KR101383998B1 - Fixing member for light source, back light assembly having the same, and display device having the back light assembly - Google Patents

Abstract

A light source fixing member, a backlight assembly having the same, and a display device having the same are disclosed. The display device includes a light source fixing member including a light source for generating light, a body for fixing the light source, a holder having a contact area reducing portion interposed between the body and the light source, and reducing a contact area of the light source body, and a fixing portion protruding from the holder; And an assembly including an accommodating container accommodating the light source and the light source fixing member and an optical member for improving optical characteristics of light generated from the light source, and a display panel disposed on the optical member to display an image. There is an effect of increasing the brightness and uniformity of the light generated by the light source by the light source fixing member.

Point contact projection, lamp, backlight assembly, holder, display

Description

A light source fixing member, a backlight assembly having the same, and a display device having the same {FIXING MEMBER FOR LIGHT SOURCE, BACK LIGHT ASSEMBLY HAVING THE SAME, AND DISPLAY DEVICE HAVING THE BACK LIGHT ASSEMBLY}

1 is a cross-sectional view of a light source fixing member according to an embodiment of the present invention.

2 is a cross-sectional view of the light source fixing member according to the second embodiment of the present invention.

3 is a cross-sectional view taken along line II ′ of FIG. 2.

4 is a cross-sectional view of a light source fixing member according to a third embodiment of the present invention.

5 is a cross-sectional view of a light source fixing member according to a fourth embodiment of the present invention.

6 is an exploded cross-sectional view of a backlight assembly according to an exemplary embodiment of the present invention.

7 is an exploded cross-sectional view illustrating a display device according to an exemplary embodiment of the present invention.

The present invention relates to a light source fixing member, a backlight assembly having the same, and a display device having the same. More particularly, the present invention relates to a light source fixing member having an improved brightness and uniformity of light, a backlight assembly having the same, and a display device having the same.

Recently, a display device for displaying data processed by an information processing device as an image has been developed.

Representative devices include liquid crystal display devices (LCDs), organic light emitting devices (OLEDs), plasma display panels (PDPs), and the like.

Among these, the liquid crystal display includes a display panel including liquid crystal. Since the liquid crystal included in the display panel cannot generate light by itself, the liquid crystal display may include a back light assembly that provides light to the display panel.

The backlight assembly includes a light source and optical members for improving brightness and brightness uniformity of light generated from the light source.

Examples of light sources used in the backlight assembly include light emitting diodes (LEDs), cold cathode fluorescent lamps (CCFL), hot cathode fluorescent lamps (HCFL) and flat fluorescent lamps. , FFL).

Examples of the optical member that improves the brightness and uniformity of the light generated from the light source include a light guide panel (LGP), a diffusion plate, a diffusion sheet, a prism sheet, and the like.

In recent years, as the screen size of a liquid crystal display device increases, the length of a light source mounted on the backlight assembly, for example, a cold cathode ray tube lamp, increases, and the number of lamps also increases.

For this reason, when the length of the light source is increased, deflection of the light source may occur due to the weight of the light source, so that both ends of the light source and the middle portion of the light source are fixed by the fixing member.

Accordingly, there is a problem that the luminance of the light generated from the light source is lowered as a whole.

One object of the present invention is to provide a light source fixing member for increasing the brightness of the light generated from the light source and the brightness uniformity of the light.

Another object of the present invention is to provide a backlight assembly including the light source fixing member.

Another object of the present invention is to provide a display device having the backlight assembly.

A light source fixing member for realizing one object of the present invention is to fix the holder and the holder having a body for fixing the light source for generating light and a contact area reducing portion interposed between the light source and the body to reduce the contact area And a fixing portion protruding from the body.

Another embodiment of the present invention provides a backlight assembly for fixing a holder and a holder having a light source for generating light, a body for fixing the light source, and a contact area reducing portion interposed between the light source and the body to reduce a contact area. In order to include a light source fixing member including a fixing portion protruding from the body, a receiving container for receiving the light source and the light source fixing member and an optical member for improving the optical characteristics of the light generated from the light source.

