OLED Display Aperture Controller for Mirror Mode Power Reduction
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Solution Overview
Problem
Organic light emitting display (OLED) devices face increased power consumption when used as mirrors or for photography, as they require driving an additional camera to display an image on the screen, which is not necessary for taking photographs using external light.
Innovation Solution
An OLED device design incorporating a first substrate with organic light emitting structures, a second substrate with a light absorption area, an aperture, and a camera integrated within the display panel, utilizing a metal pattern and reflection pattern for mirror image detection and photography without displaying an image on the screen, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an additional camera is used to take photographs with the OLED device, then photography function is achieved, but power consumption increases
Solution Approach 1:
The OLED display screen is designed to perform multiple functions: it can display images normally and also function as a camera sensor for photography. The display panel includes a sensor layer that detects external light, allowing the screen itself to capture images without requiring a separate camera module, thereby reducing power consumption while maintaining photography capability
Solution Approach 2:
The patent combines the display function and camera function into a single integrated structure. The OLED display panel incorporates light sensing capabilities directly within the display layers, merging what were previously separate components (display screen and camera) into one unified device that can both display and capture images
2Adaptability or versatility
If the OLED device is used as a mirror with a metal layer, then mirror function is achieved, but power consumption increases
Solution Approach 1:
The OLED display employs periodic switching between display mode and mirror mode. When not displaying images, the screen switches to reflector mode to function as a mirror. This periodic action allows the device to provide mirror functionality only when needed, reducing overall power consumption compared to continuously operating the display
Solution Approach 2:
The OLED screen is designed to serve dual purposes: displaying images when powered and reflecting light as a mirror when not displaying. This multi-functionality eliminates the need for separate mirror or camera components, reducing power consumption while maintaining versatility
3Productivity
If an image is displayed on the screen for photography, then image capture is achieved, but power consumption increases
Solution Approach 1:
The patent extracts the light sensing function from the display operation. Instead of requiring the display to actively show an image for photography, the sensor layer within the display structure detects external light directly. This separation allows image capture to occur without the energy-intensive process of actively displaying an image on the screen
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
Enables photography using external light without displaying an image on the screen, reducing power consumption by eliminating the need for an additional camera and minimizing image display on the OLED device.
Implementation Method 1
Positive holes from the anode may be coupled with electrons from the cathode in the organic layer between the anode and the cathode to emit light
Implementation Method 2
a metal layer having a high reflectivity may be used for an upper substrate, so that a user may use the OLED device as a mirror as well
Implementation Method 3
the second substrate having a light absorption area
Data Source
AI summary
An organic light emitting display device includes a first substrate having a plurality of organic light emitting structures thereon, a second substrate facing the first substrate to encapsulate the organic light emitting structures, an aperture under a lower surface of the first substrate, and an aperture controller under the lower surface of the first substrate. The organic light emitting structures define a pixel area. The second substrate has a light absorption area. The aperture corresponds to the light absorption area. The aperture controller is adjacent to the aperture.