Projector Luminance Correction via Pattern Display
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Solution Overview
Problem
Existing image display apparatuses face challenges in providing a cost-effective method for users to visually grasp and correct luminance unevenness, as they require imaging devices, increasing costs and complexity.
Innovation Solution
An image display apparatus with an OSD display section showing pattern images for luminance adjustment, allowing users to select and adjust areas for luminance correction without a camera, using a light modulator to project images with adjustable grayscale, enabling users to correct luminance unevenness while visually monitoring the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an imaging device is used to perform luminance unevenness correction, then the correction capability is provided, but the cost increases
Solution Approach 1:
The patent extracts and removes the imaging device from the luminance correction system. Instead of using a camera to capture and analyze the projected image for correction, the system uses the projector itself to display test patterns and allows users to visually assess and correct luminance unevenness directly on the projection surface, eliminating the need for separate imaging hardware
Solution Approach 2:
The system enables users to perform self-service luminance correction by displaying test patterns and allowing direct visual assessment on the projection surface. Users can adjust luminance parameters based on their own visual observation of the projected image, making the correction process independent of external imaging devices
2Reliability
If an imaging device is used to perform luminance unevenness correction, then the correction capability is provided, but the device complexity increases
Solution Approach 1:
The imaging device is completely removed from the system architecture. The correction functionality is achieved through software-based test pattern display and user interface controls, eliminating the hardware complexity associated with cameras, image processing units, and automated analysis algorithms
Solution Approach 2:
The projector displays both test patterns for correction and regular content images using the same projection hardware. The control interface serves dual purposes by allowing both luminance correction adjustments and normal operation controls, reducing the need for separate dedicated components
3Ease of operation
If pattern images are displayed for luminance adjustment, then visual feedback is provided, but the ease of operation improves
Solution Approach 1:
The test patterns are designed with specific local characteristics - displaying luminance gradients and contrast variations in different regions of the projection surface. This allows users to visually identify luminance unevenness in specific areas and make targeted corrections, providing localized visual feedback without overwhelming the user with global image information
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
Enables users to adjust image luminance based on selected pattern images, reducing costs by eliminating the need for imaging devices and allowing for visual feedback during correction, while performing fine-grained adjustments for each color component.
Implementation Method 1
displays an image modulated by a light modulator on an image display surface
Data Source
AI summary
An image display apparatus capable of providing a luminance unevenness correction capability that allows a user to readily visually grasp the correction is provided. An image display apparatus that includes an OSD display section that displays pattern images showing areas for luminance adjustment in an image, a pattern image selection operation section that accepts selection of any of the displayed pattern images, a luminance adjustment operation section that accepts operation of adjusting the luminance of the image, and a luminance correction section that adjusts the luminance of the image in the area for luminance adjustment corresponding to the selected pattern image.