Touch-Responsive Display Luminance Layout for Lower OLED Power
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Solution Overview
Problem
Portable information terminals with organic EL displays face high power consumption due to increased current flow from higher luminance requirements, particularly for blue light, which is more sensitive to brightness in the peripheral visual field, leading to inefficient power usage.
Innovation Solution
A display device with a display region that detects touch and adjusts luminance by dividing it into regions, where the luminance of blue is lower in peripheral areas and higher in central areas, using a combination of light-emitting and reflective elements to enhance visibility while reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the luminance of the display is increased to improve visibility, then the visibility is improved, but the power consumption increases due to increased current flow through EL elements
Solution Approach 1:
The patent applies local quality by differentiating luminance requirements across different visual fields. The central visual field receives higher luminance for detailed viewing, while the peripheral visual field receives lower luminance since it is more sensitive to brightness. This spatial differentiation of luminance quality reduces overall power consumption while maintaining visibility where it matters most.
Solution Approach 2:
The display region is segmented into central and peripheral visual field regions with different luminance characteristics. By dividing the display area and applying different luminance levels to different segments, the patent achieves visibility optimization without uniformly increasing power consumption across the entire display.
2Illumination intensity
If the luminance of blue is increased in peripheral areas to improve visibility, then the visibility is improved, but the power consumption increases significantly since blue EL elements consume more power
Solution Approach 1:
The patent applies local quality by specifically addressing the blue luminance distribution across different visual fields. Since the peripheral visual field is particularly sensitive to blue brightness, the patent maintains adequate blue luminance in peripheral areas only when necessary, while reducing blue luminance in central areas where other colors can compensate, thereby optimizing power consumption for blue EL elements.
3Use of energy by moving object
If the refresh frequency is reduced to lower power consumption, then the power consumption is reduced, but the display quality may be affected
Solution Approach 1:
The patent applies local quality by implementing different refresh frequency strategies for different visual field regions. The central visual field, which requires higher image quality, receives more frequent updates, while the peripheral visual field, being more sensitive to motion and less demanding on image fidelity, can tolerate lower refresh frequencies. This regional differentiation maintains overall display quality while reducing average power consumption.
Data Source
AI summary
A display device with excellent visibility can be provided. The display device includes a display region displayed by a light-emitting element. In the display region, a point touched by a user is a first point, a point which has been touched by the user prior to the first point is a second point, a vector that starts at the first point and ends at the second point is a first vector, a vector obtained by multiplying the first vector by k (k is a real number) is a second vector, and a point that is the second vector away from the first point is a third point, the display region includes a first region and a second region obtained by excluding the first region from the display region, The first region includes a first circle and a second circle, the center of the first circle is the first point, and the center of the second circle is the third point. The luminance in the first region is higher than the luminance in the second region.