WO2006059464A1 - ランプ保持具及びそれを用いた表示装置用照明装置及びそれを用いた表示装置及び表示装置用照明装置を用いた液晶表示装置 - Google Patents
ランプ保持具及びそれを用いた表示装置用照明装置及びそれを用いた表示装置及び表示装置用照明装置を用いた液晶表示装置 Download PDFInfo
- Publication number
- WO2006059464A1 WO2006059464A1 PCT/JP2005/020475 JP2005020475W WO2006059464A1 WO 2006059464 A1 WO2006059464 A1 WO 2006059464A1 JP 2005020475 W JP2005020475 W JP 2005020475W WO 2006059464 A1 WO2006059464 A1 WO 2006059464A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mounting plate
- display device
- base
- contact
- lamp holder
- Prior art date
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims description 34
- 238000005286 illumination Methods 0.000 title claims description 14
- 239000011347 resin Substances 0.000 claims 1
- 229920005989 resin Polymers 0.000 claims 1
- 230000002093 peripheral effect Effects 0.000 abstract description 20
- 238000009434 installation Methods 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 8
- 229920003002 synthetic resin Polymers 0.000 description 8
- 239000000057 synthetic resin Substances 0.000 description 8
- 230000003287 optical effect Effects 0.000 description 7
- 239000011521 glass Substances 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 239000004417 polycarbonate Substances 0.000 description 3
- 229920000515 polycarbonate Polymers 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 241000257465 Echinoidea Species 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V19/00—Fastening of light sources or lamp holders
- F21V19/0075—Fastening of light sources or lamp holders of tubular light sources, e.g. ring-shaped fluorescent light sources
- F21V19/008—Fastening of light sources or lamp holders of tubular light sources, e.g. ring-shaped fluorescent light sources of straight tubular light sources, e.g. straight fluorescent tubes, soffit lamps
- F21V19/009—Fastening of light sources or lamp holders of tubular light sources, e.g. ring-shaped fluorescent light sources of straight tubular light sources, e.g. straight fluorescent tubes, soffit lamps the support means engaging the vessel of the source
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V19/00—Fastening of light sources or lamp holders
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133608—Direct backlight including particular frames or supporting means
Definitions
- the present invention relates to a lamp holder, a display device illumination device using the lamp holder, a display device using the same, and a liquid crystal display device using the display device illumination device.
- a liquid crystal panel used in a liquid crystal display device such as a liquid crystal television does not emit light, and therefore requires a backlight device as an external lamp.
- This backlight device is installed on the back side of the liquid crystal panel.
- the base is made of metal and the surface on the liquid crystal panel side is open, and a large number of lamps are housed in the base as lamps. Equipped with a cold cathode tube and a large number of optical members (such as a diffusion sheet) that are arranged in the opening of the base and efficiently emit light emitted from the cold cathode tube toward the liquid crystal panel.
- a lamp clip is provided for holding the cold-cathode tube that forms
- Patent Document 1 As an example of the lamp clip as described above, one described in Patent Document 1 below is known.
- This is made of synthetic resin and has a mounting plate that is arranged along the inner surface of the base, and a locking portion that protrudes from the mounting plate toward the base and is inserted into the mounting hole of the base and can be locked to the periphery thereof. And a lamp holding portion that protrudes from the mounting plate to the opposite side of the locking portion and can be held so as to surround the peripheral surface of the cold cathode tube.
- the locking portion is composed of a base portion protruding from the mounting plate and a locking protrusion protruding sideways from the tip portion of the base portion, and the locking protrusion reaching the back side of the mounting hole is located on the back side of the mounting hole. It can be locked to the periphery.
- Patent Document 1 Japanese Patent Laid-Open No. 2001-210126
- the present invention has been completed based on the above situation, and an object thereof is to suppress rattling.
- a lamp holder for attaching a lamp to a base member, and includes a mounting plate addressed to the base member, and a mounting A locking portion that protrudes from the plate to the base member side and is inserted into a mounting hole provided in the base member and can be locked to the periphery on the back side of the mounting plate.
- a mounting plate addressed to the base member includes a mounting plate addressed to the base member, and a mounting A locking portion that protrudes from the plate to the base member side and is inserted into a mounting hole provided in the base member and can be locked to the periphery on the back side of the mounting plate.
