KR20070041939A - Liquid crystal display module and assembling method thereof - Google Patents

Abstract

The present invention relates to a liquid crystal display module and an assembly method thereof in which a reflective sheet can be installed on a bottom cover without using a double-sided tape.

The liquid crystal display module according to the present invention includes a liquid crystal panel for displaying an image by adjusting light transmittance, and a backlight unit for irradiating light to the liquid crystal panel, wherein the backlight unit includes a plurality of lamps for generating the light; A bottom cover for accommodating the plurality of lamps, a guide part formed to be bent on an inner wall of the bottom cover, a reflective sheet slid to the guide part and installed on sidewalls and bottom surfaces of the bottom cover, And a diffuser plate covering the entire surface.

According to this configuration, the present invention can be installed on the bottom cover without using a double-sided tape by sliding the reflection sheet in the guide portion formed bent in the "L" shape on the bottom cover to the bottom cover. Accordingly, the present invention can reduce the material cost and the number of assembly processes for installing the reflective sheet on the bottom cover, and can greatly improve workability.

Description

Liquid Crystal Display Module And Assembling Method Thereof}

1 is a cross-sectional view schematically showing a liquid crystal display module having a conventional direct backlight unit.

2 is a schematic cross-sectional view of a liquid crystal display module having a direct type backlight unit according to an exemplary embodiment of the present invention.

3 is a cross-sectional view showing a guide portion formed in the bottom cover shown in FIG.

4 is a view illustrating a process of inserting a reflective sheet into a bottom cover in a method of assembling a liquid crystal display module according to an exemplary embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

2, 102: backlight unit 10, 110: bottom cover

11, 111: reflection sheet 12, 112: lamp

14, 114: diffuser plate 16, 116: optical sheet

20, 120: liquid crystal panel 150: guide portion

152: kidney 154: bend

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display module, and more particularly, to a liquid crystal display module and an assembly method thereof in which a reflective sheet can be installed on a bottom cover without using double-sided tape.

In general, a liquid crystal display module includes a liquid crystal panel in which liquid crystal cells are arranged in a matrix between two glass substrates, and a back light unit for irradiating light to the liquid crystal panel. Will be. In addition, optical sheets are arranged in the liquid crystal display module to vertically generate the light traveling from the backlight unit toward the liquid crystal panel.

In addition, the backlight unit may be divided into an edge type and a direct type. The edge type arrange | positions a lamp to the side surface of a light guide plate, and the light from a lamp is irradiated to a liquid crystal panel through a light guide plate. The direct type is provided with a plurality of lamps in the lower portion of the liquid crystal panel, the light from each lamp is irradiated to the liquid crystal panel through the diffusion plate.

1 is a schematic cross-sectional view of a liquid crystal display module having a conventional direct type backlight unit.

Referring to FIG. 1, a conventional liquid crystal display module includes a liquid crystal panel 20 for displaying an image and a direct type backlight unit 2 for irradiating uniform light onto the liquid crystal panel 20.

In the liquid crystal panel 20, liquid crystal cells are arranged in an active matrix form between the upper and lower substrates 22 and 24, and pixel electrodes and a common electrode for applying an electric field to each of the liquid crystal cells are provided. Will be prepared. In general, the pixel electrode is formed for each liquid crystal cell on the lower substrate 24, that is, the thin film transistor substrate, while the common electrode is integrally formed on the entire surface of the upper substrate 22. Each of the pixel electrodes is connected to a thin film transistor used as a switching element. The pixel electrode drives the liquid crystal cell along with the common electrode according to the data signal supplied through the thin film transistor to display an image corresponding to the video signal.

The backlight unit 2 includes a plurality of lamps 12 for generating light, a bottom cover 10 for accommodating the plurality of lamps 12, and a reflective sheet attached to sidewalls and bottom surfaces of the bottom cover 10. 11, a diffusion plate 14 covering the entire surface of the bottom cover 10, and a plurality of optical sheets 16 stacked on the diffusion plate 14 are provided.

Each of the plurality of lamps 12 includes a glass tube, inert gases inside the glass tube, and first and second electrodes provided at both ends of the glass tube. Inert gas is filled in the glass tube, and phosphor is coated on the inner wall of the glass tube.

Each of the plurality of lamps 12, when an alternating voltage from an inverter (not shown) is applied to the first electrode and the second electrode, electrons are emitted from any one of the first electrode and the second electrode to inert gas in the glass tube. The collision with the field increases the amount of electrons exponentially. As the current flows inside the glass tube by the increased electrons, ultraviolet rays are emitted as the inert gas is excited by the electrons. The ultraviolet rays collide with the luminescent phosphor applied to the inner wall of the glass tube to emit visible light.

The bottom cover 10 supports and accommodates the plurality of lamps 12 to prevent light leakage of visible light emitted from each of the plurality of lamps 12.

