CN109036928A - For the back lighting device in illuminated keyboard - Google Patents
For the back lighting device in illuminated keyboard Download PDFInfo
- Publication number
- CN109036928A CN109036928A CN201810918624.XA CN201810918624A CN109036928A CN 109036928 A CN109036928 A CN 109036928A CN 201810918624 A CN201810918624 A CN 201810918624A CN 109036928 A CN109036928 A CN 109036928A
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- China
- Prior art keywords
- covering portion
- hole
- guide plate
- protruding
- light guide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
- H01H13/83—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by legends, e.g. Braille, liquid crystal displays, light emitting or optical elements
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- Planar Illumination Modules (AREA)
Abstract
The present invention discloses a kind of back lighting device in luminous button.Illuminated keyboard includes multiple keys.Back lighting device according to the present invention includes light guide plate, light source, anti-dazzling screen and reflecting piece.Anti-dazzling screen includes shielding part and multiple first protruding portions.Reflecting piece includes central portion and multiple second protruding portions.The shielding part of anti-dazzling screen fits on the front of light guide plate.The central portion of reflecting piece fits on the back side of light guide plate.Each first protruding portion is placed between two adjacent second protruding portions, and is bent and then fitted on the outer rim side of light guide plate and the central portion of reflecting piece.Each second protruding portion is placed between two adjacent first protruding portions, and is bent and then fitted on the outer rim side of light guide plate and the shielding part of anti-dazzling screen.The present invention can avoid light leakage and effectively recycle unused light.
Description
Technical field
The present invention relates to a kind of back lighting devices in illuminated keyboard, and especially with regard to avoid light leakage and effectively return
Receive the back lighting device of unused light.
Background technique
Illuminated keyboard has been input peripheral device common on the market.The existing back lighting device for illuminated keyboard, some
Prior art is that the short side or long side by many light sources of quantity (generally light emitting diode) along light guide plate arrange.Separately have
A little its light guide plate of prior art have opening, and light source is placed in the opening of light guide plate.The light that light source is emitted is from leaded light
The inner sidewall of the short side of plate, long side or opening injects light guide plate, and light is guided by light guide plate from being defined on light guide plate just
It projects output optical zone on face.
Referring to Fig. 1, Fig. 1 is painted the partial cross sectional views of the back lighting device 1 of prior art.The back lighting device of prior art
1 includes light guide plate 10, anti-dazzling screen 12 and reflecting piece 14.Light guide plate 10 has front 102 and the back side 104.Prior art
Back lighting device 1 also includes light source (not being illustrated in Fig. 1).Light source is to emit light.It is guide-lighting that light source setting causes light to inject
In plate 10.The light injected in light guide plate 10 is directed to the front 102 of light guide plate 10 by light guide plate 10, and then from light guide plate 10
It projects multiple output optical zones (not being illustrated in Fig. 1) on front 102.
Anti-dazzling screen 12 includes shielding part 122 and the first covering portion 124.Have on the shielding part 122 of anti-dazzling screen 12 multiple
Transmittance section (is not illustrated in Fig. 1).First covering portion 124 of anti-dazzling screen 12 extends outwardly in the edge of shielding part 122.It covers
The output optical zone of the corresponding light guide plate 10 in each transmittance section in portion 122.The shielding part 122 that anti-dazzling screen is 12 fits in light guide plate
On 10 front 102, each transmittance section is caused to be aligned its corresponding output optical zone, the first covering portion 124 of anti-dazzling screen 12 is also hanged
It is hung on except the edge of light guide plate 10.Reflecting piece 14 includes central portion 142 and the second covering portion 144.The second of reflecting piece 14
Covering portion 144 extends outwardly in the edge of central portion 142.The central portion 142 of reflecting piece 14 fits in the back side of light guide plate 10
On 104, the second covering portion 144 of reflecting piece 14 is caused also to hang on except the edge of light guide plate 10.First packet of anti-dazzling screen 12
It covers portion 124 and the second covering portion 144 of reflecting piece 14 fits together.Here, the edge of light guide plate 10 instructs tabula rasa 10 outermost
Its edge of through-hole is formed by the edge or light guide plate 10 of side.
