KR102460861B1 - Display panel and display device comprising multi type big-pixel - Google Patents

Abstract

The present invention relates to a display panel including multi-type big pixels and a display device including the same. The display panel according to an embodiment of the present invention includes two blue sub-color filters, one red sub-color filter, and one a first big pixel including a green sub-color filter, a second big pixel including one red sub-color filter, one green sub-color filter, one blue sub-color filter, and one white sub-color filter; The big pixels and the second big pixels are alternately arranged, and the sub-color filter includes a first substrate separated by a black matrix.

Description

DISPLAY PANEL AND DISPLAY DEVICE COMPRISING MULTI TYPE BIG-PIXEL }

The present invention relates to a display panel including multi-type big pixels and a display device including the same, and more particularly, to a display panel including various types of big pixels including different sub-color filters and a display device including the same. it's about technology

A display device is a device that visually displays data, and includes a liquid crystal display, an electrophoretic display, an organic light emitting display, an inorganic EL display, and an (Electro Luminescent Display) display. ), Field Emission Display, Surface-conduction Electron-emitter Display, Plasma Display, and Cathode Ray Display. .

On the other hand, a liquid crystal display device (LCD) is an electronic device that converts and transmits various electrical information generated in various devices into visual information by using a change in liquid crystal transmittance according to an applied voltage. The liquid crystal display device can realize low power driving, a thin structure, and excellent image quality, and thus is widely used as an alternative means to overcome the disadvantages of the conventionally used cathode ray tube (CRT).

Such a liquid crystal display may be largely divided into a display unit, a circuit unit, and a backlight unit. The display unit controls the amount of transmitted light to display an image, and the circuit unit applies various signals transmitted from the driving system to the display unit and controls these signals, and the backlight unit is used as a dimming device that evenly irradiates light to the entire display unit.

Specifically, the display unit consists of a liquid crystal interposed between two opposing substrates, and displays an image by changing the arrangement of the liquid crystal by an electric field generated with the liquid crystal interposed therebetween. A polarizing plate is attached to the outside of the two substrates, respectively.

The circuit unit includes various circuit elements and a printed circuit board (PCB) to control the overall driving of the liquid crystal display device.

A backlight unit (BLU) is a light source of a liquid crystal display, and is a light supply device provided because the liquid crystal display does not emit light by itself and is a light receiving element that displays an image by adjusting the transmittance of light coming from the outside.

That is, the liquid crystal display includes a liquid crystal panel in which a plurality of pixels are arranged in a matrix, a driving circuit for driving the liquid crystal panel, and a backlight unit for irradiating light to the liquid crystal panel. Quality is being improved to cope with low power consumption.

As described above, the liquid crystal display device may implement an image by adjusting the light transmittance of the liquid crystal cell according to the grayscale value of the data signal. For this purpose, the display unit may include a color filter. Of course, the organic light emitting diode display may also include a color filter.

The color filter serves to change the wavelength of the light of the backlight unit. Accordingly, the configuration of the color filter may define the color or color characteristics of the liquid crystal display device. On the other hand, in order to implement a color suitable for a specific color coordinate, it is necessary to implement by densely adjusting the area or position of each color disposed on the color filter. In particular, since the aperture ratio of a color filter is directly related to light efficiency, it is necessary to increase the aperture ratio while realizing a color suitable for a specific color coordinate.

An object of the present invention is to provide a display panel and a display device that increase luminous efficiency by increasing an aperture ratio by adjusting the arrangement of each color in a color filter.

An object of the present invention is to increase the aperture ratio by adjusting the area and position of each color constituting the color filter.

An object of the present invention is to output a color suitable for a target color coordinate using a white or blue sub-color filter disposed adjacent to a display device including a color filter having an increased aperture ratio during a rendering process.

A display panel or display device according to an embodiment of the present invention includes a first big pixel including two blue sub-color filters, one red sub-color filter, and one green sub-color filter, and one red sub-color filter, and one a second big pixel including a green sub-color filter, one blue sub-color filter, and one white sub-color filter of A first substrate divided by a matrix is included.

A display panel or display device according to another embodiment of the present invention includes a second substrate on which a plurality of pixel electrodes corresponding to the sub-color filters of the above-described first substrate are disposed one-to-one.

A display device according to another embodiment of the present invention controls a pixel electrode corresponding to a region of a white sub-color filter of a second big pixel to control the luminance of the first big pixel, and controls a gate driver and a data driver for this purpose. It includes a timing controller.

A display device according to another embodiment of the present invention controls the pixel electrode corresponding to the blue sub-color filter region of the first big pixel to control the luminance of the second big pixel, and controls a gate driver and a data driver for this. It includes a timing controller.

When the present invention is applied, the area of the sub color filter constituting the color filter of the display panel is increased, thereby increasing the aperture ratio.

When the present invention is applied, the aperture ratio can be increased by adjusting the area and position of each color constituting the color filter, thereby increasing the light efficiency.

When the present invention is applied, it is possible to increase the light efficiency by increasing the red or green aperture ratio.

