Display Panel Regional Passivation Thickness for Lower Driving Voltage
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Solution Overview
Problem
The high power consumption of display screens in mobile devices is a significant challenge due to the large thickness of insulating layers between the pixel and common electrodes, requiring high driving voltages.
Innovation Solution
A display panel design with a light-transmitting region and a light-shielding region, featuring a thinner passivation layer in the light-transmitting region compared to the light-shielding region, and a common electrode directly on the gate insulating layer, reducing the insulating layer thickness and driving voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a thick passivation layer is used to protect the data line, then the reliability is improved, but the power consumption increases due to higher driving voltage requirements
Solution Approach 1:
The passivation layer is designed with different thicknesses in different regions: a first thickness in the light-transmitting region and a second thickness in the light-shielding region. This local differentiation allows the data line to be adequately protected where needed while reducing the overall capacitance and driving voltage requirements, thereby lowering power consumption.
2Manufacturing precision
If a thick insulating layer is used between pixel and common electrodes, then the manufacturing precision is improved, but the device complexity increases due to higher driving voltage requirements
Solution Approach 1:
The gate insulating layer and passivation layer are designed with different thicknesses in different regions. The gate insulating layer has a first thickness in the light-transmitting region and a second thickness in the light-shielding region, while the passivation layer similarly varies thickness. This local quality approach maintains adequate insulation where needed while reducing overall capacitance and simplifying driving voltage requirements.
Data Source
AI summary
The present application provides a display panel and a manufacturing method thereof, and an electronic device. The display panel includes a light-transmitting region and a light-shielding region disposed at a periphery of the light-transmitting region. A thickness of a passivation layer of the display panel in the light-transmitting region is less than a thickness of the passivation layer in the light-shielding region, so as to reduce a thickness of an insulating layer between a pixel electrode and a common electrode. In this way, when a certain electric field is formed, a driving voltage which is required can be reduced, so as to reduce power consumption of the display panel, thereby alleviating an urgent need to reduce power consumption of display screen in prior art.