KR101363819B1 - Liquid crystal display device and multi screen liquid crystal display device having the same - Google Patents

Abstract

A liquid crystal display and a multi screen liquid crystal display having the same are disclosed. The liquid crystal display has a point light source for generating light, a light collecting cover for condensing the light generated in the point light source within a designated area, and having a port for receiving the point light source, An optical lens for improving an optical distribution and a liquid crystal display panel coupled to the light collecting cover to display an image using the light. When the display device for outdoor advertising is implemented, an image may be displayed from one liquid crystal display panel or a plurality of liquid crystal display panels by one point light source.

LCD, display panel, point light source, port, lens

Description

Liquid crystal display and multi-screen liquid crystal display using the same {LIQUID CRYSTAL DISPLAY DEVICE AND MULTI SCREEN LIQUID CRYSTAL DISPLAY DEVICE HAVING THE SAME}

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

FIG. 2 is an assembly view illustrating an assembly of the liquid crystal display shown in FIG. 1.

3 is a cross-sectional view of a liquid crystal display device according to a second embodiment of the present invention.

4 is a cross-sectional view illustrating a liquid crystal display device according to a third embodiment of the present invention.

5 is a plan view illustrating the point light source of FIG. 4.

6 is a cross-sectional view illustrating a liquid crystal display device according to a fourth embodiment of the present invention.

FIG. 7 is a plan view illustrating the point light source of FIG. 6.

8 is a cross-sectional view illustrating a liquid crystal display device according to a fifth embodiment of the present invention.

9 is a cross-sectional view of a liquid crystal display device according to a sixth embodiment of the present invention.

10 is a cross-sectional view illustrating a multi-screen liquid crystal display according to a seventh embodiment of the present invention.

FIG. 11 is a cross-sectional view illustrating another exemplary embodiment of the multi-screen liquid crystal display shown in FIG. 10.

12 is a block diagram showing a method for driving a multi-screen liquid crystal display according to a seventh embodiment of the present invention.

The present invention relates to a liquid crystal display and a multi-screen liquid crystal display using the same.

In recent years, the technology development of the information processing apparatus which processes a large amount of data, and the display apparatus which displays the data processed by the information processing apparatus as an image is progressing rapidly.

Typical display devices for displaying an image include a liquid crystal display, a flat panel display panel, and an organic light generating device.

Among them, a liquid crystal display device displays an image using liquid crystal, a flat panel display panel displays an image using plasma, and an organic light generating device displays an image using an organic light emitting layer.

Among them, the liquid crystal display device displays an image using a liquid crystal, which is a light receiving element, and therefore, light is provided to the liquid crystal in order to display the image from the liquid crystal display device.

Light used to display an image from a liquid crystal display device is mainly provided from light sources such as light emitting diodes, cold cathode ray tube lamps, and flat fluorescent lamps.

Recently, as the screen size of a liquid crystal display device increases, the number of light sources mounted on the liquid crystal display device, the length of the light source, and the area of the light source have gradually increased.

Recently, as the size of the liquid crystal display becomes larger, a technology for applying a large liquid crystal display to a large outdoor billboard is being developed. In order to provide light to a large liquid crystal display device applied to a large outdoor billboard or the like, a very large number of light sources and a light source having a very long length are required.

However, it is very difficult to fabricate a light source having a long length suitable for a large liquid crystal display device applied to a large outdoor billboard, and when using a light source having a short length, the number of light sources is increased and frequent replacement of the light sources is expected.

One object of the present invention is to provide a liquid crystal display device that provides light for displaying an image on a large liquid crystal display panel with a single light source.

Another object of the present invention is to provide a multi-screen liquid crystal display for displaying an image by providing light to a plurality of large liquid crystal display panels with a single light source.

A liquid crystal display device for realizing an object of the present invention has a point light source for generating light, and a port for receiving the point light source to condense the light generated in the point light source within a designated area. A light collecting cover, an optical lens coupled to the port to improve the optical distribution of the light, and a liquid crystal display panel coupled to the light collecting cover and displaying an image using the light.

According to another aspect of the present invention, there is provided a multi-screen liquid crystal display device having a bell shape, each having a concave port, and a plurality of condensing covers arranged in parallel, a point light source received in each port to generate light, And a liquid crystal display panel coupled to each of the ports and coupled to the optical lens for improving the optical distribution of the light, and to the plurality of condensing covers, respectively, to display an image using light passing through the optical lens.

Hereinafter, a liquid crystal display and a multi-screen liquid crystal display according to exemplary 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, and is generally used in the art. Those skilled in the art will be able to implement the present invention in various other forms without departing from the spirit of the present invention.

Liquid crystal display

Example  One

1 is an exploded cross-sectional view showing a liquid crystal display device according to a first embodiment of the present invention. FIG. 2 is an assembly view illustrating an assembly of the liquid crystal display shown in FIG. 1.