- At least two locations across the locking portion, or at least one location between multiple locking portions protrudes toward the base member and can contact the base member during mounting. It has a feature in that it has a configuration in which an abutment portion is provided.
- the locking portion is attached. It can be kept locked to the peripheral edge on the back side of the hole, and thus it is possible to suppress the occurrence of rattling with the base member.
- FIG. 1 is an exploded perspective view schematically showing a liquid crystal display device according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional view schematically showing a liquid crystal display device
- FIG. 9 is a bottom view showing a lamp clip according to (1) of another embodiment of the present invention.
- FIG. 10 is a bottom view showing a lamp clip according to (2) of another embodiment of the present invention.
- Garden 11A Bottom view showing a lamp clip according to (3) of another embodiment of the present invention.
- Garden 11B Front view showing a state in which the lamp clip according to (3) of another embodiment of the present invention is attached to the base.
- Garden 12A Bottom view showing a lamp clip according to (4) of another embodiment of the present invention.
- Garden 12B Front view showing a state in which the lamp clip according to (4) of another embodiment of the present invention is attached to the base.
- Garden 13A Bottom view showing a lamp clip according to (5) of another embodiment of the present invention.
- Garden 13B Front view showing a state in which the lamp clip according to (5) of another embodiment of the present invention is attached to the base.
- Liquid crystal display device display device
- Backlight device (lighting device for display device)
- Lamp clip (lamp holder)
- FIGS. An embodiment of the present invention will be described with reference to FIGS.
- a lamp clip 20 used in the backlight device 12 of the liquid crystal display device 10 is illustrated.
- the vertical direction will be described with reference to each drawing, and the horizontal direction will be described with reference to FIG.
- the liquid crystal display device 10 roughly includes a rectangular liquid crystal panel 11 and a backlight device 12 as an external light source, which are integrally formed by a bezel 13 or the like. It is supposed to be retained.
- the liquid crystal panel 11 which is a display panel is configured such that a pair of glass substrates are bonded together with a predetermined gap therebetween, and liquid crystal is sealed between the two glass substrates.
- One glass substrate has switching elements (for example, TFTs) connected to mutually orthogonal source lines and gate lines, and the other glass substrate has R, G, B pixel electrodes in a matrix. Is provided.
- the backlight device 12 includes a rectangular metal base 14 having an open top surface and a plurality of optical members 15 (in order from the lower side in the figure) that are attached so as to cover the opening of the base 14.
- rubber for example, silicon rubber
- the cold cathode tube 17 has an elongated tubular shape in one direction, and a large number (in FIG. 1), the length direction (axis direction) of which coincides with the long side direction of the base 14. 18) It is housed in the base 14 in a state of being parallel to each other.
- the outer diameter of the cold cathode tube 17 is, for example, about 3 or 4 mm, but may increase or decrease within the tolerance due to manufacturing errors.
- the lamp clip 20 is made of a synthetic resin (for example, polycarbonate), and includes a mounting plate 21 addressed to the bottom wall surface of the base 14, and the mounting plate 21 has a locking portion 22 and a lamp holding portion. 23 and pin 24 are provided.
- a plurality of lamp clips 20 can be attached to the base 14 so that each cold cathode tube 17 can be held at two or three different locations in the length direction.
- the entire surface of the lamp clip 20 is colored, for example, in white so that the light emitted from the cold cathode tube 17 is less likely to be blocked or reflected.
- the mounting plate 21 is formed in an elongated rectangular shape along the short side direction of the base 14 (the direction perpendicular to the length direction of the cold cathode tube 17). As shown in FIG. 3, a locking portion for fixing the lamp clip 20 to the base 14 is provided on the lower surface 21a of the mounting plate 21 (the surface facing the base 14 and the surface to be attached to the base 14). 22 is provided projecting downward (base 14 side). A pair of locking portions 22 are provided on the mounting plate 21, and both locking portions 22 are substantially equal from both ends of the mounting plate 21 in the long side direction of the mounting plate 21 as shown in FIGS. 3 and 5. It is arranged at a position separated by a distance, and the short side direction of the mounting plate 21 is both arranged at the center position.
- the locking portion 22 has a base portion 25 suspended from the lower surface 21a of the mounting plate 21, and extends obliquely upward from the distal end portion of the base portion 25 (the mounting plate 21 side away from the base portion 25). And a pair of elastic locking pieces 26.
