Abstract: A display device includes a plurality of pixels on a substrate including an insulating surface. Each of the plurality of pixels includes: a transistor above the insulating surface; a planarization film covering the transistor; a pixel electrode above the planarization film and electrically connected with the transistor; an insulating layer filled in a recess located around the pixel electrode between the pixels adjacent to each other; a light-emitting layer covering a surface of the pixel electrode and at least a part of a surface of the insulating layer; and a counter electrode above the light-emitting layer. A distance between a surface of the substrate and a face of the light-emitting layer in contact with the insulating layer is equal to or smaller than a distance between the surface of the substrate and a face of the light-emitting layer in contact with the pixel electrode.

Abstract: A sensing circuit for external compensation, a sensing method thereof and a display apparatus, the sensing circuit for external compensation comprises a differential amplifier (9), a first capacitor (4), a second capacitor (8) and an output voltage controlling circuit (10) for the first capacitor; a negative input terminal of the differential amplifier (9) is connected with a display panel (1), a positive input terminal thereof is connected with a reference voltage, and an output terminal thereof is connected with an output terminal of the output voltage controlling circuit (10) for the first capacitor; the output voltage controlling circuit (10) for the first capacitor is used for enabling an output voltage of the first capacitor (4) in a subsequent current integral stage to vary based on the reference voltage.

Abstract: Herein disclosed an image display including: row scan lines configured to supply a control signal; column signal lines configured to supply a video signal; and pixel circuits configured to be disposed at intersections between the scan lines and the signal lines, wherein each of the pixel circuits has at least a drive transistor, a sampling transistor connected to a gate of the drive transistor, a capacitive part connected between the gate and a source of the drive transistor, and a light-emitting element connected to the source of the drive transistor.

Abstract: An organic light emitting diode display includes: first gate wires provided on a substrate with a first insulation layer therebetween and extended in a first direction; second gate wires provided on a second insulation layer above the first insulation layer and extended in the first direction; data wires provided on a third insulation layer above the second insulation layer and extended in a second direction crossing the first direction; a pixel circuit connected to the first gate wires, the second gate wires, and the data wires; and an organic light emitting diode connected to the pixel circuit.

Abstract: The embodiments of the present disclosure disclose a pixel circuit, a driving method and a display apparatus. The pixel circuit comprises multiple sub-pixel circuits, one of which is arranged with a threshold compensation module, and shares a voltage compensated by the threshold compensation module with other sub-pixel circuits. According to the embodiments of the present disclosure, only a threshold compensation module may be arranged for multiple pixels, so as to reduce an average area occupied by a single pixel and is beneficial for improving the PPI of the display apparatus.

Abstract: The present disclosure provides a display device and a method for driving the same, which reduce or prevent a common voltage distortion phenomenon caused by a coupling phenomenon and thereby improve image quality.

Abstract: A display apparatus includes a plurality of light emitting elements, at least one common line, a power supply, a plurality of drive lines, and a controller. The at least one common line is connected to first ends of the plurality of light emitting elements. The plurality of drive lines are connected to second ends of the plurality of light emitting elements. The controller is to execute delay control on lighting possible periods in which the plurality of light emitting elements are to light in unit delay control periods so that an order of delaying the lighting possible periods in a single unit delay control period among the unit delay control periods is different from an order of delaying the lighting possible periods in any one of the unit delay control periods other than the single unit delay control period.

Abstract: A circuit is disclosed. The circuit includes a first transistor, to respond to a first scanning signal and to transmit a first voltage, a first capacitor, to store the first voltage, and an organic light emitting diode. The circuit also includes a second transistor, to provide a current to the organic light emitting diode, a third transistor, to respond to a second scanning signal and to transmit a first potential signal to the second transistor, and a fourth transistor, to respond to the first scanning signal and to form a diode connection of the second transistor. The circuit also includes a fifth transistor, to respond to a third scanning signal and to transmit a second signal voltage to the second transistor, and a sixth transistor, to respond to a light emitting scanning signal, and to output the current to the organic light emitting diode.

Abstract: A power conversion apparatus is provided with a plurality of DC-DC converters. Each of the DC-DC converters includes at least one gate resistor and a gate driver. The gate driver is configured to selectively connect a gate electrode of a switching element, via the gate resistor, with one of an on-potential point and an off-potential point. A gate resistor of a second DC-DC converter has a higher resistance than a gate resistor of a first DC-DC converter.

