KR20060076001A - Lamp assembly, backlight assembly having same and display device having same - Google Patents

Abstract

A lamp assembly, a backlight assembly having the same, and a display device having the same are disclosed. The lamp assembly includes a lamp, a lamp holder and a lamp cover. The lamp has an odd number of bends and includes a lamp body arranged in parallel with each other and electrodes formed at the ends of the lamp body. The lamp holder includes a first lamp holder for fixing the bent portion and a second lamp holder for fixing the ends of the lamp body. The lamp cover fixes the first lamp holder and the second lamp holder and reflects the light generated from the lamp body. The backlight assembly includes a lamp assembly and the display device includes a backlight assembly. Thus, the assembly of the backlight assembly and the display device is improved.

Backlight assembly, lamp assembly, lamp holder, bending, groove, lamp cover

Description

LAMP ASSEMBLY, BACK LIGHT ASSEMBLY HAVING THE LAMP ASSEMBLY AND DISPLAY DEVICE HAVING THE BACK LIGHT ASSEMBLY}

1 is a perspective view of a lamp assembly according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the lamp assembly shown in FIG. 1. FIG.

3 is a partial cross-sectional view of the lamp assembly shown in FIG. 1 taken along the line II ′.

4 is a perspective view of a lamp assembly according to an embodiment of the present invention.

5 is a perspective view of a lamp assembly according to an embodiment of the present invention.

FIG. 6 is an exploded perspective view of the lamp assembly shown in FIG. 5.

7 is a perspective view of a backlight assembly according to an embodiment of the present invention.

FIG. 8 is an exploded perspective view of the backlight assembly shown in FIG. 7.

FIG. 9 is a partial cross-sectional view of the backlight assembly illustrated in FIG. 7 taken along the line II-II ′.

10 is a partial cross-sectional view of a display device according to an exemplary embodiment.

The present invention relates to a lamp assembly, a backlight assembly having the same, and a display device having the same. More particularly, the present invention relates to a lamp assembly having improved assembly property and improved reliability against external impact, a backlight assembly having the same, and a display device having the same.

In general, the liquid crystal has both electrical and optical characteristics that change the transmittance of light according to the intensity of the electric field. Liquid crystal display devices (LCDs) display images by using electro-optical characteristics of liquid crystals (LCs). Since the liquid crystal is a passive element that does not generate light by itself, the liquid crystal display includes a backlight assembly to display an image in a dark place.

The backlight assembly employed in the conventional display device is classified into a direct down type backlight assembly and an edge type backlight assembly according to the arrangement of the light sources. In the edge type backlight assembly, a lamp is disposed on a side of the light guide plate to provide light to the display panel. The edge type backlight assembly can further reduce the volume and weight of the backlight assembly compared to the direct backlight assembly.

Recently, as the luminance required for the display device increases, the number of lamps employed in the edge type backlight assembly also increases. The edge type backlight assembly generally includes a straight lamp. The straight ramp may include electrodes formed at a first end and at a second end opposite the first end, respectively.                         

When the edge-lit backlight assembly includes a plurality of straight lamps, it is difficult to process the power supply wiring connected to the electrodes of the first and second ends of the lamp, and the power supply wiring soldered to the electrode is often disconnected at the soldering site. Has the problem.

Accordingly, it is an object of the present invention to substantially eliminate one or more problems and limitations of the prior art.

It is a first object of the present invention to provide a lamp assembly with improved reliability and assembly against impact from the outside.

It is a second object of the present invention to provide a backlight assembly including the lamp assembly.

It is a third object of the present invention to provide a display device including the backlight assembly.

A lamp assembly according to one feature for realizing a first object of the invention comprises a lamp, a lamp holder and a lamp cover. The lamp has an odd number of bends and includes a lamp body arranged in parallel with each other and electrodes formed at the ends of the lamp body. The lamp holder includes a first lamp holder for fixing the bent portion and a second lamp holder for fixing the ends of the lamp body. The lamp cover fixes the first lamp holder and the second lamp holder and reflects the light generated from the lamp body. Optionally, the first lamp holder further comprises an engaging projection for engaging the bent portion.                     