According to another aspect of the present invention, a display device includes a light source for generating light, a body for fixing the light source, and a contact area reducing part interposed between the body and the light source to reduce the contact area between the light source and the body. A holder, a light source fixing member including a fixing part protruding from the body to fix the holder, a storage container accommodating the light source and the light source fixing member, and an optical member for improving optical characteristics of light generated from the light source. And a display panel disposed on the backlight assembly to display an image using the light.

Although a light source fixing member, a backlight assembly having the same, and a display device having the same according to embodiments of the present invention are described in detail with reference to the accompanying drawings, the present invention is not limited to the following embodiments. Those skilled in the art will be able to implement the present invention in various other forms without departing from the spirit of the present invention.

Light source fixing member ( Light fixing member )

Example  One

1 is a cross-sectional view showing a light source fixing member according to a first embodiment of the present invention.

Referring to FIG. 1, the light source fixing member 2 fixes the light source 1 at a designated position.

The light source 1 may be a cold cathode ray tube lamp and a hot cathode ray tube lamp such as an external electrode cold cathode ray tube lamp, an internal electrode cold cathode ray tube lamp.

The light source fixing member 2 includes a holder 20 for fixing the light source 1 and a fixing part 23 connected to the holder 20 to fix the light source fixing member 2 to the storage container.

The holder 20 includes a body 21 for fixing the light source 1 and a contact area reducing portion 22 for reducing the contact area between the light source 1.

The body 21 and the contact area reducing portion 22 are integrally formed.

The body 21 fixing the light source 1 has a ring shape in which part is cut to be suitable for the light source 1 to be inserted, a round shape in which part is cut to be suitable for the light source 1 to be inserted, and the light source 1. It may have a variety of shapes such as a V-shape in which a portion is cut to be suitable to be inserted, and a rectangular shape in which a portion is cut to be suitable to be inserted into the light source 1.

A contact area reducing portion 22 for reducing the area in contact with the light source 1 is interposed between the light source 1 and the body 21.

When the contact area of the light source 1 and the body 21 is reduced by the contact area reducing portion 22, the heat transferred from the light source 1 to the light source fixing member 2 is significantly reduced. As a result, the temperature change in the part where the light source 1 and the contact area reducing part 22 contact is greatly reduced. Therefore, it is possible to prevent the luminance decrease and the luminance unevenness in the portion of the light source 1 in contact with the body 21.

The holder 20 includes a cutout 24. The cutout 24 not only allows the light source 1 to be easily assembled to the holder 20 but also increases the brightness and brightness uniformity of the light generated by the light source 1. This is because the path of light is not obstructed by the body 21.

The fixing part 23 is connected to the body 21. The fixing part 23 fixes the holder 22 to the connecting part 27.

The connection part 27 connects the fixing part 23, the support part 28 for supporting the optical member, and the like, and the fastening part 29 for fastening the light source fixing member 2 to the storage container. The connection part 27 may have a shape of a plate, a rod, or the like. The connecting portion 27 is horizontally attached to the storage container in the shape of a plate. One connection part 27 may connect a plurality of fixing parts 23, support parts 28, and fastening parts 29.

The fastening part 29 is attached to the connection part 27. The fastening part may be fastened to the storage container by using a bolt and a nut.

The holder 22, the fixing part 23, the connecting part 27, the support part 28, and the fastening part 29 may be integrally formed.

The fixing part 23 may fix the holder 20 directly to the storage container.

Example  2

2 is a cross-sectional view showing a light source fixing member according to a second embodiment of the present invention.

3 is a cross-sectional view taken along the line II ′ of FIG. 2.

The light source fixing member according to the second embodiment of the present invention is substantially the same as the first embodiment described above except for the contact area reducing portion. Therefore, the same components and the same reference numerals will be given to the same components.

2 and 3, the contact area reducing unit 22 is a line contact protrusion 221. In the second embodiment, the cross section of the line contact protrusion 221 is triangular. The cross-section of the line contact protrusion 221 may be a semicircle. When the contact area reducing portion 22 is the line contact protrusion 221, the area where the light source 1 and the body 21 contact is reduced.

