WO2010013870A1

WO2010013870A1 - Direct-lighting type back-light apparatus, power connecting apparatus and cover-bottom frame thereof

Info

Publication number: WO2010013870A1
Application number: PCT/KR2008/007430
Authority: WO
Inventors: Hee-Jong Yoo
Original assignee: Heesung Electronics Co., Ltd.
Priority date: 2008-07-29
Filing date: 2008-12-16
Publication date: 2010-02-04

Abstract

The present invention provides a direct-lighting type backlight apparatus, and a power connecting apparatus and cover bottom frame thereof. The power connecting apparatus of a direct-lighting type backlight apparatus according to the present invention includes a support plate where a lamp external electrode supporting hook for supporting both end portions of a lamp is provided at a one side, and a reflection part for reflecting light radiated from the lamp is provided at another side, and a grip electrode comprising a holder coupled with the lamp external electrode supporting hook to supply an external power supply source through an external electrode of the lamp which is connected. According to the present invention, the reflection part is integrally provided at the support plate to efficiently reflect light radiated from the lamp, improving light uniformity. The holder of the grip electrode is securely coupled with the lamp external electrode supporting hook, preventing noise due to vibration of the lamp. The holder of the grip electrode is disposed between the lamp external electrode supporting hook and the external electrode of the lamp, preventing the lamp external electrode supporting hook from aging and decreasing the temperature of a lamp electrode.

Description

DIRECT-LIGHTING TYPE BACK-LIGHT APPARATUS, POWER CONNECTING APPARATUS AND COVER-BOTTOM

FRAME THEREOF

Technical Field

[1] The present invention relates to a direct- lighting type backlight apparatus, and a power connecting apparatus and cover bottom frame thereof, and more particularly, to a direct-lighting backlight apparatus, and a power connecting apparatus and cover bottom frame thereof, which improve light uniformity and have an advanced power connecting structure. Background Art

[2] Recently, due to the development of information society, display device requirements are increasing in various ways. Consequently, various flat type display devices, for example, liquid crystal displays (LCD), plasma display panels (PDP), electro luminescent displays (ELD) and vacuum fluorescent displays (VFD), have been developed and used.

[3] The LCD has superior image quality and lightness, thinness and low-consumption power features, and is thus widely used as a portable flat display device. The LCD is applied as monitors of laptop and desktop computers, television (TV) monitors and the like.

[4] However, because the LCD cannot autonomously emit light, and require a separate external light source for realizing a high-quality picture, the LCD includes a backlight apparatus, in addition to a guide panel (for example, a liquid crystal display panel).

[5] In general, the backlight apparatus of the LCD is classified into an edge-lighting type backlight apparatus and a direct-lighting type backlight apparatus, according to how a light source is disposed. Herein, cylindrical fluorescent lamps - such as Cold Cathode Fluorescent Lamp (CCFL), Hot Cathode Fluorescent Lamp (HCFL) and External Electrode Fluorescent Lamp (EEFL)) - and Light Emitting Diode (LED) devices and an Electro Luminescence (EL) devices are used as light sources.

[6] Since the edge-lighting type backlight apparatus is relatively thin, they are mainly applied in the LCD for portable communication equipment, in order to thin thickness.

[7] Since the direct-lighting type backlight apparatus have high light efficiency, it is mainly applied in the LCD with large screens such as laptop computer monitors and TV monitors. Particularly, flat display devices such as television monitors and computers that use the LCD and a corresponding backlight apparatus is gradually being enlarged, thereby increasing the number of uses for the direct-lighting type backlight apparatus. The backlight apparatus is thus being developed in various forms.

[8] In a large backlight apparatus, a fluorescent lamp is widely used as a light source, and may be categorized into EEFLs that include an electrode (which is disposed outside the lamp) for connecting a power supply source to an Internal Electrode Fluorescent Lamp (IEFL) that includes an electrode which is disposed inside the lamp.

[9] FIG. 1 is a perspective view illustrating the disassembly of a related art direct- lighting type backlight apparatus. FIG. 2 is a perspective view illustrating the disassembly of a power connecting apparatus and a side support in FIG. 1. FIG. 3 is a perspective view illustrating the side support which is coupled with a cover bottom in FIG. 2.

