KR101338618B1 - Dual view display and manufacturing method thereof - Google Patents

Abstract

A dual view display device according to the present invention includes a first substrate having a color filter formed on each pixel of the front surface; A barrier layer formed on the back surface of the first substrate at predetermined intervals and disposed in the dent region; A second substrate disposed opposite the first substrate and having a driving element and a pixel electrode of each pixel; It includes a liquid crystal interposed between the first substrate and the second substrate.

Accordingly, the dual view display device according to the present invention can display two images on one display device according to an angle viewed by a user by placing a barrier layer on a first substrate on which a color filter can be formed. In addition, by forming a barrier part on the first substrate on which the color filter is formed, it is possible to reduce the manufacturing cost of the dual view display device.

In the method of manufacturing the dual view display device according to the present invention, the pixel and barrier film vertical gaps (D) can be easily adjusted by adjusting the etching conditions of the first substrate in the process of forming the barrier film on the first substrate, and the barrier film on one substrate. And the pixel are formed, so that misalignment between the pixels can be prevented and the alignment process between the pixel and the barrier film can be improved.

Description

Dual view display device and manufacturing method thereof {DUAL VIEW DISPLAY AND MANUFACTURING METHOD THEREOF}

1 is a view showing an embodiment of a conventional dual view display device.

2 is a cross-sectional view of a conventional dual view display device.

3 is a cross-sectional view showing a dual view display device according to the present invention;

4A to 4H are flowcharts illustrating a method of forming a dual view display device according to the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS (S)

  1: dual view display device 110: first substrate

130: color filter 150: barrier portion

153: protrusion area 156: dent area

160: barrier film 190: first polarizing plate

210: second substrate 230: drive element

250: pixel electrode 290: second polarizing plate

The present invention relates to a dual view display device and a manufacturing method thereof.

Conventional display devices have been designed to be viewed simultaneously by multiple users. The characteristics of the display device are made so that multiple users can see the same high quality images from different angles.

For example, it is effective when public information needs the same information in public places.

However, each user may need different information. For example, in a car, a driver may request navigation information, and passengers may request other information, such as movies and news.

This conflicting demand can be solved by providing two display devices, but this takes up excessive space and causes a problem in that the cost of providing two display devices is not small.

To solve this problem, multi-view directional displays have been developed. One use of a multiview directional display is a dual view display.

The dual view display device can simultaneously display two or more images on one display device, and each image can be viewed only in a specific direction, so that an observer looking in one direction will see one image, and viewing in another direction. The observer will see another image.

Therefore, a display device that provides different images to two or more users has an advantage of saving space and cost compared to using two or more individual display devices.

1 is a diagram illustrating an example in which a conventional dual view display device is applied.

Referring to FIG. 1, the dual view display device 501 may display different information according to a viewing direction.

The dual view display device 501 is a device that can watch TV in the passenger seat and car navigation in the driver's seat.

In this way, different images can be viewed on a single display device in daily life, thereby reducing the space and cost.

In another embodiment, a monitor that displays a PC screen to the viewer on the left and a TV to the viewer on the right, a presentation on the customer side with internal data on the salesperson side, and a person from the left and right And a display that can display other advertisements to people coming from, and a display that can display upstairs guidance to those who go up the escalator and downstairs guidance to those who go down.

2 is a cross-sectional view illustrating a conventional dual view display device. Here, the liquid crystal display is described as an embodiment.

Referring to FIG. 2, the dual view display device 501 includes a liquid crystal panel 505 and a barrier substrate 650 having a barrier layer 660.

The dual view display device 501 includes an upper plate 610 and a lower plate 710, and a liquid crystal 810 between the upper and lower plates 610 and 710 to adjust the amount of light transmitted.

The upper plate 610 includes a color filter 630 having various colors, a black matrix to prevent color mixing.

The lower plate 710 is aligned with a plurality of driving elements 730 capable of driving the liquid crystal 810. Here, the plurality of aligned driving elements 730 is represented in approximately one layer.

The liquid crystal 810 is operated when a driving signal is applied from the driving element 730 to adjust an amount of light provided to display an image.

As such, the liquid crystal panel 505 may be formed by bonding the upper plate 610 and the lower plate 710 to each other. The color filter 630 and the pixel electrode 750 correspond to each other to define a minimum unit that can display one color as the pixel P ′. (The minimum unit may be a pixel or a dot (sub-pixel). Here, the pixel will be described as a pixel.)

A barrier substrate 650 is provided on the liquid crystal panel 505 to display different information when the dual view display device 501 is viewed from the left side and from the right side.

The barrier substrate 650 has a barrier layer 660 formed of a material capable of shielding light on the mother substrate 670.

