KR101236180B1 - Lamp housing and liquid crystal display device having it - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device having a lamp housing that facilitates lamp replacement work and ensures mechanical rigidity against impact from the outside, the configuration comprising: a liquid crystal panel for displaying an image; Signal applying means for applying a signal to the liquid crystal panel; And a light source that provides light to the liquid crystal panel and covers upper and lower surfaces of the main body and upper and lower surfaces of the main body to guide the light guide plate and upper and lower surfaces of the main body to absorb impact of the light guide plate. And a backlight device having a lamp housing including a buffer part, wherein two cover parts are formed on the upper and left sides of the main body at the same time, and a buffer part is formed at a central angle with the cover part. In the case of forming one buffer unit on the lower surface, the buffer unit and the cover unit of the lower surface are asymmetrically positioned with respect to the buffer unit and the cover unit of the upper surface, and the width of the entire lamp housing from the end portions of both sides of the upper surface of the lamp housing. One lid each with a width of 1/4 or 1/3, and a width of 2/4 or 1/3 in the central region. Forming a charge, and is a reflective material applied to the interior of the lamp housing in which the lamp is housed characterized in that for reflecting the light emitted from the lamp.

Edge type backlight, sliding type, lamp housing, buffer part

Description

Lamp housing and liquid crystal display device having same {LAMP HOUSING AND LIQUID CRYSTAL DISPLAY DEVICE HAVING IT}

1 is an exploded perspective view of a liquid crystal display according to the related art.

Figure 2 is a perspective view showing a conventional sliding lamp housing

3 is a perspective view showing a lamp housing according to an embodiment of the present invention;

4 is a perspective view of a lamp housing according to another embodiment of the present invention;

5 is a cross-sectional view taken along the line A-A 'of FIG.

6 is an exploded perspective view of a liquid crystal display according to the present invention.

Explanation of symbols on the main parts of the drawings

110: main support 120: backlight device

122: reflector 124: fluorescent lamp

126: light guide plate 128: optical sheet

129: lamp housing 129a: buffer

129b: light guide plate cover 130: liquid crystal panel

132: circuit board 134: driving circuit

140: lower cover 150: upper cover

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lamp housing and a liquid crystal display device having the same, and more particularly, to a liquid crystal display device having a lamp housing that facilitates replacement of a lamp and secures mechanical rigidity against impact from the outside. .

In general, a liquid crystal display (LCD) is a representative flat display device that displays an image by adjusting the amount of light transmitted to correspond to an image signal. In recent years, such LCDs are becoming more and more widespread due to light weight, thinness, and low power consumption. For example, liquid crystal display devices used in small display devices such as laptops are large-sized panels. As this progressed, the scope of application reached LCD TVs.

The components of such LCD are as follows. 1 is an exploded perspective view showing the structure of a conventional liquid crystal display device. As shown in FIG. 1, a backlight device 20 and a liquid crystal panel 30 are sequentially stacked on a main support 10 having a substantially rectangular frame shape, and a lower cover 40 is coupled to a rear surface thereof. In addition, an upper cover 50 is positioned at the front edge of the liquid crystal panel 30 to be assembled and fastened to the main support 10 and the lower cover 40.

As shown in FIG. 1, the backlight device 20 is mounted on a fluorescent lamp 24 arranged along at least one side surface 12 of the main support 10 to emit light and on the main support 10. A reflector 22 reflecting light incident from the fluorescent lamp 24 and a light guide plate disposed on the reflector 22 and inserted into the lamp housing 29 at a predetermined distance from the fluorescent lamp 24; 26) and a plurality of optical sheets 28 provided on the light guide plate 26.

The light guide plate 26 is for guiding the light emitted from the fluorescent lamp 24 and uniformly supplying the light to the liquid crystal panel. The light guide plate 26 is fixed to the lamp housing 29. In addition, although there may be various ways of coupling the light guide plate 26 to the lamp housing 29, a sliding type is mainly used.

2 illustrates a light guide plate 26 and a lamp housing 29 fastened by the slide method, which slides the light guide plate 26 including the lamp 24 next to the lamp housing 29. It is assembled by pushing from. In this case, the lamp replacement in the lamp housing may be easy, but there is a problem in that the light guide plate collides with the lamp due to an external impact, and the lamp is broken.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object thereof is to provide a liquid crystal display device having a lamp housing that prevents damage to a lamp by securing mechanical rigidity against impact from the outside.

In addition, another object of the present invention is to provide a liquid crystal display device having a lamp housing that can easily replace the lamp by providing a guide portion for guiding the light guide plate in the lamp housing.

