KR20080077723A - Display apparatus - Google Patents

Abstract

A display apparatus is provided to remove display error like image sticking by synchronizing an operation of an LCD(Liquid Crystal Display) cell with illumination operation of a beam source. A display apparatus includes a display module(100), an image processing unit(200), and a power supply unit(500). The display module includes a display panel for displaying images and at least one beam source for generating beams to the display panel. The image processing unit generates an image signal and a synchronous signal for synchronizing the image signal, and transmits the image and synchronous signals to the display panel. The power supply unit includes a voltage generator for generating a source voltage and a beam source driver which receives the source voltage and drives the beam source in order to synchronize with the synchronous signal.

Description

Display device {DISPLAY APPARATUS}

1 is a schematic block diagram illustrating a display device according to an exemplary embodiment of the present invention.

2 is a block diagram illustrating a synchronization connection method between a display panel and a light source according to an exemplary embodiment of the present invention.

3 is a block diagram illustrating a synchronization connection method between a display panel and a light source according to another exemplary embodiment of the present invention.

4 is a block diagram illustrating another embodiment of FIG. 3.

FIG. 5 is a block diagram illustrating in detail the power supply unit illustrated in FIG. 1.

6 is a block diagram illustrating a synchronization connection method between a display panel and a light source according to another exemplary embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

100: display panel 200: image processing unit

310: timing controller 400: light source

500: power supply unit 510: power generation unit

520: synchronization controller 530: power driver

Hsync: Horizontal sync signal Vsync: Vertical sync signal

sync_1: first control signal sync_2: second control signal

The present invention relates to a display device, and more particularly, to a display device for improving display quality.

In general, the liquid crystal display is a flat panel display that displays an image by using the light transmittance of the liquid crystal, and is thinner and lighter than other display devices, and has a low driving voltage and low power consumption. Is being used. The liquid crystal display includes a liquid crystal display panel that displays an image using light transmittance of the liquid crystal, and a backlight assembly disposed under the liquid crystal display panel to provide light.

In recent years, as the liquid crystal display device has been expanded to TV applications, development of a high-transmittance liquid crystal display panel has become important in securing performance and cost competitiveness in order to cope with the continuous price drop. In the case of improving the transmittance of the liquid crystal display panel, it is possible to reduce the cost of the backlight assembly which occupies the largest proportion of the material cost of the TV product and improve the power consumption characteristics. The backlight assembly for a TV uses a plurality of lamps as a light source.

On the other hand, in the liquid crystal display panel, gate lines and data lines that cross each other to define unit pixels and thin film transistors for switching the operation of the unit pixels are formed. Gate lines, data lines and the thin film transistor are formed through a photolithography process using an exposure mask.

In particular, in the four-mask process for reducing the number of manufacturing processes, the data wiring, the source metal pattern including the source and drain electrodes of the thin film transistor, and the channel layer are patterned using the same exposure mask. Accordingly, the active pattern is patterned under the source metal pattern in the same shape as the source metal pattern. In this case, the channel layer remains at a line width wider than the line width of the source metal pattern, so that the characteristics of the thin film transistor may be sensitively changed due to the luminance change of the backlight assembly.

Specifically, during the dimming operation of the backlight assembly, the amount of light generated continuously varies, and the change in the amount of light causes a change in the amount of charge charged in the unit pixel. As a result, in particular, in the liquid crystal display panel in the vertical alignment mode, the waterfall failure of the water flow shape is recognized.

On the other hand, in the case of a TV product to which the liquid crystal display panel of the vertical alignment mode is applied, if the polarity is the same between the lamps, waterfall defects are severe. Usually, liquid crystal display products for TVs design inverters to be driven with different polarities between neighboring lamps. As described above, for the reverse phase driving between the lamps, as the power balance board and the jumper using the double-sided printed circuit board are used, the manufacturing cost increases.

