OLED Array Substrate Rear-Mounted Photosensitive Units
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Solution Overview
Problem
Luminance non-uniformity in OLED display devices due to the placement of photosensitive units on the light-emitting side, which decreases the opening rate and accuracy of luminance compensation, and results in low light utilization and display quality.
Innovation Solution
The photosensitive units are positioned on the side of self-luminous units proximate to the base substrate, allowing light beams to exit and be incident to the photosensitive units for photoelectric induction, while maintaining real-time compensation and improving the display panel's opening rate and luminance accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If photosensitive units are placed on the light-emitting side of self-luminous units, then luminance compensation can be performed, but the opening rate decreases and luminance uniformity deteriorates
Solution Approach 1:
The patent moves the photosensitive units from the traditional light-emitting side (one-dimensional placement) to the base substrate side (another dimension), allowing light to pass through the self-luminous unit and reach the photosensitive unit from the rear. This dimensional change enables both high opening rate and accurate luminance compensation to be achieved simultaneously.
2Measurement precision
If photosensitive units are placed on the light-emitting side, then luminance compensation is possible, but luminance uniformity and display quality deteriorate
Solution Approach 1:
Instead of placing photosensitive units on the conventional light-emitting side, the patent inverts the arrangement by positioning them on the base substrate side, allowing light to be detected from the rear of the self-luminous unit. This inversion improves luminance uniformity while maintaining compensation accuracy.
3Device complexity
If photosensitive units are positioned to face the light-emitting side, then structural simplicity is maintained, but light utilization efficiency decreases
Solution Approach 1:
The patent extracts the photosensitive units from the light-emitting side structure and relocates them to the base substrate side. This separation allows the light-emitting side to maintain high opening rate and light emission efficiency, while the photosensitive units efficiently capture light from the rear, improving overall light utilization.
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 enhances the display panel's resolution and luminance uniformity by ensuring accurate luminance and color cast reflection, overcoming the limitations of previous designs and improving the overall display quality.
Implementation Method 1
a light beam incident to the light-transmitting region transmits through the light-transmitting region and are incident to the photosensitive portion of the photosensitive unit for photoelectric induction
Implementation Method 2
a light beam incident to the reflective region exits from the second electrode after being reflected
Data Source
AI summary
The embodiment of the present disclosure provides an array substrate, a display panel and a display device. The array substrate comprises a plurality of self-luminous units and photosensitive units disposed on a base substrate, wherein the photosensitive units are located on a side of the self-luminous units proximate to the base substrate, and each of the self-luminous units is correspondingly provided with the photosensitive unit; the self-luminous unit comprises a first electrode, a light-emitting functional layer and a second electrode disposed sequentially in a direction away from the base substrate; the first electrode comprises a light-transmitting region and a reflective region interconnected with each other; the second electrode is a transparent electrode.