Shenzhen China Star Optoelectronics Technology Co., Ltd.

Fremont Micro Devices Corporation

Chenzhen China Star Optoelectronics Technology Co., Ltd.

Chong Huang

Yu-Chun Hsiao

Yi-Cheng Kuo

Quan Li

Jia-He Cheng

Cheng-Wen Que

Liu-yang Yang

Yuchun Hsiao

Yicheng Kuo

Jiahe Cheng

Chengwen Que

Liuyang Yang

Yu-chun Hsiao

Yi-cheng Kuo

Kelvin Yupak Hui

Yewen Wang

Changcheng Lo

Yuquan Huang

Gege Zhou

Shihhsiang Chen

Guofu Tang

Weifeng Chen

Rui-Lian Yang

Pangling Zhang

Yajun Yu

Chengling Lv

Zexin Wu

Ruilian Yang

Xueren Yang

An adding circuit for multi-channel signals and an implementation method thereof are disclosed. The adding circuit for multi-channel signals includes an operational amplifier, a plurality of charge and discharge circuits, a charge transfer circuit, a switch sequence and a control circuit. In this disclosure, the duty cycle of each charge and discharge circuit and the charge transfer circuit can be programmed and preset according to the actual needs, which is not only suitable for the static voltage adding circuit, but also suitable for the dynamic voltage adding circuit. When there are multi-channel signals, the output interference caused by individual signals can be prevented. The area of the adding circuit can be greatly reduced. The adding circuit can be IP-based, controlled by programing and presetting a variety of combined adding algorithms, so the chip cost can be saved and a wide applicability in detection and monitoring can be provided.

Adding circuit for multi-channel signals and implementation method of adding circuit for multi-channel signals

Disclosed by present disclosure are a self-powered power supply drive circuit and a self-powered power supply drive chip. The self-powered power supply drive circuit includes a charging detection circuit, a current sampling switch tube, a charging switch tube, a sampling circuit and a control circuit. The drive tube and current sampling switch tube, which are connected in series, are connected between the input power supply and the ground. The current sampling switch tube is switched off and the charging switch tube is switched on during the pre-switching-off stage, such that the current which flows through the drive tube during the pre-switching-off stage is used to charge the energy storage circuit. The charging time is in the pre-switching-off stage, which never affects the normal switching cycle of the drive tube itself and the normal output of energy. Moreover, this way of charging does not require any additional auxiliary coil winding.

Self-powered power supply drive circuit and chip

Disclosed by present disclosure are a Darlington transistor drive circuit, a Darlington transistor drive method and a switching power supply management chip. In this embodiment, the Darlington transistor is driven sectionally. At the beginning of the switching-on cycle, the driving of the primary transistor is not started temporarily, instead the drive source is used to drive the secondary transistor. After the secondary transistor is completely switched on, the drive source of the secondary transistor is switched off and the drive source of the primary transistor is switched on to drive the Darlington transistor. The primary and secondary transistor have been completely switched on, and the drive current of the secondary transistor never depend on the primary transistor, so the voltage at the input terminal of the secondary transistor can be smaller than the voltage at the control terminal of the secondary transistor. Such that the switching-on power loss is reduced.

Darlington transistor drive circuit, method and switching power supply management chip

Disclosed are a Darlington transistor drive circuit, a Darlington transistor drive method implemented based on such Darlington transistor drive circuit, and a constant current switching power supply including such Darlington transistor drive circuit. The Darlington transistor drive circuit includes a drive current circuit, two switch units, and a drive control circuit used for controlling the two switch units to be switched off during the switching-on cycle of the Darlington transistor and to be switched on during a switching-off cycle of the Darlington transistor, and for changing an equivalent resistance of the two switch units at different stages during the switching- off cycle of the Darlington transistor. The switching-off time delay of the Darlington transistor is greatly reduced while achieving the EMI optimization. In additional, the switch loss of Darlington transistor is small when it is switched off, and the efficiency is improved.

Darlington transistor drive circuit, method and constant current switching power supply

Disclosed is a packaging device for a liquid crystal panel, including a first main body having a bottom and a plurality of sidewalls connected to sides of bottom. The sidewalls define at least one opening. At least one second main body has a bottom and sidewalls connected to the bottom and define an opening that is movably received in the at least one opening of the first main body such that the packaging device is expandable by moving the second main body in a direction away from the first main body.

Package device for liquid crystal panel

A flat panel display device comprising a backboard and a display panel fitted therewith is provided. The edge of the backboard is structured as a barrier wall extending perpendicular to the body of the backboard. A stepped groove is arranged on the interior face of the barrier wall for supporting the display panel and forming accommodating space between the display panel and the body of the backboard. The stepped groove extends from an outer end of the barrier wall towards the body of the backboard, and the depth of the stepped groove is consistent with the thickness of the display panel. The backboard is made of plastic plate containing a enhancing element. The flat panel display device according to the present disclosure can be designed as a light and thin display device with no frame, and thus is suitable for making an all-in-one machine.

