KR20080059945A - Triple view liquid crystal display device and method of manufacturing the same - Google Patents

Abstract

A triple view LCD and a manufacturing method thereof are provided to display different images according to left, right and front viewing angles through one display device by using a mask filter formed within an upper plate and enable a viewer to view only a desired image at each of left, right and front viewing angle areas without interference of the other image. An LCD(Liquid Crystal Display) panel includes first pixels for displaying a first image, second pixels for displaying a second image, and third pixels for displaying a third image. A mask filter(22) includes a transmissive unit(23) and a blocking pattern(21) formed within an upper plate(30) of the LCD panel, and makes the first to third images transmitted to different viewing angle areas. A light blocking wall(24) is formed within the upper plate so as to be corresponded to the blocking pattern of the mask filter.

Description

TRIPLE VIEW LIQUID CRYSTAL DISPLAY DEVICE AND METHOD OF MANUFACTURING THE SAME}

1 is a cross-sectional structure of a triple view liquid crystal display device according to a first embodiment of the present invention.

2 is a cross-sectional structure of a triple view liquid crystal display according to a second embodiment of the present invention.

3 is a cross-sectional structure of a triple view liquid crystal display according to a first embodiment of the present invention

4 is a cross-sectional structure of a triple view liquid crystal display according to a first embodiment of the present invention.

5A through 5D are cross-sectional views illustrating a method of manufacturing a top plate in the triple view LCD according to the first and second embodiments of the present invention.

6A through 6E are cross-sectional views illustrating a method of manufacturing a top plate in a triple view LCD according to third and fourth embodiments of the present invention.

<Description of the code | symbol about the principal part of drawing>

10: lower plate 18: liquid crystal layer

22: mask filter 24: light blocking wall

30: tops

The present invention relates to a liquid crystal display device and a manufacturing method thereof, and more particularly to a triple view liquid crystal display device and a manufacturing method thereof.

Popular flat panel display devices include liquid crystal display (LCD) using liquid crystal, plasma display panel (PDP) using discharge of inert gas, and organic electroluminescent display (OLED) using organic light emitting diode. to be. Among them, the plasma display panel is applied only to a large TV, whereas the liquid crystal display and the organic electroluminescent display are applied to many fields in various sizes from small to large, such as mobile phones, portable computers, monitors, and TVs.

Herein, the liquid crystal display uses the electrical and optical characteristics of the liquid crystal. This is because liquid crystals have anisotropic properties that are different in physical property values such as refractive index and dielectric constant, and have an advantage of easily controlling molecular arrangement and optical properties. In other words, the liquid crystal display displays an image by adjusting the light transmittance by changing the arrangement direction of the liquid crystal molecules according to the electric field.

In detail, the LCD displays an image through a liquid crystal panel in which a plurality of pixels are arranged in a matrix. Each pixel of the liquid crystal panel implements a desired color by using a combination of red, green, and blue sub-pixels that adjust light transmittance by varying a liquid crystal array according to a data signal. Each subpixel charges the data signal supplied to the pixel electrode through the thin film transistor and the difference voltage of the common voltage supplied to the common electrode to drive the liquid crystal. The liquid crystal display device includes a backlight unit for supplying light from the rear side of the liquid crystal panel because the liquid crystal panel is a non-light emitting device.

On the other hand, in order to meet the needs of various users recently, the development of a triple view liquid crystal display device that can show different images according to the left, right, front view angle without interference through a single liquid crystal display device is required. have.

Accordingly, an object of the present invention is to provide a triple view display device and a method of manufacturing the same, which can show different images in left, right, and front viewing angle regions through one screen of a liquid crystal panel without interference.

A triple view display device according to the present invention for achieving the above object is a liquid crystal having first pixels for displaying a first image, second pixels for displaying a second image and third pixels for displaying a third image. A mask filter including a display panel, a blocking pattern and a transmission part formed in the upper plate of the liquid crystal display panel to allow the first, second, and third images to pass through different viewing angle regions; and a mask pattern corresponding to the blocking pattern of the mask filter. It includes a light blocking wall formed in the top plate.

Each of the first pixel, the second pixel, or the third pixel includes three subpixels adjacent to each other, or the first pixel, the second pixel, and the third pixel include nine subpixels adjacent to each other.

The first pixel is disposed in three selected subpixels of the nine subpixels, and the second pixel is disposed in three subpixels selected from six subpixels except for the three subpixels selected as the first pixel. The third pixel is disposed with the remaining subpixels except for the six subpixels selected from the first and second pixels.

The liquid crystal display panel includes a top plate and a bottom plate bonded to the top plate with the liquid crystal layer interposed therebetween.

The upper plate includes an insulating substrate on which the light blocking wall and the mask filter are formed, and a first overcoat layer on the insulating substrate on which the light blocking wall and the mask filter are formed.

A second overcoat layer is further formed between the light blocking wall and the mask filter.

It further includes a color filter array having a black matrix and a color filter.

The first overcoat layer is formed at the same height as the light blocking wall.

The subpixel is configured of a subpixel line, and the blocking pattern and the light blocking wall have a line shape formed in the same direction as the subpixel line.

