KR20160067260A - Display device with multiple operating mode and timing controller - Google Patents

Abstract

The present invention relates to a display device with multiple operating modes and a timing controller. The prevent invention provides a display device which includes a backlight unit which includes a light source part which emits light to a display panel including pixel regions and a light driving part which controls the light source part, and a timing controller which controls a data driving and a gate driving part which provide signals to the display panel, and controls the operation of the light source driving part in one of a first driving mode and a second driving mode. So, the quick booting of the display device can be implemented.

Description

DISPLAY APPARATUS AND TIMING CONTROLLER WITH MULTI-DRIVE MODE [0002] DISPLAY DEVICE WITH MULTIPLE OPERATING MODE AND TIMING CONTROLLER [0003]

The present invention relates to a display device and a timing controller having multiple driving modes.

2. Description of the Related Art [0002] As an information-oriented society develops, there have been various demands for a display device for displaying images. Recently, a liquid crystal display (LCD), a plasma display panel (PDP) Various display devices such as an organic light emitting display (OLED) device are being used. Such various display apparatuses include display panels corresponding thereto.

On the other hand, the display panel can operate in combination with various devices such as a TV, a tablet, and a computer, and requires a quick booting of a display panel or a display device.

In view of the foregoing, it is an object of the present invention to provide various driving modes for quick booting of a display device.

It is an object of the present invention to provide a fast boot speed by differentiating a power source applied to a component under various driving modes.

Further, the objects of the present invention are not limited thereto, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

According to an embodiment of the present invention, there is provided a display device including a backlight unit including a light source unit for outputting light to a display panel including a plurality of pixel regions and a light source driver for controlling the light source unit, And a timing controller for controlling the data driver and the gate driver to control the light source driver to operate in either the off mode, the first drive mode or the second drive mode.

In another aspect, the present invention includes a mode control unit for controlling a data driver and a gate driver for providing a signal to a display panel and for providing a signal indicating an off mode, a first drive mode or a second drive mode to the backlight unit controller And a timing controller.

As described above, according to the present invention, two or more drive modes are provided for quick booting.

In addition, according to the present invention, various power sources can be set to various components in the timing controller and the backlight unit under various driving modes to increase the booting speed of each component.

1 is a view schematically showing a display device according to embodiments.
2 is a diagram showing an operation sequence of the timing controller.
3 is a view showing an operation sequence of the light source driving unit and the light source unit.
4 is a diagram illustrating switching between the modes according to an embodiment of the present invention.
5 is a diagram illustrating a sequence of switching between a first drive mode and a second drive mode according to an embodiment of the present invention.
6 is a diagram showing in more detail the operation of the timing controller according to an embodiment of the present invention.
FIG. 7 is a diagram illustrating an operation process in a portion 700 of FIG.
FIG. 8 is a detailed diagram illustrating an operation of the light source driving unit according to an embodiment of the present invention.
FIG. 9 is a view showing an operation process in the portion 900 of FIG.
10 is a diagram showing a configuration of a timing controller and a backlight unit according to an embodiment of the present invention.
11 is a flowchart illustrating a process of displaying data black in a data driver or a gate driver of a timing controller according to an embodiment of the present invention.
12 is a diagram illustrating a process of controlling a backlight unit by a timing controller according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In the drawings, like reference numerals are used to denote like elements throughout the drawings, even if they are shown on different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the components from other components, and the terms do not limit the nature, order, order, or number of the components. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; intervening "or that each component may be" connected, "" coupled, "or " connected" through other components.

1 is a view schematically showing a display device according to embodiments. In one embodiment, the liquid crystal display device may be a liquid crystal display device.

Referring to FIG. 1, a display device 100 according to an embodiment includes a plurality of first lines VL1 to VLm formed in a first direction (e.g., a vertical direction) A display panel 110 on which a plurality of second lines HL1 to HLn are formed, a first driver 120 for supplying a first signal to a plurality of first lines VL1 to VLm, A timing controller 140 for controlling the first and second driving units 120 and 130 and a backlight unit 150 for supplying a second signal to the first and second lines HL1 to HLn, And the like.

