Unity Opto Technology Co., Ltd.

Other

Wistron Corporation

Wei Chang

Chih-Hsien Wu

Kai-Cheng Chuang

Huan-Ying Lu

Shao-Wei Chiu

Shih-Chao Shen

Yi-Shu Chen

Ching-Huei Wu

Sen-Yuh Tsai

Hsin-Chieh Liao

Che-Hao Kuo

Cheng-Han Hung

Hsien-yeh Hung

Ching-Ping Tseng

Kuo-Tien Cheng

Sheng-Wei Chen

Jia-Hao Siao

Szu-Chien Chen

A high-voltage linear drive and memory dimming LED lighting device is disclosed. The lighting device includes a high voltage linear constant current circuit, a control IC, a first LED string and a second LED string. The control IC is electrically connected to the high voltage linear constant current circuit, and the control IC is directly driven by receiving high voltage signals. Wherein, the control IC includes a voltage regulator module, a switching module and a memory module. The voltage regulator module is electrically connected to the high voltage linear constant current circuit; the switching module is electrically connected to the voltage regulator module and includes at least two electronic switches; and the memory module is electrically connected to the switching module.

High-voltage linear drive and memory dimming LED lighting device

Disclosed are a light-emitting device for digital control of color temperature modulation and its application. The light-emitting device is electrically connected to a wall switch and includes a DIP switch, first LEDs, second LEDs and a control module. The control module is electrically connected to the above components and contains a truth table. The truth table includes at least a first mode, second mode, third mode and a memory and automatically switch mode, and a digital switching is accomplished by correlating the DIP switch to the truth table. In the memory and automatically switch mode, the first to third mode color temperatures are sequentially switched and controlled by turning on or off the wall switch according to the truth table information. The light-emitting device may be applied to light fixtures or mirror products to improve the convenience of use.

Light-emitting device with digital control of color temperature modulation and application thereof

The present disclosure provides a screen shielding method, applied to a display device of an electronic device, wherein the display device has a display region, and the electronic device is arranged to execute a plurality of applications. The screen shielding method includes determining whether a first predetermined input signal has been received when a first application of the plurality of applications has been executed in the foreground, and producing a privacy block in response to the first predetermined input signal for entering a privacy protect mode.

Method, electronic device and computer program product for screen shield

Disclosed are an LED light emitting device and its manufacturing method. A blue LED chip specification is selected, a green phosphor and the blue LED chip are used to determine a green light frame on the CIE1931 chromaticity coordinates and a red phosphor together with a blue LED chip are used to determine a red light frame on the CIE1931 chromaticity coordinates, and a predetermined straight line passing through the color temperature target frame is selected, and both end points of the predetermined straight line fall within the green light frame and the red light frame, so as to determine the concentration of the green phosphor and the red phosphor, and the green and red phosphors and a blue LED chip are packaged to form a first LED and a second LED, and at least one first LED and at least one second LED are installed on a substrate.

Manufacturing method of LED light emitting device

A lighting device includes a lighting module, a storage module storing light data sets corresponding respectively to successive time points of a cycling period, and a processing unit. In a routine mode, the processing unit controls the lighting module to emit light and to successively change color of light at the successive time points of the cycling period. In an adjustment mode, the processing unit reads from the storage device one light data set corresponding to the time point indicated by a time signal from an input device, adjusts the light data set according to a color signal from the input device, and controls the lighting module to emit light based on the adjusted light data set.

Lighting system

LED bulb lamp cover

A secondary-side bucking and current-stabilizing flyback power converter adopts a dual-stage isolated circuit architecture and outputs a constant output current to drive a low-power LED module, and its primary stage adopts a flyback circuit architecture with a primary regulated voltage, and its secondary stage adopts of a buck circuit architecture of the current stabilizer, so that after the primary stage converts the constant voltage, the current stabilizer senses the load effect of the output current at the LED module to regulate the output cycle and maintain the total output of the output current constant and reduce the ripple amplitude, so as to achieve a non-strobe output result and improve the illumination effect of the LED module.

Secondary-side bucking and current-stabilizing flyback power converter

An auto-sensing dimming lamp guides ambient light to a sensor installed in a lamp cover and at a base through a light pipe. The auto-sensing dimming lamp automatically adjusts a light emission status of LED light sources according to the ambient light by a processor installed at the base. The processor includes a pass filter unit and a modulation unit, and the pass filter unit receives a detected signal waveform of the sensor and a driving voltage waveform of the LED light sources.

