Backlight Module Dynamic Resistance Adjustment for 3D Display Brightness
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Solution Overview
Problem
Existing 2D/3D image switching technologies fail to adjust light intensity simultaneously when switching from 2D to 3D displays, resulting in decreased overall light intensity and lower image quality due to unadjusted light sources.
Innovation Solution
A backlight module with a light emitter unit, resistor module, inverter, and balance circuit that adjusts resistance values to increase current flow and light intensity when switching to 3D mode, using cold cathode fluorescent lamps or light emitting diodes, ensuring higher light intensity for 3D image display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display is switched to 3D image mode, then the image depth perception is improved, but the light intensity deteriorates
Solution Approach 1:
The patent implements dynamic light intensity adjustment by switching between different resistance values in the resistor module based on display mode. When in 3D mode, the system dynamically changes the resistance configuration to increase current flow and compensate for the reduced transmittance, thereby maintaining appropriate light intensity levels throughout mode transitions.
Solution Approach 2:
The system changes the electrical resistance parameter of the light emitter unit according to display mode. By adjusting the resistance value in the resistor module, the current flowing through the light emitter unit is modified, which directly changes the light intensity output to match the requirements of different display modes.
2Adaptability or versatility
If the transmittance is decreased for 3D image generation, then the image parallax is improved, but the overall light intensity deteriorates
Solution Approach 1:
The system applies preliminary anti-action by pre-compensating for the expected light loss when switching to 3D mode. The resistor module is configured to provide lower resistance before or during the transition to 3D mode, which increases the current and light output in advance to counteract the transmittance reduction, preventing the overall light intensity from deteriorating.
3Device complexity
If the light source is not adjusted during mode switching, then the device complexity is reduced, but the image quality deteriorates
Solution Approach 1:
The resistor module serves multiple functions: it acts as a standard current-limiting resistor during normal operation and simultaneously functions as a light intensity compensation mechanism when switching between 2D and 3D modes. This multi-functionality allows the system to maintain image quality without adding separate complex control circuits.
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 addresses light intensity deficiency by providing higher light intensity during 3D mode, enhancing image quality and preventing the 3D image from appearing darker, while also preventing blurring by providing light only during blanking times.
Implementation Method 1
The inverter receives and converts an input voltage into a first cross-voltage and further transmits the cross-voltage to the light emitter unit
Implementation Method 2
The light emitter unit includes a number of cold cathode fluorescent lamps (CCFLs)
Implementation Method 3
The light emitter unit includes a number of light emitting diodes (LEDs)
Data Source
AI summary
A flat display used for displaying a 2D image and a 3D image is provided. The flat display includes a panel and a backlight module. The backlight module provides a light to the panel. When the flat display displays the 2D image, the backlight module provides a first light intensity to the panel. When the flat display displays the 3D image, the backlight module provides a second light intensity to the panel. The second light intensity is higher than the first light intensity.