KR20090058257A - Guide for lamp fixation, back light and liquid crystal display device using the same - Google Patents

Abstract

A guide for lamp fixation, a backlight unit and an LCD display device using the same are provided to prevent the damage of a lamp and the noise in a guide for fixing the lamp. A lamp fixing guide(100) includes a lamp holder(102), a supporting unit(106), a protrusion(110) and a fixing unit(104). The lamp holder is coupled with the lamp, and the supporting unit has a curved line and includes the lamp holder. The protrusion is formed on the supporting unit to prevent the damage of plural optical sheets, and the fixing unit fixes the supporting unit.

Description

GUIDE FOR LAMP FIXATION, BACK LIGHT AND LIQUID CRYSTAL DISPLAY DEVICE USING THE SAME}

The present invention relates to a liquid crystal display, and more particularly, to a lamp fixing guide capable of preventing noise in a lamp fixing guide due to vibration, a backlight unit and a liquid crystal display using the same.

Recently, various flat panel display devices that can reduce weight and volume, which are disadvantages of cathode ray tubes, have emerged. Such flat panel displays include a liquid crystal display, a field emission display, a plasma display panel, a light emitting display device, and the like.

The liquid crystal display has a high contrast ratio, is suitable for moving picture display, and has low power consumption. Therefore, the liquid crystal display device is most actively used in the notebook, monitor, and TV fields.

Such a liquid crystal display device displays an image by adjusting the light transmittance of the liquid crystal using an electric field. To this end, the liquid crystal display includes a liquid crystal panel having a liquid crystal cell, a backlight unit for irradiating light to the liquid crystal panel, and a driving circuit for driving the liquid crystal cell.

At this time, since the liquid crystal panel of the liquid crystal display device is a light-receiving element that displays an image by adjusting the transmittance of light from the outside, a back light unit, which is a separate light source for irradiating light to the liquid crystal panel, is required. . The backlight unit is divided into an edge method and a direct method according to the installed position.

First of all, the direct type method is mainly developed as the size of the liquid crystal display device is increased to 20 inches or more. A plurality of lamps are arranged in a row on the lower surface of the diffuser plate to direct light directly to the front of the LCD panel. will be.

The direct method is mainly used for a large screen liquid crystal display device requiring high luminance because the light utilization efficiency is higher than that of the edge method.

In addition, the edge method is that the lamp unit is installed on the side of the light guide plate for guiding the light, the lamp unit is inserted into both ends of the lamp to emit light, the lamp holder to protect the lamp and the outer circumferential surface of the lamp and one side It is provided with a lamp reflecting plate fitted to the side of the light guide plate to reflect the light emitted from the lamp toward the light guide plate.

The edge method in which the lamp unit is installed on the side of the light guide plate is applied to a relatively small liquid crystal display device such as a monitor of a laptop computer and a desktop computer, and has good uniformity of light and a long service life. It is advantageous to thin the liquid crystal display device.

In this case, as a light source for generating light in the direct type backlight unit, a cold cathode fluorescent lamp (CCFL), an exterior electrode fluorescent lamp (EEFL), a light emitting display device (LED) Etc. are used.

In the case of the backlight unit using a lamp, a plurality of lamps irradiate light to the liquid crystal panel, the lamp is used as the field of use of the liquid crystal display device is diversified, and as the size is increased to 20 inches or more, the size also increases to fix them Needed a lamp guide for.

In addition, the lamp guide that is conventionally installed to guide the lamp is installed on the cover bottom, in this case, when installed on the bottom cover to secure the lamp is unsafely assembled by the dimensional deviation between them. Accordingly, the liquid crystal display device having a conventional lamp guide generates noise due to vibration caused by external force or other vibrations of the speaker during use, and the lamp may be damaged by the lamp guide when the vibration is severe.

In order to solve the above problems, the present invention is to provide a lamp fixing guide, a backlight unit and a liquid crystal display using the same to prevent the lamp breakage, to prevent noise in the lamp fixing guide by vibration. .

