CN1256616C - LCD device - Google Patents
LCD device Download PDFInfo
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- CN1256616C CN1256616C CN 02141284 CN02141284A CN1256616C CN 1256616 C CN1256616 C CN 1256616C CN 02141284 CN02141284 CN 02141284 CN 02141284 A CN02141284 A CN 02141284A CN 1256616 C CN1256616 C CN 1256616C
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- liquid crystal
- display device
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Abstract
The present invention relates to a liquid crystal display device which comprises a liquid crystal plate, a base, a side reflective mirror, a diffuser and a bottom reflective mirror. A plurality of lamp holders which are arrayed into a row on a direction which is parallel to the surface of the liquid crystal plate are arranged in the side reflective mirror. The lamp holders are arrayed for respectively fixing the ends of the low-pressure sides of lamps. A returning base plate extends along the arraying direction of the lamps which are correspondingly arranged on the lamp holders on the liquid crystal plate. Moreover, a leading wire is pulled to the returning base plate from the ends of the low-pressure sides of the lamps and is led out, and then, the leading wire penetrates through the lamp holders and is connected to the returning base plate. By using the structure, an image frame area is possibly changed narrow.
Description
Invention field
The present invention relates to have a kind of liquid crystal display device of straight backlight assembly, picture frame is narrowed down, and make a kind of liquid crystal display device of even brightness of liquid crystal board.
Background technology
A monitor in the personal computer of monitor, stand-alone display and the notebook-sized of used for liquid crystal display device in constituting thin type TV receiver.Traditional LCD is to be made of backlight assembly, liquid crystal board and a shell, the light that wherein said panel allows to project from backlight assembly therefrom passes through selectively, and forming an image thereon, described shell is used to hold backlight assembly and liquid crystal board.As backlight edge backlit and directly backlight arranged, the feature of edge backlit is: will light source be placed on the side of shell resemble the fluorescent light, and straight backlight being characterised in that: light source is placed on the opposite of liquid crystal board, and light is directed on the liquid crystal board by optical plate.Compare with the edge backlit light source, straight backlight assembly can improve the brightness of liquid crystal board, thereby can be used for the configuration example interior monitor of thin TV receiver of high definition type in this way.
Liquid crystal board show to refer to a kind of like this panel: it comprise have a transparency carrier resembling the such on-off element of TFT (thin film transistor (TFT)), the transparent counter substrate relative and be sealed in two liquid crystal between the substrate with this transparency carrier, liquid-crystal display section is arranged with matrix form, wherein a plurality of drivers link to each other with a signal line with a sweep trace that is positioned at each liquid crystal display device parts respectively, and a connection substrate is connected to each driver.Back light comprises the diffusing globe that a light source resemble the fluorescent light, the light that is used for the support of clamping light source and is used for sending from light source exhale.
Fig. 1 is a partial sectional view, has shown the structure of traditional liquid crystal display device.Just as shown in the drawing, traditional liquid crystal display device is provided with the display panels 22 that is used for displayed image and the frame 21 of L shaped parts, frame 21 is in the lateral parts that covers liquid crystal board 22 surfaces, also liquid crystal board 22 is supported, and constituted the lateral parts of whole liquid crystal display device.The pad 38 of a shaped as frame links to each other with liquid crystal board 22, and base 23 links to each other with pad 38.Pad 38 is used to prevent that the glass substrate of display panels 22 from damaging because of contacting with base 23.Side reflective mirror (side reflector) 24 links to each other with base 23.In its end near liquid crystal board 22, side reflective mirror 24 supports a lateral section of diffusing globe 25.Diffusing globe 25 is translucent sheets of the white that for example can be made of acryl resin, it and liquid crystal board 22 parallel placements.
