WO2010103705A1 - 照明装置、表示装置、及びテレビ受信装置 - Google Patents
照明装置、表示装置、及びテレビ受信装置 Download PDFInfo
- Publication number
- WO2010103705A1 WO2010103705A1 PCT/JP2009/070870 JP2009070870W WO2010103705A1 WO 2010103705 A1 WO2010103705 A1 WO 2010103705A1 JP 2009070870 W JP2009070870 W JP 2009070870W WO 2010103705 A1 WO2010103705 A1 WO 2010103705A1
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- WIPO (PCT)
- Prior art keywords
- chassis
- power supply
- insertion position
- inverter board
- supply board
- Prior art date
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Classifications
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- 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
- G02F1/133604—Direct backlight with lamps
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- 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
- G02F1/133612—Electrical details
Definitions
- the present invention relates to a lighting device, a display device, and a television receiver.
- a liquid crystal panel used in a liquid crystal display device such as a liquid crystal television does not emit light, and thus requires a separate backlight device as an illumination device.
- This backlight device is installed on the back side of the liquid crystal panel (on the opposite side of the display surface), and has a chassis with an open surface on the liquid crystal panel side and a number of lamps ( For example, a cold cathode tube) and an inverter unit capable of supplying power to each lamp.
- the thing described in the following patent document 1 is known as an example of the structure for electrically connecting an inverter unit and a lamp
- the lamp is arranged inside the front side of the chassis, while the inverter unit is arranged outside the back side of the chassis, and the lamp socket is attached to the chassis so as to penetrate inside and outside.
- the lamp is connected to the inner end of the lamp socket, whereas the inverter unit is connected to the outer end of the lamp socket.
- a guide part is provided outside the back side of the chassis, and when the inverter unit is attached to the chassis, the inverter unit is guided by the guide part.
- the inverter unit in order to connect the inverter unit to the lamp socket, the inverter unit is horizontally slid along the guide portion while keeping the inverter unit facing the rear surface of the chassis. It is configured to be inserted into the lamp socket.
- the inverter unit in the configuration of the liquid crystal display device, the inverter unit is guided in the in-plane direction of the chassis and in the direction away from the chassis, but is not guided in the direction approaching the rear surface of the chassis. Yes.
- various chip components are mounted on the surface of the inverter unit facing the chassis. If the inverter units are too close to the rear surface of the chassis and come into contact with each other, the inverter unit may be damaged.
- the present invention has been completed based on the above situation, and an object thereof is to prevent damage associated with the assembly of the chassis and the inverter board.
- an illumination device of the present invention is provided with a light source, a chassis that houses the light source, and the chassis on the side opposite to the light source, and supplies driving power to the light source.
- a power supply board, and a relay connector that is assembled to the chassis and relays power supply between the power supply board and the light source, and the power supply board is separated from the relay connector in a non-insertion position.
- an insertion position inserted into the relay connector and can move along the surface of the chassis, and the power supply board contacts the chassis at the non-insertion position or the insertion position.
- an access restriction boss for restricting the power supply board from approaching the chassis is provided.
- the power supply board To connect the power supply board to the relay connector, place the power supply board at the non-insertion position opposite to the light source with respect to the chassis, and move from the non-insertion position to the insertion position along the plate surface of the chassis.
- the power supply board is provided with an access restriction boss that restricts the power supply board from approaching the chassis. Accordingly, the power supply board is always kept at a predetermined distance from the chassis in the non-insertion position or the insertion position.
- various components mounted on the power supply board can be prevented from coming into contact with the chassis. It becomes possible to prevent damage to the power supply board and the chassis.
- the spherical member which can rotate can be attached to the front-end
- At least three of the access restriction bosses may be erected on the power supply board. According to such a configuration, since the power supply board and the chassis are kept separated from each other at at least three points, stable movement is possible when the power supply board is moved. Therefore, contact between the power supply board and the chassis can be avoided, and damage to both can be prevented.
- the power supply board may have a substantially rectangular shape in plan view, and the access restriction bosses may be erected at four corners of the power supply board.
- the power supply board has a substantially rectangular shape, the four corners are most easily in contact with the chassis. Therefore, by setting up the approach restriction bosses at the four corners, it is possible to more reliably prevent the contact between the power supply board and the chassis.
- the electrode supply substrate can be discharged through the access restriction boss.
- Various electronic components are mounted on the power supply board, and unintentional spontaneous discharge may occur in surrounding members (for example, a chassis). Therefore, by allowing discharge through the access restriction boss, unintended natural discharge can be suppressed.
- the chassis and the power supply board may be opposed to each other without any other member. In such a case, contact between the power supply board and the chassis is likely to cause damage, and thus the configuration of the present invention is preferably used.
- An insulating cover may be attached between the chassis and the power supply board. According to such a configuration, unintentional natural discharge from the power supply board to the chassis can be suppressed.
- a display device of the present invention includes the above-described lighting device and a display panel that performs display using light from the lighting device. According to such a display device, the illumination device that supplies light to the display panel is unlikely to be damaged due to the assembly, so that the manufacturing cost can be reduced and the operation reliability is also excellent. .
- a liquid crystal panel can be exemplified as the display panel.
- Such a display device can be applied as a liquid crystal display device to various uses such as a display of a television or a personal computer, and is particularly suitable for a large screen.
