Abstract: A light source for projection system is installed on a projector and employs the field emission property between a cathode and an anode to stimulate a fluorescent powder layer for the same to emit light. The projection light source has sufficient brightness without the problems of producing high amount of heat and short service life. The high brightness of the light source enhances the quality of images projected by the projector and largely increases the economic effects of the projector.

Abstract: A light emitting device comprises a first pixel portion that includes a light emitting portion arranged between two electrodes on a first substrate, a transistor portion formed on a second substrate arranged to be opposed to the first substrate, a connection electrode extended from one of the two electrodes, and an electrical contact portion in surface contact with both the connection electrode and a drain of the transistor portion.

Abstract: A flat panel display and a method of fabricating the same are provided. The flat panel display includes a conductor, and a passivation layer pattern disposed on a side end of the conductor. As such, the passivation layer pattern can prevent or reduce corrosion and damage of the conductor. In one embodiment, the conductor includes a conductive layer formed of a material selected from the group consisting of aluminum and an aluminum alloy. The passivation layer pattern may be formed of an organic material or an inorganic material.

Abstract: An object of the present invention is to provide a light emitting device which is high in emission intensity and stable, that is to say, a light emitting device in which when an LED or LD having an emission peak at 380 nm to 410 nm is used as an excitation light source of the light emitting device, the emission intensity of a red phosphor does not largely change to some deviation of the emission wavelength of the LED or LD to maintain not only brightness but also a balance at the time when mixed with a blue and green phosphors.

Abstract: The electroluminescent system comprises an electroluminescent device (1) having a first, two-dimensional electrode (2) made of a transparent material. A layer (3,4) made of luminescent dielectric is assigned to each of the large surfaces of said first electrode (2). Said luminescent layers (3,4) are transparent and are made of materials that can emit light with different wavelengths. An electrode (5,6) is assigned to each large surface of the luminescent layers (3, 4) opposite the common electrode (2). A support layer (T) which is also made of transparent material is located on the front side of said electroluminescent device (1). A voltage source (11, 12) is connected between two successive electrodes (5, 2, 6).

Abstract: A method for manufacturing an organic light-emitting device includes preparing a substrate on one of the surfaces of which a plurality of individual electrodes is provided; forming frame-shaped partition walls partitioning the individual electrodes; forming organic semiconductor layers inside the respective partition walls, the organic semiconductor layers each containing a luminescent layer; forming a common electrode so that it overlaps the organic semiconductor layers and the partition walls; and forming narrow conductors on the partition walls by a plurality of times of vacuum deposition between the formation of the partition walls and the formation of the common electrode, the narrow conductors having the function to decease the electric resistance of the whole common electrode by contact with the common electrode. In forming the conductors, the conductors are formed in divided micro strip portions connected to each other using the same mask.

Abstract: A multicolor organic light emitting device employs vertically stacked layers of double heterostructure devices which are fabricated from organic compounds. The vertical stacked structure is formed on a glass base having a transparent coating of ITO or similar metal to provide a substrate. Deposited on the substrate is the vertical stacked arrangement of three double heterostructure devices, each fabricated from a suitable organic material. Stacking is implemented such that the double heterostructure with the longest wavelength is on the top of the stack. This constitutes the device emitting red light on the top with the device having the shortest wavelength, namely, the device emitting blue light, on the bottom of the stack. Located between the red and blue device structures is the green device structure.

Abstract: The invention describes a light-emitting device which comprises at least a substrate (1), an anode (2), a first hole transport layer (3), a light-emitting layer (5) and a cathode (6), and in which a first hole blocking layer (4) is arranged between the first hole transport layer (3) and the light-emitting layer (5). The hole blocking layer (4) reduces the concentration of holes which reach the light-emitting layer (5) and thus the concentration of holes, which are usually the majority charge carriers, can be adapted to the electron current.

Abstract: A color tunable light-emitting device comprising a first light-emitting element, a passive light transformative element, an active light transformative element (e.g. an electrochromic element) disposed between the first light-emitting element and the passive light transformative element; and at least one light transmissive element. Active light transformative elements which may be employed are illustrated by electrochromic elements, photochromic elements, and thermochromic elements.

