Touch Control Display Screen Voltage Synchronization
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Solution Overview
Problem
Conventional touch control display screens face issues with non-uniform display effects due to ion accumulation, residual ions from bias voltage, and high manufacturing costs, which affect reliability and display quality, especially under adverse conditions like high temperatures.
Innovation Solution
A touch control display screen design featuring a touch control electrode layer, a first electrode layer, a liquid crystal layer, a switch control circuit, a display control circuit, and a synchronization control circuit, where the synchronization control circuit ensures equal common voltages on both sides of the liquid crystal layer, reducing ion accumulation and simplifying the circuit structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional touch control display screens use bias voltage for touch control, then touch control function is achieved, but ion accumulation occurs causing non-uniform display effects
Solution Approach 1:
The patent applies equipotentiality by making the common voltage of the touch control electrode layer equal to the common voltage of the display electrode layer during display stages. This eliminates potential differences that would otherwise cause ion migration and accumulation, thereby preventing display non-uniformity while maintaining touch control functionality.
Solution Approach 2:
The patent changes the voltage parameter by introducing a synchronization control circuit that dynamically adjusts the common voltage of the touch control electrode layer to match the display electrode layer's common voltage. This parameter adjustment prevents ion accumulation without compromising touch sensitivity or display quality.
2Ease of operation
If separate control circuits are used for display and touch control, then independent control is achieved, but circuit structure complexity increases
Solution Approach 1:
The patent merges the control of common voltages by using a synchronization control circuit that coordinates between the display control circuit and touch control circuit. This allows independent control functionality while reducing overall circuit complexity through voltage synchronization rather than completely separate control paths.
Solution Approach 2:
The synchronization control circuit serves multiple functions: it monitors the display common voltage, adjusts the touch control common voltage accordingly, and ensures both display and touch control operations can proceed with coordinated voltage levels, reducing the need for entirely separate control mechanisms.
3Length of stationary object
If in-cell touch screen structure is used, then thickness is reduced, but display quality and reliability need improvement
Solution Approach 1:
By implementing equipotentiality between the touch control electrode layer and display electrode layer through the synchronization control circuit, the patent eliminates ion accumulation issues that particularly affect thin in-cell structures, thereby improving display quality and reliability while maintaining the thickness advantage of in-cell design.
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 design enhances display quality and reliability by preventing ion accumulation, maintaining performance under adverse conditions, reducing manufacturing costs, and improving light transmittance while maintaining effective touch control functionality.
Implementation Method 1
a liquid crystal layer disposed between the touch control electrode layer and the first electrode layer
Data Source
AI summary
A touch control display screen includes: a touch control electrode layer including a plurality of touch control electrodes; a first electrode layer opposite to the touch control electrode layer and including a plurality of first electrodes; a liquid crystal layer between the touch control electrode layer and the first electrode layer; a switch control circuit connected with at least one touch control electrode; a display control circuit connected with the first electrodes; and a synchronization control circuit connected with the switch control circuit. In the display stage, the display control circuit outputs a first common voltage, and the synchronization control circuit controls the switch control circuit to output a second common voltage equal to the first common voltage. Many advantages are provided, such as a uniform display effect, fewer residual ions, better display quality, higher reliability, simplified circuit, lower cost, and increased light transmittance.