A backlight assembly for realizing a second object of the present invention includes a lamp assembly, a light guide plate, at least one optical member, and a storage container. The lamp assembly includes a lamp, a lamp holder and a lamp cover. The lamp has an odd number of bends and includes a lamp body arranged in parallel with each other and electrodes formed at the ends of the lamp body. The lamp holder includes a first lamp holder for fixing the bent portion and a second lamp holder for fixing the ends of the lamp body. The lamp cover fixes the first lamp holder and the second lamp holder and reflects the light generated from the lamp body. The light guide plate is disposed to face the lamp cover. The optical member is disposed in association with the light guide plate and improves optical characteristics of light generated from the lamp. The storage container houses the lamp assembly, the light guide plate and the optical member.

A display device for realizing the third object of the present invention includes a lamp assembly, a light guide plate, an optical member, a display panel, and a storage container. The display panel is disposed on the optical member and accommodated in the storage container.

According to the lamp assembly, the backlight assembly having the same, and the display device having the same, the assembly of the backlight assembly and the display apparatus is improved.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Lamp assembly

1 is a perspective view of a lamp assembly according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the lamp assembly shown in FIG. 1. FIG.                     

1 and 2, the lamp assembly 100 includes a lamp cover 170, a lamp holder 160, and a lamp 120.

The lamp cover 170 includes first to third surfaces. The first face is disposed facing the second face. The third face connects one side edge of the first face and one side edge of the second face. As a result, a predetermined storage space is formed between the first and second surfaces. Openings 171 and 173 may be formed in the vicinity of one longitudinal edge of the second surface and the other edges facing the one edge, respectively. The lamp cover 170 accommodates the lamp 120 to be described later in the storage space and reflects the light generated by the lamp 120. An inner side surface of the lamp cover 170 may be coated with a reflective material having excellent reflection efficiency.

3 is a partial cross-sectional view of the lamp assembly shown in FIG. 1 taken along the line II ′.

2 and 3, the lamp holder 160 includes a first lamp holder 130 and a second lamp holder 150.

The first lamp holder 130 may have, for example, first to fourth surfaces. First to third surfaces of the first lamp holder 130 may be disposed to face the first to third surfaces of the lamp cover 170, respectively. The fourth surface of the first lamp holder 130 is connected to the first to third surfaces of the first lamp holder 130, respectively. A fixing protrusion 131 may be formed on the second surface of the first lamp holder 130. As the fixing protrusion 131 is inserted into the opening 171 formed on the second surface of the lamp cover 170, the first lamp holder 130 is fixed to the lamp cover 170. A coupling groove 133 may be formed in the fourth surface of the first lamp holder 130.                     

The second lamp holder 150 has, for example, first to fourth surfaces. The first to third surfaces of the second lamp holder 150 are disposed to face the first to third surfaces of the lamp cover 170, respectively. The fourth surface of the second lamp holder 150 is connected to the first to third surfaces of the second lamp holder 150, respectively. The fixing protrusion 151 is formed on the second surface of the second lamp holder 150. The fixing protrusion 151 is inserted into the opening 173 formed on the second surface of the lamp cover 170 so that the second lamp holder 150 is fixed to the lamp cover 170. Fixing grooves 153 and 155 may be formed in the fourth surface of the second lamp holder 150. The fixing grooves 153 and 155 may be through holes, for example. The positions where the fixing protrusions 131 and 151 are formed in the first lamp holder 130 and the second lamp holder 150 may be changed in various ways according to the surface in contact with the lamp cover 170.

