Abstract: By using a conductive layer including Cu as a long lead wiring, increase in wiring resistance is suppressed. Further, the conductive layer including Cu is provided in such a manner that it does not overlap with the oxide semiconductor layer in which a channel region of a TFT is formed, and is surrounded by insulating layers including silicon nitride, whereby diffusion of Cu can be prevented; thus, a highly reliable semiconductor device can be manufactured. Specifically, a display device which is one embodiment of a semiconductor device can have high display quality and operate stably even when the size or definition thereof is increased.

Abstract: The present disclosure provides a display device. The display device includes a controller and a display panel displaying an image. The controller includes a detector, a compensator, and a converter. The detector separates image data into first image data corresponding to a first image recognized as a non-afterimage component and second image data corresponding to a second image recognized as an afterimage component using a pre-trained deep neural network. The compensator outputs a compensation signal to control a luminance value of the second image data. The converter converts the first image data to first converted image data and converting the second image data to second converted image data based on the compensation signal.

Abstract: A display device and a method for driving the same are discussed. The display device includes an image processing unit, a timing controller which receives various signals through a mobile industry processor interface (MIPI) connected to the image processing unit, and a display module displaying an image under the control of the timing controller. The timing controller includes a logic block for controlling the display module, and a self-recovery block which outputs a self-command signal for escaping an abnormal state when the logic block is faced with the abnormal state due to an external environment factor.

Abstract: Disclosed is a level shifter that includes an input node; first and second voltage shifter circuits configured to generate an output clock of a second voltage domain in response to an input clock of a first voltage domain input via the input node, and an output node configured to output the output clock, wherein the first and second voltage shifter circuits have the same structure and are connected in parallel between the input node and an output node.

Abstract: The embodiments provide systems and methods for touchless sensing and gesture recognition using continuous wave sound signals. Continuous wave sound, such as ultrasound, emitted by a transmitter may reflect from an object, and be received by one or more sound receivers. Sound signals may be temporally encoded. Received sound signals may be processed to determine a channel impulse response or calculate time of flight. Determined channel impulse responses may be processed to extract recognizable features or angles. Extracted features may be compared to a database of features to identify a user input gesture associated with the matched feature. Angles of channel impulse response curves may be associated with an input gesture. Time of flight values from each receiver may be used to determine coordinates of the reflecting object. Embodiments may be implemented as part of a graphical user interface. Embodiments may be used to determine a location of an emitter.

Abstract: An autostereoscopic display device having touch sensing mechanism includes a display panel for illustrating images, a touch sensing panel for detecting touch events, a 2D/3D switching panel disposed between the display panel and the touch sensing panel, and a control unit. The 2D/3D switching panel has a substrate, a first electrode disposed on the substrate, a counter substrate, and a second electrode disposed on the counter substrate. The control unit is employed to provide a first control signal and a second control signal furnished to the first electrode and the second electrode respectively. The first control signal is switched between a first high voltage and a first low voltage in a gradual-shift manner. The second control signal is switched between a second high voltage and a second low voltage in a gradual-shift or rapid-shift manner.

Abstract: An object is to suppress change of a threshold voltage of a transistor in a shift register and to prevent the transistor from malfunctioning during a non-selection period. A pulse output circuit provided in the shift register regularly supplies a potential to a gate electrode of a transistor which is in a floating state so that the gate electrode is turned on during a non-selection period when a pulse is not outputted. In addition, supply of a potential to the gate electrode of the transistor is performed by turning on or off another transistor regularly.

Abstract: The disclosure relates to a system for controlling devices and information on a network by hand gestures, and more particularly, to a system for controlling devices and information on a network by hand gestures in which a device or a file to be controlled is selected by a user and a display device is pointed so that information and data can be shared and that various devices can be coupled to each other easily and can be controlled easily. The system for controlling devices and information on a network by hand gestures can remarkably improve the interaction between various input and display devices and a user under a ubiquitous computing environment.

Abstract: A driving method of a liquid crystal display panel having a source line and a counter electrode, includes driving the counter electrode to a first potential, driving the, counter electrode to a second potential being different from the first potential, setting the counter electrode and the source line to a third potential by short-circuiting the counter electrode and the source line to an interconnection having a potential between the first potential and the second potential, and driving the source line to a potential corresponding to an image data. The setting of the counter electrode and the source line to the third potential occurs in a period of one frame.

