Display Module Driving Chip Resistance Equalization
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Solution Overview
Problem
Existing display modules experience ununiform brightness due to differences in resistance values between output terminals and the power-supply chip, leading to issues like screen splitting and decreased image quality.
Innovation Solution
The display module incorporates a configuration where the resistance value between the first output terminal and the power-supply chip is substantially equal to the resistance value between the second output terminal and the power-supply chip, achieved by strategically placing input terminals and signal lines to equalize resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If output terminals are positioned at different distances from the power-supply chip, then device complexity is reduced, but resistance values become ununiform causing brightness inconsistency
Solution Approach 1:
The patent applies equipotentiality by designing signal lines with equal resistance values from the power-supply chip to different output terminals. Specifically, the first signal line connects the first output terminal to the power-supply chip with a first resistance value, and the second signal line connects the second output terminal with a second resistance value, where the first and second resistance values are substantially equal. This ensures uniform power distribution and eliminates brightness inconsistency across the display.
2Illumination intensity
If signal lines are extended to equalize resistance values, then brightness uniformity is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by optimizing the signal line configuration specifically in the bonding region where resistance equalization is needed. The first and second signal lines are routed through the bonding region with carefully controlled resistance values, while other parts of the driving chip maintain their functional simplicity. This localized optimization achieves brightness uniformity without requiring complete redesign of the entire device.
Data Source
AI summary
A display module and a touch display device are provided by the present application, which relates to the technical field of displaying. At least one driving chip is provided within the bonding region. The mainboard includes a power-supply chip. For a same driving chip, a resistance value between a first output terminal of the driving chip and the power-supply chip is substantially equal to a resistance value between a second output terminal of the driving chip and the power-supply chip, wherein the first output terminal refers to the output terminal that has the lowest distance to the first side edge, and the second output terminal refers to the output terminal that has the lowest distance to the second side edge. The display module is used to manufacture a touch display device.