Abstract: A plasma display device and a driving method therefor are provided. The driving method includes gradually decreasing a voltage of a first electrode during a reset period, biasing a voltage of a second electrode to a first voltage during a first period of the falling period, and biasing the second electrode to a second voltage lower than the first voltage during a second period of the falling period. The first voltage is higher than a voltage that is applied to the second electrode during an address period. Therefore, as a voltage of the second electrode is biased to a predetermined voltage in a falling period of a reset period, wall charges of the scan electrode Y and the sustain electrode X can be fully erased.

Abstract: Disclosed is a method for driving a plasma display panel in which a plurality of first electrodes and second electrodes are arranged parallel to each other, a plurality of third electrodes are arranged to cross the first and second electrodes, and discharge cells defined with areas in which the electrodes cross mutually are arranged in the form of a matrix. According to the driving method, a reset period is a period during which the distribution of wall charges in the plurality of discharge cells is uniformed. An addressing period is a period during which wall charges are produced in the discharge cells according to display data. A sustain discharge period is a period during which sustain discharge is induced in the discharge cells in which wall charges are produced during the addressing period.

Abstract: A luminescent display device is disclosed. The luminescent display device is comprised of an array of pixels, a first driving chip and a second driving chip. The array of pixels is comprised of columns and rows of pixels. The first driving chip is connected a first pixel of the array of pixels, and the second driving chip is connected to a second pixel of the array of pixels. The second pixel is adjacent to the first pixel. The first driving chip is not connected to all pixels in a row of the at least one row of pixels.

Abstract: An organic electroluminescent display device includes an organic light-emitting diode, a first transistor outputting a data voltage by an nth scan signal (n is a natural number), a second transistor providing a current to the organic light-emitting by the data voltage, a capacitor storing the data voltage, and a third transistor supplying the second transistor and the capacitor with a pre-charge voltage by an (n?1)th scan signal, the pre-charge voltage having an opposite polarity to the data voltage.

Abstract: The invention provides an electro-optical device having circuits for driving electro-optical elements, such as organic EL elements, and a driving device, which can employ driving elements having low driving ability, such as ?-TFTs. By providing a charge storage capacitor between the source electrode and the gate electrode of a driving transistor which is between power sources, the electro-optical device can allow the driving transistor to control a driving current, even when an electro-optical element is connected to the source side of the driving transistor. In addition, driving data can be stored in the charge storage capacitor by applying a predetermined voltage to the source electrode of the driving transistor.

Abstract: A method for the correction of average brightness or brightness uniformity variations in electroluminescent (EL) displays comprising: a) providing an EL display having one or more light-emitting elements responsive to a multi-valued input signal for causing the light-emitting elements to emit light at a plurality of brightness levels; b) measuring the brightness of each light-emitting element at two or more, but fewer than all possible, different input signal values; c) employing the measured brightness values to estimate a maximum input signal value at which the light-emitting element will not emit more than a predefined minimum brightness and the rate at which the brightness of the light-emitting element increases above the predefined minimum brightness in response to increases in the value of the input signal; and d) using the estimated maximum input signal value at which the light-emitting element will not emit light more than the predefined minimum brightness and the rate at which the brightness of the l

Abstract: An image processing device of a liquid crystal display device includes a digital signal reception interface, a digital signal output interface, a plurality of image signal reception interfaces, an image processing unit coupled to an output terminal of the digital signal reception interface and the image processing unit, a switch unit coupled to the output terminal of the digital signal reception interface, an input terminal of the digital signal output interface, and the image processing unit, for transmitting signals outputted from the output terminal of the digital signal reception interface or a processed result of the image processing unit to the input terminal of the digital signal output interface according to a control signal, and a control module coupled to the image processing unit and the switch unit, for outputting the control signal.

Abstract: A method and system for frame insertion in a digital display system is provided. The method is adapted for use with a liquid crystal display (LCD) type display and is effective to substantially reduce motion blur. The LCD display receives a sequence of digitized input frames at a first frequency. The method generates a sequence of output frames that include the digitized input frames interspersed with a plurality of modified frames. Each of the modified frames is substantially similar to a preceding digitized input frame, but has a reduced luminance. The modified frames may be generated by multiplying a preceding digitized input frame by a reduced luminance factor. The reduced luminance factor may be determined as a fixed value or as a function of an average pixel level of a preceding frame.

