CN102486575B - Grating-type free stereo display device - Google Patents
Grating-type free stereo display device Download PDFInfo
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- 238000002955 isolation Methods 0.000 claims abstract description 6
- 238000012935 Averaging Methods 0.000 claims 1
- 208000003164 Diplopia Diseases 0.000 abstract 1
- 208000002173 dizziness Diseases 0.000 abstract 1
- 208000029444 double vision Diseases 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 11
- 230000002159 abnormal effect Effects 0.000 description 6
- 230000004438 eyesight Effects 0.000 description 6
- 239000011521 glass Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 4
- 125000001475 halogen functional group Chemical group 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 210000001747 pupil Anatomy 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000001179 pupillary effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
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Abstract
The invention discloses a kind of grating-type free stereo display device, including image display panel and the grating module being arranged on image display panel front, wherein: image display is pressed the arrangement of right left view dot sequency cycle staggering by described image display panel, and inserts a vacant isolation pixel between each group of viewpoint pixel arrangement cycle.The present invention is possible not only to be inherently eliminated phenomenon of feeling dizzy, and can compatible existing spectacle double vision point 3d program source.
Description
Technical Field
The present invention relates to a technology for displaying an autostereoscopic image on a display screen, and more particularly, to a grating autostereoscopic display apparatus.
Background
For the 3d display technology, the naked eye stereoscopic display technology without wearing special glasses is the ultimate development direction, the grating type free stereoscopic display technology is a relatively mature and feasible technical means for realizing naked eye stereoscopic display, the simplest grating type free stereoscopic display belongs to the double-viewpoint free stereoscopic display technology, the double-viewpoint free stereoscopic display technology can directly use a great amount of existing double-viewpoint 3d program sources based on the glasses type stereoscopic display mode, and the compatibility is strong.
However, the dual-viewpoint autostereoscopic display technology has abnormal viewing regions with a probability of 50%, and these abnormal viewing regions are distributed in a staggered manner with the normal viewing regions, so that when the eyes of a viewer are in the abnormal viewing regions, normal stereoscopic vision cannot be generated, and the viewer is prone to generating an eye halo phenomenon due to the spatial parallax inversion of left and right viewpoint images, and therefore, the degree of practical naked eye stereoscopic display cannot be achieved by adopting the conventional dual-viewpoint autostereoscopic display technology.
Referring to fig. 1a and 1b, wherein fig. 1a is a schematic diagram of a conventional dual-view autostereoscopic display apparatus using slit gratings, the apparatus mainly comprises an image display screen and a slit grating disposed in front of the image display screen, the pixels L and R of the sub-images corresponding to the left eye viewpoint and the right eye viewpoint are staggered in columns on the image display screen, when the human eyes watch the image displayed on the image display screen through each slit of the slit grating at the position shown in the figure, the left eye sight line can only fall on the pixel L of the left eye viewpoint sub-image, the right eye sight line can only fall on the pixel R of the right eye viewpoint sub-image, namely, the left eye can only see the left eye viewpoint sub-image, the right eye can only see the right eye viewpoint sub-image, and normal 3d parallax exists between the two sub-images, so that the viewer can generate normal 3d vision.
With continued reference to fig. 1b, as a result of the human eye viewing the image displayed on the image display screen through each slit of the slit grating after translating a interpupillary distance laterally from the position shown in fig. 1a, the left and right eye sight lines of the human eye are opposite to the case of fig. 1a, and both the left and right eye sight lines fall on the pixels to which the wrong viewpoint sub-images belong, that is, the left eye sees the right eye viewpoint sub-image, and the right eye sees the left eye viewpoint sub-image, that is, parallax inversion is generated, which not only does not produce a normal 3d visual effect, but also easily causes discomfort caused by vignetting to the viewer.
In order to improve the above-mentioned defects of the dual view point grating type autostereoscopic display, a multi view point grating type autostereoscopic display technology has been developed. The multi-view grating type free stereo display technology adopts more than two view sub-image combinations with continuous parallax sequences as a 3d display image source, and can greatly improve the defects existing in the double-view grating type free stereo display technology along with the increase of the number of views, thereby greatly reducing the occurrence of halation phenomenon of a viewer.
Although the adoption of the multi-view auto-stereoscopic display technology can improve the defect of the halation of the viewer caused by the parallax inversion phenomenon (or improve the viewing comfort), the improvement is realized at the expense of the resolution and brightness of the acquired 3d image, the improvement only can reduce the halation phenomenon of the viewer caused by the parallax inversion and cannot be eradicated, the complexity of the whole process of acquiring the terminal display from the system including the image is greatly increased, and the compatibility with the system which realizes the glasses type double-view 3d display and even the traditional 2d display is almost impossible.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide a grating type autostereoscopic display apparatus, which is compatible with a large number of existing glasses type dual-view 3d program sources, and can eliminate an eye halo fatigue phenomenon caused by a parallax inversion phenomenon when a viewer watches a multi-view autostereoscopic display image with naked eyes.