The blocking pattern is alternately formed with the transmission part, and the light blocking wall blocks light leakage from which the first, second, and third images respectively travel to the relative viewing angle region.

Each of the first image, the second image, and the third image is a left viewing angle region, a right viewing angle region, and a front viewing angle region, respectively.

According to an aspect of the present invention, there is provided a method of manufacturing a triple view display device, including forming a mask filter having a blocking pattern and a transmission part on an insulating substrate, and forming a light blocking wall corresponding to the blocking pattern. And forming a first overcoat layer on the insulating substrate on which the light blocking wall and the mask filter are formed.

The light blocking wall is formed to overlap with a central portion of the blocking pattern, and the light blocking wall is formed at a boundary of the blocking pattern.

Forming a color filter on the first overcoat layer, further comprising forming a black matrix between the first overcoat layer and the color filter, and a second between the mask filter and the light blocking wall. And forming an overcoat layer.

Other features and advantages of the present invention in addition to the features of the present invention will become apparent from the description of the preferred embodiment of the present invention with reference to the accompanying drawings.

1 shows a cross-sectional structure of a triple view liquid crystal display according to a first embodiment of the present invention.

As shown in FIG. 1, the triple view liquid crystal display device includes a lower plate 10, an upper plate 30 on which a mask filter 22 and a light blocking wall 24 are formed, and an upper plate 30 and a lower plate 10. The liquid crystal panel including the formed liquid crystal layer 18 is provided.

The lower plate 10 includes a thin film transistor array formed on a lower insulating substrate. The thin film transistor array includes gate lines and data lines crossing each other insulated from each other and separating each subpixel region, thin film transistors connected to the gate line and the data line to individually drive the subpixels, and each subpixel region. The pixel electrodes may include pixel electrodes formed separately from each other and connected to the thin film transistors. In addition, a common electrode for driving the liquid crystal layer 18 may be formed in the thin film transistor array by forming an electric field with the pixel electrode.

The upper plate 30 includes a mask filter 22, a light blocking wall 24, and a color filter array 28 stacked on an inner surface of the upper insulating substrate 20.

The color filter array 28 includes a black matrix for dividing each subpixel region and a red (hereinafter R), green (hereinafter B), and blue (hereinafter B) color filter respectively formed in the subpixel region. In addition, when the common electrode is not formed on the lower plate 10, the common electrode may be formed on the color filter array 28.

The mask filter 22 has a structure in which the blocking pattern 21 for blocking light is repeatedly arranged with the transmission part 23 interposed therebetween. That is, the blocking pattern 21 and the transmission part 23 have a structure in which they are alternately arranged alternately.

The blocking pattern 21 is formed of a metal such as chromium (Cr) or a black resin to partially block light. The blocking pattern 21 is formed in a vertical (column) line shape to selectively block light according to the left viewing angle region and the right viewing angle region with respect to the front viewing angle region. That is, the blocking pattern 21 blocks light from two pixels among three adjacent pixel regions P1, P2, and P3 according to the front viewing angle region, the left viewing angle region, and the right viewing angle region. It transmits light from the other pixel. Each of the pixel areas P1, P2, and P3 includes R, G, and B subpixels.

In more detail, when viewing the liquid crystal panel in the right viewing angle region, the blocking pattern 21 blocks light from the first pixel region P1 and the second pixel region P2, and the transmissive portion 23 has a third shape. The light from the pixel region P3 is transmitted.

In addition, when viewing the liquid crystal panel in the left viewing angle region, the blocking pattern 21 blocks light from the third pixel region P3 and the second pixel region P2, and the transmission unit 23 transmits the first pixel region P1. Transmits light from

In addition, when viewing the liquid crystal panel in the front viewing angle region, the blocking pattern 21 blocks light from the first pixel region P1 and the third pixel region P3 and the transmission unit 23 transmits the second pixel region P2. Transmits light from

Accordingly, the image of? Displayed in the combination of the third pixel region P3 in the right viewing angle region, the image of? Displayed in the combination of the first pixel region P1 in the left viewing angle region, and the second image in the front viewing angle region. The image of ② displayed by the combination of the pixel areas P2 can be seen. To this end, the video signal of ① is supplied to the first pixel region, the video signal of ② to the second pixel region, and the ③ video signal to the third pixel region.

The light blocking wall 24 blocks different images ①, ②, and ③ seen in each of the left, right, and front viewing angle regions from interfering with the images of the relative viewing angle regions.

The light blocking wall 24 is formed to overlap the center of each of the blocking patterns 22, for example, to overlap the boundary portions of three adjacent pixel areas P1, P2, and P3. In other words, the light blocking wall 24 is formed to be long in the form of a vertical (column) line together with the blocking pattern 22.

For example, the light blocking wall 24 is located on the left side from the second and third pixel areas P2 and P3 when the viewer views an image of ① displayed in the combination of the first pixel area P1 in the left viewing angle area. It blocks light leakage that progresses to the viewing angle area, that is, ②, ③ images. Accordingly, the viewer located in the left viewing angle region can see only the image of ① without interference of the images ② and ③.