Abstract: A display device and a method of the driving the same include a display panel assembly, a driving unit which drives the display panel assembly, and a serial peripheral interface which includes a plurality of registers, the plurality of registers being divided into groups of at least two blocks, and which receives external driving signals through serial communications and thereby controls the driving unit.

Abstract: Disclosed herein is an image display device including a display section, a signal line driving circuit, and a scanning line driving circuit. The display section is formed by arranging pixel circuits in a form of a matrix. The signal line driving circuit is configured to output a driving signal for a signal line to the signal line of the display section. The scanning line driving circuit is configured to output a driving signal for a scanning line to the scanning line of the display section. The pixel circuits each include at least a light emitting element, a driving transistor configured to drive the light emitting element connected to a source by a driving current corresponding to a gate-to-source voltage, a storage capacitor configured to retain the gate-to-source voltage, and a writing transistor configured to set a terminal voltage of the storage capacitor by a voltage of the signal line.

Abstract: An object is to suppress change of a threshold voltage of a transistor in a shift register and to prevent the transistor from malfunctioning during a non-selection period. A pulse output circuit provided in the shift register regularly supplies a potential to a gate electrode of a transistor which is in a floating state so that the gate electrode is turned on during a non-selection period when a pulse is not outputted. In addition, supply of a potential to the gate electrode of the transistor is performed by turning on or off another transistor regularly.

Abstract: The invention concerns an electronic circuit for dynamic command of light sources in variable message information panels. It includes a number of elementary circuits consecutively connected between them, each having at least one LED connected through respective switchable branches, to a feed voltage, to a LED short-circuiting line, to a contiguous elementary circuit and to a component or a control circuit output. Thus, by commanding the switching elements through the control circuit several elementary circuits can be selectively configured as closed circuits, each of which having a chain of LEDs activated in dynamically variable numbers wherein the feed voltage is applied to the feed branch of the first active LED of the chain and the control circuit output is closed on the last active LED of the activated LEDs chain.

Abstract: A method and a circuit for controlling a power recovery stage of a plasma display panel including a resonant circuit of at least one inductive element and one capacitive element, wherein the capacitive element is precharged to half a supply voltage of the display panel.

Abstract: This invention provides an image display system that includes an image display device having an overdrive processing circuit and allows reduction in memory cost as a whole. The image display system according to this invention includes an image generation device that generates image data, and an image display device that receives the image data from the image generation device, performs overdrive processing based on the received image data, and displays an image. The image generation device includes a rendering circuit that generates image data to be outputted to the image display device for every frame, a memory unit that holds the plural pieces of image data corresponding to at least two frames among the plural pieces of image data generated by the rendering circuit, and a transfer circuit that transfers the plural pieces of image data corresponding to two frames among the plural pieces of image data held by the memory unit to the image display device within one frame period.

Abstract: A plasma display device having a first diode with an anode coupled to an electrode. A first switch is coupled between a cathode of the first diode and a first voltage source that supplies a first voltage. A first inductor and a second switch are coupled in series between a power recovery capacitor and the cathode of the first diode, and a third switch is coupled between the anode of the first diode and a second voltage source that supplies a second voltage lower than the first voltage.

Abstract: A driving method for driving an LCD panel having a counter electrode and a source line. In a first period, the counter electrode is driven to a potential VCOMH. In a second period, the counter electrode and the source line are short-circuited to a power supply interconnection having a power supply potential VCI. In a third period, the counter electrode is connected to a ground interconnection while the source line is kept to be short-circuited to the power supply interconnection. In a fourth period, the counter electrode is pulled down to a potential VCOML lower than a ground potential In a fifth period, the source line is driven to a potential corresponding to an image data while the counter electrode is kept to the potential VCOML. The electric power consumed in pulling down the counter electrode from a positive potential to a negative potential can be effectively reduced.

Abstract: A driving method of a light-emitting diode (LED) adapted to a driving apparatus is provided. The driving method includes receiving a dimming signal, detecting whether the driving apparatus performs dimming, and if the driving apparatus performs dimming, determining whether a duty cycle of the dimming signal is smaller than a predetermined value. When the duty cycle of the dimming signal is not smaller than the predetermined value, respective current magnitudes of a plurality of driving currents are regulated according to the dimming signal, and each of the driving currents is output for a full time of a period. Conversely, when the duty cycle of the dimming signal is smaller than the predetermined value, each of the driving currents is output for a partial time of a period. A driving apparatus employing the driving method is also provided.