In order to achieve the above object, the present invention provides a grating type autostereoscopic display apparatus, including an image display screen and a grating module disposed in front of the image display screen, characterized in that: the image display screen periodically and alternately arranges image display pixels according to the sequence of right and left viewpoints, and inserts a vacant isolation pixel between each group of viewpoint pixel arrangement periods.
The invention has the beneficial effects that: the invention can fundamentally eliminate the phenomenon that a viewer generates halation due to parallax inversion in the existing free stereo display technology, and can be compatible with the existing large quantity of glasses type double-viewpoint 3d program sources.
Furthermore, the invention can reduce the number of viewpoints of a 3d image source for forming the auto-stereoscopic display device, thereby simplifying the complexity of the whole process of acquiring the image to be displayed by the terminal for realizing the auto-stereoscopic display, improving the compatibility of the system with the existing glasses type 3d display system and the traditional 2d display system, and improving the display resolution and the brightness performance of the auto-stereoscopic display device.
Drawings
FIGS. 1a and 1b are schematic diagrams of a conventional dual view autostereoscopic display apparatus of a slit grating according to the prior art;
FIG. 2a is a schematic diagram of an autostereoscopic display apparatus according to a first embodiment of the present invention;
FIG. 2b is a schematic diagram of a human eye viewing an image displayed on the image display screen through each slit of the slit grating after translating a pupil distance laterally to the left from the viewing position shown in FIG. 2 a;
FIG. 2c is a schematic view of a human eye viewing an image displayed on the image display screen through each slit of the slit grating after being laterally shifted to the right by one pupillary distance from the viewing position shown in FIG. 2 a;
FIG. 3 is a schematic diagram of an autostereoscopic display apparatus according to a second embodiment of the present invention;
FIG. 4 is a schematic diagram of an autostereoscopic display apparatus according to a third embodiment of the present invention;
FIG. 5 is a schematic diagram of an autostereoscopic display apparatus according to a fourth embodiment of the present invention;
fig. 6 is a schematic diagram of an autostereoscopic display apparatus according to a fifth embodiment of the present invention.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments.
Fig. 2a is a schematic diagram of a general dual-view autostereoscopic display apparatus using a slit grating according to a first embodiment of the present invention. Different from the traditional design, a vacant isolation pixel is inserted between each group of adjacent left and right eye viewpoint sub-image pixels which are arranged in a staggered mode, the pixel arrangement is changed from the' RLRLRL.
Fig. 2b shows the result of human eyes viewing the image displayed on the image display screen through each slit of the slit grating after translating a pupil distance from the viewing position shown in fig. 2a to the left, wherein the right eye view all falls on the L pixels and the left eye view all falls on the empty isolated pixels, and the human eyes visually observe only a 2d left viewpoint image without observing the abnormal image with left-right parallax inversion which is easy to cause eye halo of the viewer.
Fig. 2c shows the result of human eyes viewing the image displayed on the image display screen through each slit of the slit grating after laterally shifting a pupil distance to the right from the viewing position shown in fig. 2a, wherein the left eye lines all fall on the R pixels and the right eye lines all fall on the empty isolated pixels, and the human eyes visually observe a 2d right viewpoint image without observing an abnormal image with left-right parallax inversion which is easy to cause eye halo of the viewer.
Therefore, as described above, according to the present invention, when the human eye is at a specific viewing position, normal 3d image display can be viewed, and when the human eye is at any position, an abnormal image with left-right parallax inversion, which is likely to cause halation of the viewer, is not viewed, so that discomfort is not caused to the viewer.
Fig. 3 shows a second embodiment of the present invention, in order to avoid moire interference caused by interference between the slit gratings and the equally spaced black stripes formed by the empty pixels not emitting light in the first embodiment, the isolated pixels are set to 0 pixels, and V0 represents the value of 0 pixels, VR and VL represent the values of R pixels and L pixels, respectively, and V0 is (VR + VL)/2, so that the isolated pixels also emit light according to the displayed image content, and the average values of the R pixels and L pixels are displayed.
Fig. 4 shows a third embodiment of the present invention, where the value of an image pixel is V ═ Y + C, where Y is a luminance component and C is a chrominance component, in this embodiment, V0 is used to represent a value of 0 pixel, and YR and YL are used to represent luminance components in R and L pixel values, respectively, then V0 is (YR + YL)/2, that is, the isolated pixel is made to only display the average value of the luminance components of the R pixel and the L pixel.
Fig. 5 shows a fourth embodiment of the present invention, if the luminance component of the image signal is divided into a low frequency component and a high frequency component, which are respectively denoted by Y1 and Yh, then Y is 1+ Yh, where Y1 reflects the background luminance of the image and Yh reflects the luminance detail of the image, in this embodiment, the value of the isolated pixel is set as V0 ═ YR1+ YL1)/2 or V0 ═ YR + YL)1/2, where (YR1+ YL1)/2 denotes that the luminance components of the R pixel and the L pixel are respectively averaged and then averaged, and (YR + YL)1/2 denotes that the luminance components of the R pixel and the L pixel are averaged and then averaged, and the moire effect of the two is equivalent, which can further reduce and eliminate the visual interference and the inversion phenomenon of the isolated pixel to the R pixel and the L pixel, and can avoid the moire interference generated thereby, as for extracting low-frequency components from the luminance signals of the image, the low-frequency components can be implemented in a low-pass filtering manner in a one-dimensional, two-dimensional or three-dimensional space, which is also a mature prior art and is not described herein again.