Accordingly, the technical problem of the present invention is to solve such a conventional problem, and an object of the present invention is to provide a display device which can improve display quality by synchronizing an operation signal of a light source with an operation signal of a display panel.

According to an aspect of the present invention, there is provided a display apparatus including a display panel for displaying an image and a display module having at least one light source for generating light to the display panel, and synchronizing the image signal and the image signal. A power source having an image processing unit for generating a synchronization signal, transmitting the power source to the display panel, a power generation unit for generating power, and a light source driving unit for receiving the power from the power generation unit and driving the light source to be synchronized with the synchronization signal; It includes a supply.

The power supply unit may be directly connected to the image processor to receive the synchronization signal.

The display module may further include a driving unit driving the display panel, and a timing controller connected to the image processing unit to generate a synchronous control signal for controlling the driving unit and the power supply unit to be synchronized with the synchronous signal. .

According to such a display device, by driving the light source to blink in synchronization with the operation of the display panel, it is possible to further eliminate the afterimage and the like and to improve the display quality of the display panel.

Hereinafter, with reference to the accompanying drawings, it will be described in detail the present invention.

1 is a schematic block diagram illustrating a display device according to an exemplary embodiment of the present invention.

Referring to FIG. 1, a display device according to an exemplary embodiment may include a display panel 100 displaying an image, an image processor 200 supplying an image input signal to the display panel 100, and a display panel 100. A driving circuit unit for driving the light source, a light source 400 for generating light to the display panel 100, and a power supply unit 500 for outputting a light source driving voltage for driving the light source 400. The driving circuit unit includes a timing controller 310, a data driver 320, and a gate driver 330. In addition, the light source 400 and the display panel 100 disposed above the light source 400 are integrated to form a display module.

The display panel 100 includes an array substrate on which a plurality of unit pixels defined by gate lines GL and a plurality of data lines DL intersecting the gate lines GL, and are coupled to the array substrate. It includes an opposing substrate for accommodating the liquid crystal layer. The unit pixel includes a thin film transistor TFT, which is a switching element connected to gate and data lines GL and DL, a liquid crystal capacitor CLC, and a storage capacitor CST electrically connected to the thin film transistor TFT.

As the display panel 100 has a gate voltage applied to the gate line GL and the thin film transistor TFT is turned on, a data voltage applied to the data line DL is applied to the liquid crystal capacitor CLC. The light transmittance of the liquid crystal capacitor CLC may be adjusted to display an image.

The image processor 200 processes the raw image signal input from the outside and controls the input of the image signals R, G and B DATA and the image signals R, G and B DATA. , Vsync, MCLK) are transmitted to the driving circuit unit. The image processor 200 converts the analog signal into a digital signal so that the display panel 100 of the digital display method can receive the digital signal. For example, the image processor 200 may include the input control signal including a main clock signal MCLK, a vertical synchronization signal Vsync, a horizontal synchronization signal Hsync, and a data enable signal DE, and an image signal ( R, G, B DATA) is transmitted to the timing controller 310.

For example, the frequency of the vertical sync signal (Vsync) of the display device applied to the TV application is about 60Hz for NTSC, about 50Hz for the PAL method, the frequency of the horizontal sync signal (Hsync) is about 48KHz in HD class FHD class is about 67KHz.

The timing controller 310 controls the operations of the display panel 100 and the light source 400. The timing controller 310 generates a data signal DAT by processing the image signals R, G, and B data input from the image processor 200, and processes the input control signal received from the image processor 200. To generate a gate control signal and a data control signal. The timing controller 310 provides the data control signal and the data signal DAT to the data driver 320, and provides the gate control signal to the gate driver 330.

The data driver 320 receives the data control signal to drive the data line DL. The data driver 320 converts the data signal DAT into corresponding analog data voltages, respectively, based on the data control signal and the gamma reference voltage VREF for grayscale control applied from the outside, to the data lines DL. Output to. The data control signal is applied to the horizontal start signal STH indicating the start of input of the data signal DAT, a load signal LOAD for applying a corresponding data voltage to each of the data lines DL, and the display panel 100. And an inversion signal RVS for inverting the polarity of the data voltage with respect to the common voltage VCOM.

