KR20160123440A - A display apparatus - Google Patents

Abstract

Provided is a display device. The display device comprises: a display substrate including a plurality of pixels defined by a plurality of scan lines and a plurality of data lines; a light source for sequentially supplying first color light, second color light, and third color light to the display substrate; and a color filter including a first filter area through which the first color light penetrates, a second filter area through which the second color light penetrates, a third filter area through which the third color light penetrates, and a fourth filter area through which the first color light, the second color light, and the third color light penetrate. The pixels include at least a first pixel overlapped on the first filter area of the color filter, a second pixel overlapped on the second filter area of the color filter, a third pixel overlapped on the third filter area of the color filter, and a fourth pixel overlapped on the fourth filter area of the color filter.

Description

[0001]

The present invention relates to a display device, and more particularly, to a flat panel display device.

Generally, a flat panel display selectively transmits a part of light provided from a light source to express a desired image.

A considerable amount of light provided from the light source is absorbed or reflected by various optical layers of the display device and is lost. In terms of light energy, the transmittance of the display device is an important factor for determining the quality of the display device.

A typical display device includes a color filter having a red filter region, a green filter region, and a blue filter region to combine the three primary colors, i.e., red, green, and blue light, to produce a desired image. Since the color filter transmits light of a specific wavelength band and blocks or absorbs light of the remaining wavelengths, the presence of the color filter can be a great factor for decreasing the transmittance of the display device.

In order to increase the transmittance by excluding the color filter from the display device, the light source distinguishably provides red light, green light and blue light to the display panel, and the display panel emits red light, green light, There was an attempt to express the desired image.

However, such an attempt requires high-speed driving of the liquid crystal, but it has difficulty in expressing a high-quality image because the response speed of the liquid crystal is limited, and in particular, the response speed of the liquid crystal is very slow as the temperature is lowered .

Accordingly, an object of the present invention is to provide a display device with improved transmittance.

Another problem to be solved by the present invention is to provide a display device which takes into consideration the slow response speed of liquid crystal at low temperatures.

The problems to be solved by the present invention are not limited to the above-mentioned technical problems, and other problems not mentioned can be attained by those skilled in the art (hereinafter referred to as "Quot;). ≪ / RTI >

According to an aspect of the present invention, there is provided a display device including: a display substrate including a plurality of pixels defined by a plurality of scan lines and a plurality of data lines; A light source for sequentially supplying the first color light, the second color light, and the third color light to the display substrate; A first filter region for transmitting the first color light, a second filter region for transmitting the second color light, a third filter region for transmitting the third color light, and a second filter region for transmitting the first color light, And a fourth filter region through which the third color light is transmitted, wherein the plurality of pixels includes a first pixel overlapping at least a first filter region of the color filter, A third pixel overlapping the third filter region of the color filter, and a fourth pixel overlapping the fourth filter region of the color filter.

On the other hand, the first color light is red light, the second color light is green light, and the third color light is blue light.

The first filter region may be a red filter region for selectively passing red light, the second filter region may be a green filter region for selectively passing green light, and the third filter region may selectively pass blue light. And the fourth filter is a white filter area through which both red light, green light, and blue light pass.

Meanwhile, the light source is a surface light source disposed on the opposite side of the display surface of the display substrate, the light source includes a plurality of blocks arranged in a matrix, and each of the plurality of blocks is capable of adjusting the intensity of light emitted .

The light source includes a plurality of first color LEDs, a plurality of second color LEDs, and a plurality of third color LEDs, and the plurality of first color LEDs, the plurality of second color LEDs, and the plurality of third color LEDs The first color light, the second color light, and the third color light are sequentially supplied to the display substrate by sequentially turning on and off.

On the other hand, the magnitude of the current or voltage provided to each block of the light source can be adjusted differently for each block according to the image corresponding to each block.

The light source includes first to n-th block lines (n is a natural number of 2 or more), each convex line includes one or more rows of the plurality of blocks, and the first to n- And sequentially emits and extinguishes from the one block line to the nth block line.

Meanwhile, the time during which one of the first through n-th block lines emits light and the time during which the next block line emits light are overlapped for the overlap time.

On the other hand, in the mixed field sequential driving mode, during the first sub-frame in which the first color light is provided, the first pixel and the fourth pixel control the degree of transmission of the first color light, and the second pixel and the third pixel And the second pixel and the fourth pixel adjust the degree of transmission of the second color light during the second sub-frame in which the second color light is provided, and the first pixel and the third pixel intercept the first color light, And the third pixel and the fourth pixel adjust the degree of transmission of the third color light during the third sub-frame in which the third color light is provided, and the first pixel and the second pixel intercept the second color light, And blocks the third color light.

On the other hand, in the low temperature field sequential driving mode, the first pixel controls the degree of transmission of the first color light during the first sub-frame in which the first color light is provided, and the second pixel, the third pixel, The first pixel blocks the first color light, the second pixel controls the degree to which the second color light is transmitted during the second sub-frame in which the second color light is provided, and the first pixel, the third pixel, The third pixel blocks the second color light and controls the degree to which the third color light is transmitted during the third sub-frame in which the third color light is provided, and the first pixel, the second pixel, And blocks the third color light.

On the other hand, the display device further includes a temperature sensor, which senses an external temperature, and when the temperature falls below a specific temperature according to the sensed temperature, the display device operates in a low temperature field sequential drive mode, The display device operates in the mixed field sequential drive mode when the temperature is above a certain temperature and in the mixed field sequential drive mode the first pixel and the fourth pixel during the first sub- The second pixel and the third pixel block the first color light, and during the second sub-frame in which the second color light is provided, the second pixel and the fourth pixel adjust the transmittance of the second color light, The first pixel and the third pixel block the second color light, and during the third sub-frame in which the third color light is provided, the third pixel and the fourth pixel are arranged so that the third color light, Permeable The first pixel and the second pixel block the third color light, and in the low-temperature field sequential driving mode, during the first sub-frame in which the first color light is provided, The third pixel and the fourth pixel block the first color light, and during the second sub-frame in which the second color light is provided, the second pixel controls the second color light, The first pixel, the third pixel and the fourth pixel block the second color light, and during the third sub-frame in which the third color light is provided, the third pixel controls the third color light, And the first pixel, the second pixel, and the fourth pixel block the third color light.

The display device may further include an optical sensor, wherein the optical sensor senses an external luminous intensity, and the display device operates in a low temperature field sequential driving mode at night according to the sensed luminous intensity, In the mixed field sequential driving mode, the first pixel and the fourth pixel control the degree of transmission of the first color light during the first sub-frame in which the first color light is provided, The second pixel and the third pixel block the first color light and the second pixel and the fourth pixel control the degree of transmission of the second color light during the second sub-frame in which the second color light is provided, The first pixel and the third pixel block the second color light and during the third sub-frame in which the third color light is provided, the third pixel and the fourth pixel adjust the degree of transmission of the third color light, 1 < / RTI > and 2 < In the low-temperature field sequential driving mode, the degree of transmission of the first color light is adjusted during the first sub-frame in which the first color light is provided, and the second pixel, the third pixel And the fourth pixel block the first color light, the second pixel controls the degree of transmission of the second color light during the second sub-frame in which the second color light is provided, and the first pixel, the third pixel And the fourth pixel block the second color light, and during the third sub-frame in which the third color light is provided, the third pixel controls the degree of transmission of the third color light, And the fourth pixel block the third color light.

The plurality of pixels may further include a fifth pixel and a sixth pixel overlapping the fourth filter region.

Meanwhile, the fourth, fifth, and sixth pixels are applied with data voltages having different gamma voltage curves.

On the other hand, for one gradation between the minimum gradation and the maximum gradation, the data voltages applied to the fourth pixel, the fifth pixel and the sixth pixel are different.

On the other hand, the first pixel, the second pixel, the third pixel, the fourth pixel, the fifth pixel and the sixth pixel are arranged in a matrix shape, and the first column and the fourth pixel are alternately arranged in the column direction A second column in which the fifth pixel and the second pixel are alternately arranged in the column direction, and a third column in which the third pixel and the sixth pixel are alternately arranged in the third direction, wherein the first pixel, The fifth pixel, the third pixel, the fourth pixel, the second pixel, and the sixth pixel are repeatedly arranged.

According to another aspect of the present invention, there is provided a display device including: a display substrate including a plurality of pixels defined by a plurality of scan lines and a plurality of data lines; A first filter region for transmitting the first color light, a second filter region for transmitting the second color light, a third filter for transmitting the third color light, and a second filter region for transmitting the second color light, And a fourth filter region for transmitting the first color light, the second color light, and the third color light, wherein the plurality of pixels are at least overlapped with the first filter region of the color filter A second pixel overlapping a second filter region of the color filter, a third pixel overlapping a third filter region of the color filter, and a fourth pixel overlapping a fourth filter region of the color filter; 5 pixels and a sixth pixel, and the fourth pixel, the fifth pixel and the sixth pixel are applied with data voltages to which different gamma voltage curves are applied.

According to another aspect of the present invention, there is provided a display device including: a display substrate including a plurality of pixels defined by a plurality of scan lines and a plurality of data lines; A first filter region for transmitting the first color light, a second filter region for transmitting the second color light, a third filter for transmitting the third color light, and a second filter region for transmitting the second color light, And a fourth filter region for transmitting the first color light, the second color light, and the third color light, wherein the plurality of pixels are at least overlapped with the first filter region of the color filter A second pixel overlapping a second filter region of the color filter, a third pixel overlapping a third filter region of the color filter, and a fourth pixel overlapping a fourth filter region of the color filter; Fifth, and sixth pixels, wherein the first pixel, the second pixel, the third pixel, the fourth pixel, the fifth pixel, and the sixth pixel are arranged in a matrix, and the first pixel and the fourth pixel A first column in which the pixels are repeatedly arranged alternately, a fifth pixel in the column direction, A second column in which two pixels are repeatedly arranged alternately, and a third column in which a third pixel and a sixth pixel are alternately arranged in a third direction, wherein the first column, the fifth column, the third column, 4 pixels, a second pixel, and a sixth pixel are repeatedly arranged.

