Gamma Debugging Method for Display Panels
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Solution Overview
Problem
The long time required for gamma debugging in production lines reduces production capacity due to the complexity and number of gamma debugging groups needed across various display brightness levels in display panels.
Innovation Solution
A method and apparatus that reduce the number of binding-point grayscales for gamma debugging by determining the duty cycle and gamma data at maximum and minimum display brightness levels, calculating the gamma register value for inserted display brightness levels using a corrected calculation formula based on actual and initial linear data, and determining whether the binding-point grayscale exceeds a preset threshold to streamline the debugging process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of gamma debugging groups is increased to improve image quality, then the image quality of the display panel is improved, but the gamma debugging time in the production line increases, reducing production capacity
Solution Approach 1:
The patent segments the gamma debugging process by identifying key binding-point grayscales (e.g., minimum, maximum, and mid-point brightness levels) rather than debugging all grayscale levels. This segmentation allows the system to achieve adequate gamma correction using fewer debugging groups, thus improving image quality while reducing production time and maintaining production capacity.
2Measurement precision
If gamma debugging is performed at multiple display brightness levels to ensure quality, then the gamma accuracy is improved, but the debugging time increases, affecting production efficiency
Solution Approach 1:
The patent applies preliminary action by pre-calculating the duty cycles for inserted display brightness levels based on the maximum and minimum brightness level data. This allows the system to determine gamma register values for intermediate brightness levels without performing actual debugging at each level, thereby maintaining gamma accuracy while significantly reducing debugging time and improving production efficiency.
3Productivity
If the number of binding-point grayscales for gamma debugging is reduced, then the production capacity is improved, but the gamma debugging accuracy may be compromised
Solution Approach 1:
The patent changes the parameter approach by using a mathematical relationship (duty cycle calculations) to determine gamma register values for intermediate brightness levels based on measurements from only two brightness levels (maximum and minimum). This parameter transformation allows the system to maintain gamma debugging accuracy with fewer binding-point grayscales, thereby improving production capacity without sacrificing precision.
Data Source
AI summary
A gamma debugging method includes: according to a duty cycle and gamma data corresponding to a first display brightness level, and a duty cycle corresponding to a second display brightness level, or according to the duty cycle and the gamma data corresponding to the first display brightness level, and gamma data corresponding to the second display brightness level, determining maximum brightness corresponding to an inserted display brightness level and a duty cycle corresponding to the inserted display brightness level; and determining whether a binding-point grayscale at the inserted display brightness level is greater than a preset grayscale threshold, and when the binding-point grayscale at the inserted display brightness level is greater than the preset grayscale threshold, calculating, according to a preset calculation formula, a gamma register value corresponding to the binding-point grayscale at the inserted display brightness level.