The effects of the present invention are not limited to the above-described effects, and those skilled in the art can easily derive various effects of the present invention from the configuration of the present invention.

1 and 2 are views showing the configuration of a liquid crystal display panel according to an embodiment of the present invention.
3 is a diagram showing the arrangement of sub-color filters of four RGBW colors.
4 is a diagram in which arrangement of sub-color filters of four colors of RGBW is configured differently.
5 is a diagram illustrating a configuration in which eight sub-color filters are dispersedly disposed on two big pixels according to an embodiment of the present invention.
6 is a diagram illustrating a configuration in which eight sub-color filters are dispersedly disposed on two big pixels according to another embodiment of the present invention.
7 and 8 are diagrams showing the configuration of a display device according to an embodiment of the present invention.
9 is a view showing arrangement of big pixels according to another embodiment of the present invention.
10 is a diagram showing arrangement of big pixels according to another embodiment of the present invention.

Hereinafter, with reference to the drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily implement them. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

In order to clearly describe the present invention, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar elements throughout the specification. Further, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to components of each drawing, the same components may have the same reference numerals as much as possible even though they are indicated in different drawings. In addition, in describing the present invention, when it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description may be omitted.

In the following, the provision or arrangement of an arbitrary component on the “upper (or lower)” or “top (or below)” of the substrate means that any component is provided or disposed in contact with the upper surface (or lower surface) of the substrate. It is not intended to mean, but is not limited to, the inclusion of other components between the substrate and any component provided or disposed on (or under) the substrate. In addition, in describing the components of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, order, or number of the elements are not limited by the terms. When it is described that a component is “connected”, “coupled” or “connected” to another component, the component may be directly connected or connected to the other component, but other components may be interposed between each component. It should be understood that each component may be “interposed” or “connected,” “coupled,” or “connected” through another component.

1 and 2 are views showing the configuration of a liquid crystal display panel according to an embodiment of the present invention. The liquid crystal display panel 100 is composed of two substrates 1 and 2 . In FIG. 1 , the liquid crystal display panel 100 is formed by a first substrate 1 that is an upper plate disposed on the top, a second substrate 2 disposed on the lower side, and a liquid crystal layer (not shown) disposed between the two substrates. make up Looking at the two substrates in more detail, 100a of FIG. 2 is shown.

The first substrate 1, also referred to as a color filter substrate, includes a sub-color filter 10 representing a plurality of colors, and a black matrix 11 that distinguishes these sub-color filters and blocks light transmitted through the liquid crystal layer. , and a transparent common electrode 12 to which a common electrode is applied is included at the lower end of the first substrate 1 . In the present invention, the height and width of each region can be configured differently according to the color indicated by the sub color filter 10 .

The second substrate 2, also referred to as an array substrate, provides a function of blocking or transmitting light provided by the backlight unit by controlling the rotation of the liquid crystal layer. In one embodiment, a data line (DL) arranged in a vertical direction, a gate line (GL) arranged in a horizontal direction, a transistor T as a circuit arranged at the intersection of these two lines, and The pixel electrode P is connected to the transistor and drives the liquid crystal according to the electrical signal applied to the data line and the gate line.

The pixel electrode P may be implemented in various forms, such as a planar electrode or a comb-shaped electrode. A region in which the pixel electrode P can be disposed also has a width and a height corresponding to the sub-color filter 10 of the first substrate 1 , which is symmetrical, similar, or identical to the sub-color filter 10 . it is composed For example, the gate line and the data line of the second substrate 2 may be disposed corresponding to the region where the black matrix 11 is disposed.

In the case of a liquid crystal display panel, a liquid crystal layer rotating in response to the electrical state of the pixel electrode P is disposed between the two substrates 1 and 2 .

In the present specification, the sub color filter may be arranged to implement R (red), G (green), B (blue), or W (white). Here, in the case of W (white), a sub-color filter may not be disposed or a specific material may be disposed.

In particular, in the present specification, two types of big pixels are configured by grouping sub-color filters of a specific color in the color filter area. The two big pixels include one or more of R, G, B, and W, and increase the aperture ratio in height and width to realize a color suitable for the target color coordinate.

1 and 2 are summarized as follows. The first substrate is a color filter substrate in which two types of big pixels are alternately arranged in various directions, such as horizontally, vertically, or diagonally, as an embodiment. In addition, in the second substrate, a plurality of pixel electrodes corresponding to one-to-one sub-color filters in which the big pixels of the first substrate are subdivided are disposed, in addition to gate lines and data lines necessary for driving the pixel electrodes, and these A thin film transistor in which lines are crossed and connected is disposed. The thin film transistor is electrically connected to the pixel electrode.

In addition, a light control layer is disposed between the first substrate and the second substrate, and includes a liquid crystal layer in an embodiment. In addition to the liquid crystal layer, an organic light emitting layer may be disposed as a light control layer. When a liquid crystal layer is used as a light control layer, there are advantages of mass production technology, ease of driving means, realization of high quality, and realization of a large screen.

