OLED Display Device with Integrated Sensor Panel for Object Scanning
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Solution Overview
Problem
Conventional liquid crystal display (LCD) touch devices lack a scanning function, requiring external devices like cameras to capture scan images, necessitating a display device that can scan objects in front of it.
Innovation Solution
A display device incorporating a pattern panel with organic light-emitting diode (OLED) pixels, a sensor panel, and an image creator to sense and process input light, allowing for the creation of full images of objects by selectively allowing input light to pass through transparent and opaque windows, arranged in patterns like pin-hole or modified uniformly redundant array (MURA) patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a separate external device such as a camera is used to acquire scan images, then the scanning function can be implemented, but the device complexity increases and portability is reduced
Solution Approach 1:
The patent merges the display panel and sensor panel into a single integrated display device. The display panel serves dual purposes: displaying information and acting as a light source for scanning objects. The sensor panel is integrated behind the display panel to capture reflected light, eliminating the need for separate external cameras or scanning devices.
Solution Approach 2:
The display panel is designed to perform multiple functions simultaneously: it displays visual information to users while also serving as an active illumination source for scanning documents or objects. The same display structure that presents information becomes the light source for the scanning function, achieving multi-functionality without adding separate components.
2Device complexity
If the display panel is used for both display and scanning functions, then the device complexity is reduced, but the display quality and scanning performance may be compromised
Solution Approach 1:
The display panel is segmented into multiple independently controllable pixel regions. By selectively activating specific pixel groups as light sources and others as sensors, the system can simultaneously perform display and scanning functions with high precision. The pixel-level control allows optimized performance for each function without compromising the other.
Solution Approach 2:
Different regions of the display panel are assigned different functions based on local requirements. Some pixel regions are optimized for light emission with higher brightness, while adjacent regions are optimized for light sensing with higher sensitivity. This local differentiation maintains high image quality for both display and scanning functions.
3Measurement precision
If multiple pixel groups are used for scanning, then the scanning coverage and image quality improve, but the control complexity increases
Solution Approach 1:
The control system operates in periodic cycles, sequentially activating different pixel groups for light emission and sensing. Each cycle processes a specific region or pattern, and the results are accumulated to form the complete scanned image. This periodic operation simplifies the control logic compared to simultaneous multi-region control.
Solution Approach 2:
The scanning process maintains continuous useful action by overlapping the activation patterns of different pixel groups. While one group is emitting light, adjacent groups are preparing to sense or emit, ensuring no gaps in the scanning coverage. This continuous operation improves scanning efficiency and reduces control complexity.
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
Enables scanning and display of objects with improved image quality and depth perception, allowing for real-time visualization of scanned images on both front and rear displays, even when the object is partially occluded.
Implementation Method 1
Each of the plurality of organic light emitting diode pixels may include an IR unit to emit IR light toward the object to be scanned
Implementation Method 2
a sensor panel to sense N images from input light that is received in association with an object to be scanned and is received through a portion of the plurality of display pixels
Data Source
AI summary
A display device, and a method of operating and manufacturing the display device may receive input light from an object to be scanned that is positioned in front of a display for displaying an image, and may perform scanning of the object to be scanned.