- the television receiver of this invention is provided with the said display apparatus. According to such a television receiver, it is possible to reduce the manufacturing cost and to provide a device having excellent operation reliability.
- FIG. 1 is an exploded perspective view showing a schematic configuration of a television receiver according to Embodiment 1 of the present invention.
- Sectional drawing which shows the cross-sectional structure along the long side direction of a liquid crystal display device Plan view of the chassis containing the cold cathode tubes
- Sectional drawing which shows the cross-sectional structure along the long side direction of the liquid crystal display device in the state which made the inverter board
- Sectional view showing the cross-sectional configuration of the relay connector
- Sectional view showing the configuration of the guide boss provided on the inverter board
- Enlarged bottom view of the main part with the inverter board in the non-insertion position 9 is a cross-sectional view taken along line AA in FIG.
- FIGS. 1 A first embodiment of the present invention will be described with reference to FIGS.
- the liquid crystal display device 10 is illustrated.
- a part of each drawing shows an X axis, a Y axis, and a Z axis, and each axis direction is drawn to be a direction shown in each drawing.
- the upper side shown in FIG. 2 is the front side (front side, light emission side)
- the lower side shown in FIG. 2 is the back side (back side, opposite to the light emission side).
- the television receiver TV includes a liquid crystal display device 10 (display device), front and back cabinets Ca and Cb that are accommodated so as to sandwich the liquid crystal display device 10, and a power source P. And a tuner T.
- the liquid crystal display device 10 has a horizontally long rectangular shape as a whole, and includes a liquid crystal panel 11 as a display panel and a backlight device 12 (illumination device) as an external light source, as shown in FIG. It is integrally held by a bezel 13 or the like having a shape.
- the liquid crystal panel 11 has a rectangular shape in plan view. As shown in FIG. 2, the pair of glass substrates 11a and 11b are bonded together with a predetermined gap therebetween, and between the glass substrates 11a and 11b. A liquid crystal layer (not shown) is enclosed.
- One glass substrate 11a is provided with a switching element (for example, TFT) connected to a source wiring and a gate wiring orthogonal to each other, a pixel electrode connected to the switching element, an alignment film, and the like.
- a switching element for example, TFT
- the glass substrate 11b is provided with a color filter in which colored portions such as R (red), G (green), and B (blue) are arranged in a predetermined arrangement, a counter electrode, and an alignment film.
- image data and various control signals necessary for displaying an image from a drive circuit substrate are supplied to the source wiring, the gate wiring, the counter electrode, and the like.
- polarizing plates 11c and 11d are disposed outside the glass substrates 11a and 11b, respectively.
- the backlight device 12 is a so-called direct-type backlight in which a light source is disposed directly under the back surface of the liquid crystal panel 11, and is open on the front side (light emission side, liquid crystal panel 11 side).
- the backlight device 12 includes an inverter board 20 (power supply board) disposed on the back side of the chassis 14 and a relay connector 21 that relays power supply between the inverter board 20 and the cold cathode tube 18. ing.
- the chassis 14 is made of metal such as aluminum, and includes a bottom plate 14a having a substantially rectangular shape in a plan view like the liquid crystal panel 11.
- the long side direction of the bottom plate 14a coincides with the X-axis direction of each drawing, and the short side direction coincides with the Y-axis direction.
- Connector insertion holes 14b through which the relay connector 21 can be inserted are formed through both ends of the bottom plate 14a in the long side direction.
- a plurality (number corresponding to the cold cathode tubes 18 and the relay connectors 21) of the connector insertion holes 14b are arranged in parallel along the Y-axis direction (the short side direction of the bottom plate 14a).
- the reflection sheet 15 is made of a synthetic resin exhibiting white with excellent light reflectivity and is laid so as to cover almost the entire inner surface of the chassis 14, and transmits light from the cold cathode tube 18 to the optical member 16 side. It has a function of reflecting to the (light emitting side).
- the reflection sheet 15 has a hole communicating with the connector insertion hole 14b.
- the optical member 16 has a rectangular shape in plan view like the bottom plate 14a of the chassis 14 and the liquid crystal panel 11, is made of a synthetic resin having translucency, and has a cold cathode tube 18 on the back side and a liquid crystal panel 11 on the front side. Intervene between.
- the optical member 16 is composed of, for example, a diffusion plate, a diffusion sheet, a lens sheet, and a brightness enhancement sheet in order from the back side, and emits light emitted from each cold cathode tube 18 that is a linear light source with uniform planar light. It has functions such as converting to.
- the frame 17 has a frame shape along the outer peripheral edge of the liquid crystal panel 11 and the optical member 16.
- the frame 17 is arranged on the front side of the optical member 16 and can sandwich the outer peripheral edge portion of the optical member 16 with the holder 19.
- the frame 17 can receive the liquid crystal panel 11 from the back side, and can hold the liquid crystal panel 11 with the bezel 13 disposed on the front side of the liquid crystal panel 11.
- the cold cathode tube 18 is a kind of linear light source (tubular light source), and as shown in FIG. 3, the axial direction of the cold cathode tube 18 is aligned with the long side direction (X-axis direction) of the chassis 14 in the chassis 14. A plurality of them are arranged along the short side direction (Y-axis direction) of the chassis 14 with their axes substantially parallel to each other and at a predetermined interval therebetween.