The light blocking wall 24 has a right viewing angle region from the first and second pixel regions P1 and P2 when the viewer views an image of ③ displayed as a combination of the third pixel regions P3 in the right viewing angle region. Light leakage proceeds to, that is, ①, ② block the image. Accordingly, the viewer located in the right viewing angle region can see only the image of ③ without the interference of the ① and ② images.

The light blocking wall 24 is a front viewing angle region from the first and third pixel regions P1 and P3 when the viewer views an image of ② displayed in a combination of the second pixel regions P2 in the front viewing angle region. Block the light leakage that proceeds to, ①, ③ video. Accordingly, the viewer located in the front viewing angle region can see only the image of ② without interference of the ① and ③ images.

An overcoat layer 26 is further formed between the upper insulating substrate 20 on which the mask filter 22 and the light blocking wall 24 are formed and the color filter array 28 to planarize the color filter array 28. .

As described above, the triple view liquid crystal display according to the present invention uses a mask filter 22 formed on the inner surface of the upper plate 30 to display one image with different images (①, ②, ③) according to the left and right front viewing angles. In the left, right, and front viewing angle regions, the viewer can see only the desired image without interference of other images by the light blocking wall 24.

The triple view liquid crystal display device having the color filter array defined by the first, second, and third pixel areas has been described above, and the color filter array defined by the first, second, and third subpixel areas is described below. The cross-sectional structure of the triple view liquid crystal display device is shown.

2 shows a cross-sectional structure of a triple view liquid crystal display according to a second embodiment of the present invention.

As shown in FIG. 2, the triple view liquid crystal display includes a lower plate 101, a mask filter 221, and a light blocking wall 241 formed between an upper plate 301, an upper plate 301, and a lower plate 101. The liquid crystal panel including the formed liquid crystal layer 181 is provided.

The lower plate 101 has the same structure as the lower plate 10 shown in the first embodiment.

The upper plate 301 includes a mask filter 221 stacked on an inner surface of the upper insulating substrate 201, a light blocking wall 241, and a color filter array 281.

The color filter array 281 includes a black matrix for dividing each subpixel region and a red (hereinafter R), green (hereinafter B), and blue (hereinafter B) color filter respectively formed in the subpixel region. In addition, when the common electrode is not formed on the lower plate 101, the common electrode may be formed on the color filter array 281.

The color filter array 281 is defined as a first sub image area SP1, a second sub image area SP2, and a third sub image area SP3, and three sub pixels are disposed in each sub image area. .

For example, R1, G3, and G2 subpixels are disposed in the first sub-image region SP1, B1, B3, and R2 subpixels are disposed in the second sub-image region SP2, and the third sub-image region ( SP3) are arranged as subpixels G1, R3, and B2.

The mask filter 221 has a structure in which a blocking pattern 211 for blocking light is repeatedly arranged with the transmission part 231 interposed therebetween. That is, the blocking pattern 211 and the transmission part 231 have a structure in which they are alternately arranged alternately.

The blocking pattern 211 is formed of a metal such as chromium (Cr) or a black resin to partially block light. The blocking pattern 211 is formed in a vertical (column) line shape to selectively block light according to the left viewing angle region and the right viewing angle region around the front viewing angle region. That is, the blocking pattern 211 blocks light from two subpixels among three adjacent subpixels according to the front viewing angle region, the left viewing angle region, and the right viewing angle region, and the transmission unit 231 is provided from the other subpixel. It transmits light.

In more detail, when viewing the liquid crystal panel in the right viewing angle region, the blocking pattern 211 in the first sub-image area SP1 blocks light from the G3 subpixel and the G2 subpixel, and the transmission unit 231 It transmits light from the R1 subpixel. The blocking pattern 211 in the second sub-image area SP2 blocks light from the B3 subpixel and the R2 subpixel, and the transmission unit 231 transmits the light from the B1 subpixel. The blocking pattern 211 in the third sub image area SP3 blocks light from the R3 subpixel and the B2 subpixel, and the transmission unit 231 transmits the light from the G1 subpixel.

In addition, when viewing the liquid crystal panel in the left viewing angle region, the blocking pattern 211 in the first sub image area SP1 blocks light from the G3 subpixel and the R1 subpixel, and the transmission unit 231 from the G2 subpixel. Transmits light. The blocking pattern 211 in the second sub image area SP2 blocks light from the B1 subpixel and the B3 subpixel, and the transmission unit 231 transmits the light from the R2 subpixel. The blocking pattern 211 in the third sub image area SP3 blocks light from the G1 subpixel and the R3 subpixel, and the transmission unit 231 transmits the light from the B2 subpixel.

When the liquid crystal panel is viewed in the front viewing angle region, the blocking pattern 211 in the first sub-image region SP1 blocks light from the G2 subpixel and the R1 subpixel, and the transmission unit 231 from the G3 subpixel. Transmits light. The blocking pattern 211 in the second sub-image area SP2 blocks light from the B1 subpixel and the R2 subpixel, and the transmission unit 231 transmits the light from the B3 subpixel. The blocking pattern 211 in the third sub image area SP3 blocks light from the G1 subpixel and the B2 subpixel, and the transmission unit 231 transmits the light from the R3 subpixel.

