Detecting Circuit for Early Crosstalk Identification in Display Panels
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Solution Overview
Problem
Conventional detecting circuits for liquid crystal cell tests in display devices can only perform crosstalk detection in later stages of the manufacturing process, leading to increased production costs due to resource consumption and delayed detection of defective products.
Innovation Solution
A detecting circuit with multiple data signal input buses, switching units, and control units that allow for simultaneous control of switching units to display specific detection images for crosstalk detection, enabling early-stage crosstalk detection on display panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If conventional detecting circuits are used for liquid crystal cell test, then the circuit structure is simple, but crosstalk detection can only be performed in later stages of manufacturing process
Solution Approach 1:
The detecting circuit divides switching units into multiple groups (first switching unit group and second switching unit group) corresponding to different data line groups (first data line group for central region, second data line group for peripheral region). Each switching unit group can be controlled independently by separate control units, enabling selective activation of different circuit segments to display specific detection images for crosstalk detection.
Solution Approach 2:
The detecting circuit is designed with multi-functional capability: it can perform both traditional liquid crystal cell testing (displaying pure-color images) and crosstalk detection (displaying specific detection images with central and peripheral regions). The same circuit components (switching units, control units, data signal input buses) serve multiple detection purposes, eliminating the need for separate detection circuits.
2Reliability
If crosstalk detection is performed in later stage of manufacture process, then the detection can be done with existing integrated control circuit, but production cost increases due to resource consumption
Solution Approach 1:
The detecting circuit performs crosstalk detection at an early stage in the manufacturing process, before the integrated control circuit is installed. By conducting detection preliminarily with the standalone detecting circuit, defective display panels are identified and eliminated early, preventing waste of subsequent manufacturing resources and reducing overall production costs while maintaining detection accuracy.
3Adaptability or versatility
If conventional detecting circuit is used, then the circuit operation is simple, but only pure-color images can be displayed not complex detection images
Solution Approach 1:
The circuit divides data lines into first data line group (central region) and second data line group (peripheral region), with corresponding switching unit groups controlled by separate control units. This segmentation enables the circuit to selectively activate different regions and display complex detection images with varying grayscale values in different areas, going beyond simple pure-color image display.
Solution Approach 2:
The detecting circuit employs dynamic control where control units can independently adjust the states of switching units in different groups to display detection images with different grayscale values in central and peripheral regions. This dynamic adaptability allows the same circuit to display various complex detection images for different detection scenarios.
Data Source
AI summary
The present invention provides a detecting circuit, a detecting method and a display device, and the detecting circuit includes data signal input buses, switching units and control units, wherein the data signal input buses are used to provide data signals to the data lines and a predetermined number of data lines corresponding to a central region of the display panel constitute a first data line group; the switching units are arranged between the data lines and corresponding data signal input buses, all of which are divided into two switching unit groups, and all switching units in correspondence with the data lines in the first data line group constitute a first switching unit group; and the control units are used to control all switching units of corresponding switching unit groups to be turned on or turned off simultaneously.