Display Panel Gamma Deviation Correction via Segmented Timing Controller Data
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Solution Overview
Problem
Display panels produced by the same process exhibit gamma deviation due to varying exposure amounts during thin film transistor manufacturing, and different timing controllers require unique image quality correction data storage addresses, making it difficult to mount different models of timing controllers on the same panel.
Innovation Solution
A display device with a memory storing model correction data and image quality correction data, a correction controller generates final correction data using this information to correct gamma deviation, allowing for the use of various timing controller models on a single display panel by calculating gamma values using equations such as g(x)=CB(x)+d2−TB(x) and f(x)=CA(x)+d1−TA(x), where CB(x) and CA(x) represent center-value gammas, and d2 and d1 represent gamma deviations for different models.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If image quality correction data is stored in memory for a specific timing controller model, then gamma deviation is reduced for that model, but it becomes difficult to mount different models of timing controllers on the same display panel
Solution Approach 1:
The correction data is segmented into two distinct types: model correction data (stored at first addresses) that corrects gray values specific to each timing controller model, and image quality correction data (stored at second addresses) that corrects gamma deviation for the display panel. This segmentation allows each type of correction to be independently managed and applied, enabling both model-specific optimization and multi-model compatibility.
Solution Approach 2:
The system changes the parameter of correction data by introducing model correction data that specifically addresses timing controller model variations. By storing and applying this model-specific correction data alongside the general image quality correction data, the system adapts to different timing controller models while maintaining gamma deviation correction effectiveness.
2Manufacturing precision
If different timing controller models are supported with unique correction data, then image quality is optimized for each model, but device complexity increases due to multiple correction data sets
Solution Approach 1:
Correction data is divided into two segments with distinct functions: model correction data for timing controller model-specific adjustments and image quality correction data for gamma deviation correction. This segmentation simplifies management by clearly defining the purpose and storage location of each correction data type, reducing the complexity of handling multiple correction sets for different models.
Solution Approach 2:
The memory structure is designed to universally support both model correction data and image quality correction data through a unified addressing scheme. The first addresses store model correction data applicable to specific timing controller models, while the second addresses store image quality correction data that can be universally applied across different models, reducing the need for separate correction systems for each model.
Data Source
AI summary
A display device according to some embodiments includes a display panel including a plurality of pixels, a timing controller for correcting an input image signal, and for transmitting the input image to the display panel, a memory for storing model correction data for correcting a gray value, the model correction data corresponding to respective models of a plurality of timing controllers, and for storing image quality correction data for correcting a gamma deviation of the display panel, and a correction controller for generating final correction data by using the model correction data and the image quality correction data, and for transmitting the final correction data to the timing controller.