The content of the invention
Goal of the invention：It is an object of the invention to provide it is a kind of can effectively save cost, reduce keyboard thickness backlight keyDisk.
Technical scheme：Backlight keyboard of the present invention, its from top to bottom include keycap, elastomer, conducting wire plate withAnd bottom plate, the keycap and bottom plate coupled by scissors, and elastomer is used to support keycap and the pressing force on keycap is reached into conductionWiring board makes line conduction, and the backlight keyboard also includes backlight module, and the backlight module includes the hair being connected with conducting wire plateOptical diode and the optical transport that sends the light emitting diode to keycap light guide plate.
Specifically, the combination of conducting wire plate and backlight module may include following four：
The first combination：Light-Emitting Diode is connected with any layer of conducting wire plate, and light guide plate is located at conducting wireBelow plate.
Anti-dazzling screen can be provided with above light guide plate, or black out ink is covered with light guide plate surface.Pass through anti-dazzling screen or screeningInk causes light source to be only reflected at keycap, focus utilization light source.Anti-dazzling screen is substituted using black out ink, can further be reducedBacklight module thickness.
Second of combination：Conducting wire plate includes upper layer circuit plate, lower sandwich circuit board and positioned between the twoInsulating barrier, light emitting diode is connected with upper layer circuit plate or lower sandwich circuit board, and light guide plate is located at below conducting wire plate, lower layer lineRoad plate surface is covered with black out ink.Lower sandwich circuit board has shaded effect simultaneously, can cancel the use of anti-dazzling screen, further reductionThe thickness of backlight module.
The third combination：Conducting wire plate includes upper layer circuit plate and the insulating barrier being disposed below, light guide plate positionBelow the insulating barrier, the light guide plate surface is provided with circuit.Lower sandwich circuit board is replaced with the light guide plate provided with circuit, compared with the firstAnd the second way, reduce the integral thickness of backlight keyboard.
Above-mentioned surface of insulating layer is covered with black out ink.Insulating barrier has shaded effect simultaneously, can cancel the use of anti-dazzling screen,Reduce the thickness of backlight module.
In above-mentioned three kinds of modes, it is preferred that reflector plate can be provided with below light guide plate, or is covered with light guide plate lower surfaceReflective ink.Assembled by reflector plate or reflective ink, reclaim a part of astigmatism, and reflexed to keycap, one can be enteredStep improves keypad brightness.Reflecting piece is replaced using reflective ink, the thickness of backlight module is reduced, so as to further reduce backlightThe thickness of keyboard.
4th kind of combination：Conducting wire plate includes upper layer circuit plate and lower sandwich circuit board, and light guide plate is located at upper layer lineBetween road plate and lower sandwich circuit board.Insulating barrier is replaced with light guide plate, compared with the first and the second way, backlight keyboard is reducedIntegral thickness.
Above-mentioned upper layer circuit plate surface is covered with black out ink.Upper layer circuit plate has shaded effect simultaneously, can cancel shadingThe use of piece.
Above-mentioned lower floor's PCB surface is covered with reflective ink.Lower sandwich circuit board has the effect of reflector plate simultaneously, can cancelThe use of reflector plate.
Beneficial effect：Compared with prior art, the advantage of the invention is that：(1) backlight keyboard of the invention, by that will carry on the backLight emitting diode in optical mode group is connected to provide light source with conducting wire plate, eliminates the flexible wire in traditional backlight moduleRoad plate, greatly reduces production cost, meanwhile, more former backlight module saves space, reduces the thickness of whole backlight keyboard, carriesHigh material commonality of the backlight with non-backlight keyboard, material and die cost are reduced simultaneously；(2) present invention is reflective by printingInk, black out ink replace reflector plate, anti-dazzling screen, can further reduce the thickness of backlight module；The present invention can also be byLight guide plate replaces the insulating barrier or lower sandwich circuit board of conducting wire plate, so as to further reduce the thickness of whole backlight keyboardDegree, on the premise of backlight keyboard function is kept, backlight keyboard at least can only include three-decker, and keyboard is more frivolous, practicalityIt is stronger.