Accordingly, in the right viewing angle region, ① is displayed as a combination of R1 displayed in the first sub-image area SP1, B1 displayed in the second sub-image area SP2, and G1 displayed in the third sub-image area SP3. Image is displayed in the left viewing angle region by a combination of G2 displayed in the first sub-image area SP1, R2 displayed in the second sub-image area SP2, and B2 displayed in the third sub-image area SP3. Is a combination of G3 displayed in the first sub-image area SP1, B3 displayed in the second sub-image area SP2, and R3 displayed in the third sub-image area SP3 in the front viewing angle region. You can see the image of ③ displayed by.

The light blocking wall 241 blocks the subpixels seen in each of the left, right, and front viewing angle regions from interfering with the subpixels of the other viewing angle regions.

The light blocking wall 241 is formed to correspond to the boundary of each of the blocking patterns 211. The light blocking wall 241 is formed to be long in the form of a vertical (column) line together with the blocking pattern 211.

For example, the light blocking wall 241 is a light leakage that proceeds from the second sub-image area to the left viewing angle when the viewer views an image of the G2 sub-pixel displayed in the first sub-image area SP1 in the left viewing angle area. That is, the images of the B1 and B3 subpixels are blocked. Accordingly, the viewer located in the left viewing angle region can see only the image of the G2 subpixel without the image interference of the B1 and B3 subpixels. In the same case, only the image of the R2 subpixel can be viewed without interference of the subpixels G1 and R3 in the second sub-image region SP2, and the image of the subpixel of B2 without the interference of the subpixels R1 and G3 in the third sub-image region SP3 can be seen. Only the image of the sub-pixel can be viewed.

In addition, the light blocking wall 241 may include a light leakage, that is, R3, traveling from the third image area to the right viewing angle when the viewer views an image of the R1 subpixel displayed in the first sub-image area SP1 in the right viewing angle area. Block the B2 sub-pixel image. Accordingly, the viewer located in the right viewing angle region can view only the image of the R1 subpixel without the image interference of the R3 and B2 subpixels.

In the same case, in the second sub-image area SP2, only the image of the B1 sub-pixel can be seen without the image interference of the G3 and G2 sub-pixels, and in the third sub-image area SP3, the image of the sub-pixels G2 and G3 is not displayed. Only the image of the sub-pixel can be viewed.

In addition, when the viewer views an image of the G3 subpixel displayed in the first sub-image area SP1 at the front viewing angle, the light leakage proceeds from the first sub-image area SP1 to the front viewing angle, that is, the R1 and G2 subpixels. Block the video. Accordingly, the viewer located at the front viewing angle can view only the image of the G3 subpixel without the image interference of the R1 and G2 subpixels. In the same case, only the image of the B3 subpixel can be seen in the second sub-image area SP2 without interference of the sub-images of the B1 and R2 subpixels, and the image interference of the B2 and G1 sub-pixels is also seen in the third sub-image region SP3. Only the image of the R3 subpixel can be seen without.

An overcoat layer 261 is further formed between the upper insulating substrate 201 on which the mask filter 221 and the light blocking wall 241 are formed and the color filter array 281 to planarize the color filter array 281. .

Meanwhile, R1, G3, and G2 subpixels are arranged in the first sub-image area SP1, and B1, B3, and R2 subpixels are arranged in the second sub-picture area SP2, and the third sub-image area ( In SP3), only the color filter array 280 disposed in the order of the G1, R3, and B2 sub-pixels is mentioned. However, the arrangement of each sub-pixel in each sub-image area may be changed.

For example, subpixels for displaying an image of ① in the right viewing angle region, that is, R1, G1, and B1 may be disposed in subpixels located on the left side among the three subpixels in each subimage region, and the left viewing angle The subpixels for displaying the image of ② in the area, that is, R2, G2, and B2 may be disposed in the subpixels located on the right side among the three subpixels of each sub-image area, and the image of ③ in the front viewing angle area. The subpixels for display, that is, R3, G3, and B3, may be disposed in subpixels positioned at the center of three subpixels of each sub-image area.

As described above, the triple view liquid crystal display according to the present invention uses a mask filter 221 formed on the inner surface of the upper plate 301 to display different images according to left and right front viewing angles with one display device. In the left, right, and front viewing angle regions by the light blocking wall 241, the viewer can see only a desired image without interference of other images.

In the above, the triple view liquid crystal display device in which the mask filter and the light blocking wall are formed in contact with each other is described. Hereinafter, the cross-sectional structure of the triple view liquid crystal display device having the color filter array in which the mask filter and the light blocking wall are formed to be spaced apart from each other is illustrated. It is.

First, the third embodiment of the present invention discloses a triple view liquid crystal display device having a mask filter and a light blocking wall spaced apart from each other, and having a color filter array defined by first, second, and third pixel regions.

3 illustrates a cross-sectional structure of a triple view liquid crystal display according to a third exemplary embodiment of the present invention.

As shown in FIG. 3, the triple view liquid crystal display includes a lower plate 102, an upper plate 302 on which a mask filter 222 and a light blocking wall 242 are formed, and an upper plate 302 and a lower plate 102. The liquid crystal panel including the formed liquid crystal layer 182 is provided.

