KR101119906B1 - Apparatus for image display - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device that reduces the number of data lines, thereby reducing driver ICs and displaying high-quality images. Specifically, the present invention includes red, green, and blue color pixels. A plurality of display pixels arranged in a matrix so as to be divided into three vertical pixel lines; A plurality of data lines which are alternately formed between the plurality of vertical pixel lines and connected to the left and right display pixels closest to each other; It is proposed as a display device which is formed above and below each of the plurality of horizontal pixel lines, and all green color pixels of one horizontal pixel line include a plurality of gate lines connected to the same gate line.

The present invention does not cause streaks due to the high recognition sensitivity of green (G) color in the display device for driving the DGIP has the effect of achieving a more natural picture quality. In addition, since the configuration of each display pixel does not require any separate circuit elements or software changes, it is very easy to design a timing controller for driving a display device. This is because the development time is reduced and productivity is reduced by reducing the number of driver ICs. There is an effect that leads to an improvement.

Description

Display device {Apparatus for image display}

1 is a block diagram showing a basic configuration of a general liquid crystal display device

FIG. 2 is a diagram schematically illustrating a configuration of a liquid crystal panel among the components of FIG. 1.

3 is a block diagram showing a configuration of a display device for driving a conventional DGIP.

4 is a signal timing diagram illustrating a gate driving signal input to drive the display device of FIG. 3.

5 is a configuration diagram showing the configuration of a display device according to a first embodiment of the present invention;

6 is a block diagram showing a configuration of a display device according to a second embodiment of the present invention.

<Brief description of the main parts of the drawing>

DL1 ~ DLm: Data Line GL1 ~ GLn: Gate Line

H1, H2, H3: Horizontal pixel line V1, V2, V3: Vertical pixel line

R, G, B: Red, Green, Blue Display Pixel P: Display Pixel

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly, to a display device capable of reducing the number of data lines to reduce driver ICs and display high quality images.

Among display devices, liquid crystal display devices have advantages of small size, thinness and low power consumption and are used in notebook computers, office automation devices, audio / video devices, and the like. In particular, an active matrix type liquid crystal display device using a thin film transistor (hereinafter referred to as "TFT") as a switching element is suitable for displaying dynamic images.

1 is a block diagram showing a basic configuration of a general liquid crystal display device, which is largely divided into a liquid crystal panel 2 and an LCM driving circuit portion 26. [

In each configuration, the interface 10 includes data (RGB Data) and control signals (input clock, horizontal synchronizing signal, vertical synchronizing signal, data enable) input to the LCM driving circuit unit 26 from a driving system such as a personal computer. Signals) and the like are supplied to the timing controller 12. LVDS (Low Voltage Differential Signal) interface and TTL interface are mainly used for data and control signal transmission from the drive system. In addition, the interface function may be collected and used together with the timing controller 12 in a single chip.

As illustrated in FIG. 2, the liquid crystal panel 2 forms a plurality of pixel regions by crossing a plurality of data lines DL1 to DLm and a plurality of gate lines GL1 to GLn on a glass substrate. In the region, a thin film transistor TFT and a liquid crystal LC are configured to display a screen.

The timing controller 12 drives the data driver 18 of the plurality of drive integrated circuits and the gate driver 20 of the plurality of gate driver integrated circuits using a control signal input through the interface 10. Generate a control signal for In addition, the data input through the interface 10 is transmitted to the data driver 18.

The reference voltage generator 16 generates reference voltages of a digital to analog converter (DAC) used in the data driver 18. The reference voltages are set by the manufacturer based on the transmittance-voltage characteristics of the panel.

The data driver 18 selects reference voltages of the input data in response to control signals input from the timing controller 12, and supplies the selected reference voltage to the liquid crystal panel 2 to control the rotation angle of the liquid crystal molecules.

