Patent application number | Description | Published |
20090145632 | FLEXIBLE PRINTED CIRCUIT AND METHOD FOR MANUFACTURING THE SAME - Disclosed is a flexible printed circuit, comprising a substrate, and a silver foil and a reinforcement plate attached on said substrate in order, wherein there is an ink layer between said silver foil and said reinforcement plate. According to the invention, by printing the ink onto the silver foil and then attaching the reinforcement plate, especially printing the ink in the form of a dot, strip or mesh, the total thickness of the flexible printed circuit will not increase while the surface roughness of the silver foil increases, resulting in increase of adhesion of the reinforcement plate. This strengthens the attachment between the reinforcement plate and the silver foil, meeting the requirement of peeling-resistant strength between the reinforcement plate and the silver foil. | 06-11-2009 |
20140082387 | Method and Apparatus for Controlling Central Processing Unit - A method for controlling a central processing unit (CPU), where the method includes: acquiring a usage rate and an operating frequency of one CPU of operating CPUs; if the operating frequency of the one CPU is smaller than a core off-line frequency, multiplying the usage rate of the one CPU by a first weight to obtain a CPU power consumption sensitive factor corresponding to the one CPU; if the operating frequency of the one CPU is greater than or equal to the core off-line frequency, multiplying the usage rate of the one CPU by a second weight to obtain a CPU power consumption sensitive factor corresponding to the one CPU; and turning off at least one operating CPU if the mean is smaller than a CPU turn-off power consumption sensitive factor threshold. | 03-20-2014 |
20140139419 | BACKLIGHT DRIVING CIRCUIT, BACKLIGHT MODULE, AND LCD DEVICE - A backlight driving circuit includes a power supply module, an inductor connected with an output end of the power supply module, and a light emitting diode (LED) lightbar connected with the inductor in series. A monitoring module detecting an output current of the inductor is coupled between the inductor and the LED lightbar. A controllable switch is connected between an output end of the inductor and a grounding terminal of the backlight driving circuit. The monitoring module is coupled with the controllable switch. When the output current of the inductor is lower than a preset value, the monitoring module controls the controllable switch to turn on. | 05-22-2014 |
20140152186 | LED BACKLIGHT DRIVING CIRCUIT, BACKLIGHT MODULE, AND LCD DEVICE - A light emitting diode (LED) backlight driving circuit includes a light bar and a power supply module that is coupled with the light bar. The light bar and the power supply module are connected by a flexible circuit board. The light bar is also connected with a measuring resistor in series. A test point is arranged at two ends of the measuring resistor. | 06-05-2014 |
20140152535 | LED BACKLIGHT DRIVER CIRCUIT, LCD DEVICE AND DRIVING METHOD - A light emitting diode (LED) backlight driver circuit includes at least two lightbars which are independently driven, an output end of each lightbar is coupled with a constant current driver integrated circuit (IC), and a monitoring module controlling the constant current driver IC. The monitoring module outputs a phase delay time to drive each lightbar and a current duty of each lightbar to the constant current driver IC, and the constant current driver IC drives the lightbars one by one according to the corresponding current duty in accordance with the phase delay time in sequence. | 06-05-2014 |
20140252984 | LED BACKLIGHT DRIVING CIRCUIT, LCD DEVICE, AND DRIVING CIRCUIT - The present disclosure provides a light emitting diode (LED) backlight driving circuit, a liquid crystal display (LCD) device, and a driving circuit. The LED backlight driving circuit includes a timing control module, an LED lightbar, and a driver module coupled with an output end of the LED lightbar. The driver module includes at least one constant current driver chip driving the LED lightbar to display. The timing control module successively outputs a driving signal to the constant current driver chip. The driving signal includes data units which are arranged in sequence, and each data unit storing a current duty and a phase delay of one LED lightbar. The constant current driver chip directly reads data of a corresponding data unit and drives the LED lightbar to display. | 09-11-2014 |