- linear light source tubular light source
- the cold cathode tube 18 is a kind of discharge tube, and as shown in FIG. 4, a pair of thin and long glass tubes 18a having a circular cross section sealed at both ends and sealed inside the both ends of the glass tube 18a. Electrode (not shown) and a pair of outer leads 18b projecting outward from both ends of the glass tube 18a.
- the glass tube 18a is filled with mercury or the like as a luminescent material (both phosphors are not shown) and the inner wall surface is coated with the phosphor.
- the outer lead 18b is made of a conductive metal and has an elongated, substantially cylindrical shape that protrudes outward (opposite to the electrode side) along the axial direction (X-axis direction) from the end of the glass tube 18a. The inner end thereof is connected to the electrode in the glass tube 18a, so that it has the same potential as the electrode.
- the holder 19 is made of a synthetic resin exhibiting white with excellent light reflectivity, and as shown in FIG. 2, the holder 19 has a substantially box shape extending along the short side direction of the chassis 14 and having an open back surface. ing. A pair of holders 19 are attached to both end portions of the chassis 14 in the long side direction so that the end portions (non-light emitting portions) of the cold cathode tubes 18 arranged in parallel at the same position can be collectively covered. It has become.
- the relay connector 21 is made of an insulating synthetic resin (for example, polybutylene terephthalate or nylon) and has a generally block shape, and a terminal fitting 24 accommodated in the housing 23. And is attached in a state of passing through the bottom plate 14a of the chassis 14.
- the portion of the housing 23 that is disposed in the chassis 14 is a light source receiving portion 23 a that receives the end of the cold cathode tube 18, whereas the portion that is disposed outside the chassis 14.
- Is a board receiving part 23b that receives the connector connecting part 20c of the inverter board 20.
- an arcuate groove portion along the end of the cold cathode tube 18 is formed.
- the board receiving portion 23b is provided with a board insertion opening 23c that opens toward the rear (inverter board 20 side) along the X-axis direction and opens toward the right side shown in FIG. 5 along the Y-axis direction. Yes.
- the housing 23 is directly held with respect to the chassis 14.
- the light source receiving portion 23a has a larger dimension in the Y-axis direction than the substrate receiving portion 23b, and the wide portion 23d can be engaged with the chassis 14 from the front side.
- the board receiving portion 23b is provided with a retaining protrusion 23e that can be engaged with the chassis 14 from the back side.
- the end of the terminal fitting 24 disposed in the light source receiving portion 23 a is a light source contact portion 24 a that is in contact with the outer lead 18 b of the cold cathode tube 18.
- the end portion disposed in the substrate receiving portion 23b is a substrate contact portion 24b that contacts the terminal portion 20d of the connector connecting portion 20c.
- the light source contact portion 24a and the substrate contact portion 24b have spring properties, respectively, and can be elastically contacted with the outer lead 18b and the terminal portion 20d.
- the output voltage output from the inverter board 20 can be input to the outer lead 18b and the electrode of the cold cathode tube 18 via the relay connector 21.
- the relay connectors 21 are arranged in a pair with respect to the chassis 14 at positions corresponding to both ends of the cold cathode tube 18, that is, at both ends in the long side direction of the bottom plate 14a, and in the short side direction (Y-axis) of the bottom plate 14a. Are arranged side by side (as many as the number of cold cathode tubes 18) along the direction (parallel direction of the cold cathode tubes 18) (see FIG. 6). The arrangement pitch of each relay connector 21 is substantially equal to the arrangement pitch of each cold cathode tube 18. The installation positions of the relay connectors 21 in the Y-axis direction are almost the same as the cold cathode tubes 18.
- FIG. 6 is a bottom view of the chassis to which the inverter board is attached
- FIG. 7 is a plan view showing a schematic configuration of the inverter board
- FIG. 8 is a cross-sectional view showing the configuration of guide bosses provided on the inverter board.
- the inverter board 20 is formed by forming a predetermined wiring pattern on a base material made of synthetic resin (for example, glass cloth base material epoxy resin or paper phenol) and mounting various electronic components. Specifically, as shown in FIG.
- a wiring pattern is formed on the front surface (surface on the chassis 14) of the inverter board 20, and lead components 20 a such as a transformer and a capacitor, resistors, diodes, and capacitors are formed.
- a chip component 20b such as is mounted. Among these, the lead of the lead component 20a is soldered to the wiring pattern. On the other hand, the chip component 20b is surface-mounted on the wiring pattern on the surface of the inverter board 20 on the front side.
- the inverter board 20 is connected to a power source P of the liquid crystal display device 10, boosts an input voltage input from the power source P, and outputs an output voltage higher than the input voltage to the cold cathode tube 18.
- the cold cathode tube 18 has a function of controlling turning on / off.
- the lead component 20a and the chip component 20b are not shown.
- the inverter board 20 is attached to the rear surface (the surface opposite to the cold cathode tube 18) of the bottom plate 14 a of the chassis 14 so as not to face other members.
- a pair of bottom plates 14a are symmetrically arranged at both end positions in the long side direction.
- the inverter board 20 has a substantially rectangular shape in plan view, and its plate surface is a plate surface of the bottom plate 14a of the chassis 14 (the X-axis direction and the Y-axis direction, and the Z-axis direction which is the thickness direction of the liquid crystal display device 10).