1 and 2, the liquid crystal display device 100 includes a point light source 10, a light collecting cover 20, an optical lens 30, and a liquid crystal display panel 40. Optionally, the liquid crystal display 100 may further include an optical member 50.

In this embodiment, the point light source 10 provides light to the liquid crystal display panel 40 to be described later. In the present embodiment, the point light source 10 may be a halogen lamp capable of generating high brightness light. In this embodiment, the point light source 10 is disposed to face the liquid crystal display panel 40.

The condensing cover 20 may have a bell shape as a whole. In the present embodiment, the light collecting cover 20 allows the light generated from the point light source 10 to uniformly reach the center of the liquid crystal display panel 40 to be described later as well as the edge of the liquid crystal display panel 40.

The condensing cover 20 may be made of a metal material having excellent light reflectance and excellent heat dissipation characteristics, for example, aluminum, brass, and the like, generated from the point light source 10. In addition, a light reflection layer 25 may be disposed on an inner surface of the light collecting cover 20 to improve the light reflectance of the light generated from the point light source 10.

The condensing cover 20 includes a pot 27 disposed at a vertex portion of the condensing cover 20 to receive the point light source 10. The port 27 has a shape protruding outward from the inside of the light collecting cover 20, and the point light source 10 is accommodated in the port 27.

The optical lens 30 is coupled to the inside of the condensing cover 20. Specifically, the optical lens 30 is disposed around the port 27 of the light collecting cover 20. The optical lens 30 changes a propagation path of light generated from the point light source 10 accommodated in the port 27 of the condensing cover 20.

The optical lens 30 may consist of concave lenses and convex lenses. The light generated from the point light source 10 by the optical lens 30 may provide light having a uniform optical distribution to the edge of the liquid crystal display panel 40 as well as the center of the liquid crystal display panel 40 to be described later. .

In the present embodiment, the liquid crystal display panel 40 may be manufactured for outdoor advertising, and thus, the liquid crystal display panel 40 may have a very large screen size. The liquid crystal display panel 40 is coupled to the light collecting cover 20, and the liquid crystal display panel 40 uses an image generated from the point light source 10 accommodated in the port 27 of the light collecting cover 20 to capture an image. Display.

The liquid crystal display panel 40 includes a first substrate 42, a second substrate 44, and a liquid crystal layer 46.

The first substrate 42 may include thin film transistors (not shown) arranged in a matrix form and a pixel electrode (not shown) connected to each thin film transistor, and the second substrate 44 may have a color corresponding to the pixel electrode. It may include a common electrode covering the filter (not shown) and the color filter. The liquid crystal layer 46 is interposed between the pixel electrode and the common electrode.

The liquid crystal display 100 shown in FIGS. 1 and 2 may optionally further include an optical member 50. In the present embodiment, the optical member 50 may be interposed between the liquid crystal display panel 40 and the point light source 10. The optical member 50 is coupled to the light collecting cover 20.

The optical member 50 improves the optical distribution of the light generated from the point light source 10. For example, the optical member 50 may include a diffusion member that diffuses the light generated by the point light source 10, a light collecting member that collects the light generated by the point light source 10, and brightness of the light generated by the point light source 10. It may include a dual brightness enhancement film (DBEF) for improving the.

On the other hand, the breakage of the weak brittle liquid crystal display device can be prevented between the light collecting cover 20 and the edge of the liquid crystal display device 100 coupled to the light collecting cover 20 through an elastic member that absorbs shock and vibration. have.

Example  2

3 is a cross-sectional view of a liquid crystal display device according to a second embodiment of the present invention.

Referring to FIG. 3, the liquid crystal display device 100 includes a point light source 12, a light collecting cover 20, an optical lens 30, and a liquid crystal display panel 40. Optionally, the liquid crystal display 100 may further include an optical member 50.

In this embodiment, the point light source 12 provides light to the liquid crystal display panel 40 to be described later. In the present embodiment, the point light source 12 may be a halogen lamp capable of generating high brightness light. In this embodiment, the point light source 12 is disposed to face the liquid crystal display panel 40.

The condensing cover 20 may have a bell shape as a whole. In the present embodiment, the light collecting cover 20 allows the light generated from the point light source 12 to uniformly reach the center of the liquid crystal display panel 40 to be described later as well as the edge of the liquid crystal display panel 40.

The light collecting cover 20 may be made of a metal material having excellent light reflectance and excellent heat dissipation characteristics, for example, aluminum, brass, or the like, generated from the point light source 12. In addition, a light reflection layer 25 may be disposed on an inner side surface of the light collecting cover 20 to improve light reflectance of light generated from the point light source 12.

The condensing cover 20 includes a pot 27 disposed at a vertex portion of the condensing cover 20 to receive the point light source 12. The port 27 has a shape protruding outward from the inside of the light collecting cover 20, and the point light source 12 is accommodated in the port 27.

