Touch Display Device Thickness Reduction via Substrate Integration
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Solution Overview
Problem
Existing reflective liquid crystal display (RLCD) devices with touch functionality are thick due to the use of a separate substrate for the touch wiring layer, which hinders the development of ultra-thin products and exposes users to harmful blue light.
Innovation Solution
The integration of a touch wiring layer on the color filter or array substrate within the liquid crystal display panel, eliminating the need for a separate substrate and incorporating a front light source structure to reduce thickness and eye damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a separate substrate is used for the touch wiring layer in plug-in touch solutions, then the touch control function is achieved, but the overall thickness of the display device increases
Solution Approach 1:
The patent merges the touch wiring layer with the color filter substrate by directly forming the touch wiring layer on the color filter substrate surface. This integration eliminates the separate substrate required in traditional plug-in touch solutions, thereby reducing the overall display device thickness while maintaining the touch control function.
Solution Approach 2:
The color filter substrate serves dual functions: it acts as both the color filter component and the substrate for the touch wiring layer. This multi-functionality approach eliminates the need for a dedicated separate substrate, contributing to thickness reduction while preserving touch control capabilities.
2Ease of manufacture
If a separate substrate is used for the touch wiring layer, then the touch component can be independently fabricated, but the product thickness increases and ultra-thin design is hindered
Solution Approach 1:
The touch wiring layer is combined with the color filter substrate fabrication process. The touch wiring layer is directly formed on the color filter substrate surface, integrating what were previously separate manufacturing steps into a unified process, thereby enabling ultra-thin design without compromising manufacturing ease.
3Illumination intensity
If traditional liquid crystal displays with backlight are used, then the display function is achieved, but harmful blue light damages eyes
Solution Approach 1:
The patent converts the traditional backlight-based illumination system into a reflective display system that utilizes ambient light. By replacing the active backlight with a reflective mechanism, the harmful blue light emission is eliminated while the display function is maintained through reflection of environmental light.
Data Source
AI summary
The application discloses a touch display device including a touch display panel and a light source structure. The touch display panel has a first side used to display and a second d side opposite to the first side. The touch display panel includes a color filter substrate and an array substrate. The color filter substrate includes a color filter base having a first surface. The array substrate includes an array base having a second surface. At least one touch wiring layer is arranged on one of the first surface and the second surface. A light source structure arranged on a display side of the touch display panel is used to emit light to the touch display panel.