Methods to compensate manufacturing variations and design imperfections in a display device
Inventors
Wang, Kang-Huai • Wilson, Gordon C.
Assignees
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Publication Number
US-11019318-B2
Publication Date
2021-05-25
Expiration Date
Abstract
A display device includes (a) a non-volatile memory containing corrective data for compensating input image data received; (b) display hardware receiving control and data signals for displaying an image; and (c) an image processing circuit that retrieves the corrective data from the non-volatile memory to generate the data signals for the display hardware, after applying the corrective data to each color component of each pixel in the input image data.
Core Innovation
A display system displays input image data received for an image using display hardware comprising a plurality of display pixels. The display hardware includes a thermometer that measures an operating temperature at the plurality of display pixels, and a non-volatile memory stores corrective data derived for the display hardware.
The corrective data compensate manufacturing variations between the plurality of display pixels. The corrective data are derived based on differences between detected intensities of each color component for standardized color patterns input in the plurality of display pixels and corresponding expected values of each color component for the standardized color patterns input in the plurality of display pixels respectively.
An image processing circuit applies the corrective data to the input image data based on the measured operating temperature at the plurality of display pixels to generate corrected data signals for displaying the image. The corrective data may be represented as table format corrective data or as corrective data that are applied in a digital domain or an analog domain.
Claims Coverage
The document provides two independent claims that cover a temperature-aware display system using non-volatile corrective data derived from per-color-component intensity differences for standardized color patterns. Each independent claim includes corrective-data derivation from detected and expected values, storage in non-volatile memory, and application of the corrective data to input image data to generate corrected data signals, with one independent claim additionally requiring operating-temperature measurement using a thermometer.
Temperature-measured display compensation with non-volatile corrective data
A display system for displaying input image data comprising display hardware with a plurality of display pixels and a thermometer that measures an operating temperature, non-volatile memory storing corrective data derived for compensating manufacturing variations between the pixels using differences between detected intensities of each color component for standardized color patterns and corresponding expected values, and an image processing circuit applying the corrective data to the input image data based on the measured operating temperature to generate corrected data signals for displaying the image.
Non-volatile corrective data derivation and application for standardized color patterns
A display system for displaying input image data comprising display hardware with a plurality of display pixels, non-volatile memory storing corrective data derived for compensating manufacturing variations between the pixels using differences between detected intensities of each color component for standardized color patterns and corresponding expected values, and an image processing circuit applying the corrective data to the input image data to generate corrected data signals for displaying the image.
Across both independent claims, the core inventive coverage is a display system that uses corrective data stored in non-volatile memory. The corrective data are derived from differences between detected and expected intensities of each color component for standardized color patterns to compensate manufacturing variations across display pixels, and are applied by an image processing circuit to generate corrected data signals for the displayed image. One independent claim further conditions the application of corrective data on operating temperature measured by a thermometer.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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