The display panel 110 is provided with a plurality of first lines VL1 to VLm formed in a first direction (e.g., a vertical direction) and a plurality of second lines HL1 to HLn formed in a second direction (e.g., A plurality of pixels (P) are defined according to the intersection of the pixels.

Each of the first driving unit 120 and the second driving unit 130 may include at least one driver IC for outputting a signal for displaying an image.

A plurality of first lines VL1 to VLm formed in the first direction on the display panel 110 are formed in a vertical direction (first direction) to transmit a data voltage (first signal) And the first driver 120 may be a data driver for supplying the data voltage to the data line.

A plurality of second lines HL1 to HLn formed in the second direction on the display panel 110 are formed in a horizontal direction (second direction) to form a gate signal (first signal) And the second driver 130 may be a gate driver for supplying a scan signal to the gate line.

In addition, a pad portion is formed on the display panel 110 to connect the first driver 120 and the second driver 130. When the first driver 120 supplies a first signal to the plurality of first lines VL1 through VLm, the pad unit transmits the first signal to the display panel 110 and the second driver 130 similarly applies a plurality of second lines HL1 to HLn), and transmits the second signal to the display panel (110).

A component for supplying power is coupled to the outside of the display panel 110. The display panel 110 may be a large display panel or may be provided with a power supply to the display panel 110 to supply power evenly even if it is not a large display panel.

1 is a liquid crystal display, the display panel 110 includes a TFT-array substrate on which a thin film transistor (TFT) is formed, a color filter (CF) Are spaced apart from each other by a predetermined gap (Cell Gap), and liquid crystal is injected between the TFT-array substrate and the color filter substrate.

The driving circuit unit includes a timing controller 140, a first driving unit 120 and a second driving unit 130 for generating an electric signal for controlling the plurality of driver ICs and controlling a digital data signal input from the outside, A plurality of driver ICs for operating the liquid crystal display panel 110, and a printed circuit board (PCB) having various circuit elements.

Here, the plurality of driver ICs includes at least one gate driver IC and at least one data driver IC.

These multiple driver integrated circuits are connected to the TFT-array substrate.

As a method of connecting the driver IC to the TFT-array substrate, there is a method of mounting a driver integrated circuit on a film to form a Tape Carrier Package (TCP) mounting system using TAB (Tape Automated Bonding) And a COG (Chip On Glass) mounting method in which a bonding pad formed on a substrate is directly connected. In addition, any method can be used as long as the driver integrated circuit is electrically connected to the TFT-array substrate 111 Do.

In the case of a liquid crystal display, the display device may further include a backlight unit 150. A backlight unit (BLU) may include a backlight unit for controlling a plurality of light sources, for example, LEDs, from the timing controller 140 And receives a light source driving signal PWM to drive a plurality of light sources. Components of the backlight unit 150 include a light source driving unit that receives a control signal from the timing controller 140 and a light source unit that outputs light. Hereinafter, the backlight unit includes a light source driving unit and a light source. Examples of the light source include a light emitting diode (LED), an external electrode fluorescent lamp (EEFL), a cold cathode fluorescent lamp Lamp, CCFL), a laser diode, and the like, but the present invention is not limited thereto. The backlight unit 150 may be a direct BLU (Backlight Unit) or an edge BLU according to a method of installing a light source, but the present invention is not limited thereto. The light source driving unit operates the light source unit, and an LED driver or the like may be an embodiment of the light source driving unit.

2 is a diagram showing an operation sequence of the timing controller.

When the timing controller 140 receives power from the outside, the timing controller 140 advances the work required for the operation, and applies the ON signal to the backlight unit 150. When the timing controller 140 receives a data signal Vx1 Data as shown at 210, the timing controller 140 performs an operation required for the booting of the timing controller 140 for a time T1 and then transmits an LED_ON signal to the light source driver of the backlight unit 150 220 as shown in FIG. T1 may be variously configured according to the characteristics of the display device, the structure of the timing controller, and the like, and is 400 ms in one embodiment.

3 is a view showing an operation sequence of the light source driving unit and the light source unit.