20140253842 | Driver for LED Backlight and LED Backlight Module and Liquid Crystal Display - LED backlight driver, LED backlight module, and liquid crystal display are disclosed. The LED backlight driver comprises DC voltage input end, boost circuit, LED string, and constant current driver. The DC voltage input end is used for inputting a DC voltage. The boost circuit is used for boosting the DC voltage input from the DC voltage input end and outputting a boosted DC voltage. The LED string comprises a plurality of LEDs connected in series and a first resistor. The LED string receives the boosted DC voltage from the boost circuit. A sum of forward voltages of all of the LEDs in the LED string is less than or equal to the boosted DC voltage output from the boost circuit. The constant current driver is used for outputting a level signal to the boost circuit based on a voltage across the first resistor and a voltage for a triangular signal. | 09-11-2014 |
20140253846 | LIQUID CRYSTAL DISPLAY, LED BACKLIGHT SOURCE, AND THE DRIVING METHOD THEREOF - A liquid crystal display, a LED backlight source and the driving method thereof are disclosed. The LED backlight source includes a DC voltage input for inputting DC voltage, a boost circuit for increasing the voltage of the DC input and outputting the boosted DC voltage, a LED strip and a constant current driving circuit. The LED strip includes a plurality of serially connected LEDs and a first resistor (R | 09-11-2014 |
20140265925 | LED BACKLIGHT DRIVING CIRCUIT, LCD DEVICE, AND METHOD FOR DRIVING THE LED BACKLIGHT DRVING CIRCUIT - The present disclosure provides a light emitting diode (LED) backlight driving circuit, a liquid crystal display (LCD) device, and a method for driving the LED backlight driving circuit. The LED backlight driving circuit includes an odd number of LED lightbars and a constant current driver chip including an even number of channels. The channels include a work channel connected to the LED lightbar, and a dangling channel that is not connected to the LED lightbar. The dangling channel is connected to a reference signal, and a voltage of the reference signal is more than an internal comparison voltage of the constant current driver chip. | 09-18-2014 |
20140292824 | BACKLIGHT DRIVING CIRCUIT, LCD DEVICE, AND METHOD FOR DRIVING THE BACKLIGHT DRIVING CIRCUIT - A backlight driving circuit includes a transformer, a controllable switch connected in series with a primary side of the transformer, a voltage collection unit receiving a voltage of the primary side of the transformer, and a comparing unit coupled to the voltage collection unit. When an output voltage of the voltage collection unit is less than a preset reference voltage, the comparing unit drives the controllable switch to turn on. | 10-02-2014 |
20140333520 | LED BACKLIGHT DRIVING CIRCUIT, BACKLIGHT UNIT, AND LCD DEVICE - A light emitting diode (LED) backlight driving circuit includes a power supply, an LED light bar coupled to the power supply, a constant current driving chip that drives the LED light bar to light, and a comparing unit. The constant current driving chip includes an under-voltage protection pin that receives an under-voltage protection signal. An overvoltage collecting unit of the LED backlight driving circuit and an under-voltage collecting unit of the LED backlight driving circuit are coupled to an input end of the power supply, and an output voltage of the under-voltage collecting unit is directly input to the under-voltage protection pin. A reference voltage is input to a first input end of the comparing unit, and a second input end of the comparing unit is coupled to the overvoltage collecting unit. When an output voltage of the overvoltage collecting unit exceeds the reference voltage, the comparing unit sends the under-voltage protection signal to the under-voltage protection pin. | 11-13-2014 |
20140340000 | BACKLIGHT DRIVING CIRCUIT, LCD DEVICE, AND METHOD FOR DRIVING THE BACKLIGHT DRIVING CIRCUIT - A backlight driving circuit includes a constant current driving chip, a power module, and a light emitting diode (LED) lightbar coupled with the power module. The constant current driving chip includes a control module that controls switching frequency of the power module, and an adjusting module that adjusts duty cycle of effective current flowing through the LED lightbar. The control module includes a frequency pin used to set the switching frequency of the power module. An external pulse-width modulation (PWM) dimming signal is sent to the adjusting module of the constant current driving chip. The backlight driving circuit further includes a detection module that detects duty cycle of the PWM dimming signal, and a monitor module coupled with the detection module of the backlight driving circuit. | 11-20-2014 |
