KR100860749B1 - Lcd display device having data line shared by rgb unit pixels - Google Patents

Abstract

An LCD(Liquid Crystal Display) having a data line shared by RGB unit pixels is provided to reduce the number of required gate signals and gate drivers significantly, thereby significantly increasing layout efficiency. In an LC panel(100), three RGB(Red, Green, Blue) unit pixels connected to the same data line specifying a row configure one pixel set. A gate driver(200) includes plural gate drivers for generating corresponding gate signals. A source driver(300) includes plural source drivers for supplying image data sets corresponding to the pixel set. The image data set includes three unit image data corresponding to the three unit pixels configuring the one pixel set. The three unit image data is supplied to the data line in each data area time-divided within a unit data section.

Description

LCD display device having data line shared by RGB unit pixels}

In order to more fully understand the drawings used in the detailed description of the invention, a brief description of each drawing is provided.

1 is a view for explaining a liquid crystal panel of a conventional liquid crystal display device.

FIG. 2 is a diagram for describing a data supply method in the liquid crystal panel of FIG. 1.

3 is a view showing a liquid crystal display device according to an embodiment of the present invention.

4 is a diagram illustrating an example of implementing the liquid crystal panel of FIG. 3.

5 is a diagram illustrating a pixel set of the liquid crystal panel of FIG. 4.

FIG. 6 is a diagram for describing a data supply method in the liquid crystal panel of FIG. 4.

FIG. 7 is a diagram illustrating another example of implementing the liquid crystal panel of FIG. 4.

FIG. 8 is a diagram for describing a data supply method in the liquid crystal panel of FIG. 7.

The present invention relates to a display device, and more particularly to a liquid crystal display device that can improve layout efficiency.

Recently, liquid crystal display devices including liquid crystal panels such as OLEDs and LCDs have been widely used in electronic devices. The liquid crystal panel included in the liquid crystal display device includes a plurality of unit pixels arranged in a matrix of rows and columns. In this case, three unit pixels for R, G, and B constitute a set of pixel sets. That is, the three unit pixels for R, G, and B emit light according to the unit image data of R, G, and B, which respectively form a set of image data sets. Then, the image image is displayed by a combination of the light emitted from the three unit pixels for the R, G, B.

1 is a view for explaining a liquid crystal panel of a conventional liquid crystal display device. In FIG. 1, for convenience of description, a liquid crystal panel composed of 27 unit pixels arranged in nine rows and three columns is shown. In the liquid crystal panel of FIG. 1, three unit pixels connected to the same row are composed of a set of pixel sets. In this case, the three unit pixels are set as unit pixels for R, G, and B, respectively. In Fig. 1, unit pixels for R, G, and B are shown as Ri, Gi, and Bi, respectively, with subscripts added to the letters R, G, and B, respectively. In this case, the unit pixel to which the same subscript is added constitutes a set of pixel sets. For example, the unit pixels R1, G1, and B1 constitute a pixel set PPX_SET1, and the unit pixels R9, G9, and B9 constitute a pixel set PPX_SET9. The liquid crystal panel of FIG. 1 is composed of a total of nine pixel sets.

Meanwhile, data supply to the unit pixels for R, G, and B is supplied through data lines DL1, DL2, and DL3 that are separate from each other. Therefore, as shown in FIG. 2, unit image data for R, G, and B are simultaneously supplied during one unit data period tDATA in which the gate signal GLi of the corresponding row is activated.

However, in the conventional liquid crystal display of FIG. 1, the same number of gate signals as the number of rows of the liquid crystal panel is required, and the number of gate drivers generating the gate signals is equal to the number of rows of the liquid crystal panel. Required. In general, the number of rows of liquid crystal panels of the liquid crystal display device is quite large. For example, when the number of rows of the liquid crystal panel is 510, 510 gate signals and a gate driver are required.

Therefore, in the liquid crystal panel of the conventional liquid crystal display device of FIG. 1, since a large number of gate drivers are required, layout efficiency is lowered accordingly.

Accordingly, an object of the present invention is to solve the problems of the prior art, and to provide a liquid crystal display device which reduces the number of gate drivers and increases layout efficiency.

