KR20110067183A - Image display device and driving method thereof - Google Patents

Abstract

PURPOSE: An image display device and a driving method thereof are provided to maximize an interior decoration function by displaying a certain image on a display panel even when the power of a system is turned off. CONSTITUTION: In an image display device and a driving method thereof, a system body(100) generates a predetermined image. A display module(200) shows the captured image in a display panel. A memory unit(220) comprises first and second memory devices A timing control part(240) generates the first and second data signals. A panel driving unit(250) displays first and second data signal on the display panel. A back light unit(260) projects light to the display panel. A backlight driver(270) drives the backlight unit according to the dimming signal.

Description

Image display device and driving method thereof {IMAGE DISPLAY DEVICE AND DRIVING METHOD THEREOF}

The present invention relates to an image display device, and more particularly, to an image display device and a driving method thereof capable of maximizing interior decoration by displaying a predetermined image on a display panel even when the system main body is powered off. will be.

In general, the image display apparatus may be classified into a system main body supplying an image to a display panel for displaying an image, and a display module displaying an image provided from the system main body.

Such a general video display device may be powered off of the system main body, that is, even when the display module is turned on when there is no signal input to the display module from the main body (for example, a computer or a television). The predetermined image is not displayed on the display panel. That is, the display module displays an image only when the power of the system main body is turned on.

Therefore, the conventional video display device is designed to give priority to the use for broadcasting or movie watching so that the environmental beautification is not considered at all. Therefore, the power of the system main body is turned off at the time of not watching the broadcasting, so that the display panel is always There is a problem in that the interior decoration of the image display device occupying a large space in a living room or a room is restricted by maintaining black color.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and provides an image display device and a driving method thereof capable of maximizing an interior decoration function by displaying a predetermined image on a display panel even when the system main body is powered off. Let it be technical problem.

According to an aspect of the present invention, there is provided an image display device including: a system body generating a predetermined image; And displaying the image provided from the system main body on a display panel, storing a captured image captured by the image displayed on the display panel according to an input image capture signal in a memory unit, and then powering off the system main body. Off) is characterized in that it comprises a display module for displaying the captured image stored in the memory unit on the display panel using the standby power provided from the system main body.

According to an aspect of the present invention, a video display device includes: a display panel including a plurality of pixels formed in a matrix; After generating the first data signal corresponding to the input image by using the input driving power, or storing the captured image of the captured image according to the input image capture signal in the memory unit, using the standby power input A timing controller configured to generate a second data signal corresponding to the captured image stored in the memory unit; And a panel driver configured to generate and supply a data voltage corresponding to the first data signal or the second data signal supplied from the timing controller.

The memory unit may include a first memory device that temporarily stores the captured image; And a second memory device configured to receive and store the captured image temporarily stored in the first memory device.

According to an aspect of the present invention, there is provided a method of driving an image display apparatus, the method including generating a predetermined image in a system main body; Displaying the image provided from the system main body on a display panel; Storing a captured image of a captured image displayed on the display panel in a memory unit according to an image capture signal according to a user's manipulation; And displaying the captured image stored in the memory unit on the display panel using standby power provided from the system main body when the system main body is turned off.

The storing of the captured image in a memory unit may include temporarily storing the captured image in an SDRAM; And storing the captured image temporarily stored in the SDRAM in a flash memory.

As described above, the image display device and the driving method thereof according to the present invention include a captured image of capturing an image displayed on a display panel according to an image capture signal according to a user's operation when the system main body is powered on. After storing, the captured image stored in the memory unit is displayed on the display panel by using the standby power generated by the system main body when the system main body is powered off.

First, even when the system main body is turned off, by displaying a predetermined image on the display panel, the interior decoration function of the image display device can be maximized.

Secondly, after storing the captured image temporarily in the SDRAM, the captured image stored in the SDRAM is transferred to the flash memory and stored, thereby quickly storing the captured image.

Third, there is an effect that the power consumption can be minimized by adjusting the brightness of the display panel to correspond to the illumination of the surrounding environment using the illumination sensor.

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

1 is a diagram for schematically describing an image display apparatus according to an exemplary embodiment.