- the long side direction coincides with the short side direction (Y-axis direction, the direction perpendicular to the axial direction of the cold cathode tube 18) of the bottom plate 14a. It is fixed with screws.
- a connector connection portion 20c that is inserted into and connected to the relay connector 21 is provided.
- a plurality of connector connection portions 20c are arranged in parallel along the long side direction of the inverter board 20 by providing notches intermittently at the end of the inverter board 20 (the number of relay connectors 21).
- substrate 20 has comprised the comb-tooth shape.
- each connector connecting portion 20c can be individually inserted into each relay connector 21, and a distal end portion is provided with a terminal portion 20d extending from the wiring pattern.
- the width dimension of the connector connecting portion 20c is wider than the opening width of the board insertion opening 23c in the relay connector 21, and the difference is substantially equal to the interval between the adjacent relay connectors 21.
- the inverter board 20 is opposed to the bottom plate 14a of the chassis 14 with a predetermined interval, and the non-insertion position (FIGS. 9 and 10) where the connector connecting portion 20c is detached from the relay connector 21 and the bottom plate 14a. While maintaining the above-described distance (positional relationship in the Z-axis direction) between the connector connecting portion 20c and the insertion position (FIGS. 11 to 13) inserted into the relay connector 21, the same as the non-insertion position.
- the bottom plate 14a of the chassis 14 is movable in the X-axis direction (the short side direction of the inverter substrate 20) along the plate surface of the inverter substrate 20. Specifically, in the non-insertion position, as shown in FIGS.
- the connector connecting portion 20c is arranged with a predetermined interval in the X-axis direction between the relay connector 21 and the terminal portion 20d is The terminal fitting 24 of the relay connector 21 is not contacted.
- the connector connecting portion 20c has entered the relay connector 21, and the terminal portion 20d is brought into contact with the terminal fitting 24 of the relay connector 21.
- the inverter board 20 can move substantially horizontally between the non-insertion position and the insertion position along the X-axis direction, and the direction from the non-insertion position to the insertion position is the insertion direction, and conversely the insertion position.
- the direction from the position toward the non-insertion position is the removal direction.
- the right side in the X-axis direction shown in FIGS. 6, 7, and 9 to 12 is the insertion direction, and the left side in the X-axis direction shown in FIG.
- the left side inverter board 20 and the relay connector 21 shown in FIG. 7 and FIGS. 9 to 12 the right side in the X-axis direction is the front side, and the left side is the back side.
- the inverter board 20 is attached to each relay connector 21 by being moved from the non-insertion position to the insertion position while maintaining a predetermined positional relationship with respect to the chassis 14 in the Z-axis direction. It is like that. However, since the lead component 20a and the chip component 20b are mounted on the surface of the inverter board 20 that faces the chassis 14, when the inverter board 20 is placed at a non-insertion position with respect to the chassis 14, the inverter board 20 If the position shifts in the Z-axis direction, the lead component 20a and the chip component 20b may come into contact with the chassis 14.
- the inverter substrate 20 moves while restricting the inverter substrate 20 from approaching the chassis 14 at the four corners of the surface of the inverter substrate 20 (surface on the chassis 14 side).
- a guide boss (access restriction boss) 30 is erected.
- the guide boss 30 is soldered onto the wiring (ground) of the inverter board 20.
- the guide boss 30 is made of metal and includes a cylindrical portion 31 having a substantially cylindrical shape and a ball (spherical member) 32 that is rotatably held at the tip of the cylindrical portion 31. ing. More specifically, the tip of the cylindrical portion 31 on the chassis 14 side has an opening 31a, and approximately half of the ball 32 stored in the cylindrical portion 31 is exposed from the opening 31a. . When a frictional resistance is generated in the exposed portion of the ball 32, the ball 32 rotates.
- the guide boss 30 comes into contact with the chassis 14 when the inverter board 20 is placed at the insertion position or the non-insertion position.
- the chassis 14 and the guide boss 30 are made of metal, the inverter board 20 can be discharged to the chassis 14 side through the guide boss 30.
- the liquid crystal display device 10 having the above-described configuration is manufactured by assembling a separately manufactured liquid crystal panel 11 and backlight device 12 with a bezel 13 or the like. Below, the assembly
- the reflection sheet 15 is laid on the front inner surface of the chassis 14. Then, by attaching each relay connector 21 from within the chassis 14, the relay connector 21 is held with respect to the chassis 14. Thereafter, each cold cathode tube 18 is accommodated in the chassis 14, and the outer lead 18 b at the end is inserted into the light source receiving portion 23 a of the relay connector 21 to be brought into elastic contact with the light source contact portion 24 a of the terminal fitting 24. Then, the holder 19, the optical member 16, and the frame 17 are sequentially assembled to the chassis 14 from the front side (see FIG. 2).
- the work of assembling the inverter board 20 to the chassis 14 is performed outside the back side of the chassis 14.
- the inverter board 20 is approached along the Z-axis direction from the back side to the chassis 14 from the removal position shown in FIG. 4 with the surface on which the lead component 20a and the chip component 20b are disposed on the front side.
- the non-insertion position shown in FIGS. 9 and 10 is reached.