One aspect of the present invention for achieving the above technical problem relates to a liquid crystal display device. The liquid crystal display device of the present invention is a liquid crystal panel including a plurality of unit pixels arranged on a matrix structure of rows and columns, wherein the three unit pixels (R, G, B) connected to the same data line specifying the column. The liquid crystal panel constituting the set of pixel sets, wherein the pixel set is specified by a corresponding main selection signal, and the unit pixels constituting the set of pixel sets are specified by a corresponding auxiliary selection signal panel; A gate driver portion including a plurality of gate drivers for generating corresponding gate signals, the gate signals being provided as the main selection signal of a corresponding pixel set and the auxiliary selection signal of a corresponding unit pixel; And a source driver unit including a plurality of source drivers configured to supply an image data set corresponding to the pixel set in a unit data section in which the main selection signal of a row corresponding to the corresponding data line is activated. The image data set includes three unit image data corresponding to the three unit pixels constituting the set of pixel sets. The three unit image data are supplied to the data line in respective data regions time-divided within the unit data section.

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings which illustrate preferred embodiments of the present invention and the contents described in the accompanying drawings. In understanding the drawings, it should be noted that like parts are intended to be represented by the same reference numerals as much as possible. In addition, detailed description of well-known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention are omitted.

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

3 is a view showing a liquid crystal display device according to an embodiment of the present invention. Referring to FIG. 3, the liquid crystal display device of the present invention includes a liquid crystal panel 100, a gate driver 200, and a source driver 300.

The liquid crystal panel 100 includes unit pixels on a matrix structure of rows and columns. 4 is a diagram illustrating the liquid crystal panel 100 of FIG. 3.

In FIG. 4, as in FIG. 1, 27 unit pixels arranged in nine rows and three columns are illustrated for convenience of description. In the liquid crystal panel of FIG. 4, three unit pixels connected to the same column are configured as a set of pixel sets.

Referring to FIG. 4, the unit pixel and the pixel set shown in the liquid crystal panel 100 are described in detail. In Fig. 4, the unit pixels for R, G, and B are shown as Rij, Gij, and Bij, respectively, with subscripts added to the letters R, G, and B, respectively. In addition, unit pixels to which the same subscript is added constitute a set of pixel sets. And the liquid crystal panel of FIG. 4 also consists of a total of 9 pixel sets similarly to the liquid crystal panel of FIG.

Referring to FIG. 4, a set of pixel sets NPX_SETij is configured by three unit pixels Rij, Gij, and Bij for R, G, and B data connected to the same column, that is, the same data line. do. That is, a set of pixel sets NPX_SETij is composed of three unit pixels Rij, Gij, and Bij for R, G, and B data arranged in a stack along the column direction. For example, R11, G11, and B11 located at the upper left constitute the pixel set NPX_SET11, and R33, G33, and B33 located at the lower right constitute the pixel set NPX_SET33.

In this case, the pixel set NPX_SETij is specified by the main selection signal MSEL, and the unit pixels Rij, Gij, and Bij constituting the set of pixel sets NPX_SETij are corresponding to the auxiliary selection signal ASEL. Is specified.

In the case of the pixel set NPX_SET11 on the upper left, the gate signal GL1 is provided as the main select signal MSEL. The gate signal GL2, the gate signal GL3, and the gate signal GL4 are respectively provided as the auxiliary selection signals ASEL for specifying the R, G, and B pixel pixels R11, G11, and B11.

FIG. 5 is a diagram illustrating a pixel set of the liquid crystal panel 100 of FIG. 4. In FIG. 5, the pixel set NPX_SET11 disposed first in the column direction and the first in the row direction and three unit pixels R11, G11, and B11 constituting the pixel set are shown.

Referring to FIG. 5, the pixel set NPX_SET11 is composed of three unit pixels R11, G11, and B11 arranged in a stack in the column direction. In this case, the gate signal GL1 is provided as the main selection signal MSEL of the pixel set NPX_SET11. The auxiliary selection signals ASEL specifying the R unit pixel R11, the G unit pixel G11, and the B unit pixel B11 are respectively a gate signal GL2, a gate signal GL3, and a gate. Signal GL4 is provided.

In the general case, the gate signals provided to the auxiliary select signals ASEL of the pixel set NPX_SETij arranged in the i-th in the column direction are respectively (i + 1) to (i + 3) th. Gate signals provided to the main select signals MSEL of the pixel set. That is, the gate signals provided as the auxiliary selection signals ASEL of the pixel set NPX_SETij may include the main selection signal MSEL of a pixel set other than the pixel set NPX_SETij including the unit pixel corresponding thereto. Is a gate signal.

Meanwhile, the unit pixels R11, G11, and B11 employed in the liquid crystal display of the present invention include the light emitting unit 10, the first transistor 20, and the second transistor 30, respectively. The light emitting unit 10 actively emits light by flowing current.