The lamp housing of the liquid crystal display device according to the present invention for achieving the above object includes an upper and lower surfaces, the main body having a lamp; A cover part extending from at least one of upper and lower surfaces of the main body to guide the light guide plate; And a buffer part formed on at least one of upper and lower surfaces of the main body to absorb the impact of the light guide plate.

In addition, the backlight device including the lamp housing includes at least one lamp for emitting light; A light guide plate for guiding light emitted from the lamp; And a main body including the upper and lower surfaces, a cover part extending from the upper and lower surfaces of the main body to guide the light guide plate, and a buffer part formed on the upper and lower surfaces of the main body to absorb the impact of the light guide plate. It includes a lamp housing, the upper surface of the main body is formed with two cover parts on both the left and right sides at the same time, the buffer portion is formed in the center area with the cover angle at the set angle, while forming one buffer unit on each of the upper and lower surfaces When the cushioning portion and the cover portion of the lower surface is located asymmetrically with respect to the buffer portion and the cover portion of the upper surface, 1/4 or 1/3 of the width of the entire lamp housing from the end portions of both sides of the upper surface of the lamp housing The cover part one each in the width of and the buffer part in the width of 2/4 or 1/3 in the central area, A reflective material is applied to the inside of the lamp housing to be lead to reflect light emitted from the lamp.

In addition, the configuration of the liquid crystal display device according to the present invention comprises a liquid crystal panel for displaying an image; Signal applying means for applying a signal to the liquid crystal panel; And a light source that provides light to the liquid crystal panel and covers upper and lower surfaces of the main body and upper and lower surfaces of the main body to guide the light guide plate and upper and lower surfaces of the main body to absorb impact of the light guide plate. And a backlight device having a lamp housing including a buffer part, wherein two cover parts are formed on the upper and left sides of the main body at the same time, and a buffer part is formed at a central angle with the cover part. In the case of forming one buffer unit on the lower surface, the buffer unit and the cover unit of the lower surface are asymmetrically positioned with respect to the buffer unit and the cover unit of the upper surface, and the width of the entire lamp housing from the end portions of both sides of the upper surface of the lamp housing. One lid each with a width of 1/4 or 1/3, and a width of 2/4 or 1/3 in the central region. Forming a charge, and is a reflective material applied to the interior of the lamp housing in which the lamp is housed characterized in that for reflecting the light emitted from the lamp.

First of all, the description of the present invention starts with the modification of the conventional lamp housing structure. In other words, assuming that the entire lamp housing is a main body, the light guide plate cover portion and the shock absorbing portion for preventing impact are formed on the upper and lower surfaces thereof. And the buffer part prevents the light guide plate from colliding with the lamp and breaking the fluorescent lamp as a result. In addition, the shock absorbing unit may also simultaneously play a role of guiding the light guide plate when the light guide plate is fastened to the lamp housing in addition to the shock absorbing function. Thus, the buffer part may be referred to as a guide part.

3 illustrates a lamp housing according to an embodiment of the present invention, and in particular, illustrates a state in which the light guide plate 126 and the lamp housing 129 are coupled to each other. As shown in Figure 3, the lamp housing 129 is made of a hemispherical shape with a constant opening to one side. In other words, two light guide plate cover parts 129b are formed on the upper and left sides thereof, and a buffer part 129a bent at a predetermined angle with the cover part 129b is formed in the central area. In particular, although the case in which the cover part 129b and the buffer part 129a formed integrally can be formed only on one surface of the upper surface or the lower surface, the present invention may be formed on both the upper and lower surfaces. Of course I have in mind.

The light guide plate 126 is inserted between the upper and lower surfaces of the cover part 129b formed as described above. In particular, the end portion of the buffer portion 129a which is bent at a set angle contacts the vertical surface of the light guide plate 126 inserted between the cover portion 129b. In this case, since the buffer portion 129a is formed to have a length shorter than the top surface of the cover portion 129b, the vertical surface of the light guide plate 126 and the end portion of the buffer portion 129a contact each other while being inserted into the cover portion 129b. Should be.

On the other hand, the buffer portion 129a is not particularly limited in length, but is firmly coupled to the light guide plate 126 inserted into the cover portion 129b and the light guide plate 126 does not touch the lamp installed in the lamp housing 129. It should be formed to an unreasonable length. In particular, the length of the buffer part 129a prevents the light guide plate 126 from moving inside the lamp housing 129 and collides with the lamp when an impact is applied to the light guide plate 126 or the lamp housing 129. You should be able to. In this regard, the length of the buffer portion 129a will vary depending on the buffer characteristics of the material forming the buffer portion 129a. (Of course, the buffer portion 129a may be integrally formed with the same material as the cover portion 129b or may be installed with a different material).