Lamp fixing guide according to the present invention and at least one lamp holder for the lamp is fastened; A support portion in which the lamp holder is formed and having a curvature; A protrusion formed on the support to prevent sagging on a plurality of optical sheets; And at least one fixing part for fixing the support part.

Lamp fixing guide according to the present invention, the backlight unit and the liquid crystal display using the same is formed by the lamp fixing guide having elasticity, the support portion has a curvature, by the elasticity and curvature when fixing the lamp fixing guide to the bottom cover It is fixed tightly by repulsive force. Therefore, noise generated in the liquid crystal display and lamp breakage due to vibration caused by external force or vibration of the speaker during use due to numerical error between the hole of the bottom cover and the fixing part of the lamp fixing guide can be prevented. In addition, by forming the material of the guide for fixing the lamp to the elastic material can be more easily assembled in fixing the work.

In addition, the lamp fixing guide of the present invention forms projections of the lamp fixing guide vertically protruding to support the plurality of optical sheets to have a rounded cone shape, thereby preventing dark spots and light leakage due to breakage of the plurality of optical sheets. can do.

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

1 is a view showing a lamp fixing guide according to an embodiment of the present invention.

1, the lamp fixing guide 100 according to an embodiment of the present invention includes at least one lamp holder 102 to which the lamp is fastened, and at least one lamp holder 102 having a curvature. The support part 106 and the protrusion part 110 formed on the support part 106, and the at least one fixing part 104 for fixing the support part are comprised, in order to prevent sagging on the some optical sheet.

At least one support 106 is formed to have a curvature and to support the lamp fixing guide 100. Here, the support unit 106 is stably coupled to the lamp fixing guide 100 by the repulsive force between the bottom cover and the support unit 106 by curvature when the lamp fixing guide 100 is fixed to the bottom cover (not shown). To form a close contact. In this case, the support 106 may be formed to have elasticity.

At least one lamp holder 102 is formed to enclose a lamp, not shown, on at least one support 102. Here, the lamp holder 102 is formed to fix the lamp. In this case, the lamp holder 102 may be formed of a transparent material so as not to affect the light emitted from the lamp.

The upper part of the lamp holder 102 has a buffer function that buffers the protrusion 104 and the lower part of the support part 106 corresponding to the lamp holder 102 to prevent the lamp from being separated by an impact or vibration. It is configured to include a portion 108.

The buffer unit 108 is formed under the support unit 106 corresponding to the lamp holder 102 and serves as a buffer in a space generated when fixing the lamp fixing guide 100 to the bottom cover.

The protrusion 110 is formed to have at least one cone shape on the support 106. Here, the protrusion 110 prevents sag on a plurality of optical sheets (not shown). In this case, the protrusion 110 may be formed in a conical shape with rounded ends to prevent damage to the plurality of optical sheets.

The fixing part 114 is formed to have the same hook shape 116 on both sides with respect to the central part corresponding to the protrusion part 110. Here, the fixing part 114 penetrates the bottom cover (not shown) to fix the lamp fixing guide 100 at the bottom of the bottom cover. At this time, a fixing layer 112 is formed between the fixing part 114 and the protrusion part 110 to compensate for the step caused by the reflective sheet (not shown) when fixing the lamp fixing yoke guide 100 to the bottom cover.

The lamp holder 102, the supporting portion 106, the protrusion 110, the fixing portion 114, the protrusion 104, the buffer 108, and the complementary layer 112 constituting the lamp fixing guide 100, respectively. ) May be integrally formed or assembled. The lamp fixing guide 100 is formed of a reflective material or is formed to reflect light from the lamp by applying a reflective material.

In addition, the lamp fixing guide 100 may be formed of a material having elasticity, and the elastic material may be formed of any one of polyethylene terephthalate (PET) or polytetrafluoroethylene (PTFE) which is a fluorocarbon polymer. have.

