Display Apparatus Brightness Index for Contrast
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Solution Overview
Problem
Existing display apparatuses suffer from relatively low contrast due to limitations in grayscale and contrast capabilities of spatial light modulators, which fall short of the dynamic range perceivable by the human eye.
Innovation Solution
An image processing and display method that acquires brightness data, converts it into N-bit grayscale data, and adjusts illumination based on a brightness increase index, allowing for increased dynamic range and contrast by modulating illumination light according to preset brightness extremes, thereby enhancing the representation of darkness details and overall image delicateness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional grayscale data storage and illumination control methods are used, then device complexity is low, but contrast and dynamic range are insufficient
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing a brightness increase index map before image display. This index map pre-identifies regions where brightness enhancement is needed, allowing the system to quickly retrieve and apply appropriate brightness compensation during display without complex real-time calculations, thus improving contrast while controlling processing complexity
Solution Approach 2:
The patent changes the parameter representation from conventional grayscale values to a combination of N-bit grayscale data and brightness increase index. This parameter transformation enables the system to encode both the base brightness level and the enhancement requirement, allowing for expanded dynamic range and improved contrast through selective brightness adjustment in different image regions
2Reliability
If N-bit grayscale data with brightness increase index is used, then dynamic range is increased, but data storage requirements increase
Solution Approach 1:
The patent segments the brightness information into two separate components: N-bit grayscale data for base brightness representation and a brightness increase index for enhancement control. This segmentation allows the system to store brightness information more efficiently by separating the essential display data from the enhancement metadata, reducing overall storage requirements while maintaining expanded dynamic range capability
Solution Approach 2:
The patent uses a compact brightness increase index that can be generated on-demand and discarded after use, rather than storing extensive high-precision brightness data. This approach replaces permanent storage of large data structures with temporary, computationally-generated enhancement parameters, significantly reducing storage requirements while achieving the same dynamic range expansion effect
3Manufacturing precision
If brightness data is accurately converted to N-bit grayscale data, then manufacturing precision of image output is improved, but measurement precision requirements increase
Solution Approach 1:
The patent introduces a brightness increase index as an intermediary element between the original brightness data and the final N-bit grayscale output. This intermediary carries enhancement information that guides the conversion process, allowing the system to achieve high manufacturing precision in image output by using the index to compensate for quantization losses during the N-bit conversion process
Solution Approach 2:
The patent transforms the brightness measurement approach by converting continuous brightness data into discrete N-bit grayscale levels augmented with a brightness increase index. This parameter change enables the system to maintain manufacturing precision by using the index to recover fine brightness distinctions that would otherwise be lost in the quantization process, reducing the need for extremely high measurement precision in the original data
4Reliability
If illumination light is adjusted based on brightness increase index, then contrast is enhanced, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-generating the brightness increase index map that identifies all regions requiring illumination enhancement. This allows the illumination control system to simply retrieve and apply pre-computed enhancement values rather than performing complex real-time analysis, significantly reducing illumination control complexity while maintaining enhanced contrast performance
Solution Approach 2:
The brightness increase index map serves as a self-service guide for the illumination control system. The index contains all necessary information for brightness adjustment, enabling the illumination system to autonomously apply enhancements without requiring complex external control logic or real-time scene analysis, thereby reducing overall device complexity while achieving contrast enhancement
Data Source
AI summary
The present disclosure relates to an image processing apparatus, a display apparatus, and an image processing and display apparatus and method. The image processing and display apparatus includes a data acquisition module, a data conversion and storage module, a data analysis module, a light-emitting module, and an image modulation module. The data conversion and storage module stores brightness data of a color of each pixel of an image as N-bit grayscale data based on data of a highest brightness of the color of the image and stores a brightness increase index of the color of the image. The light-emitting module adjusts emitted illumination light of the color based on the brightness increase index, so that the image modulation module modulates the illumination light of the color based on the N-bit grayscale data to modulate a displayed image.