In addition, when the width of the buffer portion 129a divides the portion where the lamp housing 129 and the light guide plate 126 engage into approximately four equal parts, one quarter portions of both sides are formed of the light guide plate cover portion 129b. In the center, the 2/4 portion is preferably formed by the buffer portion 129a. But it is not necessarily limited to that. In other words, the width ratio of the buffer portion 129a and the cover portion 129b of the lamp housing 129 of the present invention is not made of a specific ratio, but the light guide plate 126 and the lamp housing 129 are firmly coupled to the lamp housing. Any ratio would be possible as long as the lamp of 129 could be safely protected from impact.

For example, if the lamp housing 129 and the light guide plate 126 are roughly divided into three parts, one-third portion of both sides forms the light guide plate cover portion 129b, and one-third portion of the central region is a buffer portion ( The ratio of forming 129b) may be possible, and other ratios may be possible.

On the other hand, since the shock absorbing degree of the shock absorbing portion 129a may vary depending on the material of the shock absorbing portion 129a, the width ratio between the shock absorbing portion 129a and the cover portion 129b is also the material of the shock absorbing portion 129a. Of course should depend. In addition, the length of the light guide plate 126 moves into the lamp housing 129 due to the degree of shock absorption, that is, the impact varies depending on the width of the buffer portion 129a. It will vary depending on the width of the buffer portion 129a.

If the buffer part 129a is formed only on the upper surface of the lamp housing 129, an impact is applied from the outside to move the light guide plate 126 into the lower surface of the lamp housing 129 (that is, the upper surface side is fixed). The light guide plate 126 may be tilted at its original position because only the bottom surface is moved to the lower side. Therefore, in order to prevent this, the lower surface of the lamp housing 129 may be formed at the position of the lower surface corresponding to the buffer portion 129a of the upper surface so as to be symmetrical with the upper surface. Of course, in the case of forming one buffer unit 129a on the upper and lower surfaces in this manner, the buffer unit 129a can be formed at positions different from each other on the upper and lower surfaces.

4 is a view showing the structure of the lamp housing 129 according to another embodiment of the present invention. As shown in Fig. 4, the lamp housing 129 of the present embodiment is configured almost similarly to the lamp housing 129 of the embodiment shown in Fig. 3, except that the only difference is the buffer portion 129a and the lid portion 129b. ) Position is reversed.

In other words, in the present embodiment, one buffer unit 129a is formed at each of the upper and lower ends of the lamp housing 129 at a width of about 1/4 or 1/3 of the width of the entire lamp housing 129. The light guide plate cover 129b is formed in the central region. Of course, as described above with reference to FIG. 3, the upper and lower surfaces of the lamp housing 129 may be symmetrically formed at positions corresponding to each other, or may be formed at different positions (that is, positions not corresponding to each other). .

On the other hand, in the embodiment shown in Figures 3 and 4 has shown that a specific number of the buffer portion (129a) is formed on the upper and / or lower surface of the lamp housing 129, respectively. However, the number of the buffer parts 129a need not be particularly limited. For example, three, four or more buffer sections 129a may be formed on the top and / or bottom surfaces of the lamp housing 129. If the upper and lower surfaces are formed, the corresponding relationship is not very different from the previous one.

FIG. 5 is a cut perspective view taken along line AA ′ of FIG. 3 (a perspective view illustrating a cross section of FIG. 3), illustrating a vertical surface of the light guide plate 126 and an end portion of the shock absorbing portion 129a. Referring to FIG. 5, the light guide plate 126 and the shock absorbing portion 129a are in contact with each other. The light guide plate 126 may be formed at an upper portion or a lower surface of the lamp housing 129 than at an end portion of the light guide plate cover portion 129b. It is fixed at a certain interval toward the inside. In this case, the interval between the cover portion 129b (or the width of the buffer portion 129a) may be appropriate as long as the lamp housing 129 fixes the light guide plate 126 as in the conventional sliding method.

The cover 129b of the lamp housing 129 may not only fix the light guide plate 126 but also guide the light guide plate 126 to the lamp housing 129. In this regard, the cover part 129b may be referred to as a guide part. As such, as the guide part is provided, the lamp housing 129 and the light guide plate 126 may be easily fastened. In addition, since the buffer part 129a contacts the vertical surface of the light guide plate 126, it may be referred to as a stopper in the sense of stopping the light guide plate 126 from moving to the lamp in the lamp housing 129 by an impact. .

