Side Connection Structure for Display Device Bezel Reduction
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Solution Overview
Problem
Conventional display devices have a wide bezel width due to signal transmission lines being placed in the non-display area, which affects the display's aesthetic appeal and functionality.
Innovation Solution
The display device incorporates a side connection structure where data and gate signal lines are routed within the display area, reducing the non-display area width by using flexible films and anisotropic conductive films to connect the driving chips to the display panel, and a signal controller for brightness compensation to maintain uniform brightness across the panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If signal transmission lines are placed in the non-display area, then electrical connection between driving chip and display panel is achieved, but bezel width increases
Solution Approach 1:
The patent transitions signal transmission from the horizontal plane (non-display area) to the vertical dimension by routing lines through the thickness of the display panel. The first and second signal lines extend from the first substrate through the panel thickness to the second substrate, enabling electrical connection without occupying lateral space in the non-display area, thus reducing bezel width while maintaining reliable signal transmission.
Solution Approach 2:
The patent embeds signal transmission lines within the layered structure of the display panel itself. The signal lines are nested between the first and second substrates, utilizing the internal volume of the panel structure. This nesting approach allows electrical connection functionality to be integrated within the panel's existing form factor without adding external width.
2Length of stationary object
If signal lines are routed within the display area, then non-display area width is reduced, but brightness uniformity deteriorates
Solution Approach 1:
The patent applies different properties to different regions: the first signal line region has adjusted aperture ratio or brightness characteristics compared to other display areas. By allowing local variations in brightness or aperture ratio specifically where signal lines are present, the patent maintains overall brightness uniformity perception while enabling signal lines to pass through the display area without requiring increased bezel width.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration reduces the bezel width, enhances the display's appearance, and ensures consistent brightness by compensating for the reduced aperture ratio in signal line areas, thereby improving overall display quality.
Implementation Method 1
The driving chip is bonded to the display panel using an anisotropic conductive film (ACF)
Implementation Method 2
data and gate signal lines are routed within the display area, reducing the non-display area width by using flexible films and anisotropic conductive films to connect the driving chips to the display panel
Data Source
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AI summary
A display device includes a display panel, a first flexible film, and a second flexible film. The display panel includes a non-display area outside a display area. The first flexible film is attached to a first side surface of the display panel. The second flexible film is attached to a second side surface of the display panel. The display panel includes a signal line, a pad electrode, and a side surface connection electrode. The signal line is in the display area and connects the first and second flexible films. The pad electrode extends from the signal line. The side surface connection electrode is on the first and second side surfaces and directly contacts the pad electrode. The first flexible film and the second flexible film are coupled to the side surface connection electrode and are electrically connected to the signal line.