Array Substrate with Locally Transparent Region for Display Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current array substrates for display devices face issues with brightness attenuation and reduced lifespan when used for 'full screen' designs, particularly when the front camera requires a transparent region, leading to uneven display resolution and reduced pixel density in the locally transparent area.
Innovation Solution
The array substrate incorporates a base substrate with a display region and a locally transparent region, featuring first and second pixels with different reflective electrodes and light emitting layers, where the second pixel has a higher reflectivity transflective electrode, enhancing light emitting efficiency and reducing current density, thus prolonging lifespan and improving display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a transparent region is created for the front camera in a full screen display design, then the screen ratio is increased, but the pixel density and display resolution in the transparent region are reduced
Solution Approach 1:
The patent applies local quality by creating different pixel structures in different regions: the first pixels in the display region use a first transflective electrode structure, while the second pixels in the locally transparent region use a second transflective electrode structure with higher reflectivity. This allows the transparent region to maintain adequate display resolution while providing the necessary transparency for the front camera.
Solution Approach 2:
The display region is segmented into multiple pixel types (first pixels and second pixels) with different structural characteristics. The first pixels are designed for standard display performance, while the second pixels are specifically designed for the locally transparent region with modified transflective electrode properties to balance transparency and display quality.
2Illumination intensity
If the reflectivity of the transflective electrode is increased to improve light emitting efficiency, then the luminous brightness is improved, but the transmittance in the transparent region is reduced
Solution Approach 1:
Different reflectivity levels are applied locally: the first transflective electrode in the display region has a first reflectivity, while the second transflective electrode in the locally transparent region has a second reflectivity that is higher than the first. This local differentiation allows each region to optimize its performance for its specific function.
Solution Approach 2:
The patent changes the reflectivity parameter of the transflective electrode based on the regional requirements. By adjusting the reflectivity parameter of the second transflective electrode to be higher than the first, the patent optimizes light emitting efficiency in the transparent region while maintaining the necessary transparency through the pixel structure design.
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 solution results in improved luminous brightness and extended lifespan of the second pixel, maintaining high display quality and resolution, while allowing for increased screen ratio by optimizing the microcavity structure and pixel distribution.
Implementation Method 1
a reflectivity of the second transflective electrode is greater than a reflectivity of the first transflective electrode
Implementation Method 2
the cathode and the anode of the organic light emitting diode can form a semiconductor microcavity capable of narrowing the spectrum, so that photons generated by the light emitting layer are limited in the semiconductor microcavity formed by the cathode and the anode and form strong multiple-beam interference
Data Source
AI summary
An array substrate, a display device, and a driving method thereof. The array substrate includes a base substrate including a display region and a locally transparent region located within the display region, the locally transparent region including at least one sub-region, and the sub-region including at least one transparent region; at least one first pixel, including a first reflective electrode, a first transflective electrode, and a first light emitting layer located between the first reflective electrode and the first transflective electrode, the first pixel being located in the display region; and at least one second pixel, comprising a second reflective electrode, a second transflective electrode, and a second light emitting layer located between the second reflective electrode and the second transflective electrode, the second pixel being located in an region other than the transparent region in the sub-region.