KR101201303B1 - Edge type Backlight Unit - Google Patents

Abstract

The present invention relates to an edge type backlight unit, which is capable of omitting the lamp bottom by dividing the cover bottom, and bending the edge of the cover bottom to engage with the lamp assembly, wherein the edge type backlight unit of the present invention includes a first lamp. And a second lamp, the first lamp and the second lamp, respectively disposed on one side thereof, and formed on an upper portion of the first cover bottom and the second cover bottom and the first cover bottom and the second cover bottom which are in contact with each other. And a first reflecting plate and a second reflecting plate formed to surround the first lamp and the second lamp together with the first cover bottom and the second cover bottom, respectively.

Back Light, Cover Bottom, Lamp Housing, Reflector, Mold, ST (Standard Time), Edge Type, Lamp Holder

Description

Edge type Backlight Unit

1 is an exploded perspective view showing a conventional edge type backlight unit

Figure 2 is a perspective view of the edge type backlight unit of the present invention

3 is a cross-sectional view showing the connection relationship between the first and second cover bottoms of the edge type backlight unit according to the first embodiment of the present invention;

4 is a cross-sectional view illustrating a connection relationship between first and second cover bottoms of an edge type backlight unit according to a second embodiment of the present invention;

5 is a cross-sectional view illustrating a connection relationship between first and second cover bottoms of an edge type backlight unit according to a third embodiment of the present invention;

6 is a cross-sectional view showing a connection relationship between the cover bottom and the lamp housing of the edge type backlight unit of the present invention;

Description of the Related Art [0002]

100: first cover bottom 101: bending portion of the first cover bottom

110: first cover bottom 111: bending portion of the second cover bottom

111a: upper horizontal plane 111b: vertical plane

120a: first lamp 120b: second lamp

130: screw 140a: first reflector

140b: second reflector 150: connection pattern

160: lamp holder 161: projection

162: One end of the lamp

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a liquid crystal display, and in particular, divides a cover bottom into two parts and bends the edge of the cover bottom to engage the lamp assembly, thereby omitting a lamp housing. This relates to a possible backlight unit.

CRT (Cathode Ray Tube), which is one of the display devices that are generally used, is mainly used for monitors such as TVs, measuring devices, information terminal devices, etc., but the miniaturization of electronic products due to CRT's own weight and size It was unable to actively respond to the demand for weight reduction.

Therefore, in the trend of miniaturization and light weight of various electronic products, CRT has a certain limit in weight and size, and is expected to replace the liquid crystal display (LCD: liquid crystal display) and gas discharge using electro-optic effects. Plasma Display Panel (PDP) and Electro Luminescence Display (ELD) using the electroluminescent effect, and the like, among them, research on the liquid crystal display is being actively conducted.

In order to replace the CRT, a liquid crystal display device having advantages such as small size, light weight, and low power consumption has recently been developed to be able to perform a sufficient role as a flat panel display device, and not only a monitor of a laptop computer but also a monitor of a desktop computer. And the demand for the liquid crystal display device has been continuously used in the large information display device and the like.

The liquid crystal display may be classified into a liquid crystal panel for displaying an image and a driving unit for applying a driving signal to the liquid crystal panel. The liquid crystal panel may include first and second glass substrates bonded to each other with a predetermined space, and It consists of the liquid crystal layer injected between the 1st, 2nd glass substrate.

The first glass substrate (TFT array substrate) may include a plurality of gate lines arranged in one direction at a predetermined interval, a plurality of data lines arranged at regular intervals in a direction perpendicular to the gate lines, A plurality of pixel electrodes formed in a matrix form in each pixel region defined by crossing a gate line and a data line, and a plurality of thin films which are switched by signals of the gate line to transfer the signal of the data line to each pixel electrode Transistors are formed.

The second glass substrate (color filter substrate) includes a black matrix layer for blocking light in portions other than the pixel region, an R, G and B color filter layer for expressing color colors, and a common electrode for implementing an image. Is formed.

The first and second glass substrates are bonded by a seal material having a predetermined space by a spacer and having a liquid crystal injection hole, so that the liquid crystal is injected between the two substrates.

On the other hand, since most of the liquid crystal display devices are light-receiving elements that display an image by adjusting the amount of light source coming from the outside, a separate light source, that is, a back light, for irradiating light to the liquid crystal panel is necessary. According to the position where the lamp unit is installed, it is divided into an edge method and a direct method.