The lower plate 102 has the same structure as the lower plate 10 shown in the first embodiment.

The upper plate 302 includes a mask filter 222, a light blocking wall 242, and a color filter array 282 stacked on an inner surface of the upper insulating substrate 202.

The color filter array 282 includes a black matrix for dividing each subpixel region and a red (hereinafter R), green (hereinafter B), and blue (hereinafter B) color filter respectively formed in the subpixel region. In addition, when the common electrode is not formed on the lower plate 102, the common electrode may be formed on the color filter array 282.

The mask filter 222 has a structure in which the blocking pattern 212 for blocking light is repeatedly arranged with the transmission part 232 interposed therebetween. That is, the blocking pattern 21 and the transmission part 23 have a structure in which they are alternately arranged alternately.

The blocking pattern 212 is formed of a metal such as chromium (Cr) or a black resin to partially block light. The blocking pattern 212 is formed in a vertical (column) line shape to selectively block light according to the left viewing angle region and the right viewing angle region with respect to the front viewing angle region. That is, the blocking pattern 212 blocks light from two pixels among three adjacent pixel areas P1, P2, and P3 according to the front viewing angle area, the left viewing angle area, and the right viewing angle area, and the transmission part 232 is It transmits light from the other pixel. Each of the pixel areas P1, P2, and P3 includes R, G, and B subpixels.

In more detail, when the liquid crystal panel is viewed in the right viewing angle region, the blocking pattern 212 blocks light from the first pixel region P1 and the second pixel region P2, and the transmission unit 232 transmits the third portion to the third liquid crystal panel. The light from the pixel region P3 is transmitted.

In addition, when viewing the liquid crystal panel in the left viewing angle region, the blocking pattern 212 blocks light from the third pixel region P3 and the second pixel region P2, and the transmission unit 232 transmits the first pixel region P1. Transmits light from

When the liquid crystal panel is viewed in the front viewing angle region, the blocking pattern 212 blocks light from the first pixel region P1 and the third pixel region P3, and the transmission unit 232 transmits the second pixel region P2. Transmits light from

As a result, an image of? Displayed in the combination of the third pixel region P3 is displayed in the right viewing angle region, and an image of? Displayed in the combination of the first pixel region P1 is displayed in the left viewing angle region; The image of ② displayed by the combination of the two pixel areas P2 can be seen. To this end, the video signal of ① is supplied to the first pixel region, the video signal of ② to the second pixel region, and the ③ video signal to the third pixel region.

The light blocking wall 242 blocks different images ①, ②, and ③ from each of the left, right, and front viewing angle regions from interfering with the images of the relative viewing angle regions.

The light blocking wall 242 is formed to overlap the central portion of each of the blocking patterns 222, for example, to overlap the boundary portions of three adjacent pixel regions P1, P2, and P3. In other words, the light blocking wall 242 is elongated in the form of a vertical (column) line together with the blocking pattern 221.

For example, the light blocking wall 242 is located on the left side from the second and third pixel areas P2 and P3 when the viewer views an image of ① displayed in the combination of the first pixel area P1 in the left viewing angle area. It blocks light leakage that progresses to the viewing angle area, that is, ②, ③ images. Accordingly, the viewer located in the left viewing angle region can see only the image of ① without interference of the images ② and ③.

In addition, the light blocking wall 242 has a right viewing angle region from the first and second pixel regions P1 and P2 when the viewer views an image of ③ displayed by a combination of the third pixel regions P3 in the right viewing angle region. Light leakage proceeds to, that is, ①, ② block the image. Accordingly, the viewer located in the right viewing angle region can see only the image of ③ without the interference of the ① and ② images.

The light blocking wall 242 is a front viewing angle region from the first and third pixel regions P1 and P3 when the viewer views an image of ② displayed in a combination of the second pixel regions P2 in the front viewing angle region. Block the light leakage that proceeds to, ①, ③ video. Accordingly, the viewer located in the front viewing angle region can see only the image of ② without interference of the ① and ③ images.

The first and second overcoat layers 262a may be used to planarize the color filter array 282 between the upper insulating substrate 202 and the color filter array 282 on which the mask filter 222 and the light blocking wall 242 are formed. 262b) is further formed.

As described above, the triple view liquid crystal display according to the present invention uses a mask filter 222 formed on the inner surface of the upper plate 302 to display different images according to left and right front viewing angles with one display device. In the left, right, and front viewing angle regions by the light blocking wall 242, the viewer can see only a desired image without interference of other images.

Next, a fourth embodiment of the present invention discloses a triple view liquid crystal display device having a mask filter and a light blocking wall spaced apart from each other, and having a color filter array defined by first, second, and third subpixel regions. It was.

4 illustrates a cross-sectional structure of a triple view liquid crystal display according to a fourth exemplary embodiment of the present invention.

As shown in FIG. 4, the triple view liquid crystal display includes a lower plate 103, an upper plate 303 on which a mask filter 223 and a light blocking wall 243 are formed, and an upper plate 303 and a lower plate 103. The liquid crystal panel including the formed liquid crystal layer 183 is provided.

