Stacked-Screen Backlight Temperature Sensing for Color Compensation
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Solution Overview
Problem
Liquid crystal display devices generate heat during operation, leading to temperature changes that affect color temperature and display effect, and existing solutions either block light or increase production costs.
Innovation Solution
A stacked-screen display device with a backlight module containing temperature sensors symmetrically distributed on a reflector to detect temperature, allowing accurate compensation of the display panel's color coordinates based on the backlight module's temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If temperature sensors are installed in the display device to detect temperature and compensate display effects, then display effect stability is improved, but device complexity increases
Solution Approach 1:
The patent uses the backlight module temperature as an intermediary indicator to represent the display panel temperature. Instead of directly installing temperature sensors in the display panel, the system detects the temperature of the backlight module (which has similar temperature characteristics) and uses this indirect measurement to compensate for display effects, thereby reducing device complexity while maintaining display stability
Solution Approach 2:
The patent creates a simplified model by copying the temperature detection function to the backlight module. The backlight module serves as a representative copy of the display panel's thermal characteristics, allowing temperature compensation without requiring direct temperature sensing in the display panel itself
2Measurement precision
If temperature sensors are arranged on the reflector to detect backlight module temperature, then temperature detection accuracy is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs asymmetric temperature sensor arrangement patterns (such as arranging sensors at four vertices or at geometric centers of sub-areas) that are easier to manufacture while still achieving accurate temperature detection. These asymmetric patterns break the need for perfectly symmetric precision while maintaining measurement effectiveness
Solution Approach 2:
The patent divides the reflector into multiple sub-areas (such as four quadrants) and arranges temperature sensors in each sub-area. This segmentation allows for more flexible and manufacturable sensor placement while improving temperature detection accuracy through localized measurements, reducing the overall precision requirements compared to a single centralized sensor
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
Improves temperature detection accuracy and display effect stability by compensating for temperature changes in the display panel, reducing manufacturing costs and maintaining consistent brightness.
Implementation Method 1
the backlight module is provided with temperature sensors, the temperature sensors are configured to detect a temperature of the backlight module
Implementation Method 2
the backlight module includes a backplane, a reflector and a diffuser which are stacked in sequence
Data Source
AI summary
A stacked-screen display device and a method for controlling a display device are provided. The stacked-screen display device includes a backlight module, a light control panel and a display panel which are stacked in sequence, where the backlight module includes a backplane, a reflector and a diffuser which are stacked in sequence, and the reflector is provided with a plurality of light-emitting units, the backlight module is provided with temperature sensors, the temperature sensors are configured to detect the temperature of the backlight module to compensate the display panel according to the temperature.