Hereinafter, a conventional edge type backlight unit will be described with reference to the accompanying drawings.

1 is an exploded perspective view showing a conventional edge type backlight unit.

As shown in FIG. 1, a conventional edge type backlight unit includes a cover bottom 10 having a horizontal plane and a vertical plane perpendicular to the four sides of the horizontal plane, and a vertical plane parallel to each other of the cover bottom 10. First and second lamp housings 12a and 12b formed in contact with and having lamps 11 emitting light therein, respectively; and the first and second lamp housings 12a. 12b) a horizontal surface of the cover bottom 10 between the lamp holder 16 which protects the electrodes at one end and the other end of the lamp and the first and second lamp housings 12a and 12b. And a light guide plate (not shown) disposed on the reflective plate 13.

Here, a hole 15 is formed in a portion of the cover bottom 10 adjacent to the first and second lamp housings 11a and 11b so that the first and second lamp housings 11a, Fasten the screws 14 to the cover bottom 10 at the bottom of 11b). The screw is fastened to one end and the other end of each of the first and second lamp housings 11a and 11b.

In addition, a diffusion plate (not shown) for uniformly diffusing the light emitted from the light guide plate and an upper portion of the light guide plate are disposed on the diffuser plate to collect light diffused from the diffusion plate and transfer the light to the liquid crystal panel (not shown). A prism sheet (not shown) and a protective sheet (not shown) positioned above the prism sheet to protect the prism sheet are further formed.

In addition, the cover bottom 10 includes a main support 18 for receiving and fixing the first and second lamp housings 12a and 12b, the light guide plate, the diffusion plate, the prism sheet, the protective sheet, and the liquid crystal panel. ) Is formed at the edge of the more. The cover bottom 10 and the main support may be fastened due to a separate screw other than the screw 14 shown.

An optical sheet (not shown) surrounding the first and second lamp housings 12a and 12b and having a separate support main (not shown) formed at an edge of the cover bottom 10 to form a lower portion of the light guide plate. ) And the liquid crystal panel.

As such, the edge method in which the lamp assembly unit including the lamp is installed on the side of the light guide plate 13 is mainly a relatively small liquid crystal display device such as a monitor of a laptop computer and a desktop computer. It is applied to, the light uniformity is good, the durability life is long, it is advantageous for the thinning of the liquid crystal display device.

However, the above conventional backlight unit has the following problems.

First, among the conventional backlight units, the lamp assembly is provided on both sides of the cover bottom. Such a lamp assembly comprises a lamp, a lamp housing wrapped around the lamp to protect the lamp and a lamp holder for protecting and fixing at one end and the other end of the electrode of the lamp. In order to fix the lamp assembly to the upper and lower portions of the cover bottom, the cover bottom is provided with a hole through which the screw must be fastened from the lamp housing to the cover bottom side. In this case, in the mold process of the cover bottom or the lamp housing, since the space in which the screw is inserted is further formed, the mold time is further required. In addition, the assembly process of the backlight unit takes time to fasten the lamp housing and the cover bottom, so that a whole standard time is required to manufacture the backlight unit.

Second, since the lamp housing is formed above and below the cover bottom, and a screw or the like is necessary for fastening the lamp housing and the cover bottom, the number of parts increases and the material cost increases.

Third, as described above, an increase in working time and an increase in material cost ultimately lower productivity.

The present invention has been made in order to solve the above problems, it is divided into a cover bottom, and when the edge of the cover bottom is to be coupled to the lamp housing to provide an edge type backlight unit that can be omitted of the lamp housing, There is a purpose.

Edge type back light unit of the present invention for achieving the above object is the first lamp and the second lamp, and the first cover bottom and the first lamp and the second lamp is disposed on one side and the other side is in contact with each other and A first reflecting plate formed on the second cover bottom and on each of the first cover bottom and the second cover bottom, and formed to surround the first lamp and the second lamp together with the first cover bottom and the second cover bottom, respectively. And a second reflector.

The first and second cover bottoms respectively include a lower horizontal plane, a vertical plane extending from the lower horizontal plane to cover one side of the lamp, and an upper horizontal plane extending from the vertical plane to cover the top of the lamp.

A light guide plate is further disposed on the first reflecting plate and the second reflecting plate between the first lamp and the second lamp.

The first cover bottom and the second cover bottom partially overlap each other and are fastened with screws.

