KR20170119250A - Display device and method for driving the same - Google Patents

Abstract

The present invention relates to a display device and a driving method, and the disclosed configuration controls a gate driver of a display panel and an upper and a lower data driver, analyzes an image applied from the outside, and performs a single bank driving and a double bank driving And a timing controller for selecting the timing controller.

Description

DISPLAY DEVICE AND METHOD FOR DRIVING THE SAME

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for driving a display device, and more particularly to a display device and a driving method capable of selectively applying a single bank or a double bank drive according to the type of an image input to the display device .

The flat panel display includes a liquid crystal display (LCD), an organic light emitting display (OLED) display, an electrophoretic display (EPD), a plasma display Panel: PDP).

Among these display devices, an active matrix liquid crystal display device displays a moving image by using a thin film transistor (hereinafter referred to as "TFT") as a switching element.

The liquid crystal display device can be downsized as compared with a cathode ray tube (CRT), and is applied to a display device in a portable information device, an office machine, a computer, and the like, and is rapidly applied to a television, thereby quickly replacing a cathode ray tube.

A liquid crystal display device includes a liquid crystal display panel, a backlight unit for irradiating light to the liquid crystal display panel, a source driver integrated circuit (IC) for supplying a data voltage to the data lines of the liquid crystal display panel, A gate driver IC for supplying a gate pulse (or a scan pulse) to scan lines (or scan lines), a control circuit for controlling the ICs, a light source driving circuit for driving light of the backlight unit, and the like.

The liquid crystal display device displays an image corresponding to the video signal by adjusting the light transmittance of the liquid crystal cells on the liquid crystal panel. A liquid crystal display device includes a liquid crystal panel driving device for driving liquid crystal cells on a liquid crystal panel.

The organic light emitting display device (OLED display) is widely applied to a large-sized model because it has advantages of high response speed, high luminous efficiency, high luminance and wide viewing angle by using a self-luminous element which emits light by itself have.

An organic light emitting display includes a plurality of subpixels including an organic light emitting diode arranged in a matrix form and selectively turning on a TFT as an active element through a scan pulse to select subpixels, And controls it according to the gradation of the digital video data.

In order to drive a display device including such an organic light emitting display device, a source driver IC and a gate driver IC, which are connected to a data line and a gate line, respectively, are mounted on one side or the other of the panel in various manners as described above , And the display device can be driven by using a double bank or a single bank method selectively according to the position of each of the driving drivers.

The display device is divided into a single bank type and a double bank type according to the arrangement of the data driving IC.

In the display device of the single bank type, the chips of the data driving IC are disposed on only one edge of the display panel. On the other hand, in the display device of the double bank type, chips of the data driving IC are dispersed .

Conventionally, a display panel of a predetermined size is driven by a single bank according to the driving capability of the data driving integrated circuit. In the case of a very large display panel, in the case of driving by a single bank, It is driven by a double bank.

However, according to the driving capability limit of the data driving circuit, the data driving IC, that is, the source data circuit (D-IC) is connected to the top and bottom of the display panel. Particularly, in the case of a very large display device model, a design is made as a double bank due to the limitation of the driving capability of the data D-IC.

On the other hand, when designing the display panel, it is simulated based on the worst drive pattern standard and designed as a double bank when it can not be driven by a single bank.

Further, even when driving a typical general pattern or moving picture in which the driving ability is not insufficient, it is driven by a double bank, so that power consumption is excessively consumed.

An object of the present invention is to provide a display device and a driving method capable of reducing power consumption by selectively using single bank driving or double bank driving according to the type of an input image provided on a display device.

According to one aspect of the present invention, there is provided a display device including a gate driver connected to a display device, an upper and a lower data driver, And a timing controller for selecting driving of a double bank and a double bank.

The timing controller includes an image analyzer for analyzing image data provided from the outside, a signal controller for controlling a signal according to the analyzed image type, an enable (En) controller for outputting an output signal from the signal controller to a data driver, RTI ID = 0.0 > (EPI) < / RTI >

The timing controller of the display apparatus according to the present invention can select a single bank operation when an image input from the outside is analyzed as moving images or photographs.

The timing controller of the display apparatus according to the present invention outputs a control signal for selecting the single bank driving so as to enable (En) only one data driver among the upper and lower data drivers and disable (Dis) the other data driver .

The timing controller of the display device according to the present invention can select a double bank driving when an image input from the outside is a single color and a simple pattern.