Single side reflective mirror 24 has some lamp sockets 26, and lamp socket 26 is along being arranged in a row with the surperficial parallel direction of liquid crystal board 22.Each fixes the low-pressure side parts 27 as the lamp 27 of cold cathode discharge tube each lamp socket 26.Be provided with several lamps 27, and with they parallel placements.Return substrate 28 along what the orientation of lamp 27 was extended, in linking to each other with the end part of lamp socket 26 with the offside of the arrangement side of lamp 27.Lead-in wire 29 is axially drawn from the low-pressure side end part 27a of lamp 27 along lamp 27, passes through through lamp socket 26 then, arrives and returns substrate 28, and be connected to and return on the substrate 28 by being formed on the solder joint 28b that returns on the substrate surface 28a.28a is vertical with the display surface of liquid crystal board 22 on the surface.Returning the lead-in wire 29 that substrate 28 links to each other with low-pressure side end part 27a with lamp 27 is connected to each other.
One end of unit cable (not shown) is connected to and returns substrate 28, and the other end is connected to phase inverter substrate (not shown) simultaneously, and this phase inverter substrate is connected on end, the high-pressure side part (not shown) of lamp 27.For preventing that returning substrate 28 contacts the short circuit that causes with frame 21, formed a gap 31 between substrate 28 and the frame 21 returning, and on the inside surface of frame 21, posted an insulating trip 32.In addition, a bottom viewfinder 30 is located at diffusing globe 25 offsides, and lamp 27 is between them simultaneously.Bottom viewfinder 20 is used for the light from lamp 27 is reflected towards liquid crystal board 22.
At each two ends, provide an invalid light radiating portion 27b respectively as the lamp 27 of cold cathode discharge tube.Parts between the invalid smooth radiating portion 27b at two ends are effective light radiating portion 27c.The part that the invalid smooth radiating portion 27b of each lamp 27 is cold cathode discharge tubes is placed with the electrode (not shown) in this section.Invalid smooth radiating portion 27b also launches light, but the light of being launched is very weak and inhomogeneous.Although the length of each invalid smooth radiating portion 27b is difference owing to the difference of lamp manufacturer, usually about 7mm.As shown in Figure 1, in this traditional liquid crystal display device, invalid smooth radiating portion 27b is almost covered by side reflective mirror 24 and lamp socket 26.
In traditional liquid crystal display device, the picture frame zone 34 of displayed image is not formed at around the viewing area 33 of the displayed image by liquid crystal board 22.Picture frame zone 34 be by invalid smooth radiating portion 27b, lamp socket 26, return substrate 28, gap 31 with and inside surface on be pasted with insulating trip 32 frame 21 define.
In recent years, for liquid crystal display device, need it to reduce size and increase its display area.For satisfying this demand, need to form narrow as far as possible picture frame zone.But, as shown in Figure 1, in traditional liquid crystal display device, invalid smooth radiating portion 27b appears at the two ends of each lamp 27, a lamp socket 26 is provided between lamp 27 and frame 21, has returned substrate 28 and gap 31, in addition, also had an insulating trip 32 to be attached on the inside surface of frame 21.Like this, when being narrowed down, picture frame run into restriction.
Fig. 2 is a part sectioned view, and it has shown the structure of another kind of traditional liquid crystal display device.In liquid crystal display device shown in Figure 2, be provided with the length of each lamp 27 shorter, so that make picture frame zone 34 narrow as much as possible than display panels 22.In addition, given up base 23, side reflective mirror 24 and lamp socket 26 used among Fig. 1, and replaced base with reflective mirror 36.Other structure of traditional liquid crystal display device shown in Figure 2 is identical with liquid crystal display device shown in Figure 1.
