Color Filter Substrate with Integrated Sense Layer
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Solution Overview
Problem
Conventional on-cell capacitive display devices with touch function have low production yield and result in thicker products due to complex drive and sense line structures, requiring a turning process that complicates manufacturing and prevents substrate thinning.
Innovation Solution
A color filter substrate design where the sense layer and color filter layer are disposed on the same side of the base substrate, with drive and sense lines arranged side by side in the same layer, allowing for a single patterning process and eliminating the need for substrate turning, thereby increasing yield and enabling substrate thinning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If drive lines and sense lines are formed on the front surface of the base substrate, then the touch function can be implemented, but the base substrate cannot be thinned from its front surface resulting in a thicker product
Solution Approach 1:
The patent moves the touch function from the front surface to the back surface of the base substrate. The sense layer including drive lines and sense lines is formed on the back surface, allowing the front surface to be thinned without compromising the touch function. This dimensional relocation resolves the conflict between maintaining touch functionality and reducing substrate thickness.
2Ease of manufacture
If the base substrate is turned over after forming drive lines and sense lines, then subsequent manufacturing steps can be performed, but the turning over process and subsequent manufacturing process greatly reduce the yield of production
Solution Approach 1:
Instead of forming drive lines and sense lines on the front surface and then turning the substrate over, the patent inverts the conventional approach by forming the sense layer on the back surface first. This eliminates the need for substrate turning and subsequent complex manufacturing steps, thereby significantly improving production yield while maintaining manufacturing feasibility.
3Ease of operation
If drive lines and sense lines are formed on the front surface of the base substrate, then the touch function is achieved, but the structure becomes complicated
Solution Approach 1:
The patent extracts the sense layer (including drive lines and sense lines) from the front surface structure and places it on the back surface of the base substrate. This separation simplifies the front surface structure, eliminating the complexity of having intersecting drive and sense lines on the display surface, while preserving the capacitive touch function on the back surface.
Data Source
AI summary
Embodiments of the invention disclose a color filter substrate and a manufacturing method thereof, a display device with touch function and a driving method thereof. The color filter substrate comprises: a base substrate, a sense layer and a color filter layer disposed on the base substrate. The color filter layer includes a black matrix and a plurality of color filter patterns separated from each other by the black matrix. The sense layer and the color filter layer are disposed on a same side of the base substrate. The sense layer includes a plurality of sense regions, and a drive line and a sense line are provided side by side in a same layer in each of the sense regions.