According to the embodiments of the present invention, at least the following effects are obtained.

That is, it is possible to prevent deterioration of display quality due to low-speed response characteristics of the liquid crystal at a low temperature while improving the transmittance of the display device.

The effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the specification.

1 is an exploded perspective view schematically showing a display device according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating an example of a full color image that a viewer recognizes when a display device displays a red image, a green image, and a blue image according to an exemplary embodiment of the present invention.
3 is a perspective view illustrating an arrangement relationship of a color filter of a display device, subpixels of a display substrate, and blocks of a backlight unit according to an embodiment of the present invention.
4 is a cross-sectional view illustrating a pixel structure of a display device according to an embodiment of the present invention.
5 is an exemplary perspective view of a backlight unit according to an embodiment of the present invention.
6 is a driving timing diagram of a scan signal and a backlight unit of a display device according to an embodiment of the present invention.
Fig. 7 is an exemplary diagram illustrating that one "main pixel" represents a "red dot ".
Fig. 8 is an exemplary diagram illustrating that one "main pixel" represents a "cyon point ".
Fig. 9 is an example of enlarging a part of a specific image and a display device for displaying a specific image. Fig.
10 is a graph showing changes in the liquid crystal characteristic coefficients that determine the response speed of the liquid crystal with temperature.
FIG. 11 is a graph showing driving of white pixels at room temperature and driving at a low temperature when a white pixel is intended to transmit only red light.
12 is an exemplary diagram illustrating that, in the low temperature field sequential drive mode, one "main pixel " represents a" red dot ".
13 is an exemplary diagram illustrating that, in the low temperature field sequential drive mode, one "main pixel " represents a" Cyon point ".
14 is an exemplary diagram illustrating that, in the low temperature field sequential drive mode, one "main pixel "represents" white point ".
15 is a perspective view illustrating the arrangement relationship of the color filter of the display device, the sub-pixels of the display substrate, and the blocks of the backlight unit according to another embodiment of the present invention.
16 is a cross-sectional view illustrating a pixel structure of a display device according to another embodiment of the present invention.
17 is an exemplary diagram illustrating that one "main pixel" represents "red dot ".
Fig. 18 is an exemplary diagram illustrating that one "main pixel" represents a "green point ".
19 is an exemplary diagram illustrating that one "main pixel" represents a "blue dot ".
20 is an exemplary diagram illustrating that one "main pixel" represents a "white point ".
Fig. 21 is an exemplary diagram illustrating that one "main pixel" represents a "cyan dot ".
FIG. 22 is an exemplary diagram showing a specific image displayed on a display device according to another embodiment of the present invention, and an enlarged view of a part of a specific image. FIG.
23 is an exemplary diagram illustrating that, in the low temperature field sequential drive mode, one "main pixel " represents a" red dot ".
Fig. 24 is an exemplary diagram illustrating that, in the low temperature field sequential driving mode, one "main pixel " represents a" cyon point ".
25 is an exemplary diagram illustrating that in a low temperature field sequential drive mode, one "main pixel " represents a" white point ".
26 is a graph showing the gamma curves applied to each white subpixel and the gamma curve for the luminance of all the subpixels in the display device according to another embodiment of the present invention.
FIG. 27 is an illustration showing an angle at which the liquid crystal corresponding to the first to third white subpixels is tilted with respect to a specific gradation level. FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

In the present specification, the same reference numerals refer to substantially the same configurations.

Although the first, second, etc. are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical scope of the present invention.

In this specification, when an element is referred to as being "connected" to another element, it is to be understood that it may be directly connected to the other element, but connected via another element in between will be. Other expressions that describe the relationship between components, such as "between" or " between "or" neighboring "and" directly adjacent to " will be.

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

1 is an exploded perspective view schematically showing a display device according to an embodiment of the present invention.

1, a display device according to an exemplary embodiment of the present invention includes a display substrate 100, a liquid crystal layer 200, an opposite substrate 300, a backlight unit 400, a color filter CF, 1 polarizing plate POL1 and a second polarizing plate POL2.

The liquid crystal layer 200 may be disposed between the display substrate 100 and the counter substrate 300. The liquid crystal molecules in the liquid crystal layer 200 may vary in the alignment direction and the degree of alignment depending on the direction and intensity of the electric field formed in the liquid crystal layer 200. In the embodiment shown in FIG. 1, the liquid crystal of the liquid crystal layer 200 is shown oriented in the vertical alignment mode (VA). In the vertical alignment mode (VA) and the patterned vertical alignment (PVA) mode and the super patterned vertical alignment (SPVA) mode, the display substrate 100 is provided with a plurality of pixels defined by a plurality of scan lines and a plurality of data lines And the opposing substrate 300 may include a common electrode. The voltage difference between the plurality of pixel electrodes and the common electrode of the plurality of pixels may cause the angle at which the liquid crystals vertically aligned in the liquid crystal layer 200 lie with respect to the vertical direction. Each of the liquid crystals of the liquid crystal layer 200 may have birefringence characteristics different from each other in the long axis direction and the short axis direction of the liquid crystal and the optical axis of the light passing through the liquid crystal layer 200 may vary depending on the degree You can adjust the degree of twisting.

The light provided from the backlight unit 400 to the liquid crystal layer 200 may be light polarized in the first direction (x direction) through the first polarizer POL1 and the liquid crystal layer 200 may be polarized in the first direction x direction) of the polarized light can be distorted, and light having a polarization direction twisted through the liquid crystal layer 200 can be polarized in the first direction (x direction) to the second direction (y direction) have. The second polarizing plate POL2 disposed on the counter substrate 300 may have a transmission axis aligned in the second direction (y direction), and may transmit light of the second direction polarized component of the light passing through the liquid crystal layer 200 And can block the light of the polarization component in the first direction (x direction).

Further, a color filter CF may be disposed on the counter substrate 300. The color filter (CF) includes a red filter region for transmitting red light and absorbing light of different colors, a green filter region for passing green light and absorbing light of different colors, And a blue filter region that absorbs light of color.

In one embodiment of the present invention, the color filter CF may further include a white filter region that passes all of the red, green, and blue light, and the white filter region includes at least a portion of the color filter CF Or may be formed by removing at least a part of the color filter (CF) or not injecting any dye into at least a part of the color filter (CF) which is transparent.

In the display device according to an embodiment of the present invention, the display substrate 100, the liquid crystal layer 200, and the counter substrate 300 are operated in the vertical alignment mode, but the present invention is not limited thereto. In some embodiments, the driving mode of the display panel including the display substrate 100, the liquid crystal layer 200 and the counter substrate 300 can be performed in different driving modes, for example, Multi-Domain Vertical Alignment (MVA) In-Plane Switching (IPS) mode, and Plane to Line Switching (PLS) mode may be used.

1, a display device according to an exemplary embodiment of the present invention includes a backlight unit 400, a first polarizer POL1, a display substrate 100, a liquid crystal layer 200, an opposing substrate 300, The filter CF and the second polarizing plate POL2 are stacked in this order, the present invention is not limited thereto. For example, the color filter CF may be disposed on the lower side of the counter substrate 300, or may be disposed on the opposite side of the counter substrate 300. In this case, May be disposed above and below the substrate 100, or may be embedded within each pixel of the display substrate 100. Further, each of the components illustrated in Fig. 1 can be integrated in a range to which the optical function of each component is applied, for example, the second polarizing plate POL2, the color filter CF, and the counter substrate 300 may be integrally formed and the first polarizing plate POL1 may be incorporated in the backlight unit 400 as one optical film of the backlight unit 400. [

The backlight unit 400 may be a surface light source that sequentially provides red light R, green light G, and blue light B to the display substrate 100. In this case, The display substrate 100 can control the degree to which the polarization axes of red light R, green light G and blue light B sequentially provided to each pixel of the display substrate 100 are distorted, It is possible to adjust the amount of light of each red color, green color, and blue color passing through the polarizing plate POL2. Accordingly, the display device according to an embodiment of the present invention can sequentially display the red image R_IMAGE, the green image G_IMAGE, and the blue image B_IMAGE corresponding to the red, green, and blue light sources, respectively , Viewers can perceive images in which red, green, and blue colors are mixed, that is, temporally dithered images of red, green, and blue as full color images.

FIG. 2 is a diagram illustrating an example of a full color image that a viewer recognizes when a display device displays a red image, a green image, and a blue image according to an exemplary embodiment of the present invention.

Referring to FIG. 2, one frame of the display apparatus according to an exemplary embodiment of the present invention includes a red sub-frame for displaying a red image R_IMAGE, a green sub-frame for displaying a green image G_IMAGE, And a blue sub-frame for displaying a blue sub-frame.

The red data R_Data corresponding to the red image R_IMAGE is loaded by the plurality of pixels of the display substrate 100 and the liquid crystal layer 200 of the liquid crystal layer 200 corresponding to the loaded red data R_Data, Can be arranged. The backlight unit 400 may then provide the red light R to the display substrate 100 and a red image R_IMAGE corresponding to the aligned liquid crystal may be displayed.

Next, in the green sur- face, a plurality of pixels of the display substrate 100 are loaded with the green data G_Data corresponding to the green image G_IMAGE, and the liquid crystal layer 200 is formed so as to correspond to the loaded green data G_Data. Can be arranged. Then, the backlight unit 400 can provide the green light G to the display substrate 100, and a green image (G_IMAGE) corresponding to the arranged liquid crystal can be displayed.

Subsequently, in the blue surveillance, a plurality of pixels of the display substrate 100 are loaded with blue data B_Data corresponding to the blue image B_IMAGE, and the liquid crystal layer 200 is formed so as to correspond to the loaded blue data B_Data. Can be arranged. Then, the backlight unit 400 can provide the blue light B to the display substrate 100, and a blue image B_IMAGE corresponding to the arranged liquid crystal can be displayed.