Reference numeral 310 denotes a sequence in which the light source driver receives power from an external timing controller, and reference numeral 320 denotes a sequence in which the light source driver operates. And 330 shows the sequence in which the light source operates. During the time T2, the light source driver proceeds to stabilize the power and then proceeds to boot. After booting for the period T3, the light source unit is controlled such that the light source of the backlight unit is turned on. When the light source unit is turned on, light is emitted from the backlight unit and a screen is displayed on the display unit.

T2 and T3 may also be variously configured according to the characteristics of the backlight unit or the structure of the light source driving unit. In one embodiment, T2 may be 500 ms and T3 may be 400 ms.

In FIGS. 2 and 3, the delay time required for turning on the light source of the backlight unit after the timing controller is powered from the outside is about 900 ms to 1300 ms, which increases the initial driving time of the display device have. Also, if the loading time of the system is combined during the assembly of the set, the delay time may increase. Also, a delay time occurs due to the loading time of the timing controller and the light source driving unit. This is because the circuit is reset and must be loaded from the beginning in the process of turning on / off. Therefore, when the timing controller and the light source driving unit are frequently turned on / off, there is a problem that the timing controller and the light source driving unit must be repeatedly loaded. Accordingly, it is necessary to reduce the initial driving time in driving each of the timing controller and the light source driving unit. Hereinafter, the present invention provides a configuration of a backlight unit and a timing controller for reducing initial driving time. Also, in order to shorten the initial driving time, the present invention provides various driving modes. That is, the drive mode distinguished on / off can be distinguished into drive modes having different drive times, and the drive time can be flexibly applied according to the characteristics of each drive mode.

In one embodiment of the present invention, in order to reduce the initial driving time, the display device has two kinds of driving modes. Table 1 summarizes each driving mode.

[Table 1] Driving mode and off mode

In Table 1, the first drive mode means a mode in which an image is output to the display device. Means a conventional on mode. The second driving mode means a mode in which an image is not output to the display device, but the power is supplied to the light source driving unit and the timing controller. In the second drive mode, there is no image output by the display device, and the external mode is the same as the OFF mode, which is in the off state. However, since the light source driving unit and the timing controller are in operation, switching to the first drive mode is easy. The data provided by the timing controller in the second driving mode is "DATA BLACK" which means black color, not image data of various colors, which is an example of emitting black so as to recognize that the screen is turned off . Since the second drive mode exists in the intermediate stage between the first drive mode and the off mode, when the second drive mode is switched to the first drive mode, the light source driver And the time required to load the timing controller can be reduced.

4 is a diagram illustrating switching between the modes according to an embodiment of the present invention. The switching between the modes may be performed according to an external signal or an internal determination module of each device, but the present invention is not limited thereto. In addition, the portion that can be switched between the respective modes can be limitedly applied according to the embodiment.

Reference numeral 410 denotes a state in which the display device is in a first drive mode, reference numeral 420 denotes a state of the display device in a second drive mode, and reference numeral 430 denotes a state in which the display device is in an off mode. The first drive mode is a state in which an image is output to the display device. In the second drive mode, no image is output to the display device, but power is applied to the light source driver and the timing controller.

As shown in FIG. 2 and FIG. 3, in the process of switching from the OFF mode 430 to the first drive mode 410 (S451), it takes time T1, T2, and T3, This includes the time required for turning on (booting) the light source driver and the timing controller. When the mode is switched from the first drive mode 410 to the off mode 430, the light source driver and the timing controller are turned off.

In the process of switching from the first drive mode 410 to the second drive mode 420 (S453), the light source driver and the timing controller continue to be powered on. However, the power source applied to the light source unit is cut off so that no light is emitted from the backlight unit, and the timing controller outputs black data (DATA_BLACK). The black data means that subpixels of all the pixel regions of the liquid crystal display device are controlled to display a black color. For example, RGB may be combined to output black color.

In the step S454 of switching from the second driving mode 420 to the first driving mode 410, the light source driving unit and the timing controller continue to operate in the first driving mode 410). ≪ / RTI > Therefore, the display device outputs the video by applying power to the light source without delay time for loading or booting the light source driver and the timing controller. Therefore, S454 is much shorter than S451.