Embodiment
Technical scheme is described further below in conjunction with the accompanying drawings.
As shown in figure 1, traditional general keycap 1, elastomer 5, conducting wire plate by setting from top to bottom of backlight keyboard4th, bottom plate 2 and backlight module 6 are constituted, and backlight module 6 is fitted in the lower section of bottom plate 2 of keyboard, wherein, lead between keycap 1 and bottom plate 2Scissors 3 is crossed to couple.In this figure, the direction of arrow represents to set many places holes on light transmission direction, bottom plate 2, and light is from backlight mouldGroup 6 is sent, and is transferred to by the holes on bottom plate 2 on keycap 1.
As shown in Fig. 2 traditional backlight module 6 includes light emitting diode 7, light guide plate 8, FPC 9, anti-dazzling screen 11With reflector plate 12, light emitting diode 7 is fitted on FPC 9, and its light launched is anti-by the light guiding points 10 of light guide plate 8It is mapped on keycap 1, realizes the function of keyboard bottom-emission, still, the cost of FPC 9 is very high so that backlight keyboardThe more non-backlight keyboard of production cost is greatly improved, and the presence of FPC causes the more non-backlight key of the thickness of backlight keyboardDisk increase, it is impossible to realize sharing for backlight and non-backlight keyboard material, thicker backlight keyboard is also unfavorable for it in notebook electricityApplication in brain.
As shown in figure 3, the backlight keyboard of the present invention includes keycap 1 and bottom plate 2, keycap 1 and bottom plate 2 are connected by scissors 3,And elastomer 5 and conducting wire plate 4 are provided between keycap 1 and bottom plate 2, elastomer 5 is used to support keycap 1, and by keycap 1Pressing force is passed on conducting wire plate 4, makes line conduction.The backlight keyboard also includes backlight module 6, and backlight module 6 can be setPut below bottom plate, can also be arranged between conducting wire plate 4 and bottom plate 2.When it is arranged on conducting wire plate 4 and bottom plate 2Between when, light is directly sent from the front of backlight module 6, is irradiated to through the hole on conducting wire plate 4 or conducting wire plate 4On keycap 1 so that surface of keyboard lights.More traditional backlight keyboard, the utilization of light source is simpler, more directly, and keyboardBulk strength is more preferable.Meanwhile, the keyboard of backlight and non-backlight can be consistent in shape, and the assembling to system is more favourable.
The present invention is improved to traditional backlight module and conducting wire plate, by the light emitting diode 7 in backlight module 6Directly it is connected with conducting wire plate 4, eliminates the use of FPC, on the one hand saves former backlight module space, reductionThe thickness of backlight keyboard, improves the material commonality of backlight and non-backlight keyboard, material and die cost are reduced simultaneously；SeparatelyOn the one hand the production cost of backlight keyboard is significantly reduced.
The conducting wire plate 4 of the present invention mainly includes following four with the combination of backlight module 6.
The first combination：As shown in figure 4, backlight module 6 includes light emitting diode 7 and light guide plate 8, light emitting diode7 are connected with conducting wire plate 4, and light guide plate 8 is located at the lower section of conducting wire plate 4, and the light that light emitting diode 7 is sent enters light guide plate8, reflexed to keycap 1 by the light guiding points 10 of light guide plate 8.Conducting wire plate 4 generally comprises upper layer circuit plate, lower sandwich circuit boardAnd insulating barrier between the two, light emitting diode 7 is attached to any layer of conducting wire plate.
Compared to traditional backlight module, FPC is eliminated.
Anti-dazzling screen 11 can be set in the top of light guide plate 8 so that light source is only reflected at keycap 1, focus utilization light source,Reflector plate 12 can be set below light guide plate 8, a part of astigmatism is reclaimed, and reflexed to keycap 1, the back of the body can be further improvedThe brightness of light keyboard.
Black out ink and reflective ink can also be respectively coated in the upper and lower surface of light guide plate 8 to replace anti-dazzling screen 11With reflector plate 12, compared with traditional backlight module, anti-dazzling screen and reflector plate are eliminated, backlight keyboard can be further reducedThickness, reduces cost.
