KR100561907B1 - tiled liquid crystal display device - Google Patents

Abstract

The present invention relates to a tiled liquid crystal display device, in which a light control film is closely attached to a data display unit of an LCD panel, thereby preventing a boundary mark from appearing in a boundary area between the LCD panels, thereby realizing a seamless product. Can improve.

Description

Tiled liquid crystal display device

1 is a perspective view showing a tiled liquid crystal display device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating II-II of FIG. 1. FIG.

FIG. 3 is a state diagram illustrating an angle of view of a data display unit of a tiled liquid crystal display by expanding III of FIG. 2; FIG.

Figure 4 is an exploded perspective view showing a tiled liquid crystal display device according to another embodiment according to the technology of the present invention.

The present invention relates to a tiled liquid crystal display device, and more particularly, to a tiled liquid crystal display using a light control film to prevent a boundary mark from occurring in a boundary region between LCD panels, thereby enabling seamless. Relates to a device.

In general, the electronic display device is increasing the importance as a means of transmitting visual information and at the same time expanding the scale of the industry in the realization of the information society. The diversification of information represented by the word multimedia makes the necessity of an electronic display device even more clear. At the same time, the demand for an electronic display device is also becoming large, high definition, excellent visibility, and economic efficiency, and low voltage and low power consumption are particularly required in portable information devices.

As one of such electronic display devices, liquid crystal displays (LCDs), which have expanded the application market by thinning, lightening, and low power consumption, are rapidly expanding their demands by color display. As the level is improved, more and more sized high-definition products are required, and facility adoption for establishing mass-production technology of high-definition and large-screen color liquid crystal is in earnest.

However, the large-screen color liquid crystal display device has a limitation in bringing a large screen size due to its characteristics, and the maximum panel size known so far is 22 inches, and theoretically, it is known that it can be up to 40 inches.

As a result, a so-called projection TV has been introduced, in which an optical system is mounted on a small LCD panel to form a large image on a screen.

Even if this development trend is followed, there is a limit to bringing the actual screen size of the liquid crystal display device large. Recently, a tiled liquid crystal display (tiled LCD) in which several LCD modules are arranged and bonded to make a large screen display device becomes practical. It is becoming.

The tiled liquid crystal display device is manufactured by bonding two or more LCD modules together as shown in US Patent Nos. 4,980,775, 5,067,021, 5,068,740, and 5,079,636. A seamless description of the boundary portion of is required.

Here, looking at an example of a tiled liquid crystal display, the LCD module constituting the tiled liquid crystal display device is installed on the upper surface of the backlight assembly and the backlight assembly that generates light, and the LCD panel and the lower portion of the backlight assembly which display an image. The printed circuit board is fixed to a surface and drives an LCD panel, and a heat seal, which is a flexible connector, electrically connecting the edge electrode of the LCD panel to the printed circuit board.

The LCD panel is composed of a TFT substrate, a color filter substrate attached to face the TFT substrate, and a liquid crystal injected between the TFT substrate and the color filter substrate, and an edge electrode generally connected to the heat seal on the side of the LCD panel in contact with each other. Are formed.

In addition, the reflective film is formed to prevent light leakage to the outside along the side of the backlight assembly to increase the light efficiency.

When the data displayed on the data display unit of the LCD panels of the tiled LCD of this example is viewed at a predetermined side position, the vertical light blocking unit and the backlight including the edge electrodes and the heat seals positioned at the boundary regions of the LCD panels are formed. Due to the light blocking phenomenon caused by the horizontal light blocking portion formed by the separation distance between the assemblies and the pixels formed adjacent to the boundary areas of the LCD panels, the luminance is lowered and a predetermined boundary line mark is formed along the boundary areas of the LCD panels. There is a problem.

Accordingly, it is an object of the present invention to prevent the display of boundary lines in the boundary area between LCD panels.

Other objects of the present invention will become more apparent from the following detailed description and the accompanying drawings.

In order to achieve the above object, the present invention is, for example, at least two or more LCD panels that are installed in contact with each other to display data, and are installed in close contact with the front and rear surfaces of the LCD panels to transmit light in a specific direction. For example, the LCD panel includes a backlight assembly that is installed in close contact with the polarizing members installed at the rear of the LCD panels and emits light, and the light path control member is installed in close contact with the surface of the polarizing members installed at the front of the LCD panels. The light irradiated from the display side is guided to block the landmark view appearing along the boundary area of the LCD panels.