[10] Referring to FIGS. 1 to 3, the related art direct- lighting type backlight apparatus includes a cover bottom 1, a support plate 5, a side support 6, an optical plate 7, a plurality of optical sheets 8, and a guide panel 9. The support plate 5 is disposed inside the cover bottom 1. A lamp external electrode support rib 3 of plastic for supporting both end portions of a lamp 2 is disposed at the one side of the support plate 5, and a stopper 4 connected to the end of the external electrode 2a of the lamp 2 is disposed at the other side of the support plate 5 in order to supply an external power supply source to the lamp 2. The side support 6 covers the support plate 5. The optical plate 7 is supported by the top of the side support 6 for diffusing and uniformizing light from the lamp 2. The optical sheets 8 are stacked on the optical plate 7. The guide panel 9 is coupled with the cover bottom 1.

[11] The external electrode 2a is provided at both sides of the lamp 2. Components associated with the external electrode 2a are also arranged at both sides of the lamp 2, and relevant elements are laterally symmetrical. Hereinafter, only one side of each element, therefore, will be illustrated and described, whereas the other side of each element will be omitted.

[12] The related art direct- lighting type backlight apparatus compensates the loss of light occurring in the side of the lamp 2 and separately includes the side support 6 in the side of the support plate 5 for fixing the above-described optical components, reducing assembility and increasing cost.

[13] In the related art direct- lighting type backlight apparatus, moreover, the outer portion of a screen is darker than the center portion of the screen in brightness, degrading light uniformity.

Disclosure of Invention Technical Problem

[14] The present invention has been made in an effort to solve the above-described problems. An object of the present invention is to provide a direct-lighting type backlight apparatus, and a power connecting apparatus and cover bottom frame thereof, which integrally provide a plurality of reflection parts on a support plate, leading to the enhancement of assembility, the decrease of cost and the improvement of light uniformity.

[15] Another object of the present invention is to provide a direct- lighting type backlight apparatus, and a power connecting apparatus and cover bottom frame thereof, which securely couple the holder of a grip electrode with a lamp external electrode supporting hook, thereby preventing noise due to vibration of a lamp. Technical Solution

[16] To achieve the objects, the present invention provides a power connecting apparatus of a direct-lighting type backlight apparatus including: a support plate where a lamp external electrode supporting hook for supporting both end portions of a lamp is provided at a one side, and a reflection part for reflecting light radiated from the lamp is provided at another side; and a grip electrode comprising a holder coupled with the lamp external electrode supporting hook to supply an external power supply source through an external electrode of the lamp which is connected.

[17] The lamp external electrode supporting hook and the reflection part are integrally provided at the support plate.

[18] The reflection part is provided in a polyhedron structure.

[19] An optical plate support surface for supporting an optical plate is provided on a top of the reflection part, an optical sheet fixing bar for fixing an optical sheet is integrally provided at an end portion of the support plate, a first catching protrusion is provided at both sides of a top of the optical sheet fixing bar, and a second catching protrusion is provided at a center of the top.

[20] The holder is provided in a dual structure where the external electrode of the lamp is connected to an inner side of the holder and an outer side of the holder is connected to the lamp external electrode supporting hook, and an end portion of an upper portion of the holder is flexibly caught in a catching jaw which is provided inside the lamp external electrode supporting hook.

[21] A direct- lighting type backlight apparatus according to another embodiment includes the power connecting apparatus.

[22] A cover bottom frame of a direct- lighting type backlight apparatus according to another embodiment includes: a support plate where a lamp external electrode supporting hook for supporting both end portions of a lamp, a reflection part for reflecting light radiated from the lamp to an inside of a backlight and an optical sheet fixing bar for fixing an optical sheet are provided; a reflection plate where the support plate is symmetrically coupled with both end portions, a guide lamp for supporting the lamp is provided at an upper side, and a support protrusion for supporting an optical plate is provided at the upper side; and a light leakage prevention wall provided along an outer edge of the reflection plate and the support plate for preventing light radiated from the lamp from being leaked to an outside, wherein the support plate, the reflection plate and the light leakage prevention wall are integrally provided at the cover bottom frame.

