Embedded Capacitive Touch Display Panel Gap Alignment
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Solution Overview
Problem
The existing embedded touch screens suffer from visible defects in the patterns of metal touch electrodes due to light reflection issues, which affect display quality, particularly when the gaps between sensing and driving electrodes align with the green color resist bars, leading to highlighted patterns under increased backlight intensity or TFT off-state current.
Innovation Solution
The positions of gaps between sensing and driving electrodes are optimized to avoid alignment with the green color resist bars, ensuring that the gaps are parallel to the green color resist bars, thereby minimizing the visibility of touch electrode patterns and improving display performance without compromising touch functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gaps are formed between sensing electrodes and driving electrodes to achieve insulation, then electrical insulation is improved, but visible pattern defects appear on the display screen due to light reflection
Solution Approach 1:
The patent applies local quality by making the color filter layer non-uniform specifically at the gap regions between electrodes. The color filter material is selectively removed or modified only in the gap areas where light reflection causes visible patterns, while maintaining uniform color filtering in other regions. This localized modification eliminates the harmful visual effect without affecting the overall electrical insulation function of the electrode structure.
Solution Approach 2:
The patent directly addresses the visible pattern defect by modifying the color filter layer's optical properties in the gap regions. By removing or altering the color filter material in these specific areas, the reflection characteristics of light are changed, preventing the formation of visible patterns on the display screen while preserving the electrical insulation provided by the electrode gaps.
2Illumination intensity
If backlight intensity is increased to improve display brightness, then display brightness is improved, but the visibility of touch electrode patterns is enhanced due to increased light reflection
Solution Approach 1:
The patent applies local quality by making the color filter layer non-uniform specifically at the gap regions between electrodes. The color filter material is selectively removed or modified only in the gap areas where light reflection causes visible patterns, while maintaining uniform color filtering in other regions. This localized modification eliminates the harmful visual effect without affecting the overall electrical insulation function of the electrode structure.
Solution Approach 2:
The patent directly addresses the visible pattern defect by modifying the color filter layer's optical properties in the gap regions. By removing or altering the color filter material in these specific areas, the reflection characteristics of light are changed, preventing the formation of visible patterns on the display screen while preserving the electrical insulation provided by the electrode gaps.
3Reliability
If TFT off-state current is increased to improve display performance, then display performance is improved, but the visibility of gaps and electrode patterns is highlighted
Solution Approach 1:
The patent applies local quality by making the color filter layer non-uniform specifically at the gap regions between electrodes. The color filter material is selectively removed or modified only in the gap areas where light reflection causes visible patterns, while maintaining uniform color filtering in other regions. This localized modification eliminates the harmful visual effect without affecting the overall electrical insulation function of the electrode structure.
Solution Approach 2:
The patent directly addresses the visible pattern defect by modifying the color filter layer's optical properties in the gap regions. By removing or altering the color filter material in these specific areas, the reflection characteristics of light are changed, preventing the formation of visible patterns on the display screen while preserving the electrical insulation provided by the electrode gaps.
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 solution effectively reduces the visibility of touch electrode patterns and enhances display quality by adjusting the gap positions relative to the color resist bars, particularly addressing the issue of green color resist contribution to brightness and visibility, thus improving the overall display performance under standard customer backlight specifications.
Implementation Method 1
a color filter layer (25), wherein the color filter layer (25) includes red color resists (R), green color resists (G) and blue color resists (B)
Implementation Method 2
because a light L emitted by a backlight module is irradiated on the metal touch electrode layer 14, the light L is partly reflected on the channels of TFTs
Data Source
AI summary
The application disclose an embedded capacitive touch display panel and an embedded capacitive touch display device, including: a first transparent substrate and a second substrate arranged opposite to each other, a grid-shaped metal conductive layer formed on the first transparent substrate, and a number of force touch detection electrodes independent of each other formed on the second substrate, wherein the embedded capacitive touch display panel further includes a color filter layer including at least red color resists, green color resists, and blue color resists, wherein the color resists in the same colors are arranged in respective color resist bars, and the color resist bars including green color resist resistance strips; and the grid-shaped metal conductive layer includes periodically arranged force touch fixed potential electrodes and floating electrodes, wherein the force touch fixed potential electrodes are separate from the floating electrodes with gaps being formed between them, and the gaps include first gap sections which are parallel to the color resist bars, and which do not overlap with the green color resist resistance strips. Since the green color resists contribute to display brightness far more than the color resists of the other colors, the first gap sections can be arranged so that they do not overlap with the green color resist resistance strips to thereby alleviate the problem of a visible pattern of the grid-shaped metal conductive layer so as to improve the display performance of the embedded capacitive touch display panel without degrading a touch effect.