Hereinafter, the arrangement of the sub color filters implemented in the color filters will be mainly examined. The color of each sub-color filter is displayed in RGBW, and pixel electrodes are disposed corresponding to the sub-color filter implemented in the color filter on the array substrate, which is the second substrate.

3 is a diagram showing the arrangement of sub-color filters of four RGBW colors. Four color sub color filters are arranged. Each square means a sub-color filter, and it means that a black matrix is arranged around the square. Here, sub-color filters of the same color among RGBW may be configured to be arranged in a row in the vertical direction.

In the configuration of FIG. 3 , the size of the sub color filter of four colors (RGBW) may be adjusted to match color coordinates provided by the entire liquid crystal display panel. A specific color may be expressed using the bundle 30 of sub-color filters corresponding to four colors RGBW. In addition, the width and height of each sub-color filter can be adjusted. Of course, sub-color filters of the same color of RGBW may be arranged in a zigzag manner instead of in a row in the vertical direction.

4 is a diagram in which arrangement of sub-color filters of four colors of RGBW is configured differently. Unlike FIG. 3 , the size of the sub color filter can be adjusted to match a specific color (white color coordinate), and the height is adjusted within one unit 40 composed of four color sub color filters to increase the area. Sub-color filters of different RGBW are arranged. In the configuration of FIG. 4 , the area (opening ratio of white) of the W sub-color filter may be reduced, and the aperture ratio of blue (B) may be increased to match the white color coordinates. In this process, the aperture ratio of R/G decreases.

In other words, in order to increase the color realization rate that matches a specific color coordinate in the process of implementing the arrangement of sub color filters with four colors, the white sub color filter has a relatively smaller area than other RGB sub color filters. When disposing in the unit 40, there is a problem that the aperture ratio is lowered.

Therefore, in order to solve this problem, it is necessary to configure another RGBW instead of a method of configuring RGBW in one unit. In order to realize the color matching the color coordinates in FIG. 4 , it is necessary to increase the ratio of blue. The size of the blue sub-color filter can be increased or W, R, and G can be reduced. However, when the size of the blue sub-color filter is already fixed If it is, W, R, and G can be reduced as shown in FIG. 4 . However, this change has a problem of lowering the overall aperture ratio.

5 is a diagram illustrating a configuration in which eight sub-color filters are dispersedly disposed on two big pixels according to an embodiment of the present invention. Unlike the configuration of FIG. 4 , one W sub-color filter is changed to B. The eight sub-color filters are dispersedly arranged as two big pixels 300a and 300b, and each big pixel is configured to have at least one RGB sub-color filter. In FIG. 5 , one big pixel has a 4x1 configuration. In an embodiment, four sub-color filters are horizontally arranged, and may include a BBRG or RGBW configuration.

The first type big pixel 300a is BBRG, has two blue colors, and includes one sub-color filter for each of R and G. The second type of big pixel 300b is RGBW and is composed of sub-color filters of four colors, respectively. Since the first type big pixel 300a and the second type big pixel 300b are disposed adjacent to each other, a specific pixel of the adjacent pixel can be controlled in the process of rendering the entire color. For example, one or two blue colors may be controlled in the first type big pixel 300a, or the white color of the adjacent second type big pixel 300b may be controlled.

Also, the area of each sub-color filter may be configured differently according to a color. For example, when the area of one sub-color filter is arranged according to size, the order may be R, G, B, and W. Alternatively, G and B may have approximately the same area.

For example, when the widths of the respective sub-color filters are uniform, the heights of the respective sub-color filters may be different. As shown in FIG. 5 , a relationship of R>G>B>W may be established according to the height. Alternatively, G and B may have approximately the same height.

As shown in FIG. 5, when the configuration of the big pixel is arranged with four sub-color filters arranged horizontally, the configuration of the second substrate can be implemented based on the conventional configuration of pixel electrodes, data lines, and gate lines. In addition, in the implementation of the rendering method, the configuration of adjacent big pixels is implemented differently to enable white realization based on the implementation of increasing or narrowing the gap between B and W. The configuration of the big pixel as shown in FIG. 5 may be configured such that one gate line is connected to the pixel electrode in a specific direction.

6 is a diagram illustrating a configuration in which eight sub-color filters are dispersedly disposed on two big pixels according to another embodiment of the present invention. Unlike FIG. 5 , the configuration of the big pixel is a 2×2 configuration, that is, a configuration of 2×2 horizontally and vertically as shown in 300c and 300d . 300c and 300d are the same as in FIG. 5 in that they also include any one of RGBB and RGBW configurations. Two big pixels are configured in a 2x configuration, and in order to use white, the pixel electrodes of the white sub-color filters of other big pixels arranged on the left, right or top and bottom can be operated.

Unlike FIG. 5 , two gate lines may be disposed in the middle or above and below the big pixel. As shown in FIG. 5 , in the implementation of the rendering method, the configuration of adjacent big pixels is implemented differently, so that white is realized based on the implementation of increasing or narrowing the gap between B and W. In the configuration of the big pixel as shown in FIG. 6 , two gate lines are disposed in the middle or above and below the big pixel to be connected to the upper and lower pixel electrodes.