The gate driver 330 receives the gate control signal to drive the gate line GL. The gate control signal includes a vertical start signal STV indicating the start of the output of the gate-on voltage Von, a gate clock signal CPV and a gate-on voltage Von controlling the output timing of the gate-on voltage Von. An output enable signal OE or the like that defines a duration.

The gate driver 330 sequentially turns on the thin film transistor TFT by outputting a gate-on voltage Von to the gate lines GL based on the gate control signal. Accordingly, the data voltages supplied to the data lines DL are applied to the corresponding pixels through the turned-on thin film transistor TFT.

In this manner, the gate-on voltage Von is sequentially applied to all the gate lines GL during one frame to apply the data voltage to all the unit pixels. The state of the inversion signal RVS applied to the data driver 320 is controlled so that the polarity of the data voltage applied to each unit pixel is opposite to that of the previous frame.

For example, the data driver 320 and the gate driver 330 drive a plurality of data driving chips for driving each group of data lines DL and drive a plurality of gates for grouping each of the gate lines GL. Made of chips. For example, the data and gate driving chip may be mounted on a separate printed circuit board, connected by a tape carrier package (TCP) method, or integrated in an outer region of the display panel 100.

The light source 400 supplies light to the display panel 100 and, for example, may include a plurality of elongated lamps. The plurality of light sources 400 are electrically connected in parallel and receive a driving voltage from the power supply unit 500. The display device may further include a plurality of optical sheets disposed above the light sources 400 to improve light utilization efficiency.

The power supply unit 500 changes the power applied from the outside to a driving voltage suitable for driving the light source 400 to drive the light source 400. For example, the power supply unit 500 may be configured as an LCD inverter power supply (LIPS) in which an inverter function is transferred to a switching mode power supply (SMPS).

The power supply 500 instructs the on / off operation of the light source 400 to generate a modulation dimming signal for controlling the brightness and a light source driving signal for oscillating the light source 400 to drive the light source 400. For example, the modulated dimming signal is generated as an integer multiple of the vertical frequency (Vsync) or an integer multiple of 0.5, and has a frequency value between about 150 Hz and 300 Hz. In one example, the frequency of the light source driving signal has a frequency value between about 30KHz ~ 60KHz.

As in an exemplary embodiment of the present invention, the power supply unit 500 may drive the light source 400 in synchronization with the synchronization signal Sync output from the image processor 200 or the timing controller 310. That is, the power supply unit 500 may implement an impulse lighting method, which is a method of blinking the light source 400 in synchronization with the operation of the liquid crystal layer of the display panel 100. Details thereof will be described later.

The power supply unit 500 may generate a gate driving voltage for driving the gate driver 330, for example, gate on / off voltages Von and Voff, or data driving for driving the data driver 320. A voltage, for example, a gamma reference voltage VREF that determines the transmittance of the unit pixel may be generated.

In addition, the display device of the present exemplary embodiment may further include a power stabilization unit 600 connected to the power supply unit 500. The power stabilization unit 600 is electrically connected to the plurality of light sources 400 in parallel to distribute the driving voltage evenly, and controls a uniform current to flow through the light source 400. In addition, the power stabilization unit 600 drives the light sources 400 in phase. That is, the power stabilization unit 600 drives the same phase so that the AC current flowing through the light sources 400 simultaneously has a minimum value and a maximum value.

Accordingly, it is possible to eliminate the change in the amount of light during the dimming operation of the power supply unit 500 or the wave pattern afterimage defect generated as the light sources 400 are driven in the same phase.

2 is a block diagram illustrating a synchronization connection method between a display panel and a light source according to an exemplary embodiment of the present invention.