In fact, the back lighting device 1 of prior art is loaded onto group, there are tolerances.It likely results in as shown in Figure 1, anti-dazzling screen
The edge of second covering portion 144 at the edge and reflecting piece 14 of 12 the first covering portion 124 does not fit together to it.Hardening
Viscose 16 can be exposed in the first exposed covering portion 124 or the second covering portion 144 of exposure on, for example, in Fig. 1, firmly
The viscose 16 of change is exposed in the second exposed covering portion 144.Leading scleratogenous viscose 16 becomes the light not used (in Fig. 1
Mark arrow represents the light not used) pipeline that leaks.
Obviously, how the back lighting device of prior art is avoiding light leakage and the design for effectively recycling unused light still has
Improved space.
Summary of the invention
Therefore, the technical issues of present invention is to be solved is to provide a kind of back lighting device in illuminated keyboard.Root
Unused light can be recycled to avoid light leakage and effectively according to back lighting device of the invention.
To solve the above-mentioned problems, the present invention proposes a kind of back lighting device in illuminated keyboard, the light key
Disk includes multiple keys, which includes: light guide plate, light source, anti-dazzling screen and reflecting piece.Light guide plate has front, back
Face and outer rim side, the front define multiple output optical zones thereon, the corresponding key in each output optical zone；Light source is to emit
Light, light source setting cause the light to inject in the light guide plate, which is directed to the front by the light guide plate, so from this
It projects multiple output optical zone on front；Anti-dazzling screen includes shielding part and multiple first protruding portions, is had on the shielding part more
A transmittance section, multiple first protruding portion extend outwardly in the first pre-position of the first edge of the shielding part and each other with
Separately, the corresponding output optical zone in each transmittance section, the shielding part is fitted on the front of the light guide plate and is caused first spacing
Each transmittance section is set to be aligned its corresponding output optical zone；Reflecting piece includes central portion and multiple second protruding portions, and multiple the
Two protruding portions extend outwardly in the second pre-position of the second edge of the central portion and each other with the second spacing separately, should
Second predetermined position corresponds to first predetermined position, which fits on the back side of the light guide plate；Wherein each
First width of one protruding portion is equal to second spacing, and the second width of each the second protruding portion is equal to first spacing, often
One the first protruding portion is placed between two adjacent second protruding portions and bends and then fit in the outer rim side and the center
In portion, each second protruding portion be placed between two adjacent first protruding portions and bend so fit in the outer rim side and
On the shielding part.
As optional technical solution, which is located at two phases of the first edge close to the shielding part
Between adjacent transmittance section.
As optional technical solution, which also includes the first covering portion, and first covering portion is in the shielding part
The first edge extends outwardly except first pre-position, which also includes the second covering portion, second covering portion in
The second edge of the central portion extends outwardly except second pre-position, which is bonded with second covering portion
Together.
As optional technical solution, which also has first through hole, which has the second through-hole thereon, should
Central portion has third through-hole thereon, which all corresponds to the first through hole with the third through-hole, which also includes
Third covering portion and multiple third protruding portions around second through-hole, multiple third protruding portion is at the third covering portion
Extend internally and each other with third spacing separately, which also includes around the 4th covering portion of the third through-hole and more
A 4th protruding portion, multiple 4th protruding portion extend internally at the 4th covering portion and each other with the 4th spacing separately,
The third width of each third protruding portion is equal to the 4th spacing, and the 4th width of each the 4th protruding portion is equal to the third
Spacing, the third covering portion are placed in the first through hole and fit together with the 4th covering portion, each third protruding portion
It is placed between two adjacent 4th protruding portions and bends and then fit in the 4th covering portion, each the 4th protruding portion is placed in
Between two adjacent third protruding portions and bends and then fit in the third covering portion.
As optional technical solution, which further includes multiple smooth steering structures, and multiple light turns to knot
It is configured on the back side and position is below multiple output optical zone, the light of the multiple smooth steering structure of directive to be oriented to
The front, and then projected from the equal output optical zones on the front.