The lamp housing 129 is usually formed of a material such as aluminum having a good reflectance. The lamp housing 129 may be formed by a press method using a predetermined mold frame, or may be formed of another material. In addition, it is preferable to apply a reflective material to the inside of the lamp housing 129 to improve the reflection efficiency of the light emitted from the lamp.

As described above, the lamp housing 129 is fastened to the backlight device 120 to form a liquid crystal display device. 6 is an exploded perspective view showing the structure of a liquid crystal display according to the present invention. As shown in the figure, the liquid crystal display device according to the present invention is located in the upper and lower covers 150 and 140, and consists of an upper plate and a lower plate to display an image and a lower side of the liquid crystal panel 130. The backlight unit 120 is positioned to provide light to the liquid crystal panel 130, and a main support 110 for accommodating and supporting the liquid crystal panel 130 and the backlight device 120.

Although not shown in detail in the drawing, the liquid crystal panel 130 includes an upper substrate and a lower substrate. The lower substrate is a thin film transistor substrate, and a thin film transistor, which is a switching element, is formed in a plurality of pixels, which applies an image signal from the outside to a pixel electrode formed in the pixel. In addition, the upper substrate is a substrate for representing an actual image as a color filter substrate. In addition, a liquid crystal layer is formed between the upper substrate and the lower substrate to adjust a transmitted light according to an input image signal to implement a desired image.

The liquid crystal panel 130 is provided with a circuit board 132 on which a driving circuit 134 such as a timing controller is mounted, along at least one edge of the backlight device 120, and the main support 110. The bottom cover 140 is coupled to the back of the bottom side, and the driving circuit 134 of the liquid crystal panel 130 is folded and adhered to the bottom of the bottom cover 140 during the modularization of the liquid crystal display.

Here, the timing controller substantially controls the data and gate driver coupled to the liquid crystal panel 130. In addition, the lamp driving unit is controlled to drive the lamp in the backlight device 120. The controller rearranges the digital video data supplied from an external digital video card (not shown) for each red (R), green (G), and blue (B). The data R, G, and B rearranged by this timing controller are supplied to the data driver.

Also, the timing controller generates a data control signal and a gate control signal using the horizontal / vertical synchronization signals H and V input thereto. The data control signal is supplied to the data driver including a dot clock (DCLK), a source shift clock (SSC), a source enable signal (SOE), a polarity inversion signal (POL), etc., while the gate control signal is a gate start. A pulse GSP, a gate shift clock GSC, a gate output enable GOE, and the like are supplied to the gate driver 106.

The backlight device 120 supplies light to the liquid crystal panel 130. As mentioned above, the timing controller controls the lamp driver to drive the lamp in accordance with the time point at which data is supplied to the liquid crystal panel 130. At this time, the edge type backlight having a lamp installed on the side like the backlight device 120 supplies light to the liquid crystal panel 130 through the light guide plate 126 provided on the lower surface of the liquid crystal panel 130. Of course, the lamp 124 is installed in the backlight device 120 in a state protected by the lamp housing 129, the lamp housing 129 is not only to protect the lamp but also has a good reflective properties therein The light emitted from the lamp is reflected to enter the light guide plate 126.

The fluorescent lamp 124 and the light guide plate 126 are fastened to a side of the light guide plate 126 in the lamp housing 129 at regular intervals. In this case, one or more fluorescent lamps 124 may be installed depending on the application target of the LCD, and may be arranged in a single layer or a plurality of layers. The lamp housing 129 and the fluorescent lamp 124 therein may be provided at both sides of the light guide plate 126, respectively.

On the other hand, the light emitted from the fluorescent lamp 124 is directly incident to the light guide plate 126 or reflected on the inner wall of the lamp housing 129 and then incident to the light guide plate and transmitted through a plurality of optical sheets 128 located in front After that, it is supplied to the liquid crystal panel 130.

In addition, the upper cover 150 having a rectangular frame shape covering the edge of the liquid crystal panel 130 is assembled and fastened to the main support 110 and the lower cover 140 to complete the liquid crystal display device. In this case, the main support 110 may be open at one side 112 on which the fluorescent lamp 124 is arranged, and in some cases, bent inward and inward at the edge of the lower cover 140 corresponding to the corresponding part. And a bending part (not shown) in which the lamp housing 129 and the fluorescent lamp 124 are mounted along the length direction of the inside. Therefore, the banding part (not shown) may also function as a part of the actual main support 110.