In the present embodiment, when the screen size of the liquid crystal display panel 40 to be described later is very large, in order to implement the brightness of the image required from the liquid crystal display panel 40, more light must be generated from the point light source 12. do.

In the present exemplary embodiment, at least two point light sources 12 are disposed inside the port 27 of the condensing cover 20 in order to display an image having a specified brightness in the liquid crystal display panel 40 having a very large screen size. Can be. In the present embodiment, the plurality of point light sources 12 may be arranged in a line inside the port 27 or may be arranged in a circle inside the port 27.

The optical lens 30 is coupled to the inside of the condensing cover 20. Specifically, the optical lens 30 is disposed around the port 27 of the light collecting cover 20. The optical lens 30 changes a propagation path of light generated from the plurality of point light sources 12 accommodated in the port 27 of the condensing cover 20.

The optical lens 30 may consist of concave lenses and convex lenses. The light generated from the plurality of point light sources 12 by the optical lens 30 provides light having a uniform optical distribution to the edge of the liquid crystal display panel 40 as well as the center of the liquid crystal display panel 40 to be described later. can do.

In the present embodiment, the liquid crystal display panel 40 can be manufactured for outdoor advertising, and therefore, the liquid crystal display panel 40 can have a very large screen size. The liquid crystal display panel 40 is coupled to the light collecting cover 20, and the liquid crystal display panel 40 uses light generated from the plurality of point light sources 12 accommodated in the port 27 of the light collecting cover 20. To display the image.

The liquid crystal display panel 40 includes a first substrate 42, a second substrate 44, and a liquid crystal layer 46.

The first substrate 42 may include thin film transistors (not shown) arranged in a matrix form and a pixel electrode (not shown) connected to each thin film transistor, and the second substrate 44 may have a color corresponding to the pixel electrode. It may include a common electrode covering the filter (not shown) and the color filter. The liquid crystal layer 46 is interposed between the pixel electrode and the common electrode.

The liquid crystal display 100 shown in FIG. 3 may optionally further include an optical member 50. In the present embodiment, the optical member 50 may be interposed between the liquid crystal display panel 40 and the plurality of point light sources 12. The optical member 50 is coupled to the light collecting cover 20.

The optical member 50 improves the optical distribution of light generated from the plurality of point light sources 12. For example, the optical member 50 may include a diffusion member for diffusing light generated from the plurality of point light sources 12, a light collecting member for condensing light generated from the plurality of point light sources 12, and a plurality of point light sources. And a dual brightness enhancement film (DBEF) for improving the brightness of the light generated at 12.

Example  3

4 is a cross-sectional view illustrating a liquid crystal display device according to a third embodiment of the present invention. 5 is a plan view illustrating the point light source of FIG. 4.

4 and 5, the liquid crystal display device 100 includes a point light source 15, a light collecting cover 20, an optical lens 30, and a liquid crystal display panel 40. Optionally, the liquid crystal display 100 may further include an optical member 50.

In this embodiment, the point light source 15 provides light to the liquid crystal display panel 40 to be described later. In the present embodiment, the point light source 15 may be a light emitting diode (LED) array substrate capable of generating high brightness light. In this embodiment, the point light source 15 is disposed to face the liquid crystal display panel 40.

Specifically, the point light source 15 includes a substrate 14 and light emitting diodes 13. In this embodiment, the substrate 14 may be a printed circuit board that provides power to the light emitting diodes 15. The light emitting diodes 13 mounted on the substrate 14 may be, for example, white light emitting diodes that generate white light. The light emitting diodes 13 may be arranged in a matrix form on the substrate 14.

The condensing cover 20 may have a bell shape as a whole. In the present exemplary embodiment, the light collecting cover 20 may include a substrate 14 and a light emitting diode 13 mounted on the substrate 14. The center part is uniformly reached to the edge of the liquid crystal display panel 40.

The light collecting cover 20 is a metal material having excellent light reflectance and excellent heat dissipation characteristics, for example, from the point light source 15 including the substrate 14 and the light emitting diode 13 mounted on the substrate 14. It may be made of aluminum, brass and the like. In addition, a light reflection layer for improving light reflectance of light generated from the point light source 15 including the substrate 14 and the light emitting diodes 13 mounted on the substrate 14 may be formed on the inner surface of the light collecting cover 20. 25) can be arranged.

The condensing cover 20 may be disposed at a vertex of the condensing cover 20 to receive a point light source 15 including a substrate 14 and a light emitting diode 13 mounted on the substrate 14. ). The port 27 has a shape protruding outward from the inside of the light collecting cover 20, and the inside of the port 27 includes a substrate 14 and a light emitting diode 13 mounted on the substrate 14. The light source 15 is stored.