The process of switching from the off mode 430 to the second drive mode 420 (S456) may be selectively provided by the display device. Similarly, the process of switching from the second drive mode 420 to the off mode 430 (S455) can also be selectively provided. The delay time occurring in the process of switching from the OFF mode 430 to the second drive mode 420 in step S456 and the process from the second drive mode 420 to the first drive mode 410 in step S454, (S451) of switching from the first drive mode 430 to the first drive mode 410. [ The second drive mode 420 may be referred to as a quick on mode in that the quick changeover to the first drive mode 410 is possible, but the present invention is not limited thereto.

5 is a diagram illustrating a sequence of switching between a first drive mode and a second drive mode according to an embodiment of the present invention. Reference numeral 501 denotes each mode. As shown in FIG. 4, in the off mode 430 to the first drive mode 410, in the first drive mode 410 to the second drive mode 420, and again in the second drive mode 420 And switches to the first drive mode 410.

Reference numeral 510 denotes a sequence of an external signal applied to the display device. The external signal is an OFF signal indicating an OFF mode or an ON signal indicating a first drive mode, a Quick_ON signal indicating a second drive mode, and an ON signal indicating a first drive mode do.

520 is a sequence of a timing controller. An ON signal is input from the outside and data is input (S551). However, since the timing controller takes time to boot (load), it takes about T1 to transfer the actual data to the display panel and operate the backlight unit. After a time period of T1, data is transmitted to the display panel, and a signal is applied to the light source driving unit of the backlight unit to operate the backlight unit (S552).

Reference numeral 530 denotes a sequence of the light source driving unit. A signal (ON) signal for instructing operation from the timing controller is input as in S552, and power is applied. As described above, the light source driving unit also takes time (T2) and booting (loading time) T3 to stabilize the power source. When the light source driving unit completes booting, the light source unit is turned on as in S553. And has a short time interval (T4) from the light source driving unit to the light source unit until power is applied and the backlight unit emits light. Therefore, it takes time T1, T2, T3 and T4 to switch from the off mode 430 to the first drive mode 410 from the outside.

On the other hand, when an instruction is given to switch from the outside to the second drive mode 420 (S554), the timing controller outputs black data and instructs the light source driver to operate in the second drive mode (S555). The light source driving unit instructs to turn off the light source unit (S556), and the light source unit cuts off the power, and the backlight unit is turned off. However, the timing controller and the light source driving unit remain in the ON state in the second driving mode 420. [ Thereafter, when the image data to be displayed is switched to the first drive mode 410 in the second drive mode 420 (S557), the timing controller stops the previous black data output and displays the received data Panel. Then, the operation of the light source unit is instructed to the light source driving unit (S558), and the light source driving unit operates the light source unit (S559). In this process, since the timing controller and the light source driving unit are kept in the ON state, the delay time of T1, T2, and T3 is not required and only T4, which is a time required for driving the light source unit, is consumed.

In summary, the light source driving unit is turned off in the off mode 430, but the light source driving unit is turned on in the first driving mode 410 and the second driving mode 420. In the second driving mode 420, It is possible to recognize that the switching time to the first driving mode 410 is high and the display device is turned on from the outside quickly because the time required in turning on the light source driving unit is eliminated in switching to the first driving mode 410. [

On the other hand, the light source unit can be controlled by the light source driving unit to be in an off state in both the second driving mode 420 and the off mode 430. Since the loading time of the light source unit is relatively short as compared with the light source driving unit, but the power consumption is large, the light source unit can be kept off in the second driving mode 420 to reduce power consumption.

6 is a diagram showing in more detail the operation of the timing controller according to an embodiment of the present invention.

And switches between the first drive mode and the second drive mode. In order to switch from the first drive mode to the second drive mode, the timing controller switches between the first drive mode and the second drive mode in a state where power is continuously applied, such as 610. 620 indicates whether the timing controller is in the first drive mode or the second drive mode. The waveforms 1 (high) 630a, 630b, and 630c indicate that the timing controller operates in the first drive mode and display an image on the screen. Here, Vx1Data of 610 indicates that the image data is a timing controller To the display panel.