This invention is not necessarily limited only to the structure as mentioned above. Since the above-described structure is only one example for explaining the present invention, although not separately illustrated in the drawings, for example, the lower cover 140 may cover a part or the entire rear surface of the main support 110, and When the fluorescent lamps 124 are arranged along the inner longitudinal direction of both edges of the main support 110 facing each other, the lamp housings of the present invention may be provided in pairs of the same shape facing each other to protect them. There will be.

Accordingly, the scope of the invention should not be defined by the foregoing description, but should be defined by the appended claims.

As described above, the liquid crystal display device having the lamp housing according to the present invention includes a shock absorbing part that absorbs an impact upon external impact, thereby facilitating replacement of the lamp when the backlight device is fastened, and securing mechanical rigidity against external shock. By doing so, it is possible to prevent breakage of the lamp.

Claims (19)

delete delete delete delete delete delete At least one lamp for emitting light; A light guide plate for guiding light emitted from the lamp; And The lamp includes a main body including an upper and a lower surface, a cover part extending from upper and lower surfaces of the main body to guide the light guide plate, and a buffer part formed on upper and lower surfaces of the main body to absorb the impact of the light guide plate. A housing, On the upper surface of the main body, two cover parts are formed on both the left and right sides, and a buffer part is formed in the center area at the set angle with the cover part, while one buffer part is formed on each of the upper and lower surfaces to cushion the lower surface. The part and the cover part are located asymmetrically with respect to the buffer part and the cover part of the upper surface, Said cover parts one by one each in the width of 1/4 or 1/3 of the width of the entire lamp housing from the end portions of both sides of the upper surface of the lamp housing, and in the center region by the width of 2/4 or 1/3 Forms a buffer, And a reflective material is applied to the inside of the lamp housing in which the lamp is accommodated to reflect light emitted from the lamp. 8. The backlight device of claim 7, wherein an end portion of the buffer portion, which is bent at a predetermined angle with the cover portion, is in contact with a vertical surface of the light guide plate inserted between the cover portions. The backlight device of claim 8, wherein the buffer part is formed to have a length shorter than that of the cover part, and the vertical surface of the light guide plate and the end of the buffer part contact each other while the light guide plate is inserted into the cover part. The backlight device of claim 8, wherein the light guide plate is fixed at a predetermined interval toward the inside of the lamp housing rather than an end portion of a cover part formed on upper and lower surfaces. The backlight device of claim 8, wherein the buffer part and the cover part are integrally formed. A liquid crystal panel for displaying an image; Signal applying means for applying a signal to the liquid crystal panel; And A buffer for providing light to the liquid crystal panel, a cover including upper and lower surfaces, a cover portion extending from upper and lower surfaces of the main body to guide the light guide plate, and formed on upper and lower surfaces of the main body to absorb impact of the light guide plate A backlight device having a negative lamp housing; On the upper surface of the main body, two cover parts are formed on both the left and right sides, and a buffer part is formed in the center area at the set angle with the cover part, while one buffer part is formed on each of the upper and lower surfaces to cushion the lower surface. The part and the cover part are located asymmetrically with respect to the buffer part and the cover part of the upper surface, Said cover parts one by one each in the width of 1/4 or 1/3 of the width of the entire lamp housing from the end portions of both sides of the upper surface of the lamp housing, and in the center region by the width of 2/4 or 1/3 Forms a buffer, And a reflective material is applied to the inside of the lamp housing in which the lamp is accommodated to reflect light emitted from the lamp. 13. The apparatus of claim 12, wherein the signal applying means comprises: a data driver for supplying data to data lines of the liquid crystal panel; A gate driver for supplying a gate pulse to the gate line of the liquid crystal panel; And a timing controller controlling the data driver and the gate driver. The apparatus of claim 13, wherein the backlight device comprises: at least one lamp emitting light; A light guide plate for guiding light emitted from the lamp; And the lamp housing in which the lamp is accommodated and the light guide plate is coupled. 15. The liquid crystal display device according to claim 14, wherein the backlight device comprises a lamp driver for driving a lamp according to a control signal from the timing controller. The liquid crystal display of claim 12, wherein an end portion of the buffer portion, which is bent at a predetermined angle with the cover portion, is in contact with a vertical surface of the light guide plate inserted between the cover portions. 17. The liquid crystal display of claim 16, wherein the buffer portion is formed to have a length shorter than that of the cover portion so that the vertical surface of the light guide plate and the end portion of the buffer portion contact each other while the light guide plate is inserted into the cover portion. The liquid crystal display of claim 16, wherein the light guide plate is fixed to the inside of the lamp housing by a predetermined distance from the ends of the cover parts formed on the upper and lower surfaces. 17. The liquid crystal display device according to claim 16, wherein the buffer part and the cover part are integrally formed.

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