Mirror Display Temperature Control via Unified Sensor
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Solution Overview
Problem
Existing mirror display apparatuses face challenges in temperature control and display quality compensation, particularly when switching between monitor and mirror modes, due to the need for separate temperature sensors and control mechanisms for the monitor display device and the mirror optical element, which increases component count and complexity.
Innovation Solution
A mirror display apparatus with a temperature sensor and control circuit that adjusts the monitor display device's luminance and driving state in monitor mode, and adjusts the mirror optical element's driving state in mirror mode, sharing temperature sensing and control components to reduce complexity and maintain display quality and reflectance stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate temperature sensors and control mechanisms are used for the monitor display device and the mirror optical element, then temperature control and display quality compensation can be performed independently in each mode, but the component count and system complexity increase
Solution Approach 1:
The patent implements a unified temperature sensor that serves dual purposes: monitoring the monitor display device temperature during monitor mode and detecting environmental temperature during mirror mode. The control circuit processes temperature data to perform both temperature control (adjusting backlight luminance) and display quality compensation (adjusting liquid crystal driving voltage) across different operation modes, eliminating the need for separate temperature sensors and control mechanisms while maintaining reliable temperature management
2Device complexity
If a unified temperature sensor is used for both monitor display device and mirror optical element, then component count is reduced, but the ability to independently control temperature and display quality in each mode may be compromised
Solution Approach 1:
The patent employs dynamic control strategies where the control circuit adapts its processing of temperature sensor data based on the current operation mode. During monitor mode, the control circuit uses temperature data to adjust backlight luminance for temperature control and modifies liquid crystal driving voltage for display quality compensation. During mirror mode, the same temperature sensor data is used to adjust the mirror optical element's liquid crystal driving voltage to compensate for environmental temperature effects on reflectance, demonstrating flexible, mode-specific adaptability with a unified sensor
3Temperature
If temperature control measures are taken by decreasing backlight output when temperature exceeds predetermined value, then the monitor display device temperature is controlled, but the display light quantity and overall luminance are reduced
Solution Approach 1:
The patent implements temperature control by dynamically adjusting the backlight luminance output based on detected temperature values. When the monitor display device temperature exceeds a predetermined threshold, the control circuit decreases the backlight driving voltage or current, thereby reducing backlight luminance and consequently lowering the overall display luminance to control the temperature of the monitor display device
4Manufacturing precision
If the driving state of the liquid crystal panel is adjusted according to detected temperature, then display quality is maintained despite temperature variations, but the power consumption and heat generation may increase
Solution Approach 1:
The patent performs display quality compensation by adjusting the driving voltage applied to the liquid crystal panel based on detected temperature values. When environmental temperature varies from a reference temperature, the control circuit modifies the liquid crystal driving voltage to compensate for temperature-induced changes in liquid crystal optical properties, thereby maintaining consistent display quality (transmittance and chromaticity) across different operating temperatures
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 configuration allows for effective temperature control and display quality compensation in monitor mode, while reducing component count and maintaining stable reflectance in mirror mode, enhancing the apparatus's operational efficiency and reliability.
Implementation Method 1
The mirror optical element is an element in which reflectance and transmittance vary in opposite directions to each other by electric driving so that the state of the element is changeable among a transmission state having a relatively low reflectance and a relatively high transmittance, a reflection mirror state having a relatively high reflectance and a relatively low transmittance, and a reflectance-reduced reflection mirror state
Implementation Method 2
a temperature sensor and a control circuit. In the monitor mode, the control circuit adjusts the luminance of the monitor display device based on a temperature detected by the temperature sensor
Implementation Method 3
In the monitor mode, the control circuit adjusts the luminance of the monitor display device based on a temperature detected by the temperature sensor to perform temperature control of the monitor display device
Implementation Method 4
adjust the driving state of the monitor display device driven by a display signal based on a temperature detected by the temperature sensor to perform temperature compensation control related to display quality of the monitor display device
Implementation Method 5
In the mirror mode in which the mirror optical element is in the reflectance-reduced reflection mirror state, the control circuit adjusts a driving state of the mirror optical element based on a temperature detected by the temperature sensor to perform temperature compensation control of the reflectance of the mirror optical element
Data Source
AI summary
In a mirror display apparatus, a mirror optical element in which reflectance and transmittance vary in opposite directions to each other by electric driving is disposed on a front surface side of a monitor display device. An operation mode of the mirror display apparatus is switchable between a monitor mode and a mirror mode for use. A temperature sensor is installed to a mirror display apparatus. In the monitor mode, the temperature sensor is used for a temperature control of the monitor display device, or a temperature compensation control related to display quality, or the both. In the mirror mode in which the mirror optical element is in a reflectance-reduced reflection mirror state, the temperature sensor is used for a temperature compensation control of reflectance of the mirror optical element.