The viewer can visually recognize an image in which a red image R_IMAGE, a green image G_IMAGE, and a blue image B_IMAGE displayed sequentially is displayed as a full color image FC_IMAGE. For example, An image in which colors are temporally mixed or dithered can be recognized as red, and an image in which black and green colors are mixed or dithered in time can be recognized as a green (G) color, and red, green, (W) color, and an image in which red and blue colors are temporally mixed or dithered can be recognized as a magenta (M) color, and the green and blue colors can be mixed in time Or a cyan (C) color image to be dithered.

3 is a perspective view illustrating an arrangement relationship of a color filter of a display device, subpixels of a display substrate, and blocks of a backlight unit according to an embodiment of the present invention.

3, a backlight unit 400 of a display device according to an exemplary embodiment of the present invention includes a plurality of blocks BL11 to BL68 arranged in a matrix, and includes a plurality of blocks BL11 to BL68 It may be a direct-type light source capable of adjusting the intensity of light emitted. In the present invention, the backlight unit 400 sequentially applies the red light R, the green light G, and the blue light B to the display substrate 100. However, the present invention is not limited thereto, To achieve a desired optical function.

For example, in another embodiment of the present invention, the backlight unit may be an edge-type surface light source comprising at least one red light source, at least one green light source and at least one blue light source disposed on at least one side of the backlight unit.

Further, in another embodiment of the present invention, the backlight unit is not a surface light source that directs the display substrate but includes at least one red light source, at least one green light source, and at least one red light source that directs an object or space opposite the light- And may be an illumination including a blue light source, wherein light reflected on the space on the opposite side of the display substrate or an object thereon may be provided toward the display substrate.

One block BL34 of the backlight unit 400 may be arranged such that a plurality of pixels PX are superimposed and each pixel includes a red filter region, a green filter region, a blue filter region, and a blue filter region of the color filter CF, One of the white filter regions may overlap.

The color filter CF may be arranged with a red filter region, a green filter region, a blue filter region, and a white filter region around one corner. In the present specification, a red filter region, a green filter region, A plurality of pixels respectively superimposed on a white region and a white filter region are referred to as a red subpixel R_SPX, a green subpixel G_SPX, a blue subpixel B_SPX and a white subpixel W_SPX, respectively.

The backlight unit 400 may include a plurality of red LEDs, a green LED, and a blue LED, sequentially lighting and extinguishing a plurality of red LEDs, green LEDs, and blue LEDs, R), green light (G), and blue light (B).

The magnitude of the current or voltage provided to each block of the backlight unit 400 can be adjusted differently for each block, and the magnitude of the voltage or current provided to one block according to the image corresponding to each block is adjusted .

For example, when the display device of the present invention is used as an outdoor billboard, advertisement text or image is displayed at the center of the display device, and a white background image is displayed at the outer portion of the display device, The blocks in the outer portion may be provided with a voltage or current corresponding to the maximum brightness or gradation and the blocks in the central portion of the backlight unit 400 may be provided with a voltage or current corresponding to a relatively small brightness or gradation .

4 is a cross-sectional view illustrating a pixel structure of a display device according to an embodiment of the present invention.

4, a display substrate 100 of a display device according to an exemplary embodiment of the present invention includes a plurality of scan lines SL1 to SLn and a plurality of data lines DL1 to DLm, Green subpixel G_SPX, blue subpixel B_SPX and white subpixel W_SPX connected to the data lines DL1 to DLm and the red subpixels R_SPX, have. The red subpixel R_SPX, the green subpixel G_SPX, the blue subpixel B_SPX and the white subpixel W_SPX can be disposed adjacent to each other around one corner, The subpixel G_SPX can be alternately repeatedly arranged in one direction in one row and the blue subpixel B_SPX and the white subpixel W_SPX can be alternately repeatedly arranged in one direction in another neighboring row .

In the present specification, the "main pixel" corresponds to a unit of one "point" in the raw image data in which a plurality of "points" are gathered to constitute one image, and "subpixel" represents one "main pixel" Corresponding to one of a plurality of points on the display substrate 100 for red subpixel R_SPX, green subpixel G_SPX, blue subpixel B_SPX and white subpixel W_SPX do. In addition, "pixel" corresponds to the pixel structure of the smallest unit represented by the display device like "subpixel ", and" red subpixel R_SPX & Pixel G_SPX "," blue subpixel B_SPX "or" white subpixel W_SPX ". However, the terms "pixel" and "subpixel" refer to the same unit of element and are used interchangeably herein.

That is, the set of red subpixels R_SPX, green subpixel G_SPX, blue subpixel B_SPX and white subpixel W_SPX adjacent to one corner can be referred to as one main pixel MPX , Which may correspond to a point represented by the full color of the image of the raw image data. The red subpixel R_SPX may be an area overlapping the red filter area of the color filter CF among the plurality of pixels of the display substrate 100 and the green subpixel G_SPX, the blue subpixel B_SPX, , And the white subpixel W_SPX may be regions that respectively overlap the green filter region, the blue filter region, and the white filter regions of the color filter CF, respectively.

The red subpixel R_SPX, green subpixel G_SPX, blue subpixel B_SPX and white subpixel W_SPX in one main pixel are connected to different data lines DL _j , DL _{j +1} , DL _{j + 2} and DL _{j +3} and the red subpixel R_SPX, the green subpixel G_SPX, the blue subpixel B_SPX and the white subpixel W_SPX in one main pixel are all connected to one scan line SLi . In response to the scan signal Si applied to one scan line SLi, the data signals D _j , D _{j +1} , D _{j +2} , and D _{j +3} are applied to the respective sub pixels, And each pixel electrode (not shown) can be charged with a voltage corresponding to the applied data signals D _j , D _{j +1} , D _{j +2} , D _{j +3} .

5 and 6, a driving method of a display device according to an embodiment of the present invention will be described in more detail.

5 is an exemplary perspective view of a backlight unit according to an embodiment of the present invention.

6 is a driving timing diagram of a scan signal and a backlight unit of a display device according to an embodiment of the present invention.

Referring to FIG. 5, a backlight unit 400 of a display device according to an embodiment of the present invention includes a plurality of blocks BL11 to BL68 arranged in a matrix form. The plurality of blocks BL11 to BL68 of the backlight unit 400 may be lighted or extinguished together in units of one or more rows. For example, the backlight unit 400 may include a plurality of block lines BL_L1 to BL_L6 distinguished in a direction in which scan signals are sequentially applied to the scan lines of the display substrate 100, The lines BL_L1 to BL_L6 may be a collection of blocks of one or more rows of a plurality of blocks BL11 to BL68 arranged in a matrix form.

According to an embodiment of the present invention, each of the block lines BL_L1 to BL_L6 may be sequentially emitted and extinguished in the scan direction.

In the embodiment shown in FIG. 6, the plurality of blocks BL11 to BL68 of the backlight unit 400 form an aggregate of six block lines BL_L1 to BL_L6, but the present invention is not limited thereto . The number of the block lines BL_L1 to BL_L6 formed by the plurality of blocks BL11 to BL68 may be variously changed as long as the optical characteristics required for the display device are satisfied. For example, May be the same number as the number of rows (six in the embodiment of FIG. 6) of the plurality of blocks BL11 to BL68 arranged in two or in the form of a matrix.

Referring to FIG. 6, in a display device according to an exemplary embodiment of the present invention, one frame may include a red sub-frame, a green sub-frame, and a blue sub-frame. The red sub frame, the green sub frame, and the blue sub frame may correspond to sections in which the display device sequentially displays the red image R_IMAGE, the green image G_IMAGE, and the blue image B_IMAGE. In an exemplary embodiment of the present invention, the red image R_IMAGE, the green image G_IMAGE, and the blue image B_IMAGE are sequentially displayed. However, the present invention is not limited thereto. The display device according to the embodiments of the present invention satisfies only the case of implementing a full color image by temporally mixing or dithering the red image R_IMAGE, the green image G_IMAGE, and the blue image B_IMAGE sequentially displayed, The order of the red image R_IMAGE, the green image G_IMAGE, and the blue image B_IMAGE may be changed.

The red sub-frame can be distinguished into an R-data load period and a blank period. The R-data load period corresponds to a period during which a data voltage corresponding to the red image R_IMAGE is applied to a plurality of pixels of the display substrate 100, and the blank period corresponds to the remaining period of the red sub-frame excluding the R- And may be a period during which the backlight unit 400 provides red light R to the display substrate 100. [

 On-scan signals S1 to Sn may be sequentially applied to the plurality of scan lines SL1 to SLn of the display substrate 100 during the R-data load period. A red subpixel R_SPX, a green subpixel G_SPX connected to a scan line to which a turn-on scan signal is applied while the turn-on scan signals S1 to Sn are applied to the scan lines SL1 to SLn, The blue subpixel B_SPX and the white subpixel W_SPX can receive the data signals D1 to Dm from the data lines DL1 to DLm respectively and the voltages corresponding to the applied data signals are supplied to the respective sub- Pixel electrode of the pixel.

A pixel electrode (not shown) forms an electric field in the liquid crystal layer 200, and the arrangement of liquid crystals in the liquid crystal layer 200 can be changed corresponding to the formed electric field. Compared to the charge or discharge time of the pixel electrode, the time at which the liquid crystal are arranged in the liquid crystal layer 200 because of the relatively long delay time, the liquid crystal must be taken into account that there is enough (t _lc), the liquid crystal arrangement time required for the array.

During the R-data load period, since the turn-on scan signals S1 to Sn are sequentially applied to the plurality of scan lines SL1 to SLn, the first scan signal S1 is applied to the first scan line SL1 And the time point at which the last scan signal Sn is applied to the last scan line SLn may have a time difference. Therefore, a time point at which the data voltage is charged to the pixels connected to the first scan line and sufficiently aligns the liquid crystal in accordance with the charged data voltage, and a time point at which the data voltage is charged to the pixels connected to the last scan line The time point at which the liquid crystal is sufficiently aligned may be different.

