the backlight source is equipped with the optical structures (the light guide layer 12, the optical film layer 13, and the second lcd 14) to form a test viewing area.
Then, the first liquid crystal panel 112 may sequentially open 3 rows of sub-pixels (i.e., turn on the backlight emitters) from left to right, where the step length is one sub-pixel, form a required test viewing area when viewing different viewing distances, record a position of the test viewing area formed at this time, and record a position of the sub-pixel of the first liquid crystal panel 112 that is correspondingly opened.
And finally, according to the obtained corresponding relation between the positions of the 3 columns of sub-pixels and the positions of the test visual areas formed under different viewing distances, comprehensively considering the lens magnification and the actual visual area size as well as the display brightness uniformity on the second liquid crystal screen 14, considering the overlapping degree of the test visual areas, combining the rows of sub-pixels to form a plurality of backlight luminous elements, adjusting the gray value of the sub-pixels of the backlight luminous elements according to the display brightness uniformity on the second liquid crystal screen 14, and optimizing the brightness distribution curve of the backlight luminous elements, so that a gray level image is generated according to the positions of the final plurality of backlight luminous elements and the positions, the number and the gray level value of the sub-pixels of the backlight luminous elements to control backlight light emission. And loading the gray level images corresponding to all the actual visual areas to form a backlight image library.
Step S402: then, according to the positions of the two eyes of the viewer, the corresponding gray level images are called from the backlight image library, and the processor quickly responds to the two corresponding gray level images of the visual area positions of the two eyes and loads the two corresponding gray level images into the first liquid crystal screen 112.
Step S403: the first liquid crystal screen 112 is controlled to alternately refresh the gray level images of the visual areas where the left eye and the right eye are located, and simultaneously the second liquid crystal screen 14 is controlled to synchronously refresh the images corresponding to the left eye and the right eye, so that the left image and the right image of the second liquid crystal screen 14 are respectively projected to the left eye and the right eye of a viewer in an oriented mode, when the change of the spatial positions of the visual areas where the two eyes of the viewer are located is detected, the gray level image loaded by the first liquid crystal screen 112 is changed, the second liquid crystal screen 14 continuously and synchronously refreshes the images corresponding to the left eye and the right eye, and the two liquid crystal screens still keep a synchronous. In this embodiment, several columns of sub-pixels of the first liquid crystal panel 112 form a viewing area as a backlight emitting element.
In the device for realizing the directional display function by the double-liquid crystal screen scheme, the system with the tracking function calls the corresponding gray-scale map in the backlight image library according to the visual area positions of the eyes of the viewer, controls the turn-on of the corresponding backlight luminous element in the liquid crystal backlight source 11, and respectively projects the left image and the right image displayed by the second liquid crystal screen 14 to the left eye and the right eye of the viewer. The above description of the display process is an implementation manner of establishing a specific corresponding relationship between the backlight light-emitting element position of the directional display device and the viewing area and the operation of the directional display device. And calling corresponding gray-scale images from the system pattern library according to the spatial positions of the two eyes of the viewer at different angles and different distances in the visual area range, so that backlight luminous elements corresponding to the visual areas of the two eyes are turned on, and the directional display function of the system is realized.
It is to be understood that the present invention is not limited to the above-described embodiments, and that various changes and modifications may be made without departing from the spirit and scope of the invention, and it is intended to cover such changes and modifications as fall within the scope of the appended claims and equivalents thereof.
