Integrated Touch Sensing Common Electrode for Liquid Crystal Display
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Solution Overview
Problem
The existing liquid crystal display devices with integrated touch screens suffer from increased thickness, complex manufacturing processes, and higher costs due to the separate formation of touch screens on the liquid crystal panels.
Innovation Solution
Incorporating a sensing electrode into the liquid crystal panel by arranging gate and data lines to form pixels, using a common electrode for both electric field formation and touch sensing, and employing a discontinuous sensing line connected by a jump line with additional connection electrodes to sense user input without a separate touch screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a separate touch screen is formed on the liquid crystal panel, then touch sensing capability is achieved, but the overall thickness of the device is increased
Solution Approach 1:
The patent merges the touch screen structure with the liquid crystal panel by integrating the sensing electrode into the common electrode layer of the liquid crystal display. This combination eliminates the need for a separate touch screen assembly, thereby reducing overall device thickness while maintaining touch sensing functionality.
Solution Approach 2:
The common electrode is designed to serve dual functions: forming the electric field necessary for liquid crystal operation and acting as a sensing electrode for touch input detection. This multi-functionality eliminates the need for dedicated touch screen components, reducing thickness while achieving both display and touch capabilities.
2Adaptability or versatility
If a separate touch screen is formed on the liquid crystal panel, then touch sensing capability is achieved, but manufacturing process complexity is increased
Solution Approach 1:
By combining the touch sensing function with the liquid crystal panel's common electrode, the patent reduces the number of separate components and assembly steps. The sensing electrode is formed as part of the existing liquid crystal panel manufacturing process, eliminating the need for separate touch screen fabrication and integration.
Solution Approach 2:
The common electrode performs both its traditional function of creating the electric field for liquid crystal switching and serves as the sensing electrode for touch input. This dual functionality simplifies the manufacturing process by eliminating the need to produce and assemble a separate touch screen component.
3Adaptability or versatility
If a separate touch screen is formed on the liquid crystal panel, then touch sensing capability is achieved, but manufacturing cost is increased
Solution Approach 1:
The patent combines the touch sensing function with the liquid crystal panel structure, eliminating the need for separate touch screen components. This integration reduces material costs and manufacturing expenses associated with producing and assembling separate touch screen assemblies.
Solution Approach 2:
The common electrode serves dual purposes as both the electric field generator for liquid crystal operation and the sensing electrode for touch input detection. This multi-functionality reduces the total number of components required, thereby lowering material costs and manufacturing expenses.
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 approach reduces the overall thickness of the liquid crystal display device, simplifies the manufacturing process, and lowers production costs while maintaining effective touch sensing capabilities.
Implementation Method 1
an alignment state of liquid crystal molecules in the liquid crystal layer is controlled based on whether or not an electric field is applied thereto, and light transmittance is controlled according to the alignment state of liquid crystal molecules
Implementation Method 2
capacitance between the first sensing electrode 24 and the second sensing electrode 26 is varied at the touched position. As a result, the position where capacitance is varied is sensed, whereby the touch position of the user can be sensed
Data Source
AI summary
A liquid crystal display device and a method for manufacturing the same are disclosed. The liquid crystal display device comprises gate and data lines arranged to cross each other on a substrate to define a plurality of pixels; a pixel electrode formed in each of the plurality of pixels; a common electrode forming an electric field together with the pixel electrode, patterned to sense a touch of a user; a sensing line discontinuously formed on the common electrode and electrically connected with the common electrode; a jump line formed below the common electrode to electrically connect discontinuous portions of the sensing line with one another; and first and second connection electrodes for electrically connecting the jump line with the sensing line, wherein the first connection electrode is connected with the jump line, and the second connection electrode is connected with the sensing line and the first connection electrode respectively.