Display Device Signal Line Bridge for Bezel Reduction
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Solution Overview
Problem
Conventional LCD devices face limitations in reducing the size of the bezel due to the complexity of the GIP circuit block and signal line formation, which increases the non-display area and restricts the miniaturization of the display device.
Innovation Solution
The solution involves forming signal lines for the gate lines on the second substrate, where the gate lines are not present, and using bridges to connect these signal lines to the connection lines and pads on the first substrate, thereby reducing the non-display area and bezel size, while maintaining electrical connectivity through specific contact holes and protrusions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If signal lines and GIP circuit blocks are formed on the first substrate, then electrical connectivity is achieved, but the non-display area increases and bezel size cannot be reduced
Solution Approach 1:
The patent moves the signal lines from the first substrate to the second substrate, utilizing the third dimension (depth/layering) of the display structure. By forming signal lines on the rear surface of the second substrate and using bridge structures that extend through the substrate thickness, the patent achieves electrical connectivity without occupying non-display area on the first substrate, thus reducing bezel size while maintaining reliability.
Solution Approach 2:
The patent introduces bridge structures as intermediary elements that connect the signal lines on the second substrate to the gate lines on the first substrate. These bridges act as mediators, transferring electrical signals across the substrate interface without requiring direct planar connection on the first substrate, thereby enabling bezel reduction while preserving electrical connectivity.
2Device complexity
If GIP circuit blocks are formed on the first substrate, then gate driver functionality is achieved, but the device complexity increases
Solution Approach 1:
The patent extracts the signal line formation process from the first substrate manufacturing sequence and relocates it to the second substrate. By taking out the signal lines from the first substrate's circuit configuration, the patent simplifies the overall device structure, reduces the number of layers required on the first substrate, and makes the manufacturing process more straightforward while maintaining all necessary gate driver functionalities.
3Length of stationary object
If signal lines are formed on the first substrate, then electrical connection is established, but the bezel thickness increases
Solution Approach 1:
The patent utilizes the vertical dimension by forming signal lines on the rear surface of the second substrate and employing bridge structures that extend through the substrate thickness. This three-dimensional approach establishes electrical connections without increasing the horizontal bezel thickness, as the connections are achieved through depth rather than lateral extension.
Data Source
AI summary
Disclosed is a display device. The display device includes first and second substrates, a plurality of gate lines and data lines, a connection line, a signal line, and a first bridge. The first and second substrates face each other. The gate lines and data lines are formed on the first substrate to define a plurality of pixels by an intersection therebetween. The connection line is formed on the first substrate to be electrically connected to the gate line. The signal line is formed on the second substrate for supplying a signal to the gate line. The first bridge is formed on the second substrate for electrically connecting the signal line and the connection line.