1 and 2, as in an exemplary embodiment of the present invention, the power supply unit 500 receives the synchronization signal Sync from the image processing unit 200 to drive the light source 400. That is, by directly connecting the power supply unit 500 with the image processing unit 200 without passing through the driving circuit unit, a simple connection structure capable of all synchronization processing in the power supply unit 500 may be formed.

In detail, the image processor 200 is a timing controller 310 that controls the display panel 100 and controls the input including image signals R, G, and B data, and horizontal and vertical synchronization signals Hsync and Vsync. Apply a signal. At the same time, the image processor 200 applies horizontal and vertical synchronization signals Hsync and Vsync to the power supply 500.

The power supply unit 500 of the present invention includes a synchronization circuit for synchronously operating with the image processor 200, which is directly connected to the image processor 200. Accordingly, the power supply unit 500 may generate the light source driving signal and the modulation dimming signal to be synchronized with the synchronization signal Sync applied from the image processing unit 200, and output the light source driving voltage based on this. Details thereof will be described later.

On the other hand, as in the present embodiment, by driving the light source based on the synchronization signal (Sync) applied from the image processing unit 200, to remove the wave pattern afterimage defect that appears on the display screen when the light source 400 is in phase driving can do. In addition, as the light source 400 is driven in phase rather than reverse phase driving, the power stabilization unit 600 is designed using a single-sided printed circuit board, and a high voltage jumper for reverse phase driving is not used. Since it is not necessary, the manufacturing cost of the display device can be further reduced.

3 is a block diagram illustrating a synchronization connection method between a display panel and a light source according to another exemplary embodiment of the present invention.

1 and 3, the power supply unit 500 receives the synchronization signal Sync generated by the timing controller 310 to drive the light source 400. That is, the power supply unit 500 may be connected to the driving circuit unit including the timing controller 310 to perform synchronous operation.

In detail, the image processor 200 is a timing controller 310 that controls the display panel 100 and controls the input including image signals R, G, and B data, and horizontal and vertical synchronization signals Hsync and Vsync. Apply a signal. Based on this, the timing controller 310 generates various internal control signals including the gate and data control signals. In this case, the timing controller 310 uses the internal control signal generated based on the horizontal and vertical synchronization signals Hsync and Vsync applied from the image processor 200 to display the display panel 100 and the power supply 500. Can be synchronized.

As in this embodiment, the timing controller 310 generates the first control signal sync_1 in synchronization with the frequency of the horizontal synchronization signal Hsync, and the second control signal in synchronization with the frequency of the vertical synchronization signal Vsync. (sync_2) is generated and output to the power supply unit 500.

For example, the operation of the display panel 100 and the operation of the light source 400 may be synchronized using the gate control signal for controlling the gate driver 330. In detail, the frequency of the first control signal sync_1 is synchronized with the frequency of the horizontal synchronization signal Hsync, and the first control signal sync_1 controls the output timing of the gate-on voltage Von to control the gate line GL. It may be a gate clock signal (CPV) for sequentially driving them. In addition, the frequency of the second control signal sync_2 is synchronized with the frequency of the vertical synchronizing signal Vsync, and the second control signal sync_2 indicates the start of the output of the gate-on voltage Von so that the first gate line GL ) May be a vertical start signal STV.

Accordingly, the power supply unit 500 receives the first and second control signals sync_1 and sync_2, and synchronizes the frequency of the light source driving signal and the second control signal sync_2 with the frequency of the first control signal sync_1. The modulation dimming signal may be generated in synchronization with the driving signal, and the light source 400 may be driven based on the modulation dimming signal. Details thereof will be described later.

The power supply unit 500 of the present invention includes a synchronization circuit for synchronously operating with the timing controller 310, which is directly connected to the timing controller 310. For example, the timing controller 310 may be connected to the power supply unit 500 by connecting a separate connector to the printed circuit board on which the timing controller 310 is formed. Accordingly, the synchronization signals sync_1 and sync_2 from the timing controller 310 may be applied to the power supply unit 500.