[23] The cross-sectional surface of the reflection plate forms a curved surface, or the reflection plate protrudes upward to form a polyhedron structure.

[24] A direct-lighting type backlight apparatus according to another embodiment includes the cover bottom frame.

Advantageous Effects

[25] According to the present invention, as described above, a plurality of reflection parts are integrally provided on a support plate, resulting in the enhancement of assembility and the decrease of cost. The present invention, moreover, efficiently reflects light radiated from a lamp, thereby improving light uniformity.

[26] Moreover, the present invention securely couples the holder of a grip electrode with a lamp external electrode supporting hook, and thus can prevent noise due to vibration of a lamp.

[27] In addition, the present invention disposes the holder of the grip electrode between the lamp external electrode supporting hook and the external electrode of the lamp in a dual structure where the external electrode of the lamp is connected to the inner side of the holder and the outer side of the holder is connected to the lamp external electrode supporting hook, and thus can prevent the lamp external electrode supporting hook from aging and reduce the temperature of a lamp electrode portion. Brief Description of Drawings

[28] FIG. 1 is a perspective view illustrating the disassembly of a related art direct- lighting type backlight apparatus.

[29] FIG. 2 is a perspective view illustrating the disassembly of a power connecting apparatus and a side support in FIG. 1.

[30] FIG. 3 is a perspective view illustrating the side support which is coupled with a cover bottom in FIG. 2.

[31] FIG. 4 is a perspective view illustrating a direct- lighting type backlight apparatus according to an embodiment of the present invention.

[32] FIG. 5 is a perspective view illustrating the support plate and grip electrode of a power connecting apparatus in FIG. 4.

[33] FIG. 6 is an enlarged view illustrating a main part of FIG. 5.

[34] FIGS. 7 and 8 are perspective views illustrating the other modified embodiments of a reflection part in FIG. 5. [35] FIG. 9 is a perspective view illustrating an optical plate attached to an optical plate support surface in FIG. 6. [36] FIG. 10 is a perspective view illustrating the operation of first and second catching protrusions in FIG. 6. [37] FIG. 11 is a perspective view illustrating the coupling of a lamp external electrode supporting hook and a grip electrode in FIG. 4. [38] FIGS. 12 and 13 are cross-sectional views illustrating the coupling process of the lamp external electrode supporting hook and the grip electrode in FIG. 11. [39] FIG. 14 is a perspective view illustrating another embodiment of the lamp external electrode supporting hook and the grip electrode. [40] FIG. 15 is a perspective view illustrating the coupling of the lamp external electrode supporting hook and the grip electrode in FIG. 14. [41] FIGS. 16 and 17 are cross-sectional views illustrating the coupling process of the lamp external electrode supporting hook and the grip electrode in FIG. 15. [42] FIG. 18 is a perspective view illustrating a direct- lighting type backlight apparatus according to another embodiment.

[43] FIG. 19 is a perspective view illustrating a cover bottom frame in FIG. 18.

[44] FIG. 20 is a perspective view illustrating a light leakage prevention wall in FIG. 19.

[45] FIG. 21 is a cross-sectional view illustrating a reflection plate in FIG. 19.

[46] DESCRIPTION OF THE SYMBOLS IN MAIN PORTIONS OF THE

DRAWINGS>

[47] 10: cover bottom, cover bottom frame

[48] 30: optical sheet

[49] 31: catching hole

[50] 40: guide panel

[51] 110: support plate

[52] 111: lamp external electrode supporting hook

[53] 112: catching jaw

[54] 113: reflection part

[55] 114: optical plate support surface

[56] 115: stopper

[57] 117: optical sheet fixing bar

[58] 118: first catching protrusion

[59] 119: second catching protrusion

[60] 120: grip electrode

[61] 121: holder

[62] 130: reflection plate [63] 131: guide lamp

[64] 132: support protrusion

[65] 140: light leakage prevention wall

[66] 141: coupling means

[67] 211a: fixing groove portion

[68] 21 Ib: catching jaw portion

[69] 221a: fixing protrusion portion

[70] 221b: catching protrusion portion

Best Mode for Carrying out the Invention

[71] Hereinafter, a direct- lighting type backlight apparatus and a power connecting apparatus thereof according to preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[72] FIG. 4 is a perspective view illustrating a direct- lighting type backlight apparatus according to an embodiment of the present invention. FIG. 5 is a perspective view illustrating the support plate and grip electrode of a power connecting apparatus in FIG.

