Electrochromic Assembly for Ambient Light Reflection Control
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Solution Overview
Problem
OLED display panels face challenges in visibility due to strong reflection of ambient light, especially in bright environments, leading to increased brightness requirements that accelerate panel aging and reduce service life.
Innovation Solution
Incorporating an electrochromic assembly with light intensity detectors and a liquid crystal adjustment assembly, along with a circular polarizer, to dynamically adjust the transmittance of ambient light based on environmental conditions, ensuring optimal display visibility in both high and low light environments by modulating the electrochromic and liquid crystal states in response to ambient light thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the brightness of OLED display panel is increased to improve visibility in bright ambient light environments, then the display visibility is improved, but the panel aging is accelerated and service life is reduced
Solution Approach 1:
An electrochromic assembly is introduced as an intermediary component between the OLED light emitting portions and the ambient light. This assembly dynamically adjusts its light transmission properties based on ambient light intensity, mediating the interaction between display light and ambient light to reduce harmful reflections without requiring increased display brightness.
Solution Approach 2:
The electrochromic assembly changes its optical parameters (light transmission intensity) in response to ambient light conditions. By detecting ambient light intensity and adjusting the electrochromic state accordingly, the system modifies the transmission parameter to reduce reflected light intensity, thereby avoiding the need to increase OLED brightness and extending panel service life.
2Illumination intensity
If an electrochromic assembly is added to reduce ambient light reflection, then the display visibility in bright environments is improved, but the device complexity increases
Solution Approach 1:
The electrochromic assembly is integrated with the OLED display structure by positioning it on the light-emergent side of the display panel. The assembly includes electrochromic portions that correspond to light emitting portions, creating a merged structure where the electrochromic layers work in conjunction with the OLED sub-pixel units without requiring separate independent systems.
Solution Approach 2:
The electrochromic assembly serves multiple functions: it reduces ambient light reflection to improve visibility, and it can be controlled through a simple voltage application mechanism between first and second electrodes. The same structure that provides optical filtering also enables controllable light transmission, combining multiple benefits in a single integrated component.
3Object-affected harmful factors
If the electrochromic assembly is modulated to a color rendering state to reduce reflection, then the ambient light reflection is reduced, but the light transmission for display content is decreased
Solution Approach 1:
The electrochromic assembly dynamically adjusts its state based on ambient light intensity detected by light intensity detectors. In bright ambient light conditions, it transitions to a color rendering state to reduce harmful reflections. In low ambient light conditions, it transitions to a transparent state to maximize light transmission for display content, creating a dynamic adaptation system.
Solution Approach 2:
The system proactively adjusts the electrochromic assembly state in advance based on detected ambient light intensity. When ambient light exceeds a threshold, the controller applies voltage to transition the electrochromic portions to the color rendering state before excessive reflection occurs, preventing the harmful effect rather than correcting it afterward.
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 solution effectively reduces ambient light reflection in bright conditions while maintaining adequate light transmission in low-light environments, enhancing display clarity and extending the OLED panel's service life by optimizing power consumption and reducing brightness-related stress.
Implementation Method 1
the electrochromic assembly comprises a plurality of electrochromic portions covering the plurality of light emitting portions, respectively; and the transmittance of the plurality of electrochromic portions for ambient light varies with a change in the incident intensity of ambient light
Implementation Method 2
a light intensity detector configured to detect an incident intensity of ambient light
Implementation Method 3
a liquid crystal adjustment assembly between the electrochromic assembly and the plurality of light emitting portions, or on a side of the electrochromic assembly distal to the plurality of light emitting portions
Data Source
AI summary
A display panel, a method for preparing a display panel and a method for adjusting an intensity of ambient light reflected on a display panel are provided in embodiments of the disclosure. The display panel includes: a base substrate; a plurality of sub-pixel units (20) on the base substrate comprising a plurality of light emitting portions respectively; an electrochromic assembly on a light-emergent side of the plurality of light emitting portions; and a light intensity detector configured to detect an incident intensity of ambient light, and the electrochromic assembly comprises a plurality of electrochromic portions covering the plurality of light emitting portions, respectively; and transmittance of the plurality of electrochromic portions for ambient light varies with a change in the incident intensity of ambient light.