Meanwhile, the waveforms 0 (low) 640a, 640b, 640c, and 640d indicate that the timing controller operates in the second driving mode and display black data (Data black) on the screen. In the Vx1Data, black data is applied to the display panel through the timing controller. When ON / OFF is instructed from the outside in a state in which the power source is applied, the display is turned off because the screen is black in the outside, and operates in the first drive mode in the ON state and in the second drive mode in the OFF state. However, since the timing controller switches between the first drive mode and the second drive mode, the switching speed is high.

The data black signal outputted in the second driving mode is applied to at least one of the data driver and the gate driver. In order to display the data black, the data driver 120 supplies the RGB signal, (DDC) to output the control signal DDC. In addition, the timing controller controls the gate driver 130 to output RGB values in the first drive mode and outputs black in the second drive mode. In one embodiment, the data black signal output in the second driving mode is different from outputting black as the video data in the first driving mode, so that the control signal GDC for controlling the gate driving unit 130 is supplied to the first driving mode And the second drive mode may be different. For example, when the gate signal is applied, the gate driver 130 operates in the first drive mode and the second drive mode, such as controlling the signal to be weakly applied to reduce power consumption, or increasing the drive time interval of the gate signal, Can be controlled by the timing controller.

FIG. 7 is a diagram illustrating an operation process in a portion 700 of FIG. And the timing controller switches from the second drive mode 640b to the first drive mode 630b in FIG. 730 shows the time when the image is displayed on the display panel to confirm that the display panel is turned on from the outside. S710 is a state in which it is determined that the display panel is turned off from outside, and S720 is a state in which it is determined that the display panel is turned on from the outside. When the timing controller switches from the second driving mode 640b to the first driving mode 630b, it controls to output data to be displayed as an image from the previous output of black data. In this process, time as T _quickstart1 . This time depends on each constituent constituting the display device, and may be 50 ms in one embodiment. This shows that the delay time of 350 ms or more can be reduced compared with T1 (400 ms) of FIG.

FIG. 8 is a detailed diagram illustrating an operation of the light source driving unit according to an embodiment of the present invention.

Reference numeral 810 denotes a sequence in which the light source driver receives power from an external timing controller. Reference numeral 820 denotes a sequence for instructing the light source driver to operate in an off mode, a first drive mode, or a second drive mode . S821 indicates an off mode, S822 and S824 indicate a first drive mode, and S823 indicates a second drive mode. Reference numeral 830 denotes a sequence indicating a state in which the light source driver is turned on or off. Reference numeral 840 denotes a sequence indicating a state in which the light source driver is operated, and reference numeral 850 denotes a sequence showing a mode in which the backlight unit operates.

At 810, the timing controller applies power. When power is applied to a level at which the light source driving unit can operate in a state where the power source is 0, the light source driving unit performs the operation of stabilizing the power for a period of time T2, and then proceeds to boot. After booting for the period T3, the light source unit is controlled as in S851 to turn on the light source of the backlight unit. When the light source unit is turned on, light is emitted from the backlight unit, such as 850, and a screen is displayed on the display unit. When the mode is switched from the first drive mode (S822) to the second drive mode (S823), the light source driving unit remains on (refer to 830 and 840 sequences). However, the light source driving unit turns off the light source unit as indicated by S852, thereby recognizing that the backlight unit is no longer operated from the outside. In the second driving mode (S823), the light source driving unit is in a state in which power is applied to the light source driving unit, such as 830 and 840, Without the delay time, the light source unit is turned on as in S853. As a result, since the time required for switching from the second drive mode S823 to the first drive mode S824 is delayed only by the time required for applying power to the light source unit and operating it, It can be judged that the conversion has been made.

FIG. 9 is a view showing an operation process in the portion 900 of FIG. Referring to 820 indicating the operation mode of the light source driving unit, the mode is switched from the second drive mode (S823) to the first drive mode (S824). When the switching is started, it is instructed to turn on the light source unit of the backlight unit, such as S853. The light source unit is turned on according to the power or the on signal, and is turned on according to the sequence of 850 to judge from the outside that the backlight unit operates. In this case, the delay time for driving the light source unit by the light source driving unit is Tquickstart2, which depends on each constituent element of the display device, and may be 50 ms in one embodiment. 3 shows that the delay time of 850 ms or more can be reduced compared with the time (900 ms) added with T2 and T3, which is the time required for turning on the backlight unit.