The portions where the first cover bottom and the second cover bottom contact each other are engaged with each other.

Lamp holders are further formed at one end and the other end of each of the first and second lamps.

The lamp holder is further provided with a projection.

A hole is formed in the cover bottom portion of the protrusion of the lamp holder.

When the first and second lamps are respectively engaged in the first and second cover bottoms, the protrusions are introduced into the holes.

Hereinafter, an edge type backlight unit of the present invention will be described in detail with reference to the accompanying drawings.

2 is a perspective view illustrating an edge type backlight unit of the present invention.

As shown in FIG. 2, the edge type backlight unit of the present invention divides the cover bottom into two parts corresponding to the first lamp 120a and the second lamp 120b formed in two rows, and thus the first and second cover bottoms 100 and 110. ), And the first and second reflecting plates 140a and 140b are integrally formed on the first and second cover bottoms 100 and 110, respectively, and the integrated first and second reflecting plates 140a, The edges of the first and second cover bottoms 100 and 110 are bent together with the 140b to surround the corresponding lamps 120a and 120b. Therefore, the first and second cover bottoms 100 and 110 and the first and second reflecting plates 140a and 140b attached thereto may function as a lamp housing, thus requiring a separate lamp housing. Do not. In addition, omitting the lamp housing does not require a screw for fastening the lamp housing to the cover bottom.

Hereinafter, the edge type backlight unit of the present invention will be described in more detail.

The first cover bottom 100 and the second cover bottom 110 are formed in the same size, and one side thereof is in contact with each other. On the sides in contact with each other, the first and second cover bottoms 100 and 110 are fastened through the screw 130 to be fixed without being separated from each other.

In addition, the first cover bottom 100 and the second cover bottom 110 may each include a horizontal plane, and corresponding lamps of the first lamp or the second lamp may correspond to one side of the horizontal plane, respectively, and may be perpendicular to the horizontal plane. The bending portions 101 and 111 of the vertical plane 111b and the upper horizontal plane 111a are further extended in one direction. Since the bending parts 101 and 111 surround the first lamp and the second lamp, a lamp housing for protecting the lamp is not required separately. The bending portions 101 and 111 are formed in a mold process of the first and second cover bottoms 100 and 110.

Here, the first reflecting plate 140a and the second reflecting plate 140b are formed on the first and second cover bottoms 100 and 110 to the vertical plane 111b and the upper horizontal plane 111a, respectively. Therefore, the light emitted from the first lamp 120a and the second lamp 120b is reflected into the space between the first lamp 120a and the second lamp 120b to minimize the loss of light. Although not shown, a light guide plate (not shown) is formed on the first reflecting plate 140a and the second reflecting plate 140b between the first lamp 120a and the second lamp 120b to form the first lamp ( The light emitted from the 120a) and the second lamp 120b is guided in the form of surface light and transmitted to the liquid crystal panel (not shown) on the upper part of the light guide plate.

Here, the first cover bottom 100 is bent together with the first reflecting plate 140a and the second cover bottom 110 together with the second reflecting plate 140b to form a shape surrounding the lamps 120a and 120b.

In addition, the remaining surfaces to which the lamps 120a and 120b of the first and second cover bottoms 100 and 110 do not correspond are further formed with a vertical plane in a direction perpendicular to a horizontal plane, which is formed on the reflective plates between the lamps. It protects the light guide plate and prevents light leakage to the outside. Here, a reflector may be further formed on a vertical surface formed from the remaining surfaces to which the lamps 120a and 120b of the first and second cover bottoms 100 and 110 do not correspond, and as shown, the reflector extends to the vertical plane. It may not be.

In addition, a diffusion plate (not shown) for uniformly diffusing the light emitted from the light guide plate and an upper portion of the light guide plate are disposed on the diffuser plate to collect light diffused from the diffusion plate and transfer the light to the liquid crystal panel (not shown). A prism sheet (not shown) and a protective sheet (not shown) positioned above the prism sheet to protect the prism sheet are further formed.

