Micro-LED Angle-Control Projection for Large Screens in Compact Optics
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Solution Overview
Problem
Conventional optical projection systems using backlight sources result in large volume devices that fail to meet the demand for miniaturized yet large-screen display solutions.
Innovation Solution
An optical projection imaging system employing an LED display with an angle control structure that adjusts the emitting light direction of Micro-LED chips to project images at different angles, allowing for image splicing and large-screen display without increasing the device's volume, utilizing an image source controller, angle controller, and optical axis control apparatus to manage display modes and light modulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a backlight source is used to emit light through a liquid crystal modulation screen or MEMS reflector array, then the projection system can generate images, but the overall projection system becomes huge in volume
Solution Approach 1:
The patent extracts the backlight source from the projection system, replacing it with self-emissive LED display components. This removes the bulky backlight unit while retaining the core image generation function through direct light emission from LED chips, thereby significantly reducing system volume.
Solution Approach 2:
The patent replaces the mechanical/optical complex system of backlight sources, liquid crystal screens, and reflector arrays with a simplified LED-based direct emission system. This substitution eliminates multiple optical components and reduces the overall system volume while maintaining projection functionality.
2Volume of moving object
If the projection system volume is reduced for miniaturization, then the device becomes more compact, but the ability to project large-screen images is compromised
Solution Approach 1:
The patent uses angle control structures to modulate light in different angular dimensions. By controlling light emission at multiple angles and splicing images from different angles, the system projects large-screen images onto distant surfaces without requiring a large physical display area, thus achieving large-screen projection from a compact device.
Solution Approach 2:
The patent divides the projection screen into multiple regions that are illuminated from different angles. Multiple LED display components or regions are controlled to project different segments of the overall image, which are then spliced together on the projection screen to form a complete large-screen image.
3Area of stationary object
If multiple LED display components are used with angle control structures, then large-screen display is achieved through image splicing, but the device complexity increases
Solution Approach 1:
The angle control structure serves multiple functions: it controls the emission angle of light, enables image splicing, and facilitates large-screen projection. This multi-functionality reduces the need for separate components for each function, thereby managing device complexity while achieving large-screen display capability.
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
Enables miniaturization of the projection system while achieving large-screen display through image splicing, maintaining low costs and ease of implementation, and satisfying user requirements for large-screen visual enjoyment.
Implementation Method 1
an optical rotation material layer used for changing polarizability of the emitting main light
Implementation Method 2
a macromolecule liquid crystal layer used for refracting the incident emitting main light
Implementation Method 3
the macromolecule liquid crystal layer respectively has a first refractive index and a second refractive index for polarized light at different incident angles
Data Source
AI summary
The present disclosure discloses an optical projection imaging system and method. Through additionally installing an angle controller on a Light Emitting Diode (LED) chip, and through adjusting and controlling an emitting angle of light emitted by the LED chip every preset time period by the angle controller, different images projected in different emitting angles are obtained, and a whole image is spliced by the different images projected in the different emitting angles and projected to a projection screen. In addition, the present disclosure further discloses an optical projection imaging method.