Display Panel Color Cast Compensation via Segmented Pixels
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Solution Overview
Problem
Display panels suffer from non-uniform luminance and severe large viewing angle color cast, which affect the display quality.
Innovation Solution
The display panel architecture includes first and second pixels connected to the same row of data and scan lines, with each pixel type having different charging voltages, utilizing pull-down circuits and capacitors to adjust electrical potentials, allowing for color cast compensation and improved luminance uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional display panel structure is used, then the device complexity is low, but large viewing angle color cast and non-uniform luminance occur
Solution Approach 1:
Each pixel is divided into two sub-pixels: a primary pixel and a secondary pixel. The secondary pixel is connected to a pull-down circuit that includes a capacitor and a switch. This segmentation allows independent voltage control of different pixel types, enabling color cast compensation without requiring completely separate circuit systems for each pixel type.
Solution Approach 2:
Different pixel types (first pixels and second pixels) are assigned different pull-down circuit configurations with different capacitance values. This local differentiation allows each pixel type to be optimized for its specific color characteristics, compensating for color cast in different regions of the display while maintaining overall system functionality.
2Object-affected harmful factors
If pull-down circuits with different capacitances are added to compensate for color cast, then color cast is reduced, but the device complexity increases
Solution Approach 1:
The pull-down circuits in different pixel types serve multiple functions: they maintain baseline voltage levels during normal operation and provide color cast compensation when activated. The capacitors serve both as voltage storage elements and as color compensation elements, reducing the need for separate compensation circuitry.
Solution Approach 2:
The color cast compensation function is merged into the existing pixel structure by integrating pull-down circuits directly into each pixel type. The compensation mechanism is combined with the voltage control function, allowing a single circuit design to achieve both basic pixel operation and color correction.
Data Source
AI summary
The present application discloses a display panel and a display apparatus. The display panel includes: a first substrate, pixels, data lines, and scan lines. The pixels include first pixels and second pixels. The first pixels each include a first primary pixel and first secondary pixel, and the second pixels each include a second primary pixel and a second secondary pixel. The first primary pixel and the first secondary pixel are connected to an nth row of scan line and an nth row of data line, and the second primary pixel and the second secondary pixel are connected to the nth row of scan line and the nth row of data line. The first secondary pixel is connected to a first pull-down circuit, and the second secondary pixel is connected to a second pull-down circuit.