Touch Display Panel Brightness Uniformity via Edge Electrode Arrangement
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Solution Overview
Problem
Non-squared touch display devices, such as circular or chamfered panels, experience poor brightness due to non-uniform arrangements of touch lines and contact holes, leading to brightness deviations in adjacent areas.
Innovation Solution
The solution involves arranging touch lines and contact holes in a uniform or symmetrical pattern in the outer edge of the display panel, including the use of dummy touch lines and integrating touch electrodes in non-squared areas to ensure consistent touch sensing and display functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If touch lines and contact holes are arranged in conventional patterns in non-squared display panels, then manufacturing is simplified, but brightness uniformity deteriorates in outer edge areas
Solution Approach 1:
The patent applies different touch line arrangement patterns to different regions of the display panel. Specifically, the outer edge area uses a first arrangement pattern while the inner area uses a second arrangement pattern, allowing each region to be optimized for its specific characteristics rather than applying a uniform pattern throughout.
Solution Approach 2:
The display panel is divided into two distinct regions: an outer edge area and an inner area. This segmentation allows independent optimization of touch line arrangements in each region, addressing the brightness uniformity issue in the outer edge without compromising the overall manufacturing simplicity.
2Area of stationary object
If touch electrodes are integrated in non-squared areas, then display area is increased, but touch sensing precision may deteriorate
Solution Approach 1:
Different touch electrode configurations are applied to different regions. The outer edge area uses integrated touch electrodes that merge with adjacent electrodes to maximize display area, while the inner area maintains conventional separate electrode arrangements that prioritize touch sensing precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This arrangement mitigates brightness deviations by ensuring uniform voltage distribution and touch sensitivity across non-squared display panels, enhancing the overall display quality and user experience.
Implementation Method 1
a liquid crystal layer with dielectric anisotropy between the two substrates. A voltage applied to the electric field generation electrode generates an electric field across the liquid crystal layer, and the strength of the electric field is adjusted by varying the voltage. The adjustment of the strength of the electric field adjusts the transmittance of light passing through the liquid crystal layer
Implementation Method 2
a plurality of touch electrodes performing touch sensing... a touch circuit driving a plurality of touch lines connected with the touch electrodes
Data Source
AI summary
Embodiments of the disclosure relate to a touch display device and display panel, and more specifically, to a touch display device and display panel, in which the poor brightness issue may be addressed by evenly arranging the touch lines and contact holes in the touch electrodes positioned in the outer edge of the touch display panel.