The optical lens 30 is coupled to the inside of the condensing cover 20. Specifically, the optical lens 30 is disposed around the port 27 of the light collecting cover 20. The optical lens 30 has a path of propagation of light generated from the point light source 15 including the substrate 14 accommodated in the port 27 of the light collecting cover 20 and the light emitting diode 13 mounted on the substrate 14. Change

The optical lens 30 may consist of concave lenses and convex lenses. The light generated from the point light source 15 made of the substrate 14 and the light emitting diode 13 mounted on the substrate 14 by the optical lens 30 is not only the center of the liquid crystal display panel 40 to be described later but also the liquid crystal. Light having a uniform optical distribution may be provided to the edge of the display panel 40.

In the present embodiment, the liquid crystal display panel 40 can be manufactured for outdoor advertising, and therefore, the liquid crystal display panel 40 can have a very large screen size. The liquid crystal display panel 40 is coupled to the light collecting cover 20, and the liquid crystal display panel 40 uses an image generated from the point light source 15 accommodated in the port 27 of the light collecting cover 20 to capture an image. Display.

The liquid crystal display panel 40 includes a first substrate 42, a second substrate 44, and a liquid crystal layer 46.

The first substrate 42 may include thin film transistors (not shown) arranged in a matrix form and a pixel electrode (not shown) connected to each thin film transistor, and the second substrate 44 may have a color corresponding to the pixel electrode. It may include a common electrode covering the filter (not shown) and the color filter. The liquid crystal layer 46 is interposed between the pixel electrode and the common electrode.

The liquid crystal display 100 shown in FIGS. 4 and 5 may further include an optical member 50. In the present embodiment, the optical member 50 may be interposed between the liquid crystal display panel 40 and the point light source 15 made of the substrate 14 and the light emitting diode 13 mounted on the substrate 14. . The optical member 50 is coupled to the light collecting cover 20.

The optical member 50 improves the optical distribution of light generated from the point light source 15 composed of the substrate 14 and the light emitting diodes 13 mounted on the substrate 14. For example, the optical member 50 may include a diffusion member that diffuses the light generated by the point light source 15, a light collecting member that collects the light generated by the point light source 15, and luminance of the light generated by the point light source 15. It may include a dual brightness enhancement film (DBEF) for improving the.

Example  4

6 is a cross-sectional view illustrating a liquid crystal display device according to a fourth embodiment of the present invention. FIG. 7 is a plan view illustrating the point light source of FIG. 6.

6 and 7, the liquid crystal display device 100 includes a point light source 18, a light collecting cover 20, an optical lens 30, and a liquid crystal display panel 40. Optionally, the liquid crystal display 100 may further include an optical member 50.

In this embodiment, the point light source 18 provides light to the liquid crystal display panel 40 to be described later. In the present embodiment, the point light source 18 may be a light emitting diode (LED) array substrate capable of generating white light having high luminance. In this embodiment, the point light source 18 is disposed to face the liquid crystal display panel 40.

Specifically, the point light source 18 includes a substrate 16 and light emitting diodes 17. In the present embodiment, the substrate 16 may be a printed circuit board that provides power to the light emitting diodes 17. The light emitting diodes 17 mounted on the substrate 16 are, for example, a red light emitting diode 17a for generating red light, a green light emitting diode 17b for generating green light, and a blue light emitting diode 17c for generating blue light. May be). The red, green, and blue light generated from the red, blue, and green light emitting diodes 17a, 17b, and 17c, respectively, are mixed to generate white light. The light emitting diodes 17 may be arranged in a matrix form on the substrate 14.

The condensing cover 20 may have a bell shape as a whole. In the present exemplary embodiment, the light collecting cover 20 includes a substrate 16 and a liquid crystal display panel 40 in which light generated from a point light source 18 including light emitting diodes 17 mounted on the substrate 16 will be described later. The center portion of the liquid crystal display panel may uniformly reach the edge of the liquid crystal display panel 40.

The light collecting cover 20 is a metal material having excellent light reflectance and excellent heat dissipation characteristics, for example, from the point light source 18 including the substrate 16 and the light emitting diodes 17 mounted on the substrate 16. , Aluminum, brass and the like. In addition, a light reflection layer for improving the light reflectance of light generated from the point light source 18 made of the substrate 16 and the light emitting diodes 17 mounted on the substrate 16 on the inner surface of the light collecting cover 20. 25 may be disposed.

The condensing cover 20 may include a port configured to be disposed at a vertex portion of the condensing cover 20 to receive a point light source 18 made of a substrate 16 and light emitting diodes 17 mounted on the substrate 16; 27). The port 27 has a shape protruding outward from the inside of the light collecting cover 20, and the inside of the port 27 includes a substrate 16 and light emitting diodes 17 mounted on the substrate 16. The point light source 18 is accommodated.

The optical lens 30 is coupled to the inside of the condensing cover 20. Specifically, the optical lens 30 is disposed around the port 27 of the light collecting cover 20. The optical lens 30 changes the propagation path of the light generated from the point light source 18 accommodated in the port 27 of the condensing cover 20.