When the contact areas of the light source 1 and the line contact protrusion 221 are reduced by the line contact protrusion 221, the heat transferred from the light source 1 to the light source fixing member 2 is significantly reduced. As a result, the temperature change in the part where the light source 1 and the line contact protrusion 221 contact is greatly reduced. Therefore, the luminance and luminance uniformity at the portion of the light source 1 in contact with the body 21 may be increased.

Example  3

4 is a cross-sectional view showing a light source fixing member according to a third embodiment of the present invention.

The light source fixing member according to the third embodiment of the present invention is substantially the same as the second embodiment described above except for the contact area reducing portion. Therefore, the same components and the same reference numerals will be given to the same components.

The contact area reduction part 22 is a point contact protrusion 222 contacting the light source 1 in a point shape. The contact area of the light source 1 and the body 21 is minimized by forming the contact area reducing portion 22 on the body 21 in a point shape.

When the contact area of the light source 1 and the point contact protrusion 222 is reduced by the point contact protrusion 222, the heat transferred from the light source 1 to the light source fixing member 2 is significantly reduced, and as a result The temperature change in the part where the light source 1 and the point contact protrusion 222 contact is greatly reduced. Therefore, the luminance and luminance uniformity in the portion of the light source 1 in contact with the body 21 can be increased.

The number of point contact protrusions 222 may be at least one. When the number of the point contact protrusions 222 is large, the point contact protrusions 222 may be arranged at equal intervals on the body 21. The three point contact protrusions 222 may be arranged at equal intervals on the body 21. For example, when the three point contact protrusions 222 are disposed at equal intervals on the body 21, the light source 1 is not only firmly fixed by the point contact protrusions 222, but also the body 21. And the contact area of the light source 1 can be greatly reduced.

Example  4

5 is a plan view showing a light source fixing member according to a fourth embodiment of the present invention.

The light source fixing member according to the fourth embodiment of the present invention is substantially the same as the third embodiment described above except for the contact area reducing portion and the body. Therefore, the same components and the same reference numerals will be given to the same components.

Referring to FIG. 5, the holder 20 is interposed between a round body 211 for fixing the light source 1 to a designated position, and is interposed between the light source 1 and the round body 211 to reduce the contact area. One point contact protrusion 222, the cut-out portion 24 so that the light source 1 can be easily assembled to the light source fixing member 2 and the separation prevention portion disposed at the end 25 of the round-shaped body 211 (26).

The holder 20 fixes the light source 1 at a designated position. The round body 211 and the point contact protrusion 222 are integrally formed.

The round body 211 fixes the light source 1 at a designated position. The round shape body 211 allows the light source to be easily assembled to the light source fixing member. This is because, in the case of the round body 211, the length of the cutting part 24 may be larger than the diameter of the light source 1 with little force.

The contact area reducing portion 22 is interposed between the light source 1 and the round body 211. The contact area reduction part 22 is one point contact protrusion 222. The area where the light source 1 and the point contact protrusion 222 contact is reduced to a minimum.

When the contact area of the light source 1 and the round-shaped body 211 is reduced by the point contact protrusion 222, the heat transferred from the light source 1 to the light source fixing member 2 is reduced. As a result, the temperature change in the part where the light source 1 and the point contact protrusion 222 contact is greatly reduced. Therefore, it is possible to prevent the luminance decrease and the luminance non-uniformity in the portion of the light source 1 in contact with the round body 211.

When the holder 20 includes a cutout 24, the light source 1 is easily detached from the holder 20. The departure prevention part 26 prevents the light source 1 from leaving the holder 20. The departure prevention part 26 is disposed at the end 25 of the round body 211. The end 25 is located at the end of the round body 211. The departure prevention part 26 may be a rod-shaped protrusion.

The interval between each departure prevention part 26 is smaller than the diameter of the light source 1. The end of the separation prevention portion 26 is directed toward the center of the light source (1). This is because the light source 1 can be easily assembled to the light source fixing member 2. In addition, the light source 1 can be prevented from being separated from the holder 20 efficiently.

The fixing part 23 is connected to the round body 211.

