Optical Compensation for Display Transmission-Area Luminance Matching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a deviation in luminance between the intended and actual image displayed by display devices, particularly between transmission and non-transmission areas, which affects display quality.
Innovation Solution
An optical compensation device measures transmission and neighboring luminances to determine reference gamma voltages, synchronizing light source emission with pixel driving signals to adjust data voltages for accurate luminance compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multi-time programming is performed to compensate luminance deviation in transmission area, then display quality is improved, but manufacturing complexity and time increase
Solution Approach 1:
The patent applies preliminary action by measuring and determining reference gamma voltages for the transmission area during the manufacturing process before the display device is shipped. The optical compensation device measures transmission luminance and neighboring luminance, then determines appropriate gamma voltages in advance, so that luminance uniformity is pre-optimized without requiring complex real-time compensation during operation.
Solution Approach 2:
The patent implements self-service by enabling the display device to perform self-diagnosis and self-compensation through integrated optical sensors. The device automatically measures its own luminance characteristics using embedded sensors and adjusts gamma voltages without external intervention, reducing the need for complex external compensation equipment and manual calibration processes.
2Measurement precision
If light source emission is synchronized with pixel driving signals, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent applies periodic action by synchronizing the light source emission with the pixel driving signals at specific periods. The optical sensor measures transmission luminance during defined time windows when pixels are actively emitting light, ensuring measurements are taken at optimal moments. This periodic synchronization improves measurement accuracy without requiring continuous complex control, as measurements are performed at regular, predictable intervals aligned with the display refresh cycle.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces contrast between transmission and non-transmission areas, improving display quality by ensuring luminance differences are within a reference range.
Implementation Method 1
an optical sensor overlapping the transmission area and including a light source
Implementation Method 2
a light source of an optical sensor, which overlaps the transmission area
Data Source
AI summary
An optical compensation device includes an optical measurer which measures a first transmission luminance of a transmission area of a display device when a light source of an optical sensor, which overlaps the transmission area, does not emit light, a second transmission luminance of the transmission area when the light source emits light, and a neighboring (adjacent) luminance of a neighboring (adjacent) area neighboring the transmission area, and a gamma determiner which determines a first transmission reference gamma voltage for the transmission area so that a difference between the first transmission luminance and the neighboring (adjacent) luminance is within a reference range, and determines a second transmission reference gamma voltage for the transmission area so that a difference between the second transmission luminance and the neighboring (adjacent) luminance is within the reference range.