Abstract: A PDP apparatus having a driving circuit in which a circuit for applying a rising-slope waveform in a reset period, a circuit for applying a falling-slope waveform, and a clamp circuit for generating a falling waveform having a dulled waveform between the rising-slope waveform and the falling-slope waveform are comprised. The clamp circuit comprises a bidirectional switch having two FETs, and a gate feedback circuit is connected to a gate portion of the FET at a panel side. The PDP apparatus reduces a current noise occurring in a sustain electrode throughout the panel when switching the rising-slope waveform and the falling-slope waveform, thereby solving problems such as an increase of unnecessary radiation and stress on elements such as FETs on the path.

Abstract: A method of manufacturing a three-dimensional viewing disk of the type that can viewed using a stereoscopic viewing device, such as the devices sold under the trademark VIEW-MASTER. The method enables the manufacturing of disks in small lots using conventional two-dimensional digital images with the addition of text that is viewed with a three-dimensional effect.

Abstract: A stable address discharge is caused by preventing an increase in the scan pulse voltage (amplitude) necessary for causing a stable address discharge, and thereby achieves high image display quality. For this purpose, the following operations are performed. The image display area of a plasma display panel is divided into a plurality of regions. In each region, the rate of the number of discharge cells to be lit with respect to the number of all discharge cells in each region is detected, as a partial light-emitting rate of each region, and the partial light-emitting rate is detected in each subfield. The region having the maximum partial light-emitting rate is detected and set as a first region. The regions adjacent to the first region are set as second regions, and a predetermined offset value is added to the partial light-emitting rates of the second regions so as to provide corrected partial light-emitting rates.

Abstract: A driving apparatus of a light emitting diode (LED) and a driving method thereof are provided. In the driving method, when the driving apparatus performs dimming and a duty cycle of a dimming signal is smaller than a predetermination value, outputting time of driving currents are equally allotted in a period, and a magnitude of each driving current is regulated correspondingly. When the driving apparatus performs dimming and the duty cycle of the dimming signal is equal to or greater than the predetermination value, the driving currents are simultaneously output in the period, and the magnitude of each driving current is regulated according to the dimming signal. Therefore, an audio noise and an electromagnetic interference caused by excessive variation of a sum of the driving currents are suppressed.

Abstract: A LCD device includes a LCD module, a thermal sensor, an operating device and a frame memory. The operating device includes first and second comparators, one-dimensional first to fourth lookup tables and an operator. The LCD device further includes a selector/data-generator which differentially generates an overdrive output and a prediction output according to outputs of the first comparator, the second comparator and the operator, depending on one of four conditions including a first condition that a start level and an end level are consistent; a second condition that a level of the output of the operator is greater than a predefined maximum; a third condition that the level is less than a predefined minimum; and a fourth condition that the level lies between the predefined maximum and the predefined minimum.

Abstract: An interactive media system configured to present a substantially real-time simulation of an actual live event involving a moveable object in an arena, the system comprising: a tag attachable to a moveable object involved in an actual live event in an arena; one or more base stations located relative to the arena and operable to receive a signal from the tag; a location platform configured to determine the location of the tag in the arena based on the signal received from the tag by the or each base station, and to output location data representing a location of the tag in the arena; a virtual world environment unit to simulate the actual live event including the arena, the object, and movement of the object in the arena using the location data for the tag; and an access interface in communication with the virtual world environment unit, the access interface being arranged to provide a user with access to the simulated arena and to permit the user to observe the simulated event in substantially real-time.

Abstract: A plasma display apparatus includes a plasma display panel having a plurality of sustain electrodes and a plurality of scan electrodes, a driver circuit to apply sustain pulses to the plurality of sustain electrodes and the plurality of scan electrodes to generate sustain discharges, and a control circuit to control the driver circuit such that a total light emitting pulse count defined as a total number of sustain pulses in one display frame is set equal to a predetermined pulse count defined as a function of a display load ratio, and such that the total light emitting pulse count is set lower than the predetermined pulse count upon detecting a predetermined condition, wherein the control circuit is configured to cause the driver circuit to selectively generate first sustain pulses with timing for clamping to a predetermined voltage being first timing and second sustain pulses with timing for clamping to the predetermined voltage being second timing, and configured to cause a ratio between a number of the fi

Abstract: An object is to suppress change of a threshold voltage of a transistor in a shift register and to prevent the transistor from malfunctioning during a non-selection period. A pulse output circuit provided in the shift register regularly supplies a potential to a gate electrode of a transistor which is in a floating state so that the gate electrode is turned on during a non-selection period when a pulse is not outputted. In addition, supply of a potential to the gate electrode of the transistor is performed by turning on or off another transistor regularly.