But there is following problem in this traditional liquid crystal display device shown in Figure 2.In liquid crystal display device, the length of each lamp 27 is provided with to such an extent that be shorter than described display panels 22, so that make picture frame zone 34 narrow as much as possible.The result, although the picture frame zone 34 of liquid crystal display device shown in Figure 2 is narrower than liquid crystal display device shown in Figure 1, but the invalid smooth radiating portion 27b of each lamp 27 is not had the base of reflective mirror 36 to be covered fully, thereby outstanding between the base with reflective mirror 36.Set: in Fig. 2, the length of each outstanding invalid smooth radiating portion 27b is A from the base with reflective mirror 36.As a result, when displayed image in viewing area 33, effective light radiating portion 27c of each lamp 27 becomes farther from the base with reflective mirror 36, and its distance is A, has so just produced a problem: the lateral parts deepening of viewing area 33.
In addition, in the traditional liquid crystal display device shown in Fig. 1 and 2, the surperficial 28a that returns substrate 28 is vertical with the display surface of display panels 22, therefore, when the assembling liquid crystal display device, when vertical installation comprises lamp 27, lamp socket 26 and side reflective mirror 24, scolding tin need be added in and return on the substrate surface 28a, so that the axle of lamp 27 becomes vertically.Like this, not only assembly working is spent all very much, work efficiency is low, and assembly working becomes more dangerous.
Summary of the invention
An object of the present invention is to provide the narrow liquid crystal display device in picture frame zone, it is advantageous that the brightness in the viewing area is even, and implement installment work easily.
And liquid crystal display device of the present invention is provided with: liquid crystal board, backlight assembly and the frame that is used to hold liquid crystal board and backlight assembly.Backlight assembly comprises some cold cathode discharge tubes, lead-in wire and returns substrate with described lead-in wire connects mutually, described lead-in wire is directly drawn from an end of cold cathode discharge tube along the direction that vertically intersects with pipe respectively, or afterwards, along vertically drawing of pipe.Returning substrate is positioned at and departs from out along on the position of the extended line of the longitudinal direction of cold cathode discharge tube.
Like this, in the present invention, along the direction that intersects with the longitudinal direction of cold cathode discharge tube, lead-in wire is drawn from an end face of pipe, and return on the position that substrate is positioned at the extend longitudinally line that departs from out cold cathode discharge tube.Therefore, the picture frame zone is narrowed down, the amount that narrows down is with to return substrate corresponding.In addition,, just no longer need to be used to prevent to return substrate and the contacted gap of frame owing to return on the extend longitudinally line that substrate is not positioned at cold cathode discharge tube, and insulating trip in addition, thus, the picture frame zone is further narrowed down.
In addition,, can use the cold cathode discharge tube longer, therefore can increase the length of effective light radiating portion of each cold cathode discharge tube than prior art owing to size with respect to liquid crystal display device.So the invalid smooth radiating portion in each cold cathode discharge tube can be between side reflective mirror and frame, thus, can improve the homogeneity of brightness in the viewing area of liquid crystal board.
In addition, it is parallel with the longitudinal direction of cold cathode discharge tube to make the scolder that returns substrate form the surface, thus, in the assembly operation of liquid crystal display device, allow to lie down the while at cold cathode discharge tube, wire bonds to returning on the substrate.As a result, might improve the assembly operation of liquid crystal display device.
Can lead-in wire be drawn from an end face of pipe along the longitudinal direction of cold cathode discharge tube, then, make it bend towards liquid crystal board.In this respect, backlight assembly has a bottom viewfinder and a side reflective mirror at the liquid crystal board offside, and cold cathode discharge tube is between liquid crystal board and bottom viewfinder, and described side reflective mirror is arranged along a side of bottom viewfinder.Returning substrate can be between side reflective mirror and frame.
Can lead-in wire be drawn from an end face of pipe along the longitudinal direction of cold cathode discharge tube, afterwards, bend towards a side opposite with liquid crystal display device.In this respect, backlight assembly can have the seat of support, is used to hold an end of cold cathode discharge tube, returns substrate and can be installed on the support seat.According to this structure, return the supporting that substrate can be subjected to supporting seat, and needn't be provided for supporting the described any special-purpose member that returns substrate.