In addition, the present invention also proposes that a kind of back lighting device in illuminated keyboard, the illuminated keyboard include multiple keys,
The back lighting device includes: light guide plate, light source, anti-dazzling screen and reflecting piece.Light guide plate has front, the back side and first through hole,
The front defines multiple output optical zones thereon, the corresponding key in each output optical zone；Light source is to emit light, light source setting
Cause the light to inject in the light guide plate, which is directed to the front by the light guide plate, and then from the front this etc. go out
It projects in light area；Anti-dazzling screen includes shielding part, which has multiple transmittance sections and the second through-hole, each transmittance section thereon
A corresponding output optical zone, second through-hole correspond to the first through hole, which also includes the first packet around second through-hole
Cover portion and multiple first protruding portions, multiple first protruding portion extend internally at first covering portion and each other with first between
Away from separately, which, which fits on the front, causes each transmittance section to be aligned its corresponding output optical zone；Reflecting piece includes
Central portion, the central portion have third through-hole thereon, which corresponds to the first through hole, which also includes to surround to be somebody's turn to do
Second covering portion of third through-hole and multiple second protruding portions, multiple second protruding portion inwardly prolong at second covering portion
Stretch and each other with the second spacing separately, which fits on the back side；Wherein the first of each the first protruding portion is wide
Degree is equal to second spacing, and the second width of each the second protruding portion is equal to first spacing, first covering portion and this
Two covering portion are placed in the first through hole and fit together, each first protruding portion be placed in two adjacent second protruding portions it
Between and bend so fit in second covering portion, each second protruding portion be placed between two adjacent first protruding portions and
It bends and then fits in first covering portion.
As optional technical solution, which also has outer rim side, which also includes that multiple thirds are prominent
Portion, multiple third protruding portion extend outwardly in the first pre-position of the first edge of the shielding part and each other between thirds
Away from separately, which also includes multiple 4th protruding portions, and multiple 4th protruding portion is in the second edge of the central portion
Second pre-position extend outwardly and each other with the 4th spacing separately, second predetermined position correspond to this first pre-determined bit
It sets, the third width of each third protruding portion is equal to the 4th spacing, and the 4th width of each the 4th protruding portion is equal to should
Third spacing, each third protruding portion are placed between two adjacent 4th protruding portions and bend and then fit in the outer rim side
And on the central portion, each the 4th protruding portion is placed between two adjacent third protruding portions and bends and then to fit in this outer
On edge side and the shielding part
As optional technical solution, which is located at two phases of the first edge close to the shielding part
Between adjacent transmittance section.
As optional technical solution, which also includes third covering portion, and the third covering portion is in the shielding part
The first edge extends outwardly except first pre-position, which also includes the 4th covering portion, the 4th covering portion in
The second edge of the central portion extends outwardly except second pre-position, which is bonded with the 4th covering portion
Together.
As optional technical solution, which further includes multiple smooth steering structures, and multiple light turns to knot
It is configured on the back side and position is below multiple output optical zone, the light of the multiple smooth steering structure of directive to be oriented to
The front, and then projected from multiple output optical zone on the front.
Different from prior art, back lighting device of the invention can recycle unused light to avoid light leakage and effectively.
Below in conjunction with the drawings and specific embodiments, the present invention will be described in detail, but not as a limitation of the invention.
Detailed description of the invention
Fig. 1 is the partial sectional view of the back lighting device of prior art.
Signal is unfolded using the component of the illuminated keyboard of the back lighting device of preferred embodiment according to the present invention in Fig. 2
Figure.
Fig. 3 is that the back lighting device of Fig. 2 has assembled and corresponded to the first predetermined position of anti-dazzling screen and the second of reflecting piece makes a reservation for
Partial enlarged view at position.
The back lighting device that Fig. 4 is Fig. 2 has assembled and has corresponded to the first through hole of light guide plate, the second through-hole of anti-dazzling screen and anti-
Partial cross sectional views at the third through-hole of mating plate.