Abstract: The present invention provides an AMOLED pixel circuit. The third thin film transistor (T3) are located between the first, the second thin film transistors (T1, T2), and the control line (Control) is employed to input the control signal for controlling on and off of the third thin film transistor (T3), and thus controlling the AMOLED pixel circuit to measure the drive current with the current measurement circuit (1) and correcting the signal voltage with the signal voltage drive circuit (2), or displaying normally. The drive current entering the organic light emitting diode (D) in respective pixels can be corrected to solve the issues of unstable brightness and uneven display caused by the properties of the organic light emitting diode (D), which is changing along with the time and temperature, and to improve the display effect.

Abstract: Provided is a light emitting display device. The emitting display device comprises: a substrate including a plurality of pixels which are arranged in a first direction and a second direction that crosses the first direction, the plurality of pixels comprising a first main pixel block and a second main pixel block; a planarization pattern arranged on the substrate; a first electrode on the planarization pattern for each of the plurality of pixels; a pixel defining layer partitioning the respective pixels on the substrate and having an opening for exposing the first electrode; an organic layer on the first electrode; and a second electrode on the organic layer, wherein a thickness of the planarization pattern of the pixel in the second main pixel block is larger than a thickness of the planarization pattern of the pixel in the first main pixel block.

Abstract: Disclosed herein is a display apparatus, including, a panel having a plurality of pixels disposed in a matrix and each including a self-luminous element for emitting light, the panel including first to third conductive layers laminated in order on a supporting substrate, a first contact portion between the first and second conductive layers and a second contact portion between the second and third conductive layers being disposed at the same position in a planar direction.

Abstract: A touch panel and a method for fabricating the touch panel are presented. The touch panel includes a panel and a conductive border. A touch circuit is formed on a first side of the panel. A conductive border is formed on a circumference of the first side along the touch circuit. A method for fabricating the touch panel is further presented. The touch circuit of the touch panel is integrated onto the panel, so as to reduce the number of substrates that need to be bonded, thereby avoiding problems caused by substrate bonding and effectively decreasing the overall thickness of the touch panel.

Abstract: LED display modules for large-format displays are disclosed. The LED display module includes a matrix of LEDs, with each LED having an anode and a cathode, and an LED drive circuit having electrical connections defined by rows and columns that electrically connect to the LEDs in the LED matrix. Groups of adjacent rows are arranged in parallel and groups of adjacent columns are arranged in parallel, thereby defining super pixels each having an array of four or more LEDs, wherein the LEDs in a given super pixel cannot be individually activated. The modules can be combined to form the large-format display.

Abstract: An OLED panel having a plurality of OLED circuit elements is provided. Each OLED circuit element may include a fuse or other component that can be ablated or otherwise opened to render the component essentially non-conductive. Each OLED circuit element may comprise a pixel that may include a first electrode, a second electrode, and an organic electroluminescent (EL) material disposed between the first and the second electrodes. Each of the OLED circuit elements may not be electrically connected in series with any other of the OLED circuit elements.

Abstract: According to an aspect, a display device includes a display unit in which a plurality of pixels are arranged in a matrix along two directions intersecting with each other. Each of the pixels includes three sub-pixels corresponding to three of four colors including a first color, a second color, a third color, and a fourth color. An area of one sub-pixel among the three sub-pixels is larger than the area of each of the other two sub-pixels. A sub-pixel of the fourth color is one of the other two sub-pixels. Pixels each including the sub-pixel of the fourth color are not adjacent to each other in at least one of the two directions in the display unit.

Abstract: An organic light emitting display is driven in a simultaneous (or concurrent) emission scheme. The organic light emitting display includes: a display unit including a plurality of pixels coupled to scan lines, control lines, and data lines; a control line driver for providing control signals to the pixels through the control lines; and a power driver for applying a power at different levels to the pixels of the display unit during a plurality of periods of one frame. The control signals and the power are concurrently provided to the pixels included in the display unit.

Abstract: A pixel circuit for an organic light-emitting diode (OLED) display is disclosed. In one aspect, the pixel circuit includes a current provider electrically connected to a current source and configured to perform a current sinking operation in response to a first scan signal and to adjust a driving current based on the current sinking operation. The pixel circuit also includes a digital driver configured to control a flow of the driving current provided from the current provider in response to a data signal and a second scan signal. The pixel circuit further includes a plurality of pixel selectors configured to provide the driving current received from the digital driver to an OLED in response to a third scan signal.