- the base 25 has a rectangular shape in bottom view along the short side of the mounting plate 21 (FIG. 5). Both elastic locking pieces 26 are formed in a cantilever shape connected to both side surfaces on the long side at the distal end portion of the base portion 25, and are elastic along the direction of contact with and separating from the base portion 25 with the connecting portion as a fulcrum. It can be deformed. As shown in FIG.
- the locking portion 22 can be inserted into each mounting hole 14a provided at a corresponding position in the base 14, and is formed at the distal end portion of the elastic locking piece 26.
- the stepped portion can be locked to the peripheral edge on the back side of the mounting hole 14a, and this is the locking surface 26a for the base 14 (FIG. 8).
- the locking surface 26a of the elastic locking piece 26 and the lower surface 21a of the mounting plate 21 are arranged to face each other while being spaced apart from each other.
- the distance between 26a is set to be slightly larger than the thickness of the base 14 in consideration of manufacturing errors of the lamp clip 20. Specifically, the distance between both sides 21a and 26a is the manufacturing error of the lamp clip 20. However, if the distance between both surfaces 21a and 26a is the minimum value of the tolerance range, it will be the same as the thickness of the base 14 plate. Thus, mounting on the base 14 is allowed.
- the middle portion of the cold cathode tube 17 excluding both longitudinal ends is held.
- a lamp holding portion 23 is provided to project upward. As shown in FIGS. 3 and 4, the lamp holding portion 23 is positioned equidistant from both end positions in the long side direction of the mounting plate 21 (specifically, a position outside the locking portion 22), and There are a total of three at approximately the center position. Each lamp holding portion 23 is arranged at the center position in the short side direction of the mounting plate 21.
- the lamp holding portion 23 can surround the entire peripheral surface of the cold cathode tube 17 as a whole, and has an end that opens upward to allow the cold cathode tube 17 to be attached and detached. It is formed in a ring shape.
- the lamp holding portion 23 includes a pair of arm portions 27 whose base portions are connected to each other, and the both arm portions 27 are suspended from the upper surface of the mounting plate 21.
- the cold cathode tube 17 can be held at a position lifted from the mounting plate 21 by a predetermined height.
- Both arm portions 27 have a cantilever shape in which the base portion protrudes outward (opposite to each other) in a substantially horizontal direction, and then extends inward and obliquely upward (direction approaching each other). Formed and symmetrical to each other.
- the distance between the two ends of the arms 27 is narrower than the minimum outer diameter of the tolerance range of the cold cathode tube 17, and the cold cathode tube 17 is allowed to be attached and detached through this gap. At the same time, it can be elastically opened and deformed as it is attached or detached (elastically deformable while widening the gap between the tips).
- both guide portions 29 are provided to protrude outward and obliquely upward so as to be separated from each other.
- the inner surfaces of both guide portions 29 are both guide surfaces 29a formed in a taper shape, and the distance between both guide surfaces 29a gradually increases as it goes upward. In other words, since the reception opening for the cold cathode tube 17 in the lamp holding portion 23 gradually increases toward the front side in the mounting direction, the cold cathode tube 17 can be easily attached.
- Both guide surfaces 29a are formed so as to be substantially perpendicular to each other.
- the inner peripheral surfaces of both arm portions 27 have three loose portions formed at the root portion and near the tip portions. Strong arcuate surfaces 30, 31 are provided, and an equilateral triangle is formed by connecting the virtual tangents of the arcuate surfaces 30, 31 to each other. Each of the arc surfaces 30, 31 is formed more gently than the peripheral surface of the cold cathode tube 17, in other words, the curvature of each of the arc surfaces 30, 31 is smaller than the curvature of the peripheral surface of the cold cathode tube 17. Is set. Of the arcuate surfaces 30 and 31, both arcuate surfaces 30 on the tip side of both arm portions 27 are point contact portions 32 that can make point contact with the cold cathode tube 17 in the circumferential direction.
- the center of the arcuate surface 31 on the side is a point contact portion 33 that can make point contact with the cold cathode tube 17 in the circumferential direction.
- the two point contact portions 32 on the distal end side of the both arm portions 27 can press the cold cathode tube 17 upward, that is, from the direction in which the cold cathode tube 17 is removed. Since the arc surface 31 at the base portion of both arm portions 27 is formed so that the central portion in the circumferential direction is deepest, it is possible to guide the cold cathode tube 17 to be mounted to the central position.
