Integrated Touch Display Panel Black Matrix Design
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Solution Overview
Problem
OLED display devices with touch functionality are thick due to the inclusion of a separate touch panel, which increases the overall thickness of the device.
Innovation Solution
Incorporating a black matrix (BM) with light-shielding conductive patterns that are insulated from each other and connected to a touch integrated circuit (IC), eliminating the need for a separate touch panel by directly integrating the touch function into the display panel, and using anti-reflection layers to improve display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a separate touch panel is included in the OLED display device, then touch functionality is achieved, but the overall thickness of the device increases
Solution Approach 1:
The patent merges the touch panel and display panel into a single integrated structure. The black matrix substrate serves as both the display panel substrate and the touch panel substrate, eliminating the need for a separate touch panel layer. This integration maintains full touch functionality while significantly reducing the overall device thickness.
Solution Approach 2:
The black matrix substrate is designed to perform multiple functions simultaneously: it acts as the substrate for the display panel, provides light shielding, and serves as the base for the touch electrode layer. This multi-functionality allows the device to achieve touch capability without adding extra thickness from a separate touch panel.
2Adaptability or versatility
If the black matrix is made conductive and connected to touch IC, then touch function is integrated, but manufacturing complexity increases
Solution Approach 1:
The patent combines the black matrix layer with the touch electrode layer into a single conductive structure. By making the black matrix conductive and connecting it to the touch IC, the design integrates touch functionality into the existing display structure without requiring separate touch electrode layers or additional manufacturing steps for touch components.
3Object-generated harmful factors
If light-shielding conductive patterns are used in the black matrix, then light leakage is prevented, but electrical insulation between patterns becomes challenging
Solution Approach 1:
The black matrix is divided into multiple light-shielding conductive patterns that are electrically insulated from each other. Each pattern corresponds to a specific pixel or pixel group and is electrically isolated through insulation layers. This segmentation allows each pattern to function as an independent touch electrode while maintaining light-shielding properties, solving both the light leakage and electrical insulation challenges.
Solution Approach 2:
Insulation layers are introduced as intermediary elements between the light-shielding conductive patterns. These insulation layers prevent electrical conduction between adjacent conductive patterns while allowing each pattern to maintain its light-shielding function. The intermediary insulation layers resolve the conflict between electrical conductivity needs and electrical isolation requirements.
Data Source
AI summary
A touch display panel, a manufacturing method thereof and a touch display device are provided. The touch display panel includes: a black matrix; and a plurality of pixel units arranged in an array; the black matrix is a conductor, and includes a plurality of light-shielding conductive patterns which are insulated from each other.