LCD Data Compensation for Rising Bounce and Luminance Drop
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Dynamic capacitance compensation (DCC) in liquid crystal display (LCD) technologies leads to overshooting and subsequent luminance drops, resulting in visible blurring and degraded display quality when gray scales rapidly change, as seen in the rising bounce characteristics.
Innovation Solution
A method and apparatus for data compensation that converts image data into pre-compensation data with a lower gray scale and generates compensation data with a higher gray scale, using pre-compensation data from the previous frame, to gradually adjust and improve the rising bounce characteristics of liquid crystals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If dynamic capacitance compensation (DCC) is applied to improve response time, then rising response time is improved, but luminance drops in subsequent frames causing display quality degradation
Solution Approach 1:
The patent applies preliminary action by pre-compensating the present frame data signal before it is applied to the liquid crystal material. The pre-compensation process adjusts the gray scale of the present frame based on the previous frame data, preparing the signal in advance to prevent overshooting and subsequent luminance drops, thereby improving both response time and display quality.
2Speed
If DCC overshoots gray scale to improve rising response time, then response time is improved, but luminance level drops requiring 7-8 frames to recover
Solution Approach 1:
The patent applies preliminary anti-action by pre-compensating the present frame data signal to counteract the potential overshooting effect before it occurs. The pre-compensation process adjusts the gray scale based on the difference between present and previous frame data, creating a compensatory signal that prevents the luminance drop and reduces recovery time from 7-8 frames to approximately 3 frames.
3Speed
If DCC is applied to liquid crystal material, then response characteristics are improved, but rising bounce occurs degrading display quality
Solution Approach 1:
The patent eliminates rising bounce by applying preliminary compensation to the present frame data signal. The pre-compensation process adjusts the gray scale of the present frame based on the previous frame data, preparing the signal in advance to prevent overshooting and subsequent luminance drops, thereby improving both response time and display quality.
Data Source
AI summary
A method for compensating data for a data compensating apparatus in a display apparatus includes converting image data of an n-th frame (where “n” is a natural number) into pre-compensation data of the n-th frame having a gray scale less than or equal to a gray scale of the image data of the n-th frame based on pre-compensation data of an (n−1)-th frame, storing the pre-compensation data of the n-th frame, and generating compensation data of the n-th frame having a gray scale greater than or equal to the gray scale of the image data of the n-th frame by using the image data of the n-th frame and the pre-compensation data of the (n−1)-th frame.