- the point contact portions 32 and 33 are positioned at the vertices of an isosceles triangle or an equilateral triangle, although depending on the thickness of the cold cathode tube 17 (see FIG. 8).
- the connecting portion between the arcuate surface 30 on the distal end side of the arm portion 27 and the guide surface 29a is a rounded shape.
- the lamp holding portion 23 is elastically opened and deformed slightly in the both arm portions 27 in the attached state.
- the point contact portions 32 and 33 are formed in such a size that they can be held without being rattled against the peripheral surface of the cold cathode tube 17 in contact with the tension.
- Recesses 34 are provided on the inner peripheral surfaces (opposite surfaces of the cold cathode tubes 17) of both arm portions 27, respectively. Specifically, the recess 34 is between the adjacent circular arc surfaces 30 and 31 of the inner peripheral surface of the arm portion 27 (between the tip portion and the root portion of the arm portion 27, that is, between the connecting portion with respect to the connecting portion 28). And is formed in an arc shape that is steeper than each of the circular arc surfaces 30, 31 (having a relatively large curvature and a relatively small curvature radius). The concave portion 34 is formed over the entire width of the arm portion 27, and is formed so as to be deeper in the central portion in the circumferential direction.
- the outer peripheral surface (the surface opposite to the surface facing the cold cathode tube 17) of the portion where the recess portion 34 of the arm portion 27 is provided is outside, that is, the arm portion 27 is recessed by the recess portion 34, that is, It is formed to bulge away from the cold cathode tube 17 so that the arm portion 27 is almost full length. It is formed so as to have a substantially uniform thickness throughout.
- the arm portion 27 is allowed to open and deform with the base portion of the portion provided with the recess 34 as a fulcrum, that is, the tip portion is allowed to be displaced in a direction away from the peripheral surface of the cold cathode tube 17. Has been.
- the elastic force of the arm portion 27, in other words, the operating force required to open and deform the arm portion 27 is reduced compared to a case where no recess is provided.
- the arm portion 27 has an extended surface distance (arm length) from the root portion to the tip portion which is a free end by the amount that the portion provided with the recess 34 bulges outward.
- a pin 24 that can come into contact with the optical member 15 is provided on the upper surface of the mounting plate 21 so as to protrude upward (in the same direction as the lamp holding portion 23).
- the pin 24 is formed in a substantially conical shape (tapered shape) with a rounded tip, and the optical member 15 can be supported by the tip.
- the height of the pin 24 is set to be about three times larger than the lamp holder 23.For example, when attaching the lamp clip 20 to the base 14, the operator grasps the pin 24 and works. It is possible to do.
- the pin 24 is arranged at an intermediate position between the leftmost lamp holding portion 23 and the central lamp holding portion 23 and at a position corresponding to the back side of the locking portion 22.
- the surface of the mounting plate 21 is arranged so as to overlap a part of the locking portion 22.
- the lower surface 21a of the mounting plate 21 (the surface facing the base 14) abuts against the upper surface of the base 14 (the surface facing the mounting plate 21) during mounting, as shown in FIG.
- Possible contact portions 35 and 36 are provided so as to protrude downward (to the base 14 side).
- the abutting portions 35 and 36 are provided at three locations, that is, the center position in the long side direction of the mounting plate 21 and the vicinity of both end positions.
- Each of the contact portions 35, 36 is formed in a shape having an arcuate outer surface in which the central portion is most bulged in the long side direction of the mounting plate 21 in other words, the cross-sectional shape is an arcuate shape.
- the contact portions 35 and 36 are respectively arranged at positions sandwiching the locking portion 22. Specifically, the contact portion 35 at the center and the contact portion 36 at the left end sandwich the locking portion 22 on the left side. However, the central abutment portion 35 and the right abutment portion 36 are disposed at two positions with the right locking portion 22 interposed therebetween.
- the central abutting portion 35 is arranged at the central position in the short side direction of the mounting plate 21 and can be brought into point contact with the base 14. It has a spherical crown shape.
- the abutting portions 35 are arranged side by side on the lower surface 21a of the mounting plate 21 2 It is disposed at an intermediate position between the two locking portions 22, is located behind the lamp holding portion 23 at the center on the upper surface side, and is located concentrically with the lamp holding portion 23.