4. FIG. 6 is an enlarged view illustrating a main part of FIG. 5. FIGS. 7 and 8 are perspective views illustrating the other modified embodiments of a reflection part in FIG.

5. FIG. 9 is a perspective view illustrating an optical plate attached to an optical plate support surface in FIG. 6. FIG. 10 is a perspective view illustrating the operation of first and second catching protrusions in FIG. 6.

[73] Referring to FIGS. 4 to 10, a direct-lighting type backlight apparatus according to an embodiment of the present invention includes a cover bottom 10, a support plate 110, a grip electrode 120, an optical plate 20, a plurality of optical sheets 30, and a guide panel 40. The support plate 110 is disposed inside the cover bottom 10. A lamp external electrode supporting hook 111 for supporting the both end portions of the lamp 2 is provided at the one side of the support plate 110, and a reflection part 113 for reflecting light radiated from the lamp 2 is provided at the other side of the support plate 110. The grip electrode 120 includes a holder 121 coupled with the lamp external electrode supporting hook 111 in order to supply an external power supply source to the lamp 2 through the external electrode of the lamp 2 which is connected to it. The optical plate 20 is supported by the top of the reflection part 113 for diffusing and uni- formizing light from the lamp 2. The optical sheets 30 are stacked on the optical plate 20. The guide panel 40 is coupled with the cover bottom 10.

[74] Moreover, a power connecting apparatus according to an embodiment of the present invention includes a support plate 110, and a grip electrode 120. The lamp external electrode supporting hook 111 for supporting the both end portions of the lamp 2 is provided at the one side of the support plate 110, and the reflection part 113 for re- fleeting light radiated from the lamp 2 is provided at the other side of the support plate

110. The grip electrode 120 includes the holder 121 coupled with the lamp external electrode supporting hook 111 in order to supply the external power supply source to the lamp 2 through the external electrode of the lamp 2 which is connected to it. [75] More specifically, the support plate 110 is fixed and disposed at the cover bottom 10 by a coupling means, and is a component where the grip electrode 120 for supporting the both end portions of the lamp 2 and supplying a power supply source to the lamp 2 is disposed. [76] A plurality of pairs of lamp external electrode supporting hooks 111 on the top of the support plate 110 are provided to face each other at a certain distance. The plurality of pairs of lamp external electrode supporting hooks 111 are arranged spaced apart along the length direction of the support plate 110. [77] The stopper 115 which supports the end of the lamp 2 to suppress the movement of the lamp 2 is provided at a position adjacent to the lamp external electrode supporting hook 111. [78] The lamp external electrode supporting hook 111 is formed of a plastic material, and the grip electrode 120 is formed by pressing of a metal material. [79] The reflection part 113 reflects light, which is radiated from the lamp 2, to the guide panel 40. A plurality of reflection parts 113 are arranged spaced apart along the length direction of the support plate 110. The reflection part 113 may be provided in a triangular pyramid structure, a rectangular pyramid structure shown in FIG. 7, or a curved- surface shape shown in FIG. 8. [80] The lamp external electrode supporting hook 111 and the reflection part 113 may be provided as a component independent of the support plate 110, and may be provided to be integrated with the support plate 110. [81] A case, where the lamp external electrode supporting hook 111 and the reflection part 113 are integrally provided, is more efficient in stiffness than a case where they are provided as independent components. [82] Referring to FIGS. 6, 9 and 10, an optical plate support surface 114 for supporting the outer portion of the optical plate 20 is provided on the top of the reflection part

113. [83] An optical sheet fixing bar 117, which horizontally fixes the optical sheets 30 disposed on the top of the optical plate 20, is integrally provided at the end portion of the support plate 110. [84] A first catching protrusion 118 may be provided at the both sides of the top of the optical sheet fixing bar 117, and a second catching protrusion 119 may be provided at the center of the top of the optical sheet fixing bar 117. [85] A catching hole 31 is provided at the outer side of the optical sheet 30 so as to correspond to the second catching protrusion 119. The forward, rearward and lateral movement of the optical sheet 30 is effectively prevented by the first and second catching protrusions 118 and 119.