The timing controller of the display apparatus according to the present invention outputs a control signal for selecting a double bank driving and outputs the control signals to the upper and lower data drivers 130 and 140 (En).

The image analysis unit constituting the timing controller of the display device according to the present invention may include a frame storage unit for storing an image input from the outside, and a display unit for displaying a moving image, a complicated photograph, And an image judging unit for judging the image.

The image judging unit of the display device according to the present invention includes a moving picture unit for judging whether the image input to the frame storing unit is a moving picture, a photographing unit for judging whether the inputted picture is a complicated picture, A simple still image other than a photograph, and a simple pattern portion for determining whether the pattern is a monochromatic or simple pattern.

The moving image of the display device according to the present invention includes an image comparing unit for comparing a previous image with a current image to compare the same image or another image, And a moving image judging unit for judging the moving image when the other image is kept for a few seconds.

The photographing portion of the display device according to the present invention compares adjacent data in an image if a previous image and a current image are found to be the same image in a moving image portion, A time duration unit for counting time when different data are not in a tens of% or less, and a picture judgment unit for judging a picture as a picture if the state lasts for a few seconds.

According to another aspect of the present invention, there is provided a method of driving a display device including a step of analyzing an externally applied image and selecting a single bank drive or a double bank drive according to a type of an image Can be provided.

The display device according to the present invention can output a control signal for selecting a single bank driving operation through a timing controller when an image input from the outside is analyzed as moving images or photographs.

A method of driving a display device according to the present invention outputs a control signal for selecting a single bank drive through a timing controller to enable (En) only one data driver among the upper and lower data drivers, (Disable).

A driving method of a display device according to the present invention can output a control signal for selecting a double bank driving through a timing controller when an image input from the outside through a timing controller is a single color or a simple pattern.

The driving method of the display device according to the present invention may enable the upper and lower data drivers by outputting a control signal for selecting the double bank driving through the timing controller.

A driving method of a display device according to the present invention can store an image input from the outside through a timing controller and judge whether the stored image is a moving image or a complicated photograph, or other simple still image, monochrome or simple pattern.

A driving method of a display device according to the present invention compares a previous image with a current image through a timing controller to compare the same or a different image and if the images are not the same image, can do.

In the method of driving a display device according to the present invention, if a previous image and a current image are found to be the same image through a timing controller, the adjacent data in the image are compared and compared with each other, , Counting the time when the different data is not several tens% or less, and judging by the photograph when the state lasts for several seconds.

A driving method of a display device according to the present invention is a method of driving a display device in which if a previous image and a current image are determined to be the same image through a timing controller, the adjacent data in the image are compared to determine whether a simple still image, Or a simple pattern.

The display device and the driving method according to the present invention are characterized in that the module of the driving concept of the double bank of the very large display device due to the restriction of the driving ability of the driving driver circuit is consumed by the selective driving of the single bank and the double bank Power can be reduced.

The display device and the driving method according to the present invention are driven by a single bank when a user drives a moving image or a complicated picture hardly recognizable by a luminance difference, and when other simple still images and special patterns are input It can be driven by double bank.

1 is a schematic configuration diagram of a display device according to the present invention.
FIG. 2 is a diagram showing a single bank and a double bank selection drive of the display device according to the present invention.
Fig. 3 is a block diagram of the internal structure of the timing controller of the display apparatus according to the present invention, showing the structure of a single bank and a double bank selection drive.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Like reference numerals throughout the specification denote substantially identical components. In the following description, 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.

The display device according to the present invention will be described with reference to an organic light emitting display device (OLED display). However, the display device according to the present invention is not limited to a liquid crystal display device but may be a liquid crystal display device (LCD), an electrophoretic display device (EPD), a plasma display panel (PDP) PDP) and the like.

1 is a schematic configuration diagram of a display device according to the present invention.

The display device according to the present invention is a display device designed as a double bank. The display device according to the present invention is a display device designed as a double bank, And can be selectively driven as a single bank according to the type of the signal.