Abstract: The present invention provides an organic electroluminescence device which: brings physical properties, that is, a low ionization potential, large band gap energy, high injection efficiency, and a high mobility into balance in an excellent manner; has high heat resistance; and shows high current efficiency and a long lifetime while maintaining good luminance/voltage characteristics and good current density/voltage characteristics, and a novel amine-based compound for realizing the device. The amine-based compound is of a specific structure containing a quinoxaline ring. The organic electroluminescence device includes an organic thin film layer composed of one or more layers including at least a light emitting layer, the organic thin film layer being interposed between a cathode and an anode. In the organic electroluminescence device, at least one layer of the organic thin film layer contains the amine-based compound alone or as a component of a mixture.

Abstract: An organic electroluminescence device, comprising multiple light-emitting layers laminated between a pair of electrodes, wherein an electrode on a side where emitted light is outgoing from the light-emitting layer is a translucent and half-reflective metal electrode. According to the present invention, an organic electroluminescence device having a multi-photon device structure that is improved in light withdrawal efficiency and obtains high-brightness light emission is provided. Furthermore, an organic electroluminescence device which exhibits high-brightness light emission, and which is superior in directivity and low in brightness irregularity.

Abstract: An organic electro-luminance display device includes a first substrate including a plurality of sub-pixels, a first electrode on the first substrate, a buffer layer on the first electrode of a region that partitions each of the sub-pixels, a spacer on the buffer layer, the buffer layer and the spacer being integrally formed, an organic light-emitting layer on the first electrode that corresponds to each of the sub-pixels and the spacer, and a second electrode on the organic light-emitting layer.

Abstract: In an electronic device comprising a protective barrier layer stack comprising a first barrier layer of a first amorphous carbon modification and a second barrier layer of a second amorphous carbon modification, the protective barrier layer stack has higher densities, better adhesion, and more flexibility than a single barrier layer of comparable thickness and composition.

Abstract: An organic light-emitting diode (OLED) display including a substrate, an OLED, a driver IC electrically connected to the OLED, and a sealing substrate having inner and outer surfaces, wherein the sealing substrate is affixed to the substrate such that both the driver IC and the OLED are enclosed between the inner surface of the sealing substrate and the substrate.

Abstract: An object of the invention is to provide a display device which can be manufactured with usability of a material improved and with a manufacturing step simplified and to provide a manufacturing technique thereof. One feature of a light emitting display device of the present invention is to comprise a gate electrode formed over a substrate having an insulating surface with a substance having a photocatalytic function therebetween, a gate insulating layer formed over the gate electrode, a semiconductor layer and a first electrode formed over the gate insulating layer, a wiring layer formed over the semiconductor layer, a partition wall covering an edge portion of the first electrode and the wiring layer, an electroluminescent layer over the first electrode, and a second electrode over the electroluminescent layer, wherein the wiring layer covers the edge portion of the first electrode.

Abstract: An organic light-emitting diode (OLED) device, comprising: an OLED formed on a substrate having a first and second electrodes and one or more light-emitting organic material layers formed between the electrodes, the organic material layer(s) having a first optical index and at least one of the electrodes patterned to define light-emitting areas; a cover formed over the OLED wherein the cover or substrate is transparent and has a second optical index and the light is emitted through the transparent cover or substrate; a light-scattering layer formed between the cover and substrate for scattering light; a low-index element having an optical index lower than the first and second optical indices formed between the scattering layer and the transparent cover or substrate; and a contrast-enhancement layer comprising a plurality of alternating light-absorbing portions and light-transmissive portions formed in the layer located between the light-scattering layer and the transparent substrate or cover through which lig

Abstract: A dual display device has pixels and each pixel includes a transparent substrate, an active driving circuit, a top organic LED, a bottom organic LED, an insulation layer that covers the active driving circuit and the bottom organic LED, and a contact hole. A connection element covers the insulation layer, the top organic LED is deposited on the connection element, and the anodes of the two LEDs electrically connect to the active driving circuit through the contact hole by the connection element. Hence, each pixel forms a structure that two organic LEDs stack together on the transparent substrate and the top and bottom organic LEDs can be driven respectively so as to achieve the dual display device.

Abstract: An organic electroluminescent display comprises a shadow layer, a transparent electrode, a light emitting layer, a reflective electrode and a cap layer formed on a substrate. The transparent electrode is connected to a transistor, located on the shadow layer, and has a larger area than the shadow layer. The cap layer is formed on the upper surface of the transparent electrode, and corresponds to the shadow layer. The light emitting layer is formed on the upper surface of the transparent electrode. And, the reflective electrode is formed on the upper surface of the light emitting layer.