- both abutting portions 36 are formed in a bowl shape extending in the short side direction of the mounting plate 21, and can be in line contact with the base 14 in the same direction. Both contact portions 36 have a length extending over the entire width of the mounting plate 21.
- the both abutting portions 36 are arranged on the mounting plate 21 at positions closer to the ends than the lamp holding portions 23 at both ends, and at positions equidistant from the both end positions of the mounting plate 21. In this way, on the lower surface 21a of the mounting plate 21, the contact portions 35, 36 are arranged at symmetrical positions and are formed in a symmetrical shape.
- the amount of protrusion of each contact portion 35, 36 from the mounting plate 21 is substantially the same, and is set based on an error that occurs in manufacturing the lamp clip 20. In other words, due to manufacturing errors, the distance between the locking surface 26a of the locking portion 22 and the lower surface 21a of the mounting plate 21 varies from product to product within a tolerance range.
- the amount of protrusion of 35 and 36 is slightly larger than the maximum value of the tolerance range of the above distance minus the thickness of the base 14, that is, the maximum clearance generated between the mounting plate 21 and the base 14 It is set to be. Therefore, when the lamp clip 20 is attached to the base 14, the distance between the locking surface 26 a of the locking portion 22 and the lower surface 21 a of the mounting plate 21 is within any tolerance range.
- the contact portions 35 and 36 are brought into contact with the upper surface of the base 14, and the mounting plate 21 is elastically deformed so as to bend using the portions provided with the contact portions 35 and 36 as fulcrums. It has become
- a positioning pin 37 that can be fitted into the positioning hole 14b provided in the base 14 is provided at the center in the length direction of the contact portion 36 at the left end. It has been. As described above, the locking portion 22 and the abutting portions 35 and 36 arranged on the back surface side (the surface facing the base 14) of the lamp clip 20 are symmetrically arranged, whereas the run side on the front surface side. Since the clamp holder 23 and the pin 24 are asymmetrically arranged, there is a concern that the lamp clip 20 may be attached to the base 14 in the reverse direction. However, this positioning pin 37 is fitted into the positioning hole 14b when the mounting plate 21 is in the correct orientation when the lamp clip 20 is attached to the base 14. It is inconsistent with that and can restrict installation, so you can prevent incorrect installation It ’s a sea urchin.
- the present embodiment has the structure as described above, and the operation thereof will be described. While the liquid crystal panel 11 is manufactured, the backlight device 12 is assembled. When assembling the backlight device 12, first, the work of attaching each lamp clip 20 to the base 14 is performed.
- both abutting portions 36 disposed on both ends of the mounting plate 21 are in line contact with the upper surface of the base 14 in the short side direction of the mounting plate 21. Therefore, although the mounting plate 21 is attached in a state of being partially lifted from the base 14 by the contact portions 35, 36, the floating portion of the mounting plate 21 is caused by a gap generated between the base 14 and the base 14. It is possible to suppress rattling (displacement) by inclining in the short side direction.
- each lamp clip 20 is attached to the base 14, the operation of attaching the cold cathode tube 17 is performed. As shown in FIG. 1, the cold-cathode tubes 17 are held by the lamp clips 20 in a state where two holders 18 are assembled together by attaching holders 18 to both ends thereof.
- both arm portions 27 use the root portion of the portion where the recess 34 is provided as a fulcrum.
- the cold cathode tube 17 is allowed to enter by elastically opening and deforming and widening the gap between the two end portions. Then, when the cold-cathode tube 17 passes between the tips of both arm portions 27, as shown by the imaginary line in FIG. 8, both arm portions 27 close to a predetermined position and the point contact portions 32, 33 are cooled.
- three cold cathode tubes 17 are supported.
- the thickness of the cold cathode tube 17 increases or decreases within a tolerance range due to manufacturing errors, since the concave portion 34 is provided on the opposite surface of the both arm portions 27 to the cold cathode tube 17, both arm portions 27 The resilience generated in the is reduced. Therefore, the relatively thin cold cathode tube 17 can be held without rattling, and the relatively thick cold cathode tube 17 can be attached and detached. In addition, the cold cathode tube 17 can be prevented from being pushed out in the disengagement direction by the repulsive force of the arm 27 in the holding state, that is, workability and holding performance can be improved. .
- the lamp holder 19 is attached, and the optical member 15 and the frame 16 are assembled to the base 14 in this order, whereby the knocklight device 12 is formed.