The lamp 120 includes a lamp body 110 and electrodes 113 and 115. The lamp body 110 has an odd number of bent portions 111. The electrodes 113 and 115 are formed at the first end of the lamp body 110 and at the second end facing the first end, respectively. Preferably, the lamp body 110 having the bent portion 111 is arranged parallel to each other. In the present embodiment, the bent lamp 120 has, for example, a U shape, and one bent portion 111 is formed in the lamp 120 having a U shape. The bent part 111 is inserted into the coupling groove 133 formed on the fourth surface of the first lamp holder 130. At this time, it is preferable that the coupling groove 133 has a size not to be separated after the bent portion 111 is fitted.

The first end of the lamp 120 and the second end facing the first end are inserted into the fixing grooves 153 and 155 of the second lamp holder 150, respectively. Accordingly, the electrodes 113 and 115 of the lamp 120 may be exposed through the fixing grooves 153 and 155. The power supply wires 190 are electrically connected to the electrodes 113 and 115 of the lamp 120. For example, the power supply wiring 190 is electrically connected to each of the electrodes 113 and 115 by soldering.

4 is a perspective view of a lamp assembly according to an embodiment of the present invention.

Referring to FIG. 4, the lamp assembly 300 according to the present embodiment includes a lamp cover 370, a lamp holder 360, and a lamp 320. The lamp assembly 300 according to the present embodiment is substantially the same as the lamp assembly 100 illustrated in FIG. 1 except for the shape of the first lamp holder 330.

The lamp cover 370 has first to third surfaces. The first and second surfaces of the lamp cover 370 are disposed to face each other. The third surface of the lamp cover 370 connects one side edge of the first surface and one side edge of the second surface.

The lamp holder 360 includes a first lamp holder 330 and a second lamp holder 150. The first lamp holder 330 has first to fourth surfaces. First to third surfaces of the first lamp holder 330 are disposed to face the first to third surfaces of the lamp cover 370, respectively. The fourth surface of the first lamp holder 330 is connected to the first to third surfaces of the first lamp holder 330, respectively. Fixing protrusions (not shown) may be formed on at least one of the first to third surfaces of the first lamp holder 330. The lamp cover 370 may have an opening (not shown) that is engaged with the fixing protrusion of the first lamp holder 330 in response to the fixing protrusion formed on the first lamp holder 330. A coupling protrusion 335 may be formed on the fourth surface of the first lamp holder 330. Coupling protrusion 335 may have a ring shape, for example.

The second lamp holder 350 has first to fourth surfaces. First to third surfaces of the second lamp holder 350 may be disposed to face the first to third surfaces of the lamp cover 370, respectively. The fourth surface of the second lamp holder 350 is connected to the first to third surfaces of the second lamp holder 350, respectively. The fourth surface of the second lamp holder 350 is disposed to face the fourth surface of the first lamp holder 330. Fixing grooves 353 and 355 may be formed in the fourth surface of the second lamp holder 350. The fixing grooves 353 and 355 may be, for example, the through holes 353 and 355.

The bent portion 311 of the lamp 320 is coupled to the coupling protrusion 335 formed on the fourth surface of the first lamp holder 330. The first end of the lamp and the second end facing the first end are inserted into fixing grooves 353 and 355 formed in the fourth surface of the second lamp holder 350, respectively. Accordingly, the lamp 320 is firmly fixed at the designated position on the lamp cover 370. In order to prevent the light generated from the lamp 320 from being blocked, the coupling protrusion 335 may be formed of a transparent material. In addition, the coupling protrusion 335 preferably has sufficient elasticity to prevent damage to the lamp 320.

5 is a perspective view of a lamp assembly according to an embodiment of the present invention. FIG. 6 is an exploded perspective view of the lamp assembly shown in FIG. 5.

5 and 6, the lamp assembly 500 according to the present embodiment includes a lamp cover 570, a lamp holder 560, and a lamp 520. The lamp assembly 500 according to the present embodiment is substantially the same as the lamp assembly 100 illustrated in FIG. 1 except for the shape of the lamp 520 and the shape of the lamp cover 570.                     