The easiest approach to orienting liquid crystals corresponding to all the pixels sufficiently to display the red image (R_IMAGE) signal by corresponding enough to the data voltage is that after the last scan signal Sn has been applied to the last scan line SLn, The backlight unit 400 may provide red light R to all the pixels of the display substrate 100 at a time after the time when the liquid crystals corresponding to the pixels connected to the line SLn are arranged.

In this approach, since the backlight unit 400 must provide the red light R to the display substrate 100 after the liquid crystal array time in which the liquid crystals corresponding to the pixels connected to the last scan line are arranged, The liquid crystal array time at which the liquid crystals corresponding to the pixels connected to the line are arranged may be different from the liquid crystal array time at which the liquid crystals corresponding to the pixels connected to the last scan line are arranged and when the red light R is provided to the liquid crystals , Can cause variations in the arrangement of the liquid crystals for the same data voltage. In order to reduce the deviation of the liquid crystal array according to the liquid crystal array time, the liquid crystal array time for arranging the liquid crystal corresponding to the pixels connected to the last scan line is lengthened and the liquid crystal array corresponding to the pixels connected to the first scan line It may be considered that the ratio of the liquid crystal array time at which the liquid crystal corresponding to the pixels connected to the last scan line with respect to the liquid crystal array time is arranged is reduced. In this case, a relatively longer time must elapse after the data voltage is applied to the pixels connected to the last scan line, so that the length of the blank may become longer.

However, in the present invention, since one frame is divided into three subframes, the time period allocated to each subframe may be limited. For example, in the case where the display device according to an embodiment of the present invention drives 60 Hz, the duration of one frame may be 16.7 ms, and the duration of each subframe may be 5.56 ms. In order to improve the display quality, when the high-speed driving is performed at 120 Hz or more, the period allocated to each subframe can be shorter than this.

Therefore, during the red sub-frame period, as the blank period becomes longer, the R_data load period must be shortened, which may be a restriction on filling the pixel electrode of the plurality of pixels with an appropriate data voltage.

On the other hand, each of the block lines of the backlight of the display device according to the exemplary embodiment of the present invention sequentially emits red light (R) in a scan direction in which scan signals are sequentially applied to the scan lines of the display substrate 100 And thus can provide the red light R to the corresponding liquid crystal after the liquid crystal is sufficiently aligned, corresponding to the data voltage charged in each pixel.

Specifically, the first block line of the backlight unit 400 includes red light (red) that is superimposed on the liquid crystals superimposed on the first block line after the liquid crystal array time t _{lc in} which the liquid crystals superimposed on the first block line are sufficiently arranged R, and the other block lines sequentially emit and quench red light R, and the last block line of the backlight unit 400 provides a liquid crystal alignment time t (t) in which liquid crystals superimposed on the last block line are sufficiently arranged _lc ), red light R may be provided to the liquid crystals superimposed on the last block line.

That is, according to an embodiment of the present invention, liquid crystals superimposed on each block line are arranged for a similar liquid crystal array time t _lc , and then red light R is supplied from each block line, It is possible to prevent the deviation of the liquid crystal array due to the difference of the time t _lc .

The time for each of the block lines to maintain the light emission can be increased or decreased according to the brightness required by the display device according to an embodiment of the present invention and the time for maintaining the light emission of neighboring block lines can be partially overlapped, , During the overlap time ( _tov ), neighboring block lines can all maintain luminescence to provide appropriate brightness to the display device.

During the green sub-frame and the blue sub-frame, the plurality of blocks BL11 to BL68 of the backlight unit 400 provide green light G and blue light B, respectively, to the display substrate 100, In addition to displaying the green image G_IMAGE and the blue image B_IMAGE, the driving method of the red sub-frame, the green sub-frame and the blue sub-frame may be the same, and a repeated description thereof will be omitted.

7 and 8, the "main pixel" including the white subpixel W_SPX in the red subpixel R_SPX, the blue subpixel B_SPX and the green subpixel G_SPX is referred to as a & "Or" dot ", will be described in detail.

Fig. 7 is an exemplary diagram illustrating that one "main pixel" represents a "red dot ".

Fig. 8 is an exemplary diagram illustrating that one "main pixel" represents a "cyon point ".

7, during a red sub-frame, the red subpixel R_SPX and the white subpixel W_SPX are coupled to the backlight unit 400 (FIG. 7) during one frame, when one "main pixel" ), And the other sub-pixels can block the red light (R). Then, during the green sub-frame and the blue sub-frame, all the sub-pixels can block both the green light G and the blue light B provided from the backlight unit 400. Thus, during one frame, one main pixel can transmit the red light R through the red subpixel R_SPX and the white subpixel W_SPX, and the light transmitted during each subframe temporally mixes Or dithered, so that the viewer can recognize one main pixel as "red dot ".

Referring to FIG. 8, during one frame, when one "main pixel" represents a "Cyan point", during a red sub-frame, all the sub- R). Subsequently, during the green sub-frame, the green subpixel G_SPX and the white subpixel W_SPX transmit the green light G provided from the backlight unit 400 and the other subpixels transmit the provided green light G Can be blocked. Subsequently, during the blue sub-frame, the blue sub-pixel B_SPX and the white sub-pixel W_SPX transmit the blue light B provided from the backlight unit 400 and the other sub-pixels transmit the provided blue light B Can be blocked. Accordingly, during one frame, the white subpixel W_SPX can transmit the green light G and the blue light B, and accordingly, the green light G and the blue light B are mixed in time or dithered Cyan color can be displayed. The syon light that has been temporally mixed through the blue light B transmitted through the blue sub-pixel B_SPX, the green light G passing through the green sub-pixel G_SPX and the white sub-pixel W_SPX is temporally spatially So that the viewer can recognize one main pixel as "Cyon point ".

Fig. 9 is an example of enlarging a part of a specific image and a display device for displaying a specific image. Fig.

9, a specific image displayed on the display device displays a red area R_A, a green area G_A, a blue area B_A, and a white area W_A, As shown in Fig. 9, an enlarged enlarged area EA is shown together with a part of the center of the specific image.

9, subpixels transmitting red light R are represented by an uppercase letter "R", subpixels transmitting green light G are represented by an uppercase letter "G", blue light Subpixels passing through the subpixel B are represented by an uppercase "B" and subpixels representing a mixed color and white light are represented by an uppercase "W ". In addition, subpixels shielding all light are indicated by black shades.

Referring to the enlarged area EA in Fig. 9, the subpixels of the black line B_L shield all the red light R, the blue light B and the blue light B, and express the black line B_L . In the red region R_A, the red subpixel R_SPX and the white subpixel W_SPX can selectively transmit only the red light R, and the viewer can recognize the main pixels of the red region R_A as red points, The red region R_A can be recognized by the red surface having the red dot distributed therein. The green subpixel G_SPX and the white subpixel W_SPX in the green region G_A can selectively transmit only the green light G and the viewer can view the main pixels of the green region G_A as a green point, The green area G_A can be recognized as a green surface on which the points drawn are distributed. The blue sub-pixel B_SPX and the white sub-pixel W_SPX in the blue region B_A can selectively transmit only the blue light B and the viewer can view the main pixels of the blue region B_A as blue points, The blue region B_A can be recognized as a blue face having a blue dot distribution.

In the white region W_A, the white subpixel W_SPX can transmit all the red light R, the green light G and the blue light B, and transmits the transmitted red light R, green light G ), And the blue light (B) may be mixed or dithered with time to be visually recognized as white light. The red subpixel R_SPX, the green subpixel G_SPX and the blue subpixel B_SPX can selectively transmit the red light R, the green light G and the blue light B, The red light R, the green light G and the blue light B may be mixed and dithered temporally and spatially and visually recognized as white light. The viewer can view the main pixels of the white area W_A as white points and view the white area W_A as the white dot distribution surface.

10 to 14, only the red subpixel R_SPX, the green subpixel G_SPX and the blue subpixel B_SPX among the "main pixels" are recognized to recognize the main pixel as one point or dot The low-temperature field sequential driving method will be described in detail.

10 is a graph showing changes in the liquid crystal characteristic coefficients that determine the response speed of the liquid crystal with temperature.

The response speed of the liquid crystal can be expressed by the following equation of liquid crystal response time.

<Liquid Crystal Response Rate Equation>

Here, d,? ₁ , K, V _th and V are the cell gap of the liquid crystal layer 200, the rotational viscosity of the liquid crystal material, the average elastic modulus of the liquid crystal material, the threshold voltage of the liquid crystal material, (Electric field).

The cell gap of the liquid crystal layer 200, the threshold voltage of the liquid crystal material, and the voltage (electric field) applied to the liquid crystal material are generally values independent of temperature. The rotational viscosity and the average elastic modulus of the liquid crystal material may vary with temperature, In Fig. 10, the variation of the rotational viscosity and the average elastic modulus of the liquid crystal material with temperature is exemplified.

10, the first line LINE1 shows the elastic modulus of the liquid crystal material, the third line LINE3 shows the rotational viscosity of the liquid crystal material and the second line LINE2 shows the average elastic modulus of the liquid crystal material And the ratio of the rotational viscosity to the rotational viscosity.

10, the first line LINE1 indicating the average elastic modulus of the liquid crystal material and the third line LINE3 indicating the rotational viscosity of the liquid crystal material may all increase with decreasing temperature. However, the increase amount of the first line LINE1, that is, the increase amount of the average elastic modulus with respect to the unit temperature decrease may be smaller than the increase amount of the third line LINE3 with respect to the unit temperature decrease, that is, the increase amount of the rotational viscosity. That is, the second line LINE2 indicating the ratio of the rotational viscosity to the elastic modulus of the liquid crystal material may increase as the temperature decreases.

Therefore, from the above-mentioned "liquid crystal response time equation" and Fig. 10, it can be deduced that the response time of the liquid crystal increases as the temperature decreases. For example, the response time of the liquid crystal at a temperature of 0 degrees Celsius may be approximately 3.5 times the response time of the liquid crystal at a temperature of 20 degrees Celsius, and based on the trend of the second line shown in FIG. 10, The response time of the liquid crystal is greatly increased.