- the backlight device 12 and the liquid crystal panel 11 are integrally assembled by the bezel 13 to form the liquid crystal display device 10 (see FIG. 1).
- the lower surface 21a of the mounting plate 21 that faces the base 14 protrudes to the base 14 side at three positions sandwiching the locking portions 22.
- the two abutting portions 36 are arranged at a pair of both end positions in the long side direction of the mounting plate 21 formed in a rectangular shape, it is possible to better suppress the rattling of the mounting plate 21. can do.
- both the abutting portions 36 are formed so as to be able to make a line contact with the base 14 in the short side direction of the mounting plate 21 formed in a rectangular shape, the abutting portions are assumed to be the base. On the other hand, it is possible to better suppress the occurrence of rattling as compared with the case of point contact.
- the lamp clip 20 is made of a synthetic resin, the manufacturing becomes easy and the cost can be reduced.
- the lamp clip 20 itself may block or reflect the light emitted from the cold cathode tube 17 as compared with the case where the lamp clip is black. It becomes difficult. As a result, when the cold cathode tube 17 is turned on and the liquid crystal display device 10 is displayed, the pin 24 becomes difficult for the viewer to visually recognize (a reduction in luminance or the like is prevented). Therefore, the display performance of the liquid crystal display device 10 is improved.
- the contact portions 36 at both ends of the mounting plate 21 have a shape in line contact with the base 14 has been described.
- FIG. There are a total of four contact portions 36A at two end portions of the mounting plate 21 that are spaced apart from each other along the short side direction of the mounting plate 21. It is possible to suppress the rattling by tilting in the short side direction.
- the contact portion 36A has the same shape as that of the central contact portion 35 in FIG. 9, but can be changed as appropriate.
- the contact portion 35 at the center of the mounting plate 21 has a shape that makes point contact with the base 14 is shown.
- the portion 35B may be configured to extend along the short side direction of the mounting plate 21, and may be in line contact with the base 14 in the same direction. Further, the force of the contact portion 35B having the same shape as the contact portions 36 at both ends in FIG. 10 can be appropriately changed.
- the case where the contact portions 35 and 36 are provided at three locations on the mounting plate 21 has been described.
- Only one contact portion 35C may be provided at the position, that is, between the two locking portions 22.
- the mounting plate 21 can be warped with the contact portion 35C as a fulcrum.
- the force mounting plate 21 showing the contact portion 35C that makes point contact with the base 14 may be a contact portion that is in line contact with the mounting plate 21 in the short side direction.
- the lamp clip provided with only one locking portion 22D.
- the mounting plate 21 can be warped with both contact portions 36D as fulcrums.
- point contact is made with respect to the base 14.
- the abutting portion 36D is shown, the abutting portion may be in the form of line contact in the short side direction of the mounting plate 21.
- the abutting portions 35E may be provided at two locations sandwiched between the respective locking portions 22E, and the abutting portions 36E may be provided at two locations on both ends of the mounting plate 21 in the long side direction.
- the mounting plate 21 can be warped with the contact portions 35E and 36E as fulcrums.
- the contact portion 35E is in a point contact with the base 14.
- the contact portion 36E may be in line contact with the base 14 in the short side direction. It is good also as a form which carries out point contact with respect to.
- any one of the contact portions 35E and 36E can be omitted.
- the present invention is applicable to a lamp clip having four or more locking portions.
- the amount of protrusion of the abutting portions 35 and 36 from the mounting plate 21 is set to be larger than the maximum value of the clearance generated between the mounting plate 21 and the base 14.
- the protruding amount of the force contact portion showing the case can be set to the same level as the maximum clearance generated between the mounting plate 21 and the base 14, for example. Even in this case, rattling of the mounting plate 21 can be suppressed by the contact portion contacting the base 14.
- the diameter S of the contact portion 35 and the line width / line length of the contact portion 36 can be changed as appropriate, and the shape of the contact portions 35, 36 can be spherical.
- the crown shape is not limited to a bowl shape, and can be changed as appropriate.
- the arrangement positions of the contact portions 35 and 36 on the mounting plate 21 can be changed as appropriate. Further, it may be changed to an asymmetrical shape that does not need to be symmetrical on the back side of the mounting plate.
- the form of the locking part 22 may be such that, for example, the locking projection protrudes laterally from the tip of the base part suspended from the mounting plate as shown in the prior art.
