Flat Panel Display Defect Compensation Circuit
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Solution Overview
Problem
Flat panel display devices face limitations in improving picture quality due to panel defects, as existing repair processes only partially recover defects and often result in noticeable differences in brightness or chromaticity between defect and non-defect areas, leading to suboptimal display performance.
Innovation Solution
A flat panel display device and method that utilize compensation data to adjust brightness and color information for defect areas, boundary regions, and linked pixels, using a compensation circuit to modulate data and improve picture quality by calculating and applying first, second, and third compensation data to specific areas of the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a repair process is carried out to recover panel defects, then some panel defects can be recovered, but the brightness or chromaticity of the defect area remains different from the non-defect area
Solution Approach 1:
The patent modifies display parameters (brightness and chromaticity) by applying compensation data to defect areas. The compensation circuit adjusts the display parameters of pixels in defect areas based on compensation values stored in memory, thereby changing the optical characteristics to match surrounding non-defect areas without physical repair.
Solution Approach 2:
The patent introduces a compensation circuit and compensation data as an intermediary between the display panel and the viewer. Instead of directly repairing the physical defect, the system uses software-based compensation values to mediate the visual appearance, masking the defect through parameter adjustment rather than physical modification.
2Reliability
If defect pixels are turned into dark points through repair process, then defect pixels are compensated, but dark points are clearly perceived in intermediate and white gray levels
Solution Approach 1:
Instead of converting defect pixels to dark points (fixed parameter change), the patent dynamically adjusts the brightness parameter of defect pixels using compensation data. This allows the defect pixels to adapt their brightness level according to the surrounding area and display content, preventing the formation of perceptible dark points while maintaining reliability of defect compensation.
3Manufacturing precision
If compensation data is applied to defect areas, then picture quality is improved, but device complexity increases due to additional compensation circuit and memory
Solution Approach 1:
The patent introduces a compensation circuit and memory as intermediary components that process and store compensation data. These intermediaries act as a buffer between the display panel and the control system, enabling picture quality improvement through data manipulation without requiring complex hardware modifications to the display panel itself.
Solution Approach 2:
The patent replaces physical repair mechanisms (mechanical/system-level intervention) with software-based compensation data processing. Instead of using complex repair processes involving multiple manufacturing steps, the system substitutes a simpler electronic compensation approach that uses memory storage and circuit-based data adjustment to achieve picture quality improvement.
Data Source
AI summary
This invention relates to a flat panel display device that is adaptive for optimizing data, which are to be displayed in a panel defect area, in used of a compensation value of a compensation circuit as well as compensating defect pixels by a repair process, and a method of controlling a picture quality thereof. A flat panel display device according to an embodiment of the present invention includes a display panel; a memory which stores a first compensation data, a second compensation data and a third compensation data; a first compensation part; a second compensation part; a third compensation part; and a driver for driving the display panel in use of the data modulated by the first to third compensation parts.