The first transistor 20 is formed between the data line DL1 and the light emitting unit 10 and is gated to the main select signal MSEL. The second transistor 30 is formed in series with the first transistor 20 between the data line DL1 and the light emitting unit 10, and is gated by the auxiliary select signal ASEL. .

5, the R unit pixel R11, the G unit pixel G11, and the B unit pixel B11 of the pixel set NPX_SEL11 are commonly connected to one data line DL1. Receive data. That is, one data line DL1 is shared among the unit pixels for R, G, and B.

The supply of data to the R unit pixel R11, the G unit pixel G11, and the B unit pixel B11, which are commonly connected to one data line DL1, may be performed in a time-divisional data supply manner. Is performed.

FIG. 6 is a diagram for describing a data supply method in the liquid crystal panel of FIG. 4. In FIG. 6, data supply to unit pixels connected to the data line DL1 is illustrated as an example.

Referring to FIG. 6, a gate signal provided as one main selection signal MSEL for selecting a specific pixel set is activated during one unit data period tDATA. On the other hand, while one main select signal MSEL is activated, non-overlapping gate signals provided as auxiliary select signals ASEL specifying three unit pixels included in the specified pixel set are activated. .

For example, while the gate signal GL1, which is the main selection signal MSEL of the pixel set NPX_SET11, is activated (p11), the unit pixels R11, G11, and B11 included in the pixel set NPX_SET11 are disposed. The gate signal GL2, the gate signal GL3, and the gate signal GL4, which are the auxiliary selection signals ASEL, are nonredundant and sequentially activated (t11, t12, t13). While the gate signal GL2, the gate signal GL3, and the gate signal GL4 are activated, their unit image data is provided to the unit pixels R11, G11, and B11. In the present specification, unit image data provided to unit pixels constituting a set of pixel sets is referred to as an 'image data set'.

Preferably, the activation of the gate signal GL2, the gate signal GL3, and the gate signal GL4 provided as the auxiliary selection signal ASEL is provided with a slight space so as not to overlap, and the activation width is R respectively. It can be adjusted to correspond to the luminance of the G, B data.

As described above, while one main select signal MSEL is activated, the gate signals provided as auxiliary select signals ASEL specifying three unit pixels included in the specified pixel set are non-redundant. By activating and supplying data, the liquid crystal panel of the liquid crystal display device of the present invention displays an image according to the corresponding image data set.

Next, the number of gate signals required in the liquid crystal display device of the present invention will be described. For example, as shown in FIG. 4, assuming a liquid crystal panel having nine rows, one main select signal MSEL is required for every three rows. Therefore, there are 3 (= 9/3) gate signals provided as the main select signal MSEL. However, for the bottom pixel set, three gate signals provided as the auxiliary selection signal ASEL are additionally required. Therefore, a total of 6 (= 9/3 + 3) gate signals required in the case of FIG. 4 is reduced, compared with the conventional case of FIG.

If it is assumed that the liquid crystal panel of the liquid crystal display device of the present invention is composed of 510 rows, 173 (= 510/3 + 3) gate signals and a gate driver are required. This is a significantly reduced number compared to the conventional liquid crystal display device which requires 510 gate signals and a gate driver.

As a result, according to the liquid crystal display device of the present invention, layout efficiency is remarkably increased as compared with the conventional liquid crystal display device.

Referring back to FIG. 3, the gate driver 200 includes a plurality of gate drivers (not shown) for generating corresponding gate signals GL. The gate signals GL provided from the gate driver unit 200 are provided as the main selection signal MSEL of the corresponding pixel set and the auxiliary selection signal ASEL of the corresponding unit pixel. As shown.

The source driver 300 sequentially stores the image data set (that is, three unit image data) corresponding to the pixel set in a predetermined unit data section with the corresponding data line DL. The supply box is also as described above.

The controller 400 controls the gate driver 200 to appropriately activate the gate signals according to the received global clock signal GCLK and the control command CMD, and also controls the source driver 300 to control the image. The unit image data provided from the data provider 500 is appropriately supplied to the corresponding data line.

Meanwhile, in the liquid crystal panel of FIG. 4, the gate signals provided as the main selection signal MSEL and the auxiliary selection signal ASE may be allocated in various ways.

FIG. 7 is a diagram illustrating another example of implementing the liquid crystal panel of FIG. 4. In the case of the pixel set NPX_SET11 on the upper left in the liquid crystal panel of FIG. 7, the gate signal GL4 is provided as the main selection signal MSEL. The gate signal GL1, the gate signal GL2, and the gate signal GL3 are used as the auxiliary selection signals ASEL for specifying the R, G, and B unit pixels R11, G11, and B11, respectively.