Referring to FIG. 1, an image display apparatus according to an exemplary embodiment of the present invention includes a system main body 100 and a display module 200.

The system main body 100 generates a predetermined image Idata, a timing synchronization signal TSS, and a driving power source Vin to provide to the display module 200. In addition, the system main body 100 generates a mode signal MDS corresponding to an on state or an off state of a power supply, and generates a capture image signal CTS according to a user's manipulation to display a display module ( 200).

To this end, as shown in FIG. 2, the system main body 100 includes a signal processing unit 110, a power supply unit 120, a capture signal receiving unit 130, and a microcomputer 140.

The signal processor 110 generates a predetermined image Idata according to a signal input through an antenna, a cable, an external input terminal, for example, a broadcast signal, and displays the predetermined image Idata in addition to the display module 200. Generates a timing synchronization signal TSS for display. Here, the predetermined image Idata may be a still image or a moving image, and the timing synchronization signal TSS may be a vertical / horizontal synchronization signal V, H, a clock signal DCLK, a data enable signal DE, or the like. This can be The signal processor 110 generates and displays a predetermined image Idata and a timing synchronization signal TSS using a predetermined interface method only when the system main body 100 is turned on under the control of the microcomputer 140. Output to module 200.

In addition to the above-described functions, the signal processor 110 may perform various functions for displaying an image on the display module 200 when the system main body 100 is turned on.

The power supply unit 120 generates driving power for driving the display module 200 using wall power input through a power cable, and provides the generated driving power Vin to the display module 100. In this case, the power supply unit 120 generates the driving power Vin when the system main body 100 is turned on, and provides the driving power Vin to the display module 100, while the power supply unit 120 turns off the system main body 100. The standby power Vps is generated and provided to the display module 100 according to the power down mode set at the time of Off.

The capture signal receiver 130 receives an image capture signal CTS generated by a user's operation and provides the captured signal to the microcomputer 140. Here, the image capture signal CTS may be generated according to a user's operation of the remote controller for remote control of the image display device.

The microcomputer 140 controls the signal processor 110, the power supply unit 120, and the capture signal receiver 130, and controls the system main body 100 and the display module 200.

In addition, when the system main body 100 is in an on state, the microcomputer 140 generates a first mode signal MS having a first logic state and provides the first mode signal MS to the display module 200. In the off state, the second mode signal MS of the second logic state is generated and provided to the display module 200.

In addition, the microcomputer 140 provides an image capture signal CTS provided from the capture signal receiver 130 to the display module 200.

Meanwhile, as illustrated in FIG. 1, the system main body 100 may further include an illumination sensor 101 provided to the display module 200 by detecting peripheral illumination of the image display device. Accordingly, the microcomputer 140 provides the illuminance signal provided from the illuminance sensor 101 to the display module 200.

In FIG. 1, the display module 200 displays a predetermined image Idata provided from the system main body 100 on the display panel 210, and displays the predetermined image Idata on the display panel 210 according to the input image capture signal CTS. After storing the captured image captured by the displayed image in the memory unit 220, when the system main body 100 is powered off, the standby unit is provided to the memory unit 220 using standby power provided from the system main body 100. The stored captured image is displayed on the display panel 210. To this end, the display module 200 includes a display panel 210, a memory 220, a voltage generator 230, a timing controller 240, a panel driver 250, a backlight unit 260, and a backlight. It is configured to include a driver 270.

The display panel 210 includes a plurality of pixels P formed for each pixel region provided by the intersection of the plurality of gate lines GL and the plurality of data lines DL. Each of the plurality of pixels P includes a thin film transistor (not shown) connected to the gate line GL and the data line DL, and a liquid crystal cell connected to the thin film transistor. The display panel 210 displays a predetermined image by forming an electric field in the liquid crystal cell according to the data voltage supplied to each pixel P to adjust the transmittance of light emitted from the backlight unit 260.

The memory unit 220 may display a predetermined image Idata provided from the signal processor 110 of the system main body 100 under the control of the timing controller 240 according to the mode signal MDS and the image capture signal CTS. The captured captured image is stored and the stored captured image is provided to the timing controller 240. The detailed configuration of the memory unit 220 will be described later.