Abstract: An emissive device includes a substrate; a plurality of first electrodes; pixel banks having a plurality of openings each corresponding to the position of a corresponding one of the first electrodes; organic function layers disposed in at least the openings; a second electrode disposed so as to cover the pixel banks and the organic function layers; a first inorganic layer disposed over the second electrode; a second inorganic layer disposed over the first inorganic layer; an organic buffer layer disposed over the second inorganic layer; and a gas barrier layer disposed over the organic buffer layer.

Abstract: A flat panel display device, including a substrate, a display unit disposed on the substrate, a sealing substrate affixed to the substrate to enclose the display unit therebetween, and a sealant composition disposed between the substrate and the sealing substrate, wherein the sealant composition includes an adhesive component and colored spacers.

Abstract: A plasma display panel is provided. The plasma display panel includes a first substrate, a second substrate facing the first substrate, a plurality of discharge cells which are formed by partitioning a space between the first and second substrates, a plurality of address electrodes which are formed on the first substrate to extend in a first direction, a plurality of first and second electrodes which are formed on the first substrate to extend in a second direction perpendicular to the first direction. The first and second electrodes being electrically separated from the address electrodes and facing each other with the discharge cells interposed therebetween.

Abstract: A dielectric barrier discharge lamp is disclosed, which comprises a discharge vessel having a principal axis. The discharge vessel encloses a discharge volume filled with a discharge gas. The discharge vessel further comprises end portions intersected by the principal axis. At least one electrode of a first type and at least one electrode of a second type are used in the lamp. The electrodes of one type are energized to act as a cathode and the electrodes of other type are energized to act as an anode. The electrodes are substantially straight, elongated electrodes with a longitudinal axis substantially parallel to the principal axis of the discharge vessel. At least one of the electrodes is positioned within the discharge volume, and the electrodes of at least one type are isolated from the discharge volume by a dielectric layer. At least one of the electrodes inside the discharge volume is provided with an outer luminescent layer.

Abstract: A plasma display panel includes a first substrate; a second substrate facing the first substrate with a distance therebetween; barrier ribs disposed between the first substrate and the second substrate and defining a plurality of discharge cells; address electrodes disposed on the first substrate and extending in a first direction; first electrodes and second electrodes disposed on the second substrate in correspondence with the discharge cells and extending in a second direction crossing the first direction; and a dielectric layer disposed on the second substrate and covering the first electrodes and the second electrodes; wherein the dielectric layer has a groove at a position corresponding to a boundary between neighboring ones of the discharge cells.

Abstract: The present invention relates to a plasma display device. A reduction layer is directly formed on a front substrate of a panel. Accordingly, the manufacturing cost of the plasma display device can be saved, phenomena, such as Moire and double image, can be improved, a bright and dark room contrast ratio can be improved, and a sharper picture quality can be provided. Further, the reduction layer includes a conductive material. Accordingly, there are advantages in that EMI and NIR can be shielded, and an erroneous operation occurring when the plasma display device is driven can be prevented.

Abstract: A tubular plasma display (TPD) is composed of an electroded sheet (electroded sheet) attached to an array of plasma tubes. Both the electrode sheet and the plasma tube array contain wire electrodes, which create very electrically conductive lines and the ability to address very large displays. The electroded sheet is composed of a thin flexible polymer substrate with embedded wire sustain electrodes. Each plasma tube is individually sealed and contains a wire address electrode, a hard emissive coating, a color phosphor and a Xenon based plasma gas. Polymer-based color filter coatings may also be applied to the surface of the plasma tubes after they are gas processed and sealed to drastically increase the bright room contrast, brightness, and color purity of the display.

Abstract: The present invention presents top/bottom widths of the first and second barrier rib of the plasma display device. The first barrier rib fulfills a condition of 0<the bottom width?the top width<80 ?m or/and the second barrier rib fulfills a condition of 0<the bottom width?the top width<50 ?m. Furthermore, at least one of a first condition of 0.63<a value where the first length of a region of the rear substrate other than a region in which the barrier ribs are formed in a discharge space within the discharge cell and a region in which the scan electrode is overlapped is divided by the first pitch of the discharge cell<1, a second condition of 0.24<a value where the second length of the region is divided by the second pitch of the discharge cell<1, and a third condition of 0.15<a value where an area of the region is divided by an area of the discharge cell<1 is fulfilled.