The lower plate 103 has a structure similar to the lower plate 10 shown in the first embodiment.

The upper plate 303 includes a mask filter 223, a light blocking wall 243, and a color filter array 283 stacked on an inner surface of the upper insulating substrate 203.

The color filter array 283 includes red (hereinafter R), green (hereinafter B) and blue (hereinafter B) color filters respectively formed in the subpixel area. In addition, when the common electrode is not formed on the lower plate 103, the common electrode may be formed on the color filter array 283.

The color filter array 283 is defined as a first sub image area SP1, a second sub image area SP2, and a third sub image area SP3, and three sub pixels are disposed in each sub image area. .

For example, R1, G3, and G2 subpixels are disposed in the first sub-image region SP1, B1, B3, and R2 subpixels are disposed in the second sub-image region SP2, and the third sub-image region ( SP3) are arranged as subpixels G1, R3, and B2.

The mask filter 223 has a structure in which the blocking pattern 213 for blocking light is repeatedly arranged with the transmission part 233 interposed therebetween. That is, the blocking pattern 213 and the transmission part 233 have a structure in which they are alternately arranged alternately.

The blocking pattern 213 is formed of a metal such as chromium (Cr) or black resin to partially block light. The blocking pattern 213 is formed in a vertical (column) line shape to selectively block light according to the left viewing angle region and the right viewing angle region around the front viewing angle region. That is, the blocking pattern 213 blocks light from two subpixels among three adjacent subpixels according to the front viewing angle region, the left viewing angle region, and the right viewing angle region, and the transmission unit 233 is separated from the other subpixels. It transmits light.

In more detail, when viewing the liquid crystal panel in the right viewing angle region, the blocking pattern 213 in the first sub-image area SP1 blocks light from the G3 subpixel and the G2 subpixel, and the transmission unit 233 It transmits light from the R1 subpixel. The blocking pattern 213 in the second sub image area SP2 blocks light from the B3 subpixel and the R2 subpixel, and the transmission unit 233 transmits the light from the B1 subpixel. The blocking pattern 213 in the third sub image area SP3 blocks light from the R3 subpixel and the B2 subpixel, and the transmission unit 233 transmits the light from the G1 subpixel.

In addition, when viewing the liquid crystal panel in the left viewing angle region, the blocking pattern 213 in the first sub-image area SP1 blocks light from the G3 subpixel and the R1 subpixel, and the transmission unit 233 from the G2 subpixel. Transmits light. The blocking pattern 213 in the second sub image area SP2 blocks light from the B1 subpixel and the B3 subpixel, and the transmission unit 233 transmits the light from the R2 subpixel. The blocking pattern 213 in the third sub-image area SP3 blocks light from the G1 subpixel and the R3 subpixel, and the transmission unit 233 transmits the light from the B2 subpixel.

In addition, when viewing the liquid crystal panel in the front viewing angle region, the blocking pattern 213 in the first sub-image region SP1 blocks light from the G2 subpixel and the R1 subpixel, and the transmission unit 233 from the G3 subpixel. Transmits light. The blocking pattern 213 in the second sub image area SP2 blocks light from the B1 subpixel and the R2 subpixel, and the transmission unit 233 transmits the light from the B3 subpixel. The blocking pattern 213 in the third sub-image area SP3 blocks light from the G1 subpixel and the B2 subpixel, and the transmission unit 233 transmits the light from the R3 subpixel.

Accordingly, in the right viewing angle region, ① is displayed as a combination of R1 displayed in the first sub-image area SP1, B1 displayed in the second sub-image area SP2, and G1 displayed in the third sub-image area SP3. Image is displayed in the left viewing angle region by a combination of G2 displayed in the first sub-image area SP1, R2 displayed in the second sub-image area SP2, and B2 displayed in the third sub-image area SP3. Is a combination of G3 displayed in the first sub-image area SP1, B3 displayed in the second sub-image area SP2, and R3 displayed in the third sub-image area SP3 in the front viewing angle region. You can see the image of ③ displayed by.

The light blocking wall 243 blocks the subpixels seen in each of the left, right, and front viewing angle regions from interfering with the subpixels of the other viewing angle regions.

The light blocking wall 243 is formed to correspond to the boundary of each blocking pattern 213. The light blocking wall 243 is formed to be long in the form of a vertical (column) line together with the blocking pattern 213.

For example, when the viewer views an image of the G2 sub-pixel displayed in the first sub-image area SP1 in the left viewing angle area, the light blocking wall 243 is a light leak that travels from the second sub-image area to the left viewing angle. Blocks video from subpixels B1 and B3. Accordingly, the viewer located in the left viewing angle region can see only the image of the G2 subpixel without the image interference of the B1 and B3 subpixels. In the same case, only the image of the R2 subpixel can be viewed without interference of the subpixels G1 and R3 in the second sub-image region SP2, and the image of the subpixel of B2 without the interference of the subpixels R1 and G3 in the third sub-image region SP3 can be seen. Only the image of the sub-pixel can be viewed.