The voltage generator 230 displays an image Idata provided from the system main body 100 by using the driving power Vin provided from the system main body 100 when the system main body 100 is turned on. A driving voltage for displaying at 210 is generated, and the generated driving voltage is provided to the corresponding component. On the other hand, the voltage generator 230 displays the captured image provided from the memory unit 220 using the standby power (Vps) provided from the system main body 100 when the system main body 100 is turned off. A panel driving voltage and a minimum backlight driving voltage Vdc for displaying on the panel 210 are generated, and the generated driving voltage is provided to the corresponding component.

As illustrated in FIG. 3, the timing controller 240 controls the signal controller 241, the control signal generator 243, the dimming signal generator 245, the data processor 247, and the memory controller 249. It is configured to include.

The signal controller 241 controls the control signal generator 243, the dimming signal generator 245, the data processor 247, and the memory controller 249 according to the mode signal MS provided from the system main body 100. Controls the driving of internal components, including.

When the first mode signal MS of the first logic state is supplied from the microcomputer 140 of the system main body 100, the signal controller 241 may display an image Idata provided from the system main body 100. When the driving of the durable components is controlled to be displayed on the 210 and the second mode signal MS of the second logic state is supplied from the microcomputer 140, the captured image provided from the memory unit 220 is displayed on the display panel 210. Control the driving of the durable components.

In addition, the signal controller 241 may store the first logic state for storing the captured image in the memory unit 220 according to the first mode signal MS and the image capture signal CTS of the first logic state from the microcomputer 140. Generates a memory driving signal MDS and provides it to the memory controller 249, and captures the captured image stored in the memory 220 according to the second mode signal MS of the second logic state from the microcomputer 140. The memory driving signal MDS of the second logic state for output to the processing unit 247 is generated and provided to the memory control unit 249.

Meanwhile, when the second mode signal MS having the second logic state is supplied from the microcomputer 140, the signal controller 241 generates the timing synchronization signal TSS by using an internal clock generator (not shown). do.

The control signal generator 243 generates timing control signals DCS and GCS for displaying an image on each pixel P according to the timing synchronization signal TSS supplied from the signal controller 241. Here, the timing control signals DCS and GCS include a data control signal DCS for supplying a data voltage to the data line DL, and a gate control signal GCS for supplying a gate pulse to the gate line GL. Can be.

The dimming signal generator 245 generates a dimming signal DIM for adjusting the luminance of the backlight unit 260 according to the luminance control signal LCS of the signal controller 241 and provides the dimming signal DIM to the backlight driver 270. do. Here, the signal controller 241 generates the luminance control signal LCS using the illuminance signal detected by the illuminance sensor 101 provided in the system main body 100, thereby illuminating the ambient environment of the system main body 100. As a result, the luminance of the backlight unit 260 is optimized. In this case, the illumination sensor 101 may not be provided in the system main body 100, but may be provided in the display module 200 within a range in which external light may be incident.

Meanwhile, when the second mode signal MS of the second logic state is supplied from the system main body 100, the signal controller 241 may provide the image display device to the illuminance sensor 101 to maintain the minimum power consumption. The luminance control signal LCS is generated so that the luminance of the display panel 210 corresponds to the luminance of the actual frame according to the illumination signal detected by the illuminance signal. For example, the signal controller 241 may set the luminance of the display panel 210 to be in the range of 30 to 55 nit according to the illuminance signal detected by the illuminance sensor 101 within the range of 200 to 400 lux, which is an indoor illuminance environment. The luminance control signal LCS may be generated.

The data processor 247 arranges the image Idata provided from the signal controller 241 according to the first mode signal MS into the first data signal RGB1 so as to be suitable for driving the display panel 210. Provided at 250. In addition, the data processor 243 may display the captured image provided from the memory unit 220 under the control of the signal controller 241 according to the second mode signal MS so as to be suitable for driving the display panel 210. Aligned with the signal RGB2 and provided to the panel driver 250.

On the other hand, the data processor 247 uses the first data signal RGB1 or the second data signal RGB2 to be supplied to the pixel formed in the predetermined block corresponding to the predetermined area of the display panel 210. BLD) may be extracted and provided to the dimming control signal generator 245. Accordingly, the dimming control signal generator 245 uses the block-specific dimming signal DIM for controlling the luminance of the backlight unit 260 for each block by using the block-specific luminance data BLD provided from the data processor 247. ) Is generated and provided to the backlight driver 270.

