Display Inspection Gamma Compensation for Peripheral Luminance
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Solution Overview
Problem
Existing electronic devices face challenges in maintaining consistent display quality, particularly in the peripheral areas adjacent to electronic modules, due to differences in pixel density and luminance, which can lead to inaccuracies in inspection processes.
Innovation Solution
An inspection device is employed to determine and adjust driving voltages based on luminance signals, using lookup tables and compensation units to generate a final gamma lookup table that compensates for errors, ensuring accurate display quality by adjusting pixel luminance and density differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If pixel density is increased in peripheral areas to improve display quality, then luminance consistency is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies local quality by implementing different pixel densities in different regions of the display panel. Specifically, the peripheral area surrounding the electronic module has a higher pixel density than the general area, allowing each region to have optimized display quality appropriate to its location and function.
Solution Approach 2:
The patent changes the pixel density parameter spatially across the display panel. By varying the pixel density from the general area to the peripheral area, the system achieves consistent luminance display quality while adapting to the different requirements of various display regions.
2Manufacturing precision
If gamma voltage adjustment is applied to compensate luminance differences, then display quality is improved, but device complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-calculating and storing gamma voltage compensation values in lookup tables during the manufacturing process. The gamma voltage determination unit retrieves and applies these pre-computed values to compensate for luminance differences in peripheral areas, avoiding the need for complex real-time calculations.
Solution Approach 2:
The patent introduces an intermediary mechanism (gamma voltage determination unit with lookup tables) that mediates between the display controller and the pixel elements. This intermediary translates luminance requirements into appropriate voltage levels, simplifying the overall control architecture while achieving precise luminance consistency.
3Measurement precision
If offset compensation is implemented to correct gamma lookup table errors, then inspection accuracy is improved, but processing complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-determining offset compensation values during the manufacturing and calibration process. These compensation values are stored in advance and applied during inspection and operation, eliminating the need for complex real-time error correction calculations and improving both accuracy and efficiency.
Data Source
AI summary
An inspection device includes a driving voltage determination unit that determines a voltage level of a driving voltage based on a luminance signal corresponding to an image displayed on an electronic device, a driving voltage offset lookup table that stores an offset voltage for the driving voltage, a gamma voltage determination unit that adjusts the voltage level of the driving voltage based on the offset voltage and determines gamma voltages based on the luminance signal and an adjusted driving voltage adjusted from the driving voltage to generate a gamma lookup table, an offset compensation lookup table that stores an offset compensation value, and an offset compensation unit that outputs a final gamma lookup table which compensates for an error of the gamma lookup table based on the offset compensation value.