- the balls 32 of the guide bosses 30 erected on the inverter board 20 come into contact with the back surface of the chassis 14.
- the inverter board 20 is separated from the chassis 14 by a predetermined distance (the height of the guide boss 30).
- the backlight device 12 is disposed on the opposite side of the cold cathode tube 18 from the cold cathode tube 18, the chassis 14 that houses the cold cathode tube 18, and the chassis 14.
- An inverter board 20 that supplies drive power to the cold cathode tube 18 and a relay connector 21 that is assembled to the chassis 14 and relays the power supply between the inverter board 20 and the cold cathode tube 18.
- the board 20 is movable along the surface of the chassis 14 between a non-insertion position where the board 20 is detached from the relay connector 21 and an insertion position where the board 20 is inserted into the relay connector 21.
- a guide boss 30 is provided on the inverter board 20 so as to restrict the inverter board 20 from approaching the chassis 14 while being in contact with the chassis 14 at the non-insertion position or the insertion position.
- the inverter board 20 In order to connect the inverter board 20 to the relay connector 21, the inverter board 20 is arranged at a non-insertion position opposite to the cold cathode tube 18 with respect to the chassis 14, and the non-insertion position is moved to the plate surface of the chassis 14. And move to the insertion position.
- the inverter board 20 is provided with a guide boss 30 that restricts the inverter board 20 from approaching the chassis 14. Therefore, the inverter board 20 is always kept at a predetermined distance from the chassis 14 at the non-insertion position or the insertion position.
- the various components 20a and 20b mounted on the inverter board 20 come into contact with the chassis 14. This can be avoided and damage to the inverter board 20 and the chassis 14 can be prevented.
- a rotatable ball 32 is attached to the tip of the guide boss 30 on the chassis 14 side. According to such a configuration, when the inverter board 20 is moved from the non-insertion position to the insertion position, the balls 32 of the guide boss 30 rotate, so that the inverter board 20 can be smoothly moved. Become.
- the inverter board 20 and the chassis 14 are kept separated from each other at least at three or more points. Therefore, when the inverter board
- the inverter board 20 has a substantially rectangular shape, and the guide bosses 30 are erected at the four corners of the inverter board 20. As described above, since the guide bosses 30 are erected at the four corners that are most likely to contact the chassis 14, the contact between the inverter board 20 and the chassis 14 can be more reliably prevented.
- the inverter board 20 can be discharged through the guide boss 30.
- Lead components 20a and chip components 20b are mounted on the inverter board 20, and unintentional natural discharge may occur in surrounding members. Therefore, by allowing discharge through the guide boss 30, unintended natural discharge can be suppressed.
- chassis 14 and the inverter board 20 are opposed to each other without any other member. In such a case, contact between the inverter board 20 and the chassis 14 occurs and damage is likely to occur, so that the guide boss 30 of the present invention is effective in preventing damage.
- FIG. 14 is a cross-sectional view showing a cross-sectional configuration along the long side direction of the liquid crystal display device according to the present embodiment.
- the inverter board 40 has a lead part 40a such as a transformer or a capacitor mounted on the back surface (surface opposite to the chassis 14), and the front surface (surface on the chassis 14 side).
- a wiring pattern (not shown) is formed and a chip component 40b such as a resistor, a diode or a capacitor is mounted thereon.
- the lead of the lead component 40 a is soldered to the wiring pattern in a state of protruding to the front side surface through the through hole of the inverter substrate 40.
- the chip component 40 b is surface-mounted on the wiring pattern on the front side surface of the inverter substrate 40.
- a connector connection portion 40c that is inserted into and connected to the relay connector 21 is provided.
- Each connector connecting portion 40c can be individually inserted into each relay connector 21, and a terminal portion 40d extending from the wiring pattern is provided at the tip of the back surface side (the side opposite to the chassis 14). ing.
- the inverter board 40 faces the bottom plate 14a of the chassis 14 and can move from the non-insertion position to the insertion position along the bottom plate 14a.
- guide bosses 30 are erected to restrict the inverter board 40 from approaching the chassis 14. More specifically, the ball 32 attached to the tip of the guide boss 30 abuts on the rear surface of the chassis 14, so that a state of being separated by a predetermined distance is maintained between the inverter board 40 and the chassis 14.
- the chip component 40b is mounted on the front side surface (surface on the chassis 14 side), and the lead component is provided on the back side surface (surface opposite to the chassis 14).
- 40a and terminal part 40d are mounted.
- the chip component 40b mounted on the surface side of the inverter board 40 can be prevented from coming into contact with the chassis 14, and the inverter board 40 can be prevented from being damaged. It becomes possible.
- FIG. 15 is a plan view showing a schematic configuration of the inverter board according to the present embodiment.
- one guide boss 51 is erected on the insertion side (front side) of the inverter board 50 to the relay connector 21 at the center in the long side direction (Y-axis direction).
- guide bosses 51 are provided upright at both corners. That is, the inverter board 50 is provided with guide bosses 51 at three positions forming a triangle. Each guide boss 51 comes into contact with the rear surface of the chassis 14 when the inverter board 50 is arranged at a non-insertion position or an insertion position.