The reflective sheet 11 is attached to the side walls and the bottom surface of the bottom cover 10 facing the plurality of lamps 12 by a double-sided tape, and diffuses visible light propagating to the side and back surfaces of the plurality of lamps 12. Reflecting toward 14 improves the efficiency of the light generated in the lamps 12.

The diffuser plate 14 propagates the light emitted from the plurality of lamps 12 toward the liquid crystal panel 20 and diffuses the light from the plurality of lamps 12 so as to be incident at a wide range of angles. The diffusion plate 14 is a material in which a light diffusion member is mixed with a transparent polymer and has a flat plate shape having a predetermined thickness.

The plurality of optical sheets 16 increases the efficiency and luminance of light incident from the diffuser plate 14 and irradiates the liquid crystal panel 20. To this end, the plurality of optical sheets 16 includes at least one prism sheet that collects light from the diffusion plate 14 and irradiates the liquid crystal panel 20. In this case, the plurality of optical sheets 16 may further include at least one diffusion sheet.

Such a conventional liquid crystal display module irradiates the diffuser plate 14 with light emitted from the plurality of lamps 10 and diffuses the light reflected by the reflective sheet 11 attached to the bottom cover 10. The plate 14 is irradiated. Accordingly, the liquid crystal display module according to the related art may minimize the loss of light through the reflective sheet 11 to improve the efficiency of light irradiated onto the diffusion plate 14.

However, the conventional liquid crystal display module uses double-sided tape to attach the reflective sheet 11 to the bottom cover 10. Therefore, in the conventional liquid crystal display module, the method of fixing the reflective sheet is complicated by attaching the reflective sheet 11 to the bottom cover 10 through a process such as a double-sided tape attaching process, a protective paper peeling process of the double-sided tape, and a reflective sheet attaching process. There is a problem that the material cost increases due to the problem and the use of double-sided tape.

Accordingly, an object of the present invention is to provide a liquid crystal display module and an assembly method thereof in which a reflective sheet can be installed on a bottom cover without using a double-sided tape.

In order to achieve the above object, the liquid crystal display module according to an embodiment of the present invention has a liquid crystal panel for displaying an image by adjusting the light transmittance, and a backlight unit for irradiating light to the liquid crystal panel, the backlight unit is And a plurality of lamps for generating the light, a bottom cover for accommodating the plurality of lamps, a guide part formed to be bent on an inner wall of the bottom cover, and a sliding part of the guide part on sidewalls and bottom surfaces of the bottom cover. It is characterized in that it comprises a reflective sheet to be installed, and a diffusion plate covering the front of the bottom cover.

The guide portion may be bent in an “L” shape from the inner wall of the bottom cover to allow the reflective sheet to be inserted therein.

The guide part may include an extension part extended from the inner side wall of the bottom cover to be parallel with the bottom surface of the bottom cover, and a bent part bent from the extension part to be parallel to the side wall of the bottom cover.

According to an exemplary embodiment of the present disclosure, a method of preparing a liquid crystal display module includes providing a bottom cover having sidewalls and a bottom surface, and inserting a reflective sheet into a guide part formed to be bent at an inner wall of the bottom cover to insert sidewalls of the bottom cover. And installing the reflective sheet on a bottom surface, accommodating a plurality of lamps in the bottom cover, laminating a diffuser plate and a plurality of optical sheets on a front surface of the bottom cover, and the plurality of optical fibers. And disposing a liquid crystal panel on the sheet.

Other objects and features of the present invention in addition to the above objects will be apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 2 to 4.

2 is a schematic cross-sectional view of a liquid crystal display module having a direct type backlight unit according to an exemplary embodiment of the present invention.

2, a liquid crystal display module according to an exemplary embodiment of the present invention includes a liquid crystal panel 120 for displaying an image and a direct backlight unit 102 for irradiating uniform light onto the liquid crystal panel 120. It is provided.

In the liquid crystal panel 120, liquid crystal cells are arranged in an active matrix between the upper and lower substrates 122 and 124, and pixel electrodes and a common electrode for applying an electric field to each of the liquid crystal cells are provided. Will be prepared. In general, the pixel electrode is formed for each liquid crystal cell on the lower substrate 124, that is, the thin film transistor substrate, while the common electrode is integrally formed on the entire surface of the upper substrate 122. Each of the pixel electrodes is connected to a thin film transistor used as a switching element. The pixel electrode drives the liquid crystal cell along with the common electrode according to the data signal supplied through the thin film transistor to display an image corresponding to the video signal.

The backlight unit 102 has a plurality of lamps 112 for generating light, a bottom cover 110 for accommodating the plurality of lamps 112, and an “L” shape on the inner wall of the bottom cover 110. A guide part 150 formed to be bent, a reflective sheet 111 installed on the side wall and the bottom surface of the bottom cover 110 by sliding in the guide part 150, and a diffusion plate covering the front surface of the bottom cover 110 ( 114 and a plurality of optical sheets 116 stacked on the diffusion plate 114.