Specific embodiment
The explanation of following embodiment is to can be used to the particular implementation of implementation to illustrate the present invention with reference to additional schema
Example.The direction term that the present invention is previously mentioned, such as "upper", "lower", "front", "rear", "left", "right", " side " etc. are only references
The direction of annexed drawings.Therefore, the direction term used is to illustrate and understand the present invention, rather than to limit the present invention.
In the examples below, in various figures, same section is to be given the same reference numerals.
Please refer to Fig. 2, Fig. 3 and Fig. 4.Fig. 2 with component expanded schematic diagram schematically be painted using according to the present invention one compared with
The illuminated keyboard 2 of the back lighting device 3 of good specific embodiment.Fig. 3 is that the back lighting device 3 of Fig. 2 has assembled and corresponded to anti-dazzling screen 34
First predetermined position 3406 and the partial enlarged view at the second predetermined position 3604 of reflecting piece 36.Fig. 4 is the back lighting device of Fig. 2
3 have assembled and have corresponded to the first through hole 308 of light guide plate, the second through-hole 3408 of anti-dazzling screen 34 and the third through-hole of reflecting piece 36
Partial cross sectional views at 3606.
As shown in Fig. 2, including substrate 22, back lighting device of the invention using the illuminated keyboard 2 of back lighting device 3 of the invention
3 and keypad portion 20.Back lighting device 3 is set on substrate 22, and keypad portion 20 is set on back lighting device 3.Keypad portion 20 includes
Multiple keys 202.
The back lighting device 3 of preferred embodiment according to the present invention include light guide plate 30, light source 32, anti-dazzling screen 34 and
Reflecting piece 36.
Light guide plate 30 has front 300, the back side 302 and outer rim side 304.It is defined on the front 300 of light guide plate 30 more
A output optical zone 306.Each output optical zone 306 corresponds to a key 202.It must state herein, multiple output optical zones 306 and non-physical knot
Structure, but scheduled region.
In a specific embodiment, light guide plate 30 can be by acryl, silica resin (silicone), thermoplastic poly amido
Formic acid esters (thermoplastic polyurethane, TPU) or other commercializations are led made by the good high molecular material of optical activity.
Light source 32 is to emit light.The setting of light source 32 causes light to inject in light guide plate 30.For example, being demonstrated in Fig. 2
In example, light guide plate 30 also has multiple openings 303.Multiple opening 303 is formed on the back side 302 of light guide plate 30, and is leaned on
The outer rim side 301 of the long side of nearly light guide plate 30.In Fig. 1, it is multiple opening 303 close to light guide plate 30 long side 301, but
The present invention is not limited thereto.Each opening 303 has a incidence surface certainly.Light source 32 includes circuit board 322 and multiple
Luminescence component 324.Multiple luminescence components 324 are electrically connected on circuit board 322.Each luminescence component 324 corresponding one is opened
Mouth 303.Light source 32 is set on the back side 302 of light guide plate 30, each luminescence component 324 is caused to be placed in its corresponding opening
In 303.In Fig. 2, reflecting piece 36 has perforative opening 3608, and light source 32 is placed in opening 3608.Each group that shines
The light that part 324 is emitted injects light guide plate 30 from the incidence surface of its corresponding opening 303, and conducts in light guide plate 30.
Light source 32, which also can be set, abuts the outer of the long side of light guide plate 30 against the outer rim side 304 of the short side of light guide plate 30, or setting
Edge side 301.
In a specific embodiment, circuit board 322 can be flexible circuit board, but the present invention is not limited thereto.
In a specific embodiment, each luminescence component 324 can be semiconductor light-emitting-diode or organic light emission two
Pole pipe, but the present invention is not limited thereto.
The light injected in light guide plate 30 is directed to the front 300 of light guide plate 30 by light guide plate 30, and then from light guide plate 30
Front 300 on multiple output optical zone 306 project.
Further, the back lighting device 3 according to the present invention being preferably embodied also includes multiple smooth steering structures 38.It is multiple
Light steering structure 38 is formed on the back side 302 of light guide plate 30, and above-mentioned multiple smooth steering structures 38 are in multiple output optical zones
306 lower sections, to by the front 300 of the light of the multiple smooth steering structures 38 of directive guiding light guide plate 30, and then from light guide plate 30
Front 300 on multiple output optical zone 306 project.