[86] FIG. 11 is a perspective view illustrating the coupling of the lamp external electrode supporting hook and the grip electrode in FIG. 4. FIGS. 12 and 13 are cross-sectional views illustrating the coupling process of the lamp external electrode supporting hook and the grip electrode in FIG. 11.

[87] Referring to FIGS. 11 to 13, the grip electrode 120 is connected to the external electrode 2a of the lamp 2 and thereby supplies an external power supply source. The holder 121 of the grip electrode 120 is flexibly inserted in the lamp external electrode supporting hook 111, and is provided in a structure where the end of the upper portion of the holder 121 is flexibly caught in the catching jaw 112 internal to the lamp external electrode supporting hook 111.

[88] In the coupling structure of the lamp external electrode supporting hook 111 and the grip electrode 120, when the lamp 2 is inserted into the inside of the holder 121 of the grip electrode 120, the holder 121 opens outward to both sides and thereby elastic deformation is made. At this point, the lamp 2 is inserted into the inside of the holder 121 and the holder 121 is sprung back to an original position, thereby securely fixing the lamp 2 inside the holder 121.

[89] FIG. 14 is a perspective view illustrating another embodiment of the lamp external electrode supporting hook and the grip electrode. FIG. 15 is a perspective view illustrating the coupling of the lamp external electrode supporting hook and the grip electrode in FIG. 14. FIGS. 16 and 17 are cross-sectional views illustrating the coupling process of the lamp external electrode supporting hook and the grip electrode in FIG. 15.

[90] Referring to FIGS. 14 to 17, a lamp external electrode supporting hook 211 according to another embodiment includes a fixing groove portion 211a and a catching jaw portion 21 Ib. The fixing groove portion 21 Ia is provided at the center of the lamp external electrode supporting hook 211, and the catching jaw portion 21 Ib is provided at the both sides of the fixing groove portion 211a.

[91] The holder 221 of a grip electrode 220 includes a fixing protrusion portion 221a and a catching protrusion portion 221b. The fixing protrusion portion 221a is provided at the center of the holder 221 so as to be inserted in the fixing groove portion 211a, and the catching protrusion portion 221b is provided at the both sides of the fixing protrusion portion 221a so as to be caught in the catching jaw portion 21 Ib.

[92] In the coupling of the lamp external electrode supporting hook and the grip electrode according to another embodiment, when the holder 221 is inserted between the lamp external electrode supporting hook 211, elastic deformation is made in the lamp external electrode supporting hook 211 and thereby the lamp external electrode supporting hook 211 opens outward. [93] At this point, the fixing protrusion portion 221a is inserted in the fixing groove portion 211a and simultaneously the catching protrusion portion 221b is caught in the catching jaw portion 21 Ib, and thus, the holder 221 is securely coupled with the lamp external electrode supporting hook 211. [94] The operation of the direct- lighting type backlight apparatus and a power connecting apparatus thereof will be described below. [95] When a power supply source is supplied to the direct-lighting type backlight apparatus, the lamp 2 radiates light through the holder 121 of the grip electrode 120 and the external electrode 2a of the lamp 2 which is connected to the holder 121. [96] The light radiated from the lamp 2 is reflected to the optical plate 20 and the optical sheets 30 by the reflection part 113. The reflection part 113 suitably compensates the loss of light occurring in the side surface of the lamp 2, leading to the improvement of light uniformity. [97] Referring to FIGS. 6, 9 and 10, as described above, the outer portion of the optical plate 20 is supported by the optical plate supporting surface 114 of the reflection part

