LCD Light-Shielding Layout to Cut Reflection and Pixel Charging
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Solution Overview
Problem
Existing liquid crystal display devices suffer from external light reflection and pixel charging issues due to interconnected light-shielding layers, leading to reduced image quality.
Innovation Solution
The light-shielding layers in the frame and wiring portions of the display device are separated and stacked with color filters of different colors at the separation locations to prevent charging and reduce light reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If light-shielding layers are connected to each other to cover frame and wiring portions, then light reflection is prevented, but charges enter pixels causing undesired brightening
Solution Approach 1:
The light-shielding layer is divided into multiple separate regions: a first light-shielding layer covering the frame portion and a second light-shielding layer covering the wiring portion within the effective pixel portion. These layers are separated by a non-light-shielding region, preventing electrical connection while maintaining light shielding functionality in both areas.
2Object-generated harmful factors
If light-shielding layers are separated to prevent charging, then pixel brightening is suppressed, but light reflection from wiring portions increases
Solution Approach 1:
Different regions of the display device are treated with different light shielding properties. The frame portion has a first light-shielding layer, the wiring portion has a second light-shielding layer, and the separation region has no light-shielding layer. This localized differentiation allows each region to have optimal light shielding while preventing unwanted charging effects.
3Object-generated harmful factors
If crossed Nicols of polarizers are used to suppress charging, then some charging effect is reduced, but external light reflection is not sufficiently prevented
Solution Approach 1:
Instead of relying solely on optical filters like crossed Nicols, the solution segments the light-shielding function into separate physical layers that can be independently controlled. This structural segmentation provides more effective suppression of both charging and light reflection compared to uniform optical filtering approaches.
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
This configuration suppresses brightening of light-shielding portions and external light reflection, resulting in a higher quality image display.
Implementation Method 1
the frame portion and the top part of a wiring portion within an effective pixel portion are covered with light-shielding layers
Implementation Method 2
color filters that are arranged so as to correspond to color displays of the pixels
Data Source
AI summary
A display device includes a display section in which a plurality of pixels are arrayed in a matrix, a plurality of scan lines which select pixels, a plurality of signal lines which supply image signals to the selected pixels, and color filters that are arranged so as to correspond to color displays of the pixels. In the device, the display section includes an effective pixel portion and a frame portion that surrounds the effective pixel portion, and the frame portion and a wiring circuit of the effective pixel portion are covered with light-shielding layers, the light-shielding layers being separated from each other at a certain separation location in the display section, and a plurality of color filters having different colors are arranged by being stacked at the separation location.