As described above, one frame of the display device according to an exemplary embodiment of the present invention includes a red sub frame, a green sub frame, and a blue sub frame, and a plurality of pixels may be driven for each sub frame. Particularly, when the display device according to the embodiment of the present invention performs the mixed field sequential driving as described above, the white pixel controls the degree of transmission for red light R, green light G and blue light B, respectively Therefore, it is possible to require a faster liquid crystal response speed as compared with a general liquid crystal display device.

11 is a graph showing the drive of the white pixel at normal temperature and the drive at the low temperature when the white pixel is intended to transmit only the red light R. FIG.

First, with reference to Fig. 11, the behavioral pattern (LC_t1) of the liquid crystal superimposed on white pixels at room temperature will be described.

When one white pixel corresponds to an image transmitting only the red light R, one white pixel can receive a data voltage transmitting the red light R during the R_Data loading period of the red subframe. The red light R may be provided to the white subpixel W_SPX and the liquid crystal from the backlight unit 400 after the liquid crystal alignment time t _{lc in} which the liquid crystal is sufficiently arranged to correspond to the applied data voltage. The red light R can be displayed by transmitting the white subpixel W_SPX and the liquid crystal by the arranged liquid crystal.

Thereafter, the white subpixel W_SPX may receive a data voltage that blocks the green light G during the G_Data loading period of the green subframe. Green light G is emitted from the backlight unit 400 to the white sub-pixel W_SPX and to the liquid crystal after the liquid crystal is sufficiently aligned to correspond to the applied gradation voltage corresponding to the applied data voltage, for example, Can be provided. At this time, the white subpixel W_SPX and the liquid crystal superimposed thereon can maintain the liquid crystal alignment state for interrupting the green light G, and can be shut off provided to the white subpixel W_SPX and the liquid crystal. Although not shown, the white subpixel W_SPX and the liquid crystal can maintain the blocking state during the blue subframe, and the white subpixel W_SPX can mix the light transmitted in the red subframe, the green subframe and the blue subframe temporally Or the dithered red light R can be transmitted.

Next, with reference to Fig. 11, the behavioral phase (LC_t2) of the liquid crystal superimposed on white pixels at low temperatures will be described.

Since the response speed of the liquid crystal is reduced at a low temperature, the phase of the liquid crystal superimposed on the white subpixel W_SPX in the red sub-frame can be shifted to a more gentle slope as compared with the liquid crystal at room temperature. Particularly, in the green sub-frame, the liquid crystal superimposed on the white sub-pixel W_SPX may have a considerable delay in the liquid crystal alignment time for reaching the liquid crystal alignment state for interrupting the green light G, The white pixels and the liquid crystals can be provided with the green light G from the backlight unit 400 before reaching the blocking liquid crystal alignment state. Accordingly, the white pixel can transmit the green light G in the green sub-frame, and the viewer can see the red light R transmitted through the red subframe and the green light G transmitted through the green subframe, You can visually color mixed or dithered over time during the frame.

Such a color mixture caused by the slow response speed of the liquid crystal at low temperature lowers the color tone of the entire display device and can hinder the display quality of the display device. Particularly, when the display device is used for outdoor advertising, the display device can be exposed to air at a low temperature, and deterioration in display quality due to color mixing can be intensified.

The red subpixel R_SPX, the green subpixel G_SPX and the blue subpixel B_SPX differ from the liquid crystals of the white subpixel W_SPX and the liquid crystal layer 200 superimposed thereon, The green light G or blue light B supplied to the red subpixel R_SPX does not reach the red subpixel R_SPX even if the green subpixel R_SPX is provided with the green light G or the blue light B, ) Can be blocked by the red filter region and the red subpixel R_SPX, the green subpixel G_SPX and the blue subpixel B_SPX can be less influenced by the mixed color such as the white subpixel W_SPX at low temperature have.

Thus, the display device according to the embodiment of the present invention can change the driving mode to the low temperature field sequential driving mode when the display device is driven at a low temperature, and in the low temperature field sequential driving mode, the white sub pixel W_SPX provides And the desired image can be displayed using only the remaining red subpixels R_SPX, green subpixel G_SPX, and blue subpixel B_SPX.

Alternatively, the display device according to an embodiment of the present invention may operate in a low-temperature driving mode at nighttime in which the ambient temperature is relatively low and the ambient light is dark and does not require the display of a large luminance, compared with daytime.

That is, the display device according to an embodiment of the present invention may include a temperature sensor or an optical sensor. When the temperature falls below a specific temperature according to a temperature sensor, the display device operates in a low temperature field sequential driving mode, , It may operate in a mixed field sequential drive mode, or may operate in a low temperature field sequential drive mode in the night time and a mixed field sequential drive mode in the daytime according to the optical sensor.

12 is an exemplary diagram illustrating that, in the low temperature field sequential drive mode, one "main pixel " represents a" red dot ".

13 is an exemplary diagram illustrating that, in the low temperature field sequential drive mode, one "main pixel " represents a" Cyon point ".

14 is an exemplary diagram illustrating that, in the low temperature field sequential drive mode, one "main pixel " represents" white point ".

Referring to FIG. 12, when one "main pixel" represents a "red dot" during one frame, the red sub-pixel R_SPX in the red sub- ), And the other sub-pixels can block the red light R. Then, during the green sub-frame and the blue sub-frame, all the sub-pixels can block both the green light G and the blue light B provided from the backlight unit 400. Accordingly, during one frame, one main pixel can transmit the red light R through the red subpixel R_SPX, and the light transmitted during each subframe is temporally mixed or dithered, Can be recognized as a "red dot ". At this time, the white subpixel W_SPX can maintain the blocking state in all subframes, and it is possible to prevent display quality deterioration due to color mixture depending on the slow liquid crystal response speed.

13, when one "main pixel" expresses a "Cyon point" during one frame, the mode sub-pixel in the red sub frame blocks the red light R provided from the back light unit 400 . Subsequently, the green subpixel G_SPX during the green sub-frame may transmit the green light G provided from the back light unit 400, and the remaining sub-pixels may block the provided green light G. [ Subsequently, during the blue sub-frame, the blue sub-pixel B_SPX can transmit the blue light B provided from the backlight unit 400 and the remaining sub-pixels can block the provided blue light B. [ Accordingly, during one frame, green light G transmitted through the green subpixel G_SPX and blue light B transmitted through the blue subpixel B_SPX are mixed and dithered spatially and temporally in one main pixel, Thus, the viewer can recognize one main pixel as "Cyon point ". At this time, the white subpixel W_SPX can maintain the blocking state in all subframes, and it is possible to prevent display quality deterioration due to color mixture depending on the slow liquid crystal response speed.

14, red subpixels R_SPX, green subpixel G_SPX, and blue subpixel B_SPX are red light (red light), green light The red light R, the green light G and the blue light B that are transmitted through the light guide plate R can selectively transmit green light G and blue light B, So that the viewer can recognize one main pixel as "white point ".

Next, a display device according to another embodiment of the present invention will be described with reference to FIGS. 15 to 24. FIG. The display device according to another embodiment of the present invention will be described below with reference to a difference from an embodiment of the present invention described above. The same reference numerals are used for substantially the same components, Is omitted.

15 is a perspective view illustrating the arrangement relationship of the color filter of the display device, the sub-pixels of the display substrate, and the blocks of the backlight unit according to another embodiment of the present invention.

15, a backlight unit 400 of a display device according to another embodiment of the present invention includes a plurality of blocks BL11 to BL68, and the intensity of light emitted by each of the plurality of blocks BL11 to BL68 The light source may be a direct-type light source that can control the light source. In the present invention, the backlight unit 400 sequentially applies the red light R, the green light G, and the blue light B to the display substrate 100. However, the present invention is not limited thereto, To achieve a desired optical function.

One block BL34 of the backlight unit 400 may be arranged such that a plurality of pixels PX are superimposed and each pixel includes a red filter region, a green filter region, a blue filter region, and a blue filter region of the color filter CF, One of the white filter regions may overlap.

The color filter (CF) is arranged such that the white filter region is disposed adjacent to the left, right, top and bottom of the filter region of one of the red filter region, the green filter region, and the blue filter region, Two filter regions may be disposed adjacent to each other. For example, white filter regions are disposed adjacent to the upper, lower, left, and right sides of the green filter region, red filter regions are disposed adjacent to the left upper and lower left portions, blue filter regions are disposed adjacent to the upper right, . Hereinafter, the arrangement relationship of the filter regions of the color filter CF will be referred to as a "mosaic arrangement structure ".

The color filter CF having such a mosaic arrangement structure is arranged so that the red filter region, the green filter region and the blue filter region are sequentially and repeatedly arranged in one diagonal direction when the color filter (CF) regions are arranged in a matrix, The white filter region may be disposed in a direction of two diagonals adjacent to one diagonal line in which a red filter region, a green filter region, and a blue filter region are sequentially and repeatedly arranged.

The color filter CF having such a mosaic arrangement structure includes a red filter column in which the red filter region and the white filter region are alternately arranged in the column direction when the color filter CF regions are arranged in a matrix form, A green filter column in which a filter area and a green filter area are alternately arranged, and a blue filter column in which a blue filter area and a white filter area are alternately arranged in this order, The other one of the red filter region, the green filter region, and the blue filter region ", the white filter region, the "red filter region, the green filter region, and the blue filter region" White filter region.

Further, in this specification, a plurality of pixels overlapping the red filter region, the green filter region, and the blue filter region are referred to as a red subpixel R_SPX, a green subpixel G_SPX, and a blue subpixel B_SPX, Pixels superposed respectively on the white filter regions are referred to as a first white subpixel W_SPX, a second white subpixel W_SPX and a third white subpixel W_SPX, respectively.

The backlight unit 400 may include a plurality of red LEDs, a green LED, and a blue LED, sequentially lighting and extinguishing a plurality of red LEDs, green LEDs, and blue LEDs, R), green light (G), and blue light (B).