The barrier substrate 650 may be provided on the rear surface of the upper plate 610 to simultaneously display different information in two left and right directions of the dual view display panel 505.

The barrier layer 660 is disposed at a position corresponding to the two pixels P ′.

As described above, the barrier substrate 650 having the barrier layer 660 is attached on the rear surface of the upper plate 610 of the dual view display panel 505 to be different from each other in the left and right directions of the dual view display panel 505. Images can be displayed simultaneously.

The dual view display device 501 may be formed on the dual view display panel 505 by providing polarizing plates 690 and 790 and a backlight unit.

In order to display two images, the distance between the barrier layer 660 and the pixel P 'must be adjusted.

However, due to the thickness of the upper panel 610, the dual view display panel 505 makes it difficult to adjust the vertical gap D ′ between the pixel P ′ and the barrier layer 660.

Thus, the vertical gap D 'is adjusted by further performing a thinning process (for example, grinding or etching) of the glass of the upper plate 610.

The grinding process of cutting the glass substrate of the upper plate 610 has a problem that the glass substrate may be damaged in the process because the surface of the glass substrate is cut, and it is difficult to constantly form the vertical gap D 'through grinding. There is this.

In addition, since the barrier substrate 650 and the liquid crystal panel 505 are manufactured to attach the barrier substrate 650 to the liquid crystal panel 505, misalignment between the barrier layer 660 and the pixel P ′ is performed. There is a problem that can occur.

In addition, since the barrier substrate 650 is manufactured and attached separately, the manufacturing cost of the dual view display device 501 is also increased.

SUMMARY OF THE INVENTION An object of the present invention is to provide a dual view display device which can reduce cost by eliminating an additional barrier substrate by directly forming a barrier layer on a substrate.

According to the present invention, since the glass substrate is not cut by directly forming a barrier layer on the substrate, the gap between the pixel and the barrier layer can be easily adjusted and the alignment between the pixel and the barrier layer can be facilitated. There is another purpose in providing this.

In order to achieve the above technical problem, the dual view display device of the present invention includes a first substrate having a color filter formed on each pixel of the front surface; A barrier layer formed on the back surface of the first substrate at predetermined intervals and disposed in the dent region; A second substrate disposed opposite the first substrate and having a driving element and a pixel electrode of each pixel; It includes a liquid crystal interposed between the first substrate and the second substrate.

According to an aspect of the present invention, there is provided a method of manufacturing a dual view display device, including forming a plurality of substrate patterns on a first surface of a substrate; Performing an etching process using the plurality of substrate patterns as a mask and forming a dent region on the substrate; Stripping the plurality of patterns; Depositing an opaque resin on the substrate to form a barrier film in the dent region; Forming a plurality of color filters on each pixel on the second surface of the substrate; .

Hereinafter, a dual view display device and a method of manufacturing the same according to embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the following embodiments, which are common in the art. Those skilled in the art will be able to implement the invention in various other forms without departing from the spirit of the invention. In the accompanying drawings, the dimensions of the first substrate, the barrier film, and the second substrate are shown in an enlarged scale than actual for clarity of the present invention. In the present invention, when the first substrate, barrier film, second substrate and other structures are referred to as being formed "on", "upper" or "lower", the first substrate, barrier film, second substrate. And other structures directly formed on or below the first substrate, barrier film, second substrate, and other structures, or other first substrates, barrier films, second substrates, and other structures may further be added on the substrate. Can be formed.

3 is a cross-sectional view illustrating a dual view display device according to an exemplary embodiment of the present invention. Here, the dual view display device will be described as an embodiment of the liquid crystal display device.

Referring to FIG. 3, the dual view display apparatus 1 includes a second substrate 210 including a driving device 230, a pixel electrode 250 connected to the driving device 230, and a color filter formed on the front surface. 130 and a first substrate 110 having a barrier portion 150 having a dent region 156 and a protrusion region 153 formed on the rear surface.

The second substrate 210 includes a plurality of driving devices 230 and pixel electrodes 250 respectively connected to the driving devices 230.

A color filter 130 having a plurality of colors is formed on the first substrate 110. The back surface of the first substrate 110 on which the color filter 130 is formed may form a barrier portion 150.

The barrier unit 150 includes a protruding region 153 and a dent region 156 that is alternately formed with the protruding region 153.

The protruding region 153 is a transmissive region capable of transmitting light, and the dent region 156 is formed with a barrier layer 160 filled with a shielding material capable of shielding light to block light in a predetermined direction. It is a light shielding area.