Fig. 6 is a diagram of a fifth embodiment of the present invention, which is a schematic diagram of a 4-view autostereoscopic display apparatus according to the present invention, wherein an isolated pixel 0 is inserted between a 4 th view pixel and a 1 st view pixel, and according to the different designs of the above embodiments, a value V0 of the isolated pixel 0 may be 0, or may be an average value of the 1 st to 4 th view pixels, or may be an average value of luminance components of the 1 st to 4 th view pixels, or may be a low-frequency component of the average value of the luminance components of the 1 st to 4 th view pixels.
According to the method disclosed by the invention, the autostereoscopic display device with any view point can be designed without being limited by the design examples provided by the above embodiments.
The method according to the present invention is not limited to the use of slit grating autostereoscopic display devices, but is also applicable to other types of grating autostereoscopic display devices for viewpoint segmentation, such as lenticular lenses.
The method according to the present invention is also applicable to an autostereoscopic display device of a so-called "rear barrier" type in which a barrier for viewpoint division is interposed between a liquid crystal light modulation layer of an image display panel and a backlight for illumination (in the case where the image display panel is a liquid crystal display panel), without being restricted to an autostereoscopic display device of a so-called "front barrier" type in which a barrier for viewpoint division is interposed on the viewing side of the image display panel.
Although the present disclosure has been described in detail with reference to the specific embodiments, it should be understood that various changes or modifications can be made by those skilled in the art without departing from the principle and spirit of the present disclosure, and these changes and modifications should fall within the scope of the present disclosure.
Claims (7)
1. The utility model provides a grating formula autostereoscopic display device, includes image display screen and sets up the grating module in image display screen the place ahead which characterized in that: the image display screen periodically arranges image display pixels in a staggered way according to the sequence of right and left viewpoints, and inserts an isolation pixel between each group of viewpoint pixel arrangement periods to form the arrangement of 'right and left viewpoints, isolation pixels, right and left viewpoints, and isolation pixels …', wherein the pixel value is defined as V = Y + C, wherein Y is a luminance component, and C is a chrominance component;
the pixel value of the isolated pixel is set to the average value of the right pixel value and the left pixel value in the above-mentioned one set of viewpoint pixels,
V0=（VR+VL）/2；
or,
the pixel value of the isolated pixel is set to the average value of the luminance component in the right pixel value and the luminance component in the left pixel value, V0= (YR + YL)/2;
or,
the pixel value of the isolated pixel is set to be that the luminance components of the right pixel and the left pixel take their low frequency components and then their average values, respectively (V0 = (YRl + YLl)/2); or averaging the luminance components of the right pixel and the left pixel and then taking the low-frequency components thereof (V0 = (YR + YL) l/2).
2. The display device according to claim 1, wherein: the isolated pixel is inserted between the 4 th viewpoint pixel and the 1 st viewpoint pixel of the next group of viewpoint pixels, forming an arrangement of "viewpoint 1, viewpoint 2, viewpoint 3, viewpoint 4, isolated pixel, viewpoint 1, viewpoint 2, viewpoint 3, viewpoint 4, isolated pixel …".
3. The display device according to claim 2, wherein: the pixel value of the isolated pixel is an average value of the 1 st to 4 th viewpoint pixel values.
4. The display device according to claim 2, wherein: the luminance component of the isolated pixel is an average value of the 1 st to 4 th viewpoint pixel luminance components.
5. The display device according to claim 2, wherein: the luminance component of the isolated pixel is a low frequency component of an average value of the 1 st to 4 th viewpoint pixel luminance components.
6. The display device according to claim 1, wherein: the grating module is a front grating module or a rear grating module.
7. The display device according to claim 1, wherein: the grating module is a slit grating module or a cylindrical mirror grating module.
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| CN201010573306.8A CN102486575B (en) | 2010-12-03 | 2010-12-03 | Grating-type free stereo display device |
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| CN201010573306.8A CN102486575B (en) | 2010-12-03 | 2010-12-03 | Grating-type free stereo display device |
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| CN102486575B true CN102486575B (en) | 2016-08-31 |
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| CN102707446B (en) * | 2012-06-14 | 2014-04-30 | 天马微电子股份有限公司 | Double-vision display device |
| CN112485917B (en) * | 2021-01-11 | 2022-05-17 | 成都工业学院 | Double-vision 3D display device based on rectangular pinhole array |
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| KR101301770B1 (en) * | 2008-01-23 | 2013-09-02 | 엘지디스플레이 주식회사 | Liquid Crystal Display and Dimming Controlling Method thereof |
| KR101362771B1 (en) * | 2008-09-17 | 2014-02-14 | 삼성전자주식회사 | Apparatus and method for displaying stereoscopic image |
| CN101655608B (en) * | 2009-07-22 | 2012-07-11 | 深圳超多维光电子有限公司 | Full resolution stereoscopic display device |
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