Cold cathode discharge tube can be provided with electrode respectively in the outside of one end, and lead-in wire can be connected respectively on these electrodes, and lead-in wire is extended along the direction that the longitudinal direction with cold cathode discharge tube intersects.Like this, might prevent by making the crooked and burden that lead-in wire is applied of lead-in wire.Returning substrate can be the insulcrete that is formed with wiring pattern on it.Return the shape that substrate can be made of plate, bar or cable etc. metal or alloy.Like this, can return substrate with required arbitrary shape formation.As a result, can be reposefully with in the gap of returning between each element that substrate embeds liquid crystal display device, or its assembling and be fixed in this composed component.
Bottom viewfinder can be the resin plate of sheet metal or white, or its surface has the sheet metal or the resin plate of a reflective coating.In the present invention, speech " metal " expression comprises metal and alloy." reflective mirror " mentioned in the text is meant reflection horizon that is made of resin film, the scraps of paper or vinyl film etc.Coating is meant coating or associated layer.
Like this,, might obtain the very narrow liquid crystal display device in picture frame zone, it is advantageous that the homogeneity of brightness in the viewing area, and realize fitting operation easily according to the present invention.
Brief description of drawings
Fig. 1 is a part sectioned view, and it has shown the structure of traditional liquid crystal display device;
Fig. 2 is a part sectioned view, and it has shown the structure of the liquid crystal display device that another is traditional;
Fig. 3 is a part sectioned view, and it has shown the structure according to the liquid crystal display device of first embodiment of the invention;
Fig. 4 is an exploded view, and it has shown the structure of the liquid crystal display device of first embodiment;
Fig. 5 is a part sectioned view, and it has shown the structure according to the liquid crystal display device of second embodiment of the invention; And
Fig. 6 is a part sectioned view, and it has shown the structure according to the liquid crystal display device of the modification of second embodiment.
The detailed description of most preferred embodiment
Below, with reference to the accompanying drawings, embodiments of the invention are specifically described.Now, the first embodiment of the present invention is described.Fig. 3 is a part sectioned view, and it has shown the structure according to the liquid crystal display device of first embodiment of the invention, and Fig. 4 is an exploded view, and it has shown the structure of this liquid crystal display device.Shown in Fig. 3 and 4, in this embodiment of liquid crystal display device, be provided with the liquid crystal board 2 that is used for displayed image, also be provided with the frame 1 of L shaped parts, frame 1 also supports liquid crystal board 2 at the lateral parts that covers the liquid crystal board surface and when constituting the lateral parts of whole liquid crystal display device.The connection substrate 11 (referring to Fig. 4) that is used to drive liquid crystal board 2 is added to same plate.Connecting that substrate 11 is almost crooked must be rectangular with display panels 2, and is contained in the inside of frame 1.
Frame shape pad 18 (referring to Fig. 4) is connected to liquid crystal board 2, and base 3 is connected on the inside surface of frame 1, is also connected on the pad 18.Pad 18 is used to prevent that liquid crystal board 2 is damaged owing to contacting with base 3.Side reflective mirror 4 is connected to a side of base 3, on 4 angles of base 3, in that a side of side reflective mirror 4 is provided, is respectively equipped with fixture 19.The diffusing globe 5 that is used to make the mating plate 12 that the light of institute's transmission converges and is used to make the light of institute's transmission to disperse places between base 3 and the side reflective mirror 4.Mating plate 12 and diffusing globe 5 are by base 3, side reflective mirror 4 and fixture 19 supportings.Mating plate 12 and diffusing globe 5 for example can be the translucent white flakes that is made of acryl resin, and can in turn be superimposed abreast with liquid crystal board 2.With respect to diffusing globe 5, mating plate 12 place more close liquid crystal board 2.