The first substrate 110 and the second substrate 210 are bonded to each other using a sealant or the like, and the liquid crystal layer 310 is interposed between the first substrate 110 and the second substrate 210 to display the dual view display panel. (5) is formed. The color filter 130 of the first substrate 110 and the pixel electrode 250 of the second substrate 210 correspond to each other, and the minimum unit that can express color is defined as the pixel P.

The barrier layer 160 may be disposed to correspond to the two pixels P. FIG.

The horizontal gap d between the barrier layer 160 and the pixel P may be aligned in the horizontal direction of the surface of the first substrate 110 according to the size of the pixel P. The vertical gap D between the barrier layer 160 and the pixel P may be lower than the barrier layer 160 and the pixel (ie, the color filter 130) depending on the angle at which the user views the image. It can be formed by adjusting the separation distance between the upper).

By the barrier layer 160 disposed as described above, the user located in the region a may view an image traveling in the a 'direction, and the user located in the region b may view an image traveling in the b' direction.

The dual view display device 1 may be formed by further providing first and second polarizing plates 190 and 290 and a backlight unit to the dual view display panel 5.

Accordingly, the dual view display device 1 may display the two or more images on one display device according to the viewing angle by arranging the barrier layer 160.

As such, by forming the color filter 130 and the barrier unit 150 together on the first substrate 110, the horizontal / vertical gap D / d between the barrier layer 160 and the pixel P is formed. That is, the separation distance between the color filter 130 and the barrier layer 160 can be easily aligned.

In addition, since the color filter 130 and the barrier unit 150 are formed on the first substrate 110, the barrier substrate for forming the barrier layer 160 does not need to be used separately, thereby reducing costs.

4A to 4H are flowcharts illustrating a method of forming a dual view display device according to an exemplary embodiment of the present invention.

As shown in FIG. 4A, a mother substrate 110a is provided and a substrate material is deposited on the mother substrate 110a to form a substrate layer 10. Here, the mother substrate 110a will be described as an embodiment of the glass substrate.

The base layer 10 may be made of a metal material such as chromium.

As shown in FIG. 4B, a substrate pattern 20 is formed by performing a photomask method on the substrate layer 10. Although not shown, a photoresist is applied to form a pattern with the substrate layer 10 to form a photoresist on the substrate layer 10, and a substrate pattern 20 is formed by performing an exposure and development process.

The substrate pattern 20 may be designed such that a barrier layer 160 aligned with a horizontal gap d is formed in a pixel formed in the dual view display panel 5 later.

As shown in FIG. 4C, an etchant is provided on the mother substrate 110a on which the substrate pattern 20 is formed. The etching solution may be an florin-based etching solution.

The etchant is protected in the region where the substrate pattern 20 is formed, the other open region is to etch the surface of the mother substrate (110a).

As illustrated in FIG. 4C, the mother substrate 110a may be etched to form a dent region 156 and a protruding region 153 which protrudes more than the dent region 156.

Here, the degree of etching of the mother substrate 110a may be adjusted to adjust the vertical gap D between the pixel P and the dent region 156 formed later.

As such, as the etching depth of the dent region 156 is adjusted in consideration of the degree of etching of the mother substrate 110a, the uniformity between the pixel P and the barrier layer 160 formed in the dent region 156 is adjusted. One vertical gap D can be formed.

In addition, the first substrate 110 may be formed by stripping the substrate pattern 20 formed on the mother substrate 110a. The substrate pattern 20 may be stripped to form a protruding region 153 protruding from the dent region 156.

As shown in FIG. 4D, a light shielding material is deposited on the first substrate 110 on which the protruding region 153 and the dent region 156 are formed. The light shielding material may be a material capable of absorbing light such as black resin. (A material that reflects light may be used, but an absorbing material is more preferable.)

The light shielding material 160a is deposited on the surface of the first substrate 110. The light shielding material 160a is deposited on the dent region 156 and the protruding protruding region 153 which enter into the groove formed in the first substrate 110.

However, the light shielding material is deposited on the entire surface of the first substrate 110. Accordingly, the light shielding material 160a is ground or polished to the surface of the protruding region 153 to serve as the first substrate 110 having the barrier portion 150.

As shown in FIG. 4E, the light absorbing material is ground, polished, or the like so that the light shielding material may be formed to fill the dent region 156 to form the barrier layer 160. The barrier layer 160 having a surface parallel to the surface may be formed.

As such, the barrier layer 160 may be formed on the first substrate 110 by filling the light shielding material in the dent region 156 to form the barrier layer 160.

Therefore, as the barrier portion 150 is formed by adjusting the etching degree of the mother substrate 110a, a vertical gap D between the pixel P formed later and the barrier layer 160 formed in the dent region 156 is formed. ) Can be easily formed.