The optical lens 30 may consist of concave lenses and convex lenses. The light generated from the point light source 18 made of the substrate 16 and the light emitting diodes 17 mounted on the substrate 16 by the optical lens 30 is not only the center of the liquid crystal display panel 40 which will be described later. Light having a uniform optical distribution may be provided to an edge of the liquid crystal display panel 40.

In the present embodiment, the liquid crystal display panel 40 can be manufactured for outdoor advertising, and therefore, the liquid crystal display panel 40 can have a very large screen size. The liquid crystal display panel 40 is coupled to the light collecting cover 20, and the liquid crystal display panel 40 uses an image generated from the point light source 18 accommodated in the port 27 of the light collecting cover 20 to capture an image. Display.

The liquid crystal display panel 40 includes a first substrate 42, a second substrate 44, and a liquid crystal layer 46.

The first substrate 42 may include thin film transistors (not shown) arranged in a matrix form and a pixel electrode (not shown) connected to each thin film transistor, and the second substrate 44 may have a color corresponding to the pixel electrode. It may include a common electrode covering the filter (not shown) and the color filter. The liquid crystal layer 46 is interposed between the pixel electrode and the common electrode.

The liquid crystal display 100 shown in FIGS. 6 and 7 may optionally further include an optical member 50. In the present embodiment, the optical member 50 may be interposed between the liquid crystal display panel 40 and the point light source 18. The optical member 50 is coupled to the light collecting cover 20.

The optical member 50 improves the optical distribution of the light generated from the point light source 18. For example, the optical member 50 may include a diffusion member for diffusing light generated from the point light source 18, a light collecting member for condensing light generated from the point light source 18, and luminance of light generated from the point light source 18. It may include a dual brightness enhancement film (DBEF) for improving the.

Example  5

8 is a cross-sectional view illustrating a liquid crystal display device according to a fifth embodiment of the present invention.

Referring to FIG. 8, the liquid crystal display device 100 includes a point light source 10, a light collecting cover 20, an optical lens 30, a liquid crystal display panel 40, and a heat dissipation unit 60. Optionally, the liquid crystal display 100 may further include an optical member 50.

In this embodiment, the point light source 10 provides light to the liquid crystal display panel 40 to be described later. In the present embodiment, the point light source 10 may be a halogen lamp capable of generating high brightness light. In this embodiment, the point light source 10 is disposed to face the liquid crystal display panel 40.

The condensing cover 20 may have a bell shape as a whole. In the present embodiment, the light collecting cover 20 allows the light generated from the point light source 10 to uniformly reach the center of the liquid crystal display panel 40 to be described later as well as the edge of the liquid crystal display panel 40.

The condensing cover 20 may be made of a metal material having excellent light reflectance and excellent heat dissipation characteristics, for example, aluminum, brass, and the like, generated from the point light source 10. In addition, a light reflection layer 25 may be disposed on the inner side of the light collecting cover 20 to improve the light reflectance of the light generated from the point light source 10.

The condensing cover 20 includes a pot 27 disposed at a vertex portion of the condensing cover 20 to receive the point light source 10. The port 27 has a shape protruding outward from the inside of the light collecting cover 20, and the point light source 10 is accommodated in the port 27.

The optical lens 30 is coupled to the inside of the condensing cover 20. Specifically, the optical lens 30 is disposed around the port 27 of the light collecting cover 20. The optical lens 30 changes a propagation path of light generated from the point light source 10 accommodated in the port 27 of the condensing cover 20.

The optical lens 30 may consist of concave lenses and convex lenses. The light generated from the point light source 10 by the optical lens 30 may provide light having a uniform optical distribution to the edge of the liquid crystal display panel 40 as well as the center of the liquid crystal display panel 40 to be described later. .

In the present embodiment, the liquid crystal display panel 40 can be manufactured for outdoor advertising, and therefore, the liquid crystal display panel 40 can have a very large screen size. The liquid crystal display panel 40 is coupled to the light collecting cover 20, and the liquid crystal display panel 40 uses an image generated from the point light source 10 accommodated in the port 27 of the light collecting cover 20 to capture an image. Display.

The liquid crystal display panel 40 includes a first substrate 42, a second substrate 44, and a liquid crystal layer 46.

The first substrate 42 may include thin film transistors (not shown) arranged in a matrix form and a pixel electrode (not shown) connected to each thin film transistor, and the second substrate 44 may have a color corresponding to the pixel electrode. It may include a common electrode covering the filter (not shown) and the color filter. The liquid crystal layer 46 is interposed between the pixel electrode and the common electrode.

The liquid crystal display 100 illustrated in FIG. 8 may optionally further include an optical member 50. In the present embodiment, the optical member 50 may be interposed between the liquid crystal display panel 40 and the point light source 10. The optical member 50 is coupled to the light collecting cover 20.