Claims (9)
1. A directional display device based on double liquid crystal screens is characterized by comprising:
the liquid crystal backlight source is used as backlight and comprises a normally bright 2D light source and a first liquid crystal screen, wherein a color filter is removed from the first liquid crystal screen, a colorless sub-pixel is used as a control unit, a plurality of sub-pixels form a backlight luminous element, the gray level diagram of a special pattern is loaded on the first liquid crystal screen to control the on-off and gray level values of the sub-pixels at different positions, so that the position and light intensity distribution curve of the backlight luminous element are controlled, and the black-white contrast of the sub-pixels in the backlight luminous element is greater than or equal to 1: 1000, parts by weight;
the optical film layer is a film layer with a precise periodic structure, and after the optical film layer is positioned behind the first liquid crystal screen, light rays emitted by a backlight light-emitting element of the first liquid crystal screen are subjected to directional refraction through the optical film layer to form a visual area;
the second liquid crystal screen is used for displaying and is arranged on the side surface, far away from the first liquid crystal screen, of the optical film layer in parallel, the display image of the second liquid crystal screen is directionally projected into a visual area through light rays emitted by the backlight light-emitting element of the first liquid crystal screen under the action of the optical film layer, and the polarization direction of the polarizer on the light-emitting side of the first liquid crystal screen is parallel to the polarization direction of the polarizer on the light-entering side of the second liquid crystal screen;
in the display process, the refreshing of the gray scale image in the first liquid crystal screen is asynchronous with the refreshing of the image of the second liquid crystal screen, and at any display moment, before the refreshing of the display pattern of the second liquid crystal screen at the next moment, the refreshing of the gray scale image of the first liquid crystal screen at the next moment is started;
a processor for performing the steps of:
finding the positions and the number of the correspondingly started backlight luminous elements, recording the positions and the light intensity distribution curves of the backlight luminous elements corresponding to all the visual area positions, recording the sub-pixel positions, the number and the gray values of the corresponding backlight luminous elements, generating the gray level images of specific patterns according to the sub-pixel positions, the number and the gray values, and loading the gray level images corresponding to all the visual area combinations to form a backlight image library;
tracking and locking the space positions of visual areas where the two eyes of a viewer are located, extracting gray level images corresponding to the visual areas where the left eye and the right eye of the viewer are located from the backlight image library according to the space positions of the visual areas where the two eyes are located, then controlling the first liquid crystal screen to alternately refresh the gray level images of the visual areas where the left eye and the right eye are located according to time division, and simultaneously controlling the second liquid crystal screen to synchronously refresh the images corresponding to the left eye and the right eye, so that the left image and the right image of the second liquid crystal screen are respectively projected to the left eye and the right eye of the viewer in an oriented mode.
2. The directional display device based on two liquid crystal panels according to claim 1, wherein: when the left and right images of the second liquid crystal screen are respectively projected to the left and right eyes of the viewer in an oriented manner, the viewer can view the 3D picture.
3. The directional display device based on two liquid crystal panels according to claim 1, wherein: the liquid crystal display panel further comprises a light guide layer, wherein the light guide layer is arranged between the first liquid crystal display panel and the optical film layer in a laminated mode.
4. The directional display device based on two liquid crystal panels according to claim 3, wherein: the light guide layer is air, and the optical film layer is a Fresnel lens or a three-dimensional grating.
5. The directional display device based on two liquid crystal panels according to claim 1, wherein: the first liquid crystal screen and the optical film layer form a visual area, and the processor is provided with a tracking module which is used for tracking the positions of the eyes of an observer.
6. The directional display device based on two liquid crystal panels according to claim 5, wherein: the processor is further used for screening out a visual area range according to the tracking module, when the situation that the eyes of a viewer are located outside the visual area range is detected, the first liquid crystal screen loads gray-scale images with the same gray-scale value of all sub-pixels, the second liquid crystal screen refreshes the display image, or the first liquid crystal screen and the second liquid crystal screen stop refreshing.
7. The directional display device based on two liquid crystal panels according to claim 6, wherein: the first liquid crystal screen independently adjusts the gray scale of each sub-pixel to perform brightness control on the backlight luminous element, and the backlight luminous element is in a vertical strip shape or an inclined strip shape.
8. The directional display device based on two liquid crystal panels according to claim 1, wherein: the refreshing frequency of the first liquid crystal screen and the refreshing frequency of the second liquid crystal screen are at least 120 Hz.
9. The directional display device based on two liquid crystal panels according to claim 1, wherein: the first liquid crystal screen takes pixels as a control unit.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101907774A (en) * | 2010-07-05 | 2010-12-08 | 深圳超多维光电子有限公司 | Stereoscopic display device |
| CN104601975A (en) * | 2014-12-31 | 2015-05-06 | 深圳超多维光电子有限公司 | Wide-view angle autosterescopic image display method and device |
| CN106019613A (en) * | 2016-07-27 | 2016-10-12 | 佛山市英视通电子科技有限公司 | Directive backlight stereo display device |
| CN108848370A (en) * | 2018-07-04 | 2018-11-20 | 深圳市华星光电半导体显示技术有限公司 | Full parallax changeable bore hole 3D display device and its display methods |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101593515B1 (en) * | 2009-04-21 | 2016-02-29 | 삼성디스플레이 주식회사 | Stereo-scopic image display device |
-
2019
- 2019-01-25 CN CN201910073845.6A patent/CN109613709B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101907774A (en) * | 2010-07-05 | 2010-12-08 | 深圳超多维光电子有限公司 | Stereoscopic display device |
| CN104601975A (en) * | 2014-12-31 | 2015-05-06 | 深圳超多维光电子有限公司 | Wide-view angle autosterescopic image display method and device |
| CN106019613A (en) * | 2016-07-27 | 2016-10-12 | 佛山市英视通电子科技有限公司 | Directive backlight stereo display device |
| CN108848370A (en) * | 2018-07-04 | 2018-11-20 | 深圳市华星光电半导体显示技术有限公司 | Full parallax changeable bore hole 3D display device and its display methods |
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