Backlight assembly ( back light assembly )

Example  5

6 is an exploded cross-sectional view of a backlight assembly according to a fifth exemplary embodiment of the present invention.

Referring to FIG. 6, the backlight assembly 3 includes a light source 1 for generating light, a light source fixing member 2 for fixing the light source 1 to the storage container 4, a light source 1, and a light source fixing member ( A storage container 4 containing 2) and an optical member 5 for improving the characteristics of light generated by the light source 1 are included.

The light source 1 generates light. The light source 1 may have a cylindrical shape. The diameter of the light source 1 may be several mm to several tens of mm. The light source 1 may be a cold cathode ray tube lamp and a hot cathode ray tube lamp such as an external electrode cold cathode ray tube lamp, an internal electrode cold cathode ray tube lamp. In this embodiment, a plurality of light sources 1 are arranged in parallel with each other.

The light source fixing member 2 fixes the light sources 1 arranged in parallel in the storage container 4. The light source fixing member 2 includes a holder 20 for fixing the light source 1 to the storage container 4 and a fixing portion 23 for fixing the holder 20 to the storage container.

The holder 20 includes a body 21 for fixing the light source 1 to the storage container, and a contact area reducing portion 22 for reducing the contact area. The holder 20 fixes the light source 1 to the storage container. The holder 20 includes a cutout 24. The cutout 24 increases the luminance and luminance uniformity of the light generated by the light source 1. The cutting portion allows the light source 1 to be easily assembled to the light source fixing member 2.

The body 21 fixes the light source 1 to the storage container. The body 21 has a ring shape partially cut to fit the light source 1, a round shape partially cut to fit the light source 1, and a part suitable to insert the light source 1. It may have a shape such as a V-shaped cut.

A contact area reducing portion 22 for reducing the area in contact with the light source 1 is interposed between the light source 1 and the body.

When the contact area of the light source 1 and the body 21 is reduced by the contact area reducing portion 22, the heat transferred from the light source 1 to the light source fixing portion is reduced. As a result, the temperature change in the part where the light source 1 and the contact area reducing part 22 contact is greatly reduced. Therefore, it is possible to prevent the luminance decrease and the luminance unevenness in the portion of the light source 1 in contact with the body 21.

The fixing part 23 is connected to the body 22. The fixing part 23 fixes the holder 22 to the connecting part 27.

The connection part 27 connects the fixing part 23, the support part 28 for supporting the optical member 5, and the like, and the fastening part 29 for fastening the light source fixing member 2 to the storage container 4. The connection part 27 may have a shape of a plate, a rod, or the like. The connecting portion 27 is horizontally attached to the storage container 4 in the shape of a plate. One connection part 27 may connect a plurality of fixing parts 23, support parts 28, and fastening parts 29.

The fastening part 29 is attached to the connection part 27. The fastening part 29 may be fastened to the storage container 4 by using a bolt and a nut.

The holder 22, the fixing part 23, the connecting part 27, the support part 28, and the fastening part 29 may be integrally formed.

The fixing part 23 may fix the holder 20 directly to the storage container 4.

The storage container 4 accommodates the light source 1 and the light source fixing member 2. The storage container 4 includes side walls 41 and a bottom plate 42 connected to the side walls 41. In this embodiment, the storage container 4 is made of, for example, a metal plate or a synthetic resin material.

The bottom plate 42 includes a coupling part 43 that engages with the fixing part 23. The fixing part 23 may be connected to the coupling part 43 by a bolt and a nut. The bottom plate 42 may include a reflective sheet (not shown) that reflects light emitted from the light source 1.

The optical member 5 improves the optical characteristics of the light generated from the light source 1. The optical member 5 may include a diffusion sheet for diffusing light generated from the light source 1 and a prism sheet for condensing the light diffused in the diffusion sheet. The optical member 5 is disposed on the surface opposite to the reflector (not shown) based on the light source 1.

Display device )

Example  6

7 is an exploded cross-sectional view illustrating a display device according to a sixth embodiment of the present invention.

Referring to FIG. 7, the display device 6 includes a backlight assembly 3 and a display panel 7.