Abstract: An LCD monitor capable of automatically switching display mode, the corresponding control method and the controller for controlling the LCD monitor are provided. The LCD monitor includes a digital signal receiver, a signal certification unit, an image processor, and an LCD panel. The digital signal receiver receives a digital image signal. The signal certification unit which is coupled to the digital signal receiver determines if the digital image signal conforms to a protocol and generates a control signal. The image processor which is coupled to the digital signal receiver and the signal certification unit determines the display mode of the LCD monitor according to the control signal and processes the digital image signal according to the display mode to generate an output image signal. The LCD panel which is coupled to the image processor displays the image contents of the output image signal.

Abstract: A liquid crystal display device is provided which is capable of preventing occurrence of accidental abnormal flicker control caused by calibrating work being not related to the flicker controlling operation. The liquid crystal display device so configured that its flicker controlling system performs the flicker controlling operations on a liquid crystal displaying section by using a flicker controlling screen corresponding to a driving method for the liquid crystal displaying section is made up of an input signal pattern judging section which outputs a specified signal when judging that data for the flicker controlling screen is contained in a signal input to the liquid crystal displaying section, a COM (Common) potential controlling section which outputs a voltage adjusting signal to control a common electrode potential of the liquid crystal displaying section, and a COM potential outputting section which sets a common electrode potential of the liquid crystal displaying section.

Abstract: A liquid crystal panel includes a gate line; a data line crossing the gate line to define a pixel region; a common line parallel to the gate line; a first switching part in the pixel region for applying a first voltage from the data line to the pixel region; and a second switching part in the pixel region for applying a second voltage from the common line to the pixel region, wherein the first and second switching parts are simultaneously switched on through the gate line.

Abstract: A display substrate includes source lines, gate lines, an output pad part, a fan-out part and a first voltage line part. The source lines are in a display area. The gate lines cross the source lines. The output pad part is in a peripheral area surrounding the display area and is electrically connected to output terminals of a driving chip. The fan-out part is electrically connected between the output pad part and the source lines. The first voltage line part is inclined with respect to a central line of a chip area in which the driving chip is mounted toward opposite sides of the chip area to cross the fan-out part. Therefore, the line reactance of the fan-out part is decreased and the uniformity of the line resistance of the fan-out part is increased to improve image display quality.

Abstract: With an offset circuit including transistors of the same conductivity type, offset of an input signal is performed. Then, the input signal after the offset is supplied to a logic circuit including transistors of the same conductivity type as that of the offset circuit, thereby H and L levels of the input signal can be shifted at the same time. Further, since the offset circuit and the logic circuit are formed using the transistors of the same conductivity type, a display device can be manufactured at a low cost.

Abstract: A liquid crystal display device includes pixels, gate lines and source lines, active elements, a gate driver circuit, a source driver circuit, and a timing controller circuit. The source driver circuit conducts a prescribed operation of supplying the source signals of positive polarity and negative polarity having a prescribed voltage to the source lines during a vertical blanking interval, and electrically cutting the source lines off after the supply of the source signals while establishing a short circuit between adjoining source lines supplied with the source signals of opposite polarities, thereby causing the source lines to hold a prescribed DC voltage value.

Abstract: In a gate driving circuit and a display apparatus, the gate driving circuit comprises a plurality of stages. At least one of the stages comprises a pull-up section responsive to a first node signal; a pull-down section responsive to a second input signal; a discharging section discharging the first node signal in response to the second input signal; a first holding section responsive to the first clock signal, maintaining the first node signal at the off-voltage; and a second holding section responsive to the second clock signal, maintaining the first node signal at the off-voltage. The second holding section has a greater transistor width-to-length ratio than the first holding section. Therefore, an abnormal gate-on signal is less likely to occur, reducing driving defects of the display apparatus.

Abstract: A method, device and computer program are detailed for modulating write light. For a plurality of pixel locations of an electro-optic layer of an optical write valve and across each of a plurality of consecutive frames, a set of pixel data bits is modulated across a first and a second pulse width period of the frame. The first and second pulse width periods, and adjacent pulse periods of sequential frames, are separated from one another by a pulse-off period that is at least equal to a response time of the electro-optic layer during which no bits are modulated. Separately in each frame, write light is output from each of the plurality of pixel locations according to the modulated pixel data bits in the frame. In an embodiment, the set of pixel data bits are modulated by applying a voltage at a pixel location of the electro-optic layer in synchronism with illuminating a light source that illuminates that pixel location.

