Backlight Unit Sub-Pixel Segmentation for Color Breakup
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Solution Overview
Problem
Display apparatuses using time division schemes face issues with color breakup and reduced color reproducibility due to the sequential display of red, green, and blue light sources, which affects the perceived full color image.
Innovation Solution
A display apparatus with a backlight unit that includes first, second, and third light sources emitting yellow, red-green, and blue light respectively, and a display panel with color filters and open portions allowing independent operation of sub-pixels to receive these lights during specific sub-fields, enhancing color mixing and reducing color breakup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If red, green, and blue light sources are sequentially displayed using time division scheme, then full color image can be displayed, but color breakup occurs and color reproducibility is reduced
Solution Approach 1:
The display panel is divided into multiple sub-pixels with different color filters (red, green, blue) within the same pixel structure. Each sub-pixel can be independently controlled to receive specific color light sources, allowing precise control over color reproduction while maintaining full color display capability through spatial segmentation of color filtering functions.
Solution Approach 2:
The patent transitions from temporal color separation (sequential display of RGB light sources) to spatial color separation (multiple color filters within the same pixel area). By adding the spatial dimension of color filter distribution within pixels, the system achieves both full color display and improved color reproducibility simultaneously.
2Adaptability or versatility
If multiple color filters are arranged in different spaces (space division scheme), then full color image can be displayed, but device complexity increases
Solution Approach 1:
Multiple color filters (red, green, blue) are merged within the same pixel structure rather than being separated across different pixels. This combining of color filtering functions within individual pixels reduces the overall complexity of the display panel while maintaining full color display capability through the coordinated operation of sub-pixels.
Solution Approach 2:
Each pixel structure serves multiple functions by containing multiple color filters that can be independently activated. The same pixel area can display different colors by selectively controlling which color filters receive light, making the pixel structure multi-functional and reducing the need for separate color filter arrangements across different spatial locations.
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 effectively prevents color breakup and improves color reproducibility by allowing precise control of light sources and sub-pixel operations, resulting in better brightness and color accuracy.
Implementation Method 1
the backlight unit includes a first light source which provides a first color light to the display panel, a second light source which provides a second color light to the display panel, and a third light sources which provides a third color light to the display panel, spectral bands of the first, second and third color light are different from each other
Implementation Method 2
each of the pixels may include a first color filter, a second color filter having a color different from the first color filter, and an open portion defined outside of the first and second color filters
Data Source
AI summary
A display apparatus includes a display panel including a plurality of pixels, and a backlight unit disposed at a rear surface of the display panel and supplying a light to the display panel, where the backlight unit includes a first light source which provides a first color light to the display panel, a second light source which provides a second color light to the display panel, and a third light sources which provides a third color light to the display panel, spectral bands of the first, second and third color light are different from each other, and the first color light and the second color light have substantially the same color as each other.