Light Beam Control in Micro-LEDs

MicroLED pixel configuration and display panel design to avoid dispersion and color inconsistency problems in small angle microLED displays. Multiple microLEDs of different colors are arranged on a circular arc with a common center point. The microLEDs emit light towards an optical component that collects and emits the light at a preset angle. The microLEDs are positioned so their light beams coincide after rotating around the center point. This ensures the emitted light from all microLEDs enters and exits the optical component at the same angle, preventing dispersion and color variation when using optical components to narrow the viewing angle.

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Switchable directional lighting device for displays that can independently control the directionality of light output from LED arrays. The device has two sets of micro-LEDs, one with catadioptric optical elements aligned to provide a narrow directional light output, and another set without alignment for wider output. A control circuit drives the micro-LED sets independently. This allows switching between a narrow, concentrated light distribution and a wider, more uniform distribution. The catadioptric optical elements have smaller input widths than output widths, converging light to narrow angles.

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Semiconductor-based waveguides are used as secondary optics for micro-LEDs to decrease beam divergence and collimate light for better control and efficiency. The waveguides are designed to decrease the divergence of the emitted light for applications like displays that require collimated light.

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Adjustable beam width LED lighting device with controllable beam widths. The device has an array of LEDs around a central point, an optical element, and a driver. The driver can selectively drive LEDs with different power levels to emit beams with different widths. By driving a subset of central LEDs with full power for a narrow beam, and a larger subset with reduced power for a wider beam, it avoids the dark ring artifact. The driver dynamically adjusts power for different LED selections to maintain consistent flux.

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Micro-LEDs are designed to improve the collimation of emitted light while maintaining satisfactory extraction efficiency. The design involves using a truncated near-parabolic mesa with a low aspect ratio, an offset light-emitting source, and a polished primary emission surface. This allows the internal reflection of angled rays to enhance collimation.

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Micro-LEDs with improved collimation of light output on the microscale. The micro-LEDs have a parabolic mesa structure with a low aspect ratio and a polished reflective surface. The parabolic shape and polished surface allow the collimation of light emitted from the LED to be improved compared to conventional LEDs.

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A micro-LED design with photonic crystal columns extending through the transparent semiconductor layer enhances the directionality of emitted light. The photonic crystal columns inhibit light propagation in certain directions and act as waveguides to reduce light divergence. This improves extraction efficiency and reduces absorption and overheating in the micro-LED.

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LED headlight with adaptive beam pattern by using an array of individually controllable LEDs. The LEDs are arranged in a planar area with a center of highest brightness. The LEDs are divided into control units where each unit can have multiple LEDs connected in series. The control units can be composite units where LEDs further away from the center have larger emitting areas. This allows individually controlling the brightness of each control unit and LED to shape the beam pattern adaptively based on environment conditions.

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Micro-LED devices are designed to improve light output collimation without sacrificing significant extraction efficiency. The micro-LED structure includes a low aspect ratio parabolic mesa, offset light emitting source, and polished emission surface to reflect and collimate internal rays.

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Micro-LED (μLED) devices with improved collimation of light output. The μLEDs have a near parabolic mesa structure with a low aspect ratio, a polished primary emission surface, and an offset light emitting source. These features allow parasitic rays to be reflected back into the device, improving collimation. The offset source and polished surface enhance this effect.

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LED lighting device with selective control over color temperature, beam spread, and beam shape. The device has an array of LED sets, each with multiple sections divided by insulators. Current can be independently applied to each section. This allows separately controlling color, beam spread, and shape by activating different sections. The device can emit light with customized properties like tunable white, adjustable beam width, and variable beam shape by selectively driving the LED sections.

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A lighting device with adjustable light distribution angle using a voltage-controlled transparency module. The device has a light emitting module with an LED, a transparency module in front of it, and a power supply. The transparency module's opacity can be adjusted by voltage to change the light angle. This allows customizing the beam spread without needing specific shaped reflectors or diffusers.

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