OLED Display Segmented Transmission and Reflection Regions
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Solution Overview
Problem
Organic light emitting diode (OLED) displays face challenges in increasing luminance without significantly increasing power consumption, as higher luminance levels lead to increased energy consumption.
Innovation Solution
The OLED display incorporates a transmission region with a pixel electrode, organic emission layer, and common electrode configured to transmit light, and a reflection region with a control electrode and liquid crystal capsules that control the reflection of external light, with the reflection rate proportional to the luminance of the transmission region, allowing for enhanced outdoor visibility without increased power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the luminance of emitted light is increased, then the visibility of the OLED display is improved, but the power consumption increases significantly
Solution Approach 1:
The OLED display is divided into two functional regions: a transmission region that emits light from the organic emission layer, and a reflection region that reflects external light. This segmentation allows different mechanisms to serve different viewing needs, reducing overall power consumption while maintaining visibility.
Solution Approach 2:
The reflection region serves multiple functions: it reflects external light to enhance visibility in bright environments, and its reflectivity can be dynamically controlled to be proportional to the luminance of the transmission region. This multi-functionality allows the display to adapt to different lighting conditions without increasing power consumption.
2Illumination intensity
If the luminance of emitted light is increased, then the visibility in bright environments is improved, but the energy efficiency deteriorates
Solution Approach 1:
The reflectivity of the reflection region is dynamically adjusted based on the luminance of the transmission region. When the transmission region emits higher luminance, the reflection region's reflectivity increases proportionally, optimizing energy utilization by reflecting more external light when the display is already bright, thus reducing the need for additional power consumption.
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
This configuration effectively increases outdoor visibility by controlling the reflection of external light, thereby enhancing luminance without the need for increased power consumption, improving the display's performance in bright environments.
Implementation Method 1
Holes and electrons injected to organic emission layers are combined to generate excitons. Such excitions emit light when discharging energy
Implementation Method 2
The reflection region includes a control electrode, liquid crystal capsules, and the common electrode. The reflection region is configured to reflect the external light to the first direction
Data Source
AI summary
An organic light emitting diode (OLED) display includes a transmission region and a reflection region. When external light is incident on the OLED display, a reflection rate of the external light of the reflection region is proportional to luminance of the transmission region. The transmission region includes a pixel electrode, an organic emission layer, and a common electrode. The transmission region is configured to transmit light emitted from the organic emission layer to a first direction. The reflection region includes a control electrode, liquid crystal capsules, and the common electrode. The reflection region is configured to reflect the external light to the first direction.