Each of the plurality of lamps 112 includes a glass tube, inert gases inside the glass tube, and first and second electrodes provided at both ends of the glass tube. Inert gas is filled in the glass tube, and phosphor is coated on the inner wall of the glass tube.

Each of the plurality of lamps 112, when an alternating voltage from an inverter (not shown) is applied to the first electrode and the second electrode, electrons are emitted from one of the first electrode and the second electrode to inert gas in the glass tube. The collision with the field increases the amount of electrons exponentially. As the current flows inside the glass tube by the increased electrons, ultraviolet rays are emitted as the inert gas is excited by the electrons. The ultraviolet rays collide with the luminescent phosphor applied to the inner wall of the glass tube to emit visible light.

The bottom cover 110 supports and accommodates the plurality of lamps 112 to prevent light leakage of visible light emitted from each of the plurality of lamps 112.

As illustrated in FIG. 3, the guide part 150 may include a bottom cover (from the protrusion 152 and the protrusion 152 protruding from the upper end portions of both inner side walls of the bottom cover 110 to be parallel to the bottom surface of the bottom cover 110). It is formed in the shape of "L" by the bent portion 154 bent parallel to the side wall of 110.

The protrusion 152 extends from the sidewall of the bottom cover 110 to a predetermined gap G so that the end of the reflective sheet 111 can be inserted.

The bent portion 154 is bent from the protrusion 152 to guide the end of the reflective sheet 111 to slide.

As shown in FIG. 4, the reflective sheet 111 is inserted into the guide parts 150 formed at the upper end portions of both inner side walls of the bottom cover 110, and slides to form the bottom cover 110 facing the plurality of lamps 112. It is installed on the side wall and the bottom surface. The reflective sheet 111 improves the efficiency of light generated by the lamps 112 by reflecting visible light traveling toward side and rear surfaces of the plurality of lamps 112 toward the diffuser plate 114.

The diffusion plate 114 propagates the light emitted from the plurality of lamps 112 toward the liquid crystal panel 120, and diffuses the light to be incident at a wide range of angles. The diffusion plate 114 is a material in which a light diffusion member is mixed with a transparent polymer and has a flat plate shape.

The plurality of optical sheets 116 increases the efficiency and luminance of light incident from the diffuser plate 114 and irradiates the liquid crystal panel 120. To this end, the plurality of optical sheets 116 include at least one prism sheet that collects light from the diffusion plate 114 and irradiates the liquid crystal panel 120. In this case, the plurality of optical sheets 116 may further include at least one diffusion sheet.

As described above, the liquid crystal display module and the assembly method thereof according to the embodiment of the present invention form a guide part 150 bent in an “L” shape on the bottom cover 110, and a reflective sheet ( By inserting and sliding 111, the side cover and the bottom surface of the bottom cover 110 can be installed on the bottom cover without using a double-sided tape.

As described above, the liquid crystal display module and the assembly method thereof according to the embodiment of the present invention do not use the double-sided tape by sliding the reflective sheet on the guide part formed by bending the L-shaped shape on the bottom cover. Reflective sheet can be installed on the bottom cover without Accordingly, the present invention can reduce the material cost and the number of assembly processes for installing the reflective sheet on the bottom cover, and can greatly improve workability.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (6)

A liquid crystal panel which displays an image by adjusting light transmittance; It has a backlight unit for irradiating light to the liquid crystal panel, The backlight unit, A plurality of lamps for generating the light, A bottom cover for storing the plurality of lamps, A guide part formed to be bent at an inner wall of the bottom cover; A reflection sheet sliding on the guide part and installed on sidewalls and bottom surfaces of the bottom cover; And a diffusion plate covering an entire surface of the bottom cover. According to claim 1, And the guide part is bent in an “L” shape from an inner wall of the bottom cover to allow the reflective sheet to be inserted therein. The method of claim 2, The guide unit, An extension part extended from an inner side wall of the bottom cover to be parallel to a bottom surface of the bottom cover; And a bent portion bent from the extension portion to be parallel to the sidewall of the bottom cover. Providing a bottom cover having sidewalls and a bottom surface; Inserting the reflective sheet into the guide portion formed to be bent on the inner wall of the bottom cover to install the reflective sheet on the sidewall and bottom of the bottom cover; Storing a plurality of lamps in the bottom cover; Stacking a diffusion plate and a plurality of optical sheets on a front surface of the bottom cover; Disposing a liquid crystal panel on the plurality of optical sheets. The method of claim 4, wherein And the guide part is bent in an “L” shape from an inner wall of the bottom cover to allow the reflective sheet to be inserted therein. The method of claim 5, The guide unit, An extension part extended from an inner side wall of the bottom cover to be parallel to a bottom surface of the bottom cover; And a bent portion bent from the extension portion to be parallel to the sidewall of the bottom cover.

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