The lamp fixing guide has elasticity and is formed to have a curvature so that the lamp fixing guide is tightly fixed by repulsive force due to elasticity and curvature when fixing the lamp fixing guide to the bottom cover. Therefore, noise generated in the liquid crystal display and lamp breakage due to vibration caused by external force or vibration of the speaker during use due to numerical error between the hole of the bottom cover and the fixing part of the lamp fixing guide can be prevented. In addition, by forming a material of the guide for fixing the lamp to the elastic material can be more easily assembled in fixing the work.

2 is a view showing a backlight unit according to an embodiment of the present invention, Figure 3 is a cross-sectional view of the backlight unit according to an embodiment of the present invention.

Referring to FIG. 2, the backlight unit 200 according to an exemplary embodiment of the present invention may include a plurality of lamps 136 having first and second electrodes 134 and 138 and a plurality of lamps 136. Installed on the bottom cover 120 and the bottom cover 120 is configured to include a lamp fixing guide 100 for fixing a plurality of lamps (136).

In addition, the backlight unit 200 includes a first socket part 130 having a plurality of first sockets 132 connected to the first electrode 138 of each lamp 136, and a second of each lamp 136. A second socket portion 126 having a plurality of second sockets 128 connected to the electrode 134, and disposed on one side of the bottom cover 120, so that the first socket portion 130 and each of the lamps A first side support 142 surrounding one side edge and a second side support 140 disposed on the other side of the bottom cover 120 and surrounding the other edge of the second socket portion 126 and each lamp 136, and a plurality of It comprises a plurality of optical sheets 148 disposed on the front of the bottom cover 120 so as to face the lamp 136 of the.

Each of the plurality of lamps 120 is formed to have first and second electrodes 134 and 138. Here, the plurality of lamps 120 receives power from the first and second socket parts 130 and 126 disposed on both sides of the bottom cover 120. In this case, the plurality of lamps 120 may be any one of an External Electrode Fluorescent Lamp (EEFL), a Cold Cathode Fluorescent Lamp (CCFL), an External Internal Fluorescent Lamp (EIFL), and a Hot Cathode Fluorescent Lamp (HCFL).

The bottom cover 120 accommodates the plurality of lamps 136 and is formed to open at both sides thereof. In addition, at least one hole 124 for installing the lamp fixing guide 100 is formed on the bottom surface of the bottom cover 120. Here, the bottom cover 120 has the first and second socket portions 126 and 130 fastened to the electrodes 134 and 138 of the respective lamps on both sides of the bottom cover 120.

In addition, first and second side supports 140 and 142 are installed at both sides of the bottom cover 120. The reflective sheet 122 is attached to the side and bottom surfaces of the bottom cover 120 to reflect the light from the plurality of lamps 136 toward the plurality of optical sheets 148. Here, the reflective sheet 122 is not attached to the portion corresponding to the at least one or more holes 124 and the first and second socket portions 126 and 130 passing through the bottom cover 120. Can be.

 The bottom cover 120 may be formed of a material having high thermal conductivity so that heat generated from the backlight unit 200 may be discharged to the outside.

The lamp fixing guide 100 is installed in the hole 124 formed in the bottom surface of the bottom cover 120, as shown in FIG. Here, the lamp fixing guide 100 is installed on the bottom surface of the bottom cover 120 corresponding to the at least one lamp 136 to fix the lamp 136. The lamp fixing guide 100 is elastic and has at least one lamp holder 102 for fastening the lamp, at least one support 106 having a lamp holder 102 formed therein, and a plurality of lamp holders. It comprises a projection 110 formed on the support 106 and at least one fixing portion 104 for fixing the support 106 to prevent sagging on the optical sheet 148.

At least one support 106 has a curvature and is formed to support the lamp fixing guide 100. Here, the at least one support unit 106 is unfolded by the pressure for fixing when the lamp fixing unit 114 is fixed through the hole 124 of the bottom cover 120. Therefore, the curvature is reduced to the support portion 106, at this time, by the repulsion between the bottom cover 120 and the support portion 106 by the curvature is formed so that the lamp fixing guide 100 is stably coupled and in close contact. . Such, the support portion 102 may be formed to have elasticity.