Second of combination：As shown in figure 5a and 5b, conducting wire plate 4 includes upper layer circuit plate 401, lower sandwich circuit board402 and positioned at insulating barrier 403 between the two, backlight module 6 includes light emitting diode 7 and light guide plate 8, light emitting diode 7It is connected with upper layer circuit plate 401 or lower sandwich circuit board 402, light guide plate 8 is located at the lower section of conducting wire plate 4.Itself and first wayThe structure of middle backlight module is essentially identical, and difference is essentially consisted in, by coating black out ink on the lower surface of sandwich circuit board 402 come realThe effect of existing anti-dazzling screen.
Compared to traditional backlight module, FPC is eliminated, while eliminating anti-dazzling screen.
Likewise, reflector plate 12 can be set below light guide plate 8 or reflective ink is coated in the lower surface of light guide plate 8, enter oneStep improves backlight keyboard brightness.
Above-mentioned the first and the second way are mainly the improvement to the structure of backlight module 6, can also be by conducting wire plate 4Improved simultaneously with the structure of backlight module 6, further reduce the integral thickness of backlight keyboard.Under its specific improved procedure isThe third and the 4th kind of combination stated.
The third combination：As shown in fig. 6, backlight module 6 includes light emitting diode 7 and light guide plate 8, light emitting diode7 are connected with the upper layer circuit plate 401 of conducting wire plate 4, and there is circuit on the surface of light guide plate 8, is disposed at the exhausted of conducting wire plate 4The lower section of edge layer 403, replaces former lower sandwich circuit board, conducting wire plate 4 is equivalent to by upper layer circuit plate while realizing light-guiding function401st, insulating barrier 403 and the light guide plate 8 with circuit are constituted.
Compared with traditional backlight keyboard, FPC is not only eliminated, while eliminating the lower floor in conducting wire plateThe thickness of wiring board, conducting wire plate and backlight module is reduced simultaneously；Moreover, compared with the first and the second way, furtherGround reduces the thickness of whole backlight keyboard, and keyboard is more frivolous.
Meanwhile, it can smear black out ink to replace the screening in traditional backlight module in the upper surface of insulating barrier 403 or lower surfaceMating plate；And reflector plate 12 can be set below light guide plate 8, or coat reflective ink to replace traditional backlight mould in its lower surfaceReflector plate in group, to reduce the thickness of backlight module, saves material.
4th kind of combination：As illustrated in figs. 7 a and 7b, backlight module 6 includes light emitting diode 7 and light guide plate 8, lightsDiode 7 is connected with the upper layer circuit plate 401 or lower sandwich circuit board 402 of conducting wire plate 4, and light guide plate 8 is located at into upper layer lineReplace former insulating barrier between road plate 401 and lower sandwich circuit version 402, while realizing light-guiding function, conducting wire plate 4 equivalent to byUpper layer circuit plate 401, light guide plate 8 and lower sandwich circuit board 401 are constituted.
Compared with traditional backlight keyboard, FPC is not only eliminated, while eliminating the insulation in conducting wire plateThe thickness of layer, conducting wire plate and backlight module is reduced simultaneously；Moreover, compared with the first and the second way, further droppingThe low thickness of whole backlight keyboard, keyboard is more frivolous.
Meanwhile, have the effect of anti-dazzling screen behind the upper surface of upper layer circuit plate 401 or lower surface coating black out ink concurrently, compared toTraditional backlight module, eliminates anti-dazzling screen；The lower lower surface of sandwich circuit board 402 coats the work for having reflector plate after reflective ink concurrentlyWith compared to backlight module, eliminating reflector plate, reduce the thickness of backlight module, save material.
Above-mentioned the third and the 4th kind of mode are optimal, and whole backlight keyboard is more frivolous, and its thickness is no better than non-backlightKeyboard, can realize the material commonality of backlight and non-backlight keyboard, while reducing the material and die cost of keyboard；And groupDress is simpler, and bulk property is more preferable.