Touch-Sensing LCD Panel Low-Temperature Baking for Sheet Resistance
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Solution Overview
Problem
Existing touch-sensing liquid crystal panels face performance limitations due to high sheet resistance in their sensing matrices, requiring more power for operation and hindering convenience in touch-sensing applications.
Innovation Solution
A touch-sensing liquid crystal panel is fabricated using low temperature baking technology to form a sensing matrix with indium tin oxide (ITO) having a sheet resistance of 30 ohm/square or less, combined with a color filter substrate and transistor substrate, and a liquid crystal layer, to enhance touch-sensing performance while reducing thickness and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional touch-sensing matrix with higher sheet resistance is used, then manufacturing cost is reduced, but power consumption increases and touch-sensing performance deteriorates
Solution Approach 1:
The patent applies parameter changes by optimizing the sheet resistance of the sensing matrix to a specific range (15-30 ohm/square) and controlling the thickness of the sensing matrix (1000-1400 Angstrom). These parameter adjustments resolve the contradiction by achieving lower power consumption while maintaining reliable touch-sensing performance.
2Use of energy by moving object
If sensing matrix thickness is increased to reduce sheet resistance, then power consumption decreases, but panel thickness increases
Solution Approach 1:
The patent resolves this contradiction by precisely controlling the sensing matrix thickness within the range of 1000-1400 Angstrom. This parameter optimization achieves the dual benefit of reducing sheet resistance (lowering power consumption) while maintaining the thin profile of the display panel.
3Use of energy by moving object
If low temperature baking technology is applied to reduce sheet resistance, then power consumption decreases, but manufacturing process complexity increases
Solution Approach 1:
The patent applies low temperature baking technology with optimized time and temperature parameters to reduce the sheet resistance of the sensing matrix to 15-30 ohm/square. This parameter-optimized process achieves lower power consumption while maintaining ease of manufacture through simplified fabrication steps.
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
The solution results in a touch-sensing liquid crystal panel with improved performance, reduced power consumption, and a thinner, lighter design, addressing the limitations of high sheet resistance in existing panels.
Implementation Method 1
The fabrication method uses low temperature baking technology to form a sensing matrix with lower electrical resistance
Data Source
AI summary
A touch-sensing liquid crystal panel and a fabrication method thereof are provided. The touch-sensing liquid crystal panel includes a color filter substrate, a transistor substrate, and a sensing matrix. In the fabrication method, at first, a first glass substrate is provided. Then, color filters and a common electrode are disposed on a first surface of the first glass substrate to form a color filter substrate. Thereafter, a transistor substrate is combined with the color filter substrate. Then, the glass substrates of the color filter substrate and the transistor substrate are slimed. Thereafter, a sensing layer is formed on a second surface of the first glass substrate, wherein the second surface is opposite to the first surface. Then, the sensing layer is baked to enable a sheet resistance of the sensing matrix to be equal to or less than 30 ohm/square. Thereafter, the sensing layer is patterned.