1, a display device according to the present invention includes a display panel 100 having a plurality of gate lines GL1 to GLn and a plurality of data lines DL1 to DLm, a plurality of gate lines GL1 to GLm, Gate drivers 110 and 120 for driving the data lines DL1 to DLm and upper and lower data drivers 130 and 140 for driving the plurality of data lines DL1 to DLm, A timing controller 200 for controlling a single bank driving and a double bank driving according to the kind of an image by controlling an external image and controlling the timing controller 200, And a supply voltage generation unit 400 (VDD) for supplying a supply voltage necessary for driving the pixels on the display panel 100. The host system 300 includes a display panel 100,

The display panel 100 includes a plurality of pixels arranged in a matrix. The display panel 100 is arranged so that a plurality of gate lines GL1 to GLn and a plurality of data lines DL1 to DLm cross each other.

The display panel 100 may be divided into a light emitting region (not shown) in which an image is substantially output and a non-light emitting region in which no image is output.

One gate line GL, one data line DL, and a supply voltage line (not shown) may be disposed in each pixel (not shown). Each pixel (not shown) may include a first transistor electrically connected between a gate line GL, a data line DL, and a first node (not shown).

The pixel is provided with a first node, a supply voltage line and a second node

A second transistor electrically connected to the first transistor may be included. A storage capacitor (not shown) may be formed between the first and second nodes. Each pixel may include an organic light emitting diode (OLED) (not shown) electrically connected to the second node.

The timing controller 200 TCON controls the gate drivers 110 and 120 by using synchronous signals (not shown) and clock signals (not shown) input from an external host system 300 And generates a data control signal (DCS) to control the gate control signal (GCS) and the upper and lower data drivers 130 and 140.

The timing controller 200 receives image data (DATA) in units of frames from an external host system 300. The video data in frame units is rearranged in the timing controller 200 in accordance with the driving mode of the display panel 100 and supplied to the upper and lower data drivers 130 and 140.

The supply voltage generating unit 400 (VDD) supplies a supply voltage necessary for driving the pixels on the display panel 100 and supplies the supply voltage to the display panel through a supply voltage line (not shown).

The OLED supply voltage generating unit supplies a low potential supply voltage to an organic light emitting diode (OLED) of the display panel 100, and the organic light emitting diode OLED is turned on by the supply voltage. (ON) state and emits light. That is, while the supply voltage control signal is supplied from the timing controller 200 to the OLED supply voltage generator (not shown), the organic light emitting diode OLED receives the supply voltage and generates light. That is, the OLED supply voltage generating unit (not shown) generates a supply voltage necessary for driving the pixels on the display panel 100 and supplies the supply voltage to the display panel 100 through a supply voltage line .

The supply voltage generating unit 400 selectively outputs the supply voltage to the upper and lower data drivers 130 and 140 connected to the display panel 100 through the power block 410.

On the other hand, a supply voltage line (not shown) for supplying the supply voltage to the display panel 100 is branched to a plurality of high potential lines on the display panel, and is commonly connected to pixels formed for each column (vertical line) have. That is, in the display panel 100, a high-potential line branched from the supply voltage line is formed for each column (vertical line) in the light emitting region and the non-light emitting region of the display panel. In particular, the high-potential line formed in the non-emission region of the display panel may be branched from the supply voltage line and connected to each column-specific pixel of the emission region.

Fig. 2 is a configuration diagram of a single bank and a double bank selection drive of the display device according to the present invention.

2, the timing controller 200 (TCON) includes an image analyzer 210 for analyzing image data provided from a host system 300, a signal controller 220 for controlling a signal according to the analyzed image type, And an internal interface (EPI) 250 and 252 for enabling the output signals from the signal controller 240 to be output to the data drivers 130 and 140.

The timing controller 200 analyzes the image input from the host system 300 through the image analysis unit 210 and outputs the analyzed data to the data drivers 130 and 140 through the first and second power blocks 412 and 414 (En).

When the image input to the timing controller 200 is analyzed as a moving picture or a picture, the timing controller 200 outputs a control signal for selecting a single bank driving so that the upper and lower data drivers 130 and 140 (En), and the other data driver is disabled (Disable). At this time, power consumption is reduced by disabling one data driver. In other words, it is possible to limit the internal interface (EPI) output to the other data driver and disable the power supply from the power block 410.

Meanwhile, when the image input to the timing controller 200 is a simple still image and a special pattern, the timing controller 200 outputs a control signal for selecting a double bank driving so that the upper and lower data drivers 130 , And 140 (En).

The power block 410 includes first and second power blocks 412 and 414 connected to the upper and lower data drivers 130 and 140. The first and second power blocks 412 and 414 And selectively outputs the supply voltage to the upper and lower data drivers 130 and 140 connected to the display panel 100.