The magnitude of the current or voltage provided to each block of the backlight unit 400 can be adjusted differently for each block, and the magnitude of the voltage or current provided to one block according to the image corresponding to each block is adjusted .

For example, when the display device of the present invention is used as an outdoor billboard, advertisement text or image is displayed at the center of the display device, and a white background image is displayed at the outer portion of the display device, The blocks in the outer portion may be provided with a voltage or current corresponding to the maximum brightness or gradation and the blocks in the central portion of the backlight unit 400 may be provided with a voltage or current corresponding to a relatively small brightness or gradation .

16 is a cross-sectional view illustrating a pixel structure of a display device according to another embodiment of the present invention.

16, a display substrate 100 of a display device according to an exemplary embodiment of the present invention includes a plurality of scan lines and a plurality of data lines, and includes a plurality of scan lines and a plurality of data lines, Pixel may include a subpixel R_SPX, a green subpixel G_SPX, a blue subpixel B_SPX, a first white subpixel W_SPX, a second white subpixel W_SPX and a third white subpixel W_SPX. have. The red subpixel R_SPX, the green subpixel G_SPX and the blue subpixel B_SPX are connected to one of the first white subpixel W_SPX, the second white subpixel W_SPX and the third white subpixel W_SPX Can be spaced apart from each other. In addition, the red subpixel R_SPX, the green subpixel G_SPX, the blue subpixel B_SPX, and the first to third white subpixels W_SPX may be arranged in a mosaic arrangement structure.

That is, when the red subpixel R_SPX, the green subpixel G_SPX, the blue subpixel B_SPX and the first to third white subpixels W_SPX are arranged in a matrix shape, the red subpixel R_SPX (G_SPX) column in which the red subpixel (R_SPX) column in which the first white subpixel W_SPX is repeatedly arranged, the second white subpixel W_SPX and the green subpixel G_SPX are alternately arranged, And a blue subpixel (B_SPX) column in which the blue subpixel B_SPX and the third white subpixel W_SPX are alternately arranged. In this case, the red subpixel R_SPX, The first white subpixel W_SPX, the blue subpixel B_SPX, the first white subpixel W_SPX and the green subpixel G_SPX, the third white subpixel W_SPX, Sub-pixel R_SPX ".

In the present specification, the "main pixel" corresponds to a unit of one "point" in the raw image data in which a plurality of "points" are gathered to constitute one image, and "subpixel" represents one "main pixel" Corresponding to one of a plurality of points on the display substrate 100 for red subpixel R_SPX, green subpixel G_SPX, blue subpixel B_SPX and white subpixel W_SPX do. In addition, "pixel" corresponds to the pixel structure of the smallest unit represented by the display device like "subpixel ", and" red subpixel R_SPX & Pixel G_SPX "," blue subpixel B_SPX "or" white subpixel W_SPX ". However, the terms "pixel" and "subpixel" refer to the same unit of element and are used interchangeably herein.

That is, the set of the red subpixel R_SPX, the green subpixel G_SPX, the blue subpixel B_SPX and the first through third white subpixels W_SPX constituting the mosaic arrangement structure is one main pixel MPX , Which may correspond to a point represented by the full color of the image of the raw image data. The red subpixel R_SPX may be an area overlapping the red filter area of the color filter CF among the plurality of pixels of the display substrate 100 and the green subpixel G_SPX, the blue subpixel B_SPX, , And the first to third white subpixels W_SPX may be regions that respectively overlap the green filter region, the blue filter region, and the white filter regions of the color filter CF, respectively.

The red subpixel R_SPX, the green subpixel G_SPX, the blue subpixel B_SPX and the first to third white subpixels W_SPX in one main pixel are connected to different data lines DL _j and DL _{j + 1,} the red sub-pixel (R_SPX), green sub-pixel (G_SPX), blue sub-pixel (B_SPX) in connected to the _{j +2} DL, DL _{j +3, j +4 DL,} DL _{j +5)} is one of the main pixel And the first through third white subpixels W_SPX may all be connected to one scan line SLi. In response to a scan signal (Si) applied to one of the scan lines (SLi), each of the sub-pixels, the data signal (D _j, D _{j +1, +2} D _j, D _{j +3,} D _{j + 4,} D _{j +5)} corresponding to this and can be applied to each of the applied data signal (D _j, D _{j +1, +2} D _j, D _{j +3, +4} D _j, D _{j +5)} Each pixel electrode can be charged.

Next, with reference to FIGS. 17 and 21, a description will be given of a case where the red subpixel R_SPX, the blue subpixel B_SPX, the green subpixel G_SPX and the first through third white subpixels W_SPX constituting the mosaic arrangement structure A hybrid field sequential driving method which is a driving method of recognizing "main pixel" as one "dot" or "dot &

17 is an exemplary diagram illustrating that one "main pixel" represents "red dot ".

Fig. 18 is an exemplary diagram illustrating that one "main pixel" represents a "green point ".

19 is an exemplary diagram illustrating that one "main pixel" represents a "blue dot ".

20 is an exemplary diagram illustrating that one "main pixel" represents a "white point ".

Fig. 21 is an exemplary diagram illustrating that one "main pixel" represents a "cyan dot ".

17, during one frame, when one "main pixel" represents a "red dot", during the red sub-frame, the red subpixel R_SPX and the first through third white subpixels W ₁ _SPX , W ₂ _SPX, W ₃ _SPX) is and transmits the red light (R) supplied from the backlight unit 400, a green sub-pixel (G_SPX) and a blue sub-pixel (B_SPX) are to block the red light (R) . Then, during the green sub-frame and the blue sub-frame, all the sub-pixels can block both the green light G and the blue light B provided from the backlight unit 400. Accordingly, capable of transmitting during a frame, a main pixel is a red sub-pixel (R_SPX) and the first to third white sub-pixel (W ₁ _SPX, W ₂ _SPX, W ₃ _SPX) the red light (R) And the light transmitted during each sub-frame is temporally mixed or dithered so that the viewer can recognize one main pixel as a "red dot &quot;.

18, when one "main pixel" represents a "green dot" during one frame, all subpixels during the red subframe and the blue subframe are red The light R and the blue light B can be blocked. Meanwhile, during the green sub-frame, the green subpixel G_SPX and the first through third red subpixels may transmit the green light G provided from the backlight unit 400. [ In this way, during one frame, one of the main pixel is capable of transmitting a green sub-pixel (G_SPX) and the first to third white sub-pixel (W ₁ _SPX, W ₂ _SPX, W ₃ _SPX) the green light (G) And the light transmitted during each sub-frame is temporally mixed or dithered so that the viewer can recognize one main pixel as a "green point &quot;.

19, when one "main pixel" represents "blue dot" during one frame, all the subpixels during the red subframe and the green subframe are red The light R and the blue light B can be blocked. Meanwhile, during the blue sub-frame, the blue sub-pixel B_SPX and the first through third red sub-pixels may transmit the blue light B provided from the back light unit 400. [ In this way, during one frame, one of the main pixel is capable of transmitting the blue sub-pixel (B_SPX) and the first to third white sub-pixel (W ₁ _SPX, W ₂ _SPX, W ₃ _SPX) a blue light (B) And the light transmitted during each subframe is temporally mixed or dithered so that the viewer can recognize one main pixel as a "blue dot &quot;.

That is, in a display device according to another embodiment of the present invention, when six subpixels form one main pixel and one of red, green, and blue images is represented, four subpixels out of six subpixels are red, Green and blue light (B). That is, 2/3 subpixels in one main pixel can transmit light, which can increase the transmissivity of the pixel to achieve high energy efficiency of the display device. In particular, three white subpixels W ₁ _SPX, W ₂ _SPX, W ₃ _SPX in one main pixel are superimposed on the white color filter (CF) region, and the white color filter (CF) , The display device according to another embodiment of the present invention can reduce the light loss by the color filter CF since it can correspond to an area substantially free of the color filter CF.

Referring to FIG. 20, during one frame, when one "main pixel" represents a "white dot", during the red sub-frame, the red sub-pixel R_SPX and the first through third sub- The green subpixel G_SPX and the first through third subpixels transmit green light G provided from the backlight unit 400 while transmitting red light R provided from the backlight unit 400, And the blue subpixel B_SPX and the first through third subpixels can transmit the blue light B provided from the backlight unit 400 during the blue sub-frame. Thus, during one frame, the first through third white subpixels W ₁ _SPX, W ₂ _SPX, and W ₃ _SPX transmit red light R, green light G and blue light B And each of the lights can express white light that is temporally mixed or dithered. The red subpixel R_SPX, green subpixel G_SPX and blue subpixel B_SPX can transmit red light R, green light G and blue light B, respectively, Can be mixed and dithered spatially and temporally to express white light. At this time, the viewer can recognize one main pixel as "white point &quot;.

Referring to FIG. 21, during one frame, when one "main pixel" represents a "cyan dot &quot;, during a red sub-frame, all sub-pixels can block red light R. The green subpixel G_SPX and the first through third subpixels during the green sub-frame then transmit the green light G provided from the back light unit 400, and during the blue sub-frame, the blue sub-pixels B_SPX and The first through third sub-pixels may transmit the blue light B provided from the backlight unit 400. Thus, during one frame, the first to third white subpixels W ₁ _SPX, W ₂ _SPX, and W ₃ _SPX can transmit the green light G and the blue light B, Can represent temporally mixed or dithered cyan. The green subpixel G_SPX and the blue subpixel B_SPX can transmit the green light G and the blue light B respectively and the respective lights are mixed and dithered spatially and temporally to express cyan . At this time, the viewer can recognize one main pixel as "cyan point &quot;.

FIG. 22 is an exemplary diagram showing a specific image displayed on a display device according to another embodiment of the present invention, and an enlarged view of a part of a specific image. FIG.

