Touch Control Display Panel Narrow Bottom Border Design
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Solution Overview
Problem
The existing rigid AMOLED display screens face challenges in achieving a narrow bottom border due to the need for wiring and bonding of components such as COG chips, FPC boards, and touch control drivers, which occupy significant space, making it difficult to reduce the width of the bottom border.
Innovation Solution
The FPC touch control driver bonding area and COF display driver bonding area are arranged side by side, with the border area extended along a first direction and the display area along a second direction perpendicular to it, allowing for a more compact layout and reduced border width by optimizing the placement and cutting precision of these components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the COG chip, FPC board, and touch control driver are bonded at the bottom border area, then the display screen can achieve high image quality and touch control functionality, but the bottom border width cannot be reduced below 0.85 mm
Solution Approach 1:
The patent relocates the bonding areas from the bottom border to the side borders (left and right borders) of the display screen. Specifically, the COG chip is bonded to the left border, the FPC board is bonded to the right border, and the touch control driver is distributed across both side borders. This dimensional redistribution from vertical (bottom border) to horizontal (side borders) placement enables the bottom border width to be reduced to less than 0.85 mm while maintaining all necessary bonding functions.
2Ease of manufacture
If the bottom border is used for wiring and bonding of COG chip, FPC board, and touch control driver, then all components can be connected, but the bottom border becomes the main bottleneck for achieving narrow border design
Solution Approach 1:
The patent segments the bonding functions that were previously concentrated at the bottom border and distributes them across multiple locations: the COG chip is bonded to the left border, the FPC board is bonded to the right border, and the touch control driver is divided and bonded across both side borders. This segmentation of bonding locations eliminates the bottleneck at the bottom border while maintaining all necessary component connections and wiring functionality.
3Productivity
If the display screen uses traditional bottom-border bonding configuration, then all components can be properly connected, but the screen-to-body ratio cannot be maximized due to wide bottom border
Solution Approach 1:
The patent moves the bonding operations from the vertical dimension (bottom border) to the horizontal dimension (side borders). By placing the COG chip, FPC board, and touch control driver connections along the left and right borders instead of the bottom border, the display screen achieves a bottom border width of less than 0.85 mm, thereby maximizing the screen-to-body ratio and enabling narrow border design.
Data Source
AI summary
A touch control display panel includes a display area and a border area, wherein the border area is extended along a first direction, and the border area and the display area are arranged along a second direction perpendicular to the first direction. The border area includes a flexible-printed-circuit (FPC) touch control driver bonding area and a chip-on-film (COF) display driver bonding area, wherein the FPC touch control driver bonding area and the COF display driver bonding area are arranged along the first direction.