Display Screen Detection Using Quantified Color Breakup and Hue
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Solution Overview
Problem
Existing display technologies, particularly OLED displays using COE technology, suffer from significant color breakup and reflection hue issues due to ambient light, lacking a quantitative evaluation method for these phenomena, leading to unsatisfactory user experience.
Innovation Solution
A method and device for detecting display screens that quantify color breakup and hue by emitting light, measuring reflected light values, and calculating a color breakup and hue quantization value using specific mathematical formulas to determine screen quality within predetermined ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ambient light is incident to a display screen, then the display screen shows color breakup in reflected light, but no quantitative evaluation method is provided to measure this color breakup
Solution Approach 1:
The patent transforms the qualitative color breakup phenomenon into quantitative measurement by introducing specific parameters: color channel values (a, b), color breakup value (lab), and hue value (ε). These parameters change from abstract visual perception to measurable numerical quantities that can be precisely evaluated and controlled.
Solution Approach 2:
The patent introduces an intermediary detection system consisting of a light source, detector, and processing unit. This intermediary apparatus mediates between the ambient light incident on the display screen and the quantitative evaluation of color breakup, enabling precise measurement without direct human visual inspection.
2Measurement precision
If a light source emits light onto the display screen to form diffuse reflection, then color breakup and hue can be measured, but the detection process becomes more complex
Solution Approach 1:
The detection apparatus is designed with multi-functionality: the light source provides illumination, the detector measures color channel values, and the processing unit performs multiple calculations (color breakup value, hue value, and comprehensive evaluation). This universal system handles multiple measurement tasks within a single integrated apparatus, reducing overall system complexity.
Solution Approach 2:
The patent replaces subjective human visual inspection with an automated optical-electrical measurement system. The detector converts optical information (color breakup and hue) into electrical signals for numerical processing, substituting mechanical/visual evaluation with automated sensing and computation.
3Measurement precision
If the detector rotates around each test point to obtain multiple measurement positions, then measurement accuracy improves, but detection time increases
Solution Approach 1:
The patent implements a balanced measurement approach by selecting specific measurement positions around test points rather than measuring all possible positions. This partial action approach achieves sufficient measurement accuracy for color breakup evaluation without the excessive time consumption of complete 360-degree measurement at every point.
Solution Approach 2:
The patent performs preliminary determination of color breakup value and hue value before conducting the full comprehensive evaluation. This preliminary action allows the system to quickly assess basic color properties and only perform detailed multi-position measurements when necessary, reducing overall detection time while maintaining accuracy.
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
Enables precise control and quantification of color breakup and hue, improving display quality and customer satisfaction by setting and maintaining these parameters within desired limits.
Implementation Method 1
emitting, by a light source, light onto a surface of a display screen to form a diffuse reflection
Data Source
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AI summary
A detection method and a detection device for a display screen are provided. The detection method includes: emitting, by a light source, light onto a surface of a display screen to form a diffuse reflection, where the light source includes an initial first color channel value a1 and an initial second color channel b1; measuring, by a detector, a first color channel value a and a second color channel value b of the reflected light; calculating a color breakup value lab of the reflected light by: lab=a−a12+b−b12; calculating, in response to (a + b) being not equal to 0, a hue value ε by: ε = |a + b| / (a + b); calculating a color breakup and hue quantization value ϕ of the reflected light by: φ=lab×ε=a+ba−a12+b−b12/a+b; and determining whether the display screen is qualified based on determining whether the color breakup and hue quantization value ϕ is within a predetermined quantization value range.