Young Lighting Technology Corporation

Epistar Corporation

Industrial Technology Research Institute

Jung-Min Hwang

Ta-Cheng Hsu

Sheng-Hung Lin

Min-Hsun Hsieh

Chien-Fu Shen

Tsun-Kai Ko

De-Shan Kuo

Schang-Jing Hon

Ting-Chia Ko

Ya-Lan Yang

Chien-Kai Chung

Shih-Yuan Yu

Udo Custodis

Chih-Ming Hu

Che-Min Kung

Chia-Hao Chang

Wei-Chih Wang

Tse-Hsu Wu

Wei-Ming Chen

Chih-Hua Lin

Yu-Chin Lan

Chi-Chun Huang

Ching-Yuan Chung

Shun-Yi Yang

Chia-Hung Wei

Chi-Yun Cheng

Min-Hsun Liu

Ya Lan Yang

A dimming control method and circuit thereof are provided. After receiving a TRIAC signal with at least one positive/negative half cycle waveforms, the turning points of the positive/negative half cycles are detected to obtain the conduction angles of the positive/negative half cycle waveforms. Then, a pulse width modulated signal with the symmetrical positive and negative half cycle waveforms is rebuilt to control a lamp. Therefore, the disclosure can solve the flickering issue of the lamp.

Dimming control method and circuit thereof

The present disclosure relates to a switch circuit. The switch circuit comprises: a plurality of storing elements and a plurality of switch elements. The plurality of switch elements coupled the plurality of storing elements for generating a step-down mode. Moreover, the switch elements, controllers and parts of resistors in the present disclosure are integrated in an integrated circuit so as to effectively reduce size and weight of the driving circuit, advance the circuit suitability, and decrease the development cost of the circuit.

Switch circuit

A method of manufacturing a light-emitting device comprising the steps of cutting a substrate by a laser beam to form a cavity in the substrate and generate a by-product directly on the substrate by the cutting, and removing the by-product by a chemical solution containing an acid under a predetermined cleaning temperature.

Method for manufacturing high efficiency light-emitting diodes

A light emitting diode (LED) lamp includes a heat dissipation module, a circular light guide plate (LGP), and LED light sources. The heat dissipation module includes a heat dissipation element and a heat-conducting base that has a containing concave. The heat dissipation element connecting and surrounding the heat-conducting base is distant from the circumference of the heat-conducting base. The circular LGP in the containing concave has a top surface, a bottom surface, and an annular side surface. The top surface faces the heat-conducting base and has concentric annular trenches. The LED light sources are configured in the containing concave and face the annular side surface. The LED light sources are suitable for emitting a light beam which is capable of passing through the annular side surface to enter the circular LGP and capable of being reflected by the annular trenches and emitted from the bottom surface.

Light emitting diode lamp having heat dissipation module

An illuminating module includes at least one light-emitting chip, a phosphor, and a color temperature conversion media. The light-emitting chip is capable of emitting wavelength light, and the phosphor is disposed in a propagation path of the wavelength light to transform the wavelength light into a first white light with a first color temperature. The color temperature conversion media is disposed in a propagation path of the first white light to transform the first white light into a second white light with a second color temperature. The second color temperature is smaller than the first color temperature.

Illumination module

A light guide plate (LGP) includes a first surface, a second surface, and a plurality of light incident surfaces. The first surface is a light-emitting surface. The light incident surfaces connect the first surface and the second surface. The second surface has a plurality of ring-shaped grooves. Depths of the ring-shaped grooves are gradually decreased from a place close to a center of the LGP towards places close to the light incident surfaces. Each of the ring-shaped grooves has a first ring-shaped side wall surface and a second ring-shaped side wall surface. The second ring-shaped side wall surface is opposite to the first ring-shaped side wall surface and located between a geometry center of the ring-shaped groove and the first ring-shaped side wall surface. The first ring-shaped side wall surface is a tilted surface. In addition, a light source apparatus is also provided.

Light guide plate and light source apparatus

A light source module includes a transparent element, a plurality of light-emitting devices, and a plurality of light diffusion micro-structures. The transparent element includes a transparent substrate having a light exiting surface and a bottom surface opposite to the light exiting surface, a plurality of first notches, and a plurality of second notches. The first notches are sunken at the light exiting surface. There is a reflection surface in each of the first notches. The second notches are respectively opposite to the first notches and sunken at the bottom surface. The second notches respectively have a light incident curve-surface. The light-emitting devices are respectively disposed beside the light incident curve-surfaces. Each of the light-emitting devices has a light exiting surface capable of providing a light beam. The light exiting surface is not conformal to the light incident curve-surface. The light diffusion micro-structures are disposed on the bottom surface.

Light source module and illumination apparatus

A method for manufacturing a light-emitting device comprising the steps of: providing a substrate comprising a first surface and a second surface; forming a plurality of cutting lines on the substrate by a laser beam; cleaning the substrate by a chemical solution; and forming a light-emitting stack on an first surface of the substrate after cleaning the substrate.

A light guide unit including a light guide plate and a scattering reflective unit is provided. The light guide plate has a first surface, a second surface opposite to the first surface, and a light incident surface connecting the first surface and the second surface. The light incident surface includes a first recess and a second recess arranged in a sequence from the first surface to the second surface. An average radius of curvature of the first recess is less than an average radius of curvature of the second recess. The scattering reflective unit is disposed on the second surface. A light source module is also provided.

Light guide unit and light source module having scattering reflective unit

A lighting device includes a light guide body and at least one light-emitting unit. The light guide body has a light guide channel and a local roughened surface on the light guide channel as a scattering region. The at least one light-emitting unit is capable of emitting a light into the light guide channel, wherein at least one portion of the light is guided to the scattering region, and the scattering region scatters the light as a local light source region.

Lighting device

A light source apparatus including a light guide plate, a first light emitting unit, and a second light emitting unit is provided. The light guide plate has a first surface, an opposite second surface, a first side surface, and an opposite second side surface. The first light emitting unit is disposed beside the first side surface for providing a first light beam. The second light emitting unit is disposed beside the second side surface for providing a second light beam. The first light emitting unit has a central line passing through a geometric center of the first light emitting unit and being perpendicular to the first side surface. The second light emitting unit has a central line passing through a geometric center of the second light emitting unit and being perpendicular to the second side surface. The central lines do not coincide with each other.

Light source apparatus with a light guide plate having a lighting units disposed adjacent to two opposing sides offset with each other

An illumination system including a master control unit, a device unit, a driving circuit unit, and an illumination unit is provided. The master control unit receives an input signal and outputs a control signal by performing a program operation processing to the input signal. The device unit analyzes the control signal so as to obtain a color temperature setting value and a brightness setting value, and generates two output signals according to the brightness setting value and two color temperature adjusting signals determined by the color temperature setting value. The illumination unit has at least two lamps with different color temperatures. The driving circuit unit receives and converts the two output signals so as to proportionally output two driving signals to respectively drive the two lamps. One of the two output signals is enabled after the other of the two output signals is disabled for a predetermined time.

Illumination system and illumination control method thereof

A method for manufacturing a light-emitting device comprising the steps of cutting a light-emitting unit by a laser beam, and cleaning the light-emitting unit by an acid solution to remove by-products resulted from the laser cutting.

Growing community of inventors

Hsinchu, Taiwan

Jung-Min Hwang