The gate driver 20 performs on / off control of thin film transistors (TFTs) arranged on the liquid crystal panel 2 in response to control signals input from the timing controller 12. The gate driver 20 controls the gate on the liquid crystal panel 2. By sequentially enabling the lines GL1 to GLn by one horizontal synchronizing time, the thin film transistors TFT on the liquid crystal panel 2 are sequentially driven by one line, so that analog image signals supplied from the data driver 18 It is applied to the pixels connected to the thin film transistors (TFTs).

The power supply voltage generator 14 supplies operating power of each component and generates and supplies a common electrode voltage of the liquid crystal panel 2.

In recent years, a liquid crystal display device that displays an image through the general configuration as described above has been developed with a focus on lowering the price of a driver IC that occupies most of the liquid crystal display material cost for low cost. Various methods for reducing the number of data driver ICs applying data signals to the plurality of data lines DL1 to DLm have been proposed.

In particular, a method of reducing the number of data lines by half and sharing a data line with a horizontally adjacent pixel (hereinafter referred to as DGIP) has been proposed. Referring to FIG. 3, a conventional DGIP driving method is described. This will be described.

First, one pixel area in which a single color is displayed is called a display pixel, and each of the red, green, and blue display pixels adjacent to each other of the display pixels is one pixel unit. pixel unit).

Looking at the configuration of the panel shown, two horizontally adjacent sub-pixels are connected to one data line (DL1, DL2, ...) to halve the number of data lines, and also the top and bottom gate line ( Gate lines except for G1 and Gn) are formed in two lines between the horizontal pixel columns. That is, the (GL2, GL3), (GL4, GL5), ..., (GLn-2, GLn-1) th gate lines are configured to be adjacent to each other without forming display pixel columns therebetween. In the device configuration, each subpixel is formed so that the red (R), green (G), and blue (B) patterns are repeated in the horizontal direction, and the display pixels formed on one vertical pixel column are all display pixels of the same color.

Referring to the operation of the display device having the above structure, as shown in FIG. 4, when the gate driving signal V _G is sequentially applied from the highest gate line GL1 to the lowest gate line GLn, the corresponding gate line is applied to the corresponding gate line. All connected display pixels are operated to input video data to each display pixel through each of the data lines DL1 to DLm to represent an image.

When the image is displayed on the display device having the above-described structure, the green (G) color display pixels in the odd-numbered pixel units and even-numbered pixel units (or even-numbered pixel units and odd-numbered pixel units) adjacent to each other in the horizontal direction are respectively. Drives are connected to different gate lines. However, as shown in Equation (1), the green (G) color has a sensitivity of brightness recognized by the human eye among red (R), green (G), and blue (B) color light provided by one pixel unit. Since is a very high color, the luminance difference with respect to the green (G) color appears more clearly between the odd-numbered and even-numbered columns in the vertical direction by the gate driving signal input with parallax.

Therefore, when driving the display device, there is a disadvantage in that it is recognized as if a plurality of vertical lines are formed for the green color having high sensitivity.

Equation (1) Pixel Unit Luminance (Y) = 0.3R + 0.59G + 0.11B

The present invention has been made to solve the above problems, and an object of the present invention is to provide a display device in which a vertical green line is not recognized when driving a DGIP. It is also an object of the present invention to provide a display device that is easy to design a circuit without generating a vertical green line and also to a design of a control circuit that performs the control thereof.

In order to achieve the above object, the present invention includes a plurality of display pixels each including red, green, and blue color pixels, and arranged in a matrix shape to be divided into a plurality of horizontal pixel lines and a plurality of vertical pixel lines; A plurality of data lines which are alternately formed between the plurality of vertical pixel lines and connected to the left and right display pixels closest to each other; A display device is formed above and below each of the plurality of horizontal pixel lines, and all green color pixels of one horizontal pixel line include a plurality of gate lines connected to the same gate line.

In the display device, all of the green color pixels of one horizontal pixel line are connected to a gate line formed above or above the one horizontal pixel line.

In the display device, the display pixel is a liquid crystal display pixel.