Abstract: An organic light emitting display is provided which offers shorter sensing time and higher sensing accuracy when sensing variations in electrical characteristics of a driving element. The organic light emitting display can include: a display panel with a plurality of pixels; a gate driving circuit that generates a sensing gate pulse corresponding to one line sensing ON time in a sensing operation and sequentially supplies the same to gate lines in a line sequential manner; a data driving circuit comprising a plurality of current integrators that perform an integration of the source-drain current of the driving TFT of each pixel input through the sensing lines and an ADC that sequentially digitizes the output of the current integrators to output digital sensed values; and a timing controller that controls the operations of the gate driving circuit and data driving circuit.

Abstract: A pixel of an organic light emitting display includes first through fourth transistors and a capacitor. The first transistor operates based on a scan signal and is connected between a data line and a first node. The capacitor is connected between the first node and a second node. The second transistor operates based on a gate signal and is connected between a first power voltage and a third node. The third transistor operates based on compensation control line signal and is connected between the second node and the third node. The fourth transistor operates based on sensing control line signal and is connected between the data line and the third node. The organic light emitting element is connected between the third node and a second power voltage.

Abstract: Apparatus and associated methods relate to an electrical interface design architecture to independently excite each of a network of light strings and/or light string controllers with any of a number of independent excitation signals. In an illustrative example, each of the light strings may receive a selected one of the excitation signals conducted via a wiring assembly to an interface formed as a plug or a corresponding socket. In some embodiments, the interface may galvanically connect one or more of the excitation signals to a corresponding load according to user-selection of a relative orientation between the plug and the socket. In some implementations the load may include a down-stream controller that draws operating power through a selected one of the conductors at the interface. In various implementations, the interface may supply a load such as a multi-channel cable or single channel light string, for example.

Abstract: An organic light-emitting display device includes: an organic light-emitting panel defined into a plurality of pixel regions which each includes a drive transistor configured to drive an organic light emission element and a load capacitor configured to charge a threshold voltage of the drive transistor; and a controller configured to calculate an offset information on the basis of the threshold voltage and derive a second image signal by reflecting the offset information to a first image signal.

Abstract: An object of the invention is to improve the reliability of a light-emitting device. Another object of the invention is to provide flexibility to a light-emitting device having a thin film transistor using an oxide semiconductor film. A light-emitting device has, over one flexible substrate, a driving circuit portion including a thin film transistor for a driving circuit and a pixel portion including a thin film transistor for a pixel. The thin film transistor for a driving circuit and the thin film transistor for a pixel are inverted staggered thin film transistors including an oxide semiconductor layer which is in contact with a part of an oxide insulating layer.

Abstract: A switch mode power supply (SMPS) converter is periodically run backwards by using a synchronous switch instead of the normally used commutating diode. By running the SMPS converter backwards the SMPS output capacitor can be discharged very quickly to provide a fast turn off of (no current through) the LED's, thereby solving the color shift problem. This enables positioning the output voltage of the SMPS up or down by actively charging or discharging the bulk output capacitor. Having the capability of actively charging or discharging the bulk output capacitor allows generation of a current source comprising substantially square, e.g., substantially full current when on and substantially no current when off, current pulses that are preferable for driving LED lighting applications.

Abstract: An organic light emitting diode (OLED) display includes a substrate in which an emission area and a non-emission area are defined, an OLED disposed in the emission area. The OLED display further includes a thin film transistor disposed in the non-emission area, a first insulation layer overlapping the thin film transistor in the non-emission area, a first storage capacitance electrode disposed in the emission area on the first insulation layer, a second insulation layer disposed to cover the first storage capacitance electrode and the thin film transistor except a portion of the thin film transistor, said portion of the thin film transistor being exposed through the second insulation later. The OLED display further includes an organic protective layer disposed on the second insulation layer, and an anode electrode of the OLED disposed on the second insulation layer, the anode electrode electrically connected to the thin film transistor.

