Display Device Gradation Control for Elderly Viewability
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Solution Overview
Problem
Conventional display screens do not adequately enhance viewability for elderly people, as existing techniques fail to effectively improve contrast and luminance distribution for senior users.
Innovation Solution
A display device that adjusts pixel gradation values using specialized gradation change characteristics, dividing the gradation region into low, intermediate, and high regions with specific gradation change rates, ensuring constant rates in low and high regions and varying rates in the intermediate region to enhance contrast and luminance, thereby improving viewability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional display techniques are used, then general viewability is maintained, but viewability for elderly people is insufficient
Solution Approach 1:
The patent applies local quality by implementing different gradation change rates for different gradation regions. Specifically, the low gradation region and high gradation region use one gradation change rate, while the intermediate gradation region uses a different gradation change rate. This localized differentiation optimizes contrast and luminance distribution specifically for elderly users without affecting other display characteristics.
Solution Approach 2:
The patent changes the gradation parameter by introducing specialized gradation change characteristics that differ from conventional linear or uniform gradation. The system adjusts the output gradation values based on input gradation values using region-specific change rates, transforming the display output to enhance viewability for elderly people with declining visual acuity.
2Ease of operation
If uniform gradation adjustment is applied, then processing simplicity is maintained, but contrast enhancement for elderly users is insufficient
Solution Approach 1:
The patent segments the gradation region into three distinct parts: low gradation region, intermediate gradation region, and high gradation region. Each segment is processed with its own gradation change rate, allowing targeted contrast enhancement where needed while maintaining simplicity in other regions. This segmentation enables differential processing without requiring complete system redesign.
3Ease of operation
If specialized gradation characteristics are implemented, then viewability for elderly people is improved, but processing complexity increases
Solution Approach 1:
The patent implements local quality by applying specialized gradation processing only to specific regions (low and high gradation regions) with a first gradation change rate, while the intermediate region uses a second gradation change rate. This localized approach enhances viewability for elderly users without requiring complex processing across the entire gradation range, thereby limiting the increase in processing complexity.
Data Source
AI summary
A smartphone in accordance with an embodiment of the present invention includes a control section capable of generating an output image by adjusting a gradation value of each pixel of an input image with use of specialized gradation change characteristics. In the specialized gradation change characteristics, (i) a gradation change rate is substantially constant in a low gradation region and a high gradation region, (ii) in a first side of an intermediate gradation region selected from (a) a low-gradation-region side and (b) a high-gradation-region side, the gradation change rate is lower than in the low gradation region and lower than in the high gradation region, and (iii) in a second side of the intermediate gradation region selected from (a) the low-gradation-region side and (b) the high-gradation-region side, the second side differing from the first side, the gradation change rate is higher than in the low gradation region and higher than in the high gradation region.