A big pixel of FIG. 5 or 6 serves as a unit for outputting one color, and a data line, a gate line, and a pixel electrode may be disposed on the second substrate 2 corresponding to the big pixel. Accordingly, the color of one pixel in one RGB image may be displayed by controlling the big pixel of FIG. 5 or FIG. 6 . However, in order to more precisely control the luminance, the color may be additionally controlled through a white or blue sub-color filter of another big pixel adjacent to a specific big pixel.

In FIG. 5 , in the first big pixel, a first blue sub-color filter, a second blue sub-color filter, a red sub-color filter, and a green sub-color filter are sequentially arranged from left to right. Also, in FIG. 6 , in the first big pixel, a first blue sub-color filter, a second blue sub-color filter, a red sub-color filter, and a green sub-color filter are sequentially arranged from upper left to lower right.

In FIG. 5 , in the second big pixel, a red sub-color filter, a green sub-color filter, a blue sub-color filter, and a white sub-color filter are sequentially arranged from left to right. Also, in FIG. 6 , in the big pixel, a red sub-color filter, a green sub-color filter, a blue sub-color filter, and a white sub-color filter are sequentially arranged from upper left to lower right.

To summarize: One eight sub-color filters are dispersedly arranged in two types of big pixels, and the number of colors constituting these sub-color filters is 2:2:3:1 R:G:B:W. When there are three blue sub-color filters and 100% of the blue part is used as a reference, the aperture ratios of red (R) and green (G) may increase, and as a result, the overall aperture ratio increases.

In particular, compared with FIG. 4 , when the size of the white sub-color filter is increased, instead of increasing the white aperture ratio, the R/G aperture ratio decreases, resulting in a decrease in luminance. In this case, there is a limit to the expression of a specific color (especially the expression of yellow). That is, compared with FIG. 4 , in the embodiment of FIGS. 5 and 6 , the area of RGBW increases, so that the transmittance can be expected to increase.

R G B W Fig. 4 73.00% 68.00% 100.00% 30.00% Ratio of area occupied by eight sub-color filters in FIG. 5 or FIG. 6 . 100.00% 93.15% 136.99% 41.10%

In Table 1, since the number of RGBWs in the two big pixels is 2:2:3:1, the ratio of the area of each sub-color filter is converted as shown in Table 2.

R G B W Ratio of area occupied by eight sub-color filters in FIG. 5 or FIG. 6 . 100.00% 93.15% 136.99% 41.10% Ratio of area of one sub color filter 50%
(= 100 / 2) 46.575%
(= 93.15/2) 45.66%
(=136.99 / 3) 41.10%
(= 41.10 / 1)

According to Table 2 and Table 3 to be described later, when R, G, B, and W all have the same width, the height of the sub color filter may be set in the order of R>G>B>W. . Alternatively, since there may be little difference in height between G and B, the order may be R>G=B>W. Also, depending on the implementation method, the area may have a difference in the order of R>B>G>W. In addition, if the difference between the largest R and the smallest W is 100% (100:82.2), the difference in area with the W sub-color filter with respect to R is 20% or less, so the aperture ratio can be improved.

In summary, the size of each area of each color of the sub color filter is the largest (50%) in the red sub color filter, the smallest in the white sub color filter (41.10%), and the difference between the red and white sub color filters ((50%) -41.10)x2) may have a difference of 20% or less (about 17.8%) based on the size of the red sub-color filter. Based on Table 2, when looking at one sub-color filter for each color as a reference, the aperture ratio is adjusted so that the size between the red sub-color filter having the largest area and the white sub-color filter having the smallest area is 20% or less. can be seen to improve. In Table 2, when the red sub-color filter is 100%, the difference in the area of each sub-color filter is shown in Table 3.

R G B W Ratio of area of one sub color filter 50%
(= 100 / 2) 46.575%
(= 93.15/2) 45.66%
(=136.99 / 3) 41.10%
(= 41.10 / 1) Size ratio of area when R is set to 100% 100.00% 93.15% 91.326% 82.2%

This difference may be changed during the implementation process, but the ratio of the area or the order of sizes of the sub-color filters constituting the overall big pixel includes the ratios shown in Tables 1 and 2.

That is, when the embodiment of the present invention is applied, the realization rate of a color matching a specific color coordinate is increased by increasing the area occupied by the blue sub-color filter in the entire display panel and reducing the difference in the area of the individual sub-color filters. It is possible to increase the luminous efficiency by increasing the aperture ratio while increasing it. The ratios in Tables 1 to 3 correspond to specific color coordinates, and when the color coordinates are different, the ratios may have different ratios accordingly.

Accordingly, in FIGS. 5 and 6 , since the aperture ratio of the R/G sub-color filter is maximized, the luminance of the R/G can be increased. In addition, since the area of the black matrix is reduced, light transmittance of the entire panel can be increased.