When the first memory driving signal MDS is provided from the signal controller 241, the memory controller 249 generates a first memory control signal MCS for storing the captured image in the memory 220 and then stores the memory unit. When the second memory driving signal MDS is provided, the second memory control signal MCS is provided to receive the captured image stored in the memory 220 and transmit the captured image to the data processor 247. ) To control the driving of the memory unit 220.

4 is a diagram for describing a memory unit according to an exemplary embodiment of the present invention.

4, the memory unit 220 includes first and second memory elements 222 and 224.

The first memory device 222 captures a captured image of capturing an image Idata provided from the signal processor 110 of the system main body 100 according to the first memory control signal MCS provided from the memory controller 249. Save temporarily. In this case, the first memory device 222 is preferably a storage medium having a high operating speed in order to store the captured image for a predetermined time.

The second memory device 222 receives and stores a captured image temporarily stored in the first memory device 222 according to the first memory control signal MCS. In this case, the second memory device 224 may be configured as a flash memory as a storage medium having a larger memory capacity in order to store a large amount of captured images.

In addition, the second memory device 224 provides the memory controller 249 with the captured image Cdata stored according to the second memory control signal MCS provided from the memory controller 249. Accordingly, the memory controller 249 provides the data processor 247 with the captured image Cdata provided from the second memory device 224.

In FIG. 1, the panel driver 250 includes a data driver circuit 252 and a gate driver circuit 254.

The data driving circuit unit 252 latches the first or second data signals RGB1 and RGB2 input from the timing control unit 240 according to the data control signal DCS supplied from the timing control unit 240, and performs analog positive polarity. After converting the latched data signal to the positive / negative analog data voltage using the negative gamma voltage, a data voltage having a polarity corresponding to the polarity control signal is generated and supplied to the data lines DL.

The gate driving circuit unit 254 generates gate pulses according to the gate control signal GCS supplied from the timing controller 240 and sequentially supplies the gate pulses to the gate lines GL. Here, the gate driving circuit unit 254 may be formed on the substrate at the same time as the thin film transistor is formed.

The backlight unit 260 includes a plurality of light emitting diode arrays 262 having a plurality of light emitting diodes (LEDs) connected in series. The backlight unit 260 emits light to the display panel 210 by emitting a plurality of light emitting diodes (LEDs) provided in the light emitting diode arrays 262 under the control of the backlight driver 270. In this case, in FIG. 1, the backlight unit 260 of the direct structure is illustrated by irradiating light onto the display panel 210 using the plurality of light emitting diode arrays 262 disposed on the rear surface of the display panel 210. The backlight unit 260 may include an edge type structure for irradiating light to the display panel 210 using at least one LED array disposed to correspond to at least one side of the display panel 210. Can have

Furthermore, the backlight unit 260 may further include a plurality of optical members for improving the brightness characteristic of the light, in addition to the above-described light emitting diode array 262.

The backlight driver 270 drives the backlight unit 260 based on the dimming signal DIM provided according to the mode signal MS from the dimming signal generator 245 of the timing controller 240. In this case, the backlight driver 270 may perform block dimming to individually control driving of each of the plurality of light emitting diode arrays 262 provided in the backlight unit 260 according to the dimming signal DIM. When the captured image Cdata is displayed on the display panel 210, the block dimming may turn off the LED array 262 that emits light to a region other than a region corresponding to the size of the captured image Cdata. Therefore, it may be useful for minimizing power consumption when the system main body 100 is turned off.

As such, the image display apparatus according to an exemplary embodiment captures an image displayed on the display panel 210 according to an image capture signal CTS according to a user's operation when the system main body 100 is powered on. After storing the captured image in the memory unit 220, the captured image stored in the memory unit 220 using standby power generated by the system main body 100 when the system main body 100 is powered off. ) Is displayed on the display panel 210 to display a predetermined image on the display panel 210 when the system main body 100 is powered off, thereby maximizing the interior decoration function with minimal power consumption.