The side reflective mirror 4 that is provided has some lamp sockets 6, these lamp sockets with the surperficial parallel direction of liquid crystal board 2 on be arranged in a row.The end 7a of low pressure one side of each fixing lamp 7 as cold cathode discharge tube of each lamp socket 6.Be provided with some lamps 7, and these lamp parallel arranged.On its side opposite with liquid crystal board 2, the substrate 8 that returns that extends along the orientation of lamp 7 is connected on the lamp socket 6.Return substrate 8 and comprise insulated substrate formed thereon and wiring pattern.But it is not so-called returning substrate 8, is printed with the circuit substrate of the class component of transistor on it.At first along the axle of lamp 7, one side end 7a stretches lead-in wire 9 from low pressure, afterwards, towards returning substrate 8 bendings, pass arrival then through lamp socket 6 and return substrate 8, and be connected on the solder joint 8b that is formed on the surperficial 8a who returns substrate 8, wherein said surperficial 8a is on liquid crystal board 2 opposites.Like this, the low pressure one side end 7a of lamp 7 is connected to each other through returning substrate 8.
All be respectively equipped with invalid smooth radiating portion 7b in two ends as each lamp 7 of cold cathode discharge tube.Part between the invalid light emitting members 7b at two ends is an effective light radiating portion 7c.The invalid smooth radiating portion 7b of each lamp 7 is the parts that are placed with electrode in the cold cathode discharge tube.Be positioned at the invalid smooth radiating portion 7b of side reflective mirror 4 one sides, be hidden in the outside of side reflective mirror 4.In this embodiment of liquid crystal display device, not the picture frame zone 14 of displayed image be formed at viewing area 13 around, described viewing area is by liquid crystal board 2, image is shown on the visual display surface of liquid crystal display device, the invalid smooth radiating portion 7b and the lamp socket 6 of lamp 7 all are positioned within the picture frame zone 14.When seeing past tense from lamp 7 one sides, bottom viewfinder 10 is positioned at a side opposite with liquid crystal board 2.The bottom viewfinder 10 that will reflect towards display panels 2 from the light of lamp 7, be to constitute by metal parts with high luminous reflectivity, or by with the coating of the reflecting material of white resin and so on or paste and form on the metal of aluminum or aluminum alloy and so on.The core of bottom viewfinder 10 and the surface of adjacent part thereof, with the axially parallel of lamp 7, surperficial parallel with diffusing globe 5, mating plate 12 and liquid crystal board 2 also simultaneously.Bottom viewfinder 10, not with side reflective mirror 4 contacted three side part oblique bendings, with around lamp 7 simultaneously also around side reflective mirror 4.
As shown in Figure 4, an end of cable 15 is connected to and returns substrate 8, and simultaneously, the other end of its offside is connected to phase inverter substrate 17, and phase inverter substrate 17 is connected to the electrode part (not shown) of high pressure one side on the high pressure end 7d that is positioned at lamp 7.Utilize screw 29, bottom viewfinder 10 is fixed on the frame 1, thus, frame 1, liquid crystal board 2, base 3, side reflective mirror 4, mating plate 12, diffusing globe 5, lamp 7, lamp socket 6, bottom viewfinder 10, cable 15 and phase inverter substrate 17 all intactly are installed together, to constitute liquid crystal display device.
Now, will the operation of the liquid crystal display device of this embodiment be described.When described 10 to 24V voltage being offered phase inverter substrate 17 by the external power source (not shown), phase inverter substrate 17 arrives 1000V with this boost in voltage to described 500, and provide it to the high voltage side electrode part of the end 7d of high pressure one side that is positioned at lamp 7, thereby make lamp 7 luminous.The light of being launched by lamp 7 is directly to diffusing globe 5 transmissions, or after the reflection that is subjected to bottom viewfinder 10 or side reflective mirror 4, again by diffusing globe 5, thereby by diffusion, then, converges by mating plate 12 and by it, and the light that is converged is fed to liquid crystal board 2.By the liquid crystal board 2 that web joint 11 is driven, the light from mating plate 12 that allows to be presented passes through selectively, and generates color, thereby forms image in the viewing area 13 of liquid crystal board 2.