Abstract: A plasma display panel comprising at least a blue phosphor layer and a green phosphor layer, the blue phosphor layer containing BaMgAl10O17:Eu particles, Eu containing Eu3+, a ratio of Eu3+ to Ba at a surface of each BaMgAl10O17:Eu particle being 1.5 or more (atomic ratio: measured by XPS).

Abstract: Provided is a display device comprising a first substrate and a second substrate facing each other with a plurality of discharge cells therebetween, a plurality of first electrodes formed on an inner surface of the first substrate, a plurality of curved electron emission sources disposed on the inner side of the first substrate to correspond to the first electrodes, a discharge gas filled in the discharge cells, and light emitting layers formed on inner walls of the discharge cells.

Abstract: A plasma display panel is constructed with sustain electrodes including a plurality of electrically conductive particles. The electrically conductive particles include ceramic particles and coating layers that coat the surface of the ceramic particles, and include at least one selected from the group consisting of metals, alloys, and mixtures thereof. The electrically conductive particles of the coating layers disposed to be adjacent each other are connected to each other to form a current path through the whole of each sustain electrode.

Abstract: A method for fabricating a multi-cell electronic circuit array and exemplary multi-cell electronic circuit arrays are disclosed. In one embodiment, a multi-cell electronic circuit array includes an elongate substrate having a linear array of first electronic cell components micro fabricated thereon. The elongate substrate is inserted into a tubular enclosure which has at least one second electronic cell component which interacts with the first electronic cell components.

Abstract: A method of forming a dielectric layer in PDP is provided. The method according to the present invention comprises, (a) forming a green sheet comprising a base film and a film-forming layer disposed on a surface of the base film, wherein the film-forming layer is formed on the surface of the base film by applying onto said surface of the base film a slurry containing a PbO-based glass powder, a binder, a dispersing agent, a plasticizer and a solvent; (b) transferring the film-forming layer of the green sheet onto a surface of a substrate, wherein electrodes are disposed on the surface of the substrate; and (c) sintering the film-forming layer.

Abstract: Provided is a display device. The display device includes: a first substrate and a second substrate facing each other with a plurality of discharge cells therebetween; a plurality of first electrodes formed on an inner surface of the first substrate; a plurality of electron emission sources disposed on the inner side of the first substrate to correspond to the first electrodes, and emitting electrons into the discharge cells; a discharge gas filled in the discharge cells; light emitting layers formed on inner walls of the discharge cells; and protective layers covering the light emitting layers, and formed of materials through which excitation sources for exciting the light emitting layers can be transmitted.

Abstract: Provided is a display device. The display device comprises a first substrate and a second substrate opposing each other at regular intervals, a plurality of barrier ribs disposed between the first substrate and the second substrate and partitioning a space between the first substrate and the second substrate to form a plurality of light-emitting cells, an excitation gas filled in the light-emitting cells, a light-emitting layer formed on inner walls of the light-emitting cells, and a first electron emission member disposed in each of the light-emitting cells inside the first substrate, emitting a first electron beam for exciting the excitation gas into the light-emitting cells and including a first electrode formed on an inner surface of the first substrate and a first electron emission source formed of boron nitride bamboo shoot (BNBS) on the first electrode.

Abstract: The present invention relates to a metal halide burner with ceramnic discharge vessel, a lamp with said burner, and a method for manufacturing said burner with one discharge vessel having two end parts (2a, 2b) each with one end opening (3a, 3b), a filling (8), two end closure constructions (4a, 4b) for closing said end openings (3a, 3b), and crevices (7a, 7b) between the end openings (3a, 3b) and the end closure constructions (4a, 4b), wherein the first end closure construction (4a) differs from said second end closure construction (4b) in at least shape, type of material of the components and/or arrangement of components; and/or the shape of said first crevice (7a) differs from the shape of said second crevice (7b); and/or the first end part (2a) differs from the second end part (2b) in shape, type of material of one component, and/or the arrangement of components; so that an asymmetric ceramic metal halide burner is achieved.

