Display Panel Grayscale Compensation for Notch Area Brightness Uniformity
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Solution Overview
Problem
Display panels with irregular shapes face challenges in maintaining uniform brightness across different areas, leading to variations in image display quality.
Innovation Solution
A display apparatus with a compensation circuit that adjusts grayscale values for pixels in normal and notch areas using pixel characteristic data and seed data, ensuring uniform brightness across the display panel by interpolating brightness information and applying offset compensation values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a display panel has an irregular shape with notch parts, then the display area can be increased and device design flexibility is improved, but brightness uniformity deteriorates across different display areas
Solution Approach 1:
The patent applies local quality by dividing the display panel into three distinct display areas (first, second, and third display areas) and applying different grayscale compensation methods to each area. The compensation circuit identifies pixels in each area and applies area-specific compensation values based on pre-stored grayscale compensation data for each display area, thereby achieving uniform brightness across the irregularly shaped panel despite different structural characteristics in each region.
Solution Approach 2:
The patent changes the grayscale parameter of display signals differently for each display area. The compensation circuit adjusts grayscale values by adding area-specific compensation values to input grayscale values, where each display area has its own compensation data stored in memory. This parameter adjustment compensates for the brightness non-uniformity caused by the irregular shape while maintaining the overall display area.
2Device complexity
If grayscale compensation is applied to all display areas using the same method, then implementation complexity is reduced, but brightness uniformity in irregular areas deteriorates
Solution Approach 1:
The patent segments the display panel into three distinct display areas (first, second, and third display areas) with different structural characteristics. The compensation circuit is designed to identify which display area each pixel belongs to and apply corresponding compensation values from pre-stored area-specific grayscale compensation data. This segmentation approach allows the system to handle the complexity of irregular shapes by breaking it down into manageable, area-specific compensation operations.
Data Source
AI summary
A display apparatus includes: a display panel including: a normal part and a notch part; a display area at the normal part and the notch part, the display area comprising a first display area within the normal part, a second display area overlapping the normal part and the notch part, and a third display area within the notch part, each of the normal part and the notch part comprising a plurality of pixels; and a compensation circuit configured to: receive first, second, and third input signals having image information respectively displayed through the first, second, and third display areas; and compensate for a grayscale value of the first, second, and third input signals, wherein the compensation circuit is configured to compensate for the first and third input signals based on pixel characteristic data and compensate for the second input signal based on seed data different from the pixel characteristic data.