As shown in FIGS. 5 and 6 , by configuring the sub-colli filters of the two types of big pixels to be the same as BBRG and RGBW, the area of the red sub-color filter and the green sub-color filter can be increased to increase the overall aperture ratio. In addition, by maximizing the white sub-color filter, the light transmittance can be increased by about 36.9%. In addition, in order to increase luminance by disposing two blue sub-color filters in any one of the two types of big pixels, the blue sub-color filters may be used. And the ratio of the area of each sub-color filter maintains R>G>B>W or R>G=B>W. G and B may have approximately the same area, or G may be configured to have a slightly larger area than B.

By implementing the two types of big pixels, the overall aperture ratio is improved. In particular, the aperture ratio is improved because the areas of the sub color filter maintain a certain level of uniformity. That is, in FIG. 4 , the area of the sub-color filter of a specific color was small, and thus the aperture ratio was low. However, as shown in FIG. 5 and Table 2, it is possible to increase the aperture ratio of the R/G color by disposing the sub-color filter in the big pixel in two ways.

7 and 8 are diagrams showing the configuration of a display device according to an embodiment of the present invention.

7 is a view showing a display device to which an embodiment of the present invention is applied. The display device 1000 to which the embodiments are applied includes a display panel 100 in which gate lines GL1 to GLn and data lines DL1 to DLm intersect, and a display panel 100 disposed in the display panel 100 . The gate driver 1200 for driving the gate lines, the data driver 1300 for driving the data lines disposed on the display panel 10 , and driving timings of the gate driver 1200 and the data driver 1300 are controlled. and a timing controller 1400 and the like.

In the display panel 100 , each sub-pixel P is defined by crossing the gate lines GL1 to GLn and the data lines DL1 to DLm. The sub-pixel is for displaying one color and may display any one color among red (R), green (G), blue (B), and optionally white (W). The above-described colors may be replaced according to embodiments.

The display panel 100 may be composed of two substrates 1 and 2 as described above with reference to FIG. 1 . As shown in FIG. 2 , on the first substrate among the two substrates, sub-color filters are disposed, and they are separated by a black matrix.

Also, as described above with reference to FIGS. 5 and 6 , there are two types of big pixels constituted by these sub-pixels, and they may be alternately arranged. In the display panel of FIG. 7 , two types of big pixels are alternately arranged. When part 200 is enlarged, it is shown in FIGS. 8 to 10 . The configuration of the sub color filter constituting the big pixel is as shown in FIG. 5 or FIG. 6 .

The first type or first type big pixel (first big pixel or B big pixel) configured on the first substrate may be composed of two blue sub-color filters, one red sub-color filter, and one green sub-color filter. can In addition, the second type or second type big pixel (second big pixel or W big pixel) configured on the second substrate includes one red sub-color filter, one green sub-color filter, one blue sub-color filter, It may consist of one white sub-color filter.

In addition, these two types of big pixels are alternately arranged to constitute a color filter of the first substrate. Alternating means being alternately arranged in one or more of horizontal, vertical, and diagonal directions. 8, which will be described later, shows that two types of big pixels are alternately arranged in the vertical direction. 9 shows the arrangement alternately in the horizontal and vertical directions. 10 is a diagram illustrating a configuration in which two types of big pixels are displaced in a diagonal direction.

Looking at the configuration in more detail, the big pixel consists of a big pixel 300a or 300c of a first type (two blue and one red and green, BBRG) and a big pixel 300b or 300d of a second type (RGBW). are divided Depending on the arrangement of these big pixels, the color arrangement of the entire display panel may be arranged differently. This will be described later.

The data driver 1300 may be implemented with a plurality of source drive integrated circuits (ICs). The data driver 1300 receives digital video data RGB from the timing controller 1400 and applies a second signal to the display panel 100 .

In more detail, the data driver 1300 converts digital video data RGB into a gamma compensation voltage in response to a source timing control signal from the timing controller 1400 to generate a data voltage, and converts the data voltage to a gate signal. is supplied to the data lines DL of the display panel 100 so as to be synchronized with . The data driver 1300 may be connected to the data lines DL of the display panel 100 through a chip on glass (COG) process or a tape automated bonding (TAB) process.

The gate driver 1200 includes a plurality of gate drive integrated circuits that apply signals to gate lines. The gate driver 1200 drives the gate lines GL1 to GLn by sequentially supplying a first signal, for example, a scan signal, to the gate lines GL1 to GLn. Based on the scan signal, the scan signal is sequentially supplied to the gate lines GL1 to GLn.

The timing controller 1400 may be configured on a source printed circuit board (PCB), and the gate drive integrated circuit (hereinafter, referred to as 'gate drive IC') is connected to the display panel using a tape automated bonding (TAB) method. Alternatively, it may be configured on the display panel in a Chip On Glass (COG) method, or may be electrically connected to the display panel in a Chip On Film (COF) method.

The timing controller 1400 receives digital video data (RGB) from an external host system through an interface such as a Low Voltage Differential Signaling (LVDS) interface, a Transition Minimized Differential Signaling (TMDS) interface, and a Mobile Industrial Processor Interface (MIPI) interface. . The timing controller 1400 transmits digital video data RGB input from the host system to the data driver 1300 .