22, a specific image displayed on the display device according to another embodiment of the present invention includes a red region R_A, a green region G_A, a blue region B_A, and a white region W_A, Are bounded by the black line B_L. Further, in Fig. 21, an enlarged enlarged area (EA) is shown together with a part of the center of the specific image.

22, subpixels transmitting red light R are represented by an uppercase letter "R", subpixels transmitting green light G are represented by an uppercase letter "G", blue light Subpixels passing through the subpixel B are represented by an uppercase "B" and subpixels representing a mixed color and white light are represented by an uppercase "W ". In addition, subpixels shielding all light are indicated by black shades.

Referring to the enlarged area EA in Fig. 22, the subpixels of the black line B_L shield all of the red light R, the blue light B and the blue light B, and express the black line B_L . In the red region (R_A), red sub-pixel (R_SPX) and the first to third white sub-pixel _{(W 1 _SPX, W 2 _SPX} , W 3 _SPX) can be selectively transmits only red light (R), a viewer The main pixels of the red region R_A can be recognized as a red point, and the red region R_A can be recognized as a red surface on which red points are distributed. Painted in a green region (G_A) subpixels (G_SPX) and the first to third white sub-pixel _{(W 1 _SPX, W 2 _SPX} , W 3 _SPX) it can be selectively transmits only the green light (G), a viewer The main pixels of the green region G_A can be recognized as a green point, and the green region G_A can be recognized as a green surface on which a point drawn is distributed. Blue in the blue region (B_A) subpixels (B_SPX) and the first to third white sub-pixel _{(W 1 _SPX, W 2 _SPX} , W 3 _SPX) can be selectively transmits only blue light (B), the viewer The main pixels of the blue region B_A can be recognized as a blue point, and the blue region B_A can be recognized as a blue face having a blue point distributed.

In the white area (W_A), the first to third white sub-pixel _{(W 1 _SPX, W 2 _SPX} , W 3 _SPX) it is capable of transmitting all of the red light (R), green light (G) and blue light (B) And the transmitted red light R, green light G, and blue light B may be mixed or dithered in time to be visible as white light. The red subpixel R_SPX, the green subpixel G_SPX and the blue subpixel B_SPX can selectively transmit the red light R, the green light G and the blue light B, The red light R, the green light G and the blue light B may be mixed and dithered temporally and spatially and visually recognized as white light. The viewer can view the main pixels of the white area W_A as white points and view the white area W_A as the white dot distribution surface.

23 is an exemplary diagram illustrating that, in the low temperature field sequential drive mode, one "main pixel " represents a" red dot ".

Fig. 24 is an exemplary diagram illustrating that, in the low temperature field sequential driving mode, one "main pixel " represents a" cyon point ".

25 is an exemplary diagram illustrating that in a low temperature field sequential drive mode, one "main pixel " represents a" white point ".

Referring to FIG. 23, when one "main pixel" represents a "red dot" during one frame, the red subpixel R_SPX in the red subframe includes red light R ), And the other sub-pixels can block the red light R. Then, during the green sub-frame and the blue sub-frame, all the sub-pixels can block both the green light G and the blue light B provided from the backlight unit 400. Accordingly, during one frame, one main pixel can transmit the red light R through the red subpixel R_SPX, and the light transmitted during each subframe is temporally mixed or dithered, Can be recognized as a "red dot &quot;. At this time, the first to third white subpixels W ₁ _SPX, W ₂ _SPX, and W ₃ _SPX can maintain the blocking state in all the subframes, and prevent display quality deterioration due to color mixture depending on the slow liquid crystal response speed can do.

24, when one "main pixel" represents a "Cyon point" during one frame, the mode sub-pixel in the red sub-frame blocks the red light R provided from the back light unit 400 . Subsequently, the green subpixel G_SPX during the green sub-frame may transmit the green light G provided from the back light unit 400, and the remaining sub-pixels may block the provided green light G. [ Subsequently, during the blue sub-frame, the blue sub-pixel B_SPX can transmit the blue light B provided from the backlight unit 400 and the remaining sub-pixels can block the provided blue light B. [ Accordingly, during one frame, green light G transmitted through the green subpixel G_SPX and blue light B transmitted through the blue subpixel B_SPX are mixed and dithered spatially and temporally in one main pixel, Thus, the viewer can recognize one main pixel as "Cyon point &quot;. At this time, the first to third white subpixels W ₁ _SPX, W ₂ _SPX, and W ₃ _SPX can maintain the blocking state in all the subframes, and prevent display quality deterioration due to color mixture depending on the slow liquid crystal response speed can do.

25, red subpixel R_SPX, green subpixel G_SPX, and blue subpixel B_SPX, when one "main pixel" represents a "white point" during one frame, The red light R, the green light G and the blue light B that are transmitted through the light guide plate R can selectively transmit green light G and blue light B, So that the viewer can recognize one main pixel as "white point &quot;. At this time, the first to third white subpixels W ₁ _SPX, W ₂ _SPX, and W ₃ _SPX can keep the blocking state in the mode sub-frame and prevent the color mixture depending on the slow response speed of the liquid crystal.

In the display device according to another embodiment of the present invention, the first white subpixel W ₁ _SPX, the second white subpixel W ₂ _SPX and the third white subpixel W ₃ _SPX have substantially the same data voltage It is possible to transmit light of the same color and brightness.

Further, in the display device according to another embodiment of the present invention, the first white sub pixel W ₁ _SPX, the second white sub pixel W ₂ _SPX and the third white sub pixel W ₃ _SPX are Different data voltages may be applied to transmit light of different colors and brightness.

That is, in another embodiment of the present invention, each white subpixel W ₁ _SPX, W ₂ _SPX, W ₃ _SPX receives a data voltage corresponding to different gradation data values, It is possible to express the light and color of the luminance.

However, at this time, data processing for all six subpixels constituting one main pixel is required, which can increase the processing load of the driving IC of the display device.

In this embodiment, the same gradation data value is applied to the first through third white subpixels W ₁ _SPX, W ₂ _SPX and W ₃ _SPX, and each white subpixel W ₁ _SPX, W ₂ _SPX, W ₃ _SPX) may be different from each other by applying different gamma curves to one gradation data value.

26 is a graph showing the gamma curves applied to each white subpixel and the gamma curve for the luminance of all the subpixels in the display device according to another embodiment of the present invention.

FIG. 27 is an illustration showing an angle at which the liquid crystal corresponding to the first to third white subpixels is tilted with respect to a specific gradation level. FIG.

Referring to FIG. 26, gamma curves applied to the first through third white subpixels W ₁ _SPX, W ₂ _SPX, W ₃ _SPX may be different. 26 is a graph showing normalization of the luminance corresponding to the other gradation when the luminance when the display apparatus expresses the gradation of the maximum brightness is 1;

For example, when the maximum gradation, that is, the gradation data value is 255, a data voltage corresponding to 255 gradations is applied to each of the white subpixels W ₁ _SPX, W ₂ _SPX, W ₃ _SPX, each of the white sub-pixel voltage is applied to the _{(W 1 _SPX, W 2 _SPX} , W 3 _SPX) may be the same, each of the white sub-pixel _{(W 1 _SPX, W 2 _SPX} , W 3 _SPX) the transmitted light that The luminance may correspond to 0.25 respectively. White sub-pixel _{(W 1 _SPX, W 2 _SPX} , W 3 _SPX) other sub-pixels which are not, that is, transmitted through the red sub-pixel (R_SPX), green sub-pixel at least one of (G_SPX) and a blue sub-pixel (B_SPX) The luminance of light may correspond to 0.25, and the luminance of light passing through one main pixel at the maximum gradation may be normalized to one.

However, each of the white sub-pixel between the (W ₁ _SPX, W ₂ _SPX, W ₃ _SPX) gamma curve may be different from each other are applied to the minimum gray-scale (0-th gray-scale), the maximum gradation (255) level from a particular gray scale level The data voltages applied to the respective white subpixels W ₁ _SPX, W ₂ _SPX and W ₃ _SPX may be different from each other.

For example, in the G1 gray level of 26, each of the white sub-pixel (W ₁ _SPX, W ₂ _SPX, W ₃ _SPX) may be applied with a data voltage corresponding to G1 gradation, each of the white sub-pixel (W ₁ _SPX, W ₂ _SPX, W ₃ _SPX) may be different.

For example, in the G1 gradation, the data voltage applied to the first white subpixel W ₁ _SPX is the largest, and the data voltages applied to the second white subpixel W ₂ _SPX and the third white subpixel W ₃ _SPX are The applied data voltage can be reduced.

Accordingly, in the G1 gradation, the luminance of the light passing through the first white subpixel W ₁ _SPX can be the largest, and the second white subpixel W ₂ _SPX and the third white subpixel W ₃ _SPX The brightness of the light transmitted through the light guide plate can be reduced.

Referring to Figure 27, a specific gray level, that is, in the G1 gradation, each of the white sub-pixel angle at which the liquid crystal are tilted corresponding to _{(W 1 _SPX, W 2 _SPX} , W 3 _SPX) may be different, which each white The brightness of light transmitted through the sub-pixels W ₁ _SPX, W ₂ _SPX, W ₃ _SPX can be made different.

In some embodiments of the present invention, the liquid crystal corresponding to each subpixel may be arranged in a plurality of directions, e.g., four directions. This can be achieved by forming a pattern that pre-tilts the liquid crystal in each of the four subpixels in four directions. That is, although not shown, each of the subpixels may include a plurality of domains divided on the basis of a direction in which the liquid crystal lies down, which can alleviate color distortion depending on the viewing angle of the display device.

Further, different gamma curves can be applied to the first to third white subpixels W_SPX, which can reduce the color distortion phenomenon according to the viewing angle of the display device in the low gradation region. For example, by applying different gamma curves to the first through third white subpixels W_SPX, the first white subpixel W ₁ _SPX transmits a part of the light in the low gradation region, (W ₂ _SPX) and the third white subpixel (W ₃ _SPX) can block most of the light. This makes it possible to increase the expression accuracy in which the white subpixels W ₁ _SPX, W ₂ _SPX, and W ₃ _SPX express variations in small gradation levels in the low gradation region in the low gradation region, It is possible to reduce the gamma distortion occurring in the wide viewing angle of the display device.

