Optical Sensor Partitions for Rollable Displays
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Solution Overview
Problem
In rollable display devices, the integration of optical sensors is hindered by increased crosstalk and potential damage due to the lack of effective isolation structures between the light emitter and receiver, especially when the display is extended or moved, leading to performance deterioration.
Innovation Solution
The implementation of a mechanical structure with partitions, such as sponge or tape, between the light emitter and receiver, which changes shape to maintain isolation even during display movement, ensuring effective separation and reducing crosstalk, thereby enhancing optical sensor performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If no isolation structure is provided between light emitter and receiver, then device complexity is reduced, but crosstalk increases and optical sensor performance deteriorates
Solution Approach 1:
The patent employs a flexible partition member (sponge or tape) that can deform to maintain isolation between the light emitter and receiver during display movement. This flexible structure provides effective light blocking without requiring rigid complex mechanisms, thus improving optical sensor performance while keeping the overall device structure relatively simple.
2Reliability
If rigid isolation structure is used between light emitter and receiver, then crosstalk is reduced, but the structure may be deviated or crushed during display movement
Solution Approach 1:
The patent uses a flexible partition member made of sponge or tape material that can deform elastically during display movement. This flexibility allows the isolation structure to accommodate mechanical movements without deviation or crushing, maintaining both isolation effectiveness and structural durability throughout the display's operational range.
Solution Approach 2:
The sponge or tape partition member acts as a cushioning element that absorbs mechanical stresses and deformations during display movement. By providing this beforehand cushioning, the isolation structure is protected from crushing or permanent deformation, ensuring it maintains its isolation function even under repeated mechanical stress during rollable display operation.
3Reliability
If isolation structure is placed close to optical sensor, then crosstalk is reduced, but physical pressure during display movement may damage the sensor
Solution Approach 1:
The flexible partition member can deform to maintain optimal positioning between the light emitter and receiver during display movement, ensuring effective crosstalk reduction. Its flexibility allows it to absorb physical pressure without transmitting damaging forces to the optical sensor, thus reducing crosstalk while protecting the sensor from mechanical damage.
Solution Approach 2:
The sponge or tape partition member provides cushioning protection to the optical sensor area during display movement. By absorbing and distributing physical pressure before it reaches the sensor, this beforehand cushioning mechanism enables the isolation structure to be positioned close to the sensor for effective crosstalk reduction without risking sensor damage from mechanical stress.
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 effectively reduces crosstalk and prevents damage to the optical sensor, improving signal clarity and maintaining sensor performance across various display configurations.
Implementation Method 1
The optical sensor may determine information of an object, such as the shape and motion of the object, by measuring the amount of light generated by the light emitter, reflected by the object, and returned to the light receiver
Implementation Method 2
a first partition located between the light emitter and the light receiver... a second partition present between the light emitter and the light receiver
Data Source
AI summary
According to the present disclosure an electronic device is disclosed comprising: a housing including a front surface, a rear surface facing the direction opposite to the front surface, and a side surface encompassing the space between the front surface and the rear surface; a display included in the housing and visible to the outside of the electronic device through the front surface; an optical sensor positioned between the display and the rear surface overlapping at least one region of the display when viewed from above the front surface, and including a light-emitting part and a light-receiving part; and a first partition positioned between the light-emitting part and the light-receiving part based on the electronic device having a first shape, and a second partition present between the light-emitting part and the light-receiving part based on the electronic device having a second shape transformed from the first shape, wherein a straight line connecting the light-emitting part and the light-receiving part is perpendicular to the direction in which the electronic device changes from the first shape to the second shape.