Here, the first lamp 120a and the second lamp 120b are disposed in a space defined by the vertical plane 111b and the upper horizontal plane 111a of the cover bottoms 100 and 110, respectively. The first lamp 120a and the second lamp 120b may be formed by arranging one or two or more of them in a row in a vertical direction. When the first lamp 120a and the second lamp 120b are formed of a plurality of lamp rows, the lamps are arranged at predetermined intervals. In addition, a lamp holder 160 is formed at one end and the end of the first and second lamps 120a and 120b to protect the electrodes formed to be spaced apart from each other by a predetermined distance and to apply a driving voltage to the lamps. In addition, a protrusion (see 161 of FIG. 6) is provided at an upper portion and / or a lower portion of the lamp holder 160 to be coupled to the first cover bottom 100 and the second cover bottom 110.

Here, the bent portion 111 is bent the vertical plane 111b and the upper horizontal plane 111a formed by bending from the horizontal planes of the first and second cover bottoms 100 and 110.

In addition, a screw 130 provided to connect the first and second cover bottoms 100 and 110 to each other is fastened to both the inner and outer rear surfaces of the first and second cover bottoms 100 and 110. It is possible. As shown in FIG. 3, the screw 130 is drawn in from the outer rear surfaces of the first and second cover bottoms 100 and 110, and as shown in FIG. 2, the first and second The screw 130 is shown to escape from the inside of the cover bottom (100, 110) to the outside. In any case, the screw 130 does not protrude to the horizontal plane of the other portions of the first and second cover bottoms 100 and 110.

As shown in FIG. 2, in the structure in which the screw 130 exits from the first cover bottom 100 through the second cover bottom 110 to the outer surface, the thickness of the head of the screw 130 is taken into consideration. 1, the second cover bottom (100, 110) to be coupled to the lower side than the horizontal surface of the other part when the mold. In addition, in the structure in which the screw 130 passes through the second cover bottom 110 and the first cover bottom 100 at the outer surface, the height of the screw 130 is increased to the thickness of the first and second cover bottoms. Correspondingly, or lowering the portion where the first and second cover bottoms 100 and 110 are coupled to the lower side than the horizontal plane of the other portion.

3 is a cross-sectional view illustrating a connection relationship between first and second cover bottoms of an edge type backlight unit according to a first embodiment of the present invention.

As shown in FIG. 3, the first cover bottom 100 and the first cover bottom 100 of the edge type backlight unit according to the first embodiment of the present invention are in contact with each other. The second cover bottom 110 partially overlaps each other, and holes are formed in the overlapped portions, and the screw 130 is transmitted through the holes so that the first cover bottom 100 and the second cover bottom 110 are formed. ) Are connected without being separated from each other.

Here, the portion where the first cover bottom 100 and the second cover bottom 110 are in contact with each other is formed to be about half as thin as a portion that is not in contact with each other so that the raised portions do not appear in the portions in contact with each other. In addition, as shown in the drawing, the direction in which the screw 130 enters from the lower side upwards of the first and second cover bottoms 100 and 110 is upward, so that the thickness of the head of the screw 130 is first. The cover bottom 100 and the second cover bottom 110 are prevented from bulging in contact with each other. At this time, the thread height of the screw 130 is limited to the total thickness of the portion where the first cover bottom 100 and the second cover bottom 110 abut each other.

In some cases, when the screw 130 is fastened in a downward direction from the upper side to the lower side of the first and second cover bottoms 100 and 110, the first cover bottom 100 and the second cover bottom 110 may be used. Are formed by lowering the head thickness of the screw 130 in contact with each other, and finally, when the screw 130 is fastened, the horizontal surfaces of the first cover bottom 110 and the second cover bottom 110 may be evenly leveled. There will be.

4 is a cross-sectional view illustrating a connection relationship between first and second cover bottoms of an edge type backlight unit according to a second embodiment of the present invention.

As illustrated in FIG. 4, the edge type backlight unit according to the second exemplary embodiment of the present invention has a 'c' shaped pattern of the first cover bottom 100 at a portion in contact with each other, and the second cover bottom 110. ) Is a structure formed in a '-' shape so as to be engaged in the '' 'pattern of the first cover bottom 100.

In this case, in the case where the 'c' and '-' shapes are not sufficiently engaged at the portions in contact with each other, similarly to the first embodiment, the lower portion of the first cover bottom 100 and the second cover bottom 110 may be formed. The screw 130 may be put in more complete tightening.

5 is a cross-sectional view illustrating a connection relationship between first and second cover bottoms of an edge type backlight unit according to a third exemplary embodiment of the present invention.

