Display Luminance Control Using Illuminance Segmentation
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Solution Overview
Problem
Existing display devices that adjust luminance based on ambient illuminance can cause unexpected changes in the display's appearance when the relationship between illuminance and luminance is altered, leading to user discomfort due to changes in visual recognition and eyestrain.
Innovation Solution
A display device with an illuminance acquisition unit, a relationship acquisition unit, and a controller that maintains two distinct relationships between ambient light illuminance and display luminance, ensuring that the luminance remains within predetermined ranges and minimizes changes in the display's appearance by using different relationships based on illuminance thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the luminance is changed with respect to the previously set relationship between ambient illuminance and display luminance, then the user comfort is improved, but the display appearance changes unexpectedly
Solution Approach 1:
The patent segments the relationship between ambient illuminance and display luminance into multiple distinct ranges (first range and second range). In the first range (lower illuminance), the display luminance is maintained at a minimum value to ensure visibility. In the second range (higher illuminance), the display luminance follows a different relationship to prevent excessive brightness. This segmentation allows independent optimization of display characteristics in different lighting conditions without causing unexpected appearance changes when transitioning between ranges.
2Object-affected harmful factors
If the display luminance is reduced to minimum value in low ambient light, then eyestrain is reduced, but visual recognition becomes difficult
Solution Approach 1:
The patent changes the luminance parameter based on ambient illuminance conditions. In low ambient light conditions (first range), the display luminance is maintained at a minimum value Y1 that ensures adequate visual recognition while still providing comfort. In high ambient light conditions (second range), the display luminance is adjusted to a maximum value Y2 to prevent excessive brightness and eyestrain. This dynamic parameter adjustment optimizes both visual recognition and comfort based on environmental lighting conditions.
Data Source
AI summary
A display device, program, and display method that even if the luminance is changed with respect to the previously set relationship between the ambient illuminance and the luminance of a display, are able to suppress a change in the previous relationship. A display device includes a display, an illuminance acquisition unit configured to acquire an ambient-light illuminance that is an illuminance of ambient light, a relationship acquisition unit configured to acquire a relationship between the ambient-light illuminance and a luminance of the display, a controller configured to control the relationship, and a setting unit configured to set a first set point and a second set point. The first set point is a point specified by a luminance set at an illuminance equal to or greater than a particular illuminance Is and the illuminance.