113. [98] The forward, rearward and lateral movement of the optical sheet 30 is effectively prevented by the first and second catching protrusions 118 and 119 of the optical sheet fixing bar 117. [99] The holder 121 of the grip electrode 120 may be securely fixed at the lamp external electrode supporting hook 211. [100] According to the present invention, the reflection parts 113 is integrally provided at the support plate 110, leading to the enhancement of assembility and the decrease of cost. Moreover, light radiated from the lamp 2 is efficiently reflected, improving light uniformity. [101] Furthermore, the holder 121 of the grip electrode 120 is securely coupled with the lamp external electrode supporting hook 111, thereby preventing noise due to vibration of the lamp 2. [102] In addition, the holder 121 of the grip electrode 120 is disposed between the lamp external electrode supporting hook 111 and the external electrode 2a of the lamp 2, and thus can prevent the lamp external electrode supporting hook 111 from aging and reduce the temperature of a lamp electrode. [103] FIG. 18 is a perspective view illustrating a direct- lighting type backlight apparatus according to another embodiment. FIG. 19 is a perspective view illustrating a cover bottom frame in FIG. 18. FIG. 20 is a perspective view illustrating a light leakage prevention wall in FIG. 19. FIG. 21 is a cross-sectional view illustrating a reflection plate in FIG. 19.

[104] Referring to FIGS. 18 to 21, a backlight apparatus according to another embodiment includes the support plate 110, a reflection plate 130, a light leakage prevention wall 140, the grip electrode 120, the optical plate 20, the plurality of optical sheets 30, and the guide panel 40. The lamp external electrode supporting hook 111 for supporting the both end portions of the lamp 2 is provided at the one side of the support plate 110, and the reflection part 113 for reflecting light radiated from the lamp 2 is provided at the other side of the support plate 110. The support plate 110 is symmetrically coupled with the both end portions of the reflection plate 130. A guide lamp 131 for supporting the lamp 2 and a support protrusion 132 for supporting the optical plate 20 and the optical sheet 30 are provided at the upper side of the reflection plate 130. The light leakage prevention wall 140 is provided along the outer edge of the reflection plate 130 and the support plate 110 for preventing the outward leakage of light radiated from the lamp 2. The grip electrode 120 includes the holder 121 coupled with the lamp external electrode supporting hook 111 in order to supply an external power supply source to the lamp 2 through the external electrode of the lamp 2 which is connected to it. The optical plate 20 is supported by the top of the reflection part 113 for diffusing and uni- formizing the light from the lamp 2. The optical sheets 30 are stacked on the optical plate 20.

[105] That is, as illustrated in the accompanying drawings, the direct- lighting type backlight apparatus according to another embodiment removes a separate cover bottom, and provides a cover bottom frame 10 where the support plate 110, the reflection plate 130 and the light leakage prevention wall 40 are integrally provided.

[106] The support plate 110 and the grip electrode 120 have the same structure as that of embodiments disclosed in FIGS. 4 to 17. Hereinafter, the structures of the reflection plate 130 and the light leakage prevention wall 140, therefore, will be described in detail.

[107] The reflection plate 130 connects a pair of corresponding support plates 110 to the lower side thereof and simultaneously reflects light, which is radiated from the lamp 2 to the lower side, to the front surface of the upper side thereof, thereby increasing brightness.

[108] Moreover, the reflection plate 130 is provided in a flat type as a quadrangle shape of panel. However, as illustrated in FIG. 21, the cross-sectional surface of the reflection plate 130 is provided in a curvature projecting upward or is formed in a polyhedron structure for increasing reflection efficiency. Such a structure directs light, which is radiated to a lower side, to an upper side and simultaneously diffuses the light in various directions, resulting in the increase of brightness and the improvement of brightness uniformity. [109] The guide lamp 131 for supporting a fluorescent lamp is provided at the upper side of the reflection plate 130, and the support protrusion 132 for supporting the optical plate 20 and the optical sheet 30 is provided in plurality. When the long bar shape of lamp 2 is coupled, a center portion sags downward. The guide lamp 131 prevents the center portion from sagging in order for the lamp 2 to be securely coupled. One or more the guide lamp 131 is provided for each of the lamps 2. The support protrusion 132 is for preventing a sag phenomenon by load when the optical plate 20 or the optical sheet 30 is stacked. Such a support protrusion 132 protrudes to the top of the reflection plate 130 and is provided in plurality.

