Display Light-Shielding Separation for Black-State Pixel Brightening
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Solution Overview
Problem
Liquid crystal display devices face issues with external light reflection and charging, leading to bright pixels during black display states due to low-resistant light-shielding layers connecting with each other, which affects image quality.
Innovation Solution
Separating light-shielding layers from each other at specific locations in the display device and stacking color filters of different colors at these separation points to prevent charging and reduce light reflection, thereby enhancing image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If light-shielding layers are connected to each other to cover frame portion and wiring portion, then external light reflection is prevented, but charges enter pixels and pixels become bright during black display state
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 at the outermost peripheral portion to prevent charge conduction while maintaining light-shielding functionality in both areas.
Solution Approach 2:
Different regions of the display device are treated with different light-shielding configurations. The frame portion has one light-shielding arrangement while the effective pixel portion has another, with the separation occurring at the boundary region to locally address the charging issue without compromising overall light-shielding performance.
2Object-generated harmful factors
If light-shielding layers are separated from each other to prevent charging, then pixel brightening is suppressed, but external light reflection increases
Solution Approach 1:
The light-shielding function is segmented into multiple separate layers rather than one continuous layer. This segmentation prevents charge conduction paths while distributing the light-shielding function across multiple zones, allowing each segment to independently perform its light-shielding role without enabling charge flow to pixels.
Solution Approach 2:
The separated light-shielding layers collectively perform multiple functions: the first layer shields the frame portion, the second layer shields the wiring portion, and together they maintain overall light-shielding effectiveness while preventing charge conduction through their separation at the boundary region.
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.