In this case, the gate signals provided as the auxiliary selection signals ASEL of the pixel set NPX_SETij arranged in the i-th in the column direction are respectively the (i-3) to (i-1) th pixel sets. The gate signals provided as the main select signals MSEL.

 FIG. 8 is a diagram for describing a data supply method in the liquid crystal panel of FIG. 7. In FIG. 8, data supply to unit pixels connected to the data line DL1 is illustrated as an example.

Referring to FIG. 8, in the liquid crystal panel of FIG. 7, as in the liquid crystal panel of FIG. 5, a gate provided as one main selection signal MSEL for selecting a specific pixel set during one unit data period tDATA is provided. The signal is activated. On the other hand, while one main select signal MSEL is activated, non-overlapping gate signals provided as auxiliary select signals ASEL specifying three unit pixels included in the specified pixel set are activated. .

For example, while the gate signal GL4, which is the main selection signal MSEL of the pixel set NPX_SET11, is activated (p11), the unit pixels R11, G11, and B11 included in the pixel set NPX_SET11 are disposed. The gate signal GL1, the gate signal GL2, and the gate signal GL3, which are the auxiliary selection signals ASEL, are non-redundant and sequentially activated (t21, t22, t23). While the gate signal GL1, the gate signal GL2, and the gate signal GL3 are activated, their unit image data is provided to the unit pixels R11, G11, and B11.

In the liquid crystal display device of the present invention shown in FIG. 7, also, as in the case of FIG. 5, the number of gate signals and gate drivers required is significantly reduced.

As a result, even with the liquid crystal display device of the present invention of FIG. 7, the layout efficiency is significantly increased as compared with the existing liquid crystal display device.

In the liquid crystal display device of the present invention as described above, a set of pixel sets are implemented by three unit pixels stacked in the column direction. The data line is shared with the unit pixels for R, G, and B to sequentially provide the unit image data. In the liquid crystal display device of the present invention, a gate signal provided as a main selection signal of another pixel set is used as an auxiliary selection signal for selecting unit pixels included in the pixel set.

According to the liquid crystal display device of the present invention, the number of gate signals and the number of gate drivers required are significantly reduced, and the layout efficiency is significantly increased.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (8)

In the liquid crystal display device, A liquid crystal panel comprising a plurality of unit pixels arranged on a matrix structure of rows and columns, wherein the three unit pixels R, G, and B connected to the same data line specifying the column constitute a set of pixel sets. Wherein the pixel set is specified by a corresponding main selection signal, and wherein the unit pixels constituting the set of pixel sets are specified by a corresponding auxiliary selection signal; A gate driver portion including a plurality of gate drivers for generating corresponding gate signals, the gate signals being provided as the main selection signal of a corresponding pixel set and the auxiliary selection signal of a corresponding unit pixel; And A source driver unit including a plurality of source drivers for supplying an image data set corresponding to the pixel set in a unit data section in which the main selection signal of a row corresponding to the corresponding data line is activated; The image data set is Three unit image data corresponding to the three unit pixels constituting the set of pixel sets, The three unit image data And a data line supplied to the data line in a respective data area that is time-divided within the unit data section. The method of claim 1, wherein the three unit pixels included in one pixel set A liquid crystal display device, characterized in that stacked in the direction of the column. The gate signal of claim 1, wherein the gate signal is provided as the auxiliary selection signal. And a gate signal provided as the main selection signal of the pixel set other than the pixel set including the corresponding unit pixel. The gate signal of claim 1, wherein the gate signal is provided as an auxiliary selection signal of the three unit pixels included in one pixel set. And non-redundantly activated while the gate signal provided as the main selection signal corresponding to the pixel set is activated. The method of claim 4, wherein the activation width of the gate signals provided as the auxiliary selection signal is A liquid crystal display device, characterized in that adjustable. The method of claim 1, wherein each of the unit pixels A light emitting unit which actively emits light by flowing current; A first transistor formed between the data line and the light emitting part and gated to the main select signal; And And a second transistor formed in series with the first transistor between the data line and the light emitting part and gated by the auxiliary selection signal. 2. The gate signals of claim 1, wherein the gate signals provided as the auxiliary selection signals of the i-th pixel set in the direction of a column are respectively. and (i + 1) to (i + 3) -th gate signals provided as the main selection signals of the pixel set. 2. The gate signals of claim 1, wherein the gate signals provided as the auxiliary selection signals of the i-th pixel set in the direction of a column are respectively. (i-3) to (i-1) th gate signals provided as the main select signals of the pixel set.

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