The lamp cover 570 includes first to third surfaces. The first side and the second side are disposed to face each other. The third face connects one side edge of the first face and one side edge of the second face. The area enclosed by the first to third surfaces forms a storage space of the lamp. Openings 571 and 573 may be formed at one side edge in the longitudinal direction of the second surface of the lamp cover 570 and the other side edges facing the one edge. A coupling protrusion 575 may be formed on the third surface of the lamp cover 570.

The lamp 520 includes a lamp body 510 and electrodes 517 and 519. The lamp body 510 has an odd number of bends 511, 513, 515. Electrodes 517 and 519 are formed at the first end of the lamp body 510 and at the second end facing the first end, respectively. Preferably, the lamp body 510 having the bent portions 511, 513, 515 are arranged parallel to each other. In the present embodiment, the bent lamp 520 has, for example, a W shape, and the lamp 520 having a W shape has first to third bent portions 511, 513, and 515. The first and second bent portions 511 and 513 face each other, and the third bent portion 515 is disposed between the first and second ends of the lamp 520.

The first and second bent portions 511 and 513 are inserted into the coupling grooves 533 formed on the fourth surface of the first lamp holder 530. The third bent portion 515 of the lamp 520 is coupled to the engaging projection 575 formed on the third surface of the lamp cover 570. The first end and the second end facing the first end of the lamp 520 are inserted into fixing grooves 553 and 555 formed in the fourth surface of the second lamp holder 550, respectively. Accordingly, the electrodes 513 and 515 of the lamp 520 may be exposed through the fixing grooves 553 and 555. Alternatively, the coupling protrusion 575 formed on the third surface of the lamp cover 570 is deleted, and the third bent portion 515 of the lamp 520 is inserted into the fourth surface of the second lamp holder 550. Separate grooves may be formed.

Backlight assembly

7 is a perspective view of a backlight assembly according to an embodiment of the present invention. FIG. 8 is an exploded perspective view of the backlight assembly shown in FIG. 7.

7 and 8, the backlight assembly 700 according to the present invention includes a lamp assembly 100, a light guide plate 620, at least one optical member 670, and a storage container 750. In this embodiment, the lamp assembly 100 is substantially the same as the lamp assembly 100 shown in FIG.

The light guide plate 620 emits light by changing a path of light incident from the lamp assembly 100 to improve luminance distribution. One side of the light guide plate 620 is disposed to face the lamp assembly 100. In the present embodiment, the light guide plate 620 may have a wedge shape in which the thickness of the light guide plate 620 becomes smaller as it moves from one side facing the lamp assembly 100 to the other side opposite to the one side. . Alternatively, when the backlight assembly 700 adopts a light guide plate having a rectangular parallelepiped shape, the lamp assembly 100 is preferably disposed on two mutually opposite sides of the light guide plate for brightness and uniformity of brightness.

The optical member 670 receives the light provided from the lamp assembly 100 to improve optical characteristics of the light, for example, brightness and brightness uniformity. The optical member 670 may include a diffusion sheet 630 and light collection sheets 640 and 650 disposed on the light guide plate 620. For example, the diffusion sheet 630 diffuses the light emitted from the light guide plate 620 to further improve the luminance uniformity of the light. The light collecting sheets 640 and 650 improve front brightness of the light emitted from the diffusion sheet 630. The backlight assembly 700 according to the present exemplary embodiment may include a reflective sheet 680 disposed under the light guide plate 620 to reflect light leaking through the lower surface of the light guide plate 620 to be incident to the inside of the light guide plate 620. It may further include.

The storage container 750 accommodates the lamp assembly 100, the light guide plate 620, and the optical member 670. The storage container 750 includes a bottom surface 751, a first side wall 753, and a second side wall 755. The bottom surface 751 is opened to reduce the weight of the storage container 750 except for the edge. The first and second sidewalls 753, 755 are disposed at the edge of the bottom surface 751. The first sidewall 753 and the second sidewall 755 are interconnected to be approximately vertical. A groove 757 may be formed at an area adjacent to the edge of the second sidewall 755 that meets the first sidewall 753 to facilitate assembly of the lamp assembly 100.