The timing controller 1400 receives timing signals such as image data (RGB), a vertical synchronization signal (Vsync), a horizontal synchronization signal (Hsync), a main clock signal (MCLK), and a data enable signal (DE) from the outside, An image for sub-pixels to apply the gate control signal GCS to the gate driver 1200 based on this timing signal, and to display the data control signal DCS and the above-described image data RGB to the data driver 1300 . Apply data R'G'B'. A plurality of integrated circuits (source drive ICs) constituting the data driver 1300 are controlled to apply signals to data lines within a predetermined area.

In particular, in order for the timing controller 1400 to control luminance, the timing controller 1400 may control blue or white colors constituting the big pixel. For example, in the process of applying the data signal to the big pixel of the first type and the big pixel of the second type, in order to increase the luminance of the big pixel of the first type, The pixel electrode may be operated, and the pixel electrode corresponding to the white sub-color filter of the adjacent second type big pixel may be operated.

Similarly, the timing controller 1400 may operate the pixel electrode corresponding to the white sub-color filter of the second-type big pixel to increase the luminance of the second-type big pixel, and the blue sub of the adjacent first-type big pixel. A pixel electrode corresponding to the color filter may be operated.

That is, in order to control the luminance of the first big pixel, the timing controller 1400 may control the pixel electrode corresponding to the region of the white sub-color filter of the adjacent second big pixel. Also, the timing controller 1400 may control a pixel electrode corresponding to a region of the blue sub-color filter of the first big pixel to control the luminance of the second big pixel. To this end, the timing controller 1400 may control the gate driver 1200 and the data driver 1300 . The timing controller 1400 may control luminance by driving pixel electrodes corresponding to adjacent white or blue sub-color filters in a rendering process for outputting the entire image, and may use this to increase color quality.

The arrangement of big pixels will be described with reference to FIGS. 8 to 10 . However, although the difference in area is not shown in the drawing as in FIG. 5 or FIG. 6, the area of each sub-color filter is R>G>B>W or R>G=B> as shown in Tables 1 and 2 The area may have a difference in the order of W or R>B>G>W.

8 is a diagram illustrating an arrangement of big pixels of a display panel according to an embodiment of the present invention. The arrangement of sub color filters corresponding to each color of the color filter is shown. Also, pixel electrodes are disposed on the display panel corresponding to these sub-color filters. A configuration in which the first type big pixels 301a to 301f and the second type big pixels 302a to 302f are alternately arranged in the vertical direction is shown. First type big pixels (BBRG configuration) 301a In ~301f), B1 and B2 are for distinguishing the two blue sub-color filters, and the actual sub-color filter or the configuration of the pixel electrode may be the same.

In the first type big pixels (composition of BBRG) (301a to 301f) and second type big pixels (composition of RGBW) (302a to 302f), the first type big pixel is controlled to output a specific color. In the process, the pixel electrode of the white (W) sub-color filter of the adjacent second type big pixel may be controlled.

For example, when outputting a predetermined color using the first type big pixel indicated by 301a, the timing controller 1400 controls the second type of big pixel indicated by the adjacent big pixel 302a as indicated by an arrow. A signal may be applied to the data line and the gate line so that white (W) is output by controlling the pixel electrode of the white (W) sub-color filter. As a result, the luminance increases.

In another embodiment, when outputting a predetermined color by using the first type big pixel indicated by 301e, the timing controller 1400 controls the blue color (B1 or B2) of the first type big pixel indicated by 301d. ) A signal may be applied to the data line and the gate line so that blue is output by controlling the pixel electrode of the sub-color filter.

In another embodiment, when outputting a predetermined color using the second type of big pixel indicated by 302a, the timing controller 1400 controls the blue color (B1 or B2) of the first type of big pixel indicated by 301d. A signal may be applied to the data line and the gate line so that blue is output by controlling the pixel electrode of the sub-color filter.

In summary, in order to increase the luminance in the process of outputting a specific color from a big pixel of the first type, a pixel electrode corresponding to a white sub-color filter of a big pixel of a second type adjacent to the big pixel of the first type is driven. The timing controller 1400 may control the gate driver 1200 and the data driver 1300 so that the two types of big pixels output white.

Also, the timing controller 1400 may drive a pixel electrode corresponding to a blue sub-color filter of the same first type big pixel to increase luminance in the process of outputting a specific color from the first type big pixel.

Also, the timing controller 1400 may operate a pixel electrode corresponding to a white sub-color filter of the same second type big pixel to increase luminance in the process of outputting a specific color from the second type big pixel.

In addition, the timing controller 1400 operates the pixel electrode corresponding to the blue sub-color filter B1 or B2 of the adjacent first type big pixel to increase luminance in the process of outputting a specific color from the second type big pixel. Thus, the timing controller 1400 may control the gate driver 1200 and the data driver 1300 so that the first type big pixel outputs blue.

