Optical Compensation Across Transparent and Non-Transparent Display Areas
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Solution Overview
Problem
There are deviations in luminance and color coordinates between different areas of a display device, particularly between transparent and non-transparent areas, leading to reduced display quality.
Innovation Solution
An optical compensation device measures optical information from different areas of a display device, calculates target optical information using offset lookup tables, and determines reference gamma voltages to minimize differences within a reference range, thereby improving display quality through multi-time programming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multi-time programming is performed to compensate optical characteristics of different areas, then display quality is improved, but measurement and compensation complexity increases
Solution Approach 1:
The display device is divided into multiple areas (first area with transparent area and first non-transparent area, second area with transparent area and second non-transparent area) with different optical characteristics. Each area is measured and compensated independently using separate probes and lookup tables, allowing targeted compensation without affecting other areas.
Solution Approach 2:
Different compensation parameters (first lookup table and second lookup table with different offset values) are applied to different areas of the display device based on their specific optical characteristics. The first probe measures and compensures the first area while the second probe measures and compensures the second area, ensuring each region receives appropriate local compensation.
2Manufacturing precision
If offset lookup tables are used to compensate luminance and color coordinate differences between areas, then display uniformity is improved, but calibration time and process complexity increases
Solution Approach 1:
Offset lookup tables are pre-calculated and stored before actual display operation. The first lookup table contains offset values for the first area and the second lookup table contains offset values for the second area, allowing rapid compensation during operation without real-time calculation, thus reducing calibration time while maintaining precision.
Solution Approach 2:
The compensation method uses lookup tables that store pre-determined offset values representing the difference between transparent and non-transparent areas. These tables act as copied compensation data that can be quickly applied without performing complex real-time measurements and calculations.
Data Source
AI summary
An optical compensation device includes a first optical measurer which measures first optical information of a first area of a display device and second optical information of a second area of the display device next to the first area, a target calculator which calculates first target optical information by compensating the second optical information based on an offset lookup table including an offset related to a difference between the first area and the second area, and a gamma determiner which determines a first reference gamma voltage for the first area such that a difference between the first optical information and the first target optical information is within a reference range.