Abstract: A high intensity discharge lamp (10) has an envelope (12) having a base end (12a), a middle portion (12b) and domed end (12c) arrayed along an envelope longitudinal axis (14). Two spaced apart electrical lead-ins (34, 36) are sealed in the base end (12a) and extend into the envelope (12). A substantially U-shaped frame (38) is within the envelope (12) and the U-shaped frame comprises glass tubing 26a. A light source (16) has an arc discharge capsule (16b) positioned within the frame (38) and a containment vessel (18) is spaced from and surrounds the arc discharge capsule 16b. The containment vessel (18) comprises a transparent structure (19) attached to the frame (38) and formed to provide multiple, independent, localized fractures capable of absorbing the given kinetic energy possessed by the shards.

Abstract: An illumination control circuit allows a user to set a desired brightness level and maintains the desired brightness level over temperature and life of a light source. The illumination control circuit uses a dual feedback loop with both optical and thermal feedbacks. The optical feedback loop controls power to the light source during normal operations. The thermal feedback loop overrides the optical feedback loop when the temperature of the light source becomes excessive.

Abstract: Electrodeless discharge lamp lighting device. Start circuit 19 sweeps operating frequency of resonance circuit 16 from start frequency to end frequency of resonance frequency side through drive circuit 18 and DC/AC conversion circuit 15, and starts electrodeless discharge lamp 13. Control circuit 10 increases or decreases variable power into circuit 18 so that detection current comes to equal prescribed current for shifting the operating frequency to middle range frequency between the start frequency and the end frequency. The prescribed current is set so that the detection voltage in case of the middle range frequency becomes lower than that in case of the end frequency. Capacitor 106 constituting integration circuit starts suppression of operation of circuit 10 when lamp 13 is started, and holds the suppression during at least start mode. Accordingly, it is possible to stably start lamp 13 and control stress on circuit(s) after lamp 13 is successfully started.

Abstract: This invention relates to a backlight driving apparatus of a liquid crystal display device, and more particularly to a backlight driving apparatus of a liquid crystal display device that includes: first and second transformers that boost an AC voltage to a boosted AC voltage that is supplied to a U-shaped lamp; and a virtual ground fixing means that causes a virtual ground of the U-shaped lamp to be fixed at the center of a bent part of the U-shaped lamp by causing the boosted AC voltage that is output from the first and second transforming means to be identical in size.

Abstract: An electronic dimming ballast comprises a filament turn-off circuit for controlling the magnitudes of filament voltages supplied to the filaments of a gas discharge lamp. Each of a plurality of filament windings is directly coupled to one of the filaments and is operable to supply a small AC filament voltage to the filaments. The plurality of filament windings and a control winding are loosely magnetically coupled to a resonant inductor of an output circuit of the ballast. A controllably conductive device is coupled across the control winding. When the controllably conductive device is conductive, the voltage across the control winding and the filament windings falls to zero volts. The controllably conductive device is driven with a pulse-width modulated (PWM) signal so as to control the magnitudes of the filament voltages. The filament voltages are provided to the filaments before striking the lamp, and when dimming the lamp near low end.

Abstract: A lighting-drive device includes: a lighting-drive circuit configured to drive a lamp for lighting of the lamp; an activation circuit configured to produce an activation voltage to be applied to the lamp in order to start lighting of the lamp; and an activation operation detector configured to be provided with a sensing member for sensing an induced voltage and output an operation state notification signal depending on a state of the induced voltage. The sensing member is provided on a circuit substrate on which the activation circuit is formed in such a manner as to be allowed to sense the induced voltage. The activation current flows in response to the activation voltage produced by the activation circuit. The operation state notification signal indicates whether or not the activation circuit has operated normally. The lighting-drive circuit, the activation circuit and the activation operation detector are integrated into one single component.

Abstract: A light source device which can also advantageously control the growth of the projection using the DMD type is achieved in a light source device which has an ultrahigh pressure dicharge lamp) in which the silica glass discharge vessel is filled with greater than or equal to 0.15 mg/mm3 mercury and bromine; a feed device; an oval reflector; and a color wheel by the electrode on the side of the opening of the oval reflector of the discharge lamp having an increased diameter, and the relation 0./06<W/I2<0.96 between the volume W (mm3) of the tip area with increased diameter and the current value I being satisfied.