Abstract: A display method can be flexibly applied to suppress the power consumption and a device and display method which can reduce the power consumption while the image quality is prevented from being deteriorated are provided. A display device which can be operated in a progressive mode and interlace mode includes a display portion having a plurality of pixels arranged thereon and a gradation correction table which stores data used to correct a difference between a gradation level when the display portion is driven in the progressive mode and a gradation level when it is driven in the interlace mode. Then, when video data supplied to the display portion is set in the interlace mode, a timing controller corrects the video data by use of data in the gradation correction table.

Abstract: By implementing reduction in power of common electrode voltages applied from a power source of a liquid crystal drive device to common electrode interconnects of a liquid crystal display panel, respectively, reduction in power consumption of the liquid crystal display panel as a whole is attained. A VCOM operation waveform in a charging process from a second voltage VCOML to a first voltage VCOMH shows that a charging current Icha represents the sum of a charging current from VCOML to a reference voltage VCI, Icha1=Cp (VCI?VCOML)/?t, and a charging current from the reference voltage VCI to the first voltage VCOMH, Icha2=Cp (VCOMH?VCI)/?t. Accordingly, power consumed by Icha1 is the reference voltage VCI×Icha1, and power consumed by Icha2 is VCI×Icha2×2.

Abstract: A liquid crystal display device includes a display panel including one or more pixel region partitioned into first, second and third sub-pixels; a backlight including first and second sources for projecting onto the one or more pixel region one of a first light having a first wavelength and a second light having a second wavelength; and a controller for partitioning a four-color pixel data corresponding to a period into first and second data to be applied to the first and second sub-pixels, respectively, during a first part of the period while the backlight projects the first light onto the one or more pixel region, and third and fourth data to be applied to the first and second sub-pixels, respectively, during a second part of the period while the backlight projects the second light onto the one or more pixel region, the controller applying a white data to the third sub-pixel during the first and second parts of the period.

Abstract: A driving device of a plasma display panel including a gray level arrangement unit, a still frame detection unit and a gray level arrangement controller is provided. The gray level arrangement unit receives image data and arranges the image data according to different gray level arrangement rules. The still frame detection unit detects whether the image data is a still frame. The gray level arrangement controller is electrically connected to the still frame detection unit and the gray level arrangement unit, and controls the gray level arrangement unit to output the image data with different gray level arrangements according to whether the image data is a still frame or not. A driving method of a plasma display panel is also provided.

Abstract: A method of driving a liquid crystal display device includes multiplying a frame frequency of an inputted current frame to generate a multiplied odd-numbered frame and a multiplied even-numbered frame; determining whether said current frame is a still image frame or a dynamic image frame; detecting an edge area at which a motion blur occurs from the multiplied odd-numbered frame and the multiplied even-numbered frame; converting gray level values of pixels positioned at the detected edge area at the multiplied odd-numbered frame and the multiplied even-numbered frame; and continuously outputting the multiplied odd-numbered still image frame and the multiplied even-numbered still image frame or continuously outputting the multiplied odd-numbered dynamic image frame and the multiplied even-numbered dynamic image frame having the converted gray level values in accordance with the determined result. A liquid crystal display device is also disclosed.

Abstract: A display apparatus includes a display panel, a gate driver, a gray scale compensator, and a date driver. The gate driver sequentially applies gate data to the gate lines. The gray scale compensator compares the primitive gray scale data of the n-th frame with the primitive gray scale data of the (n?1)-th frame to output a compensated gray scale data of a n-th frame, when a primitive gray scale data of a (n?1)-th frame is lower than a gray scale data of a first gray scale and a primitive gray scale data of the n-th frame is higher than a gray scale data of a second gray scale. The date driver converts the compensated gray scale data into a date voltage corresponding to the compensated gray scale data and applies the data voltage to the date line. Therefore, response time of the liquid crystal molecules may be reduced.

Abstract: A data driver includes a capture start timing setting register in which is set data for setting capture start timing of the gray-scale data based on a signal which indicates supply start timing of the gray-scale data, and a capture instruction signal generation circuit which generates first and second capture instruction signals which are delayed in relation to the signal which indicates the supply start timing of the gray-scale data for a period corresponding to the data set in the capture start timing setting register. First and second data latches capture gray-scale data on a gray-scale bus at timing based on the first and second capture instruction signals, respectively. First and second driver circuits drive comb-tooth distributed data lines belonging to first and second groups based on the gray-scale data captured in the first and second data latches, respectively.

