Light Beam Control in Micro-LEDs

An LED lighting module that allows adjustment of light output in both vertical and horizontal directions for better illumination control. The module has an array of LED lamp beads that can be tilted independently. This allows the vertical orientation of the LED beads to be adjusted separately from the horizontal orientation. This allows the brightness of light emitted in both vertical and horizontal directions to be adjusted independently, providing more flexible and customizable lighting.

Source

Lighting system with adjustable light direction and distribution from a single fixture. The system allows a central device to transmit control information to a lighting fixture to change the emitted light direction and distribution angle. This allows the fixture to provide different lighting types without needing multiple fixtures. The central device acquires the control information and instructs the fixture to adjust the light emission accordingly.

Source

Light source device for exposure equipment like lithography machines used in semiconductor and display manufacturing. The device has an LED array with multiple chips and a control unit that adjusts the output of some chips to change the combined light intensity distribution. This allows optimizing the light distribution in the pupil plane for better imaging performance compared to uniform LED arrays. The control unit can compensate for non-uniformities in the LED array's intensity distribution to create a more uniform and symmetric pupil light intensity.

Source

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.

Source

Micro-LED structure for augmented reality and virtual reality displays that have improved light patterns. The micro-LED structure includes micro-LED chips with optical structures like lenses and reflective cups over each chip. The optical structures shape and direct the light emitted from the micro-LEDs for better performance in AR/VR displays.

Source

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.

Source

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.

Source

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.

Source

Adjustable direction lighting apparatus with a movable internal housing that can slide along a track within an external housing to change the direction of the light output. The light source module is attached to the internal housing that can slide along a track inside an external housing. This allows adjustment of the light direction without moving the entire fixture. The internal housing can also rotate on a hinge connection to the external housing. A camera module and optical sensor can be attached to the internal housing for applications like security lighting.

Source

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.

Source

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.

Source

LED lamp with adjustable beam angle and direction without sacrificing optical efficiency or adding driver complexity. The lamp has a central LED group and surrounding peripheral LED groups. An overlying collimator lens. By independently driving the central and peripheral LED groups, the beam angle and direction can be controlled. This provides electronic steering without impacting optical efficacy compared to a fixed beam lamp.

Source

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.

Source

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.

Source

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.

Source

LED night light with multiple directional illumination from a single fixture. The light has more than one opening, lens, or window to emit light beams in multiple directions instead of just one. This provides near-field illumination from multiple locations. The light also has adjustable angles for some of the openings to further customize the beam patterns. This allows a single LED light to illuminate multiple nearby areas instead of just one. The adjustable angles provide flexibility in the beam directions.

Source

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.

Source

A lighting device with electronically controllable light distribution using separate groups of LEDs with different emission characteristics. The device has at least two groups of LEDs driven independently by separate circuits. By selectively turning on/off the groups, different light distributions can be achieved. The LEDs in each group can have the same or different emission characteristics. This allows customization of the light pattern without mechanical reflector adjustment or multiple sources. The separate circuits enable independent control of each group.

Source

LED tube light with adjustable light distribution and intensity. The tube has an LED element, a light-reflecting member on the LED side, and a total light-transmitting plate. The reflecting member is asymmetrically positioned relative to the LED center. It has a light-collecting and reflecting surface. The reflecting member can have slits, pores, or transparency. It allows customizing the light distribution by varying the angle, length, or transmittance of the reflector. This provides different intensity levels as the angle changes. The reflector can also have curved or uneven sides. This confines the light to the tube and irradiates more through the total plate. The reflector can be connected and extended along the tube width. The reflector angle, position, and shape adjust the light direction.

Source

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.

Source