In a specific embodiment, multiple smooth steering structures 38 can print dotted light on the back side of light guide plate 30 302
Color (for example, white) ink is formed, and can also use micro-structure (micro-lens), can also use plated film mode and light guide plate 30
It is integrally formed.But the formation of multiple smooth steering structures 38 is not limited with above-mentioned processing procedure.
As shown in Figures 2 and 3, anti-dazzling screen 34 includes shielding part 340 and multiple first protruding portions 341.Anti-dazzling screen 34
There are multiple transmittance sections 3402 on shielding part 340.Multiple transmittance sections 3402 can be engraved structure, but be not limited thereto.It hides
Multiple first protruding portions 341 of mating plate 34 are in the first predetermined position of the first edge 3404 of the shielding part 340 of anti-dazzling screen 34
Extend outwardly at 3406, and each other with the first spacing d1 separately.Each transmittance section 3402 corresponds to an output optical zone 306.
The shielding part 340 of anti-dazzling screen 34 fits on the front 300 of light guide plate 30, and causing the alignment of each transmittance section 3402, its is corresponding
Output optical zone 306.
Same as shown in Figures 2 and 3, reflecting piece 36 includes central portion 360 and multiple second protruding portions 361.Reflecting piece
36 multiple second protruding portions 361 are at the second predetermined position 3604 of the second edge 3602 of the central portion 360 of reflecting piece 36
Extend outwardly, and each other with the second spacing d2 separately.Second predetermined position 3604 corresponds to the first predetermined position 3406.It is reflective
The central portion 360 of piece 36 fits on the back side 302 of light guide plate 30.
As shown in figure 3, the first width w1 of each the first protruding portion 341 of anti-dazzling screen 34 is equal to the second spacing d2, instead
Second width w2 of each the second protruding portion 361 of mating plate 36 is equal to the first spacing d1.Each of anti-dazzling screen 34 is first prominent
Portion 341 is placed between second protruding portion 361 of two adjacent reflecting pieces 36 out, and is bent and then fitted in the outer of light guide plate 30
On the central portion 360 of edge side 304 and reflecting piece 36.Each second protruding portion 361 of reflecting piece 36 be placed in two it is adjacent
Between first protruding portion 341 of anti-dazzling screen 34, and bend and then fit in outer rim side 304 and the anti-dazzling screen of light guide plate 30
On 34 shielding part 340.Whereby, at 3 directive the first protruding portion 341 of back lighting device and the second protruding portion 361 according to the present invention
Light will not leak, the light not used can effectively recycling and reusing.
In a specific embodiment, as shown in Fig. 2, the first predetermined position 3406 is located at the shielding part close to anti-dazzling screen 34
Between the adjacent transmittance section 3402 of two of 340 first edge 3404.After back lighting device 3 according to the present invention assembles, first is pre-
Positioning sets 3406 also between two adjacent transmittance sections 3402 of the outer rim side 304 of output optical zone 306.General feelings
Condition, the interior light utilization rate conducted between adjacent output optical zone 306 two-by-two of light guide plate 30 is lower, must effectively recycle.
In a specific embodiment, as shown in Figures 2 and 3, the back lighting device 3 according to the present invention being preferably embodied
Anti-dazzling screen 34 also includes the first covering portion 342.First covering portion 342 of anti-dazzling screen 34 is in the first edge 3404 of shielding part 340
Except extending outwardly at the first predetermined position 3406.Reflecting piece 36 also includes the second covering portion 362.Second covering portion of reflecting piece 36
362 in central portion 360 second edge 3602 except extending outwardly at the second predetermined position 3604.First covering portion of anti-dazzling screen 34
342 fit together with the second covering portion 362 of reflecting piece 36.
In another specific embodiment, the anti-dazzling screen 34 of the back lighting device 3 according to the present invention being preferably embodied is not wrapped
Containing the first covering portion 342, reflecting piece 36 does not include the second covering portion 362, and multiple first protruding portions 341 are around shielding part 340
All first edges 3404, all second edges 3602 of multiple second protruding portions 361 around central portion 360.
