Liquid Crystal Display Matrix Electrode Charge Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for confirming the display state of liquid crystal displays, such as those using camera-based systems or electrostatic capacitance detection, complicate configuration and reduce light transmittance, limiting their applicability to high-luminance or high-resolution displays.
Innovation Solution
A display confirming device that uses a matrix electrode to input signals indicative of electric charges between electrodes, compares these signals with prestored values to determine the display state, eliminating the need for additional elements and cameras, thus simplifying configuration and maintaining high transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a camera-based system is used to confirm display state, then display confirmation can be achieved, but the configuration becomes complicated and requires separate camera and image processing
Solution Approach 1:
The patent combines the display confirmation function with the existing liquid crystal display structure by integrating detection electrodes directly into the display panel. This merging eliminates the need for separate camera and image processing systems, resolving the contradiction between achieving display confirmation and maintaining simple configuration.
Solution Approach 2:
The liquid crystal display performs self-diagnosis by using its own electrode structure to detect display state through electrical measurements. This self-service approach replaces external camera systems, simplifying the overall configuration while maintaining reliable display confirmation.
2Reliability
If electrostatic capacitance detection elements are provided for each pixel circuit, then display confirmation is possible, but light transmittance decreases and pixel density cannot increase
Solution Approach 1:
The patent segments the detection function by using a separate detection electrode structure that operates independently from the pixel circuits. This segmentation allows the detection elements to be positioned without interfering with the optical path and pixel density, resolving the contradiction between display confirmation capability and light transmittance.
Solution Approach 2:
The invention transitions from in-pixel circuit detection to a separate electrode plane for capacitance measurement. This dimensional separation allows detection elements to be placed in a different spatial layer, avoiding obstruction of light and maintaining high pixel density while enabling display confirmation.
3Reliability
If electrostatic capacitance detection elements are provided for each pixel circuit, then display confirmation is possible, but the applicable range to high-luminance or high-resolution displays is limited
Solution Approach 1:
The patent creates a universal detection system using a matrix electrode structure that can be applied to various display types including high-luminance and high-resolution displays. This multi-functional electrode design enables display confirmation across different display specifications, resolving the contradiction between reliability and adaptability.
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 allows for simple and effective display confirmation across a wide range of liquid crystal displays, including high-luminance and high-resolution ones, without the need for separate cameras or additional elements, enhancing applicability and reducing transmittance impact.
Implementation Method 1
a measurement unit for detecting a liquid crystal-aligned state of the display unit, on the basis of a change in electrostatic capacitance
Data Source
AI summary
From a matrix electrode (2) provided for a liquid crystal display, a signal indicative of an amount of electric charges between a pair of electrodes that constitutes the matrix electrode (2) is inputted to an input unit (41). A comparison unit (42) compares that signal with a prestored signal indicative of an amount of electric charges between the pair of electrodes in the matrix electrode (2) measured when displaying has been performed normally by the liquid crystal display. A determination unit (43) determines whether a display on the liquid crystal display is normal or abnormal, using a comparison result by the comparison unit (42).