Optical Measurement Module With Blocking Layer For Light Detection
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Solution Overview
Problem
Accurate measurement of light brightness in electronic devices is challenging due to interference from environmental factors, which affects the reliability of light detection and adjustment processes.
Innovation Solution
An optical measurement module comprising a detection sub-circuit and a comparison sub-circuit with a blocking layer, where both sub-circuits have identical photosensitive elements, allowing for the isolation of light irradiation effects from environmental influences, enabling precise light intensity calculation by comparing output signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single photosensitive element is used for light detection, then the device structure is simple, but the measurement precision is low due to environmental factor interference
Solution Approach 1:
The detection system is segmented into two parallel sub-circuits: a detection sub-circuit with a first photosensitive element that receives both light irradiation and environmental factors, and a comparison sub-circuit with a second photosensitive element that receives only environmental factors (blocked from light by a blocking layer). This segmentation allows separate measurement of light effects and environmental effects, enabling accurate light brightness measurement by subtracting the comparison signal from the detection signal.
2Measurement precision
If environmental factors are blocked from the photosensitive element, then measurement precision improves, but the device complexity increases due to additional blocking structures
Solution Approach 1:
The blocking layer is applied selectively and locally - it covers only the second photosensitive element in the comparison sub-circuit, while leaving the first photosensitive element in the detection sub-circuit uncovered. This local application of the blocking function allows the system to isolate environmental factors for the comparison element without affecting the detection element, achieving precise environmental factor measurement with minimal additional 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
This solution enhances the accuracy of light detection by isolating the effects of light irradiation from environmental factors, resulting in improved light measurement and adjustment capabilities in electronic devices.
Implementation Method 1
the detection sub-circuit includes a first photosensitive element, and the detection sub-circuit is configured to output a detection signal according to light irradiation received by the first photosensitive element
Implementation Method 2
the comparison sub-circuit includes a second photosensitive element, the comparison sub-circuit is configured to output a comparison signal according to an input signal of the comparison sub-circuit
Data Source
AI summary
The present disclosure provides an optical measurement module which includes a detection sub-circuit, a comparison sub-circuit and a blocking layer, the blocking layer includes at least one blocking element, the detection sub-circuit comprises a first photosensitive element, and the detection sub-circuit is configured to output a detection signal according to light irradiation received by the first photosensitive element and an input signal of the detection sub-circuit; the comparison sub-circuit includes a second photosensitive element, the at least one blocking element in the blocking layer covers at least the second photosensitive element, the comparison sub-circuit is configured to output a comparison signal according to an input signal of the comparison sub-circuit; wherein the first photosensitive element and the second photosensitive element have a same structure, so that they have a same response to light irradiation and a same response to environment.