The optical member 50 improves the optical distribution of the light generated from the point light source 10. For example, the optical member 50 may include a diffusion member that diffuses the light generated by the point light source 10, a light collecting member that collects the light generated by the point light source 10, and brightness of the light generated by the point light source 10. It may include a dual brightness enhancement film (DBEF) for improving the.

On the other hand, in order to display a high brightness image from the liquid crystal display panel 40 having a very large screen size, a large amount of light is provided from the point light source 10, and particularly when the point light source 10 is a halogen lamp, Heat is generated. In particular, when the point light source 10 is accommodated in the port 27 of the light collecting cover 20, the point light source 10 or the peripheral members of the point light source 10 are damaged by the high heat generated by the point light source 10. Or may significantly affect the operation of the liquid crystal display panel 40.

In order to quickly remove heat generated from the point light source 10 from the light collecting cover 20, a heat dissipation unit 60 is installed at a place corresponding to the port 27 of the light collecting cover 20.

The heat dissipation unit 60 may be, for example, a heat dissipation pan for forcibly cooling around the port 27 of the light collecting cover 20. Alternatively, the heat dissipation unit 60 may be a heat dissipation fin for forcibly cooling around the port 27 of the light collecting cover 20. Alternatively, the heat dissipation unit 60 may use a heat dissipation fin and a heat dissipation fan in combination.

Example  6

9 is a cross-sectional view of a liquid crystal display device according to a sixth embodiment of the present invention.

9, the liquid crystal display 100 includes a point light source 10, a light collecting cover 20, an optical lens 30, and a liquid crystal display panel 40. Optionally, the liquid crystal display 100 may further include an optical member 50.

In this embodiment, the point light source 10 provides light to the liquid crystal display panel 40 to be described later. In the present embodiment, the point light source 10 may be a halogen lamp capable of generating high brightness light. In this embodiment, the point light source 10 is disposed to face the liquid crystal display panel 40.

The condensing cover 20 may have a bell shape as a whole. In the present embodiment, the light collecting cover 20 allows the light generated from the point light source 10 to uniformly reach the center of the liquid crystal display panel 40 to be described later as well as the edge of the liquid crystal display panel 40.

The condensing cover 20 may be made of a metal material having excellent light reflectance and excellent heat dissipation characteristics, for example, aluminum, brass, and the like, generated from the point light source 10. In addition, a light reflection layer 25 may be disposed on an inner side surface of the light collecting cover 20 to improve light reflectance of light generated from the point light source 10.

The condensing cover 20 includes a pot 27 disposed at a vertex portion of the condensing cover 20 to receive the point light source 10. The port 27 has a shape protruding outward from the inside of the light collecting cover 20, and the point light source 10 is accommodated in the port 27.

The optical lens 30 is coupled to the inside of the condensing cover 20. Specifically, the optical lens 30 is disposed around the port 27 of the light collecting cover 20. The optical lens 30 changes a propagation path of light generated from the point light source 10 accommodated in the port 27 of the condensing cover 20.

The optical lens 30 may consist of concave lenses and convex lenses. The light generated from the point light source 10 by the optical lens 30 may provide light having a uniform optical distribution to the edge of the liquid crystal display panel 40 as well as the center of the liquid crystal display panel 40 to be described later. .

In the present embodiment, the liquid crystal display panels 40 may be manufactured for outdoor advertising, and therefore, each liquid crystal display panel 40 may have a very large screen size. Each liquid crystal display panel 40 is coupled to the light collecting cover 20, and the liquid crystal display panel 40 is an image using light generated from the point light source 10 accommodated in the port 27 of the light collecting cover 20. Is displayed.

In the present exemplary embodiment, the plurality of liquid crystal display panels 43, 45 and 40 included in the liquid crystal display device 100 may be arranged in, for example, a 1 × 1 matrix shape, arranged in a 1 × 2 matrix shape, or 2 ×. It is arranged in various shapes such as 2 matrix shape or 2 × 3 matrix shape.

In this embodiment, each liquid crystal display panel 40 includes a first substrate 42, a second substrate 44, and a liquid crystal layer 46.

The first substrate 42 of each liquid crystal display panel 40 may include thin film transistors (not shown) arranged in a matrix form and a pixel electrode (not shown) connected to each of the thin film transistors, and the second substrate 44. ) May include a color filter (not shown) corresponding to the pixel electrode and a common electrode covering the color filter. The liquid crystal layer 46 is interposed between the pixel electrode and the common electrode.

The plurality of liquid crystal display panels 40 shown in FIG. 9 may optionally further include an optical member 50. In the present embodiment, the optical member 50 may be interposed between the plurality of liquid crystal display panels 40 and the point light source 10 arranged in a matrix form. The optical member 50 is coupled to the light collecting cover 20.