At least one lamp holder 102 is formed to surround the lamp 136 on at least one support 106. The lamp holder 102 is formed to fix the lamp 136. Here, the lamp holder 102 may be formed of a transparent material so as not to affect the light emitted from the lamp 136.

As such, the upper portion of the lamp holder 102 is buffered in the protrusion 104 and the lower portion of the support portion 106 corresponding to the lamp holder 102 to prevent the lamp 136 from being separated by the impact or vibration. It is configured to include a buffer 108 that serves.

The buffer unit 108 is formed at the lower portion of the support unit 106 corresponding to the lamp holder 102 and serves as a buffer in a space generated when the lamp fixing guide 100 is fixed to the hole 124 of the bottom cover 120. do.

The protrusion 110 is formed to have at least one cone shape on the support 106. Here, the protrusion 110 prevents sagging of the plurality of optical sheets 148. In this case, the protrusion 110 may be formed in a conical shape with rounded ends to prevent damage to the plurality of optical sheets 148.

The fixing part 114 is formed to have a hook shape 116 on both sides of the central part corresponding to the protrusion part 110. Here, the fixing part 114 penetrates the hole 124 of the bottom cover 120 to fix the lamp fixing guide 100 at the bottom of the bottom cover 120. In this case, a complementary layer 112 is formed between the fixing part 114 and the protrusion part 110 to compensate for the step generated by the reflective sheet 122 generated during fixing.

The lamp holder 102, the supporting portion 106, the protrusion 110, the fixing portion 114, the protrusion 104, the buffer 108, and the complementary layer 112 constituting the lamp fixing guide 100, respectively. ) May be integrally formed or assembled. The lamp fixing guide 100 is formed of a reflective material or is formed to reflect light from the lamp by applying a reflective material.

In addition, the lamp fixing guide 100 may be formed of a material having elasticity, and the material having elasticity may be formed of any one of polyethylene terephthalate (PET) or polytetrafluoroethylene (PTFE) which is a fluorocarbon polymer. Can be.

The first socket part 130 is supplied with a driving voltage for driving each lamp 136. Here, the first socket part 130 receives the driving voltage supplied to the common line (not shown) of the first substrate and the first substrate through the plurality of first sockets 132 and the first electrode of each lamp 136. To (138).

At this time, the first socket 132 is a body disposed on the first substrate to support one edge of the lamp 136, a clip and a balance disposed on the body to be electrically connected to the first electrode 138 of the lamp 136 An element and the like.

The second socket part 126 is supplied with a driving voltage for driving each lamp 136. Here, the second socket part 126 is a second electrode of each lamp 136 through a plurality of second sockets 128 for driving voltage supplied to the common line (not shown) of the second substrate and the second substrate. To 136.

At this time, the third socket 128 is a body disposed on the first substrate to support one edge of the lamp 136, a clip and a balance disposed on the body to be electrically connected to the third electrode 136 of the lamp 136 An element and the like.

The first side support 142 is installed at one edge of the cover 120 to surround one edge of the lamp 136 mounted to the first socket 130. To this end, the first side support 142 includes an inclined surface that reflects light emitted from the lamp 136, and a lamp hole formed in the inclined surface and penetrated by the lamp 136. The first side support 142 is installed at one edge of the cover 120 by a screw.

The second side support 140 is installed at the other edge of the cover 120 to surround the other edge of the lamp 136 mounted to the second socket 126. To this end, the second side support 140 is configured to include an inclined surface that reflects light emitted from the lamp 136 and a lamp hole formed in the inclined surface and penetrated by the lamp 136. The second side support 140 is installed at the other edge of the cover 120 by a screw.

Therefore, the bottom cover 120 has a rectangular frame shape by installing the first and second side supports 142 and 140.