Abstract: Provided is a light emitting device. Particularly, the light emitting device comprises a threshold voltage compensator. The threshold voltage compensator is connected between a gate and a drain of the driving TFT and has a gate connected to a second scan line to temporarily store at the storage capacitor a gate voltage reflecting a threshold voltage of the driving TFT in response to a second scan signal supplied by a second scan line and to transmit the data signal regardless of variations in the threshold voltage of the driving TFT when the output current is supplied to the light emitting diode.

Abstract: An organic light-emitting diode display device includes a first switch element turned-on in response to a first scanning signal during a first period to supply a data to a first node, and then maintaining an off-state during a second period, a driving device adjusting a current through an organic light-emitting diode element in accordance with a voltage of the first node; a reference voltage source providing a reference voltage that is capable of turning-off the driving device, a second switch element maintaining an off-state during the first period, and turned-on during the second period to supply the reference voltage to the first node, and a storage capacitor maintaining the voltage at the first node.

Abstract: A liquid crystal display (“LCD”) device includes a liquid crystal panel for displaying images, a backlight unit for supplying light to the liquid crystal panel, an operation unit for generating an operation value by performing operations on pixel data supplied to the liquid crystal panel during at least one frame, a comparator which compares the operation value with a reference value and which generates a dimming signal having a high voltage level when the operation value is greater than the reference value, and which generates a dimming signal having a low level when the operation value is less than the reference value, and an inverter which drives the backlight unit according to the dimming signal.

Abstract: A TFT array substrate of a display device according to an embodiment of the present invention includes: a plurality of scanning signal lines formed in a display region; a plurality of display signal lines formed in the display region; a plurality of TFTs arraigned in matrix in the display region; a plurality of scanning lead-out lines arranged in a frame region formed outside the display region in accordance with the scanning signal lines; a gate insulating film formed on the plurality of scanning lead-out lines; and a first conductive layer formed on the gate insulating film and applied with a predetermined potential, the first conductive layer being formed to cover the plurality of scanning lead-out lines outside the sealing material.

Abstract: A display driver apparatus and an inversion method thereof are provided. The display driver apparatus includes a gate drive unit, a source drive unit, a multiplexer unit and a common voltage generation unit. The gate drive unit is used to generate a gate signal for turning on/off sub-pixels. The source drive unit is used to generate a source signal required by the display panel. The multiplexer unit is used to regulate the sequence for the source signal to be delivered to the sub-pixels. The common voltage generation unit is used to generate a common voltage and switch the level of the common voltage during the enable period of the gate signal.

Abstract: A liquid crystal display device including a liquid crystal panel, a gate driver configured to supply gate signals to gate lines on the liquid crystal panel, a data driver configured to supply data voltages to data lines on the liquid crystal panel, and a partial controller configured to control the gate driver to intercept a part of the gate signals to be supplied to the gate lines.

Abstract: A data driver drives comb-tooth distributed data lines of an electro-optical device in units of a predetermined number of data lines. The data driver includes first and second divided gray-scale buses, a gray-scale bus to which gray-scale data is supplied corresponding to an arrangement order of each of the data lines, a gray-scale data distribution circuit which distributes and outputs the gray-scale data supplied to the gray-scale bus to the first and second divided gray-scale buses, a first driver circuit which drives the data lines belonging to a first group among the data lines based on the gray-scale data output to the first divided gray-scale bus by the gray-scale data distribution circuit, and a second driver circuit which drives the data lines belonging to a second group among the data lines based on the gray-scale data output to the second divided gray-scale bus by the gray-scale data distribution circuit.

Abstract: A drive circuit of a display that decreases the number of gates in a selection circuit to reduce chip area. The drive circuit includes a first voltage dividing circuit for generating a plurality of divisional voltages by dividing a predetermined reference voltage. A selection circuit receives a selection signal and selects one of the divisional voltages. The selection circuit includes a plurality of first switch circuits selectively activated in response to the selection signal to select one of the divisional voltages. Each of the first switch circuits is provided with a logic switch function and has an ON resistance when activated. An activated one of the first switch circuits generates the pixel voltage by further dividing the selected one of the divisional voltages.