Abstract: Embodiments of the invention disclose an organic light-emitting diode array substrate and a manufacturing method thereof, and a display device. The array substrate comprises: a base substrate, a thin film transistor disposed above the base substrate, an organic light-emitting diode and a filling layer, the organic light-emitting diode including a first electrode, a second electrode, and an organic light-emitting layer disposed between the first electrode and the second electrode, wherein, in a light transmissive region of the organic light-emitting diode array substrate, the base substrate, the filling layer and the organic light-emitting layer of the organic light-emitting diode are disposed to be sequentially abutting.

Abstract: There is provided a material for an anode buffer lay which permits the use of an organic solvent as a solvent an anode buffer layer-forming solution, and is capable forming an anode buffer layer that does not dissolve even win coated with a luminescent layer-forming material solution containing an organic solvent as a solvent, and which is capable of producing an organic EL element having high electrical power efficiency and long life.

Abstract: A backplane for an electro-optic display comprising pixels with reduced capacitance. The pixel architecture results in a backplane with some voltage spiking, but well-suited for use with electro-optic media having at least a small threshold for switching, for example, electrophoretic media comprising particles.

Abstract: A light emission driver for a display device is disclosed. In one aspect, the driver includes a first node to which first and second light emitting power source voltages are applied according to respective clock signals. The driver also includes a second node to which the first and third light emitting power source voltages are applied according to the respective clock signals. The driver further includes first and second transistors respectively turned on by the first and second nodes and respectively transmitting the second and first light emitting power source voltages to a light emitting signal output terminal, respectively.

Abstract: A current source circuit includes current sources that are each configured to receive an external set signal and to control an output current value based on the external set signal. A changing over circuit that is electrically connected to the current sources and a set of output lines selects one of the current sources to be electrically connected to each of the output lines.

Abstract: Provided is a display device including a driving transistor, a switching unit, and a control unit. The driving transistor includes a control terminal, a first terminal, and a second terminal, and controls supply of current to a light emitting element, which is connected to the first terminal and emits light in accordance with the current amount, in accordance with a signal voltage applied to the control terminal. The switching unit can switch a conduction and non-conduction state, and, by being brought in the conduction state, forms a path that bypasses the light emitting element so that the current is not supplied to the light emitting element. The control unit performs control so that the switching unit is brought in the non-conduction state after the signal voltage is written into the control terminal, and controls a potential of the control terminal in synchronization with the control of the switching unit.

Abstract: An electroluminescent display and a method of driving the same are disclosed. In one aspect, the display includes a display panel including a plurality of pixel units electrically connected to a plurality of data lines and a plurality of gate lines. The pixel units are arranged in a matrix of a plurality of rows and a plurality of columns, the pixel units in the same column are connected to the same data line, and the pixel units in the same diagonal line of the matrix are connected to the same gate line. The display also includes a data driver located at a first side of the display panel, the data driver being configured to drive the data lines, and a gate driver located at the first side of the display panel and configured to drive the gate lines.

Abstract: An electronic device package including a substrate, a base film, a first seal, an electronic device and a second seal is provided. The first seal is disposed between the substrate and the base film and partially exposed by the base film. The electronic device is formed on the base film. The second seal disposed on the electronic device includes absorbents. A part of the second seal adheres to a part of the first seal exposed by the base film. The first seal and the second seal encapsulate the base film and the electronic device. The first seal and the second seal are the same host materials. A packaging method of an electronic device package is also provided.

Abstract: An object of the present invention is to provide a light emitting device that is able to suppress power consumption while a balance of white light is kept, without making a configuration of a power source circuit complicated. A power source potential corresponding to each color of a light emitting element is used as a higher electric potential of a video signal and an electric potential of a power source line in the case that a transistor for controlling a supply of electric current to the light emitting element is a p-channel TFT. Conversely, a power source potential corresponding to each color of a light emitting element is used as a lower electric potential of a video signal and an electric potential of a power source line in the case that a transistor for controlling a supply of electric current to the light emitting element is an n-channel TFT.

Abstract: In view of the problem that a reduced thickness of an EL film causes a short circuit between an anode and a cathode and malfunction of a transistor, the invention provides a display device that has a light emitting element including an electrode and an electroluminescent layer, a wire electrically connected to the electrode of the light emitting element, a transistor provided with an active layer including a source, a drain and a channel forming region, and a power supply line electrically connected to one of the source and the drain of the transistor, wherein the wire is electrically connected to the other of the source and the drain of the transistor, and the width of a part of the electrode in the vicinity of a portion where the electrode is electrically connected to the wire is smaller than that of the electrode in the other portion.