20140340295 | LED BACKLIGHT DRIVING CIRCUIT, LCD DEVICE, AND METHOD FOR DRIVING THE LED BACKLIGHT DRIVING CIRCUIT - A light emitting diode (LED) backlight driving circuit includes a power supply, an LED light bar, and a constant current driving chip that adjusts brightness of the LED light bar. The constant current driving chip receives the PWM dimming signal. N boost units are connected in series between the power supply and the LED light bar, and the N boost units are connected in parallel with each other. Comparing units are correspondingly coupled to control ends of one or more of (N−1) boost units. When a duty ratio of the PWM dimming signal is less than a preset threshold, the comparing unit drives a corresponding boost unit to turn off. N is an integer greater than or equal to 2. | 11-20-2014 |
20140340296 | LED BACKLIGHT DRIVING CIRCUIT, BACKLIGHT MODULE, AND LCD DEVICE - A light emitting diode (LED) backlight driving circuit includes a rectifier module, a voltage reduction module coupled to the rectifier module, and an LED lightbar coupled to the voltage reduction module. A city voltage is inputted to the rectifier module, and a pulse-width modulation (PWM) controls the voltage reduction module. | 11-20-2014 |
20140354180 | BACKLIGHT DRIVING CIRCUIT, LCD DEVICE, AND METHOD FOR DRIVING THE BACKLIGHT DRIVING CIRCUIT - A backlight driving circuit includes a light emitting diode (LED) lightbar, a power supply driving the LED lightbar, a constant current driving chip controlling the power supply and the LED lightbar, and a control unit monitoring a voltage of a cathode of the LED lightbar. The constant current driving chip includes a main control unit that drives the power supply, and an adjusting unit that adjusts brightness of the LED lightbar. An input end of the adjusting unit is coupled to the cathode of the LED lightbar, and an output end of the adjusting unit is coupled to a load unit, a resistance value of the load unit may be adjusted. When the voltage of the cathode of the LED lightbar is greater than or equal to a preset threshold, the control unit controls the load unit to reduce the resistance value of the load unit. | 12-04-2014 |
20140354181 | LED BACKLIGHT DRIVING CIRCUIT, LCD DEVICE, AND METHOD FOR DRIVING THE LED BACKLIGHT DRIVING CIRCUIT - A light emitting diode (LED) backlight driving circuit includes an LED light bar, a power supply that drives the LED light bar, and a control assembly that controls the LED light bar and the power supply. The control assembly is configured with a monitor that reduces brightness of the LED light bar when a display image of a liquid crystal (LC) panel is switched between a two-dimensional (2D) display mode of the LC panel and a three-dimensional (3D) display mode of the LC panel, and the brightness of the LED light bar goes normal after a preset delay time. | 12-04-2014 |
20150062483 | BACKLIGHT DRIVING CIRCUIT AND LIQUID CRYSTAL DISPLAY - A backlight driving circuit is disclosed. The backlight driving circuit includes a boost circuit, a constant-current driving chip, a detecting module and a LED string coupled with the boost circuit. The boost circuit boosts an input voltage and then provides the boosted voltage to the LED string. The detecting module receives and calculates external PWM optical signals to obtain a duty-cycle ratio of the PWM optical signals, and compares the duty-cycle ratio of the external PWM optical signals with a predetermined threshold to determine if control signals have to be generated for the constant-current driving chip such that the constant-current driving chip controls the current passing through the LED string. The backlight driving circuit can operate normally even when the duty-cycle ratio of the PWM optical signals is very small. In addition, a liquid crystal display includes the above backlight driving circuit is also disclosed. | 03-05-2015 |
20150072684 | Method and Device for Selecting Network on Which Multimode Terminal is to Reside and Multimode Terminal - Disclosed are a method and device for selecting a network on which a multimode terminal is to reside and a multimode terminal. The method comprises: a service type of a network service which is currently performed by the multimode terminal is obtained; a current signal intensity of each network in the current environment for the multimode terminal is detected; power consumption information that the multimode terminal currently performs the network service is obtained; and according to preset relationships among a signal intensity, a service type and a power consumption reference value of each network, the obtained power consumption information, the detected current signal intensity of each network and the obtained service type, a network on which the multimode terminal is to reside is selected. | 03-12-2015 |