In the display device, at least one display pixel connected to the same data line of each horizontal pixel line is connected to different gate lines.

In the display device, the plurality of display pixels of each horizontal pixel line are repeatedly formed in the order of red, green, and blue.

In the display device, the display pixels forming one vertical pixel line are all display pixels of the same color.

In the display device, each of the display pixels is connected to the data line and the gate line through a thin film transistor.

In the display device, the plurality of gate lines may receive a high level signal sequentially from a top gate line to a bottom gate line of the display panel.

Hereinafter, the present invention having the above-described features will be described with reference to the accompanying drawings for a more detailed description.

5 is a configuration diagram illustrating a configuration of a display device according to a first embodiment of the present invention.

According to the configuration, a plurality of display pixels P for emitting red (R), green (G), and blue (B) colored light of various gradations are arranged, and the plurality of display pixels (P) are arranged in a plurality of horizontal pixels. It is arranged in a matrix type so that it can be divided into lines H1, H2, H3, ... and a plurality of vertical pixel lines V1, V2, V3, .... In this case, each of the display pixels P is a liquid crystal display pixel filled with a liquid crystal, and each of the display pixels P includes a thin film transistor TFT for inputting video data and controlling driving switching.

Each horizontal pixel line (H1, H2, H3, ...) is composed of a plurality of pixel units in units of red (R), green (G), and blue (B) color display pixels. The display pixels configured in the vertical pixel lines V1, V2, V3, ... are all arranged to be composed of display pixels emitting the same color light.

With respect to the matrix arrangement of the display pixels P, m data lines DL1 to DLm are formed between the plurality of vertical pixel lines V1, V2, V3,... It is not formed between V1, V2, V3, ...) but is formed every two vertical pixel line intervals. This is a configuration method for reducing the number of data drive ICs by halving the number of data lines formed on the display panel. The video is divided into two display pixels P arranged on the left and right sides of each of the data lines DL1 to DLm. Supply the data.

According to the connection of the display pixels P and the data lines DL1 to DLm as described above, the plurality of gate lines GL1 to GLn are also configured to have characteristics thereof, and the gate lines GL1 to GLn are formed as described above. It is formed on both the upper and lower portions of each of the plurality of horizontal pixel lines H1, H2, H3, ..., and all the display pixels P of one horizontal pixel line H1, H2, H3, ... are It is connected to one of the gate lines formed below.

In the first embodiment of the present invention, all horizontal pixel lines (H1, H2, H3, ..) are used to prevent the generation of the green line in the vertical direction, which is a problem of the display panel for driving the conventional DGIP. Each green (G) color display pixel constituted of the &lt; RTI ID = 0.0 &gt;.) &Lt; / RTI &gt; Is connecting. In addition, two display pixels connected to the same data line in each horizontal pixel line (H1, H2, H3, ...) are connected to different gate lines for inputting unique video data, in particular, green (G). The color display pixels are connected to gate lines (i.e., GL2, GL4, GL6, ...) formed under the horizontal pixel lines H1, H2, H3, ....

The drive of the display panel of the present invention having the above configuration is very simple. That is, as shown in the signal timing of FIG. 4 through the gate driver IC (not shown), the gate driving signal is sequentially applied from the highest gate line GL1 to the lowest gate line GLn of the display panel. In accordance with the output of the gate driving signal, video data is output to each of the data lines DL1 to DLm through a data driver IC (not shown). Of course, since the display pixels P connected to one data line of the same horizontal pixel line H1, H2, H3, ... are connected to different gate lines, all the display pixels P are applied according to the application of the sequential gate driving signal. It is natural that video data can be input to).

As described above, the display device according to the first embodiment of the present invention connects all green (G) color display pixels of one horizontal pixel line (H1, H2, H3, ...) to the same gate line so as to be driven simultaneously. By eliminating the light emission parallax between the green (G) colors in the horizontal direction, the red (R), green (G), and blue (B) color combinations occupy about 60 percent of the brightness sensitivity of the human eye. G) There is an advantage to improve the vertical stripes recognition phenomenon of the color.