In this embodiment of liquid crystal display device, lead-in wire 9 is guided into liquid crystal board 2 by the low-pressure side end 7a from lamp 7, returns substrate 8 and is placed on the lamp socket 6 at the offside of its liquid crystal board 2.Therefore, different with traditional liquid crystal display device, in this embodiment of liquid crystal display device, between lamp socket 6 and frame 1, both do not returned substrate, there is not insulating trip (referring to Fig. 1) yet.The result, compare with the conventional liquid crystal part, in this embodiment of liquid crystal display device, picture frame zone 14 can be narrowed down, the amount of narrowing down with return substrate 28 and insulating trip 32 is corresponding, as can seeing by the comparison between zone 34 of the picture frame in the conventional liquid crystal part shown in Figure 1 and the picture frame zone 14 shown in Figure 3.Compare with the conventional liquid crystal part, in this embodiment, can make picture frame zone 14 narrow about 2mm.At present, in liquid crystal display device, the reduced volume and the screen size that increases all are the very important targets that hope reaches.Therefore, picture frame zone 14 can be done than the also narrow about 2mm of prior art, be very outstanding effect.
In addition, different with traditional liquid crystal display device shown in Figure 2, present embodiment needn't shorten lamp 7 for constriction picture frame zone 14.Therefore, as can by the comparison of the length A in the liquid crystal display device of the length A in traditional liquid crystal display device shown in Figure 2 and this embodiment shown in Figure 3 see, the invalid smooth radiating portion 7b major part of lamp 7 can be covered by side reflective mirror 4, can make the brightness of display panels 2 even thus.
Perhaps, also can make the length of lamp 7, and the width that makes picture frame zone 14 simultaneously is almost identical with the width in picture frame zone in the conventional liquid crystal part than traditional liquid crystal display device.So, the invalid smooth radiating portion 7b of lamp 7 can be covered by side reflective mirror 4 fully.That is length A, shown in Figure 3 can be set to zero.As a result, make that the brightness of liquid crystal board 2 can be more even.Like this, in this embodiment, can picture frame be narrowed down, obtain the even of brightness with higher level simultaneously.
In addition, in this embodiment, the scolder formation face 8a that returns substrate 8 is parallel with bottom viewfinder 10.Therefore, when assembling liquid crystal display spare, liquid crystal display device can be positioned on the worktable, it is parallel with the upper surface of worktable that bottom viewfinder 10 is just become, and can carry out welding in this state.Therefore, not only make assembly working become easier, work efficiency improved, and, also improved security.
Lamp socket 6 is contacted with the inside surface of frame 1, thus, not only might eliminate the gap between lamp socket 6 and the frame 1, thereby make picture frame zone 14 become narrower, but also might improve the rigidity of whole liquid crystal display device.Employed in this embodiment bottom viewfinder 10 is to be made of the metal parts with high luminous reflectivity, or forms on the such sheet metal of aluminum or aluminum alloy sheet by a white resin being coated to resemble.But this is not construed as limiting the invention.For example, bottom viewfinder can be formed by white resin, or by for example being that the sheet metal with minute surface of high reflectance constitutes.By coating or paste, can make the reflecting material of the such height reflection of paper or vinyl be formed at the inside (reflecting surface one side) of bottom viewfinder.In addition,, and form used in this embodiment returning on the substrate 8, return substrate and be not limited in this structure although be by wiring pattern is formed on the insulated substrate.For example, returning substrate can be shape by formed of metal or alloy, bar or cable.