- the inverter board 50 and the chassis 14 are kept separated from each other at at least three points. Therefore, when the inverter board 50 is moved, it is possible to move stably without being displaced with respect to the chassis 14 side (Z-axis side). As a result, contact between the inverter board 50 and the chassis 14 can be avoided, and damage to both can be prevented.
- FIG. 16 is a cross-sectional view showing a cross-sectional configuration in the long side direction of the liquid crystal display device according to the present embodiment
- FIG. 17 is an enlarged bottom view of the chassis to which a cover is attached.
- the cover 60 is made of an insulating synthetic resin, and is interposed between the bottom plate 14a of the chassis 14 and the inverter board 20, as shown in FIG.
- the covers 60 are attached to the back surface of the bottom plate 14a of the chassis 14 (the surface opposite to the cold cathode tube 18), and a pair of covers 60 are disposed at both ends of the bottom plate 14a in the long side direction.
- the installation area of the relay connector 21 in the bottom plate 14a is covered over a predetermined range.
- the cover 60 has a substantially rectangular shape in plan view, and the cover 60 is arranged side by side in the Y-axis direction in a direction in which the long side direction coincides with the short side direction of the bottom plate 14a. And fixed to both ends of the long side direction of the bottom plate 14a with screws or the like. Therefore, the long side dimension of the cover 60 is about half of the short side dimension of the chassis 14 and the long side dimension of the inverter board 20.
- the cover 60 has a substantially plate shape, and the plate surface thereof is parallel to the bottom plate 14 a of the chassis 14 and the plate surface of the inverter board 20.
- the cover 60 is roughly the side relatively close to the relay connector 21 (the end side in the chassis 14) as the front portion 60a, whereas the cover 60 is relatively far from the relay connector 21 (the center side in the chassis 14). ) Is the rear portion 60b.
- heat radiation holes 60c for heat radiation are formed to penetrate and are arranged in a plurality of rows and columns.
- a guide hole 61 through which the guide boss 30 of the inverter board 20 can slide is formed in the cover 60 along the insertion direction (X-axis direction) of the inverter board 20.
- the guide hole 61 is an elongated, substantially rectangular hole and extends from the front part 60 a to the rear part 60 b of the cover 60.
- the inverter board 20 When the inverter board 20 is arranged at the non-insertion position, the inverter board 20 faces the cover 60. Guide bosses 30 are erected on the four corners of the inverter board 20. The guide boss 30 passes through the guide hole 61 of the cover 60 and abuts on the back surface of the bottom plate 14 a of the chassis 14. When the inverter board 20 is moved from the non-insertion position to the insertion position along the back surface of the chassis 14, the guide boss 30 moves along the guide hole 61 on the bottom plate 14 a of the chassis 14. By this guide boss 30, the inverter board 20 and the chassis 14 are maintained in a state of being separated by a predetermined distance.
- the insulating cover 60 is attached between the inverter board 20 and the chassis 14, unintentional natural discharge from the inverter board 20 to the chassis 14. Can be suppressed. Further, since the guide boss 30 provided on the inverter board 20 penetrates the guide hole 61 of the cover 60 and contacts the chassis 14, contact between the inverter board 20 and the chassis 14 can be avoided. It is possible to prevent damage to both.
- the guide boss is configured such that the ball is rotatably held at the tip of the cylindrical portion, but the ball may be omitted.
- the inverter board is moved from the non-insertion position to the insertion position, the approach of the inverter board and the chassis is restricted by the tip of the cylindrical portion sliding on the chassis.
- a pair of inverter substrates is arranged corresponding to the electrodes at both ends of the cold cathode tube, but one inverter substrate is omitted and the cold cathode tube is driven on one side. What was done is also included in the present invention. In that case, a ground circuit may be connected to the relay connector on the side where the inverter board is omitted (low voltage side).
- the cold cathode tube is provided with the outer lead protruding at the end of the glass tube, and this outer lead is connected to the connector.
- the outer lead is connected to the outer lead at the end of the glass tube.
- the present invention includes a case in which the base is externally connected and the base is connected to the connector.
- the present invention includes those using other types of fluorescent tubes such as a hot cathode tube. . Further, the present invention includes a type using a discharge tube (such as a mercury lamp) other than the fluorescent tube.
