COF Display Panel Wiring Layout for Ultra-Narrow Bezels
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Solution Overview
Problem
Existing display devices face challenges in achieving a narrow-bezel or bezel-free design due to the width of the bezel on the side where the driving integrated circuitry is located, which is intensified by the arrangement of driving integrated circuitry on the display region's side.
Innovation Solution
The implementation of a display panel design that integrates scanning and data driving integrated circuitries on a chip on film (COF) within the non-display region, utilizing separate wirings at different layers to minimize bezel width and reduce signal crosstalk, allowing for a narrow bezel design without affecting normal scanning operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a low voltage is applied to the emission electrode to reduce power consumption, then power consumption is reduced, but the display device cannot be driven at high speeds
Solution Approach 1:
The patent applies different voltages to different regions of the emission electrode. A first voltage is applied to a first region and a second voltage (different from the first) is applied to a second region. This local differentiation allows the emission electrode to achieve both low power consumption in some regions and high driving speed in others, resolving the contradiction between power consumption and driving speed.
2Speed
If a high voltage is applied to the emission electrode to achieve high speed driving, then driving speed is improved, but power consumption increases
Solution Approach 1:
The patent applies different voltages to different regions of the emission electrode. A first voltage is applied to a first region and a second voltage (different from the first) is applied to a second region. This local differentiation allows the emission electrode to achieve both low power consumption in some regions and high driving speed in others, resolving the contradiction between power consumption and driving speed.
3Reliability
If a transparent conductive layer is used to prevent short circuiting, then reliability is improved, but manufacturing complexity increases due to additional layers
Solution Approach 1:
The patent extracts or removes the traditional transparent conductive layer from the display device structure. Instead of using a separate transparent conductive layer to prevent short circuiting, the invention uses the emission electrode itself with its specific voltage application method to achieve both short circuit prevention and the desired display performance, thereby reducing manufacturing complexity.
Data Source
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AI summary
The present disclosure provides a display panel, a method for driving the display panel and a display device. The display panel includes a display region and a non-display region. The non-display region includes a first bonding region, and further includes first connection lines connected to a plurality of gate lines respectively and second connection lines connected to a plurality of data lines respectively. The display panel further includes at least one chip on film, the chip on film includes a second bonding region, a first region, and a second region between the second bonding region and the first region. A scanning driving integrated circuitry connected to the second bonding region via first wirings and a data driving integrated circuitry connected to the second bonding region via second wirings are bonded in the first region. The first wirings and the second wirings are arranged at different layers in the second region. According to the present disclosure, it is able to provide the display device with a narrow bezel as a whole.