5A through 5D are diagrams for describing a driving method of an image display device according to an exemplary embodiment.

Referring to FIGS. 5A to 5D and FIGS. 1 to 4, a driving method of an image display device according to an exemplary embodiment of the present invention will be described as follows. Hereinafter, the driving method of the image display device will be described only for the process of capturing and storing an image when the system main body 100 is turned on, and then displaying the captured image stored when the system main body 100 is turned off. Shall be.

First, as shown in FIG. 5A, when the power of the system main body 100 is turned on, the first mode signal MS of the first logic state L is generated in the microcomputer 140, thereby displaying the display module 200. The image I is provided from the system main body 100 based on the first mode signal MS of the first logic state L by using the image Idata, the timing synchronization signal TSS, and the driving power source Vin. The first data signal RGB1 corresponding to Idata is generated, and the panel driver 250 is driven to supply a data voltage corresponding to the first data signal RGB1 to each pixel P of the display panel 210. To display the image.

Then, as shown in FIG. 5B, while the image is continuously displayed on the display panel 210, when the image capture signal CTS of the high state H is provided from the microcomputer 140 according to a user's manipulation. The display module 200 may display an image currently displayed on the display panel 210 according to the first mode signal MS in the first logic state L and the image capture signal CTS in the high state H. Temporarily stored in the element 222.

Then, as illustrated in FIG. 5C, the display module 200 may include the first memory according to the first mode signal MS in the first logic state L and the image capture signal CTS in the low state L. The captured image temporarily stored in the device 222 is transferred to the second memory device 224 and stored.

Then, the display module 200 repeats the processes as described above with reference to FIGS. 5B and 5C according to the mode signal MS and the image capture signal CTS supplied from the microcomputer 140, thereby providing a plurality of operations according to the user's operation. The captured image of the second memory device 224 is stored.

Thereafter, when the power of the system main body 100 is turned off, the second mode signal MS having the second logic state H is generated in the microcomputer 140 so that the display module 200 may enter the second logic state H. In response to the second mode signal MS, the captured image stored in the second memory device 224 is displayed on the display panel 210 using the standby power Vps provided from the system main body 100.

The display module 200 when the power of the system main body 100 is turned off will be described in detail as follows.

First, a clock signal is generated through the internal clock generator of the timing controller 240 using the standby power supply Vps provided from the system main body 100 according to the second mode signal MS of the second logic state H. do.

Thereafter, the backlight unit 260 irradiates light to the display panel 210 and a timing control signal for displaying the captured image stored in the second memory device 224 on the display panel 210 using a clock signal. Generate a dimming signal (DIM) for controlling the.

Next, the second data signal RGB2 corresponding to the captured image Cdata stored in the second memory device 224 is generated, and the dimming signal generated based on the illuminance detected by the illuminance sensor 101 ( According to the DIM, the backlight unit 260 is driven with minimum power consumption to irradiate light to the display panel 210.

Then, the panel driver 250 is driven according to the timing control signal to supply and display a data voltage corresponding to the second data signal RGB2 to each pixel P of the display panel 210.

As described above, the driving method of the image display device according to an exemplary embodiment of the present invention is displayed on the display panel 210 according to an image capture signal CTS according to a user's operation when the system main body 100 is powered on. The captured image captured by the image is temporarily stored in the first memory device 222 and then stored in the second memory device 224, and then generated by the system main body 100 when the system main body 100 is powered off. The captured image Cdata stored in the second memory device 224 is displayed on the display panel 210 by using the standby power, and the predetermined image is displayed on the display panel 210 when the system main body 100 is turned off. It can be displayed to maximize interior decoration function with minimum power consumption.

Those skilled in the art to which the present invention pertains will understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. Therefore, it is to be understood that the embodiments described above are exemplary in all respects and not restrictive. The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention. do.

1 is a diagram for schematically describing an image display apparatus according to an exemplary embodiment.

FIG. 2 is a diagram for schematically describing a system main body shown in FIG. 1.

FIG. 3 is a diagram for schematically describing a timing controller illustrated in FIG. 1.

4 is a diagram for schematically describing a memory unit illustrated in FIG. 1.

5A through 5D are diagrams for describing a driving method of an image display device according to an exemplary embodiment.