- other changes can be made as appropriate.
- the shape of the mounting plate 21 is not limited to a rectangular shape but a square shape. A shape or a circular shape is also included in the present invention.
- the force shown in the backlight device 12 in which the lamp clip 20 is attached to the substantially box-shaped base 14, for example, the lamp clip 20 is attached to the plate-like base from which the peripheral wall is removed. are also included in the present invention.
- the lamp clip 20 is white, but it may be colorless and transparent, or may be translucent and milky white. In this way, the lamp clip 20 can easily transmit the light emitted from the cold cathode tube 17, and the situation where the light is blocked or reflected is further less likely to occur. Accordingly, when the cold cathode tube 17 is turned on to display the liquid crystal display device 10, the pin 24 becomes difficult for the viewer to visually recognize (a reduction in luminance or the like is prevented). The display performance is further improved. Further, the present invention also includes the lamp clip 20 having a color other than those described above.
- the case where polycarbonate is used as the lamp clip 20 as a synthetic resin material is shown, but other synthetic resin materials may be used.
- the material of the lamp clip 20 is not limited to a synthetic resin material, and other types of materials can be used. Even when a synthetic resin material other than polycarbonate or a material other than synthetic resin material is used, the color of the lamp clip 20 can be white, colorless and transparent, or translucent and milky white.
- the present invention can also be applied to a liquid crystal display device using a switching element other than a TFT. Further, the present invention can be applied to a liquid crystal display device for monochrome display in addition to a liquid crystal display device for color display.
- liquid crystal display device has been described in the above-described embodiment, the present invention is applicable to other display devices that use a backlight device in addition to the liquid crystal.
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Optics & Photonics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Planar Illumination Modules (AREA)
- Fastening Of Light Sources Or Lamp Holders (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
- Liquid Crystal (AREA)
Abstract
Description
Claims
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05803507A EP1801493B1 (en) | 2004-11-30 | 2005-11-08 | Lamp holder, illumination device for display device, using the lamp holder, display device using the display device, and liquid crystal display device using illumination device for display device |
DE602005014374T DE602005014374D1 (de) | 2004-11-30 | 2005-11-08 | Lampenhalter, beleuchtungsvorrichtung für eine anzeigevorrichtung mit dem lampenhalter, anzeigevorrichtung mit der anzeigevorrichtung und flüssigkristallanzeigevorrichtung mit der beleuchtungsvorrichtung für eine anzeigevorrichtung |
CN2005800268828A CN101002051B (zh) | 2004-11-30 | 2005-11-08 | 灯保持装置、显示装置用照明装置、显示装置和液晶显示装置 |
JP2006520459A JPWO2006059464A1 (ja) | 2004-11-30 | 2005-11-08 | ランプ保持具及びそれを用いた表示装置用照明装置及びそれを用いた表示装置及び表示装置用照明装置を用いた液晶表示装置 |
US11/560,259 US7540650B2 (en) | 2004-11-30 | 2006-11-15 | Lamp holding apparatus, lighting device for display device including same, display device including same and liquid crystal display device including lighting device for display device |
US12/427,091 US7658534B2 (en) | 2004-11-30 | 2009-04-21 | Lamp holding tool, lighting device for display device using the same, display device using the same and liquid crystal display device using lighting device for display device |
US12/642,036 US7909498B2 (en) | 2004-11-30 | 2009-12-18 | Lamp holding tool, lighting device for display device using the same, display device using the same and liquid crystal display device using lighting device for display device |