Abstract: A drive circuit of a display that decreases the number of gates in a selection circuit to reduce chip area. The drive circuit includes a first voltage dividing circuit for generating a plurality of divisional voltages by dividing a predetermined reference voltage. A selection circuit receives a selection signal and selects one of the divisional voltages. The selection circuit includes a plurality of first switch circuits selectively activated in response to the selection signal to select one of the divisional voltages. Each of the first switch circuits is provided with a logic switch function and has an ON resistance when activated. An activated one of the first switch circuits generates the pixel voltage by further dividing the selected one of the divisional voltages.

Abstract: An data driver for driving an LCD device includes a modulator that generates modulated data from input data; and a control circuit to selects between converting the modulated data to first analog data of a driving output and converting the input data to second analog data of the driving output, and to supply the driving output to the plurality of data lines. The driving output may provide a gray-to-gray response time of the LCD device substantially the same as one of a black-to-white and a white-to-black response time of the LCD device by reducing actual liquid crystal response time of the LCD device.

Abstract: A gate driving circuit and a display apparatus having the gate driving circuit include a pull-up part and a carry part pull up a present gate signal and a present carry signal, respectively, to a first clock during a first period within one frame. A pull-down part receives a next gate signal to discharge the present gate signal to a source power voltage. A pull-up driving part is connected to control terminals of the carry part and pull-up part (Q-node) to turn the carry part and pull-up part on and off. A floating preventing part prevents an output terminal of the carry part from being floated in response to the first clock during a second period within the one frame.

Abstract: A liquid crystal display (“LCD”) device capable of improving a response speed of liquid crystals includes an LCD panel for displaying images and first and second gate driving circuits connected respectively to opposite sides of each of a plurality of gate lines formed in the LCD panel, driving the plurality of gate lines. When the first gate driving circuit supplies a gate ON voltage to the Nth gate line, where N is a natural number, the second gate driving circuit supplies a precharge voltage to the (N+4n)th gate line, where n is a natural number.

Abstract: The LCD panel 101 of the present invention includes a panel side wiring 110 that electrically connects mutually adjacent source side drivers 102, 102 and a capacitor 106 connected to the panel side wiring 110. Therefore, by collectively fabricating the capacitor 106 on the LCD panel 101 together with LCD pixels in a step of fabricating the LCD pixels on the LCD panel 101, it becomes unnecessary to mount the capacitor 106 on the source side driver 102, and the cost of the source side driver 102 can be reduced.

Abstract: According to some embodiments, an apparatus, a system and a method are provided to reduce a backlit area of a display screen and resize an image to fit in the backlit area.

Abstract: Disclosed is a liquid crystal display device, a fabricating method, and a driving method thereof that includes at least one integrated photosensor that senses external light illumination on the liquid crystal display device. A sensing signal from the at least one photosensors are converted into a digital signal that is stored to represent an external illumination distribution. The liquid crystal display device includes a backlight that has a plurality of light sources that may be independently driven. A controller generates a control signal that independently drives the light sources in a manner corresponding to the illumination distribution. In doing so, areas of the liquid crystal display device may be provided with a greater amount of light from a corresponding light source so that externally illuminated areas of the liquid crystal display device do not suffer from reduced contrast.

Abstract: An apparatus for driving a backlight includes: a pulse width modulation signal phase shifting unit that shifts phases of at least one of red, green, and blue pulse width signal modulation signals so as to output at least one of phase-shifted red, green, and blue pulse width signal modulation signals; red, green, and blue light emitting diode arrays, each of which includes a plurality of light emitting diodes; and at least one light emitting diode driving unit driving one of the red, green, and blue light emitting diode arrays by using one of the phase-shifted red, green, and blue pulse width signal modulation signals.

Abstract: A light sensing circuit capable of enhancing a reliability by lowering a dependency on a temperature change without using a resistor, a backlight control apparatus having the same, and an LCD device having the same. The light sensing circuit includes a first MOS-transistor; and a second MOS-transistor serially connected to the first MOS-transistor between a first power terminal and a ground terminal, in which a second power terminal is connected to each gate terminal of the first MOS-transistor and the second MOS-transistor, and an optical amount detecting terminal is connected to a common connection point between a drain terminal of the first MOS-transistor and a source terminal of the second MOS-transistor.