Abstract: A buffer circuit is driven with a low voltage and operates at a high speed has first and second comparators constituted by P channel and N channel MOS transistors provided between an input terminal and an output terminal of a buffer amplifier. A predetermined offset voltage is set for the comparing operation, and a switch circuit turns ON/OFF in response to an output signal from the first comparator and the output signal of the second comparator. A leading up of an output voltage from the buffer amplifier is accelerated by the current flowing from a power source line to the output terminal. The buffer circuit also includes an operation restricting circuit for restricting the comparing operation of the second comparator in a range of a dead band of the transistors.

Abstract: A backlight unit includes: a power supplying part; a non-dimming point light source receiving power from the power supplying part and providing a feed back signal to the power supplying part; a dimming control part outputting a dimming signal; and a plurality of dimming point light sources receiving power from the power supplying part, and receiving the dimming signal from the dimming control part.

Abstract: A LED dimming control circuit that avoids a higher output voltage than expected is provided. The LED dimming control circuit comprises an inductor, a transistor, a dimming control signal, a feedback signal, a switching control circuit, an error amplifier, and an inverted amplifier. The inductor and the transistor are coupled to a node. The switching control circuit is controlled by the dimming control signal and the feedback signal. The transistor is controlled by the switching control circuit. The output terminal of the error amplifier and the non-inverted input terminal of the error amplifier form a negative feedback path via the inverted amplifier.

Abstract: In one among many embodiments, the invention provides a system including an interrogator communicating to a selected one or more of a number of communications devices. A plurality of communications devices select random values independently of random values selected by other devices. The interrogator transmits a first signal requesting devices within a specified group of devices to respond, the specified group being less than or equal to all of the devices within a field of the interrogator. Devices receiving the first signal respectively determine if the respective device falls within the specified group and, if so, send a reply including a respective random value to the interrogator within a randomly selected time slot of a number of slots; and, if not, do not send a reply. The interrogator determines if a collision occurred between devices that sent a reply. The interrogator also creates a new, different specified group.

Abstract: According to one embodiment, a method for providing position feedback for a device includes providing a photointerrupter having a light-emitting diode, a phototransistor, and an aperture between the light-emitting diode and the phototransistor. For a given size aperture, a current through the phototransistor is a function of a current through the light-emitting diode. The method also includes controlling the current through the light-emitting diode current such that a change in the effective aperture size results in a desired approximately proportional change in current through the phototransistor. While controlling the current through the light-emitting diode, a portion of the aperture is blocked by an arm that has a position indicative of the position of the device. The method also includes providing a signal indicative of the change in current through the photodiode as an indication of the change in position of the device.

Abstract: There is provided a plasma display apparatus and a driving method of a plasma display panel. The plasma display apparatus comprises a plasma display panel comprising a first electrode and a second electrode, and an electrode driver alternatively applying a sustain pulse of a first polarity to the first electrode and the second electrode and applying a pulse of a second polarity opposite to a first polarity after a magnitude of a voltage of a sustain pulse of a first polarity is maximized. Therefore, it is possible to increase discharge efficiency without rising a driving voltage or increasing an electrode space by increasing an amount of space discharge.

Abstract: A plasma display device prevents interconnect wiring from breaking due to thermal deformation, and is thus suitable for high definition. The plasma display device includes a chassis base, a plasma display panel disposed in front of the chassis base to display an image, a circuit board disposed in back of the chassis base for driving the plasma display panel, and interconnect wiring connecting the circuit board to the plasma display panel. The plasma display device has a structure in which a ratio of a distance between an end of the circuit board and a curve apex of the interconnect wiring to a distance between a front end and a back end of the interconnect wiring is at least 0.25. As a result, the interconnect wiring is prevented from breaking due to thermal expansion of the plasma display panel and the chassis base.

