Hsinchu, Taiwan
Hsinchu, Taiwan

Time filter

Source Type

In a method for driving a light-emitting diode (LED) device, a driving system is configured to: a) receive a number of driving signals, each corresponding to a period the LED device is to be activated; b) determine a number of repetitions for output of each of the driving signals; c) determine an average driving period for each of the driving signals; d) constructing a sequence list of driving signals to be sent to the LED device, the sequence list including a plurality of rows, each of the rows is numbered and includes two columns for containing respectively two entries of the driving signals therein; and e) sequentially transmit the two entries of the driving signals contained in each of the rows included in the sequence list to the LED device.


Patent
Macroblock Inc. and Harvatek Corporation | Date: 2015-03-27

A display structure includes a main body, a plurality of light-emitting diode units, and a plurality of light blocking walls. The main body includes a substrate, and a circuit unit disposed on the substrate. The light-emitting diode units are electrically connected to the circuit unit and illuminate outwardly. Each of the light blocking walls is disposed between two adjacent ones of the light-emitting diode units to prevent light interference between the two adjacent ones of the light-emitting diode units.


Patent
Macroblock Inc. | Date: 2014-11-05

A light emitting device (1) includes a processing unit (5), an adjusting unit (6), and first and second light emitting units (7, 8) that emit light in response to a current received thereby. The processing unit (5) receives a control signal and outputs an operation signal associated therewith. The adjusting unit (6) receives the operation signal and a reference input, and outputs adjusted currents to the light emitting units (7, 8) in response to the operation signal. A sum of magnitudes of the adjusted currents is associated with the reference input. Lights emitted by the first and second light emittingunits (7, 8) have different color temperatures.


A single wire signal regeneration transmitting apparatus receives a serial packet including a plurality of signal segments, and each of the signal segments includes a data field and a stuff time symbol. Each of the data fields, which is followed by each of the stuff time symbols, includes multiple logic 0/1 signal symbols, with accumulated numbers of the logic 0/1 signal symbols in each of the data fields being the same. The single wire signal regeneration transmitting apparatus is adapted to process the serial packet to sequentially output the signal segments, and after the single wire signal regeneration transmitting apparatus outputs the data field from a previously received signal segment, the single wire signal regeneration transmitting apparatus continues outputting the stuff time symbol until starting to process a next received signal segment received subsequent to a currently received signal segment in the received serial package.


A driving system for a light emitting device includes a data latch unit to store first logic data, a shift register unit to store second logic data, a multiplexer unit to selectively output the first and second logic data, and a driving unit converting the logic data outputted by the multiplexer unit into a driving output that is provided to the light emitting device.


Patent
Macroblock Inc. | Date: 2014-02-19

A light-emitting diode (LED) driving circuit includes a power factor correction (PFC) circuit and a driving controller. The PFC circuit controls a power factor of the LED driving circuit. The LED driving circuit includes an inductor, a switch, a current detection circuit, and a time detection circuit. The inductor senses an inductor current and provide energy to at least one LED. The switch connected to the inductor is conducted according to a driving signal. The current detection circuit connected to the switch detects inductor current information. The time detection circuit connected to the switch detects an energy discharging time during which the inductor current decrease from a peak value to zero. The driving controller connected to the switch, the current detection circuit, and the time detection circuit outputs the driving signal to the switch according to the voltage level and the energy discharging time.


Patent
Macroblock Inc. | Date: 2014-02-12

A LED driving device adapted to driving N LED strings connected in series is provided. N is a positive integer greater than 1. The LED driving device includes (N-1) switch units, a current source, a detection unit and a control unit. The ith switch unit electrically connects to the (i+1) LED string in parallel or to the ith LED string in parallel, and 0 < i (N-1). The current source supplies a driving current to drive the N LED strings. The detection unit outputs a detection signal according to a voltage of the current source, a first reference voltage and a second reference voltage. The control unit outputs a plurality of first control signals according to the detection signal to dynamically control an amount of the (N-1) switch units turned on.


Patent
Macroblock Inc. | Date: 2013-01-09

An auto-selecting holding current circuit is applicable to a converter. A primary side of the converter has a Triode for Alternating Current (TRIAC) and a bleeder circuit. The auto-selecting holding current circuit includes a first sensor module, a second sensor module and a reference voltage selecting circuit. The first sensor module detects an input current drop time or an input voltage drop time to output a sense signal. The second sensor module receives a current detector signal and outputs a critical current signal to detect a holding-current value range of the TRIAC. The reference voltage selecting circuit outputs a reference current signal to the bleeder circuit, and the reference current signal corresponds to a holding-current value of the TRIAC. Therefore, the bleeder circuit maintains normal operation of the TRIACs with different holding-current values.


A driving system for a light emitting device includes a data latch unit (5) to store first logic data, a shift register unit (3) to store second logic data, a multiplexer unit (6) to selectively output the first and second logic data, and a driving unit (7) converting the logic data outputted by the multiplexer unit (6) into a driving output that is provided to the light emitting device.


Patent
Macroblock Inc. | Date: 2014-01-01

A common-core power factor correction resonant converter includes an energy-transforming circuit. The energy-transforming circuit receives an input line voltage and generates an output power. The energy-transforming circuit includes a coupling inductor and a charge-storage capacitor. The coupling inductor and the charge-storage capacitor are charged by the input line voltage in response to a control signal, so as to generate a charge-storage capacitor voltage. When the charge-storage capacitor voltage is charged to a preset voltage level, the coupling inductor and the charge-storage capacitor are discharged according to the control signal. Then, the energy in the coupling inductor and the charge-storage capacitor is transformed to the output load and provide the output voltage or current regulation.

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