The backlight assembly 3 includes a light source 1 for generating light, a light source fixing member 2 for fixing the light source 1 to a storage container, and a storage container 4 for storing the light source 1 and the light source fixing member 2. ) And an optical member 5 for improving the optical characteristics of the light generated by the light source 1.

The light source 1 may have a cylindrical shape. The diameter can be several mm to several tens of mm. It may also be a cold cathode ray tube lamp or a hot cathode ray tube lamp. In this embodiment, a plurality of light sources 1 are arranged in parallel with each other.

The light source fixing member 2 fixes the light sources 1 arranged in parallel to the storage container 4. The light source fixing member 2 includes a holder 20 for fixing the light source 1 to the storage container, and a fixing part 23 for fixing the holder 22 to the storage container 4.

The holder 20 includes a body 21 for fixing the light source 1 to the storage container, a contact area reducing portion 22 and a cutting portion 24 for reducing the contact area.

The cutting part 24 allows the light source 1 to be easily assembled to the light source fixing member 2. The cutout 24 increases the luminance and luminance uniformity of the light generated by the light source 1.

The body 21 fixes the light source 1 to the storage container 4. The body 21 has a ring shape partially cut to fit the light source 1, a round shape partially cut to fit the light source 1, and a part suitable for inserting the light source 1. It may have a shape such as a V-shaped cut.

A contact area reducing portion 22 for reducing the contact area with the light source 1 is interposed between the light source 1 and the body 21.

When the contact area of the light source 1 and the contact area reduction part 22 is reduced by the contact area reduction part 22, the heat transmitted from the light source 1 to the light source fixing member 2 is reduced. As a result, the temperature change in the part where the light source 1 and the contact area reducing portion 22 contact is reduced. Therefore, it is possible to prevent the luminance decrease and the luminance unevenness in the portion of the light source 1 in contact with the body 21.

The fixing part 23 is connected to the body 22. The fixing part 23 fixes the holder 22 to the connecting part 27.

The connection part 27 connects the fixing part 23, the support part 28 for supporting the optical member 5, and the like, and the fastening part 29 for fastening the light source fixing member 2 to the storage container 4. The connection part 27 may have a shape of a plate, a rod, or the like. The connecting portion 27 is horizontally attached to the storage container 4 in the shape of a plate. One connection part 27 may connect a plurality of fixing parts 23, support parts 28, and fastening parts 29.

The fastening part 29 is attached to the connection part 27. The fastening part 29 may be fastened to the storage container 4 by using a bolt and a nut.

The holder 22, the fixing part 23, the connecting part 27, the support part 28, and the fastening part 29 may be integrally formed.

The fixing part 23 may fix the holder 20 directly to the storage container 4.

The storage container 4 accommodates a light source 1 for generating light and a light source fixing member 2 for fixing the light source 1 to the storage container. The storage container 4 includes side walls 41 and a bottom plate 42 connected to the side walls 41. In this embodiment, the storage container 4 is made of, for example, a metal plate or a synthetic resin material.

In the present embodiment, the bottom plate 42 includes a coupling part 43 for engaging with the fixing part 23. The fixing part 23 may be connected to the coupling part 43 by a bolt and a nut. The bottom plate 42 may include a reflective sheet (not shown) that reflects light emitted from the light source 1.

The optical member 5 improves the characteristics of the light generated from the light source 1. The optical member 5 may include a diffusion sheet for diffusing light generated from the light source 1, a prism sheet for collecting light diffused in the diffusion sheet, and the like. The optical member 5 is disposed on a surface opposite to the reflector (not shown) based on the light source 1.

The display panel 7 includes a TFT substrate 71, a color filter substrate 72, and a liquid crystal layer 73. The display panel 7 is disposed on a surface opposite to the light source 1 with respect to the optical member 5. The TFT substrate 71 has a thin film transistor and a pixel electrode connected to the thin film transistor. The color filter substrate 72 faces the TFT substrate 71. The color filter substrate 72 includes a color filter (not shown). The liquid crystal layer 73 adjusts the amount of light transmitted. The liquid crystal layer 73 is disposed between the TFT substrate 71 and the color filter substrate 72.

