Display Panel Photo Spacer Density for Sensor Light Transmittance
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Solution Overview
Problem
The existing display panel technologies face challenges in achieving high light transmittance in the sensor light-receiving area due to high distribution density and thickness of photo spacers and organic films, which impede the light-receiving efficiency of optical sensors.
Innovation Solution
The proposed solution involves reducing the distribution density and area of photo spacers and the thickness of organic films in the sensor light-receiving area, with a lower density of second photo spacers and pixel openings compared to the display area, using an organic photoresist material, and a structured layer configuration that includes a light-emitting function layer, pixel defining layer, and anodes to enhance light transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If photo spacers and organic films are retained in the sensor light-receiving area to maintain display area, then display area is increased, but light transmittance decreases causing poor light-receiving effect
Solution Approach 1:
The patent applies local quality by differentiating the photo spacer configuration between the display area and sensor light-receiving area. In the sensor light-receiving area, the photo spacer distribution density is reduced and individual photo spacer areas are minimized compared to the display area, creating locally optimized light transmission properties where needed without compromising overall display functionality
Solution Approach 2:
The patent segments the photo spacer layer into two distinct regions: first photo spacers in the display area with normal distribution density, and second photo spacers in the sensor light-receiving area with reduced distribution density. This segmentation allows independent optimization of each region's properties to meet different functional requirements
2Illumination intensity
If photo spacer distribution density is reduced in sensor light-receiving area to improve light transmittance, then light-receiving effect improves, but structural support and film formation may be compromised
Solution Approach 1:
The patent changes the parameters of photo spacers in the sensor light-receiving area by reducing both the distribution density and the area of individual photo spacers compared to those in the display area. This parameter optimization allows sufficient light transmission while maintaining adequate structural support for the organic films
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 improves light transmittance in the sensor light-receiving area, enabling better light-receiving performance for optical sensors and supporting full-screen display capabilities.
Implementation Method 1
the photo spacer layer includes a plurality of first photo spacers disposed in the display area and arranged at intervals with each other, and a plurality of second photo spacers disposed in the sensor light-receiving area and arranged at intervals with each other; wherein a distribution density of the plurality of second photo spacers is less than a distribution density of the plurality of first photo spacers
Data Source
AI summary
A display panel and a display device are disclosed. The display panel includes an array substrate, a photo spacer layer, and a light-emitting function layer. The photo spacer layer and the light-emitting function layer are sequentially disposed on the array substrate. The display panel includes a display area and a sensor light-receiving area, The light-emitting function layer is disposed in the display area and the sensor light-receiving area. The photo spacer layer includes a plurality of first photo spacers disposed in the display area and a plurality of second photo spacers disposed in the sensor light-receiving area. A distribution density of the second photo spacers is less than a distribution density of the first photo spacers.