Pixel Circuit Ambient Light Compensation
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Solution Overview
Problem
Current light-emitting diode display devices are susceptible to interference from ambient light, which affects the display quality by altering the brightness and visibility of the display image.
Innovation Solution
A pixel circuit comprising a light-emitting component, a first light sensor, and a variable resistor, where the light sensor generates a control voltage based on the intensity of sensed light, and the variable resistor adjusts its resistance value to modify the driving current through the light-emitting component, thereby dynamically adjusting the brightness in response to ambient light conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the light-emitting component operates at high brightness to maintain display quality, then the display visibility is improved, but the interference from ambient light becomes more significant
Solution Approach 1:
The patent implements a feedback mechanism where the light sensor continuously monitors ambient light intensity and feeds this information back to the light-emitting component through the variable resistor. This closed-loop system automatically adjusts the display brightness based on real-time ambient light conditions, resolving the contradiction between maintaining high brightness for visibility and reducing ambient light interference.
Solution Approach 2:
The patent introduces dynamic adjustment capability through the variable resistor that changes resistance based on light sensor output. This transforms the static brightness into a dynamic parameter that adapts to changing ambient light conditions, allowing the display to optimize its brightness level continuously rather than operating at a fixed high brightness level.
2Object-affected harmful factors
If a light sensor and variable resistor are added to adjust brightness dynamically, then the resistance to ambient light interference is improved, but the device complexity increases
Solution Approach 1:
The light sensor serves multiple functions: it detects ambient light intensity for brightness adjustment and also provides feedback control signal. The variable resistor simultaneously acts as a control element and a signal processing component. This multi-functionality reduces the need for additional dedicated components, thereby limiting the increase in device complexity while achieving effective ambient light interference resistance.
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 effectively reduces the interference of ambient light on the display, maintaining the display quality by dynamically adjusting the brightness of the light-emitting component according to the sensed light intensity.
Implementation Method 1
The first light sensor receives a first operation voltage and provides a first control voltage according to an intensity of a first sensed light
Data Source
AI summary
A pixel circuit and a display device are provided. The pixel circuit includes a light-emitting component, a first light sensor, and a variable resistor. The first light sensor receives a first operation voltage, and provides a first control voltage according to an intensity of a first sensed light. The variable resistor adjusts a resistance value provided therefrom according to the first control voltage so as to adjust a current value of a driving current flowing through the light-emitting component.