Display Substrate Data Line Light-Shading Layer Integration
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Solution Overview
Problem
In liquid crystal display (LCD) devices, the increasing resolution requires more transistors in the display region, which affects the pixel opening rate due to the need for a light-shading layer to block backlight, leading to a decrease in pixel opening rate.
Innovation Solution
The display substrate design includes a data line that functions as a light-shading layer by being positioned between the active layer and the base substrate, with a widening part at the position corresponding to the first via hole to effectively block backlight without the need for a separate light-shading layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a separate light-shading layer is added to block backlight, then backlight blocking is improved, but device complexity and manufacturing complexity increase
Solution Approach 1:
The data line is merged with the light-shading layer function by positioning it between the active layer and base substrate. The data line structure itself serves dual purposes: electrical connection and backlight blocking, eliminating the need for a separate light-shading layer.
Solution Approach 2:
The data line is designed to perform multiple functions simultaneously: it provides electrical connection to the active layer and also acts as a light-shading layer to block backlight. This multi-functionality reduces the overall number of components needed in the display substrate.
2Measurement precision
If more transistors are added to increase resolution, then measurement precision is improved, but pixel opening rate decreases due to light-shading layer requirements
Solution Approach 1:
By merging the data line with the light-shading function, the patent eliminates the need for additional light-shading layers that would occupy pixel area. This allows more transistors to be accommodated in the display region without further reducing the pixel opening rate beyond what is already required for transistor placement.
3Area of stationary object
If data line is positioned between active layer and base substrate, then pixel opening rate is improved by eliminating separate light-shading layer, but manufacturing precision requirements increase
Solution Approach 1:
The data line is positioned in advance between the active layer and base substrate during the manufacturing process, before subsequent layers are deposited. This preliminary positioning ensures that the data line serves as the light-shading layer without requiring additional alignment steps for a separate light-shading layer.
4Object-affected harmful factors
If data line is widened at first via hole position, then backlight blocking is improved, but area of data line increases
Solution Approach 1:
The data line is widened only at the specific location corresponding to the first via hole where backlight blocking is most critical, while maintaining its original width in other regions. This localized widening provides enhanced backlight blocking exactly where needed without significantly increasing the overall data line area.
Data Source
AI summary
The present disclosure provides a display substrate, a display panel and a display apparatus. The display substrate includes a base substrate; a transistor, located on the base substrate, and including an active layer; and a data line, located between the active layer and the base substrate; the data line is connected with the active layer, and an orthographic projection of the active layer on the base substrate is located in an orthographic projection of the data line on the base substrate.