Luminance Compensation for Micro-LED Display Uniformity
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Solution Overview
Problem
Micro-LED arrays used in liquid crystal display devices face issues with uneven light-emitting luminance due to manufacturing limitations, affecting display quality.
Innovation Solution
A luminance compensating method that sets identical luminance values for backlight units and gray level data for pixel units, measures light-emitting luminance, determines a compensation-coefficient matrix, and adjusts backlight and pixel unit luminance to achieve uniformity by multiplying driving currents and gray level data with corresponding compensation coefficients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If micro-LED arrays are used in backlight modules, then light-emitting luminance and luminous efficiency are improved, but uneven light-emitting luminance occurs due to manufacturing limitations
Solution Approach 1:
The patent applies local quality by dividing the backlight module into multiple independent backlight units, each with independently controllable luminance. This allows different luminance compensation to be applied to different regions of the display panel, addressing the uneven luminance caused by manufacturing variations in micro-LED arrays.
Solution Approach 2:
The patent changes the luminance parameter of each backlight unit individually through independent gray level control. By adjusting the gray level data for each backlight unit based on measured luminance values, the system compensates for manufacturing imperfections and achieves uniform overall luminance across the display panel.
2Manufacturing precision
If luminance compensation is implemented by adjusting each backlight unit individually, then uniformity of light-emitting luminance is improved, but device complexity increases
Solution Approach 1:
The patent segments the backlight module into multiple independent backlight units that can be controlled separately. This segmentation enables targeted luminance compensation for each region, improving overall uniformity while keeping each control unit relatively simple and modular.
Solution Approach 2:
The patent implements a feedback mechanism where the luminance values of each backlight unit are measured and used to determine compensation coefficients. These coefficients are then applied to adjust the gray level data for subsequent display, creating a closed-loop system that automatically compensates for luminance non-uniformity without requiring complex manual calibration.
Data Source
AI summary
A luminance compensating method of a display device, a luminance compensating device, a display device and a storage medium. The display device includes a backlight module and a display panel, the display panel includes a plurality of portions, the backlight module includes a plurality of backlight units, and the plurality of backlight units respectively correspond to the plurality of portions. The method includes: setting luminance values of the plurality of backlight units of the backlight module to an identical set luminance value, and setting gray level data of a plurality of pixel units of the display panel to an identical set gray level value; measuring light-emitting luminance values of the plurality of portions of the display panel to obtain a first luminance matrix of the display panel, in a case where the plurality of backlight units emit light; determining a compensation-coefficient matrix based on the first luminance matrix.