Flat panel display device

The present invention discloses a frame for holding a display panel. The frame includes a number of side frames and at least one rotating part. The side frames are connected end to end to form an enclosed frame for accommodating the display panel. The side frame defines at least one cutout extending along a longitudinal direction of the side frame. The rotating part is received in the cutout and is rotatably connected to the side frame via a rotating axis extending along the longitudinal direction of the side frame. The display panel is assembled in the enclosed frame via the rotating part. The present invention further provides a display device having the frame.

Frame and display device using same

The invention provides a backlight module, including: an optical plate and an optical film, wherein at least one edge of optical film being disposed with a protruding ear, protruding ear having a via hole; backlight module further comprising at least a hanging element; wherein a side of the optical plate corresponding to edge of optical film with protruding ear being fixedly connected to hanging element; optical film being disposed on top of optical plate and via hole hanging on hanging element so as to fasten optical film. The backlight module improves the fix reliability of optical plate and prevents from arching up caused by thermal expansion. Because optical plate and optical film expand simultaneously due to heat, the wavy curve of the optical film is avoided and optical quality is improved. The present invention also discloses a liquid crystal display device with the backlight module.

Backlight module and liquid crystal display device

A liquid crystal module is disclosed. The liquid crystal module includes a back plate having a vertical plate, a plastic frame arranged on the vertical plate for supporting the liquid crystal glass, a connecting assembly and a front frame. The connecting assembly is arranged above the plastic frame. An engaging location of the connecting assembly and the plastic frame is adjustable. A lateral side of the connecting assembly abuts against an edge of the liquid crystal glass. The front frame arranged above the connecting assembly is fixed with the connecting assembly. The front frame covers a rim of the liquid crystal glass. The relative location of the front frame and the liquid crystal glass can be easily adjusted via the connecting assembly. In addition, the displacement of the display area resulting from assembly errors is avoided. As such, the display area and the exposed black matrix remain consistent.

Liquid crystal module and liquid crystal display

The present invention provides a back frame of a flat panel display device. The back frame includes at least two assembling pieces. The at least two assembling pieces are joined to form the back frame. The back frame further includes a bracing piece, which is of a multiple-stepped configuration and is mounted to the assembling piece. The present invention also provides a bracing piece and a backlight system. The back frame and backlight system of flat panel display device of the present invention make the structure of a back frame mold simple, reduce the cost of back frame mold, save the material used for the back frame, and lower down the cost of flat panel display device. Further, the bracing piece of the back frame is applicable to various mounting heights of mounting holes, can be manufactured together in a unified manner, reduces the cost of mold, and improves manufacturing efficiency.

Bracing piece, back frame, and backlight system of flat panel display device

The invention provides a packaging device for liquid crystal panel, including: first main body, further including bottom, and a plurality of side walls connected to sides of bottom, wherein side wall forming an opening; second main body, further including bottom and a plurality of side walls connected to sides of bottom, wherein side walls forming an opening; wherein opening of second main body slightly smaller than opening of first main body, and facing towards opening of first main body; second main body able to move adjustably into first main body; bottom and side walls of first and second main bodies forming loading space for loading liquid crystal panel. The packaging device can be expanded when in use for loading large-sized panels, and size of packaging device can be reduced when idled or recycled to enhance efficiency.

Packaging device for liquid crystal panel

Disclosed is a method for manufacturing an LED light bar and an LED light bar thereof. The method includes: providing a metal substrate and a plurality of LED lights; forming a graphene layer on the metal substrate in such a way that the graphene layer includes hollow sections formed to correspond to the LED lights; mounting the LED lights to the metal substrate in the hollow sections; and forming silicone layers in the hollow sections. The LED light bar includes a graphene layer formed on a metal substrate and silicone layers are provided for planarization and heat transfer so as to effectively enhance heat dissipation performance of the LED light bar and extend lifespan of the LED light bar.

Method for manufacturing LED light bar and LED light bar thereof

A method for manufacturing a light-emitting device is provided, including: providing a base, which includes a heat dissipation layer made of graphene; forming a buffer layer on the heat dissipation layer; and forming a light emission unit on the buffer layer. The light-emitting device so made includes a graphene-made heat dissipation layer that effectively dissipates away heat emitting from an emissive layer of the light emission unit so as to effectively reduce the temperature of the light-emitting device and extend the service life of the light-emitting device. Particularly, when the light-emitting device is a light-emitting diode, the emissive layer thereof is a quantum dot emissive layer for effectively improving color saturation of the light-emitting diode and enhancing color displaying performance of the light-emitting diode.

Light-emitting device and manufacturing method thereof

A back frame including at least two main pieces is disclosed. The adjacent main pieces are assembled via assembly sections, and a plurality of anchor points are arranged on different locations of each of the assembly sections. The size of the back frame is variably configured by assembling the adjacent main pieces through different anchor points. The main pieces with anchor points on different locations may be manufactured by the same mold. The main pieces are assembled to form back frame with different sizes so as to reduce the mold cost and the manufacturing cost.

Growing community of inventors

Shenzhen, China

Chong Huang