Display Substrate Coupling Circuit for Inspection Terminal Management
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Solution Overview
Problem
The increasing demand for higher-density display devices with more video and scan lines poses challenges in efficiently disposing of terminals and circuits for inspection, particularly in portable devices with narrower bezels, where the existing configurations become difficult to manage effectively.
Innovation Solution
A display device configuration that includes a first substrate with a display region, partial peripheral regions for signal lines and terminals, and a coupling circuit that switches between coupling and decoupling signal lines and inspection terminals, allowing for efficient electrical coupling and inspection signal supply, thereby optimizing the layout and reducing bezel width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of video signal lines and scan lines is increased to achieve higher definition, then the display resolution is improved, but the number of pins of driver ICs increases making the terminal disposal more difficult
Solution Approach 1:
The invention divides the terminal disposal into two separate regions: a first partial peripheral region for signal line terminals and a second partial peripheral region for inspection terminals. This segmentation allows independent optimization of each region, reducing the complexity of terminal disposal while maintaining high display resolution through increased signal lines.
2Adaptability or versatility
If the terminals and circuit for panel inspection are added, then the inspection capability is improved, but the bezel width increases which is undesirable for portable devices
Solution Approach 1:
The invention utilizes the peripheral region dimension of the substrate to dispose inspection terminals separately from the main display area. By placing inspection terminals in the second partial peripheral region and using a coupling circuit to connect them, the inspection functionality is added without increasing the main display area or bezel width.
3Device complexity
If the first terminals and second terminals are always coupled, then the signal transmission is simplified, but the inspection signal cannot be supplied to the signal lines
Solution Approach 1:
The invention employs a coupling circuit with switching capability that can dynamically change the connection state between first terminals and second terminals. The coupling circuit can switch between coupling the signal lines to first terminals for normal operation and coupling them to second terminals for inspection, providing both simplified signal transmission and inspection capability as needed.
Data Source
AI summary
According to an aspect, a display device includes: a first substrate having a first side and a second side opposed to the first side; a display region provided with pixels; a first partial peripheral region between the first side and the display region; a second partial peripheral region between the second side and the display region; a plurality of signal lines configured to supply signals to switching elements in the pixels; a plurality of first terminals provided in the first partial peripheral region and configured to be electrically coupled to a driver integrated circuit; a plurality of second terminals provided in the second partial peripheral region and configured to be supplied with signals for inspection; and a first coupling circuit provided between the first terminals and the display region in the first partial peripheral region and configured to switch between coupling and decoupling the signal lines and the second terminals.