In another specific embodiment, between the adjacent transmittance section 3402 of two of the first edge 3404 of shielding part 340 all
There are multiple first protruding portions 341 to extend outwardly.Reflecting piece 36 also has multiple second protruding portions 361 to extension in corresponding position
It stretches.
Further, as shown in Figures 2 and 4, the light guide plate 30 of the back lighting device 3 according to the present invention being preferably embodied is gone back
With first through hole 308.There is the second through-hole 3408 on the shielding part 340 of anti-dazzling screen 34.Have on the central portion 360 of reflecting piece 36
There is third through-hole 3606.Second through-hole 3408 of shielding part 340 all corresponds to light guide plate 30 with the third through-hole 3606 of central portion 360
First through hole 308.Correspondingly, positioning column 222 is formed on substrate 22.Positioning column 222 is logical across first through hole 308, second
Hole 3408 and third through-hole 3606.In practical application, multiple positioning columns 222, correspondingly, light guide plate are formed on substrate 22
30 have multiple first through hole 308, have multiple second through-holes 3408 on shielding part 340, and have on central portion 360 multiple
Third through-hole 3606.In Fig. 2, it is only painted 308, second through-holes 3408 of a first through hole and a third through-hole
3606 as representative.
It is clear to express in Fig. 4, it is only painted part light guide plate 30, part anti-dazzling screen 34 and part reflecting piece 36, the
The rest part of one through-hole 308, the second through-hole 3408 and third through-hole 3606 is represented by dotted lines.As shown in figure 4, anti-dazzling screen 34
Also comprising the third covering portion 343 for surrounding the second through-hole 3408 and multiple third protruding portions 344.Multiple thirds of anti-dazzling screen 34
Protruding portion 344 extends internally at the third covering portion 343 of anti-dazzling screen 34, and each other with third spacing d3 separately.It is reflective
Piece 36 is also comprising the 4th covering portion 363 for surrounding third through-hole 3606 and multiple 4th protruding portions 364.Reflecting piece 36 it is multiple
4th protruding portion 364 extends internally at the 4th covering portion 363 of reflecting piece 36, and each other with the 4th spacing d4 separately.
The third width w3 of each third protruding portion 344 of anti-dazzling screen 34 is equal to the 4th spacing d4.Reflecting piece 36 each the 4th
4th width w4 of protruding portion 364 is equal to third spacing d3.The third covering portion 343 of anti-dazzling screen 34 and the 4th packet of reflecting piece 36
It covers portion 363 to be placed in the first through hole 308 of light guide plate 30, and fits together.Each third protruding portion of anti-dazzling screen 34
344 are placed between the 4th protruding portion 364 of two adjacent reflecting pieces 36, and bend and then fit in the 4th packet of reflecting piece 36
It covers in portion 363.Each the 4th protruding portion 364 of reflecting piece 36 be placed in two adjacent anti-dazzling screens 34 third protruding portion 344 it
Between, and bend and then fit in the third covering portion 343 of anti-dazzling screen 34.Whereby, 3 directive of back lighting device according to the present invention
Light at the first through hole 308 of light guide plate 30 will not leak, and the light not used can effectively recycling and reusing.
By to detailed description of the invention, being apparent that back lighting device of the invention to avoid light leakage and can have above
Effect recycles unused light.
By the above detailed description of preferred embodiments, it is intended to more clearly describe feature and spirit of the invention,
And not protection scope of the present invention is limited with above-mentioned disclosed preferred embodiment.On the contrary, its purpose
It is intended to cover various changes and has being arranged in the scope of protection of the claims of the invention to be applied of equality.Cause
This, scope of protection of the claims of the invention should illustrate the most wide explanation of work according to above-mentioned, to cause it to cover institute
Possible change and the arrangement of tool equality.