As described above, the light source fixing member according to the present invention minimizes the area where the light source and the contact area reducing part contact each other. Therefore, it is possible to prevent the luminance decrease and the luminance non-uniformity in the portion of the light source in contact with the light source fixing member.

In the detailed description of the present invention described above with reference to the 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 and It will be appreciated that various modifications and variations can be made in the present invention without departing from the scope of the art.

Claims (30)

A holder having a body for fixing a light source for generating light and a contact area reducing portion interposed between the light source and the body to reduce a contact area; And A fixing portion protruding from the holder, The holder further includes a cutout portion to facilitate assembly of the light source and the holder, and a release preventing portion disposed at an end of the holder to prevent the light source from being separated from the holder, wherein the end of the release preventing portion is formed of a light source. Light source fixing member, characterized in that toward the center. delete The light source fixing member according to claim 1, wherein the fixing part and the holder are provided in plurality, and further comprising a connection part connecting the plurality of fixing parts. The light source fixing member of claim 3, further comprising a fastening part connected to the connection part. The light source fixing member of claim 3, further comprising a support part protruding from the connection part. The light source fixing member according to claim 1, wherein the contact area reducing part is a protrusion which is in line contact. The light source fixing member according to claim 1, wherein the contact area reducing part is a protrusion in point contact with the light source. 8. The light source fixing member according to claim 7, wherein the point contacting protrusions are arranged at equal intervals on the body. The light source fixing member according to claim 1, wherein the body has a round shape or a V shape. delete A light source for generating light; A light source fixing member including a body fixing the light source, a holder having a contact area reducing part interposed between the light source and the body to reduce a contact area between the light source and the body, and a fixing part protruding from the holder; A storage container accommodating the light source and the light source fixing member; And It includes an optical member for improving the optical characteristics of the light generated from the light source, The holder further includes a cutout portion to facilitate assembly of the light source and the holder, and an anti-separation portion disposed at an end of the holder to prevent the light source from being separated from the holder, wherein the end of the anti-separation portion is formed of a light source. Backlight assembly, characterized in that the center. delete The backlight assembly of claim 11, wherein the light source fixing member includes a plurality of the fixing part and the holder, and a connection part connecting the plurality of fixing parts. The backlight assembly of claim 13, wherein the light source fixing member further comprises a fastening part connected to the connection part. The backlight assembly of claim 13, wherein the light source fixing member further comprises a support part protruding from the connection part. The backlight assembly of claim 11, wherein the contact area reducing part is a protrusion in line contact with the light source. The backlight assembly of claim 11, wherein the contact area reducing part is a protrusion in point contact with the light source. 18. The backlight assembly of claim 17, wherein the point-contacting protrusions are disposed at equal intervals on the body. The backlight assembly of claim 11, wherein the body has a round shape or a V shape. delete A light source including a light source for generating light, a body for fixing the light source and a holder having a contact area reducing portion interposed between the body and the light source to reduce the contact area between the light source and the body, and a fixing portion protruding from the holder A backlight assembly including a fixing member, a light receiving container containing the light source and the light source fixing member, and an optical member for improving optical characteristics of light generated from the light source; And A display panel disposed on the optical member to display an image by using the light; The holder further includes a cutout portion to facilitate assembly of the light source and the holder, and a release preventing portion disposed at an end of the holder to prevent the light source from being separated from the holder, wherein the end of the release preventing portion is formed of a light source. A display device, characterized in that it faces the center. delete The display device of claim 21, wherein the light source fixing member further comprises a plurality of the fixing part and the holder, and a connection part connecting the plurality of fixing parts. The display device of claim 23, wherein the light source fixing member further comprises a fastening part connected to the connection part. The display device of claim 23, wherein the light source fixing member further comprises a support part protruding from the connection part. The display device of claim 21, wherein the contact area reducing part is a protrusion in line contact with the light source. The display device of claim 21, wherein the contact area reducing part is a protrusion in point contact with the light source. 28. The display device according to claim 27, wherein the point-contacting protrusions are disposed on the body at equal intervals. The display device of claim 21, wherein the body has a round shape or a V shape. delete

Images