US13/025,189 US8038336B2 (en) | 2004-11-30 | 2011-02-11 | Lamp holding tool, lighting device for display device using the same, display device using the same and liquid crystal display device using lighting device for display device |
US13/251,477 US8376605B2 (en) | 2004-11-30 | 2011-10-03 | Lamp holding tool, lighting device for display device using the same, display device using the same and liquid crystal display device using lighting device for display device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-347324 | 2004-11-30 | ||
JP2004347324 | 2004-11-30 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/560,259 Continuation US7540650B2 (en) | 2004-11-30 | 2006-11-15 | Lamp holding apparatus, lighting device for display device including same, display device including same and liquid crystal display device including lighting device for display device |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006059464A1 true WO2006059464A1 (ja) | 2006-06-08 |
Family
ID=36564901
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/020475 WO2006059464A1 (ja) | 2004-11-30 | 2005-11-08 | ランプ保持具及びそれを用いた表示装置用照明装置及びそれを用いた表示装置及び表示装置用照明装置を用いた液晶表示装置 |
Country Status (7)
Country | Link |
---|---|
US (5) | US7540650B2 (ja) |
EP (1) | EP1801493B1 (ja) |
JP (2) | JPWO2006059464A1 (ja) |
KR (1) | KR100796888B1 (ja) |
CN (1) | CN101002051B (ja) |
DE (1) | DE602005014374D1 (ja) |
WO (1) | WO2006059464A1 (ja) |
Cited By (5)
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JP2008108627A (ja) * | 2006-10-26 | 2008-05-08 | Sharp Corp | クリップ及び光源装置 |
JP2009104978A (ja) * | 2007-10-25 | 2009-05-14 | Hitachi Displays Ltd | 液晶表示装置 |
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KR101310374B1 (ko) * | 2006-08-18 | 2013-09-23 | 엘지디스플레이 주식회사 | 백라이트 유닛 및 이를 구비하는 액정 표시장치 |
CN107407477A (zh) * | 2015-03-18 | 2017-11-28 | 夏普株式会社 | 照明装置和显示装置 |
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-
2005
- 2005-11-08 DE DE602005014374T patent/DE602005014374D1/de active Active
- 2005-11-08 WO PCT/JP2005/020475 patent/WO2006059464A1/ja active Application Filing
- 2005-11-08 JP JP2006520459A patent/JPWO2006059464A1/ja active Pending
- 2005-11-08 CN CN2005800268828A patent/CN101002051B/zh not_active Expired - Fee Related
- 2005-11-08 KR KR1020067027788A patent/KR100796888B1/ko not_active IP Right Cessation
- 2005-11-08 EP EP05803507A patent/EP1801493B1/en not_active Expired - Fee Related
-
2006
- 2006-11-15 US US11/560,259 patent/US7540650B2/en not_active Expired - Fee Related
-
2007
- 2007-04-23 JP JP2007113139A patent/JP2007207769A/ja active Pending
-
2009
- 2009-04-21 US US12/427,091 patent/US7658534B2/en not_active Expired - Fee Related
- 2009-12-18 US US12/642,036 patent/US7909498B2/en not_active Expired - Fee Related
-
2011
- 2011-02-11 US US13/025,189 patent/US8038336B2/en not_active Expired - Fee Related
- 2011-10-03 US US13/251,477 patent/US8376605B2/en not_active Expired - Fee Related
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Cited By (5)
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---|---|---|---|---|
KR101310374B1 (ko) * | 2006-08-18 | 2013-09-23 | 엘지디스플레이 주식회사 | 백라이트 유닛 및 이를 구비하는 액정 표시장치 |
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JP2009104978A (ja) * | 2007-10-25 | 2009-05-14 | Hitachi Displays Ltd | 液晶表示装置 |
JP5194033B2 (ja) * | 2008-01-22 | 2013-05-08 | シャープ株式会社 | 照明装置、表示装置及びテレビ受信装置 |
CN107407477A (zh) * | 2015-03-18 | 2017-11-28 | 夏普株式会社 | 照明装置和显示装置 |
Also Published As
Publication number | Publication date |
---|---|
US20110134357A1 (en) | 2011-06-09 |
US20090207587A1 (en) | 2009-08-20 |
US8038336B2 (en) | 2011-10-18 |
KR20070047252A (ko) | 2007-05-04 |
US20120262908A1 (en) | 2012-10-18 |
US7540650B2 (en) | 2009-06-02 |
JP2007207769A (ja) | 2007-08-16 |
DE602005014374D1 (de) | 2009-06-18 |
US8376605B2 (en) | 2013-02-19 |
US7658534B2 (en) | 2010-02-09 |
CN101002051B (zh) | 2012-05-30 |
US20100097787A1 (en) | 2010-04-22 |
US7909498B2 (en) | 2011-03-22 |
US20070070651A1 (en) | 2007-03-29 |
EP1801493B1 (en) | 2009-05-06 |
KR100796888B1 (ko) | 2008-01-22 |
EP1801493A4 (en) | 2008-02-20 |
JPWO2006059464A1 (ja) | 2008-06-05 |
EP1801493A1 (en) | 2007-06-27 |
CN101002051A (zh) | 2007-07-18 |
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