- SYMBOLS 10 Liquid crystal display device (display device), 11 ... Liquid crystal panel (display panel), 12 ... Backlight device (illuminating device), 14 ... Chassis, 18 ... Cold-cathode tube (light source), 20 ... Inverter board (electric power supply board) , 21 ... Relay connector, 30 ... Guide boss (access restriction boss), 32 ... Ball (spherical member), 60 ... Cover, TV ... Television receiver
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Planar Illumination Modules (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
Description
上記特許文献1に開示された液晶表示装置では、インバータユニットをランプソケットに接続するには、インバータユニットをシャーシの裏面に対して対向させた状態に保ちつつ、ガイド部に沿って水平にスライドさせてランプソケットに挿入する構成となっている。ここで、当該液晶表示装置の構成では、インバータユニットは、シャーシの面内方向、及びシャーシから遠ざかる方向にはガイドされるものの、シャーシの裏面に接近する方向に対してはガイドされないものとなっている。一般に、インバータユニットにおけるシャーシとの対向面には各種チップ部品が実装されており、インバータユニットがシャーシの裏面に接近しすぎて互いに接触した場合には、インバータユニットが損傷するおそれがある。
上記課題を解決するために、本発明の照明装置は、光源と、前記光源を収容するシャーシと、前記シャーシに対して前記光源とは反対側に配され、前記光源に対して駆動電力を供給する電力供給基板と、前記シャーシに組み付けられ、前記電力供給基板と前記光源との間の電力供給を中継する中継コネクタと、を備え、前記電力供給基板は、前記中継コネクタから離脱した非挿入位置と、前記中継コネクタに挿入された挿入位置との間で、前記シャーシの面に沿って移動可能であり、前記電力供給基板には、前記非挿入位置又は前記挿入位置において、前記シャーシに当接しつつ、当該電力供給基板が前記シャーシに接近することを規制する接近規制ボスが立設されていることを特徴とする。
このような構成によれば、電力供給基板を非挿入位置から挿入位置に移動させる際に、接近規制ボスの球状部材が回転することで、電力供給基板の円滑な移動を実現することが可能となる。
このような構成によれば、電力供給基板とシャーシとが少なくとも3点以上で互いに離間した状態に保たれるため、電力供給基板を移動させる際に、安定した移動が可能となる。したがって、電力供給基板とシャーシとの接触を回避することができ、両者の損傷を防止することが可能となる。
電力供給基板が略矩形状とされる場合、その四隅が最もシャーシに接触し易い。そこで、四隅に接近規制ボスを立設することにより、電力供給基板とシャーシとの接触をより一層確実に防止することが可能となる。
電力供給基板には各種電子部品が実装されており、周囲の部材(例えばシャーシなど)に意図しない自然放電が生じる場合がある。そこで、接近規制ボスを通じて放電可能とすることにより、意図しない自然放電を抑制することが可能となる。
このような場合、電力供給基板とシャーシとの接触が生じて損傷が発生し易くなるため、本発明の構成が好適に用いられる。
このような構成によれば、電力供給基板からシャーシへの意図しない自然放電を抑制することが可能となる。
このような表示装置によると、表示パネルに対して光を供給する照明装置が、組付けに伴う損傷が生じ難いものであるため、製造コストの低減を図ることができるとともに動作信頼性にも優れる。
このようなテレビ受信装置によると、製造コストの低減を図ることができるとともに、動作信頼性に優れた装置を提供することが可能となる。
本発明によれば、シャーシとインバータ基板との組付けに伴う損傷を防止することが可能となる。
本発明の実施形態1を図1から図13によって説明する。本実施形態では、液晶表示装置10について例示する。
なお、各図面の一部にはX軸、Y軸及びZ軸を示しており、各軸方向が各図面で示した方向となるように描かれている。また、図2に示す上側を表側(正面側、光出射側)とし、図2に示す下側を裏側(背面側、光出射側とは反対側)とする。
図6はインバータ基板を取り付けたシャーシの底面図、図7はインバータ基板の概略構成を示す平面図、図8はインバータ基板に備わるガイドボスの構成を示す断面図である。
インバータ基板20は、合成樹脂製(例えばガラス布基材エポキシ樹脂製や紙フェノール製など)の基材上に所定の配線パターンが形成されるとともに各種電子部品が実装されてなる。詳しくは、図2に示すように、インバータ基板20の表側の面(シャーシ14側の面)には、配線パターンが形成されるとともに、トランスやコンデンサなどのリード部品20aや、抵抗やダイオードやコンデンサなどのチップ部品20bが実装されている。このうち、リード部品20aのリードは、配線パターンに対して半田付けされている。一方、チップ部品20bは、インバータ基板20の表側の面において配線パターン上に表面実装されている。このインバータ基板20は、液晶表示装置10の電源Pに対して接続されており、その電源Pから入力される入力電圧を昇圧し、入力電圧よりも高い出力電圧を冷陰極管18へ出力するなどして冷陰極管18の点灯・消灯を制御する機能を有する。なお、図6及び図7では、リード部品20a及びチップ部品20bの図示を省略している。
このような構成によれば、インバータ基板20を非挿入位置から挿入位置に移動させる際に、ガイドボス30のボール32が回転することで、インバータ基板20の円滑な移動を実現することが可能となる。
インバータ基板20には、リード部品20aやチップ部品20bが実装されており、周囲の部材に意図しない自然放電が生じる場合がある。そこで、ガイドボス30を通じて放電可能とすることにより、意図しない自然放電を抑制することが可能となる。
本発明の実施形態2を図14によって説明する。この実施形態2では、実施形態1からインバータ基板40の構成を変更したものを示す。なお、この実施形態2において、上記実施形態1と同様の部材には、上記実施形態と同符号を付して図示及び説明を省略するものもある。
図14は本実施形態に係る液晶表示装置の長辺方向に沿った断面構成を示す断面図である。
本発明の実施形態3を図15によって説明する。この実施形態3では、実施形態1からガイドボス51の配置構成を変更したものを示す。なお、この実施形態3において、上記実施形態1と同様の部材には、上記実施形態と同符号を付して図示及び説明を省略するものもある。
図15は本実施形態に係るインバータ基板の概略構成を示す平面図である。
本発明の実施形態4を図16によって説明する。この実施形態4では、実施形態1にカバー60を取り付けたものを示す。なお、この実施形態4において、上記実施形態1と同様の部材には、上記実施形態と同符号を付して図示及び説明を省略するものもある。
