Gamma Adjustment Image Display for Video Signal Input Output Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional projectors limit users' ability to perform detailed and free gamma adjustments, as they can only adjust optical output levels at pre-defined input signal levels, restricting adjustments to luminance (Y) and not allowing independent adjustments for R, G, and B colors.
Innovation Solution
An image display apparatus and method that includes a picture display unit, a gamma adjustment image display unit showing input/output characteristics, an adjustment operation unit for selecting and changing both input and output levels, and an input/output characteristics setting unit, enabling users to adjust gamma settings freely and in detail for Y, R, G, and B.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If gamma adjustment is limited to pre-defined input signal levels, then the adjustment function is simple to implement, but the user cannot perform detailed and free adjustments
Solution Approach 1:
The patent implements dynamic gamma adjustment by allowing users to select any input signal level and adjust output levels freely, rather than being restricted to fixed pre-defined levels. The adjustment operation unit enables real-time modification of input/output characteristics at any point on the curve, making the system adaptable to user preferences while maintaining ease of operation through intuitive point selection and level adjustment controls.
2Device complexity
If gamma adjustment is limited to luminance (Y) only, then the adjustment function is simple, but color adjustments for R, G, and B cannot be performed
Solution Approach 1:
The patent segments the gamma adjustment function into separate controllable parameters for different color components. The adjustment operation unit allows independent adjustment of input/output characteristics for luminance (Y) and color components (R, G, B), enabling users to modify each channel separately. This segmentation maintains relative simplicity while significantly enhancing versatility by allowing detailed color-specific adjustments.
3Ease of manufacture
If only pre-defined input signal levels are available for adjustment, then the system is easy to implement, but detailed adjustment at user-preferred levels is impossible
Solution Approach 1:
The patent enables parameter changes by allowing users to specify custom input signal levels and adjust output levels at any point on the input/output characteristics curve. The input/output characteristics setting unit stores these customized parameters, enabling precise adjustment at user-preferred levels rather than being limited to fixed pre-defined levels. This maintains ease of implementation while achieving high measurement precision through flexible parameter modification.
Data Source
AI summary
An image display apparatus of the present invention includes: a picture display unit that forms and displays an optical image based on a video signal; a gamma adjustment image display unit that displays a gamma adjustment image containing input/output characteristics of a signal level of the video signal in the displayed optical image; an adjustment operation unit that changes the displayed input/output characteristics on the image; and an input/output characteristics setting unit that sets input/output characteristics of the signal level of the video signal in accordance with the input/output characteristics changed on the image. The adjustment operation unit includes a point selecting part that selects an adjustment point desired to be changed in the input/output characteristics displayed in the image and a level changing part that is capable of changing both of an input level and an output level of the selected adjustment point. Because both of an input signal level and an optical output level can be adjusted, a user can make gamma adjustment easily, freely, and in detail.