Claims (10)
1. a kind of back lighting device in illuminated keyboard, which includes multiple keys, it is characterised in that backlight dress
It sets and includes:
Light guide plate there is front, the back side and outer rim side, the front to define multiple output optical zones thereon, each output optical zone pair
Answer a key；
Light source, to emit light, light source setting causes the light to inject in the light guide plate, which is guided by the light guide plate
It is projected to the front, and then from multiple output optical zone on the front；
Anti-dazzling screen includes shielding part and multiple first protruding portions, has multiple transmittance sections on the shielding part, and multiple first is prominent
Out portion extend outwardly in the first pre-position of the first edge of the shielding part and each other with the first spacing separately, each
Transmittance section corresponds to an output optical zone, which fits on the front of the light guide plate that cause each transmittance section to be aligned its right
The output optical zone answered；And
Reflecting piece includes central portion and multiple second protruding portions, and multiple second protruding portion is in the second edge of the central portion
The second pre-position extend outwardly and each other with the second spacing separately, second predetermined position correspond to this first pre-determined bit
It sets, which fits on the back side of the light guide plate；
Wherein the first width of each the first protruding portion is equal to second spacing, second width of each the second protruding portion etc.
In first spacing, each first protruding portion is placed between two adjacent second protruding portions and bends and then fit in the outer rim
On side and the central portion, each second protruding portion is placed between two adjacent first protruding portions and bends and then fit in
On the outer rim side and the shielding part.
2. back lighting device according to claim 1, it is characterised in that: first predetermined position is located at close to the shielding part
Between two adjacent transmittance sections of the first edge.
3. back lighting device according to claim 2, it is characterised in that: the anti-dazzling screen also includes the first covering portion, this first
Covering portion removes first pre-position in the first edge of the shielding part and extends outwardly, which also includes the second cladding
Portion, second covering portion remove second pre-position in the second edge of the central portion and extend outwardly, first covering portion
It fits together with second covering portion.
4. back lighting device according to claim 3, it is characterised in that: the light guide plate also has first through hole, the shielding part
There is the second through-hole thereon, which has third through-hole thereon, second through-hole and the third through-hole all correspond to this first
Through-hole, the anti-dazzling screen also include the third covering portion and multiple third protruding portions around second through-hole, and multiple third is prominent
Out portion extend internally at the third covering portion and each other with third spacing separately, which also includes logical around the third
4th covering portion in hole and multiple 4th protruding portions, multiple 4th protruding portion extends internally at the 4th covering portion and that
This separately with the 4th spacing, the third width of each third protruding portion is equal to the 4th spacing, each the 4th protruding portion
The 4th width be equal to the third spacing, the third covering portion and the 4th covering portion are placed in the first through hole and are fitted in one
It rising, each third protruding portion is placed between two adjacent 4th protruding portions and bends and then fit in the 4th covering portion,
Each the 4th protruding portion is placed between two adjacent third protruding portions and bends and then fit in the third covering portion.
5. back lighting device according to claim 3, it is characterised in that: the back lighting device further includes:
Multiple smooth steering structures, are formed on the back side and position is below multiple output optical zone, to turn the multiple light of directive
It is oriented to the front to the light of structure, and then is projected from the equal output optical zones on the front.
6. a kind of back lighting device in illuminated keyboard, which includes multiple keys, it is characterised in that backlight dress
It sets and includes:
Light guide plate there is front, the back side and first through hole, the front to define multiple output optical zones thereon, each output optical zone pair
Answer a key；
Light source, to emit light, light source setting causes the light to inject in the light guide plate, which is guided by the light guide plate
It is projected to the front, and then from the equal output optical zones on the front；
Anti-dazzling screen includes shielding part, which has multiple transmittance sections and the second through-hole thereon, each transmittance section is corresponding
One output optical zone, second through-hole correspond to the first through hole, which also includes the first covering portion around second through-hole
And multiple first protruding portions, multiple first protruding portion extend internally at first covering portion and each other with the first spacing phases
Interval, which, which fits on the front, causes each transmittance section to be aligned its corresponding output optical zone；And
Reflecting piece includes central portion, which has third through-hole thereon, which corresponds to the first through hole, this is anti-
Mating plate also includes the second covering portion and multiple second protruding portions around the third through-hole, multiple second protruding portion in this
Extend internally at two covering portion and each other with the second spacing separately, which fits on the back side；
Wherein the first width of each the first protruding portion is equal to second spacing, second width of each the second protruding portion etc.
