Display Inspection Circuit Current Balance
Solution Overview
Problem
In large-sized display devices with multiple driver ICs, imbalanced current flowing through inspection circuits leads to uneven luminance during inspection, reducing accuracy and reliability.
Innovation Solution
A display device configuration with first and second driver terminals, inspection switches, and inspection terminals arranged in specific regions to allow for balanced current supply and switching, preventing imbalances in signal lines during inspection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple driver ICs are mounted on a large-sized display device with corresponding inspection circuits, then the display device can perform inspection functions, but imbalanced current flows through the inspection circuits causing uneven luminance and reducing inspection accuracy
Solution Approach 1:
The inspection terminal is divided into multiple inspection terminals (first inspection terminal and second inspection terminal) located in different peripheral regions. Each inspection terminal is coupled to a separate inspection circuit, allowing independent current control and balancing across multiple driver ICs to prevent luminance unevenness.
Solution Approach 2:
Different inspection terminals are provided in specific peripheral regions (first peripheral region and second peripheral region) corresponding to different driver ICs. This local arrangement allows tailored inspection current distribution to each region, compensating for imbalances and ensuring uniform luminance across the display.
2Reliability
If inspection terminals are provided in multiple peripheral regions with inspection switches, then balanced current distribution can be achieved, but the device complexity increases
Solution Approach 1:
The inspection switch can operate in multiple modes: coupling the inspection terminal to the signal line for inspection, or interrupting the connection to prevent inspection current from reaching certain regions. This multi-functionality allows a single switch component to achieve balanced current distribution without requiring complex multi-component circuits.
Solution Approach 2:
The inspection switch dynamically adjusts the connection state between inspection terminals and signal lines based on inspection requirements. By switching between coupled and interrupted states, the system can adaptively control current flow to maintain balance while simplifying the overall circuit configuration.
Data Source
AI summary
A display device includes signal lines, first driver terminals that are provided in a first peripheral region and to which a first driver IC can be coupled, second driver terminals to which a second driver IC can be coupled, a plurality of inspection terminals provided in the first peripheral region, first inspection switches coupled to the first driver terminals and configured to be capable of switching coupling and interruption of the inspection terminals and the signal lines, and second inspection switches coupled to the second driver terminals and configured to be capable of switching coupling and interruption of the inspection terminals and the signal lines.