Display Panel Infrared Sensor Integration via Circuit Density Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge is to enhance infrared light transmittance in display panels with integrated infrared sensors, as high wiring density in backplane circuits reduces infrared light transmittance, preventing effective infrared detection and other intelligent functions.
Innovation Solution
The solution involves a display panel design with a first and second display area, where the distribution density of electroluminescent display devices is uniform across both areas, and the pixel drive circuit density is lower in the second area, allowing for the placement of sensors on the back without overlapping with pixel drive circuits, thus increasing screen transmittance and eliminating bezel space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If photosensitive elements such as infrared sensors are placed on the front bezel to achieve intelligent functions, then the infrared detection function can be implemented, but the bezel area increases and the screen ratio decreases
Solution Approach 1:
The patent moves the infrared sensor from the traditional front bezel area to the backplane circuit area, utilizing the vertical space dimension. By placing the sensor on the back of the display panel where wiring is less dense, the sensor can detect infrared light through the panel without occupying front bezel space, thus maintaining a high screen ratio while achieving infrared detection functionality
Solution Approach 2:
The display panel itself serves as an intermediary medium, allowing infrared light to pass through the panel from the back to reach the sensor. This eliminates the need for a separate front bezel opening, as the panel structure enables both display function and sensor operation simultaneously
2Area of stationary object
If photosensitive elements are placed on the back of the display screen to reduce bezel area, then the screen ratio increases, but the wiring density in the backplane circuit reduces infrared light transmittance, preventing effective infrared detection
Solution Approach 1:
The patent applies local quality by creating a specific low-wiring-density region on the backplane circuit where the infrared sensor is placed. While other areas of the backplane maintain high wiring density for signal transmission, the sensor region is designed with reduced wiring to allow sufficient infrared light transmittance, thus resolving the contradiction between compact integration and optical performance
3Manufacturing precision
If the density of pixel drive circuits is increased to improve display performance, then the display quality improves, but the area available for sensor placement decreases and infrared light transmittance is further reduced
Solution Approach 1:
The patent segments the display panel into distinct functional regions: a first area with high pixel drive circuit density for optimal display performance, and a second area with lower wiring density specifically designated for the infrared sensor. This spatial segmentation allows both high-quality display and effective infrared detection to coexist without mutual interference
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 design enhances infrared light transmittance, enabling effective infrared detection and increasing the screen ratio by reducing pixel drive circuit density in specific areas, allowing for a narrower bezel and improved sensor performance.
Implementation Method 1
the pixel units include electroluminescent display devices and pixel drive circuits for driving the electroluminescent display devices to emit light
Data Source
AI summary
A display panel, a manufacture method thereof and a display apparatus are provided. The display panel includes a display area, which includes a plurality of pixel units, wherein the pixel units include electroluminescent display devices and pixel drive circuits for driving the electroluminescent display devices to emit light; the electroluminescent display devices include light-emitting devices and virtual light-emitting devices; the light-emitting devices are electrically connected with the pixel drive circuits, while the virtual light-emitting devices are not connected with the corresponding pixel drive circuits; the display area includes a first display area and a second display area; and in the first display area and the second display area, the distribution density of the electroluminescent display devices is the same, and the density of the pixel drive circuits in the second display area is less than that of the pixel drive circuits in the first display area.