Color Field Sequential Display Frame Buffer Extraction
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Solution Overview
Problem
Conventional color field sequential display devices require frame storage for packed red, green, and blue data, which increases cost and complexity due to the need to store data for color channels not currently being displayed, leading to inter-frame noise interference that degrades image quality.
Innovation Solution
A method that reads pixel data from an input frame buffer organized as packed color channels, extracts color channel information, generates frame buffer write data, and stores it as color sub-frame information in a target frame buffer, allowing for compensation of new pixel values to reduce inter-frame noise and eliminate chromatic fringing associated with conventional RGB display technology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frame storage is implemented in CFS display devices to store packed red, green, and blue data, then complete color frames can be displayed, but device cost and complexity increase
Solution Approach 1:
The patent extracts only the currently displayed color channel data from the packed RGB frame buffer and stores it in the target frame buffer. Instead of storing all three color channels (red, green, blue) simultaneously, the system extracts and stores only the active color channel data, eliminating the need for complete frame storage while maintaining display functionality.
Solution Approach 2:
The patent segments the packed RGB frame buffer into separate color channel components. The input frame buffer containing packed red, green, and blue data is divided and processed channel-by-channel, with only the currently displayed channel being extracted and stored in the target frame buffer. This segmentation allows selective storage without requiring complete frame storage capacity.
2Manufacturing precision
If packed pixel data is used for conventional LCD refresh, then proper color display is achieved, but inter-frame noise interference occurs in CFS displays
Solution Approach 1:
The patent extracts only the currently displayed color channel from the packed pixel data and processes it separately in the target frame buffer. By extracting and processing each color channel independently rather than handling packed RGB data as a unit, the system avoids inter-frame noise interference while maintaining color accuracy through proper temporal integration.
3Reliability
If complete frames of data are stored in CFS display devices, then all color channels are available for subsequent display, but cost and complexity increase
Solution Approach 1:
The patent extracts only the currently displayed color channel data from the input frame buffer and stores it in the target frame buffer. This selective extraction eliminates the need to store complete frames of all color channels, reducing storage requirements and device complexity while ensuring data availability for the currently displayed channel.
Solution Approach 2:
The patent discards the need to store complete frames of all color channels simultaneously. Instead, only the currently displayed color channel data is retained in the target frame buffer, and previous channel data is discarded. This approach reduces storage complexity while maintaining data availability for continuous display operation.
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 inter-frame noise and eliminates chromatic fringing, improving image quality by compensating for differences in pixel values and eliminating the need for frame storage in color field sequential display devices.
Implementation Method 1
a backlight configured to cycle through a sequence of primary colors, such as red, green and blue, corresponding to the color channels within each pixel
Implementation Method 2
the gray scale pixels are configured to emit an intensity of light for the corresponding color
Implementation Method 3
The backlight colors for each pixel are combined into a single perceived color via temporal integration, a fundamental characteristic of human visual perception
Data Source
AI summary
One embodiment of the present invention sets forth a technique for generating and transmitting video frame data from a graphics processing unit (GPU) to a color field sequential display device. A frame buffer image comprising per-pixel packed color channels is transformed to a frame buffer image comprising regions corresponding to the color channels with vertical blanking regions inserted between color sub-field regions. Each region of the transformed frame buffer image is sequentially transmitted to the color field sequential display device for display of the corresponding color channel. Backlight illumination for each color channel is controlled by the GPU for temporal alignment with display of each color channel during a vertical blanking interval. The GPU may compensate an individual pixel's color channel value based on a corresponding previous color channel value in order to minimize crosstalk between neighboring color fields.