4 is a block diagram illustrating another embodiment of FIG. 3.

1 and 4, the power supply unit 500 receives the synchronization signal Sync generated by the timing controller 310 to drive the light source 400. That is, the power supply unit may be connected to the driving circuit unit including the timing controller 310 to perform synchronous operation.

In detail, the image processor 200 is a timing controller 310 that controls the display panel 100 and controls the input including image signals R, G, and B data, and horizontal and vertical synchronization signals Hsync and Vsync. Apply a signal. Based on this, the timing controller 310 generates various internal control signals including the gate and data control signals. In this case, the timing controller 310 uses the internal control signal generated based on the horizontal and vertical synchronization signals Hsync and Vsync applied from the image processor 200 to display the display panel 100 and the power supply 500. Can be synchronized.

As in this embodiment, the timing controller 310 generates the first control signal sync_1 in synchronization with the frequency of the horizontal synchronization signal Hsync, and the second control signal in synchronization with the frequency of the vertical synchronization signal Vsync. (sync_2) may be generated and output to the image processor 200. For example, as in the above-described embodiment, the first and second control signals sync_1 and sync_2 may be signals synchronized with the gate clock signal CPV and the vertical start signal STV. Subsequently, the image processor 200 applies the first and second control signals sync_1 and sync_2 to the power supply 500.

Accordingly, the power supply unit 500 receives the first and second control signals sync_1 and sync_2, and synchronizes the frequency of the light source driving signal and the second control signal sync_2 with the frequency of the first control signal sync_1. The modulation dimming signal may be generated in synchronization with the driving signal, and the light source 400 may be driven based on the modulation dimming signal. Details thereof will be described later.

Meanwhile, the power supply unit 500 includes a synchronization circuit for synchronizing with the timing controller 310, and the synchronization circuit is connected to the image processor 200. For example, in order to output the sync signals sync_1 and sync_2 generated from the timing controller 310 to the image processor 200, the remaining pins of the connector receiving the input control signal from the image processor 200 may be used. . Accordingly, the synchronization signals sync_1 and sync_2 from the timing controller 310 may be applied to the power supply unit 500 through the image processor 200.

Meanwhile, referring to FIGS. 3 and 4, the power supply unit 500 generates a light source driving signal and a modulation dimming signal in synchronization with an internal control signal from the timing controller 310, and drives the light source 400 based on the power supply unit 500. As a result, the display operation of the display panel 100 and the flashing operation of the light source 400 may be synchronized. Accordingly, by matching the time point at which the light is emitted from the light source 400 with the time point at which the image is displayed on the display panel 200, the residual wave pattern generated due to the mismatch between the driving frequency and the frame frequency of the light source is removed. The display quality of the display device can be further improved.

FIG. 5 is a block diagram illustrating in detail the power supply unit illustrated in FIG. 1.

1 and 5, the power supply unit 500 includes a power generator 510 for generating power and a power driver for driving a light source by receiving power from the power generator 510. The power supply unit 510 is directly connected to the image processor 200 or the timing controller 310 to drive the light source 400 by receiving a synchronization signal Sync.

The power generator 510 converts an AC power applied from the outside into a DC power supply Vd and supplies a stable DC power supply Vd.

The power driver corresponds to the synchronization circuit for synchronizing the display panel 100 and the light source 400, and includes a synchronization controller 520 and a light source driver 530.

In the present embodiment, the synchronization controller 520 modulates the dimming signal dim indicating the luminance of the light source 400 so as to be synchronized with the applied vertical synchronization signal Vsync, and has a predetermined on / off duty ratio. Convert to and print it out.

In detail, the synchronization controller 520 generates a modulation reference waveform and generates a modulation dimming signal by performing pulse width modulation (PWM) on the dimming signal dim based on the modulation reference waveform. At this time, the synchronization controller 520 generates a modulation dimming signal in synchronization with the vertical synchronization signal Vsync.