<Explanation of Signs of Major Parts of Drawings>

100: system body 200: display module

210: display panel 220: memory unit

222: SDRAM 224: Flash memory

230: voltage generator 240: timing controller

250: panel driver 260: backlight unit

262: LED array 270: backlight driver

Claims (12)

A system body generating a predetermined image; And The image provided from the system main body is displayed on a display panel, and the captured image captured by the image displayed on the display panel is stored in a memory unit according to an input image capture signal. And a display module configured to display a captured image stored in the memory unit on the display panel using standby power provided from the system main body. The method of claim 1, The memory unit, A first memory device for temporarily storing the captured image; And And a second memory device configured to receive and store the captured image temporarily stored in the first memory device. The method of claim 2, The system body, A signal processor which generates the image; A voltage generator configured to generate driving power when the system main body is turned on and to generate the standby power to the display module when the system main body is turned off; A capture signal receiver configured to receive the image capture signal according to a user's manipulation; And The image capture signal provided from the capture signal receiving unit is provided to the display module, and a first mode signal is generated when the system body is powered on, and a second mode signal is supplied when the system body is powered off. And a microcomputer which is generated and provided to the display module. The method of claim 3, wherein The display module, A voltage generator configured to generate a driving voltage for driving the display panel using the driving power source or the standby power source provided from the system main body; The first data signal corresponding to the image is generated according to the first mode signal, and the captured image corresponding to the image is temporarily stored in the first memory element according to the image capture signal and then stored in the second memory element. A timing controller configured to control the memory to be stored and to generate a second data signal corresponding to the captured image provided from the second memory device according to the second mode signal; A panel driver configured to display the first data signal or the second data signal on the display panel according to the control of the timing controller; A backlight unit radiating light onto the display panel; And And a backlight driver configured to drive the backlight unit according to the dimming signal supplied from the timing controller. The method of claim 4, wherein Further comprising an illumination sensor provided in the system body or the display module, The timing controller detects the illuminance of the surrounding environment using the illuminance sensor according to the second mode signal, and generates the dimming signal for adjusting the luminance of the backlight unit according to the detected illuminance. Video display device. The method of claim 4, wherein The timing controller, Generating a timing control signal for displaying the first data signal on the display panel using a timing synchronization signal provided from the signal processor in accordance with the first mode signal, and controlling the panel driver; And a timing control signal for displaying the second data signal on the display panel using a clock signal generated from an internal clock generator according to the second mode signal to control the panel driver. . A display panel including a plurality of pixels formed in a matrix; After generating the first data signal corresponding to the input image by using the input driving power, or storing the captured image of the captured image according to the input image capture signal in the memory unit, using the standby power input A timing controller configured to generate a second data signal corresponding to the captured image stored in the memory unit; And And a panel driver configured to generate and supply a data voltage corresponding to the first data signal or the second data signal supplied from the timing controller. The method of claim 7, wherein The memory unit, A first memory device for temporarily storing the captured image; And And a second memory device configured to receive and store the captured image temporarily stored in the first memory device. Generating a predetermined image in the system main body; Displaying the image provided from the system main body on a display panel; Storing a captured image of a captured image displayed on the display panel in a memory unit according to an image capture signal according to a user's manipulation; And And displaying the captured image stored in the memory unit on the display panel using standby power provided from the system main body when the system main body is turned off. The method of claim 9, The storing of the captured image in the memory unit may include: Temporarily storing the captured image in SDRAM; And And storing the captured image temporarily stored in the SDRAM in a flash memory. The method of claim 9, The displaying of the captured image on the display panel may include: Generating a timing control signal for displaying the captured image on the display panel using a clock signal generated from an internal clock generator and a dimming signal for controlling a backlight unit for irradiating light to the display panel; Generating a data signal corresponding to the captured image stored in the flash memory; Irradiating light to the display panel by driving the backlight unit according to the dimming signal; And And displaying the data signal on the display panel according to the timing control signal. The method of claim 9, The displaying of the captured image on the display panel may include: Detecting illuminance of the surrounding environment using an illuminance sensor provided in the system main body or the display module; And And adjusting the brightness of the backlight unit according to the detected illuminance.

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