Display Device Side-Mounted Circuit Board for Expanded Display Area
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Solution Overview
Problem
Current display device technologies face challenges in increasing the display region area while maintaining efficient electrical connections and reducing the non-display region, particularly in the integration of driving and input sensing units.
Innovation Solution
The display device incorporates a display panel with a driving pad overlapping the non-display region, an input sensing unit with an encapsulation substrate and conductive layer, and a driving circuit board connected via anisotropic conductive films, allowing for expanded display area and improved electrical connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driving circuit board and input sensing unit are disposed on the top surface of the display panel, then electrical connections can be established, but the display region area is reduced
Solution Approach 1:
The patent moves the driving circuit board and input sensing unit from the top surface (2D plane) to the side surface of the display panel, utilizing the third dimension (vertical space). This dimensional transition allows the display region to be maximized on the top surface while electrical connections are established through side surface contacts, effectively resolving the contradiction between connection reliability and display area.
Solution Approach 2:
The patent introduces driving side electrodes and input side electrodes as intermediary elements that extend from the side surface to the top surface. These electrodes serve as mediators that establish electrical connections between the driving circuit board/input sensing unit (on the side surface) and the driving pad/input pad (on the top surface), enabling both compact layout and reliable connectivity.
2Device complexity
If the driving circuit board is disposed on the top surface, then electrical connections are simplified, but the non-display region area increases
Solution Approach 1:
By relocating the driving circuit board to the side surface and using side electrodes for connection, the patent reduces the horizontal footprint required for electrical connections. This dimensional reorganization minimizes the non-display region while maintaining connection functionality, as the connections now utilize vertical space rather than consuming valuable top surface area.
3Reliability
If the input sensing unit is disposed on the top surface, then electrical connections can be established, but the display region area is reduced
Solution Approach 1:
The input sensing unit is relocated from the top surface to the side surface of the display panel, utilizing vertical space for component placement. This allows the display region to be maximized on the top surface while the input sensing unit maintains electrical connections through input side electrodes that extend to the top surface, resolving the contradiction between connection reliability and display area maximization.
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 enables a larger display region by optimizing the placement and connectivity of driving and input sensing components, enhancing the display device's electrical characteristics and reducing the non-display region area.
Implementation Method 1
an anisotropic conductive film that is provided between the driving side electrode and the pad to electrically connect the driving side electrode to the pad
Data Source
AI summary
A display device may include a display panel, an input sensing unit, and a driving circuit board. The display panel includes a base substrate and a driving pad, and the input sensing unit includes an encapsulation substrate and an input pad. The driving circuit board may be provided on one of side surfaces of the base substrate adjacent to the driving pad and on one of connection surfaces of the encapsulation substrate adjacent to the input pad and may be electrically connected to the driving pad and the input pad, respectively.