Method for improving backlight illumination uniformity based on backlight three-dimensional display device

A stereoscopic display device and backlighting technology, applied in optics, optical components, instruments, etc., can solve the problems of bright and dark areas, poor uniformity, etc., to eliminate bright and dark stripes, improve display effects, and have good backlighting uniformity. Effect

Inactive Publication Date: 2020-09-04
绍兴图聚光电科技有限公司
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Problems solved by technology

[0008] In order to overcome the shortcomings of bright and dark areas and poor uniformity in the backlight of the existing directional backlight stereoscopic display device, the present invention proposes a method for improving the uniformity of backlight illumination based on the backlight stereoscopic display device. Unevenness leads to improvement When the backlight illumination is uneven, the illumination distribution of the backlight illumination area after the beam is diffused reaches a state of good uniformity

Method used

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  • Method for improving backlight illumination uniformity based on backlight three-dimensional display device
  • Method for improving backlight illumination uniformity based on backlight three-dimensional display device
  • Method for improving backlight illumination uniformity based on backlight three-dimensional display device

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Embodiment 1

[0044] Such as image 3 , which is a method for improving the uniformity of backlight illumination of a backlight stereoscopic display device by adjusting the distance between light sources in the same line and the distance between lines of light sources. A camera fixed at the center of the system viewing area 150 is used to photograph the image display unit of the existing backlight stereoscopic display device when displaying a full-white image, and extract the grayscale of the obtained image. The set gray value range is [0, 255], then the gray value corresponding to the maximum light intensity corresponding to the original system light source unit is G Max =255.

[0045] Assuming that the light intensity distribution of the light emitted by each light source unit in any plane passing through its main optical axis is similar to a Gaussian curve, then the light intensity of each actual light source unit after entering the lens, spatial light modulator and diffusion film The ...

Embodiment 2

[0058] see Figure 4 , Figure 4 It is a schematic diagram of a backlight stereoscopic display device after adding a spatial light modulator array with a specific gray scale distribution pattern, wherein the spatial light modulator window unit 221 and the light source unit 221 are in a corresponding relationship, the linear diffusion film has a certain diffusion direction and the lens array A two-dimensional lens is used in . After adjusting the light source spacing and the light source line spacing, the minimum brightness of the dark area has increased significantly, but G′ A with G' Max There are still some gaps, and there is still a certain transition area between the two, which will also lead to uneven lighting, and the light intensity distribution of the backlight needs to be further modulated by the spatial light modulator.

[0059] A spatial light modulator window with a specific grayscale distribution pattern is added to modulate the known grayscale distribution to ...

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Abstract

The invention discloses a method for improving backlight illumination uniformity based on a backlight three-dimensional display device. Aiming at the problem that uneven backlight illumination can becaused by uneven backlight illumination intensity distribution, the light source interval of a backlight system is optimized and adjusted, and a certain gray level distribution pattern is applied to awindow of a spatial light modulator, so that illumination distribution of a backlight illumination area after light beam diffusion reaches a state of good uniformity. By optimizing and adjusting thelight source distance of the backlight system, dark areas generated on a back lighting surface due to uneven distribution of unit illumination intensity of the light source can be effectively eliminated; a pattern with a certain gray level distribution is applied to a window of the spatial light modulator, and the light beams passing through the linear lens are modulated, so that the light intensity of the diffused light beams reaches expected uniform distribution, good backlight illumination uniformity of the backlight three-dimensional display device is ensured, and the display effect of thebacklight three-dimensional display device is improved.

Description

technical field [0001] The invention belongs to the field of image display, in particular to a method for improving the backlight uniformity of a backlight stereoscopic display device. Background technique [0002] Stereoscopic display technology is the mainstream development direction of display technology in the future, and its most extensive and basic application is the stereoscopic display method based on parallax images. Since the left eye and the right eye of a person are in different positions in the world coordinate system, through a certain method, the left and right eyes can obtain parallax images with different position information so that the brain can obtain the spatial position information, and we have achieved the purpose of stereoscopic display. [0003] The currently widely used stereoscopic display technology requires the audience to wear 3D glasses. However, with theoretical exploration and technological progress, naked-eye 3D display technology has gradua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B30/33G02B27/09
CPCG02B27/0927G02B27/095G02B27/0955
Inventor 何赛灵李明锦余文涛
Owner 绍兴图聚光电科技有限公司
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