Gamma Debugging for Under-Screen Camera Brightness Consistency
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Solution Overview
Problem
The integration of photosensitive components, such as cameras, into display panels with varying light transmittance areas leads to brightness inconsistency between the light-transmitting and main display areas, affecting the all-screen display design and user experience.
Innovation Solution
A method and apparatus for Gamma debugging that selects a test area of the same shape and size as the light-transmitting display area in the main display area, determines target brightness values based on a linear relationship between register values and brightness, and performs Gamma debugging to ensure consistency across both areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If under-screen camera integration is implemented to achieve all-screen display design, then screen-to-body ratio is improved, but brightness consistency between light-transmitting area and main display area deteriorates
Solution Approach 1:
The patent applies local quality by performing Gamma debugging specifically on the light-transmitting display area (first display area) with different characteristics compared to the main display area. The method selects a test area within the main display area that has the same shape and size as the light-transmitting area, and determines target brightness values specifically for the light-transmitting area based on measured present brightness values from the test area. This localized approach addresses the brightness inconsistency in the specific region where the under-screen camera is integrated while maintaining the overall all-screen display design.
2Illumination intensity
If traditional Gamma debugging methods are used to correct brightness inconsistency, then brightness consistency can be improved, but debugging time and process complexity increase
Solution Approach 1:
The patent applies the copying principle by selecting a test area in the main display area (second display area) that has the same shape and size as the light-transmitting display area (first display area). This test area serves as a representative copy that allows indirect measurement of the light-transmitting area's brightness characteristics. By measuring the present brightness value of this copied test area and using it to determine target brightness values for the actual light-transmitting area, the method avoids the need for direct measurement and debugging of the light-transmitting area multiple times, thereby reducing debugging time while maintaining accuracy.
Solution Approach 2:
The patent applies universality by using a single test area measurement to determine target brightness values for multiple register values. The method measures the present brightness value at one specified register value and then calculates target brightness values for multiple different register values based on the linear relationship between register values and brightness. This multi-functional approach allows one measurement to serve multiple debugging purposes, significantly reducing the number of measurements needed and thereby reducing debugging time.
3Manufacturing precision
If multiple brightness measurements are performed to ensure accuracy, then manufacturing precision can be improved, but productivity decreases
Solution Approach 1:
The patent applies parameter changes by utilizing the linear relationship between register values and brightness to calculate target brightness values for multiple register values from a single present brightness value measurement. Instead of performing multiple measurements at different register values, the method changes the approach by using mathematical calculation based on the known linear relationship. This parameter-based calculation method maintains manufacturing precision (brightness calibration accuracy) while significantly improving productivity by reducing the number of physical measurements required.
Data Source
AI summary
A method for Gamma debugging. The method for Gamma debugging is applicable to a display panel including a first display area and a second display area. A light transmittance of the first display area is greater than that of the second display area. The method includes: selecting, in the second display area, a test area having a same shape and size as the first display area; obtaining a first present brightness value when the test area corresponds to a specified register value under a specified grayscale; determining a plurality of first target brightness values when the first display area corresponds to a plurality of register values under the specified grayscale, according to the first present brightness value and a linear relationship between register values and brightness of the display panel; and performing Gamma debugging on the first display area according to the first target brightness values.