9 is a view showing arrangement of big pixels according to another embodiment of the present invention. The first type big pixels 311a to 311f and the second type big pixels 312a to 312f are alternately arranged in the horizontal and vertical directions.

As shown in FIG. 8 , in the configuration of FIG. 9 , pixel electrodes of white (W) or blue (B1 or B2) subcolors of other types of big pixels adjacent to each other are controlled while a specific type of big pixel outputs a predetermined color. Thus, the luminance can be increased. The timing controller 1400 calculates the composition of the color to be output and the required luminance, and drives the pixel electrode corresponding to the blue sub-color filter of the first type of big pixel or the white sub-color filter of the second type of big pixel to control the luminance. can do.

10 is a diagram showing arrangement of big pixels according to another embodiment of the present invention. The first type big pixels 321a to 321d and the second type big pixels 322a to 322c are diagonally displaced. As described above, the luminance may be controlled by using the white portion of the second big pixels 322a to 322c adjacent vertically.

Referring to FIGS. 8 to 10 , multi-type, that is, two or more types of big pixels are arranged to increase the aperture ratio of white while not reducing the aperture ratio of other colors. When the present invention is applied, the aperture ratio can be increased in matching the color coordinates for white and implementing colors (Y/W) suitable for the specific color coordinates. In a display panel in which two types of big pixel structures are alternately arranged, a pixel electrode corresponding to a white sub-color filter of the second type of big pixel may be driven to adjust luminance.

Two big pixels share one white sub-color filter to output an image, so that the luminance can be adjusted while increasing the aperture ratio. In addition, as shown by comparing FIGS. 4, 5, and 6, the light efficiency can be increased by increasing the aperture ratio of the R/G color.

In the above, although the embodiment of the present invention has been mainly described, various changes or modifications may be made at the level of those skilled in the art. Accordingly, it will be understood that such changes and modifications are included within the scope of the present invention without departing from the scope of the present invention.

100: display panel 200: cluster sub-filter
1000: display device 1200: gate driver
1300: data driver 1400: timing controller

Claims (20)