6 is a block diagram showing the configuration of a display device according to a second embodiment of the present invention.

Compared to the first embodiment of the present invention, the second embodiment of the present invention differs from the gate line connection structure of the green (G) color display pixel, and the features and driving of the other structures are the same.

In view of the structure, the plurality of gate lines GL1 to GLn are also configured to have characteristics in accordance with the connection between the display pixels P and the data lines DL1 to DLm, and the gate lines GL1 to GLn. ) Are formed on both the upper and lower portions of each of the plurality of horizontal pixel lines H1, H2, H3, ..., and all display pixels P of one horizontal pixel line H1, H2, H3, ... Is connected to one of the gate lines formed above and below.

In the second embodiment of the present invention, all horizontal pixel lines (H1, H2, H3, ...) are configured to prevent the generation of the green line in the vertical direction, which is a problem of the display panel for driving the conventional DGIP. Each green (G) color display pixel is connected to a gate line (ie, GL1, GL3, GL5, ...) formed above each of the horizontal pixel lines H1, H2, H3, .... Of course, the two display pixels connected to the same data line in each horizontal pixel line (H1, H2, H3, ...) are connected to different gate lines for driving the DGIP, in particular, the green (G) color display pixel. It is connected to the gate lines (ie, GL1, GL3, GL5, ...) formed on the horizontal pixel lines (H1, H2, H3, ...). Of course, when the green (G) color display pixel of each horizontal pixel line H1, H2, H3, ... is connected to the gate line formed on the horizontal pixel line H1, H2, H3, ... Naturally, two display pixels connected to the same data line of the horizontal pixel line should be connected to different gate lines (that is, lower gate lines of the horizontal pixel line).

 In the display device according to the second embodiment of the present invention, all green (G) color display pixels of one horizontal pixel line H1, H2, H3, ... are the same as in the first embodiment of the present invention. By connecting to the gate line to be driven simultaneously to eliminate the deviation between the green (G) color in the horizontal direction has the advantage of improving the phenomenon that the vertical stripes are recognized.

The display device according to the present invention as described above does not cause streaks due to the high recognition sensitivity of green (G) color in the display device for driving the DGIP has the effect of realizing a more natural picture quality. In addition, since the configuration of each display pixel does not require any separate circuit elements or software changes, it is very easy to design a timing controller for driving a display device. This is because the development time is reduced and productivity is reduced by reducing the number of driver ICs. There is an effect that leads to an improvement.

Claims (8)

A plurality of display pixels each comprising red, green, and blue color pixels and arranged in a matrix so as to be divided into a plurality of horizontal pixel lines and a plurality of vertical pixel lines; A plurality of data lines which are alternately formed between the plurality of vertical pixel lines and connected to the left and right display pixels closest to each other; A plurality of gate lines formed on and under each of the plurality of horizontal pixel lines, and all of the green color pixels of one horizontal pixel line are connected to the same gate line; Display device including The method according to claim 1, All of the green color pixels of one horizontal pixel line are connected to a gate line formed on an upper portion of the horizontal pixel line or a gate line formed on a lower portion of the horizontal pixel line. The method according to claim 1, One or more display pixels connected to the same data line in each of the horizontal pixel lines are connected to different gate lines. The method according to claim 1, A display device, characterized in that the plurality of display pixels of each horizontal pixel line is formed in order of red, green, blue The method according to claim 1, Display pixels forming one vertical pixel line of the plurality of vertical pixel lines are all display pixels of the same color The method according to claim 1, Each display pixel is connected to the data line, the gate line and a thin film transistor. The method according to claim 1, A display device characterized in that the plurality of gate lines are sequentially input high level signal from the highest gate line to the lowest gate line The method according to claim 1, And the display pixel is a liquid crystal display pixel.

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