Backlight Unit LED Array Color Vision Deficiency Compensation
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Solution Overview
Problem
Existing display technologies, including liquid crystal display devices, fail to adequately compensate for color vision deficiency, leading to difficulties in distinguishing between certain colors, and current solutions such as colorblind glasses are cumbersome and provide unnatural color perception.
Innovation Solution
A backlight unit for liquid crystal display devices comprising an array of LEDs of at least three different colors, arranged in groups to allow selective control of brightness, synchronized with a control circuit and controller to adjust LED brightness based on the spectral response of a user's cone cells, thereby compensating for color vision deficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If colorblind sunglasses are used to compensate for color vision deficiency, then color differentiation is improved, but device complexity and ease of operation deteriorate
Solution Approach 1:
The patent creates a virtual copy of the colorblind glasses effect through software processing. Instead of physical glasses that filter light, the system processes images through algorithms that simulate the spectral filtering effect, applying custom color transformation matrices that replicate the optical filtering behavior without requiring physical optical components.
Solution Approach 2:
The patent replaces the mechanical/optical system of physical colorblind glasses with an electronic/image processing system. The physical light filtering mechanism is substituted with digital image processing algorithms that transform color information in the captured image data, eliminating the need for users to wear external optical devices.
2Measurement precision
If colorblind sunglasses are used to compensate for color vision deficiency, then color differentiation is improved, but ease of operation deteriorates
Solution Approach 1:
The system automatically detects the user's color vision deficiency type and configures the appropriate color transformation parameters without requiring manual intervention. The processing unit self-adjusts the color mapping based on the identified deficiency pattern, eliminating the need for users to manually configure settings or switch between different correction modes.
Solution Approach 2:
The patent pre-calculates and stores multiple color transformation matrices corresponding to different types of color vision deficiencies. When a user's deficiency type is identified, the system immediately applies the pre-prepared transformation without requiring real-time computation or user configuration, providing instant correction similar to putting on glasses.
3Measurement precision
If display equipment adjusts colors to compensate for color vision deficiency, then color differentiation is improved, but manufacturing precision deteriorates
Solution Approach 1:
The patent applies different color transformation parameters to different regions of the image spectrum. Instead of uniformly adjusting all colors, the system selectively modifies specific wavelength ranges based on the user's color vision deficiency pattern, preserving accurate color representation in regions where the user has normal perception while enhancing differentiation in problematic regions.
Solution Approach 2:
The system dynamically changes color parameters (brightness, saturation, hue) based on the identified color vision deficiency type. The processing unit adjusts the color transformation matrix parameters to optimize differentiation for the specific deficiency pattern, allowing flexible adaptation without requiring physical recalibration or manufacturing adjustments.
4Device complexity
If existing display techniques are used, then device complexity is low, but color differentiation for color vision deficient users deteriorates
Solution Approach 1:
The patent implements a universal color correction system that can handle multiple types of color vision deficiencies (protanopia, deuteranopia, tritanopia) through a single processing framework. The same image processing unit and transformation algorithms serve all deficiency types by selecting appropriate pre-configured parameter sets, eliminating the need for separate hardware systems for each deficiency type.
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
The solution enables improved color perception and differentiation for users with color vision deficiency, providing a comfortable and natural viewing experience while being easy to implement and having low power requirements.
Implementation Method 1
an array of light-emitting diodes (LEDs) of at least three different colours
Implementation Method 2
a control circuit that is to be employed to control individual LEDs in said array; and a controller configured to drive the control circuit to selectively decrease a brightness of LEDs of at least one of the at least three different colours
Data Source
AI summary
Disclosed is a backlight unit of a liquid crystal display device, the backlight unit having an array of light-emitting diodes (LEDs) of at least three different colours, wherein the LEDs are arranged as groups of LEDs within the array, each group including at least one LED of each of the at least three different colours; a control circuit that is to be employed to control individual LEDs in the array; and a controller configured to drive the control circuit to selectively decrease a brightness of LEDs of at least one of the at least three different colours in at least a part of the array.