At this time, the light path control member is formed between the light guide bars extending between the opposite ends in the longitudinal direction and arranged in parallel at a predetermined interval in the width direction therein is a light control film to guide the light through the light guide bars (Light Control Film; LCF). In this case, the light guide bar may be a non-reflective body.

As another example, the present invention provides at least two LCD panels that are installed in contact with each other to display data, and are installed in close contact with a rear surface of the LCD panel to transmit light in a specific direction, and to emit light to the polarizing members. The light path control member and the light path control member are installed in close contact with the front of the LCD panels for displaying the data, and guide the light emitted from the data display side of the LCD panels to block the landmark portion appearing along the boundary area of the LCD panels. It may be installed in close contact with the surface may include a light field polarizing member for polarizing and diffusing the light guided by the light path control member.

Hereinafter, a tiled liquid crystal display according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 to 3, a tiled liquid crystal display device is formed by side surfaces of at least two LCD modules 10.

The LCD module 10 includes an LCD panel 12 displaying data and a backlight assembly 14 positioned at a rear surface of the LCD panel 12 to generate light.

The backlight assembly 14 includes a support frame 18 including a plurality of lamps 16 for generating light and a transparent member for accommodating and supporting the lamp 16 so that the long axis of the lamp 16 is horizontal with the LCD panel 12. And a diffusion sheet (not shown) positioned between the support frame 18 and the LCD panel 12 to diffuse light.

Fluorescent lamps of low power consumption and high luminance are typically used for the lamp 16, and these lamps 16 are installed in communication with the support frames 18 that are in contact with each other.

In addition, as shown in FIG. 3 to prevent the light of the lamp 16 from leaking to the outside, the reflective film 20 is formed along the side of the support frame 18, and the support frames 18 which are in contact with the side surfaces. A light blocking rubber (not shown) is installed between the support frames 18 to prevent the light of the lamp 16 from leaking in between.

In addition, as illustrated in FIG. 3, a heat seal 22 that transmits a driving signal is bonded to edge electrodes (not shown) formed on the side of the LCD panel 12, so that the backlight assemblies 14 may be bonded. The heat chamber 22 is electrically connected to a printed circuit board (not shown) which is located at the rear of the backlight assembly 14 and drives the LCD panels 12.

Further, according to the present invention, the LCD is provided by guiding the light transmitted from the LCD panels 12 to the data display side of the LCD panels 12 having the upper and lower polarizing plates 24 and 26 attached to the front and rear surfaces, respectively. A light path control member, for example, a light control film (LCF) 28, which blocks the landmark view appearing along the boundary area between the panels 12, is installed in close contact.

As shown in FIG. 3, the light control film 28 has light guide bars 30 extending therebetween and arranged in parallel at regular intervals in the width direction and extending between opposite ends in the longitudinal direction. It consists of a structure which guides light by passing through it.

At this time, the light guide bar 30 is made of a non-reflective material, for example, a light absorbing material to prevent the landmark viewing portion is reflected by the light guide bar (30).

Here, the operation of the tiled liquid crystal display device applying the light control film will be described in more detail.

First, the lamps 16 are driven according to the application of the driving voltage, and the light emitted from the driven lamps 16 passes through the lower polarizing plate 26 through the support frames 18.

At this time, the light passing through the support frames 18 is reflected to the reflective film 20 formed along the side of the support frame 18 and proceeds toward the lower polarizing plate 26, and only the light vibrating in a specific direction is lower lower plate ( 26) and the remaining light is blocked and absorbed.

Light transmitted through the lower polarizing plate 26 is blocked at the black matrix 32 of the LCD panels 12 and passes through pixels made of Algivy (RGB) color dots positioned between the black matrix 32 and then the upper portion. The polarizing plate 24 is transmitted through.

At this time, according to the present invention, the light transmitted through the upper polarizing plate 24 between the light guide bars 30 of the light control film 28 is irradiated to the outside, when viewing the data displayed at a predetermined position, LCD The boundary line mark generated along the boundary area between the panels 12 is not shown.

Here, look at in more detail the operation of the light control film according to the present invention.