The optical member 50 improves the optical distribution of the light generated from the point light source 10. For example, the optical member 50 may include a diffusion member that diffuses the light generated by the point light source 10, a light collecting member that collects the light generated by the point light source 10, and brightness of the light generated by the point light source 10. It may include a dual brightness enhancement film (DBEF) for improving the.

Multi Screen Liquid Crystal Display

Example  7

10 is a cross-sectional view illustrating a multi-screen liquid crystal display according to a seventh embodiment of the present invention.

Referring to FIG. 10, the liquid crystal display 200 includes point light sources 110, condensing covers 120, optical lenses 130, and liquid crystal display panels 140. Optionally, the liquid crystal display 100 may further include optical members 150.

In the present embodiment, the light collecting covers 122, 124 and 120 are provided in plurality. For example, the light collecting covers 120 may be arranged in various forms such as 1 × 1 matrix, 1 × 2 matrix, 2 × 2 matrix, or 2 × 3 matrix. . In the present embodiment, the openings of the light collecting covers 120 all face the same direction, and the light collecting covers 120 are arranged in parallel.

The plurality of condensing covers 120 may each have a bell shape. In the present embodiment, the light collecting cover 120 serves to guide the light generated from the point light source 110 to be described later to the liquid crystal display panels 140 to be described later.

The plurality of light collecting covers 120 may be made of a metal material having excellent light reflectivity and excellent heat dissipation, for example, aluminum, brass, or the like. In addition, a light reflection layer 125 may be disposed on an inner surface of each light collecting cover 120 to improve light reflectance of light.

Each condensing cover 120 includes a pot 127 disposed at a vertex portion of the condensing cover 120. Each port 127 protrudes outward from the inside of each condensing cover 120, and the point light sources 112, 114; and 110 are accommodated in the port 127, respectively.

Each point light source 110 provides light to the liquid crystal display panels 140 to be described later. In this embodiment, each point light source 110 may be a halogen lamp capable of generating high brightness light. In this embodiment, each point light source 10 is disposed to face the liquid crystal display panel 140.

The optical lenses 132, 134 and 130 are coupled to the inside of each condensing cover 120. In detail, the optical lens 130 is disposed around the port 127 of each condensing cover 120. The optical lens 130 changes the traveling path of the light generated from the point light source 110 accommodated in the port 127 of the condensing cover 120.

The optical lens 130 may be composed of concave lenses and convex lenses. The light generated from each point light source 110 by the optical lens 130 may provide light having a uniform optical distribution to the edge of the liquid crystal display panel 140 as well as the center of the liquid crystal display panel 140 to be described later. Can be.

In the present embodiment, the liquid crystal display panel 140 may be manufactured for outdoor advertising, and thus the liquid crystal display panel 140 may have a very large screen size. The liquid crystal display panel 140 is coupled to each condensing cover 120, and the liquid crystal display panel 140 uses an image generated from the point light source 110 accommodated in the port 127 of the condensing cover 120. Is displayed.

In the present embodiment, one liquid crystal display panel 140 may be coupled to one condensing cover 120. Alternatively, as shown in FIG. 11, the sub liquid crystal display panels denoted by reference numerals 142a and 142b and the sub liquid crystal display panels denoted by reference numerals 144a and 144b may be coupled to the light collecting covers 122, 124 and 120, respectively. have. In this case, the sub liquid crystal display panels may be arranged in various shapes such as, for example, 1 × 1 matrix, 1 × 2 matrix, 2 × 2 matrix, or 2 × 3 matrix. Is placed on.

The liquid crystal display 200 may further include an optical member 152, 154; 150. In the present embodiment, the optical member 150 may be interposed between each liquid crystal display panel 140 and the point light source 110. Each optical member 150 is coupled to the light collecting cover 120.

The optical member 150 improves the optical distribution of the light generated from the point light source 110. For example, the optical member 150 may include a diffusion member that diffuses the light generated by the point light source 110, a light collecting member that collects the light generated by the point light source 110, and brightness of the light generated by the point light source 110. It may include a dual brightness enhancement film (DBEF) for improving the.

On the other hand, in order to display a high brightness image from the liquid crystal display panel 140 having a very large screen size, a large amount of light is provided from the point light source 110, especially when the point light source 110 is a halogen lamp, Heat is generated. In particular, when the point light source 110 is accommodated in the port 127 of the light collecting cover 120, the point light source 110 or the peripheral members of the point light source 110 are damaged by the high heat generated in the point light source 110. Or may significantly affect the operation of the liquid crystal display panel 140.

In order to quickly remove heat generated from the point light source 110 from the condensing cover 120, heat dissipation units 162, 164 and 160 are installed at a portion corresponding to the port 127 of the condensing cover 120.