The phase of the modulation dimming signal is divided into a section T1 maintaining a high level state and a section T2 maintaining a low level state, and the brightness of the light source 400 decreases as the ratio of T2 increases. The light source 400 is turned on / off by a modulation dimming signal having a frequency corresponding to T1 and T2. As such, the power supply unit 500 may adjust the brightness of the light source 400 by adjusting the on / off duty ratio of the dimming signal dim synchronized with the vertical synchronization signal Vsync.

The power driver 530 generates an on / off signal by performing on / off switching operation of the DC power source Vd applied from the power generator 510 in the turn-on period of the modulation dimming signal, and generates an on / off signal according to the on / off signal. A light source driving signal, which is an AC waveform of high voltage, is generated.

In this embodiment, the power driver 530 generates a light source driving signal through an on / off switching operation in synchronization with the horizontal synchronizing signal Hsync, thereby converting the DC power source Vd into an AC type light source driving voltage V_drv. Convert it and print it out. That is, the power driver 530 controls the oscillation timing of the light source 400 by synchronizing the frequency of the light source driving signal with the frequency of the horizontal synchronization signal Hsync.

In total, the power supply unit 500 synchronizes the modulation dimming signal for controlling the lighting timing of the light source 400 to the frequency of the vertical synchronization signal Vsync, and the oscillation of the light source 400 to the frequency of the horizontal synchronization signal Hsync. Synchronize the light source driving signal to determine the timing. That is, the frequencies of the horizontal and vertical synchronization signals Hsync and Vsync have the same or integer multiples as the frequencies of the light source driving signal and the modulation dimming signal, respectively.

In contrast, when the power supply unit 500 is connected to the timing controller, the modulation dimming signal for controlling the lighting time of the light source 400 is synchronized with the frequency of the second control signal sync_2, and the first control signal sync_1. Synchronize the light source driving signal to determine the oscillation timing of the light source 400 at the frequency of.

As such, as the light source 400 is driven to be synchronized with the synchronization signal Sync applied from the image processor 200 or the timing controller 310, the operation of the light source 400 may be controlled by the operation of the display panel 100. Can be synchronized. Accordingly, the light source 400 may be blinked in synchronization with the frame conversion of the display panel 100, and the light source 400 may be driven in synchronization with the plurality of horizontal scan signals constituting one frame.

The present invention is not limited to the illustrated method, and includes all driving methods capable of synchronizing driving the light source 400 by applying horizontal and vertical synchronization signals (Hsync, Vsync) to the power supply unit 500 or the inverter.

6 is a block diagram illustrating a synchronization connection method between a display panel and a light source according to another exemplary embodiment of the present invention.

1 and 6, as in another embodiment of the present invention, the display device includes a display panel 100 for displaying an image and an image processor for supplying an image input signal to the display panel 100 ( 200, a driving circuit unit for driving the display panel 100, a light source 400 for generating light to the display panel 100, an inverter 700 for outputting a light source driving voltage for driving the light source 400, and an inverter ( And a power supply unit 800 for supplying power to the 700. The driving circuit unit includes a timing controller 310, a data driver 320, and a gate driver 330, and the light source 400 and the display panel 100 disposed above the light source 400 are integrally displayed. Configure the module.

In the present embodiment, the inverter 700 receives the synchronization signal Sync from the timing controller 310 to drive the light source 400. That is, the inverter 700 may be connected to the timing controller 310 to synchronously drive the light source 400.

In detail, the image processor 200 is a timing controller 310 that controls the display panel 100 and controls the input including image signals R, G, and B data, and horizontal and vertical synchronization signals Hsync and Vsync. Apply a signal. In this case, the timing controller 310 may synchronize the display panel 100 and the inverter 700 by using the internal control signal generated based on the horizontal synchronization signals Hsync and Vsync applied from the image processor 200. have.

