Microprocessor Illumination Control for Display Contrast
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Solution Overview
Problem
Existing display technologies face challenges in enhancing image contrast without increasing cost and complexity, and often result in image distortion.
Innovation Solution
An apparatus comprising a light source, image data buffer, and micro-processor that adjusts illumination levels based on predefined thresholds, switching between eco, normal, and boost modes to optimize contrast without additional optical units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If optical materials and modules are added to match polarity of output lights, then brightness adjustment and contrast enhancement are achieved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent extracts the contrast enhancement function from complex optical modules and implements it through simple electronic control of the light source intensity. Instead of adding optical materials and modules to match polarity, the invention controls the light source to output different intensities based on image brightness requirements, achieving contrast enhancement without increasing optical system complexity
Solution Approach 2:
The patent replaces the mechanical/optical approach (using optical materials and modules) with an electronic control approach. The microprocessor controls the light source intensity electronically based on image brightness data, substituting complex optical mechanisms with simple electronic intensity modulation
2Illumination intensity
If signal processing is applied to brightness values, then contrast enhancement is achieved, but original image information is distorted
Solution Approach 1:
The patent segments the image into different brightness regions (dark regions below threshold and bright regions above threshold) and applies different light source intensities to display these regions. This segmentation approach enhances contrast by clearly distinguishing dark and bright areas while preserving the original image information through threshold-based classification rather than complex signal processing
Solution Approach 2:
The patent changes the physical parameter of light source intensity based on image brightness thresholds. By adjusting the light source output intensity to match the brightness characteristics of the image content, the system enhances contrast while maintaining fidelity to the original image information
3Illumination intensity
If ultrasonic motor or optical shutter is added, then brightness and contrast control is achieved, but cost and device complexity increase
Solution Approach 1:
The light source serves multiple functions: it provides both the illumination needed for image display and the contrast enhancement function through intelligent intensity control. The microprocessor enables the light source to self-adjust its intensity based on image brightness requirements, eliminating the need for separate ultrasonic motors or optical shutters
Data Source
AI summary
An apparatus for enhancing image contrast includes a micro-processor which presets a plurality of thresholds, such as a black threshold and a white threshold. When determining the brightness of an image is lower than the black threshold, the micro-processor decreases the illumination level of a light source. When determining the brightness of an image is higher than the white threshold, the micro-processor increases the illumination level of the light source. A method for enhancing image contrast includes the steps of receiving an image data; determining whether the brightness of an image is lower than the black threshold; if yes, decreasing the illumination level of the light source; determining whether the brightness of the image is higher than the white threshold; and if yes, increasing the illumination level of the light source.