Next, the second embodiment of the present invention will be described.Fig. 5 is a part sectioned view, and it has shown the structure according to the liquid crystal display device of second embodiment of the invention.In this embodiment of liquid crystal display device, provide supporting lamp 7 low-pressure side end 7a lamp socket 16 and go between 9, described lead-in wire is at first along the longitudinal direction of lamp 7, stretches out from the low-pressure side end 7a of lamp 7, afterwards, along drawing away from the direction of liquid crystal board 2.Returning substrate 8 is connected on the lamp socket 16 from liquid crystal board 2 sides far away with it.The lead-in wire 9 low-pressure side end 7a from lamp 7 draw, and by the inside of lamp socket 16, are connected to the face 8a that returns substrate 8 and go up on the formed solder joint 8b.In this embodiment of liquid crystal display device, base global shape, that have reflective mirror 20 with base 3 used among previous first embodiment and side reflective mirror 4 is provided, replace base 3 and side reflective mirror 4.In addition, in this embodiment of liquid crystal display device, the use of having omitted mating plate.The structure of other among this embodiment and available point are all identical with liquid crystal display device among first embodiment.
In this embodiment of liquid crystal display device, also obtained with the first previous embodiment in identical effect.Promptly, the picture frame zone 14 of the liquid crystal display device among this embodiment is narrowed down, usedly in the amount of narrowing down and the conventional liquid crystal part return substrate 28 and insulating trip 32 (referring to Fig. 1) is corresponding, the comparison between the picture frame zone 14 in the liquid crystal display device in the zone 34 of the picture frame from conventional liquid crystal part shown in Figure 1 and this embodiment shown in Figure 5 and can see.In addition, because the base that the invalid smooth radiating portion 7b major part of lamp 7 is had reflective mirror 20 covers, so, might guarantee the uniform brightness of liquid crystal board 2, as can be from the comparison between the length A in the liquid crystal display device of the length A the conventional liquid crystal part of Fig. 2 and this embodiment shown in Figure 5 and can see.
Except above-mentioned effect, present embodiment also brings following effect.Owing to return the back side that solder joint 8b on the substrate 8 is exposed to liquid crystal display device, promptly do not establish a side of liquid crystal board 2, therefore, even if after by frame 1 liquid crystal board 2, diffusing globe 5, the base with reflective mirror 20, lamp socket 16, lamp 7 and bottom viewfinder 10 being combined into one, welding still can be carried out.Work efficiency when therefore, further having improved assembling liquid crystal display spare.In addition, because the function of employed base 3 and side reflective mirror 4 (referring to Fig. 3) is replaced by the base with reflective mirror 20 in first embodiment, thereby compares with first embodiment, might reduce employed device count.
Although in this embodiment, return substrate 8 and be connected on the lamp socket 16, also can it be installed on the bottom viewfinder 10 in its side of not placing lamp 7.
The distortion of this embodiment is described now.Fig. 6 is a part sectioned view, and it has shown the structure according to the liquid crystal display device of this modification.In this modification, metal outer electrode 35 is formed on the low-pressure side end 7a of lamp 7, and lead-in wire 9 is guided into from outer electrode 35 returns substrate 8.Identical with the liquid crystal display device of previous second embodiment all according to other structure of the liquid crystal display device of this modification and available point.In above-mentioned first and second embodiment, lead-in wire 9 at first be along lamp 7 axially, stretch out from the low-pressure side end 7a of lamp 7, afterwards, bend towards and return substrate 8, so just 9 applied certain burden to going between.On the other hand, in this modification, because outer electrode is provided, thereby can eliminate this burden.Therefore, might improve the reliability of liquid crystal display device.
Claims (10)
1. liquid crystal display device comprises:
Liquid crystal board;
Part backlight, described back light part branch comprises:
Some cold cathode discharge tubes;
A plurality of leads is in case the described lead-in wire of each bar is after an end face of described cold cathode discharge tube is drawn, just directly along the length direction bending perpendicular to described cold cathode discharge tube; And
Return substrate, it and described each lead-in wire are connected to each other, and the described upper surface that returns substrate is configured to parallel with the length direction of described cold cathode discharge tube; And
Frame is used for fixing described liquid crystal board and described part backlight.