Abstract: A liquid crystal panel brightness controller notifies a backlight controller that an illuminance of ambient light is equal to or less than a threshold value. Upon notification, the backlight controller causes invisible light emitted, for example. The invisible light passes through a liquid crystal panel and is reflected by an imaging target and is received by photosensors. Accordingly, the decrease in the amount of the visible light received by photosensors is compensated. As a result, an image with a high S/N ratio is obtained.

Abstract: A display device to display an image corresponding to image signals in a display area is provided. The display device includes a backlight including individually placed light sources corresponding to areas in the display area; a panel that includes pixels corresponding to the display area and that changes transmittance of light from the light sources in units of pixels; a panel control unit to individually set emission brightness of each of the light sources in accordance with the image signals and set the transmittance of light in each of the pixels in accordance with the emission brightness; a storage unit to store a nonlinear conversion table to convert the emission brightness to a light source control value for the backlight; and a backlight control unit to convert the emission brightness to the light source control value in accordance with the nonlinear conversion table and supply the light source control value to the backlight.

Abstract: A display device having an electrophoretic display panel that has two types of electrophoretic elements of different color and polarity disposed between electrodes, and changes display state according to an applied voltage, and a drive means for driving the electrophoretic display panel by applying a voltage between the electrodes.

Abstract: Systems and methods for driving a display of MEMS devices are disclosed. In one embodiment, a display device comprises an array of MEMS display elements, at least one test deflecting element, and a deflection sensing circuit connected to the test deflecting element, the deflection sensing circuit being configured to monitor deflection of the test deflecting element without actuating the test deflection element and to provide a signal indicative of one or more parameters affecting operation of the array of MEMS display elements based on the deflection.

Abstract: The present invention provides a method of generating haptic interface experiences that is capable of generating haptic companions to existing two-dimensional images. The method exploits the dominance of visual over haptic in humans: human tactile, proprioceptive, and kinesthetic senses do not supply as much fine detail as human vision, and consequently haptic representations do not have to be as detailed as the corresponding visual images to be believable to a human user. An existing two-dimensional image can be used as the visual component of a human-computer interface. A three-dimensional haptic model that is topologically similar to the image can be selected, where topological similarity means that the haptic model provides an acceptable approximation to important characteristics of the haptic experience desired to accompany the two-dimensional image.

Abstract: An electronic device is provided that includes a user-interface feature, a detection mechanism and one or more internal components. The user-interface feature is configurable to have a selected orientation about one or more axes. The detection mechanism can detect orientation information about the electronic device. The one or more components may select the orientation of the user-interface feature based on the detected orientation information.

Abstract: Provided are an input device with display buttons and a portable electronic device having the same. The input device with display buttons may include a button frame having at least one button window; a touch interface, which is disposed below the button frame and generates a signal by sensing a user's touch on each of the button windows; a display panel, which is disposed below the touch interface and provides an image corresponding to each of the button windows; and an operation feeling generator generating mechanical vibration in response to the signal input from the touch interface. The portable electronic device may include the input device with display buttons.

Abstract: A document processing system includes a first acquisition section, a storage section, a second acquisition section and a data processor. The first acquisition section acquires a position specified by a user in an actual document. The storage section stores layout data of the document and content data of the document associated with the layout data. The second acquisition section acquires data in the specified position from the content data of the document stored in the storage section, based on the layout data stored in the storage section and the specified position. The data processor processes the data acquired by the second acquisition section.

Abstract: A device including: an output device; a memory for storing first device movement data; a transmitter for sending to another communications device the first device movement data; a receiver for receiving second device movement data from the another communications device; and a processor operable to compare the stored first device movement data and the received second device movement data and to generate an output that depends upon the result of the comparison.

Abstract: A wireless cursor indicating device includes a first body and a second body combined with each other. The first body includes a containing space for containing a control circuit and a wireless receiver, and both sides of the first and second bodies include a sliding track and a sliding groove embedded with each other, and an elastic member and a limit member are embedded between the first and second bodies, so that the first and second bodies can be slid with respect to each other by means of the sliding track and sliding groove to define an OFF state or an ON state. With the operation of the elastic member and limit member, the first and second bodies in the ON state can be pulled by the elastic member without being disposed alternately, and only the containing space will be exposed for an easy access by users.