In addition, when the viewer views an image of the R1 subpixel displayed in the first sub-image area SP1 in the right viewing angle area, the light blocking wall 243 may include a light leakage that is advanced from the third image area to the right viewing angle, that is, R3, Block the B2 sub-pixel image. Accordingly, the viewer located in the right viewing angle region can view only the image of the R1 subpixel without the image interference of the R3 and B2 subpixels.

In the same case, in the second sub-image area SP2, only the image of the B1 sub-pixel can be seen without the image interference of the G3 and G2 sub-pixels, and in the third sub-image region SP3, the image of the sub-pixels G2 and G3 is not shown Only the image of the sub-pixel can be viewed.

In addition, when the viewer views an image of the G3 subpixel displayed in the first sub-image area SP1 at the front viewing angle, the light leakage proceeds from the first sub-image area SP1 to the front viewing angle, that is, the R1 and G2 subpixels. Block the video. Accordingly, the viewer located at the front viewing angle can view only the image of the G3 subpixel without the image interference of the R1 and G2 subpixels. In the same case, only the image of the B3 subpixel can be seen in the second sub-image area SP2 without interference of the sub-images of the B1 and R2 subpixels, and the image interference of the B2 and G1 sub-pixels is also seen in the third sub-image region SP3. Only the image of the R3 subpixel can be seen without.

The first and second overcoat layers 263a may be used to planarize the color filter array 283 between the upper insulating substrate 203 and the color filter array 283 on which the mask filter 223 and the light blocking wall 243 are formed. , 263b) is further formed.

Meanwhile, R1, G3, and G2 subpixels are arranged in the first sub-image area SP1, and B1, B3, and R2 subpixels are arranged in the second sub-picture area SP2, and the third sub-image area ( In SP3), only the color filter array 280 disposed in the order of the G1, R3, and B2 sub-pixels is mentioned, but the arrangement of each sub-pixel in each sub-image area may be changed.

For example, subpixels for displaying an image of ① in the right viewing angle region, that is, R1, G1, and B1 may be disposed in subpixels located on the left side among the three subpixels in each subimage region, and the left viewing angle The subpixels for displaying the image of ② in the area, that is, R2, G2, and B2 may be disposed in the subpixels located on the right side among the three subpixels of each sub-image area, and the image of ③ in the front viewing angle area. The subpixels for display, that is, R3, G3, and B3, may be disposed in subpixels positioned at the center of three subpixels of each sub-image area.

5A through 5D are cross-sectional views illustrating a method of manufacturing the top plates 30 and 301 in the triple view LCD according to the first and second embodiments of the present invention. 5A to 5D, only the top plate 30 of the first embodiment is described, but the same applies to the top plate 301 of the second embodiment.

First, as shown in FIG. 5A, a mask filter 22 and a light blocking wall 24 are formed on the upper insulating substrate 20. The mask filter 22 and the light blocking wall 24 are formed of a metal or black resin such as chromium or the like.

For example, after depositing a black resin layer on the upper insulating substrate 20, after aligning the halftone mask having the blocking portion and the semi-transmissive portion, and performing a photolithography process, a photoresist pattern on the black resin layer Form. In this case, the thickness of the region corresponding to the transflective portion is thinner than that of the region corresponding to the blocking portion of the halftone mask.

Subsequently, by patterning the black resin layer using the photoresist pattern as a mask, the black resin patterns having the same shape as that of the blocking pattern 21 to be formed in the subsequent process, that is, the same line width, and the transmissive portion (a) between the black resin patterns are formed. 23) is formed. Then, the blocking pattern 21 and the light blocking wall 24 superimposed on the blocking pattern 21 are integrated by removing the thin portion of the photoresist pattern and reducing the thickness of the exposed black resin pattern by an ashing process. It is formed into a structure.

As shown in FIG. 5B, an overcoat layer 26 for planarization is formed on the upper substrate 20 on which the light blocking wall 24 and the mask filter 22 are formed. The overcoat layer 26 is formed of an organic insulating material and is formed to have the same surface as the light blocking wall 24. That is, the overcoat layer 26 has the same height as the light blocking wall 24 while filling the space between the transmissive portion 23 and the light blocking wall 24 of the mask filter 22.

As shown in FIG. 5C, a black matrix 32 is formed over the overcoat layer 26. The black matrix 32 is formed by forming a metal or black resin layer such as chromium or the like on the overcoat layer 26 and patterning the same by a photolithography process, which may define each subpixel region.

As shown in FIG. 5D, R, G, and B color filters 28 are formed on the overcoat layer 26 on which the black matrix 32 is formed. The R, G, and B color filters 28 are sequentially formed on the overcoat layer 26 on which the black matrix 32 is formed by repeating three mask processes of forming and patterning a pigment layer of a corresponding color.

The upper plate 30 and the lower plate on which the thin film transistor array is formed are bonded to each other with the liquid crystal layer interposed therebetween to form a liquid crystal panel.

6A through 6E are cross-sectional views illustrating a method of manufacturing the top plates 302 and 303 in the triple view liquid crystal display according to the third and fourth embodiments of the present invention. 6A to 6E, only the top plate 302 of the third embodiment is described, but the same applies to the top plate 303 of the fourth embodiment.