In the plurality of optical sheets 148, the diffusion plate 144 and the plurality of optical members 146a and 146b are sequentially stacked on the bottom cover 120. Here, the plurality of optical sheets 148 may collect at least one diffusion sheet for diffusing the light radiated from the plurality of lamps 136 to the entire area of the liquid crystal panel (not shown), and for condensing the light diffused by the diffusion sheet. It comprises at least one prism sheet. Here, the laminated structure of each of the at least one diffusion sheet and the prism sheet may be sequential, non-sequential or alternating to improve brightness and uniformity of the light.

In the backlight unit using the lamp fixing guide, the lamp fixing guide has elasticity and the support portion has a curvature so that the lamp fixing guide is elastically fixed by the resilience and curvature due to the elasticity and curvature of the lamp fixing guide. Therefore, due to numerical error between the hole of the bottom cover and the fixing portion of the lamp fixing guide, the liquid crystal display may reduce noise generated by vibration caused by external force or other vibrations of the speaker during use. In addition, by forming the material of the guide for fixing the lamp to the elastic material can be more easily assembled in fixing the work.

4 is a diagram illustrating a liquid crystal display according to an exemplary embodiment of the present invention, and FIG. 5 is a cross-sectional view illustrating a liquid crystal display according to an exemplary embodiment of the present invention.

4 and 5, a liquid crystal display according to an exemplary embodiment of the present invention includes a liquid crystal panel 308 for displaying an image by adjusting light transmittance, and a backlight unit for irradiating light to the liquid crystal panel 308. 200).

The backlight unit 200 is formed of the backlight unit of the present invention, as shown in FIGS. 1 and 3.

The liquid crystal panel 308 is composed of lower and upper substrates 304 and 306 bonded to each other. At this time, the lower substrate and the upper substrate (304, 306) comprises a spacer (not shown) and a liquid crystal layer (not shown) for maintaining a constant gap thereof.

The upper substrate 306 includes at least three color filters including red, green, and blue, a separation of each color filter, a black matrix defining a pixel cell, a common electrode supplied with a common voltage, and the like. Here, the common electrode may be formed on the lower substrate 304 according to the mode of the liquid crystal.

The lower substrate 304 includes a plurality of data lines and a plurality of gate lines formed to cross each other, a thin film transistor (TFT), and a thin film transistor formed in each pixel cell region defined by crossing the data lines and the gate lines. And a pixel electrode connected to the TFT). The thin film transistor TFT supplies the image signal from the data line to the liquid crystal cell in response to the gate pulse from the gate line.

The liquid crystal cell (not shown) may be equivalently represented as a liquid crystal capacitor because the liquid crystal cell includes a common electrode facing each other with a liquid crystal layer interposed therebetween and a pixel electrode connected to the thin film transistor TFT. The liquid crystal cell also includes a storage capacitor for maintaining the image signal charged in the liquid crystal capacitor until the next image signal is charged.

The non-display area of the lower substrate 304 is provided with a data pad area connected to each of the data lines and a gate pad area connected to each of the gate lines.

A plurality of data circuit films 312 on which data integrated circuits 310 are mounted to supply image signals to data lines are attached to the data pad area. Each data circuit film 312 may be a tape carrier package or a chip on film. Each of the data circuit films 312 supplies a data signal and a control signal supplied from a timing controller (not shown) to the data integrated circuit 310, and outputs an image signal output from the data integrated circuit 310 to each data line. To feed.

A plurality of gate circuit films 314 mounted with a gate integrated circuit 316 for supplying a gate-on voltage to the gate lines are attached to the gate pad region. Each gate circuit film 314 may be a tape carrier package or a chip on film. Each of the gate circuit films 314 supplies a gate control signal supplied from the timing controller through the gate circuit film 314 and the lower substrate 304 to the gate integrated circuit 316, and from the gate integrated circuit 316. The output gate on voltage is supplied to each gate line.

The bottom cover 120 is formed to accommodate the backlight unit 200.

