Anti-Reflection Layers for Display Power Reduction
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Solution Overview
Problem
Current display devices in electronic devices, such as smartphones, suffer from high current consumption due to the low transmissivity of polarizing films, which block more than half of the display's brightness, leading to increased power consumption and reduced outdoor visibility.
Innovation Solution
Incorporating one or more anti-reflection layers in the display device, specifically on the transparent member and the display panel, to enhance light transmission and reduce current consumption, while maintaining or improving brightness and visibility outdoors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a polarizing film is mounted in the display, then the display can operate as a touch screen with polarized light control, but more than half of the display brightness is blocked and current consumption increases
Solution Approach 1:
An anti-reflection layer is introduced as an intermediary component between the polarizing film and the external environment. This layer reduces light reflection at interfaces, allowing more light to pass through the polarizing film effectively, thereby reducing the need to increase backlight brightness and lowering current consumption while maintaining touch screen functionality
Solution Approach 2:
The optical parameters of the display system are changed by adding the anti-reflection layer, which modifies the reflection and transmission characteristics of light at different interfaces. This parameter change improves overall light transmission efficiency, reducing energy loss and current consumption while preserving the polarizing film's touch control capabilities
2Reliability
If a polarizing film with transmissivity of 43-44% is used, then the display can function properly, but brightness is reduced and visibility outdoors deteriorates
Solution Approach 1:
The anti-reflection layer serves as an intermediary that reduces light loss at optical interfaces. By minimizing reflection, it increases the overall light transmission through the display stack, enhancing brightness and outdoor visibility without compromising the polarizing film's functional reliability
Solution Approach 2:
The patent converts the harmful effect of light reflection (which causes brightness loss) into a benefit by using the anti-reflection layer to systematically manage and reduce reflections at multiple interfaces. This transforms what would be wasted light into useful transmitted light, improving brightness while maintaining display function
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
The anti-reflection layers increase light transmission by 3-5% compared to traditional designs, reducing display panel current consumption and enhancing outdoor visibility and color, material, and finishing (CMF) effects.
Implementation Method 1
a first anti-reflection layer which is coupled to the upper surface of the transparent member... and a second anti-reflection layer disposed on the lower surface of the polarizing film layer between the lower surface of the polarizing film layer and the light emitting layer
Data Source
AI summary
The present disclosure relates to an electronic device with a display device having enhanced display power consumption. The electronic device includes: a housing; a transparent member disposed in at least a portion of the housing, and includes an upper surface and a lower surface; a first anti-reflection layer coupled to the upper surface of the transparent member; and a display panel coupled to at least a portion of the lower surface of the transparent member by a visually transparent adhesive member, and housed in the housing. The display panel includes: a polarizing film layer coupled to the adhesive member and including an upper surface and lower surface; a light emitting layer disposed under the lower surface of the polarizing film layer; and a second anti-reflection layer disposed on the lower surface of the polarizing film layer between the lower surface of the polarizing film layer and the light emitting layer.