Display Panel Shift Registers with Resistance Compensation
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Solution Overview
Problem
Irregularly shaped display screens with varying pixel densities lead to inconsistent display brightness due to different scanning line loads, resulting in poor display uniformity.
Innovation Solution
The use of shift registers connected to clock signal lines with resistance compensation units or differing duty ratios to adjust the delay of scan driving signals, ensuring consistent brightness across areas with varying pixel densities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If pixel units are arranged in a rectangular array with the same number of pixel units in each row, then the display area has a regular rectangle shape, but the screen-to-body ratio is reduced and irregular-shaped display screens cannot be achieved
Solution Approach 1:
The display area is divided into multiple rows with different numbers of pixel units, where the first row has a first number of pixel units and the second row has a second number of pixel units that is different from the first number. This segmentation allows the display area to achieve an irregular shape while maintaining a high screen-to-body ratio.
2Area of stationary object
If the number of pixel units in each row is not the same to achieve irregular-shaped display screens, then the screen-to-body ratio is increased, but different scanning lines have different loads leading to inconsistent display brightness
Solution Approach 1:
Different scanning lines are assigned different scanning signal frequencies according to their specific load requirements. Scanning lines with more pixel units receive lower frequencies, while those with fewer pixel units receive higher frequencies. This local adaptation of signal parameters ensures uniform display brightness across the irregular-shaped display area.
Solution Approach 2:
The frequency parameter of the scanning signal is changed for different scanning lines based on the number of pixel units they need to drive. By adjusting the frequency parameter locally, the patent compensates for the different loads on each scanning line, thereby maintaining consistent display brightness throughout the display area.
3Device complexity
If the same scan driving signal is provided to all scanning lines, then the driving circuit is simple, but the display brightness is inconsistent in areas with different pixel densities
Solution Approach 1:
The scanning signal frequency is made dynamic and adaptable rather than fixed. Each scanning line receives a frequency that dynamically adjusts according to its specific load (number of pixel units). This dynamic approach allows the driving circuit to maintain simplicity while achieving uniform display brightness across irregular-shaped areas.
Data Source
AI summary
Provided is a display panel and display device. A display area of a display panel includes a first area and a second area. The number of pixel units in each row in the first area is less than the number of pixel units in each row in the second area. The scanning lines electrically connected to the first shift registers are disposed in the first area, and the scanning lines electrically connected to the second shift registers are disposed in the second area. The first shift registers and the second shift registers are electrically connected to a first clock signal line, and the first shift registers are electrically connected to the first clock signal line through resistance compensation units.