Embodiments of the present invention have been described with reference to the accompanying drawings. Although the field sequential driving that provides the red light (R), the green light (G), and the blue light (B) sequentially in the light source sequence has been mainly described in the illustrated embodiments, the present invention is not limited thereto.

In another embodiment of the present invention, the display substrate 100 receives white light from the backlight unit 400, or the color light corresponding to each pixel, for example, red subpixel R_SPX is red light (R), green sub-pixel (G_SPX) is green light (G), blue sub-pixel (B_SPX) is blue light (B), white sub-pixel _{(W 1 _SPX, W 2 _SPX} , W 3 _SPX) are white light Respectively.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

100: display substrate 200: liquid crystal layer
300: opposing substrate 400: back light unit
CF: color filter POL1: first polarizer plate
POL2: second polarizer plate

Claims (22)

A display substrate including a plurality of pixels defined by a plurality of scan lines and a plurality of data lines;
A light source for sequentially supplying the first color light, the second color light, and the third color light to the display substrate;
A first filter region for transmitting the first color light, a second filter region for transmitting the second color light, a third filter region for transmitting the third color light, and a second filter region for transmitting the first color light, And a fourth filter region through which the third color light is transmitted,
Wherein the plurality of pixels includes at least a first pixel superimposed on a first filter region of the color filter, a second pixel superimposed on a second filter region of the color filter, a third pixel superimposed on a third filter region of the color filter, And a fourth pixel overlapping the fourth filter region of the color filter. The display device according to claim 1, wherein the first color light is red light, the second color light is green light, and the third color light is blue light. The optical filter according to claim 2, wherein the first filter region is a red filter region for selectively passing red light, the second filter region is a green filter region for selectively passing green light, And the fourth filter is a white filter region through which red light, green light, and blue light are all passed. The surface light source according to claim 1, wherein the light source is a surface light source disposed on the opposite side of the display surface of the display substrate, and the surface light source includes one or more red light sources disposed on at least one side of the surface light source, An edge-type surface light source including a light source. The display device according to claim 1, wherein the light source directs an object or space opposite the display surface of the display substrate, and a reflection tube of light directing the object or the space is provided toward the display substrate. The display device according to claim 1, wherein the light source is a surface light source disposed on the opposite side of the display surface of the display substrate, the light source includes a plurality of blocks arranged in a matrix, The display being adjustable. The light source according to claim 6, wherein the light source includes a plurality of first color LEDs, a plurality of second color LEDs, and a plurality of third color LEDs, wherein the plurality of first color LEDs, And sequentially supplying the first color light, the second color light and the third color light to the display substrate by sequentially turning on and off the three-color LEDs. The display device according to claim 6, wherein a magnitude of a current or voltage provided to each block of the light source is differently adjusted for each block according to a video image corresponding to each block. The method according to claim 6, wherein the light source includes first through n-th block lines (n is a natural number of 2 or more), each convex line includes one or more rows of the plurality of blocks, And the block line sequentially emits and extinguishes from the first block line to the nth block line. The display device of claim 9, wherein a time of one of the first to nth block lines and a time of a next block line are overlapped for an overlap time. The method of claim 1, wherein, in the mixed field sequential driving mode, during the first sub-frame in which the first color light is provided, the first pixel and the fourth pixel adjust the degree of transmission of the first color light, The third pixel blocks the first color light, the second pixel and the fourth pixel adjust the degree of transmission of the second color light during the second sub-frame in which the second color light is provided, The third pixel blocks the second color light, the third pixel and the fourth pixel adjust the degree of transmission of the third color light during the third sub-frame in which the third color light is provided, And the second pixel blocks the third color light. The method of claim 1, wherein, in a low temperature field sequential drive mode, during a first sub-frame in which first color light is provided, the first pixel controls the degree to which the first color light is transmitted and the second pixel, The fourth pixel blocks the first color light, the second pixel controls the degree to which the second color light is transmitted during the second sub-frame in which the second color light is provided, and the first pixel, The fourth pixel blocks the second color light, and during the third sub-frame in which the third color light is provided, the third pixel controls the degree of transmission of the third color light, and the first pixel, And the fourth pixel blocks the third color light. The apparatus of claim 1, further comprising a temperature sensor,
The temperature sensor senses an external temperature, and when the temperature falls below a certain temperature according to the sensed temperature, the display device operates in a low temperature field sequential drive mode and when the temperature is above a certain temperature, the display device displays a mixed field sequential drive mode Lt; / RTI &gt;
In the mixed field sequential driving mode, during the first sub-frame in which the first color light is provided, the first pixel and the fourth pixel control the degree of transmission of the first color light, and the second pixel and the third pixel control the degree And the second pixel and the fourth pixel adjust the degree of transmission of the second color light during the second sub-frame in which the second color light is provided, and the first pixel and the third pixel intercept the first color light, The third pixel and the fourth pixel control the degree to which the third color light is transmitted, and the first pixel and the second pixel intercept the second color light during the third sub-frame in which the third color light is provided, 3-color light is cut off,
In the low temperature field sequential driving mode, the first pixel controls the degree of transmission of the first color light during the first sub-frame in which the first color light is provided, and the second pixel, the third pixel, And the second pixel controls the degree to which the second color light is transmitted, and the first pixel, the third pixel and the fourth pixel intercept the second color light during the second sub-frame in which the second color light is provided, And the third pixel controls the degree to which the third color light is transmitted, and the first pixel, the second pixel and the fourth pixel intercept the third color light during the third sub-frame in which the third color light is provided, A display device for blocking color light. The apparatus of claim 1, further comprising an optical sensor,
The optical sensor senses an external light intensity, and the display device operates in the low temperature field sequential drive mode at night according to the sensed light intensity, and the display device operates in the mixed field sequential drive mode during the daytime,
In the mixed field sequential driving mode, during the first sub-frame in which the first color light is provided, the first pixel and the fourth pixel control the degree of transmission of the first color light, and the second pixel and the third pixel control the degree And the second pixel and the fourth pixel adjust the degree of transmission of the second color light during the second sub-frame in which the second color light is provided, and the first pixel and the third pixel intercept the first color light, The third pixel and the fourth pixel control the degree to which the third color light is transmitted, and the first pixel and the second pixel intercept the second color light during the third sub-frame in which the third color light is provided, 3-color light is cut off,
In the low temperature field sequential driving mode, the first pixel controls the degree of transmission of the first color light during the first sub-frame in which the first color light is provided, and the second pixel, the third pixel, And the second pixel controls the degree to which the second color light is transmitted, and the first pixel, the third pixel and the fourth pixel intercept the second color light during the second sub-frame in which the second color light is provided, And the third pixel controls the degree to which the third color light is transmitted, and the first pixel, the second pixel and the fourth pixel intercept the third color light during the third sub-frame in which the third color light is provided, A display device for blocking color light. The display device of claim 1, wherein the plurality of pixels further include a fifth pixel and a sixth pixel overlapping the fourth filter region. 16. The display device of claim 15, wherein the fourth, fifth, and sixth pixels are applied with data voltages having different gamma voltage curves. 17. The display device according to claim 16, wherein the data voltages applied to the fourth pixel, the fifth pixel and the sixth pixel are different for one gray level between the minimum gray level and the maximum gray level. 16. The method of claim 15, wherein the first pixel, the second pixel, the third pixel, the fourth pixel, the fifth pixel, and the sixth pixel are arranged in a matrix and the first pixel and the fourth pixel are repeatedly arranged A second column in which the second pixel is repeatedly arranged alternately in the column direction, and a third column in which the third pixel and the sixth pixel are alternately arranged in the third direction, Wherein the first pixel, the fifth pixel, the third pixel, the fourth pixel, the second pixel, and the sixth pixel are repeatedly arranged. 19. The display device of claim 18, wherein the fourth pixel, the fifth pixel, and the sixth pixel are applied with data voltages having different gamma voltage curves. 20. The display device according to claim 19, wherein the data voltages applied to the fourth pixel, the fifth pixel and the sixth pixel are different for one gray level between the minimum gray level and the maximum gray level. A display substrate including a plurality of pixels defined by a plurality of scan lines and a plurality of data lines;
And a light source for providing light to the display substrate,
A first filter region for transmitting the first color light, a second filter region for transmitting the second color light, a third filter region for transmitting the third color light, and a second filter region for transmitting the first color light, And a fourth filter region through which light is transmitted, wherein the plurality of pixels includes a first pixel overlapping at least a first filter region of the color filter, a second pixel overlapping a second filter region of the color filter, A third pixel overlapping a third filter region of the color filter, and a fourth pixel, a fifth pixel and a sixth pixel overlapping the fourth filter region of the color filter,
Wherein the data voltages to which the gamma voltage curves are applied are applied to the fourth pixel, the fifth pixel and the sixth pixel. A display substrate including a plurality of pixels defined by a plurality of scan lines and a plurality of data lines;
And a light source for providing light to the display substrate,
A first filter region for transmitting the first color light, a second filter region for transmitting the second color light, a third filter region for transmitting the third color light, and a second filter region for transmitting the first color light, And a fourth filter region through which light is transmitted, wherein the plurality of pixels includes a first pixel overlapping at least a first filter region of the color filter, a second pixel overlapping a second filter region of the color filter, A third pixel overlapping a third filter region of the color filter, and a fourth pixel, a fifth pixel and a sixth pixel overlapping the fourth filter region of the color filter,
The first pixel, the second pixel, the third pixel, the fourth pixel, the fifth pixel and the sixth pixel are arranged in a matrix shape, and the first column and the fourth pixel are alternately arranged in the column direction, And a third column in which a third pixel and a sixth pixel are alternately arranged in a third direction and a third column in which a fifth pixel and a second pixel are alternately arranged in a repetition direction, Pixel, a third pixel, a fourth pixel, a second pixel, and a sixth pixel are repeatedly arranged.

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