The panel guide 302 is formed in the shape of a rectangular border on the bottom cover 120. Here, the panel guide 302 is installed on the bottom cover 120 and the first second support mains 142 and 140 to support the liquid crystal panel 308 and to fix the plurality of optical sheets 148. . At this time, the panel guide 302 is assembled to the panel guide 302 and the bottom cover 120 is assembled with the top cover 318 of the rectangular frame shape that borders the edge of the liquid crystal panel 308.

The top cover 318 surrounds the front edge of the liquid crystal panel 308 disposed on the bottom cover 120 and the side of the bottom cover 120. To this end, the top cover 318 includes a non-display area, that is, a flat portion covering the edge, except for the display area of the liquid crystal panel 308, and a side portion bent vertically from the flat portion to surround the side of the bottom cover 120. It is configured by.

In such a liquid crystal display, the lamp fixing guide has elasticity and the support portion has a curvature so that the lamp fixing guide is elastically fixed by the resilience and curvature due to the curvature when the lamp fixing guide is fixed to the bottom cover. Therefore, due to numerical error between the hole of the bottom cover and the fixing portion of the lamp fixing guide, the liquid crystal display may reduce noise generated by vibration caused by external force or other vibrations of the speaker during use. In addition, by forming the material of the guide for fixing the lamp to the elastic material can be more easily assembled in fixing the work.

In addition, the lamp fixing guide of the present invention forms projections of the lamp fixing guide vertically protruding to support the plurality of optical sheets to have a rounded cone shape, thereby preventing dark spots and light leakage due to breakage of the plurality of optical sheets. can do.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

1 is a perspective view showing a lamp fixing guide according to an embodiment of the present invention.

2 is a view showing a backlight unit using a lamp fixing guide according to an embodiment of the present invention.

3 is a cross-sectional view showing a backlight unit using a lamp height guide according to an embodiment of the present invention.

4 is a view showing a liquid crystal display using a lamp fixing guide according to an embodiment of the present invention.

5 is a cross-sectional view of a liquid crystal display using a guide for lamp height according to an embodiment of the present invention.

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

100: lamp fixing guide 102: lamp holder

104: fixed part 106: support part

108: buffer unit 110: protrusion

112: complementary layer 114: fixed part

116: hook

Claims (9)

At least one lamp holder for fastening the lamps; At least one support portion having the lamp holder and having a curvature; A protrusion formed on the support to prevent sagging on a plurality of optical sheets; And Lamp fixing guide characterized in that it comprises at least one fixing for fixing the support. The method of claim 1, A protrusion formed on an upper portion of the lamp holder to prevent detachment of the lamp; A buffer portion that buffers a lower portion of the support portion corresponding to the lamp holder; And  Lamp fixing guide further comprises a complementary layer for replenishing the step between the fixing portion and the support. The method according to claim 1 or 2, The lamp holder, the support, the protrusion, the fixing portion, the protrusion, the buffer and the complement layer is a lamp fixing guide, characterized in that formed integrally or assembled. The method of claim 3, wherein The lamp holder, the support, the protrusion, the fixing portion, the protrusion, the buffer portion and the complementary layer is formed of a reflective material or the reflective material is applied to the lamp fixing guide, characterized in that for reflecting the light from the lamp. The method of claim 3, wherein The lamp holder, the support portion, the protrusion, the fixing portion, the protrusion, the buffer portion and the supplementary layer is a lamp fixing guide, characterized in that formed of an elastic material. The method of claim 5, wherein The elastically thin material is PET (Polyethylene Terephthalate) or fluorinated carbon polymer polytetrafluoroethylene (PTFE), characterized in that the lamp fixing guide. The method of claim 1, The end of the projection is a lamp fixing guide, characterized in that the conical shape of the end round to prevent damage to the optical sheet. A plurality of lamps having first and second electrodes; A bottom cover for storing the plurality of lamps; And And a lamp fixing guide provided in the bottom cover to fix the plurality of lamps. A liquid crystal panel which displays an image by adjusting light transmittance; And a backlight unit of claim 8 for irradiating light to the liquid crystal panel.

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