As shown in FIG. 5, the first cover bottom 100 and the second cover bottom 110 of the edge type backlight unit according to the third embodiment of the present invention are in contact with each other. The first cover bottom 100 and the second cover bottom 110 are connected by further forming an 'I'-shaped pattern 150 that allows the second cover bottom 110 to be engaged with each other.

6 is a cross-sectional view illustrating a connection relationship between a cover bottom and a lamp holder of the edge type backlight unit of the present invention.

As illustrated in FIG. 6, the edge type backlight unit of the present invention has a shape in which the second cover bottom 110 and the second reflecting plate 140b surround the second lamp (see 120b of FIG. 2).

In this case, a lamp holder 160 is formed at one end 162 and the other end of the second lamp 120b to protect an electrode formed to receive a voltage from the second lamp 120b.

At this time, the lamp holder 160 is a protrusion 161 is further formed on the upper and / or lower. Therefore, when the second lamp 120b is disposed at the bending portion 111 of the second cover bottom 110 in the assembling process of the backlight unit, the second reflecting plate 140b and the second cover bottom 110 are provided. The protrusion 161 enters through a hole provided in the second hole, and the second cover bottom 110 and the second lamp 120b are fixed to each other.

Although only the second cover bottom 110 is shown here, the first cover bottom 100 is also provided with a lamp holder having the same shape, and the fastening with the first lamp 120a will be made.

As described above, in the edge type backlight unit structure in which lamps are formed in two rows, the edge type backlight unit of the present invention has a feature of omitting a lamp housing by integrally forming a cover bottom and a reflecting plate in a shape surrounding each lamp. .

In particular, the screw housing required to fasten the lamp housing onto the cover bottom may be omitted by omitting the lamp housing, and the mold process for preparing a hole or the like provided on the cover bottom for fastening to the screw may also be omitted. This can be omitted, which reduces the time required to assemble the backlight unit as a whole.

The edge type backlight unit of the present invention as described above has the following effects.

First, the lamp housing may be omitted by integrally forming the cover bottom and the reflecting plate in a shape that surrounds the lamp for each of the lamps arranged in series in the backlight unit structure. In addition, it is also possible to omit the screw for connecting the lamp housing on the cover bottom, thereby reducing the number of parts for forming the backlight unit.

Second, material costs can be reduced by reducing the number of parts.

Third, a separate structure for fastening the screw or the like is not required, and only a process of integrally bending the cover bottom and the reflecting plate during the molding of the cover bottom is required, thereby shortening the mold process time.

Fourth, the assembly time can be shortened in the assembly process of the backlight unit due to the omission of the fastening means such as a screw for fastening the lamp housing and the lamp housing and the cover bottom.

Claims (9)

A first lamp and a second lamp; A first cover bottom having a lower horizontal plane in which the first lamp is disposed on one side, a vertical plane extending from the lower horizontal plane to cover one side of the first lamp, and an upper horizontal plane extending from the vertical plane to cover an upper portion of the first lamp; The second lamp is disposed on one side by having a lower horizontal plane, a vertical plane and an upper horizontal plane symmetrically with the first cover bottom, and is formed to cover the lower, one side and the upper part of the second lamp, and the first cover bottom A second cover bottom in contact with the other side of the; Formed on an upper surface of each lower horizontal plane of the first cover bottom and the second cover bottom, and on inner surfaces of each of the vertical plane and the upper horizontal plane, and together with the first cover bottom and the second cover bottom, the first lamp and the second lamp A first reflecting plate and a second reflecting plate respectively surrounding the first and second reflecting plates; And It is formed on both ends of the first lamp and the second lamp, and each includes a lamp holder having a projection on the upper and lower, A portion where the first cover bottom and the second cover bottom are in contact with each other is overlapped, and the first cover bottom and the second cover bottom are provided with opposing irregularities at portions where the first cover bottom and the second cover bottom are in contact with each other. Fastened to The first and second cover bottoms each have a thickness of half of the lower horizontal plane that is not in contact with each other at a portion in contact with each other, The screw is composed of a head and a thread, the head of the screw is located on the back of the first, the first cover bottom, the screw thread corresponds to the total thickness of the portion of the first and second cover bottom abut each other. Have a height, Edge type backlight unit, characterized in that the protrusions provided on the upper and lower portions of the lamp holders are inserted into the holes of the first and second cover bottoms. delete The method of claim 1, The light guide plate is further disposed on the first reflecting plate and the second reflecting plate between the first lamp and the second lamp. delete delete delete delete delete delete

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