Abstract: A control circuit of a DC/DC converter is provided for supplying a driving voltage to a light emitting element. A hysteresis comparator compares a detection voltage that corresponds to the output voltage of the DC/DC converter with two threshold voltages. If the detection voltage is smaller than the lower threshold voltage, the hysteresis comparator outputs a comparison signal at the low level. Otherwise, the comparison signal is set to the high level. The switching control unit uses the comparison signal as a reference. The switching control unit instructs the switching transistor of the DC/DC converter to perform the switching operation during a period when the comparison signal is at the low level. Otherwise, the switching operation is suspended. The control circuit inhibits light emission of the light emitting element during a period when the comparison signal is at the low level. Otherwise, the control circuit permits the light emission.

Abstract: A correlation system is provided which is adapted for use with a lighting system (102) associated with one or more wands (104). The lighting system (102) includes lighting units (106) having lights (107). The lights (107) are controlled by a controller (108). Switch units (128) are provided. Through signals transmitted from the wands (104), control relationships can be established between the switch units (128) and the lighting units (106).

Abstract: A cold-cathode tube lighting device uniformly lights a plurality of cold-cathode tubes using a common power source, and maintains the luminance of each cold-cathode tube uniformly in the longitudinal direction thereof at high precision. A first block converts a direct-current voltage to one pair of alternating-voltages. Since leakage impedances of step-up transformers are low, the first block functions as one pair of low-impedance power sources. Each second block is connected to each cold-cathode tube. A ballast inductor stabilizes tube current by resonating with a matching capacitor during lighting of the cold-cathode tube. A combined impedance of the matching capacitor and a peripheral stray capacitance is matched with an impedance of the ballast inductor, for each cold-cathode tube. Since a delay circuit shifts phases of two pulse waves with respect to each other, a phase difference between the alternating-voltages is shifted from 180°.

Abstract: A vehicle lighting apparatus includes a plurality of semiconductor light sources that are connected with each other in series, a switching regulator for supplying an electric power from a power source to each of said plurality of semiconductor light sources, forward voltage detection circuitry for detecting a forward voltage of each of said plurality of semiconductor light sources, and failure detection circuitry for detecting the failure of each of said semiconductor light sources based on the detected value of said forward voltage detection means. A semiconductor light source having a lower forward voltage is connected closer to a reference potential side of said power source among said plurality of semiconductor light sources.

Abstract: A method and apparatus are provided for generating light such as ultraviolet light from excimer-forming gases. Gases are excited by radio frequency alternating current powered electrodes (200, 210) to form excimers that will decay and emit vacuum ultraviolet light. The halogen concentration is optimized so as to optimize emissions from halogen excimers (Z2*) or mixed rare gas/halogen excimers (RGZ*). Emissions from rare gas excimers (RG2*) are maximized by maintaining the gas in the discharge region at a relatively low temperature, desirably below 700° K, so that the average kinetic energy of gas particles is less than the vibrational excitation energy of the excimer and substantially less than the dissociation energy of the excimer. Relatively large electrodes (202, 204) can be used to cool the plasma.

Abstract: A field winding synchronous generator-motor includes: a power conversion section that is connected to an electric rotating machine and operating as a generator-motor, and that controls the electric rotating machine; a compensation amount storage section that stores a compensation capable of improving characteristics of the electric rotating machine from a reference position of a rotor; a positional compensation operation section that makes a compensation operation of positional information from a rotor position and a value of the compensation amount storage section; a conducting phase storage section that stores a conducting phase to each armature winding from the reference position; and a rectangular wave application voltage command section that commands a rectangular wave application voltage to each armature winding with respect to the power conversion section from a value of the positional compensation operation section and a value of the conducting phase storage section.

Abstract: An electronic control circuit controls a brushless DC motor. It includes an input power supply control circuit. A microcontroller integrated circuit has control functions to control a brushless DC motor. Additional control functions are provided by software program instructions, which when executed, cause the microcontroller integrated circuit to perform additional control functions for the brushless DC motor.

Abstract: A multi-stage contactless switch, in particular for an operating element in a motor vehicle, has a movably arranged magnet and several Hall sensor elements spaced apart from each other. Each Hall sensor element is capable of activating a particular switching state depending on a magnetic field of the magnet as detected by the Hall sensor.

Abstract: A control system for a motor. The control system and the motor receive an external power. The control system comprises a driver and a switch device. The driver is electrically connected to the motor. The switch device is electrically connected between the external power and the driver and turned on or off according to a control signal. The driver drives the motor according to the external power when the switch device is turned on.