Prior to this, when viewing data displayed at a predetermined side position, the reason why the boundary line is displayed along the boundary areas of the LCD panels 12 is as follows.

Referring to FIG. 3, the data displayed on the data display unit of the LCD panels 12 at a predetermined position A on the right side, for example, based on the boundary area between the LCD panels 12 which are in contact with the sides of the LCD panels 12. In the case of, the vertical light blocking portion formed by the heat chamber 22, the edge electrode, etc. is located on the left side of the LCD panels 12 and is adjacent to the boundary areas of the LCD panels 12. By overlapping a predetermined area of the pixels 33 (hereinafter referred to as "first pixel") formed by the light, the vertical area light blocking portion of the light passing through the first pixel 33 in the predetermined area of the overlapping first pixel 33 The luminance decrease caused by the light blocking by the light source causes a difference in luminance from the periphery of the first pixel 33.

When moving from the predetermined position A to the predetermined position B on the right side to view data displayed on the data display unit of the LCD panels 12, the vertical light blocking unit gradually increases the first pixel (which is adjacent to the boundary area of the LCD panels 12). Overlap 33 and the entire area of the first pixel 33 is lowered brightness, the luminance difference with the peripheral portion of the first pixel 33 occurs.

As the first pixel 33 formed adjacent to the boundary regions of the LCD panels 12 and the vertical light blocking portion overlap with each other, the light passing through the first pixel 33 is blocked by the vertical light blocking portion, thereby blocking the boundary region. The luminance of the first pixel 33 of the first pixel 33 is different from that of the periphery of the first pixel 33, so that when the data displayed on the data display unit of the LCD panels 12 is externally viewed from a predetermined side position, the LCD panel as a whole It appears that a boundary line mark is formed along the boundary area of the field 12.

In addition, when viewing data displayed on the data display unit of the LCD panels 12 with respect to the horizontal light blocking portion formed by the spaced area between the support frames 18, the following position change occurs.

Referring to FIG. 3, first, the LCD panels 12 are displayed on the data display unit of the LCD panels 12 at a predetermined position C on the right side, for example, based on the boundary area of the LCD panels 12 in which the LCD panels 12 are in contact with each other. In view of the data, a part of the horizontal light blocking portion formed by the spaced area between the support frames 18 is located on the right side with respect to the boundary area of the LCD panels 12 and is located at the boundary areas of the LCD panels 12. By overlapping a predetermined area of the adjacently formed pixels 34 (hereinafter referred to as "second pixels"), the light passing through the second pixel 34 is blocked by the horizontal axis in the predetermined area of the overlapping second pixel 34. The luminance difference caused by the light blocking caused by the negative causes a luminance difference with the periphery of the second pixel 34.

When moving from the predetermined position C to the predetermined position D on the right side and viewing the data displayed on the data display unit of the LCD panels 12, the horizontal pixel blocking unit gradually increases the second pixel (which is adjacent to the boundary area of the LCD panels 12). Overlap 34 and the entire area of the second pixel 34 is reduced in brightness, the luminance difference with the peripheral portion of the second pixel 34 occurs.

As the second pixel 34 and the horizontal light blocking portion overlap with each other, and the light passing through the second pixel 34 is blocked by the horizontal light blocking portion, the second pixel 34 is surrounded by the peripheral portion of the second pixel 34. When the difference between the luminance and the luminance is generated, when the data displayed on the data display unit of the LCD panels 12 is viewed at a predetermined position from the outside, the boundary lines appear to be formed along the boundary regions of the LCD panels 12 as a whole. .

The boundary line display generated due to this reason does not appear in the data display unit when the data displayed on the data display unit at a predetermined position is applied by applying the light control film according to the present invention.

First, when the light guide bars 30 of the light control film 28 see data displayed on the data display unit of the LCD panels 12 between a predetermined position A and a predetermined position B on the right side, the light guide bars 30 It has a predetermined height so that it can be blocked by.

When the light guide bars 30 having such heights are arranged to be spaced apart from each other by long sides, when the data is viewed between the predetermined position A and the predetermined position B on the right side, the LED panels 12 are formed by the light guide bars 30. ), An area formed by overlapping the first pixel 33 formed adjacent to the boundary region of the photoelectric axis and the vertical light blocking portion is not visible. This means that the boundary mark generated due to the overlap of the first pixel 33 and the light blocking unit is not visible, and means a seamless implementation.

