Dimming Panel Light Transmission for Display Viewing Angle
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Solution Overview
Problem
Conventional display devices fail to maintain optimal display quality due to mismatch between dimming panel control and the anisotropy of liquid crystal display panels, leading to reduced contrast and viewing angle issues.
Innovation Solution
A display device with a dimming panel disposed between the liquid crystal display panel and the light source, featuring dimming pixels that adjust light transmission based on the viewing angle characteristics, ensuring appropriate light distribution and minimizing parallax and halo effects by varying the degree of transmission across different directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a dimming panel is provided between the liquid crystal display panel and the light source to increase contrast, then the contrast of the image is improved, but the display quality deteriorates due to mismatch between dimming control and viewing angle characteristics
Solution Approach 1:
The patent applies local quality by controlling different regions of the dimming panel with different transmission characteristics. Specifically, the dimming panel has a first region with first transmission characteristics and a second region with second transmission characteristics, allowing each region to be optimized for its specific function while maintaining overall display quality across different viewing angles
Solution Approach 2:
The patent implements dynamics by making the transmission characteristics of the dimming panel adjustable and view-angle-dependent. The control unit dynamically adjusts the dimming panel's transmission characteristics based on the detected viewing angle, allowing the system to adapt to different viewing conditions and maintain optimal display quality
2Device complexity
If conventional dimming control is used without considering anisotropy, then the device complexity is reduced, but the display quality deteriorates due to parallax and halo effects
Solution Approach 1:
The patent implements feedback by using a sensor to detect the actual viewing angle and using this information to adjust the dimming panel's transmission characteristics. This closed-loop control system automatically compensates for viewing angle changes, reducing parallax and halo effects while maintaining display quality without requiring complex manual calibration
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively maintains display quality across various viewing angles by optimizing light transmission through the dimming panel, reducing parallax and halo occurrences, and enhancing overall image clarity.
Implementation Method 1
the light is transmitted through a predetermined one of the dimming pixels located on an optical axis of the light that is emitted to the one of the pixels and through the other dimming pixels arranged around the predetermined dimming pixel
Data Source
AI summary
A display device incudes: a display panel including a plurality of pixels; and a dimming panel that is disposed between the display panel and a light source of light to be emitted to the display panel and includes a plurality of dimming pixels. When one of the pixels produces an output at highest luminance and the other pixels produce an output at lowest luminance to the display panel, the light is transmitted through a predetermined one of the dimming pixels located on an optical axis of the light that is emitted to the one of the pixels and through the other dimming pixels arranged around the predetermined dimming pixel. A degree of transmission of the light through the other dimming pixels decreases as the light is away along one direction from the predetermined dimming pixel, and there are a plurality of directions having different degrees of the decrease.