Embedded Sensor Module for Full-Screen Display Proportion
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Solution Overview
Problem
Designing full-screen electronic devices is challenging due to the increasing proportion of non-display areas, making it difficult to integrate sensors like proximity sensors without compromising the screen design and aesthetics.
Innovation Solution
A display screen design that embeds a sensor module beneath the light emitting layer, including transmitting and receiving units for infrared signals, allowing for distance sensing without occupying display space, and a control unit to manage signal transmission to prevent light spots, thus enabling a full-screen design with enhanced screen proportion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensors are arranged on the display surface, then distance sensing function is achieved, but screen area proportion is reduced and full-screen design is compromised
Solution Approach 1:
The sensor module is moved from the traditional planar display surface to the edge region of the display module, utilizing the side space dimension. This allows the sensors to be positioned in a region that does not occupy the active display area, thereby maintaining full-screen proportions while enabling distance sensing functionality through infrared transmitting and receiving units positioned at the edge.
Solution Approach 2:
The sensor module is integrated within the edge region of the display module structure, nesting the sensing functionality within the existing display assembly. The transmitting and receiving units are positioned within the edge framework, allowing them to share the same spatial envelope without requiring additional external space that would reduce screen proportion.
2Measurement precision
If multiple transmitting units are used, then distance sensing accuracy is improved, but light spots may be generated in the light emitting layer
Solution Approach 1:
The control unit activates each transmitting unit in sequence rather than simultaneously, creating a periodic transmission pattern. Each transmitting unit emits infrared signals at different time intervals, ensuring that the cumulative transmission time for all units remains below the threshold that would excite the light emitting layer. This temporal separation maintains sensing accuracy while preventing light spot generation.
Solution Approach 2:
The system uses multiple transmitting units but controls each unit to operate for only a portion of the total time required, rather than having all units operate continuously or simultaneously. This partial action approach ensures sufficient signal strength for accurate distance sensing while keeping the total infrared exposure below the threshold that would cause light spots in the light emitting layer.
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 allows for a full-screen design without the need for sensors on the display surface, improving screen proportion and maintaining a sleek appearance while ensuring effective distance sensing and radio frequency operations.
Implementation Method 1
a plurality of transmitting units for transmitting an infrared signal; and a receiving unit for receiving a reflected signal obtained from the infrared signal being reflected by a detected object
Implementation Method 2
The light emitted from the infrared light emitter passes through the display screen; the infrared light receiver is used for receiving infrared light reflected by the outside
Data Source
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AI summary
A display screen includes a display module (100). The display module (100) includes a light emitting layer (101) and a driving layer (102) for driving the light emitting layer (101) to emit light. The sensor module (200) is located beneath the display module (100) or located beneath the light emitting layer (101) in the display module (100). The sensor module (200) includes a plurality of transmitting units (201) for transmitting a wireless signal, and a receiving unit (202)_that is used for receiving a reflected signal obtained from the wireless signal being reflected by a detected object and determining distance information between the sensor module (200) and the detected object according to the received reflected signal. This disclosure may readily increase screen area proportion in the device.