FIG. 9 is a partial cross-sectional view of the backlight assembly illustrated in FIG. 7 taken along the line II-II ′.

For example, first, the electrodes 113 and 115 of the lamp 120 are inserted into the fixing grooves 153 and 155 of the second lamp holder 150. Subsequently, the second lamp holder 150 having the lamp 120 fixed therein is fitted into the lamp cover 170 from one end in the longitudinal direction of the lamp cover 170. Next, the first lamp holder 130 is assembled into the lamp cover 170 from the other end facing the one end of the lamp cover 170. At this time, the bent part 111 of the lamp 120 is inserted into and fixed to the coupling groove 133 of the first lamp holder 130. Subsequently, the lamp assembly 100 is disposed inside the first side wall 753 of the storage container 750. In this case, the lamp assembly 100 may be stored in the storage container 750 in a direction perpendicular to the bottom surface 751 of the storage container 750. Alternatively, the lamp assembly 100 may be stored in the storage container 750 in a sliding manner through the opening 757 formed in the second sidewall 755 of the storage container 750. The light guide plate 620 is disposed on the bottom surface 751 of the storage container 750 so that one side thereof faces the lamp assembly 100. An optical member 670 is disposed on the light guide plate 620 to complete the assembly of the backlight assembly 700.

Display device

10 is a partial cross-sectional view of a display device according to an exemplary embodiment.

Referring to FIG. 10, the display device according to the present exemplary embodiment includes a lamp assembly 100, a light guide plate 620, an optical member 670, a display panel 800, and a storage container 750. The other components except for the display panel 800 are substantially the same as the lamp assembly 100, the light guide plate 620, the optical member 670, and the storage container 750 illustrated in FIG. 8, and the same reference numerals are used.

The display panel 800 displays an image based on the light emitted from the optical member 670. The display panel 800 is disposed on the optical member 670. The display panel 800 may be disposed at, for example, a stepped portion formed in sidewalls including the first sidewall 753 and the second sidewall 755 of the storage container 750. The display panel 800 includes a first substrate 810, a second substrate 850, and a liquid crystal layer (not shown).

The first substrate 810 is a transparent glass substrate in which a thin film transistor (not shown), which is a switching element, is formed in a matrix form. The pixel electrode made of a transparent conductive material is disposed on the first substrate 810.

The second substrate 850 is disposed to face the first substrate 810 at a predetermined interval. The second substrate 850 is a substrate in which red, green, and blue pixels, which are color pixels expressed in a predetermined color when light passes, are formed by a thin film process. A common electrode made of a transparent conductive material is formed on the second substrate 850 to correspond to the pixel electrode formed on the first substrate 810.

When an electric field is formed between the first substrate 810 and the second substrate 850, the arrangement of the liquid crystal layer interposed between the first substrate 810 and the second substrate 850 is changed, and the arrangement of the liquid crystals is increased. In accordance with the change, the transmittance of light supplied from the lamp assembly 100 is changed to obtain an image of a desired gray scale.

The display device 900 according to the present exemplary embodiment may further include a bottom chassis 930 and a top chassis 970. The bottom chassis 930 covers portions of the back and side surfaces of the storage container 750 to protect the components stored in the storage container 750. The top chassis 970 is fastened to face the bottom chassis 930. In this case, the top chassis 930 presses an edge of the display panel 800 to fix the display panel 800 on the storage container 750 and expose the effective display area of the display panel 800.

 As described above in detail, according to the lamp assembly according to the present invention, the first lamp holder and the second lamp holder are firmly fixed to the lamp cover. Further, the bent portion of the lamp is firmly fixed by being inserted into or coupled to the engaging groove of the first lamp holder, the first end on which the electrodes of the lamp are formed and the second end facing the first end are second lamp holders. It is inserted into the fixing groove of and is firmly fixed. Therefore, even if an impact or vibration is applied to the lamp assembly from the outside, the frequency of the lamp breaking or the lamp being separated from the designated position is greatly reduced. In addition, since the lamp holder does not block the effective light emitting area of the lamp, the utilization efficiency of the light generated from the lamp is increased.