[110] The light leakage prevention wall 140 is for preventing light (which is radiated from the lamp 2) from being leaked to the outside of the side surface of the backlight apparatus, and forms a wall along the outer edge of the reflection plate 130 and the support plate 110. The light leakage prevention wall 140 shields beforehand light capable of being leaked to the outside of a side surface, and thus can improve brightness and uniformity at the neighborhood of the power connecting apparatus and the effective region of the backlight apparatus.

[I l l] Moreover, a coupling means 141 provided at the outer wall of the light leakage prevention wall 140 is for securely coupling the guide panel 40 when the backlight apparatus is assembled, and is provided in plurality. The coupling means 141 may be provided in various shapes such as a protrusion, a groove and a hole which are typically used as a coupling means. The coupling means is provided in a structure corresponding to the coupling means of the guide panel 40.

[112] The light leakage prevention wall 140 prevents the leakage of light and the cover bottom frame 10 may be directly coupled with the guide panel 40. Accordingly, the backlight apparatus according to embodiments of the present invention does not require a separate cover bottom (reference number 1 in FIG. 1) that the related art uses, and thus, can have a simple structure and improve assembility.

[113] The support plate 110 may be provided to be integrated with the reflection plate 130, the light leakage prevention wall 140, the guide lamp 131 and the support protrusion as resin. The lamp external electrode supporting hook 111 and the reflection part 113 may also be provided to be integrated with the support 110.

[114] As described above, the backlight apparatus has been exemplified as preferred embodiments of the present invention. However, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention. Thus, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims

[1] A power connecting apparatus of a direct- lighting type backlight apparatus, the power connecting apparatus comprising: a support plate where a lamp external electrode supporting hook for supporting both end portions of a lamp is provided at a one side, and a reflection part for reflecting light radiated from the lamp is provided at another side; and a grip electrode comprising a holder coupled with the lamp external electrode supporting hook to supply an external power supply source through an external electrode of the lamp which is connected.

[2] The power connecting apparatus of claim 1, wherein the lamp external electrode supporting hook and the reflection part are integrally provided at the support plate.

[3] The power connecting apparatus of claim 1 or 2, wherein the reflection part is provided in a polyhedron structure.

[4] The power connecting apparatus of claim 1 or 2, wherein: an optical plate support surface for supporting an optical plate is provided on a top of the reflection part, an optical sheet fixing bar for fixing an optical sheet is integrally provided at an end portion of the support plate, a first catching protrusion is provided at both sides of a top of the optical sheet fixing bar, and a second catching protrusion is provided at a center of the top.

[5] The power connecting apparatus of claim 1 or 2, wherein: the holder is provided in a dual structure where the external electrode of the lamp is connected to an inner side of the holder and an outer side of the holder is connected to the lamp external electrode supporting hook, and an end portion of an upper portion of the holder is flexibly caught in a catching jaw which is provided inside the lamp external electrode supporting hook.

[6] A direct-lighting type backlight apparatus, comprising a power connecting apparatus of any one of claims 1 to 5.

[7] A cover bottom frame of a direct-lighting type backlight apparatus, the cover bottom frame comprising: a support plate where a lamp external electrode supporting hook for supporting both end portions of a lamp, a reflection part for reflecting light radiated from the lamp to an inside of a backlight and an optical sheet fixing bar for fixing an optical sheet are provided; a reflection plate where the support plate is symmetrically coupled with both end portions, a guide lamp for supporting the lamp is provided at an upper side, and a support protrusion for supporting an optical plate is provided at the upper side; and a light leakage prevention wall provided along an outer edge of the reflection plate and the support plate for preventing light radiated from the lamp from being leaked to an outside, wherein the support plate, the reflection plate and the light leakage prevention wall are integrally provided at the cover bottom frame.

[8] The cover bottom frame of claim 7, wherein a cross-sectional surface of the reflection plate forms a curved surface, or the reflection plate protrudes upward to form a polyhedron structure.

[9] A direct-lighting type backlight apparatus, comprising a cover bottom frame of claim 7 or 8.