Ambient Light Detection Circuit Using Pulse Frequency Analysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display technologies face challenges in efficiently detecting ambient light intensity, leading to suboptimal power consumption and user comfort, as current methods lack effective means to accurately adjust brightness based on ambient conditions.
Innovation Solution
A circuit comprising a light sensing sub-circuit and a detection sub-circuit that outputs a voltage pulse signal related to ambient light intensity, utilizing optical sensors and transistors to acquire the frequency of the pulse signal, allowing for precise determination of ambient light intensity through rectification and frequency analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional ambient light detection methods are used, then the detection structure is simple, but the detection accuracy is low and anti-interference ability is weak
Solution Approach 1:
The detection circuit is divided into two independent sub-circuits: a light sensing sub-circuit that converts light intensity to voltage pulse frequency, and a detection sub-circuit that measures the frequency. This segmentation allows each sub-circuit to be optimized for its specific function, improving overall detection accuracy while maintaining reasonable complexity.
Solution Approach 2:
The patent replaces traditional voltage-level detection with frequency-based detection. By converting light intensity information into voltage pulse frequency and measuring frequency instead of voltage level, the system achieves better anti-interference ability and detection accuracy, as frequency measurement is less susceptible to electrical noise and signal degradation.
2Use of energy by moving object
If ambient light detection is not implemented, then the display panel operates continuously at fixed brightness, but power consumption is high
Solution Approach 1:
The display system performs self-adjustment by automatically detecting ambient light intensity and adjusting its own brightness without external intervention. The detection circuit provides real-time feedback that enables the display to adapt to changing environmental conditions, optimizing power consumption based on actual viewing requirements.
Solution Approach 2:
The system establishes a feedback loop where the detection circuit continuously monitors ambient light and provides information to control display brightness. This closed-loop control ensures the display automatically adjusts to maintain optimal visibility while minimizing power consumption, as brightness is dynamically adjusted based on real-time environmental conditions.
3Ease of operation
If fixed brightness is used, then the display structure is simple, but user comfort is reduced in varying light conditions
Solution Approach 1:
The display brightness transitions from a static, fixed state to a dynamic, adjustable state. The brightness level is no longer fixed but continuously adapts to ambient light conditions through the detection circuit, providing automatic optimization for user comfort while the display operates in varying environmental conditions.
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 enables efficient and accurate detection of ambient light, reducing power consumption and enhancing user comfort by automatically adjusting display brightness, while offering strong anti-interference ability and high detection accuracy.
Implementation Method 1
a first optical sensor having one terminal electrically connected to a first power source; a first transistor having a first electrode electrically connected to the other terminal of the first optical sensor
Data Source
AI summary
The present application proposes a circuit and method for detecting ambient light, and a display panel. The circuit for detecting ambient light includes a light sensing sub-circuit configured to output a voltage pulse signal related to present intensity of the ambient light; and a detection sub-circuit electrically connected to the light sensing sub-circuit, and configured to acquire a frequency of the voltage pulse signal, and obtain the present intensity of the ambient light according to the frequency of the voltage pulse signal.