Pixel Grid Color Correction for Mixed LED Displays
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Solution Overview
Problem
The replacement of some three-in-one LED elements with inexpensive white-color LED elements in image displays alters the color proportion, leading to hue changes and increased costs without significant reductions in image quality.
Innovation Solution
An image display apparatus with a grid pattern of pixels, where basic grids consist of four pixels, with one or two pixels assigned a three-in-one element for primary colors and the remaining pixels assigned a single-color light-emitting element, utilizing color reproduction range correcting means to adjust light-emission intensity and maintain image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If some three-in-one LED elements are replaced with white-color LED elements to reduce cost, then manufacturing cost decreases, but hue changes occur due to altered color proportions
Solution Approach 1:
The patent adjusts the light emission intensity of white-color LED elements as a variable parameter to control their contribution to the overall color output. By dynamically changing the intensity parameter, the system compensates for the hue shifts caused by replacing three-in-one elements with white-color elements, thereby maintaining color accuracy while reducing manufacturing costs
Solution Approach 2:
The patent implements a feedback mechanism where the light emission intensity of white-color LED elements is adjusted based on the detected or calculated hue of the displayed image. This feedback loop ensures that color proportions are maintained despite the replacement of three-in-one elements with cheaper white-color elements, resolving the contradiction between cost reduction and color accuracy
2Manufacturing precision
If three-in-one LED elements are used to maintain color accuracy, then hue stability is improved, but manufacturing cost increases
Solution Approach 1:
The patent replaces expensive three-in-one LED elements with cheaper white-color LED elements in certain pixel positions (specifically in GRB and RGB patterns). Although white-color elements are less expensive, the system compensates for potential color accuracy issues through controlled intensity adjustment, achieving cost reduction while maintaining acceptable hue stability
Solution Approach 2:
The patent applies different element types in different local regions of the display. Three-in-one elements are used in positions where color accuracy is critical, while white-color elements are used in positions where cost reduction is prioritized. The light emission intensity of each element type is locally adjusted to maintain overall hue stability across the display
3Measurement precision
If pixel density is increased to improve resolution, then image quality improves, but cost and power consumption increase
Solution Approach 1:
The patent divides the display into basic grids of four pixels and applies different element arrangements in different segments. By segmenting the display and using mixed element types (three-in-one and white-color) in specific patterns, the system achieves high resolution through increased pixel density while controlling costs by using cheaper white-color elements in certain segments
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 costs by using single-color elements while minimizing hue changes, ensuring high image quality and resolution through effective color correction and luminance adjustment.
Implementation Method 1
A typical image display apparatus includes a display section formed of a number of display units arranged vertically and horizontally, and each of the display units is provided by arranging, in a grid pattern, pixels each formed of a light-emitting element such as an LED
Implementation Method 2
When LED elements of the three-in-one type are arranged as pixels, one pixel emits light of three primary colors and thus the three colors are easily mixed as compared with a type in which single-color LED elements for R, G, and B are arranged
Data Source
AI summary
An image display apparatus comprising a display section provided by pixels arranged in a grid pattern, each of the pixels being formed of a light-emitting element, in which basic grids are repeatedly arranged in a grid pattern, each of the basic grids consisting of four pixels of a 2 by 2 matrix, each of the basic grids having a pattern in which one or two pixels of the four pixels being assigned a three-in-one element including three primary colors of R, G, and B and the remaining pixels being assigned a single-color light-emitting element, and the apparatus comprises processor for correcting a first color reproduction range provided by chromaticities of the three primary colors of R, G, and B to a second color reproduction range by light-emission intensity of the single-color light-emitting element and shifting chromaticity points for the three colors.