Segmented Backlight Blending Display Modes
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Solution Overview
Problem
Display systems, such as LCDs, face inefficiencies in light utilization due to narrow band color filters and illumination barriers, resulting in low light emission and limited color saturation, with existing backlight technologies failing to optimize dynamic range and color purity effectively.
Innovation Solution
The implementation of a multi-primary display system with a segmented backlight that uses independently addressable light emitters to adjust color temperature and luminance, allowing for dynamic control of light emission based on image content, and the use of virtual primaries to optimize color gamut and reduce flicker.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If narrow band color filters are used to produce colors in the image, then color saturation is improved, but light utilization efficiency deteriorates
Solution Approach 1:
The backlight is divided into multiple independently controllable light emitting regions, each emitting different wavelengths. This segmentation allows selective illumination of different spectral regions, reducing the need for broad-spectrum filters and improving both color saturation and light efficiency
Solution Approach 2:
Different regions of the display are illuminated with locally optimized spectral characteristics. The system adjusts the spectral composition and intensity of light emitted from different backlight regions to match the specific color requirements of displayed content, improving color saturation where needed while maintaining high light efficiency elsewhere
2Ease of manufacture
If conventional backlight structures are used, then device simplicity is maintained, but light emission efficiency and color purity deteriorate
Solution Approach 1:
The backlight is divided into multiple independently controllable light emitting regions, each emitting different wavelengths. This segmentation allows selective illumination of different spectral regions, reducing the need for broad-spectrum filters and improving both color saturation and light efficiency
Solution Approach 2:
The system dynamically adjusts spectral parameters by selectively activating different wavelength-emitting regions in the segmented backlight. This allows real-time optimization of light emission efficiency and color purity without requiring complex mechanical or chemical changes to the display structure
3Ease of manufacture
If conventional backlight structures are used, then device simplicity is maintained, but color purity and dynamic range deteriorate
Solution Approach 1:
The backlight is divided into multiple independently controllable light emitting regions, each emitting different wavelengths. This segmentation allows selective illumination of different spectral regions, reducing the need for broad-spectrum filters and improving both color saturation and light efficiency
Solution Approach 2:
Different regions of the display are illuminated with locally optimized spectral characteristics. The system adjusts the spectral composition and intensity of light emitted from different backlight regions to match the specific color requirements of displayed content, improving color saturation where needed while maintaining high light efficiency elsewhere
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 significantly enhances light utilization, increases color purity and dynamic range, and reduces flicker, leading to improved image quality and efficiency in display systems.
Implementation Method 1
Arrays of light emitting diodes (LEDs) are used as light emitting sources in backlit display systems
Implementation Method 2
The light emitters may have different wavelengths and may be independently controlled
Implementation Method 3
A backlit liquid crystal display (LCD) device is an example of such a display system. The optical energy emitted by the light emitting source is the active source of light that creates the displayed image seen by a user viewing an image on the display panel of an LCD
Implementation Method 4
A backlit liquid crystal display (LCD) device is an example of such a display system
Implementation Method 5
In display systems that utilize color filters to produce the colors in an image, the typically relatively narrow band color filters subtract optical energy from the light emitted by the display system's light emitting source to create the appearance of colors
Data Source
AI summary
A method of blending image data that includes displaying a first portion of an image from a first set of pixels according to a first mode in which color values of sub-pixels of the first set of the pixels are determined according to time-averaged colors of the corresponding backlight emitters. The method also includes displaying a second portion of the image from a second set of the pixels according to a second mode in which color values of sub-pixels of a second set of the pixels are determined independently for each of the colors of the corresponding backlight emitters. At an interface between the first portion and the second portion, the first portion and the second portion are generally linearly blended so as to form a blended portion of the image, and the blended portion is displayed.