Pixel Circuit Brightness Detection Using Integrated Detection Boards
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Solution Overview
Problem
Conventional micro-light emitting diode displays cannot detect abnormal pixel circuits during manufacturing, leading to wasted time and resources due to continued processing of defective circuits.
Innovation Solution
A pixel detection device and method utilizing a first substrate with sub-pixel circuits, detection transistors, and detection boards to switch voltage levels and conduct light emitting elements for abnormality detection, allowing detection during manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pixel circuits are matched with sub-pixel circuits for detection during manufacturing, then detection capability is improved, but device complexity and process time increase
Solution Approach 1:
The patent introduces a detection board as an intermediary component that mediates between the pixel circuit and the testing system. The detection board includes a detection transistor coupled to the light emitting element, allowing abnormality detection without requiring complex matching with sub-pixel circuits. This intermediary structure simplifies the overall detection system while maintaining reliable detection capability.
2Reliability
If pixel circuits are matched with sub-pixel circuits for detection during manufacturing, then detection capability is improved, but manufacturing time increases
Solution Approach 1:
The detection transistor and detection board are integrated into the pixel circuit structure during the manufacturing process itself, rather than requiring separate matching and testing steps. The detection circuit is prepared in advance as part of the manufacturing process, enabling immediate detection without additional time-consuming matching operations.
3Measurement precision
If voltage levels are switched to control detection transistor and light emitting element, then detection precision is improved, but energy consumption increases
Solution Approach 1:
The detection process uses periodic voltage switching with distinct time stages. During the first sub-stage of the first stage, the first detecting signal switches voltage levels to control the detection transistor, and during the second sub-stage, the second detecting signal switches voltage levels to control the light emitting element. This periodic action allows precise brightness detection through controlled voltage transitions while managing energy consumption through time-based control.
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
Enables detection of abnormal pixel circuits during manufacturing, preventing further processing of defects and saving time and resources.
Implementation Method 1
The first detection transistor and the first light emitting element are conducted according to the first voltage and the second voltage to light up the light emitting element
Data Source
AI summary
A pixel detection device includes a substrate. Substrate includes a sub-pixel circuit, a detection transistor, and two second detection boards. Sub-pixel circuit includes a light emitting element. First detection board is coupled to detection transistor. Second detection board is coupled to light emitting element. First detection board outputs a first detecting signal in a sub-stage of a stage, and first detecting signal is switched from a first voltage level to a second voltage level to control a first voltage of detection transistor. Second detection board outputs a second detecting signal at sub-stage, and second detecting signal is switched from second voltage level to first voltage level to control a second voltage of first light emitting element. Detection transistor and light emitting element are conducted according to first voltage and second voltage to light up light emitting element, so as to detect whether brightness of light emitting element is abnormal.