Abstract: A plasma display device capable of realizing an interlace drive in one line display and an interlace drive in two lines display by switching thereof without deteriorating display quality, is provided. The interlace drive in one line display and the interlace drive in two lines display are realized such that: the interlace drive in one line display is performed by applying a sustain pulse for even display lines or odd display lines within a plasma display panel in each frame; and the interlace drive in two lines display is performed by applying the sustain pulse while setting the even display lines and the odd display lines adjacent above and below as one set and writing an identical data thereto. In addition, the all-cell reset is performed once per unit time at the interlace drive in two lines display, and an increase of background luminance is prevented by suppressing the increase in the number of times of the all-cell reset in the two lines display.

Abstract: An electro-optical device includes a substrate, a plurality of pixel portions disposed in a pixel area, a plurality of scanning lines and a plurality of data lines disposed in the pixel area, at least one scanning line drive circuit that supplies scanning signals to the plurality of scanning lines, and at least one reverse-direction control signal generating circuit that generates, based on a forward-direction control signal for controlling the scanning line drive circuit to supply the scanning signals to the plurality of scanning lines in a first order, a reverse-direction control signal for controlling the scanning line drive circuit to supply the scanning signals to the plurality of scanning lines in a second order, which is the reverse of the first order, and that supplies the forward-direction control signal and the reverse-direction control signal to the scanning line drive circuit.

Abstract: A backlight unit includes: a power supplying part; a non-dimming point light source receiving power from the power supplying part and providing a feed back signal to the power supplying part; a dimming control part outputting a dimming signal; and a plurality of dimming point light sources receiving power from the power supplying part, and receiving the dimming signal from the dimming control part.

Abstract: An ambient light processing system for controlling a display device by sensing ambient light and a method using the system. The ambient light processing system includes a photo-detector, an amplification unit, an analog-to-digital converter and a controller. The photo-detector outputs a sensed signal corresponding to the luminous intensity of the ambient light. The amplification unit amplifies the sensed signal with a high amplification factor to output a first amplified signal and amplifies the sensed signal with a low amplification factor to output a second amplified signal. The analog-to-digital converter respectively converts the first amplified signal and the second amplified signal into a first digital signal and a second digital signal. The controller outputs a first control signal and a second control signal for controlling the display device in response to the first digital signal and the second digital signal.

Abstract: In a plasma display panel driving method, a final voltage of a falling ramp voltage is reduced to a voltage for firing a discharge at all the discharge cells in a reset period. A difference between a voltage at an address electrode of a discharge cell to be selected and a voltage applied to a scan electrode is established to be greater than a maximum discharge firing voltage in an address period. A voltage greater than a sustain voltage is applied to the scan electrode so as to convert positive wall charges which can be formed on the scan electrode of a discharge cell which is not selected in the address period into negative wall charges.

Abstract: An object is to suppress change of a threshold voltage of a transistor in a shift register and to prevent the transistor from malfunctioning during a non-selection period. A pulse output circuit provided in the shift register regularly supplies a potential to a gate electrode of a transistor which is in a floating state so that the gate electrode is turned on during a non-selection period when a pulse is not outputted. In addition, supply of a potential to the gate electrode of the transistor is performed by turning on or off another transistor regularly.

Abstract: A PDP driving circuit for a stable operation of a ramp pulse. A capacitor having a temperature characteristic opposite to a temperature characteristic of a part coupled to a switch that operates as a constant current source for generation of a ramp pulse is arranged in the driving circuit for generating a ramp pulse. The ramp pulse linearly increases or decreases a panel voltage of the PDP with respect to time. Parts having opposite temperature characteristics are coupled in parallel to control variation of a gradient of the ramp pulse so that values of the parts may not be varied depending on the temperature changes. Thus, stable operation of the ramp pulse is obtained.

Abstract: A liquid crystal display of compact size is disclosed. The liquid crystal display has a signal transmission film and a single integrated PCB for processing a gate driving signal and data driving signal. The signal transmission film includes a base substrate, a gate driver IC formed on said base substrate, an input pattern formed on said base substrate that applies gate driving signals input from an external device to the gate driver IC, a first output pattern formed on said base substrate that outputs a first gate driving signal processed in said gate driver IC, and a second output pattern formed on said base substrate, that outputs a second gate driving signal bypassing the gate driver IC among the gate driving signals.

Abstract: A display panel includes a plurality of light guides which emit received light, and a plurality of external light blocking members which are disposed between exit surfaces of the plurality of light guides, and block light from the outside. Accordingly, the bright room contrast of the PDP is enhanced.