First, as shown in FIG. 6A, a mask filter 222 is formed on the upper insulating substrate 202. The mask filter 222 is formed of a metal or black resin such as chromium or the like.

For example, after depositing a black resin layer on the upper insulating substrate 202, a photolithography process is performed to form a photoresist pattern on the black resin layer. Subsequently, the black resin layer is patterned using the photoresist pattern as a mask, so that the mask filter 222 having the blocking pattern 212 and the transmission portion 232 is formed.

As illustrated in FIG. 6B, a first overcoat layer 262a for planarization is formed on the upper insulating substrate 202 on which the mask filter 222 is formed. The first overcoat layer 262 is formed of an organic insulating material.

As illustrated in FIG. 6C, the light blocking wall 242 is formed on the upper insulating substrate 202 on which the first overcoat layer 262a is formed. The light blocking wall 242 is formed of a metal or black resin such as chromium or the like. For example, after depositing a black resin layer on the upper insulating substrate 202, a photolithography process is performed to form a photoresist pattern on the black resin layer. Subsequently, the light blocking wall 242 is formed by patterning the black resin layer using the photoresist pattern as a mask.

As shown in FIG. 6D, a second overcoat layer 262b for planarization is formed on the upper insulating substrate 202 on which the light blocking wall 242 is formed. The second overcoat layer 262b is formed of an organic insulating material and is formed to have the same surface as the light blocking wall 242. That is, the second overcoat layer 262b has the same height as the light blocking wall 242 while filling the space between the light blocking walls 242.

As shown in FIG. 6E, R, G, and B color filters 282 are formed on the upper insulating substrate 202 on which the second overcoat layer 262b is formed. The R, G, and B color filters 280 are sequentially formed on the second overcoat layer 262 by repeating three mask processes of forming and patterning a pigment layer of a corresponding color.

The upper plate 302 and the lower plate on which the thin film transistor array is formed are bonded to each other with the liquid crystal layer interposed therebetween to form a liquid crystal panel.

As described above, the triple view liquid crystal display according to the present invention can show different images according to the left and right front viewing angles with one display device by using a mask filter formed on the inner surface of the upper plate, In each of the front viewing angle regions, the viewer can see only the desired image without interference from other images.

Claims (20)

A liquid crystal display panel having first pixels displaying a first image, second pixels displaying a second image, and third pixels displaying a third image; A mask filter including a blocking pattern and a transmission part formed in the upper plate of the liquid crystal display panel to transmit the first, second and third images to different viewing angle regions; And a light blocking wall formed in the upper plate to correspond to the blocking pattern of the mask filter. The triple view liquid crystal display of claim 1, wherein each of the first pixel, the second pixel, or the third pixel comprises three sub-pixels adjacent to each other. The triple view liquid crystal display of claim 1, wherein the first pixel, the second pixel, and the third pixel comprise nine sub-pixels adjacent to each other. 4. The method of claim 3, wherein the first pixel is disposed of three selected subpixels of the nine subpixels, and the second pixel is selected from six subpixels except for three subpixels selected as the first pixel. And three subpixels, and the third pixel is disposed in the remaining subpixels except for the six subpixels selected from the first and second pixels. According to claim 1, And a liquid crystal display panel including the upper plate and a lower plate bonded to the upper plate with the liquid crystal layer interposed therebetween. The method of claim 5, wherein the top plate An insulating substrate on which the light blocking wall and the mask filter are formed; And a first overcoat layer on the insulating substrate on which the light blocking wall and the mask filter are formed. The triple view liquid crystal display of claim 6, further comprising a second overcoat layer formed between the light blocking wall and the mask filter. The triple view liquid crystal display of claim 6, further comprising a color filter array including a black matrix and a color filter. 7. The triple view liquid crystal display of claim 6, wherein the first overcoat layer is formed at the same height as the light blocking wall. 5. The triple view liquid crystal display according to any one of claims 2, 3 and 4, wherein the sub-pixels are composed of sub-pixel lines. The triple view liquid crystal display of claim 1 or 10, wherein the blocking pattern and the light blocking wall have a line shape formed in the same direction as the subpixel line. The triple view liquid crystal display of claim 11, wherein the blocking pattern is alternately formed with the transmission part. The method of claim 11, wherein the light blocking wall is And the first, second, and third images each block light leakage from the relative viewing angle region. The triple view liquid crystal display of claim 1, wherein each of the first image, the second image, and the third image is a left viewing angle region, a right viewing angle region, and a front viewing angle region. Forming a mask filter having a blocking pattern and a transmission portion on the insulating substrate; Forming a light blocking wall corresponding to the blocking pattern; And forming a first overcoat layer on the insulating substrate on which the light blocking wall and the mask filter are formed. The method of claim 15, wherein the light blocking wall is formed to overlap a central portion of the blocking pattern. 16. The method of claim 15, wherein the light blocking wall is formed at a boundary of the blocking pattern. 16. The method of claim 15, further comprising forming a color filter on the first overcoat layer. 19. The method of claim 18, further comprising forming a black matrix between the first overcoat layer and the color filter. 16. The method of claim 15, further comprising forming a second overcoat layer between the mask filter and the light blocking wall.

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