Auto-sensing dimming lamp

A self-excited TRIAC dimming circuit applied in a panel light includes a dimming module and at least one conversion module, and a power factor controller (PFC) is installed in the dimming module, and the conversion module is a self-excited electronic isolation transformer, and the TRIAC PFC is integrated with the circuit structure of a self-excited electronic transformer to improve the overall circuit stability, so that the panel light complies with a high safety standard to enhance product applicability and competitiveness.

Self-excited TRIAC dimming circuit

Disclosed is a purely resistive dimming circuit for driving LEDs to emit light and support an LED dimming function. The LEDs are divided into a first string and a second string connected in series with each other. The purely resistive dimming circuit is respectively and electrically coupled to an anode terminal of the first string and an anode terminal of the second string by a driving resistor and a current limiting resistor which are connected in series with each other. The resistance of the driving resistor restricts the LEDs to emit light at different stages to enhance the working efficiency of circuits, while using the property of the current limiting resistor to limit the overvoltage current, so as to achieve a constant power operating effect.

Purely resistive dimming circuit

An LED lead frame mounted on a platform of a lightbulb includes a metal polarity substrate, a metal retaining substrate and a casing for partially covering the metal polarity substrate and the metal retaining substrate. The metal retaining substrate is a sheet bent into a disposing portion and a carrying portion, and an included angle &#x3b8;is defined between the portions, and an abutting surface of the disposing portion abuts the platform, and a portion of the carrying portion not covered by the casing is provided for installing at least one LED chip. The metal polarity substrate is bent to form an included angle &#x3b8;, and &#x3b8;=&#x3b8;, and 93&#xb0;&#x2266;&#x3b8;&#x2266;130&#xb0;. The casing has a support member formed on the casing and protruded in a direction opposite to the direction of bending the metal retaining substrate. The LED lead frame enhances the illumination angle and light uniformity of the lightbulb.

LED lead frame and lamp thereof

An intelligent wireless doorbell alarm system driven and set by a wireless communication protocol includes at least one doorbell switch, plural lamps and an electronic device. The doorbell switch has a wireless signal module for generating a startup signal after the being triggered. The lamps are electrically coupled to one another. Each lamp has a wireless transmission module and a driving module and is electrically coupled to the doorbell switch for receiving the startup signal. The electronic device is electrically coupled to the lamps and has a setup module for setting the lamps.

Intelligent wireless doorbell alarm system

An LED driver circuit for supplying a TRIAC holding current by using a controllable current source has a single-stage power factor correction circuit architecture, and the circuit receives an input voltage received by a conversion module of the controllable current source to form an operating current for driving an LED light source to emit light and monitoring the change of the input voltage by a control chip, and adopts a switching method of a fixed cut-off time of a switch unit, so that the controllable current source outputs a constant operating current in a standard peak value to achieve the constant current status during the operation of the LED light source while assuring the operating current is always greater than a holding current required by the TRIAC element when the TRIAC element is conducted.

LED driver circuit for supplying TRIAC holding current by using controllable current source

A driver circuit adopting a primary side regulating architecture and an isolation transformer for improving LED flickers includes a transformer, a primary side regulating module, a feedback portion, a driving module and a dimming portion. The transformer includes an input coil, an auxiliary coil, a driving coil, and a dimming coil. The primary side regulating module is electrically coupled to the input coil; the feedback portion is electrically coupled to the auxiliary coil and the primary side regulating module; the driving module is electrically coupled to the driving coil; the dimming portion is electrically coupled to the dimming coil and the driving module. When a dimming signal inputted to the dimming portion has a voltage of 1V-10V, and the driver circuit is applied to a panel light, the LED flicker is improved effectively.

Driver circuit for improving LED flickers

An LED driving device with open circuit protection and color temperature and brightness adjustment is applied in a lamp to drive LEDs which are divided into strings, and at least one string is formed by connecting blue light diodes in series, and the remaining strings are formed by connecting yellow light LEDs in series, and at least one of the yellow light strings is connected to the blue light string in parallel and then connected to the remaining strings in series to form a node. The LED driving device employs a switch to conduct the blue or yellow light string to change the color temperature of the emitted light of the lamp, and a power input pin of a control chip is electrically coupled to the node. If there is an open circuit caused by an abnormality of the LEDs, the operation will be stopped to provide protection.

Growing community of inventors

Taipei, Taiwan

Wei Chang