a first big pixel including two blue sub-color filters, one red sub-color filter, and one green sub-color filter;
A plurality of sub-color filters including 8 sub-color filters as a group including a second big pixel including one red sub-color filter, one green sub-color filter, one blue sub-color filter, and one white sub-color filter including the Big Pixel group of
The sub color filter may include a first substrate divided by a black matrix;
A thin film transistor in which gate lines and data lines intersect and are electrically connected to the thin film transistor, a plurality of pixel electrodes corresponding one-to-one in the region of the sub color filters are disposed, and a second pixel electrode corresponding to the first substrate Board; and
a light control layer disposed between the first substrate and the second substrate;
Within one said big pixel group,
The total area occupied by the sub-color filters for each color is larger in the blue sub-color filter than the red sub-color filter,
and an area occupied by one sub-color filter is larger in the red sub-color filter than the green sub-color filter.
According to claim 1,
and four sub-color filters are horizontally arranged in the first big pixel and the second big pixel.
According to claim 1,
and four sub-color filters of 2x2 are disposed in the first big pixel and the second big pixel horizontally and vertically.
4. The method of claim 2 or 3,
In the first big pixel, a first blue sub-color filter, a second blue sub-color filter, a red sub-color filter, and a green sub-color filter are sequentially arranged from left to right or from upper left to lower right.
In the second big pixel, a red sub-color filter, a green sub-color filter, a blue sub-color filter, and a white sub-color filter are sequentially arranged from left to right or from upper left to lower right,
In the black matrix, an area of a portion disposed in the first big pixel is smaller than an area of a portion disposed in the second big pixel.
According to claim 1,
The light control layer is a liquid crystal layer that rotates in response to an electrical state of the pixel electrode.
According to claim 1,
In the one big pixel group, the area occupied by the one sub-color filter is the largest in the red sub-color filter and the smallest in the white sub-color filter, and the area difference between the red sub-color filter and the white sub-color filter is the same. maintains a difference of 20% or less based on the size of the red sub-color filter.
A first big pixel including two blue sub-color filters, one red sub-color filter, and one green sub-color filter, one red sub-color filter, one green sub-color filter, one blue sub-color filter, and one a plurality of big pixel groups including eight sub-color filters as one group, including a second big pixel including a white sub-color filter of , a thin film transistor in which gate lines and data lines cross and are electrically connected to the thin film transistor, a plurality of pixel electrodes corresponding one-to-one in the region of the sub color filters are disposed, and a first pixel electrode corresponding to the first substrate is disposed. a second substrate, and a light control layer disposed between the first substrate and the second substrate;
In one big pixel group, the total area occupied by the sub-color filters for each color is larger than the blue sub-color filter, and the area occupied by one sub-color filter is that the red sub-color filter is larger than the red sub-color filter. a display panel wider than the green sub-color filter;
a gate driver including a plurality of gate drive integrated circuits for applying a signal to the gate line;
a data driver including a plurality of source drive integrated circuits for applying a data signal to the data line; and
controlling a pixel electrode corresponding to an area of one sub-color filter among a plurality of sub-color filters of the second big pixel or the first big pixel to control the luminance of the first big pixel or the second big pixel; and a timing controller controlling the gate driver and the data driver.
8. The method of claim 7,
and four sub-color filters are horizontally arranged in the first big pixel and the second big pixel.
8. The method of claim 7,
The display device, wherein the first big pixel and the second big pixel are horizontally and vertically four sub-color filters of 2x2 are disposed.
10. The method of claim 8 or 9,
In the first big pixel, a first blue sub-color filter, a second blue sub-color filter, a red sub-color filter, and a green sub-color filter are sequentially arranged from left to right or from upper left to lower right.
In the second big pixel, a red sub-color filter, a green sub-color filter, a blue sub-color filter, and a white sub-color filter are sequentially arranged from left to right or from upper left to lower right,
In the black matrix, an area of a portion disposed in the first big pixel is smaller than an area of a portion disposed in the second big pixel.
8. The method of claim 7,
The light control layer is a liquid crystal layer that rotates in response to an electrical state of the pixel electrode.
8. The method of claim 7,
In the one big pixel group, the area occupied by the one sub-color filter is the largest in the red sub-color filter and the smallest in the white sub-color filter, and the areas of the red sub-color filter and the white sub-color filter. The difference maintains a difference of 20% or less based on the size of the red sub-color filter.
According to claim 1,
The total area occupied by the sub-color filters for each color in the one big pixel group is wide in the order of the blue sub-color filter, the red sub-color filter, the green sub-color filter, and the white sub-color filter;
An area occupied by the one sub-color filter is large in the order of the red sub-color filter, the green sub-color filter, the blue sub-color filter, and the white sub-color filter.
According to claim 1,
The total area occupied by the sub-color filter for each color in the first big pixel among the one big pixel group is the largest in the blue sub-color filter and the largest in the order of the red sub-color filter and the green sub-color filter. display panel.
According to claim 1,
Among the one big pixel group, the total area occupied by the sub-color filters for each color in the second big pixel is the largest area of the red sub-color filter, and the green sub-color filter, the blue sub-color filter, and the white sub-color filter. Wide display panel in the order of color filters.
8. The method of claim 7,
The total area occupied by the sub-color filter for each color in the first big pixel among the one big pixel group is the largest in the blue sub-color filter and the largest in the order of the red sub-color filter and the green sub-color filter. display device.
8. The method of claim 7,
Among the one big pixel group, the total area occupied by the sub-color filters for each color in the second big pixel is the largest area of the red sub-color filter, and the green sub-color filter, the blue sub-color filter, and the white sub-color filter. Wide display in the order of color filters.
The method of claim 7, wherein the timing controller,
A first operation of controlling a pixel electrode corresponding to a region of the white sub-color filter of the second big pixel or a region of a blue sub-color filter of the first big pixel to increase the luminance of a specific color in the first big pixel performing one of the second operations of outputting blue by controlling the pixel electrode corresponding to
A third operation of controlling a pixel electrode corresponding to a region of a white sub-color filter of the second big pixel or a region of a blue sub-color filter of the first big pixel to increase the luminance of a specific color in the second big pixel A display device for controlling the gate driver and the data driver to perform one of a fourth operation for controlling a corresponding pixel electrode.
a first big pixel including two blue sub-color filters, one red sub-color filter, and one green sub-color filter;
A plurality of sub-color filters including 8 sub-color filters as a group including a second big pixel including one red sub-color filter, one green sub-color filter, one blue sub-color filter, and one white sub-color filter including the Big Pixel group of
The sub color filter may include a first substrate divided by a black matrix;
A thin film transistor in which gate lines and data lines intersect and are electrically connected to the thin film transistor, a plurality of pixel electrodes corresponding one-to-one in the region of the sub color filters are disposed, and a second pixel electrode corresponding to the first substrate Board; and
a light control layer disposed between the first substrate and the second substrate;
Within one said big pixel group,
The total area occupied by the sub-color filters for each color is larger in the green sub-color filter than the white sub-color filter,
an area occupied by one sub-color filter, wherein the blue sub-color filter is larger than the white sub-color filter.
a first big pixel including two blue sub-color filters, one red sub-color filter, and one green sub-color filter;
A plurality of sub-color filters including 8 sub-color filters as a group including a second big pixel including one red sub-color filter, one green sub-color filter, one blue sub-color filter, and one white sub-color filter including the Big Pixel group of
The sub color filter may include a first substrate divided by a black matrix;
A thin film transistor in which gate lines and data lines intersect and are electrically connected to the thin film transistor, a plurality of pixel electrodes corresponding one-to-one in the region of the sub color filters are disposed, and a second pixel electrode corresponding to the first substrate Board; and
a light control layer disposed between the first substrate and the second substrate;
Within one said big pixel group,
The total area occupied by the sub-color filters for each color is larger in the blue sub-color filter than the red sub-color filter,
an area occupied by one sub-color filter, wherein the red sub-color filter is larger than the blue sub-color filter.

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