In the case of applying the conventional FIG. 2 and FIG. 3, the delay time for driving the display device is about 1300 ms. However, when the present invention is applied, the driving time can be reduced to 100 ms or less, .

10 is a diagram showing a configuration of a timing controller and a backlight unit according to an embodiment of the present invention.

The timing controller 1400 includes a mode control unit 1410, a backlight unit control unit 1420, a data driving control unit 1430, and a gate driving control unit 1440. And optionally a timer 1415.

The data driving control unit 1430 controls the data driving unit of the display panel, and the gate driving control unit 1440 controls the gate driving unit of the display panel. The mode control unit 1410 provides the backlight unit control unit 1420 with a signal indicating the off mode, the first drive mode, or the second drive mode. The backlight unit control unit 1420 controls the backlight unit according to the signal received from the mode control unit 1410.

The mode control unit 1410 maintains the on state in the first drive mode or the second drive mode and controls the data drive control unit 1430 or the gate drive control unit 1440 in the second drive mode to control the data black signal to be output do.

The mode control unit 1410 operates the timer 1415 at the time of operating in the second drive mode by an externally applied signal and switches the mode to the off mode when the second drive mode is maintained for a predetermined time or more. The mode controller 1410 controlled by the timing controller 1400 or the timing controller 1400 can operate the timer. When the timer controller 1400 or the mode controller 1410 starts the operation in the second drive mode, the timer is activated, and when the timer reaches the threshold value, the timing controller 1400 or the mode controller 1410 switches the second drive mode to the off mode, The power consumption can be reduced. The threshold value of the timer can be set externally or flexibly according to the switching time and switching interval of the 1/2 driving mode from the outside.

In addition, when the threshold value is reached and the mode is switched from the second drive mode to the off mode, the power source applied to the light source driver 1510 is turned off, thereby turning off the backlight unit 1500 completely. Similarly, the power source applied to the light source driver 1510 may be cut off to reduce power consumption in the second drive mode.

The backlight unit control unit 1420 does not apply power to the backlight unit in the off mode according to a signal instructed by the mode control unit 1410. In the first driving mode and the second driving mode, power is applied to the backlight unit, and a signal indicating that the light source driving unit is in the first driving mode or the second driving mode is provided. Also, the mode controller 1410 can check the timer 1415 and control the backlight unit controller 1420 to turn off the power applied to the backlight unit when the second driving mode is maintained for a predetermined time or more.

11 is a flowchart illustrating a process of displaying data black in a data driver or a gate driver of a timing controller according to an embodiment of the present invention. In order to display data black, the data driving control unit 1430 controls the first driving unit, that is, the data driving unit 120 to output black (RGB representing black) in providing RGB signals to the data driving unit 120, And can provide the control signal DDC.

Meanwhile, the gate drive control unit 1440 controls the second drive unit, i.e., the gate drive unit 130 to output RGB values in the first drive mode S1101 and outputs black in the second drive mode S1102. In one embodiment, the data black signal output in the second driving mode is different from the black data output in the first driving mode, so that the control signal GDC ) May be different between the first drive mode and the second drive mode. For example, when the gate signal is applied, the gate driver 130 operates in the first drive mode and the second drive mode, such as controlling the signal to be weakly applied to reduce power consumption, or increasing the drive time interval of the gate signal, The gate drive control unit 1440 may control the gate drive control unit 1440 so that the gate drive control unit 1440 changes the method.

The data black signal according to an embodiment of the present invention may be a data black signal for outputting the entire panel in black in the process of outputting the actual image. For this purpose, the data black signal can be controlled so that all pixel regions display black. That is, a signal indicating black color may be applied to the data driver 120, and more specifically, the sub-pixels R, G, and B constituting all the pixels in the display panel may be turned off . In the second driving mode S1102, the light source unit does not emit light, but may turn off the sub-pixels to prevent reflection of external light due to wiring in the display panel or the like. Since the data driver 120 and the gate driver 130 do not output a changing image, the pulse period of the signal applied to the gate driver 130 in the data black signal can be reduced. Consumption can be reduced.