The heat dissipation unit 160 may be, for example, a heat dissipation pan for forcibly cooling around the port 127 of the light collecting cover 120. Alternatively, the heat dissipation unit 160 may be a heat dissipation fin for forcibly cooling around the port 127 of the light collecting cover 120. Alternatively, the heat dissipation unit 160 may use a heat dissipation fin and a heat dissipation fan in combination.

12 is a block diagram showing a method for driving a multi-screen liquid crystal display according to a seventh embodiment of the present invention.

Referring to FIGS. 10 and 12, in order to drive the liquid crystal display panels 140 of the multi-screen liquid crystal display 200 shown in FIG. 10, first, an image signal provided from an external information processing apparatus (not shown) or the like is provided. The control unit 310 converts an image signal into a driving signal for a liquid crystal display, thereby generating a driving signal for the liquid crystal display. Meanwhile, the controller 310 also generates a light source driving signal for driving the point light source 110 accommodated in the port 127 of each condensing cover 120.

Subsequently, a driving signal for the liquid crystal display device is provided from the controller 310 to the image divider 320, and in the image divider 320, portions designated from the liquid crystal display panels 140 coupled to the condensing covers 120. A driving signal suitable for displaying an image of the camera is provided to each of the image display panels 140. In this case, when the liquid crystal display panels 140 are formed of 3 × 4 as shown in FIG. 12, the image splitter 320 may drive signals suitable for displaying images of the designated portions of the 12 liquid crystal display panels 140. Provides each.

On the other hand, the light source driving signal generated from the control unit 310 is applied to the power control unit 330, from the power control unit 330 associated with the on / off of each of the point light sources 110 accommodated in each condensing cover 120 Generate a control signal.

Subsequently, the power supply unit 340 electrically connected to each of the point light sources 110 based on a control signal applied to the power control unit 330 provides power to each of the point light sources 110 to supply the point light sources 110. The lights are turned on or off, and the light generated from the point light sources 110 is provided to the liquid crystal display panel 140 to generate an image from each of the liquid crystal display panels 140.

As described in detail above, when the display device for outdoor advertising is implemented, an image may be displayed from one liquid crystal display panel or a plurality of liquid crystal display panels by one point light source.

Although the detailed description of the present invention has been described with reference to the embodiments of the present invention, those skilled in the art or those skilled in the art will have the spirit and scope of the present invention as set forth in the claims below. It will be appreciated that various modifications and variations can be made in the present invention without departing from the scope of the art.

Claims (18)

Point light source for generating light; A bell-shaped condensing cover having a concave-shaped pot for receiving the point light source and condensing light generated in the point light source within a designated area; An optical lens coupled to the port portion of the condensing cover to improve an optical distribution of the light; And And a liquid crystal display panel coupled to the opening of the condensing cover to display an image using the light, and a light reflecting layer including a light reflecting material reflecting the light inside the condensing cover. LCD display device. The liquid crystal display device according to claim 1, wherein the point light source is a halogen lamp. The liquid crystal display of claim 1, wherein at least two point light sources are disposed in the port. The liquid crystal display of claim 1, wherein the point light source comprises a plurality of white light emitting diodes. The liquid crystal display of claim 1, wherein the point light source comprises red, blue, and green light emitting diodes implemented in a matrix form. The liquid crystal display device of claim 1, further comprising an optical member interposed between the liquid crystal display panel and the point light source to improve an optical distribution of light incident on the liquid crystal display panel. The liquid crystal display device according to claim 1, wherein a heat dissipation unit for dissipating heat generated from the point light source is disposed around the port. The liquid crystal display of claim 7, wherein the heat dissipation unit is a heat dissipation pan. The liquid crystal display device according to claim 7, wherein the heat dissipation unit is a heat dissipation fin. delete The liquid crystal display of claim 1, wherein the light reflection layer is a metal layer that reflects the light. The liquid crystal display device according to claim 1, wherein the light reflection layer is a white synthetic resin layer that reflects the light. The liquid crystal display device according to claim 1, wherein at least two liquid crystal display panels are arranged in a matrix form. A plurality of condensing covers having a bell shape and each having a concave port and arranged in parallel; A point light source housed in each port to generate light; An optical lens coupled to each port of each light collecting cover to improve an optical distribution of the light; And A liquid crystal display panel coupled to each of the openings of the plurality of light collecting covers, and displaying an image using light passing through the optical lens; And a light reflecting layer including a light reflecting material reflecting the light inside the light collecting covers. 15. The multi-screen liquid crystal display of claim 14, wherein each light collecting cover includes an optical member interposed between the liquid crystal display panel and the optical lens. 15. The multi-screen liquid crystal display of claim 14, wherein one condensing cover includes one liquid crystal display panel. The multi-screen liquid crystal display of claim 14, wherein a plurality of liquid crystal display panels are disposed in each of the light collecting covers in a matrix form. 15. The multi-screen liquid crystal display of claim 14, further comprising a heat dissipation unit connected to each port to dissipate heat generated from the point light source of each port.

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