In addition, the distance between the light guide bars 30 is set based on the predetermined position C so that the boundary line display generated when viewing data between the predetermined position C and the predetermined position D on the right side is not displayed.

As the separation distance between the light guides 30 is set based on the predetermined position C, when the data displayed on the data display unit is viewed while moving toward the predetermined position D from the predetermined position C on the right side, the horizontal / vertical axis light blocking unit Boundary marks generated due to overlap of the first and second pixels 33 and 34 are blocked by the light guide bars 30.

When viewing the data displayed on the data display unit at a predetermined position as described above, seamless display is realized because the boundary display is not displayed by the light control film 18 along the boundary regions of the LCD panels 12. The reliability of the is improved.

Meanwhile, looking at another embodiment of the present invention, another embodiment of the present invention further improves the above-mentioned embodiment, and the configuration thereof is as follows. Detailed description of the same parts as those mentioned in the above embodiment will be omitted.

Referring to FIG. 4, the lower polarizing plate 42 is positioned on the light transmitting surface of the backlight assemblies 40, and the LCD panels 44 are positioned on the upper surface of the lower polarizing plate 42.

In addition, according to the present invention, the light control film 46 is located on the upper surface of the LCD panel 44, the light field polarizing member, for example, having a polarization function and a diffusing function on the upper surface of the light control film 46 The wide field of view polarizing plate 48 is located.

As such, when the light control film 46 is positioned on the upper surfaces of the LCD panels 44, when the data displayed on the data display unit of the LCD panels 44 is viewed at a predetermined position, a boundary between the LCD panels 44 is displayed. Boundary marks generated in the area are not displayed by the light control film 46, so that seamless is realized, thereby improving product reliability.

However, in contrast, the invisibility of the boundary line means that the data displayed on the data display unit cannot be seen at a predetermined position, which is solved by the wide field polarizer 48.

As the light passing through the light control film 46 passes through the optical field polarizing plate 48 and diffuses simultaneously, the viewing angle of the tiled liquid crystal display device is improved.

This viewing angle improvement is achieved as the light irradiated in one direction by the light guides of the light guide bars 50 of the light control film 46 is again diffused by the light field polarizing plate 48.

By applying the wide-field polarizing plate to the light control film in this way, even when viewing the data displayed on the data display unit between the predetermined position C and the predetermined position D mentioned in the above embodiment, the boundary line display that appears in the boundary area of the LCD panels is controlled. Wide viewing angle can be secured.

On the other hand, the present invention has been described with respect to the above-mentioned embodiments, the present invention can be variously modified by those skilled in the art, these modified embodiments are to be individually understood from the technical spirit or point of view of the present invention It should be noted that such modified embodiments should fall within the scope of the appended claims of the present invention.

As described above, the present invention has the effect of improving the reliability of the product by implementing the seamless by preventing the display of the boundary line in the boundary area of the LCD panel by closely installing the light control film on the data display unit of the LCD panel.

Claims (4)

At least two LCD panels which are installed in contact with sides and display heat data interposed between heat seals which are vertical light blocking films; Polarizing members installed in close contact with the front and rear surfaces of the LCD panels to transmit light in a specific direction; A backlight assembly installed in close contact with the polarizing members installed on the rear surfaces of the LCD panels to emit light; Light guide bars, which are disposed on a surface of the polarizing members installed on the front of the LCD panels, are arranged in parallel in a width direction in parallel to each other and are arranged in a vertical direction with respect to the polarizing member, and have optical guide bars formed therein. And a light control film guiding the light through the light guide bars. delete delete At least two LCD panels which are installed in contact with sides and display heat data interposed between heat seals which are vertical light blocking films; A polarizing member installed in close contact with a rear surface of the LCD panel to transmit light in a specific direction; A backlight assembly emitting light to the polarizing member; Light guide bars, which are disposed on the surface of the polarizing members installed on the front of the LCD panels, are arranged in parallel in a width direction in parallel to each other in a width direction, and are arranged in the vertical direction with respect to the polarizing member. A light control film guiding the light through guide bars; And And a light field polarizing member installed in close contact with the surface of the light control film to polarize and diffuse light guided by the light control film.

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