A driving method of a display apparatus according to the present invention having the above-described configuration will now be described with reference to FIG.

Fig. 3 is a block diagram of the internal structure of the timing controller of the display apparatus according to the present invention, showing the structure of a single bank and a double bank selection drive.

3, an image analysis unit 210 constituting the timing controller 200 includes a frame storage unit 210 for storing an image input from the host system 300, Or an image judging unit 230 for judging whether the image is a simple photograph, a simple still image, a monochromatic image or a simple pattern.

The image determination unit 230 includes a moving picture unit 232 for determining whether the image input to the frame storage unit 210 is a moving picture, a photographing unit 234 for determining whether the input image is a complicated picture, And a simple pattern unit 236 for determining whether the captured image is a simple still image other than a moving image and a complex image, or whether it is a monochromatic or simple pattern.

The moving picture section 232 includes an image comparing section 232a for comparing the previous image with the current image to compare the current image with the previous image and comparing the previous image with the current image, And a moving image determining unit 232c for determining that the moving image is a moving image when another image is held for a few seconds.

At this time, if the current image and the previous image are different from each other and this state does not last for several seconds, the image is sent again to the image comparing unit 232a, which is the previous step, and the above process is performed again.

If the previous image and the current image are determined to be the same image in the moving image section 232, the photograph section 234 compares adjacent data in the image and compares different data with each other based on the whole image A data comparing unit 234a, a time duration unit 234b for counting the time when different data are not in a range of several tens% or less, and a picture determining unit 234b for determining the picture as a picture when the state continues for several seconds 234c.

At this time, in the image comparing unit 232a of the photographing unit 232, a threshold value for how much the image difference occurs in the adjacent data comparison in the image can be set separately. If the state in which different data is not less than several tens% is not maintained for a few seconds, the data is sent to the data comparison unit 232a, which is a previous step, and the above-described process is performed again.

In addition, the simple pattern unit 236 judges the still image, the monochrome image, or the simple pattern when the data different from the adjacent data in the image from the photographic unit 234 is several tens% or less.

Referring to FIG. 3, when an image stored in the frame memory unit 220 through the image analysis unit 210 in the timing control unit 200 is judged to be a moving image or a complicated photograph, a single bank is driven The control signal to be selected is output to the outside from the signal control unit 240 in the timing controller 200 and is transmitted to one of the first and second internal interfaces EPI 250 and 252, And the first internal interface (EPI) 252 is output only to the upper data driver 130 to be driven in a single bank.

At this time, the control signal for selecting the single bank driving is disabled in the second internal interface (EPI) 252, and the power of the lower data driver 140 is limited. In this case, power may not be applied to the lower data driver 140, the timing controller 200 may not output a control signal to the lower data driver 140, or the logic in the lower data driver 140 Logic " part can be disabled.

Accordingly, when the image input from the outside is determined to be a moving image or a complicated photograph, the timing controller 200 outputs a control signal for selecting the single bank drive to only one of the first and second internal interfaces (EPI 250 and 252) , And the upper and lower data drivers 130 and 140 so that the display device is driven in a single bank.

3, an image stored in the frame memory unit 220 through the image analysis unit 210 in the timing controller 200 may be a still image other than a moving image or a complex image, and a specific pattern, A control signal for selecting the double bank driving is output to the outside of the timing controller 200 to control the first and second internal interfaces (EPIs 250 and 252) EPIs 250 and 252 and the first and second EPIs are output to the upper and lower data drivers 130 and 140 to drive a double bank.

Accordingly, when the image input from the outside is determined to be a simple still image other than a moving image or a complex photograph, and a special pattern, that is, a monochromatic or simple pattern, the double bank driving is selected through the signal controller 240 in the timing controller 200 (EPI) 250 and 252, and the power is applied to the upper and lower data drivers 130 and 140, so that the display device performs the DUT bank driving.

As described above, according to the display device of the present invention, since the driving concept module of the double bank of the very large display device due to the limitation of the driving capability of the driving driver circuit is selectively driven in the single bank and the double bank The power consumption can be reduced.

Particularly, the present invention is driven by a single bank when a user drives a moving image or a complicated photograph which is difficult to recognize a luminance difference, and can be driven by a double bank when other simple still images and special patterns are input. So that the power consumption can be effectively reduced.