On the other hand, according to the backlight assembly according to the present invention, as in the case of the straight lamp, a separate measure for returning and fixing the power supply wiring from the electrode formed at one end toward the electrode formed at the other end opposite to the one end May be omitted. Thus, the frequency at which the power supply wiring soldered to the electrodes is disconnected at the soldering site is greatly reduced.

In addition, according to the display device of the present invention, the frequency of disconnection at the connection portion between the lamp and the power supply wiring is greatly reduced, thereby improving the reliability of the display device.

In the detailed description of the present invention described above with reference to the preferred embodiments of the present invention, those skilled in the art or those skilled in the art having ordinary skill in the art will be described in the claims to be described later It will be understood that various modifications and variations can be made in the present invention without departing from the scope of the present invention.

Claims (17)

A lamp having an odd number of bent portions, a lamp body disposed in parallel with each other, and electrodes formed at ends of the lamp body; A lamp holder including a first lamp holder for fixing the bent portion and a second lamp holder for fixing the ends; And And a lamp cover fixing the first lamp holder and the second lamp holder and reflecting light generated from the lamp body. The lamp assembly of claim 1, wherein the first lamp holder is provided with a coupling groove coupled to the bent portion. The lamp assembly of claim 1, wherein the first lamp holder includes a coupling protrusion that engages with the bent portion. The lamp assembly of claim 1, wherein the second lamp holder has a fixing groove to which the ends are fixed. The lamp assembly of claim 1, wherein fixing protrusions are formed on the first and second lamp holders in contact with the lamp cover, and openings corresponding to the fixing protrusions are formed on the lamp cover. The lamp assembly of claim 1, wherein the lamp has a U shape. The lamp assembly of claim 1, wherein the lamp has a W shape. A lamp body having an odd number of bent portions and arranged in parallel to each other, a lamp having electrodes formed at ends of the lamp body, a first lamp holder for fixing the bent portion, a second lamp holder for fixing the ends and the first lamp A lamp assembly fixing a holder to the second lamp holder and including a lamp cover reflecting light generated from the lamp body; A light guide plate facing the lamp cover; At least one optical member disposed in association with the light guide plate to improve optical characteristics of the light; And And a storage container accommodating the lamp assembly, the light guide plate, and the optical member. The backlight assembly of claim 8, wherein the first lamp holder includes a coupling protrusion that engages with the bent portion. The backlight assembly of claim 8, wherein the first lamp holder is provided with a coupling groove coupled to the bent portion. The backlight assembly of claim 8, wherein the second lamp holder has a fixing groove to which the ends are fixed. The backlight assembly of claim 8, wherein fixing protrusions are formed on the first and second lamp holders in contact with the lamp cover, and openings corresponding to the fixing protrusions are formed on the lamp cover. A lamp body having an odd number of bent portions and arranged in parallel to each other, a lamp having electrodes formed at ends of the lamp body, a first lamp holder for fixing the bent portion, a second lamp holder for fixing the ends and the first lamp A lamp assembly fixing a holder to the second lamp holder and including a lamp cover reflecting light generated from the lamp body; A light guide plate facing the lamp cover; At least one optical member disposed in association with the light guide plate to improve optical characteristics of the light; A display panel disposed on the optical member and configured to display an image based on the light; And And a storage container accommodating the lamp assembly, the light guide plate, the optical member, and the display panel. The display device of claim 13, wherein the first lamp holder is provided with a coupling groove coupled to the bent portion. The display device of claim 13, wherein the first lamp holder comprises a coupling protrusion coupled to the bent portion. The display device of claim 13, wherein the second lamp holder is provided with a fixing groove in which the ends are fixed. The display device of claim 13, wherein a fixing protrusion is formed in the first and second lamp holders that contact the lamp cover, and an opening corresponding to the fixing protrusion is formed in the lamp cover.

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