2. according to the liquid crystal display device of claim 1, it is characterized in that, described lead-in wire by along the length direction of described cold cathode discharge tube after an end face of pipe is drawn, bent towards described liquid crystal board.
3. according to the liquid crystal display device of claim 1, it is characterized in that, described lead-in wire by along the length direction of described cold cathode discharge tube after an end face of pipe is drawn, bent towards a side opposite with described liquid crystal board.
4. according to the liquid crystal display device of claim 1, it is characterized in that the described substrate that returns forms by form wiring pattern on an insulated substrate, also can be the shape for plate, bar or the cable that is formed by metal or alloy.
5. according to the liquid crystal display device of claim 1, it is characterized in that described part backlight also comprises:
Bottom viewfinder on described liquid crystal board opposite, has described cold cathode discharge tube between the two; And
The side reflective mirror is placed on the lateral edges of described bottom viewfinder.
6. according to the liquid crystal display device of claim 5, it is characterized in that described reflection substrate is placed between described side reflective mirror and the described frame.
7. according to a kind of liquid crystal display device of claim 1, it is characterized in that described part backlight also comprises supports seat, is used for fixing an end of described cold cathode discharge tube, the described substrate that returns is installed on the described support seat.
8. according to a kind of liquid crystal display device of claim 1, it is characterized in that, described cold cathode discharge tube, the outside at an one end face is respectively equipped with electrode, and described lead-in wire is connected respectively to described electrode.
9. according to a kind of liquid crystal display device of claim 5, it is characterized in that each described cold cathode discharge tube all comprises:
Invalid smooth radiating portion is formed at the two ends of length direction respectively, and between described side reflective mirror and described frame; And
Effective light radiating portion is between two invalid smooth radiating portions.
10. according to a kind of liquid crystal display device of claim 5, it is characterized in that described bottom viewfinder is made of sheet metal or white resin sheet, or be covered with by its surface that a kind of metal of reflecting material or resin sheet constitute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02141284 CN1256616C (en) | 2002-07-05 | 2002-07-05 | LCD device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02141284 CN1256616C (en) | 2002-07-05 | 2002-07-05 | LCD device |
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| CN1466004A CN1466004A (en) | 2004-01-07 |
| CN1256616C true CN1256616C (en) | 2006-05-17 |
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| CN 02141284 Expired - Fee Related CN1256616C (en) | 2002-07-05 | 2002-07-05 | LCD device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101473265B (en) * | 2006-07-03 | 2010-11-10 | 夏普株式会社 | Illumination device for display device and display device with the same |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101002319B1 (en) * | 2004-04-29 | 2010-12-17 | 엘지디스플레이 주식회사 | Backlight unit |
| KR101290285B1 (en) * | 2006-08-10 | 2013-07-26 | 삼성디스플레이 주식회사 | Back-light assembly and liquid crystal assembly comprising the same |
| WO2011055606A1 (en) * | 2009-11-06 | 2011-05-12 | シャープ株式会社 | Lighting device, display device, and television receiver |
| JP5244872B2 (en) * | 2010-08-30 | 2013-07-24 | シャープ株式会社 | Image display device |
| JP2013097087A (en) * | 2011-10-31 | 2013-05-20 | Japan Display East Co Ltd | Liquid crystal display |
| CN105378551B (en) * | 2013-07-19 | 2019-06-18 | 堺显示器制品株式会社 | Display device |
| CN103836463A (en) | 2014-02-21 | 2014-06-04 | 北京京东方显示技术有限公司 | Backlight module and display device |
| WO2016057690A1 (en) * | 2014-10-08 | 2016-04-14 | Reald Inc. | Directional backlight |
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2002
- 2002-07-05 CN CN 02141284 patent/CN1256616C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101473265B (en) * | 2006-07-03 | 2010-11-10 | 夏普株式会社 | Illumination device for display device and display device with the same |
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| CN1466004A (en) | 2004-01-07 |
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