Display Device Dynamic Gray Scale Compensation
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Solution Overview
Problem
Display devices face image quality deterioration when displaying images with variable scan rates that differ from their driving frequency, leading to issues like character drag and motion blur.
Innovation Solution
A display device with a memory to store compensation values for gray scale changes, a timing controller, and a processor that adjusts the display based on the driving frequency and frame frequency of the input image, using dynamic capacitance compensation values to ensure accurate gray scale representation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the display panel uses a fixed driving frequency, then the display device can maintain stable operation, but it cannot properly display images with variable scan rates, leading to image quality deterioration
Solution Approach 1:
The patent applies dynamics by making the gray scale compensation values adjustable based on the input image's frame frequency. The timing controller dynamically selects appropriate compensation values from memory based on the detected frame rate, allowing the display system to adapt to variable scan rates while maintaining stable operation through frequency-appropriate compensation
Solution Approach 2:
The patent changes the parameter of gray scale compensation values according to the input frame frequency. Different compensation values are stored in memory for different frequency ranges, and the timing controller selects the appropriate compensation values based on the detected frame rate, thereby resolving the contradiction between fixed driving frequency and variable scan rate compatibility
2Manufacturing precision
If tuning is performed for all frames of variable scan rate images, then image quality can be maintained, but the complexity of the display device increases
Solution Approach 1:
The patent applies partial action by performing gray scale compensation only when necessary - specifically when the input frame frequency differs from the panel's native refresh rate. The timing controller detects the frame rate and applies compensation values selectively based on frequency mismatch, avoiding unnecessary processing complexity when the scan rates already match
Solution Approach 2:
The patent uses preliminary action by pre-calculating and storing compensation values for various frame frequency scenarios in memory before operation. The timing controller simply retrieves the appropriate pre-computed compensation values based on detected frame rates, avoiding complex real-time calculations and reducing processing complexity
Data Source
AI summary
A display device is disclosed. The display device comprises: a display panel; a memory storing information on a compensation value according to a change in gray scale of an input image, which is preconfigured according to a driving frequency of the display panel; a timing controller for controlling the display panel to display a current frame of the input image, on the basis of information stored in the memory; and a processor for acquiring a target gray scale value of the current frame on the basis of a frequency of the current frame, acquiring a compensation value corresponding to the acquired target gray scale value, and controlling the timing controller to display the current frame on the basis of the acquired compensation value.