Gate Driving Circuit for Display Device with Optical Sensor Integration
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Solution Overview
Problem
The challenge is to integrate an optical sensor into the active area of a display panel without degrading the image quality, as existing methods limit the size of the non-active area and compromise image display when the sensor is placed in the active area.
Innovation Solution
The solution involves creating a display device with distinct areas of different resolutions within the active area, allowing the optical sensor to be placed in a low-resolution area with increased transmissivity, while separate gate lines drive the low-resolution and high-resolution areas independently to minimize image quality differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the optical sensor is disposed in the non-active area, then the non-active area size is reduced, but the ability to reduce the non-active area is limited
Solution Approach 1:
The active area is segmented into a first area with first resolution and a second area with second resolution higher than the first resolution. The optical sensor is disposed in an area overlapping the first area, allowing the sensor to be integrated within the active area while maintaining distinct functional zones for imaging and sensing.
2Area of stationary object
If the optical sensor is disposed in the active area, then the non-active area can be reduced, but the image quality is degraded
Solution Approach 1:
Different areas of the display panel are assigned different resolution qualities. The first area has lower resolution to accommodate the optical sensor, while the second area maintains higher resolution for primary display purposes. This local differentiation allows the sensor to be integrated without compromising the overall image quality of the high-resolution regions.
Solution Approach 2:
The gate driving circuit dynamically controls different gate lines for different areas. A first gate driver drives gate lines for the first area, and a second gate driver drives gate lines for the second area, allowing independent control and optimization of each region's performance characteristics.
3Manufacturing precision
If separate gate lines are used for different areas, then image quality difference is reduced, but the device complexity increases
Solution Approach 1:
The gate driving circuit is segmented into multiple independent gate drivers. A first gate driver is configured to drive gate lines for the first area, and a second gate driver is configured to drive gate lines for the second area. This segmentation allows independent optimization of driving parameters for each region while maintaining manageable circuit complexity through modular architecture.
Data Source
AI summary
Provided are a gate driver and a display device. A low-resolution area is disposed in a portion of an active area, and an optical sensor is disposed on a side of the low-resolution area opposite to a surface of the low-resolution area on which an image is displayed, such that the display device displays images on the low-resolution area and performs sensing using the optical sensor. The low-resolution area and a high-resolution area surrounding the low-resolution area are driven using different gate lines. Image compensation for the low-resolution area is easily performed to reduce or remove the difference in the image quality between the low-resolution area and the surrounding areas.