Abstract: The present invention discloses a pixel compensation circuit and method for an organic light emitting display. The circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a driving transistor, a capacitor, and an organic light emitting element. The first transistor transmits a data signal to a first plate of the capacitor; the second transistor applies a reference voltage to the first plate of the capacitor; the driving transistor determines a magnitude of a driving current; the third transistor establishes a connection between the gate electrode and the drain electrode of the driving transistor; the fourth transistor passes the driving current from the driving transistor to the organic light emitting element; and the organic light emitting element emits light in response to the driving current.

Abstract: A display drive circuit formed in a chip manufactured by a chip on glass implementation, which is connected to lead lines formed on a glass substrate, includes a rectangularly-shaped substrate, a power supply line formed on the substrate, the line being elongated along the longer side of the rectangular shaped substrate, a plurality of output terminals formed on the rectangular shaped substrate, the output terminal being disposed along the power supply line, a plurality of bump electrodes, each of which connects one of the output terminal to one of the lead lines, switches disposed along the power supply line, each of which is connected between the one of the output terminals and the power supply line, a single power supply terminal, which is disposed near the middle of the power supply line, being connected to the power supply line.

Abstract: A backlight assembly includes a plurality of first light sources configured to emit a first color, and a plurality of second light sources configured to emit a second color different from the first color, where the backlight assembly is divided in a first boundary area, a second boundary area spaced apart from the first boundary area in a first direction, and a middle area between the first boundary area and the second boundary area, and an arrangement direction of first and second light sources of the plurality of first and second light sources in the first and second boundary areas is different from an arrangement direction of first and second light sources of the plurality of first and second light sources in the middle area.

Abstract: A color filter substrate, a display panel and a display device are provided. The color filter substrate includes a substrate and a color filter layer provided on the substrate. The color filter layer includes a plurality of pixel units in a matrix form, each of the pixel units includes at least three subpixels in different colors, and each of the subpixels includes a sub-subpixel in one color. Within each of the pixel units, areas of the sub-subpixels are inversely proportional to wavelengths that the sub-subpixels correspond to.

Abstract: A rectifier rectifies an alternating current power to obtain a direct current power. The rectifier sends the direct current power to a driving power and carrier signal generation apparatus. The driving power and carrier signal generation apparatus generates a driving power. The driving power and carrier signal generation apparatus sends the driving power through a transmission line to at least a light emitting diode driving apparatus to drive at least a light emitting diode. The driving power and carrier signal generation apparatus generates a carrier signal. The driving power and carrier signal generation apparatus sends the carrier signal through the transmission line to the light emitting diode driving apparatuses. The light emitting diode driving apparatuses drive the light emitting diodes according to the carrier signals.

Abstract: A liquid crystal display device in which pixels having a memory function are arranged includes: a display drive unit performing display driving by a driving method for obtaining halftone gray scales by setting plural frames as one cycle and temporarily changing gray scales of respective pixels within one cycle; and a pixel drive unit supplying a voltage having the same phase as, or the reverse phase to, a common voltage the polarity of which is inverted in a given cycle and applied to counter electrodes of liquid crystal capacitors to pixel electrodes of the liquid crystal capacitors. The pixel drive unit supplies an intermediate voltage between high- and low-voltage sides of the common voltage to the pixel electrodes of the liquid crystal capacitors at the time of transition from the supply of the voltage having the same phase to the supply of the voltage having reverse phase.

Abstract: A gate drive circuit to drive a gate terminal of a power transistor. The gate drive circuit includes a first capacitor, a first switch, a measurement circuit and a reference source to generate a reference voltage. The first capacitor has a first terminal electrically coupled to the gate terminal of the power transistor. The first switch is arranged between a second terminal of the first capacitor and a first predetermined voltage. The measurement circuit is used to measure a differential voltage across the first capacitor. The gate drive circuit is configured to pre-charge the first capacitor to obtain a second predetermined voltage across the first capacitor. The gate drive circuit is further configured to arrange the first switch in an on state to turn on the power transistor and to electrically couple the first predetermined voltage to the second terminal of the first capacitor. The first capacitor is initially pre-charged at the second predetermined voltage.