Although the embodiments have been described with reference to the drawings, the present invention is not limited thereto.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention.

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 should be construed as falling within the scope of the present invention.

100: display device 110: gate driver
130: upper data driver 140: lower data driver
200: timing controller 210: image analysis unit
220: frame memory unit 230:
240: Signal controller 250, 252: Internal interface (EPI)
300: Host system

Claims (19)

A display panel having a plurality of gate lines and a plurality of data lines;
A gate driver for driving the gate lines;
Upper and lower data drivers for driving the data lines;
A timing controller for controlling the gate driver, the upper and lower data drivers, analyzing an image applied from the outside, and selecting a single bank drive and a double bank drive according to a type of an image; And
And a supply voltage generator for applying a voltage to the upper and lower data drivers. The apparatus of claim 1, wherein the timing controller comprises: an image analyzer for analyzing image data provided from outside; a signal controller for controlling a signal according to the analyzed image type; and a controller for outputting an output signal from the signal controller to a data driver (EPI) that enables (En) the input signal. The display device of claim 1, wherein the timing controller selects a single bank driving when an image input from the outside is analyzed as a moving image or a photograph. 4. The method of claim 3, wherein the timing controller outputs a control signal for selecting a single bank drive to enable (En) only one data driver among the upper and lower data drivers and disable (Dis) the other data driver Display device. The display device according to claim 1, wherein the timing controller selects a double bank driving mode when an image input from the outside is a monochromatic and simple pattern. 6. The method of claim 5, wherein the timing controller outputs a control signal for selecting a double bank operation to enable upper and lower data drivers when the image input from the outside is a simple still image and a special pattern En). [2] The apparatus of claim 1, wherein the image analyzer constituting the timing controller comprises: a frame storage unit for storing an image input from the outside; and an image analyzing unit for determining whether the input image is a moving image or a complicated photograph, And an image judging section for judging whether or not the image is displayed. 8. The apparatus of claim 7, wherein the image determining unit comprises: a moving picture unit for determining whether the image input to the frame storing unit is a moving image; a photographing unit for determining whether the input image is a complicated photograph; A simple pattern portion for judging whether or not it is a simple still image other than a picture and a monochromatic or simple pattern. 9. The apparatus of claim 8, wherein the motion picture unit comprises: an image comparison unit comparing the previous image and the current image to compare the previous image and the current image; and an image maintaining unit for maintaining the state of the current image for a few seconds And a video determination unit that determines the video as a video when another video is maintained for a few seconds. [9] The method of claim 8, wherein, if the previous image and the current image are identical to each other in the moving image part, the photographing part compares adjacent data in the image and compares the data with each other, And a picture judging unit for judging a picture as a picture when the state lasts for a few seconds. Providing a display panel having a plurality of gate lines and a plurality of data lines;
Connecting a gate driver for driving the gate lines and an upper and lower data driver for driving the data lines to the display panel; And
And selecting the single bank driving and the double bank driving of the display device according to the kind of the image by analyzing the image applied from the outside. The driving method according to claim 11, wherein when a video input from the outside is analyzed as a moving picture or a picture, a control signal for selecting a single bank driving is outputted through a timing controller. 13. The method as claimed in claim 12, wherein the timing controller outputs a control signal for selecting a single bank drive to enable (En) only one data driver among the upper and lower data drivers and disable A method of driving a display device. 13. The driving method of claim 12, wherein when the image input from the outside is a monochrome or simple pattern, a control signal for selecting a double bank driving is outputted through a timing controller. 15. The driving method according to claim 14, wherein the timing controller outputs a control signal for selecting a double bank driving to enable all of the upper and lower data drivers. 13. The driving method of claim 12, wherein the timing controller stores an image input from the outside, and determines whether the stored image is a moving image, a complex photograph, or other simple still images and a monochromatic or simple pattern. 13. The display device according to claim 12, further comprising: a display controller for comparing the previous image and the current image through the timing controller to compare the current image with the current image, . 13. The method of claim 12, wherein when the previous image and the current image are determined to be the same image through the timing controller, the neighboring data in the image are compared to compare different data on the basis of the entire image to several tens% Counting the time when the data is not several tens% or less, and judging from a photograph when the state lasts for several seconds. 13. The method of claim 12, wherein if the previous and current images are identical to each other through the timing controller, the adjacent data in the image are compared and if the different data is less than a few tens percent, Of the display device.

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