Display Panel Wiring Layout for Reduced Picture-Frame Area
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Solution Overview
Problem
Conventional liquid crystal display panels face challenges in reducing the picture-frame area while preventing signal delay, particularly in small and medium-sized displays and large-size panels, due to the large size of transistors and wiring resistance in amorphous silicon thin film transistors and conventional wiring arrangements.
Innovation Solution
The solution involves rearranging trunk and branch wiring in the circuit section of the display panel, with all or part of the trunk wiring placed on the opposed substrate, reducing wiring resistance and area, thereby minimizing the picture-frame area while maintaining signal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the width of trunk wirings is increased to prevent signal delay, then signal integrity is improved, but the picture-frame area is increased
Solution Approach 1:
The patent applies dimensionality change by moving trunk wirings from the circuit substrate to the opposed substrate, utilizing the third dimension (depth/layer) to route signals. This allows trunk wirings to be positioned away from the circuit section area, reducing the picture-frame area while maintaining adequate wiring width for signal integrity. The branch wirings remain on the circuit substrate connecting to the transistor gates, creating a spatial separation that resolves the area contradiction.
2Reliability
If the size of transistors in monolithic circuit section is increased due to low mobility of amorphous silicon, then device performance is maintained, but the picture-frame area is increased
Solution Approach 1:
The patent resolves this contradiction by utilizing the opposed substrate for trunk wirings, effectively moving the wiring function to a different spatial dimension. This allows the circuit section transistors to maintain their necessary size for adequate performance while the overall picture-frame area is reduced through optimized wiring placement on the opposed substrate rather than expanding the circuit section footprint.
3Reliability
If the number of trunk wirings is increased to ensure sufficient signal flow, then signal integrity is improved, but the wiring area and picture-frame area are increased
Solution Approach 1:
The patent applies dimensionality change by routing trunk wirings on the opposed substrate, which allows multiple trunk wirings to be arranged in a compact configuration without increasing the picture-frame area. The opposed substrate provides additional routing space that can accommodate sufficient signal flow requirements while maintaining a compact footprint.
Solution Approach 2:
The patent segments the wiring function by separating trunk wirings (on opposed substrate) from branch wirings (on circuit substrate). This segmentation allows each type of wiring to be optimized independently - trunk wirings can be arranged for compact signal distribution while branch wirings connect to individual transistors, reducing overall wiring area while maintaining signal flow integrity.
Data Source
AI summary
The present invention is to provide a display panel and a display apparatus which can reduce the picture-frame area while sufficiently preventing the delay of signals by allowing a required amount of current to flow. The display panel of the present invention is a display panel which includes a circuit substrate, and an opposed substrate facing the circuit substrate, and which is featured in that the circuit section is arranged in the picture-frame area of the display panel, in that the circuit section includes trunk wiring, and branch wiring connected to the gate electrode or the source electrode of a transistor in the circuit section, and in that all or a part of the trunk wiring is provided on the opposed substrate, and the branch wiring is provided on the circuit substrate so as to be electrically connected to the trunk wiring via a conductor.