Alternating Backlight Components for AR-VR Display Stability
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Solution Overview
Problem
Existing AR&VR display module backlight systems face challenges in achieving high brightness and stability without increasing the operating current of LED light bars, leading to lower working stability and the need for black frame insertion technology.
Innovation Solution
A backlight module comprising multiple backlight components that alternately emit light, with a retaining wall structure to prevent light overlap, and a control method to manage light emission, ensuring higher brightness and stability without increasing operating current.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the operating current of LED light bars is increased to achieve high brightness, then the brightness is improved, but the working stability deteriorates due to heat generation
Solution Approach 1:
The backlight module is divided into multiple independent backlight components (first backlight component, second backlight component, etc.) that can be controlled separately. Each component has its own light-emitting diode light bar and corresponding control circuit, allowing independent control of each segment to reduce overall heat generation while maintaining brightness
Solution Approach 2:
The backlight components are configured to emit light alternately in periodic cycles rather than continuously. The control method switches between different backlight components in sequence, with each component operating for a predetermined time period, thereby reducing the average current and heat generation while maintaining perceived brightness through persistence of vision
2Illumination intensity
If multiple backlight components emit light simultaneously to increase brightness, then the brightness is improved, but light overlap occurs causing display issues
Solution Approach 1:
The backlight module is segmented into multiple spatially separated backlight components with distinct light-emitting regions. Physical barriers and optical isolation structures are implemented between components to prevent light from one component from reaching areas intended for other components, eliminating light overlap while maintaining overall brightness through sequential operation
Solution Approach 2:
The control system activates only one backlight component at a time in periodic succession. The switching control ensures that when one component is emitting light, all other components are completely off, eliminating any possibility of light overlap while maintaining high brightness during each active period
3Reliability
If black frame insertion technology is used to improve stability, then the working stability is improved, but the productivity deteriorates due to reduced effective display time
Solution Approach 1:
The multiple backlight components are configured to operate in sequential succession with minimal or no idle time between activations. The control method ensures continuous light emission across the display by immediately switching to the next component when one completes its cycle, eliminating black frames and maintaining continuous useful display action while preserving stability through reduced duty cycle operation
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 enhances the brightness and stability of the backlight module, improving user experience by maintaining high brightness and reliability while avoiding the limitations of traditional systems.
Implementation Method 1
The backlight module comprises light-emitting diode (LED) light bars. The light rays emitted by the LED light bars can be incident to the liquid crystal display panel.
Implementation Method 2
The liquid crystal display panel modulates the light rays by liquid crystal deflection to realize image display.
Data Source
AI summary
A backlight module (0), a display module (1) and control method thereof, and a storage medium, in the field of display technology. The backlight module (0) includes m backlight components (01), wherein m is larger than or equal to 2 and is an integer, the m backlight components (01) are capable of emitting light alternately, and the light rays emitted by any two of the m backlight components (01) do not overlap. The present disclosure solves the problem that the backlight module (0) has lower working stability. The working stability of the backlight module (0) is favorably improved. The backlight module (0) is used for the display module (1).