Display Device Blurring Regions for Edge Light Leakage Control
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Solution Overview
Problem
Existing display devices face issues with unintended light leakage and reduced image contrast at the edges due to the dimming panel transmitting light unconditionally wider than the pixel region, leading to double images and chipped edges when viewed obliquely.
Innovation Solution
A display device with a dimming panel that applies a blurring process to control dimming pixels to transmit light over a wider region than the pixel region, forming a blurring region only when a predetermined condition is satisfied, particularly at the edges, to prevent light leakage and maintain image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the dimming panel transmits light over a wider region than the pixel region, then image contrast is improved and viewing angle is enhanced, but unintended light leakage occurs at the outer edge of the display panel
Solution Approach 1:
The patent applies different light transmission control strategies to different regions of the dimming panel. Specifically, the dimming panel has a first region corresponding to the pixel region and a second region extending beyond it. The control unit selectively controls light transmission in these regions based on whether the displayed image contains high-luminance components, thereby achieving both improved contrast and reduced light leakage through localized quality differentiation.
2Adaptability or versatility
If the dimming panel transmits light unconditionally wider than the pixel region, then oblique viewing quality is improved, but double images and chipped edges appear at the outer edge
Solution Approach 1:
The patent implements dynamic control of the dimming panel's light transmission characteristics based on the content of the displayed image. The control unit detects whether the image contains high-luminance components and adjusts the dimming panel's transmission region accordingly - expanding it beyond the pixel region when high luminance is present to improve viewing angle, and retracting it to match the pixel region when high luminance is absent to prevent double images and chipped edges.
3Area of stationary object
If the dimming panel region is made wider than the pixel region, then light transmission for oblique viewing is improved, but light leakage and image degradation occur at the outer edge
Solution Approach 1:
The patent employs a feedback mechanism where the control unit continuously monitors the luminance characteristics of the displayed image and adjusts the dimming panel's light transmission region in response. When the image contains high-luminance components, the system expands the transmission region to improve viewing angle; when high luminance is absent, it contracts the region to prevent light leakage and image degradation, thereby maintaining optimal performance across different viewing conditions.
Data Source
AI summary
A display device includes: a display panel with pixels; a dimming panel with dimming pixels; and a light source. When a pixel is controlled to be lit in white and a predetermined condition is satisfied, a blurring region is formed, and light from the light source is transmitted through the blurring region and the pixel. When a pixel is controlled to be lit up in white and the predetermined condition is not satisfied, the blurring region is not formed, the dimming pixel overlapping the pixel on a straight line along a direction in which the display panel faces the dimming panel is controlled to transmit light, and light from the light source is transmitted through the dimming pixel and the pixel. The predetermined condition is satisfied when the pixel controlled to be lit in white is at a predetermined distance or farther from an outer edge of a display area.