Liquid Crystal Display Module Bonding Area Reduction
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Solution Overview
Problem
Existing liquid crystal display module designs require additional pads and circuit lines for testing, increasing the bonding area and occupying more space, which hinders the miniaturization of the driver IC and flexible printed circuit board.
Innovation Solution
A liquid crystal display module with a testing pad and two sub-pads on the panel, and three pads on the driver IC, where the sub-pads are bonded to one of the IC pads to achieve a short circuit, reducing the number of pads and bonding area needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional circuit lines and bonding pads are added to short unnecessary circuits through the flexible printed circuit board, then the shorting function is achieved, but the bonding area increases and occupies more space
Solution Approach 1:
The patent merges the shorting function with the existing bonding structure by making the first and second sub-pads coincide with a third pad on the driver IC. This allows the shorting of unnecessary circuits to be achieved through the bonding connection itself, without requiring additional circuit lines or bonding pads on the flexible printed circuit board, thereby resolving the contradiction between achieving the shorting function and minimizing the bonding area
2Reliability
If more pads are used for bonding the driver IC or flexible printed circuit board, then the shorting function is achieved, but the number of pads does not decrease and the area of the flexible printed circuit board does not reduce
Solution Approach 1:
The third pad on the driver IC serves multiple functions: it acts as a bonding pad for connecting to the liquid crystal display panel and simultaneously serves as a shorting path for unnecessary circuits. This multi-functionality eliminates the need for separate dedicated shorting pads, thereby reducing the total number of pads required and resolving the contradiction between achieving the shorting function and reducing device complexity
Data Source
AI summary
The present disclosure provides a liquid crystal display module, which includes a liquid crystal display panel and a driver integrated circuit, wherein the liquid crystal display panel includes a testing pad, a first pad and a second pad, the first pad includes a first sub pad and a second sub pad which are separately disposed, the second sub pad is electrically connected to the testing pad, the driver integrated circuit includes at least two third pads, the third pads are respectively bonded to the first pad and the second pad; the first sub pad and the second sub pad are commonly bonded to one of the third pads, so as to achieve a short circuit between the first sub pad and the second sub pad. In the liquid crystal display module of the present disclosure, the space occupied by the bonding area is small.