In first spacing, which is placed in the first through hole and fits together with second covering portion, each the
One protruding portion is placed between two adjacent second protruding portions and bends and then fit in second covering portion, each is second prominent
Portion is placed between two adjacent first protruding portions and bends and then fit in first covering portion out.
7. back lighting device according to claim 6, it is characterised in that: the light guide plate also has outer rim side, the anti-dazzling screen
It also include multiple third protruding portions, multiple third protruding portion is outside in the first pre-position of the first edge of the shielding part
Extend and each other with third spacing separately, which also includes multiple 4th protruding portions, and multiple 4th protruding portion is in this
Second pre-position of the second edge of central portion extend outwardly and each other with the 4th spacing separately, second predetermined position
The third width in corresponding first predetermined position, each third protruding portion is equal to the 4th spacing, each the 4th protruding portion
The 4th width be equal to the third spacing, each third protruding portion is placed between two adjacent 4th protruding portions and bends in turn
It fits on the outer rim side and the central portion, each the 4th protruding portion is placed between two adjacent third protruding portions and curved
It folds into and fits on the outer rim side and the shielding part.
8. back lighting device according to claim 7, it is characterised in that: first predetermined position is located at close to the shielding part
Between two adjacent transmittance sections of the first edge.
9. back lighting device according to claim 8, it is characterised in that: the anti-dazzling screen also includes third covering portion, the third
Covering portion removes first pre-position in the first edge of the shielding part and extends outwardly, which also includes the 4th cladding
Portion, the 4th covering portion remove second pre-position in the second edge of the central portion and extend outwardly, the third covering portion
It fits together with the 4th covering portion.
10. back lighting device according to claim 9, it is characterised in that: the back lighting device further includes:
Multiple smooth steering structures, are formed on the back side and position is below multiple output optical zone, to turn the multiple light of directive
It is oriented to the front to the light of structure, and then is projected from multiple output optical zone on the front.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810918624.XA CN109036928B (en) | 2018-08-13 | 2018-08-13 | Backlight device for use in luminous keyboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810918624.XA CN109036928B (en) | 2018-08-13 | 2018-08-13 | Backlight device for use in luminous keyboard |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109036928A true CN109036928A (en) | 2018-12-18 |
| CN109036928B CN109036928B (en) | 2020-08-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810918624.XA Active CN109036928B (en) | 2018-08-13 | 2018-08-13 | Backlight device for use in luminous keyboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109036928B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109887789A (en) * | 2019-01-29 | 2019-06-14 | 苏州达方电子有限公司 | Luminous button and illuminated keyboard comprising the luminous button |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09292533A (en) * | 1996-04-26 | 1997-11-11 | Casio Comput Co Ltd | Lighting device |
| CN201417429Y (en) * | 2009-03-30 | 2010-03-03 | 苏州达方电子有限公司 | Illumination keyboard |
| CN203617190U (en) * | 2013-11-26 | 2014-05-28 | 源曜光电股份有限公司 | Keyboard light-emitting module |
| CN204062675U (en) * | 2014-08-01 | 2014-12-31 | 闳晖实业股份有限公司 | Backlight module |
-
2018
- 2018-08-13 CN CN201810918624.XA patent/CN109036928B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09292533A (en) * | 1996-04-26 | 1997-11-11 | Casio Comput Co Ltd | Lighting device |
| CN201417429Y (en) * | 2009-03-30 | 2010-03-03 | 苏州达方电子有限公司 | Illumination keyboard |
| CN203617190U (en) * | 2013-11-26 | 2014-05-28 | 源曜光电股份有限公司 | Keyboard light-emitting module |
| CN204062675U (en) * | 2014-08-01 | 2014-12-31 | 闳晖实业股份有限公司 | Backlight module |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109887789A (en) * | 2019-01-29 | 2019-06-14 | 苏州达方电子有限公司 | Luminous button and illuminated keyboard comprising the luminous button |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109036928B (en) | 2020-08-18 |
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