Display Panel UV Detection via Dual Optical Sensors
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Solution Overview
Problem
The integration of a UV sensor in electronic devices increases fabrication costs and occupies valuable layout space, making it necessary to develop a cost-effective and space-efficient UV detecting solution.
Innovation Solution
A display device with a visible-light transmissible polarizer that incorporates at least one first optical sensor exposed to external light and a second optical sensor sheltered by the polarizer, along with a sensor output computing part to calculate UV light intensity, allowing for simplified assembly and reduced space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a commercially available UV sensor is equipped in the electronic apparatus, then the UV detecting function is achieved, but the fabricating cost rises and the layout space is stringently restricted
Solution Approach 1:
The patent combines the UV detection function with the existing display panel structure by integrating optical sensors directly onto the display panel substrate. The first optical sensor detects external light (including UV) while the second optical sensor detects visible light through the polarizer, and the controller computes UV intensity by comparing these signals. This merging eliminates the need for separate UV sensor modules, thereby reducing fabrication cost and layout space while maintaining UV detection capability.
Solution Approach 2:
The display panel structure is made multi-functional by enabling it to serve both display purposes and UV detection purposes. The optical sensors integrated into the display panel can detect various types of light (external light, visible light, and UV light), allowing the same device to perform multiple functions without requiring additional dedicated components, thus reducing overall system cost and space requirements.
2Reliability
If a commercially available UV sensor is equipped in the electronic apparatus, then the UV detecting function is achieved, but the layout space is stringently restricted
Solution Approach 1:
The patent merges the UV detection functionality into the existing display panel by integrating optical sensors onto the same substrate. This eliminates the need for separate UV sensor modules and their associated mounting spaces, thereby significantly reducing the layout space required while maintaining full UV detection functionality.
Solution Approach 2:
The patent utilizes the vertical layering of the display panel structure to accommodate UV detection functionality. By placing optical sensors on the substrate and using the polarizer and light transmission paths in three-dimensional space, the system achieves UV detection without occupying additional planar layout space, effectively moving the detection function into the vertical dimension of the existing display structure.
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 solution enables UV light intensity detection while reducing fabrication costs and conserving layout space, with optional compensation for backlight and temperature influences using additional sensors.
Implementation Method 1
The first optical sensor outputs a first signal in response to a detected wavelength component of the external light
Implementation Method 2
The second optical sensor outputs a second signal in response to a detected wavelength component of the visible light
Implementation Method 3
The polarizer is visible-light transmissible
Implementation Method 4
A visible light passing through the polarizer is detectable by the second optical sensor
Data Source
AI summary
A display device includes a display panel. The display panel has a visible-light transmissible polarizer at a side of receiving an external light, and includes a first optical sensor, a second optical sensor and a sensor output computing part. The first optical sensor is disposed on a substrate of the display panel and unsheltered by the polarizer for detecting the external light. The first optical sensor outputs a first signal in response to a detected wavelength component of the external light. The second optical sensor is disposed on the substrate of the display panel and sheltered by the polarizer for detecting a visible light passing through the polarizer. The second optical sensor outputs a second signal in response to a detected wavelength component of the visible light. According to the first signal and the second signal, the sensor output computing part computes a UV light intensity of the external light.