Since the first substrate 110 includes the barrier unit 150, misalignment between the barrier film 160 and the pixel P formed later may be minimized. That is, it is possible to improve the process capability of the bonding process that can maintain the horizontal / vertical gap (d, D) for bonding the second substrate 210 and the first substrate 110 later.

As shown in FIG. 4F, a color filter 130 having a plurality of colors may be formed on the first substrate 110.

The color filter 130 may be formed on the rear surface of the first substrate 110 on which the barrier unit 150 is formed. The color filter 130 may form a black matrix between the color filters 130 so that different colors do not mix.

As shown in FIG. 4G, a second substrate 210 facing the first substrate 110 may be provided.

A plurality of driving elements 230 and a plurality of pixel electrodes 250 connected to the driving elements are provided on the second substrate 210. The second substrate 210 is provided, and the first substrate 110 and the second substrate 210 are bonded to each other.

A liquid crystal layer 310 may be formed by filling a liquid crystal between the first substrate 110 and the second substrate 210, and a sealant 330 may be provided to accommodate the liquid crystal to form the first substrate 110. And the second substrate 210 are bonded to each other. As such, the dual view display panel 5 may be formed by bonding the first substrate 110 and the second substrate together.

The dual view display panel 5 is one of two pixels for displaying the image in the left direction for the dual view, and the other is the pixel for displaying the image in the right direction.

Therefore, in the barrier layer 160, the barrier layer 160 is disposed between the two pixels P such that one pixel covers an image in one direction (that is, a horizontal gap d). Do.

As shown in FIG. 4H, a dual view display device 1 capable of simultaneously displaying two images with one display device by combining a polarizing plate, a backlight unit, and a driving circuit to the dual view display panel 5. Can be formed.

As described above, in the process of forming the barrier layer 160 on the first substrate 110, the etching condition of the first substrate 110 is adjusted to easily control the vertical gap D, and the barrier layer on one substrate. Since the pixel 160 and the pixel P are formed, misalignment between the pixel P and the barrier layer 160 can be prevented, thereby improving the alignment process.

Accordingly, by forming the barrier unit 150 on the first substrate 110 on which the color filter 130 is formed, the horizontal / vertical gaps D and d between the barrier layer 160 and the pixel of the barrier unit 150 are formed. It can be kept constant.

Accordingly, by placing the barrier layer 160 on the first substrate 110 capable of forming the color filter 130, two images may be displayed on one display device according to the viewing angle of the user. In addition, by forming the barrier unit 150 on the first substrate 110 on which the color filter 130 is formed, manufacturing cost of the dual view display device 1 can be reduced.

In the dual view display device according to the present invention, a barrier layer is disposed on a first substrate on which a color filter can be formed, so that two images can be displayed on one display device according to an angle viewed by a user. In addition, by forming a barrier part on the first substrate on which the color filter is formed, it is possible to reduce the manufacturing cost of the dual view display device.

In the method of manufacturing the dual view display device according to the present invention, the pixel and barrier film vertical gaps (D) can be easily adjusted by adjusting the etching conditions of the first substrate in the process of forming the barrier film on the first substrate, and the barrier film on one substrate. And the pixel are formed, so that misalignment between the pixels can be prevented, thereby improving the alignment process between the pixel and the barrier film.

Claims (9)

A first substrate having a color filter formed on each pixel of the front surface; A barrier film formed on a rear surface of the first substrate at predetermined intervals and between the protruding areas adjacent to each other; A second substrate disposed opposite the first substrate and having a driving element and a pixel electrode of each pixel; A liquid crystal interposed between the first substrate and the second substrate; And And a polarizing plate attached to a rear surface of the first substrate and in contact with the protruding region and the barrier layer. The method according to claim 1, And a polarizing plate is further attached to the second substrate. The method according to claim 1, And the barrier layer is formed of a light shielding material including black resin. The method according to claim 1, And the barrier layer is disposed between two pixel electrodes. The method according to claim 1, And the barrier layer maintains a predetermined distance from the pixel electrode. Forming a plurality of substrate patterns on the first surface of the substrate; Performing a etching process using the plurality of substrate patterns as a mask to form a dent region between the protruding regions spaced apart from each other and the protruding regions adjacent to each other on the substrate; Stripping the plurality of patterns; Depositing an opaque resin on the substrate to form a barrier film in the dent region; Forming a plurality of color filters on each pixel on the second surface of the substrate; And And attaching a polarizing plate in contact with the protruding region and the barrier layer on the first surface of the substrate. The method according to claim 6, And the substrate pattern is formed of a metal material containing chromium. The method according to claim 6, And the substrate is a glass substrate. The method according to claim 6, In the step of etching the substrate, The etching solution used in the etching process is a dual view display device manufacturing method characterized in that the etching solution of the Florin-based.

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