Abstract: The present invention relates to a plasma display panel, and more particularly, to an electrode structure of a plasma display panel capable of improving brightness and efficiency. According to a first embodiment of the present invention, in a plasma display panel of a long column structure having a front substrate and a rear substrate that are opposite to each other, the transparent electrodes of the scan electrodes or the sustain electrodes include projections projected toward the center of the discharge cells every discharge cell. Also, a discharge start voltage and a discharge sustain voltage can be lowered and brightness and efficiency can be increased. It is also possible to maintain color temperature equilibrium every RGB cell and to reduce an erroneous discharge of each cell.

Abstract: A plasma display panel is provided that includes scan electrodes, sustain electrodes, and address electrodes. A first pulse voltage for the address electrodes or a second pulse voltage for the address electrodes is applied to the address electrodes in an aging step in which aging discharge is performed by alternately applying pulse voltage for the scan electrodes and pulse voltage for the sustain electrodes at least across the scan electrodes and the sustain electrodes. The first pulse voltage has a rising edge timing synchronized with a rising edge timing of the pulse voltage for the scan electrodes and a pulse width smaller than that of the pulse voltage for the scan electrodes. The second pulse voltage has a rising edge timing synchronized with a rising edge timing of the pulse voltage for the sustain electrodes and a pulse width smaller than that of the pulse voltage for the sustain electrodes.

Abstract: A plasma display apparatus, in which a sustain output device (transistor) with a voltage rating in accordance with the sustain voltage can be used even when a voltage greater than the sustain voltage is applied to a sustain electrode in the reset period and the address period, has been disclosed, wherein, an X or a Y drive circuit, to which a voltage greater than the sustain voltage is applied, comprises a first switch provided between a second sustain drive transistor and the supply source of a second voltage, and the voltage is supplied to the sustain drive transistor in the state in which the first switch is open.

Abstract: A display apparatus having a displaying part, includes a video processing part to process an input video signal into a format which can be displayed on the displaying part, and a controlling part to determine whether a video image displayed on the displaying part is a still image, and if it is determined that the video image is the still image, to control the video processing part to display the video image according to the input video signal and a predetermined after-image prevention image alternately on the displaying part. Thus, the present general inventive concept provides a display apparatus which is capable of removing an after-image effect occurring in a display panel effectively, and a control method thereof.

Abstract: In a sequential driving method for time-divisionally displaying a plurality of color signals in respective ones of sub-frames forming one frame in a liquid crystal display apparatus including a plurality of data lines, gate lines, and liquid crystal pixels each including a liquid crystal cell and a switching element, black signals are written into all of the liquid crystal pixels at a beginning period of each sub-frame. Then, one color signal is sequentially written into rows of the liquid crystal pixels while the gate lines are sequentially selected. Finally, one backlight corresponding to one of the color signals is turned ON at an end period of each sub-frame. In this case, a level of pixel components of one color signal to be written into one row is compensated for, so that a change of an average transmittivity of each row is sufficiently small before the end period.

Abstract: A display device includes self-luminous elements arrayed to form a display screen, and a driving circuit which causes drive currents to flow in the self-luminous elements according to pixel signals. Particularly, the driving circuit is configured to restrict the drive currents flowing in the self-luminous elements upon increase in the total sum of the drive currents.

Abstract: A shining fan structure for displaying images of patterns or characters by reflection mainly includes a fan. A plurality of blades of the fan are provided with reflective patterns or characters. Light-emitting elements are provided on the periphery of the fan base. Each light-emitting element is angled to directly irradiate the front of the blade. When the fan rotates, the light-emitting elements provided on the periphery of the base irradiate the patterns or characters provided on the blades with the lightening frequency being synchronous with or different from the rotation speed of the fan, a shining effect can be seen from the front or side of the fan by reflection or transmission.

Abstract: The invention provides a display device which is capable of adjusting the image refresh rate to an optimal value regardless of the type of image data, and thus has low power consumption. The display device includes a liquid crystal panel for displaying images, a liquid crystal controller for refreshing images displayed in the liquid crystal panel according to an image data signal, and a CPU for inputting the image data signal to the liquid crystal controller. In the display device, the CPU has a discrimination section for discriminating whether the image data is a moving image or a still image based on an input interval of the image data from the CPU to the liquid crystal controller, and the liquid crystal controller has an image refresh demand signal generation circuit for changing the image refresh rate of the liquid crystal panel based on the result of discrimination by the CPU.