図16は本実施形態に係る液晶表示装置の長辺方向の断面構成を示す断面図、図17はカバーを取り付けたシャーシの拡大底面図である。
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれる。
Claims (10)
- 光源と、
前記光源を収容するシャーシと、
前記シャーシに対して前記光源とは反対側に配され、前記光源に対して駆動電力を供給する電力供給基板と、
前記シャーシに組み付けられ、前記電力供給基板と前記光源との間の電力供給を中継する中継コネクタと、を備え、
前記電力供給基板は、前記中継コネクタから離脱した非挿入位置と、前記中継コネクタに挿入された挿入位置との間で、前記シャーシの面に沿って移動可能であり、
前記電力供給基板には、前記非挿入位置又は前記挿入位置において、前記シャーシに当接しつつ、当該電力供給基板が前記シャーシに接近することを規制する接近規制ボスが立設されていることを特徴とする照明装置。 - 前記接近規制ボスのうち前記シャーシ側の先端には、回転可能な球状部材が取り付けられていることを特徴とする請求項1に記載の照明装置。
- 前記接近規制ボスは、前記電力供給基板に少なくとも3つ立設されていることを特徴とする請求項1又は請求項2に記載の照明装置。
- 前記電力供給基板は平面視略矩形状であり、
前記接近規制ボスは、前記電力供給基板の四隅に立設されていることを特徴とする請求項1から請求項3のいずれか1項に記載の照明装置。 - 前記電極供給基板は、前記接近規制ボスを通じて放電可能であることを特徴とする請求項1から請求項4のいずれか1項に記載の照明装置。
- 前記シャーシと前記電力供給基板とは、他の部材を介さず互いに対向していることを特徴とする請求項1から請求項5のいずれか1項に記載の照明装置。
- 前記シャーシと前記電力供給基板との間には、絶縁性のカバーが取り付けられていることを特徴とする請求項1から請求項5のいずれか1項に記載の照明装置。
- 請求項1から請求項7のいずれか1項に記載の照明装置と、前記照明装置からの光を利用して表示を行う表示パネルと、を備えることを特徴とする表示装置。
- 前記表示パネルは、一対の基板間に液晶を封入してなる液晶パネルであることを特徴とする請求項8に記載の表示装置。
- 請求項8又は請求項9に記載された表示装置を備えることを特徴とするテレビ受信装置。
Priority Applications (5)
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US13/202,113 US20110298992A1 (en) | 2009-03-13 | 2009-12-15 | Lighting device, display device and television receiver |
CN2009801579894A CN102348926A (zh) | 2009-03-13 | 2009-12-15 | 照明装置、显示装置以及电视接收装置 |
JP2011503655A JPWO2010103705A1 (ja) | 2009-03-13 | 2009-12-15 | 照明装置、表示装置、及びテレビ受信装置 |
EP09841530A EP2407707A4 (en) | 2009-03-13 | 2009-12-15 | LIGHTING DEVICE, DISPLAY DEVICE AND TELEVISION APPARATUS |
RU2011137514/07A RU2011137514A (ru) | 2009-03-13 | 2009-12-15 | Устройство подсветки, дисплейное устройство и телевизионный приемник |
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JP2006243628A (ja) * | 2004-06-29 | 2006-09-14 | Matsushita Electric Ind Co Ltd | 液晶表示装置 |
JP2007280955A (ja) * | 2006-04-03 | 2007-10-25 | Samsung Electronics Co Ltd | ランプホルダ、電源供給モジュール、これを有するバックライトアセンブリ、及び表示装置 |
JP2008027880A (ja) | 2006-07-20 | 2008-02-07 | Samsung Electronics Co Ltd | バックライトユニット及びこれを備えた液晶表示装置 |
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JP4552089B2 (ja) * | 2005-09-09 | 2010-09-29 | ミネベア株式会社 | バックライト装置及び液晶表示装置 |
KR101222974B1 (ko) * | 2006-06-01 | 2013-01-17 | 엘지디스플레이 주식회사 | 액정표시장치용 인버터 및 이를 이용한 액정표시장치 모듈 |
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2009
- 2009-12-15 US US13/202,113 patent/US20110298992A1/en not_active Abandoned
- 2009-12-15 WO PCT/JP2009/070870 patent/WO2010103705A1/ja active Application Filing
- 2009-12-15 CN CN2009801579894A patent/CN102348926A/zh active Pending
- 2009-12-15 EP EP09841530A patent/EP2407707A4/en not_active Withdrawn
- 2009-12-15 JP JP2011503655A patent/JPWO2010103705A1/ja active Pending
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JP2006243628A (ja) * | 2004-06-29 | 2006-09-14 | Matsushita Electric Ind Co Ltd | 液晶表示装置 |
JP2007280955A (ja) * | 2006-04-03 | 2007-10-25 | Samsung Electronics Co Ltd | ランプホルダ、電源供給モジュール、これを有するバックライトアセンブリ、及び表示装置 |
JP2008027880A (ja) | 2006-07-20 | 2008-02-07 | Samsung Electronics Co Ltd | バックライトユニット及びこれを備えた液晶表示装置 |
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JPWO2010103705A1 (ja) | 2012-09-13 |
EP2407707A1 (en) | 2012-01-18 |
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