Display-Embedded Sensor Shielding Structure Against Stray Light
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Solution Overview
Problem
When a sensor, such as a photosensor, is disposed in a display panel, it is often irradiated by stray light, which interferes with its ability to sense an image effectively.
Innovation Solution
An electronic device comprising a substrate, a semiconductor element, and a shielding element with specific portions disposed to surround and protect the sensor, reducing the impact of stray light. The shielding element includes a first portion between the semiconductor layer and the substrate, a second portion surrounding the side surface of the semiconductor element, and a third portion positioned between the semiconductor element and the backlight module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sensor is disposed in the display panel, then the sensor can sense images, but the sensor is irradiated by stray light which affects sensing accuracy
Solution Approach 1:
A shielding element is introduced as an intermediary component between the light source and the sensor. This shielding element blocks stray light from reaching the sensor while allowing the sensor to function normally, thus resolving the contradiction between maintaining sensor accuracy and preventing stray light interference.
Solution Approach 2:
The shielding element is divided into multiple portions (first portion, second portion, third portion) that are disposed at different locations. The first portion is between the bottom surface of the semiconductor layer and the substrate, the second portion surrounds the side surface of the semiconductor element, and the third portion is between the semiconductor element and the backlight module. This segmentation allows comprehensive stray light blocking from multiple directions.
2Measurement precision
If a shielding element is added to block stray light, then sensor accuracy improves, but device complexity increases
Solution Approach 1:
The shielding element is integrated with the existing semiconductor element structure. The shielding element's multiple portions are disposed in coordination with the semiconductor element's geometry, merging the shielding function with the existing device architecture rather than adding completely separate components.
Solution Approach 2:
The shielding element serves multiple functions: it blocks stray light from the substrate side (first portion), surrounds the side surfaces (second portion), and blocks light from the backlight module side (third portion). This multi-functional design achieves comprehensive protection without requiring separate shielding components for each direction.
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
The described configuration effectively shields the sensor from stray light, enhancing its ability to accurately sense images by minimizing light interference.
Implementation Method 1
a shielding element comprising a first portion, a second portion and a third portion. The first portion is disposed between the bottom surface of the semiconductor layer and the substrate, the second portion surrounds the side surface of the semiconductor element
Data Source
AI summary
An electronic device comprises a substrate, a semiconductor element disposed on the substrate and comprising a top surface, a bottom surface and a side surface connected between the top surface and the bottom surface, and a shielding element comprising a first portion, a second portion and a third portion. The first portion is disposed between the bottom surface of the semiconductor layer and the substrate, the second portion surrounds the side surface of the semiconductor element, and the semiconductor element is disposed between the first portion and the third portion.