12 is a diagram illustrating a process in which the timing controller 1400 controls the backlight unit 1500 according to an embodiment of the present invention. The backlight unit control unit 1420 provides a signal indicating that the mode control unit 1410 is the first driving mode to the backlight unit control unit 1420 (S1201), and the backlight unit control unit 1420 provides the first driving mode control signal to the light source driving unit 1510 (S1202). The light source driving unit 1510 applies power to the light source unit 1520 as shown in S1203 in order to operate the light source unit 1520. [ Next, in order to operate the second drive mode, the mode controller 1410 provides a signal indicating the second drive mode to the backlight unit controller 1420 (S1211), and the backlight unit controller 1420 controls the second drive mode control And provides the signal to the light source driver 1510 (S1212). The light source driving unit 1510 cuts off the power applied to the light source unit 1520 as shown in S1213 in order to stop the operation of the light source unit 1520. [

12, the backlight unit controller 1420 applies power to the backlight unit 1500 in the first driving mode and the second driving mode, and instructs the light source driver 1510 to operate in the first driving mode or the second driving mode Signal so that the second drive mode, which is one of the operation modes of the backlight unit 1500, may exist as an intermediate stage between the first drive mode and the off mode, and as a result, the second drive mode is changed from the second drive mode to the first drive mode The time required for loading the light source driving unit and the timing controller, which have occurred in the conventional operation from the off mode to the on mode, can be reduced.

When the present invention is applied to a TV, a smart phone, a tablet, a notebook computer, or the like, a quick boot mode can be implemented. In the mode for waiting for the quick boot as in the second drive mode, the backlight unit is not completely turned off but the brightness is set to 0 so that the light source unit is not operated and the light source driving unit is operated. When the light source unit of the backlight unit is an LED, the LED driver becomes the light source driving unit, and the LED driver can turn off the LED channel (control the luminance to 0%) in the second driving mode. On the other hand, when the timing controller processes the image as a data black signal and performs a quick boot, the delay time that occurs in driving the LCD screen conventionally can be reduced.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the appended claims. , Separation, substitution, and alteration of the invention will be apparent to those skilled in the art. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents thereof should be construed as falling within the scope of the present invention.

100: liquid crystal display device 120: data driver
130: Gate driver 1400: Timing controller
1410: Mode control unit 1420: Backlight unit control unit
1430: Data drive control section 1440: Gate drive control section
1500: backlight unit 1510: light source driver

Claims (10)

A display panel including a plurality of pixel regions;
A data driver for providing a signal to a data line of the display panel;
A gate driver for providing a signal to a gate line of the display panel;
A backlight unit including a light source unit for outputting light to the display panel and a light source driver for controlling the light source unit; And
And a timing controller for controlling the data driver and the gate driver to control the light source driver to operate in an off mode, a first drive mode, or a second drive mode.
The method according to claim 1,
Wherein the timing controller outputs a data black signal to the data driver or the gate driver in the second driving mode.
3. The method of claim 2,
And the data black signal is a signal for controlling all the pixel regions to display black.
The method according to claim 1,
Wherein the light source driving unit is turned off in the off mode and the light source driving unit is on in the first driving mode and the second driving mode.
The method according to claim 1,
And the light source driving unit controls the light source unit in an off state in the second driving mode.
The method according to claim 1,
Wherein the timing controller comprises a timer,
And activates the timer when the operation is started in the second drive mode,
And switches from the second drive mode to the off mode when the timer reaches the threshold value.
The method according to claim 6,
Wherein the timing controller cuts off the power applied to the light source driving unit when switching from the second driving mode to the off mode.
A data driving control unit for controlling the data driving unit of the display panel;
A gate drive control unit for controlling a gate driving unit of the display panel;
A backlight unit control unit for controlling the backlight unit of the display panel; And
And a mode control unit for supplying a signal indicating the OFF mode, the first drive mode or the second drive mode to the backlight unit control unit.
9. The method of claim 8,
Wherein the mode control section provides a signal for instructing the data drive control section or the gate drive control section to output a data black signal in the second drive mode.
9. The method of claim 8,
Wherein the backlight unit control unit applies power to the backlight unit in the first driving mode and the second driving mode and provides a signal to the light source driving unit to indicate the first driving mode or the second driving mode Timing controller.

Images