For example, the timing controller 310 generates the first control signal sync_1 in synchronization with the frequency of the horizontal synchronization signal Hsync, and the second control signal sync_2 in synchronization with the frequency of the vertical synchronization signal Hsync. May be generated and output to the inverter 700. For example, the first and second control signals sync_1 and sync_2 may be signals that are synchronized with the gate clock signal CPV and the vertical start signal STV.

Accordingly, the inverter 700 may control the flashing operation of the light source 400 based on the first and second control signals sync_2. For example, the inverter 700 may generate a light source driving signal in synchronization with the frequency of the first control signal sync_1 and a modulation dimming signal in synchronization with the frequency of the second control signal sync_2. For this reason, the inverter 700 converts the DC voltage Vd applied from the power supply unit 800 into an AC type light source driving voltage based on the light source driving signal and the modulation dimming signal, and outputs the light source 400 to the light source 400. can do.

In the above-described embodiments, the display device includes a power supply unit having an inverter function, that is, a power supply unit 500. The display device in this embodiment includes a power supply unit 800 and a power supply unit 800 that supply DC power. Inverter 700 separate from). In this case, the first and second control signals sync_1 and sync_2 for synchronously driving the inverter 700 are generated from the timing controller 310, and the inverter 700 directly does not go through the image processor 200 or the power supply unit 800. Can be applied to.

Accordingly, the inverter 700 receiving the synchronization signal in synchronization with the control signal from the timing controller 310 controls the blinking operation of the light source 400 in synchronization with the frame conversion operation of the display panel 100, thereby displaying the display. The display quality of the device can be further improved.

According to the display device, the driving frequency of the lamp and the PWM dimming signal are directly connected by directly connecting the image processing board and the power supply unit (LIPS) or inverter, or directly connecting the driving circuit unit of the display panel and the power supply unit (LIPS) or inverter. It can be synchronized with the horizontal and vertical frequencies of the image processing board respectively.

Accordingly, the display quality of the display device can be improved by synchronizing the operation of the liquid crystal cell of the display panel with the blinking operation of the light source and eliminating display defects such as wavy afterimages.

Although the detailed description of the present invention has been described with reference to the preferred embodiments of the present invention, those skilled in the art or those skilled in the art will have the idea of the present invention described in the claims to be described later. It will be understood that various modifications and variations can be made in the present invention without departing from the scope of the invention.

Claims (8)

A display module having a display panel for displaying an image and at least one light source for generating light to the display panel; An image processor for generating a synchronization signal for synchronizing the image signal and the image signal and transmitting the same to the display panel; And And a power supply unit having a power generation unit for generating power and a light source driving unit for receiving the power from the power generation unit and driving the light source to be synchronized with the synchronization signal. The display device of claim 1, wherein the power supply unit is directly connected to the image processor to receive the synchronization signal. The method of claim 2, wherein the synchronization signal comprises a horizontal and vertical synchronization signal, And the power supply unit drives the light source based on a light source driving signal synchronized with the frequency of the horizontal synchronization signal and a modulation dimming signal synchronized with the frequency of the vertical synchronization signal. The method of claim 1, wherein the display module A driving unit driving the display panel; And And a timing controller connected to the image processor to generate a synchronous control signal for controlling the driver and the power supply to be synchronized with the synchronous signal. The display device of claim 4, wherein the power supply unit is directly connected to the timing controller to receive the synchronization control signal. The display apparatus of claim 4, wherein the timing controller outputs the synchronous control signal to the image processor, and the power supply unit is connected to the image processor to receive the synchronous control signal. The method of claim 4, wherein the synchronization signal comprises a horizontal and vertical synchronization signal, The synchronization control signal includes a first control signal synchronized with the frequency of the horizontal synchronization signal and a second control signal synchronized with the frequency of the vertical synchronization signal, And the power supply unit drives the light source based on a light source driving signal synchronized with the frequency of the first control signal and a modulation dimming signal synchronized with the frequency of the second control signal. The display device of claim 1, further comprising a power stabilization unit connected to the power supply unit to drive the plurality of light sources in phase.

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