Abstract: An OLED display and a method of manufacturing the same are disclosed. In one aspect, the display device includes a plurality of pixels, wherein each of the pixels includes a plurality of wires including a first wire extending in a first direction and a second wire extending in a second direction crossing the first direction, the second wire having top and bottom portions opposing each other. The pixels also include a plurality of switching TFTs electrically connected to the wires, a driving TFT configured to supply a driving current, a storage capacitor electrically connected to the wires and the driving TFT, and a connecting wire electrically connecting the driving TFT to a selected one of the switching TFTs, wherein the connecting wire has top and bottom portions opposing each other, and wherein at least the top portions of the connecting wire and the second wire are formed on different layers.

Abstract: Provided are an AMOLED pixel unit, a method for driving the same, and a display device. The AMOLED pixel unit includes a compensating unit, a light emitting control unit, a driving transistor, a storage capacitor and an organic light emitting diode, wherein the compensating unit is switched on under the control of a signal on a scan line; the light emitting control unit is switched on under the control of a signal on a light emitting control line; an anode of the organic light emitting diode is connected to a second terminal of the storage capacitor, and a cathode of the organic light emitting diode receives a second power supply signal. Such a circuit can effectively compensate for the drift and the non-uniformity of the threshold voltages of the transistors and the non-uniformity of the voltages of the organic light emitting diodes.

Abstract: An apparatus comprises a first light sensor configured with a first field of view; and a second light sensor configured with a second, narrower field of view contained within the first field of view. The first and second light sensors may be arranged to detect light reflected from an illuminated surface, wherein the first and second field of view encompass light from an electric lighting device reflected from said surface and additional light reflected from said surface, e.g. natural light; but the second light sensor is concentrated on a region on said surface so as to exclude glare from objects outside said region, whereas the first field of view extends beyond said region. An illumination level of the environment in which the apparatus is installed may be adjusted to compensate for a change in the additional light based on information distinguishing between the two sensors.

Abstract: The present disclosure relates wireless power transfer. In some embodiments, DC power is received through one or more inductors and switched to provide alternating current through a TX coil with a pair of power FETs coupled between opposite sides of the TX coil and ground such that current flows through one of the pair of FETs at a time. In some embodiments, the pair of FETs can be driven in adaptive resonant mode to operate at a resonance. In some embodiments, the pair of FETs are driven at a particular frequency.

Abstract: A light emitting module including a substrate, a plurality of first light emitting diode (LED) chips and a plurality of second LED chips is provided. The substrate has a cross-shaped central region and a peripheral region surrounding the cross-shaped central region. The first LED chips are disposed on the substrate and at least located in the cross-shaped central region. The second LED chips are disposed on the substrate and at least located in the peripheral region. A size of each second LED chip is smaller than a size of each first LED chip. The number of the first LED chips located in the peripheral region is smaller than that in the cross-shaped central region. The number of the second LED chips located in the cross-shaped central region is smaller than that in the peripheral region.

Abstract: An optoelectronic device includes a first transistor, a second transistor, and a control circuit. The first transistor is electrically connected between a power supply and a light-emitting element, has a gate to receive a gray scale voltage, and supplies the light-emitting element with a driving current corresponding to the gray scale voltage. The second transistor has a gate electrically connected to an electrode of the light-emitting element and a source or drain electrically connected to a circuit including a voltmeter. The control circuit reads a measurement value of the voltmeter when the gate of the first transistor receives the gray scale voltage, and corrects a next gray scale voltage applied to the gate of the first transistor based on the measurement value.

Abstract: A display device according to an embodiment of the present invention includes: a pixel configured to emit light according to a data signal supplied to a data line, a power source voltage supplier configured to supply a power source voltage to the pixel, a driving transistor configured to drive the pixel to be emitted according to the data signal and the power source voltage, and a sensor configured to supply a test signal to a data line and to detect a sensing current flowing to the data line through the driving transistor according to the test signal.

Abstract: An image adjusting method, a light source module, and an electronic device are provided. The image adjusting method includes the following steps. A first set of light source and a second set of light source of the light source module are driven independently by corresponding driving intensity respectively. An image display command is received. The driving intensity corresponding to the first set of light sources and the second set of light sources respectively are adjusted according to the image display command, wherein a gamut of the first set of light sources is wider than that of the second set of light sources, and luminous efficacy of the second set of light sources is higher than that of the first set of light sources.