Sensor Package Module Overlapping Active Area for Thin Bezel OLED
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Solution Overview
Problem
The challenge is to implement a thin bezel in organic light-emitting display devices while minimizing power consumption and maintaining image quality, as traditional sensor packages require holes in the bezel area for light reception and emission, limiting bezel width and increasing power consumption due to reduced transmittance.
Innovation Solution
A sensor package module is designed to overlap the active area of the display panel, eliminating the need for holes in the bezel by using a camera module and proximity sensor with a light receiver and emitter, and optimizing the cathode layer's thickness for increased transmittance, allowing the sensor package to operate without bezel holes and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If holes are formed in the bezel area for sensor light reception and emission, then sensors can perform proximity processing and light detection, but the bezel width increases and display area is reduced
Solution Approach 1:
The sensor package is positioned in the active area dimension rather than requiring horizontal space in the bezel area. By utilizing the vertical stacking capability and placing the sensor package at a specific position overlapping the active area, the invention transforms the spatial requirement from a horizontal bezel constraint to a vertical layering solution, enabling thin bezel design while maintaining sensor functionality.
2Use of energy by moving object
If the cathode layer thickness is increased to improve electrical conductivity, then power consumption increases, but if thickness is decreased to reduce power consumption, then transmittance decreases affecting sensor operation
Solution Approach 1:
The invention optimizes the cathode layer thickness to a specific range (50-150 nm) that balances electrical conductivity and optical transmittance. By precisely controlling the thickness parameter, the solution achieves sufficient conductivity for low power consumption while maintaining adequate light transmittance for sensor operation, resolving the trade-off between these two opposing requirements.
Solution Approach 2:
The cathode layer is designed with different thickness characteristics in different regions: in the active area where the sensor package is positioned, the cathode layer has optimized thickness for transmittance, while in other areas it maintains sufficient thickness for conductivity. This localized quality variation allows simultaneous optimization of both power consumption and sensor performance.
3Ease of operation
If the sensor package is positioned in the bezel area, then sensors can access light, but the bezel must be wider to accommodate the sensor package and holes
Solution Approach 1:
The sensor package is positioned in the active area dimension rather than requiring horizontal space in the bezel area. By utilizing the vertical stacking capability and placing the sensor package at a specific position overlapping the active area, the invention transforms the spatial requirement from a horizontal bezel constraint to a vertical layering solution, enabling thin bezel design while maintaining sensor functionality.
Solution Approach 2:
The active area serves dual functions: displaying images and housing the sensor package for light reception and emission. This multi-functional use of the active area eliminates the need for separate bezel space for sensors, allowing the bezel to be minimized while maintaining both display and sensing capabilities.
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 enables a thinner bezel design while preventing power consumption increases and image quality deterioration by using the display panel's transmittance to facilitate sensor operation, thus enhancing the display's efficiency and aesthetics.
Implementation Method 1
a light emitter that drives a light-emitting device to emit light
Implementation Method 2
a light receiver that drives a light receiving sensor to sense light
Data Source
AI summary
An organic light-emitting display device includes a display panel includes an active area in which a plurality of subpixels are arrayed, and a bezel area in which lines, through which a signal and a voltage to be supplied to the subpixels are transferred, are disposed, wherein each subpixels has a cathode and an anode; a data driver supplying a data signal to the subpixels; a gate driver supplying a data signal to the subpixels; a timing controller controlling the data driver and the gate driver; and a sensor package module having a portion that overlaps the active area.