CN203377146U - Backlight device and illuminating keyboard using backlight device - Google Patents

Backlight device and illuminating keyboard using backlight device Download PDF

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Publication number
CN203377146U
CN203377146U CN201320336731.4U CN201320336731U CN203377146U CN 203377146 U CN203377146 U CN 203377146U CN 201320336731 U CN201320336731 U CN 201320336731U CN 203377146 U CN203377146 U CN 203377146U
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CN
China
Prior art keywords
light
ink layer
lighting device
color ink
illuminated keyboard
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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.)
Expired - Lifetime
Application number
CN201320336731.4U
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Chinese (zh)
Inventor
何信政
梁仕升
姚良瑜
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Darfon Electronics Suzhou Co Ltd
Darfon Electronics Corp
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Darfon Electronics Suzhou Co Ltd
Darfon Electronics Corp
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Priority to CN201320336731.4U priority Critical patent/CN203377146U/en
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Abstract

The utility model relates to a backlight device and an illuminating keyboard using the backlight device. The backlight device comprises a light guide plate, an ink layer, a light source, and a reflection structure. The ink layer is printed on the front of the light guide plate or the back of the light guide plate, and has colors. The light source is disposed to be close to the light guide plate, and used for transmitting a light ray. The light ray irradiates into the light guide plate and transmits inside the light guide plate. A part of the light ray irradiates the ink layer, and is converted into first colored light by the ink layer and reflected. The reflection structure is disposed on the back of the light guide plate, and used for guiding the light ray, irradiating the reflection structure, and the first colored light to the front surface, so as to irradiate out from the front surface. The backlight device can enable the illuminating keyboard to show different colors in partitions, thereby showing colorful visual effects. The backlight device provided by the utility model is easy to manufacture, and the color of the light ray is easy to change in design.

Description

Back lighting device and use its illuminated keyboard
Technical field
The utility model relates to a kind of back lighting device and uses its illuminated keyboard, and particularly about utilizing simple structure to carry out the back lighting device of variable color, mixed light to former incident light and using its illuminated keyboard.
Background technology
Along with user's user demand increases, keyboard no longer only is to provide simple input peripheral device, the function of auxiliary input and attractive in appearance also have required.At present existingly on the market provide keyboard backlight, can allow the user is clear under back lighting inerrably understands key position, unlikely input error, or attractive in appearance on sense organ.
The keyboard that multicolor backlight can be provided is also arranged on the market, and it also has the function of the specific keys of providing except above-mentioned functions is arranged, and auxiliary input function is more promoted.
Refer to Fig. 1, the schematic partial cross-sectional view of the illuminated keyboard 1 that Fig. 1 is prior art.Illuminated keyboard 1 comprises light guide plate 16, base plate 13, button 14, elastomer 15, thin film switch layer 19, reflecting piece 17 and anti-dazzling screen 18.Elastomer 15 comprises start post 150.After user's pressing keys 14, elastomer 15 is subject to button 14 extruding.And then start post 150 compressing thin film switch layers 19, allow circuit turn-on in thin film switch layer 19, illuminated keyboard 1 is sent the signal specific of corresponding button 14 to host computer.After the user discharges button 14, can get back to original position by button 14 by the elastic-restoring force of elastomer 15.In addition, base plate 13 is in order to support keys 14, and comprises the transparent area 130 be positioned under button 14.
Anti-dazzling screen 18 has transmittance section 180, and different colours is coated respectively in different transmittance sections 180.After the light source emitted light is injected light guide plate 16, part light is via reflector plate 17 is reflected back to light guide plate 16, and part light is in light guide plate 16 conducted inside.Afterwards, by light guide plate 16, derive light by anti-dazzling screen 18, to produce different color light, different color light passes through the transparent area 130 of base plate 13 again, last directive button 14.And then illuminated keyboard 1 can send different color light.Can know and find out from Fig. 1, this kind of mode must be reached and produce the backlight of multiple color with extra member (namely, anti-dazzling screen 18).Yet more parts, except increasing cost of parts, also mean more assembly errors, more fraction defectives.Along with the light guide plate of back lighting device attenuate all the more, back lighting device is also without the space that adopts anti-dazzling screen.
In addition, many light-emitting diodes that send different color light of employing are also arranged so that multicolor backlight to be provided.But, this kind of way framework complexity, cost costliness.
Have not yet to see simple in structurely, the back lighting device with former incident light different colours light can be provided.
The utility model content
Therefore, the technical problem that the utility model institute wish solves is to provide a kind of back lighting device for illuminated keyboard, and back lighting device of the present utility model is to utilize simple structure former incident light to be carried out to the back lighting device of variable color, mixed light, so that the light with former incident light different colours to be provided, even provide the subregion different color light to show.
To achieve these goals, the utility model proposes a kind of back lighting device for illuminated keyboard, this back lighting device comprises light guide plate, the first color ink layer, light source and catoptric arrangement.Light guide plate has front and the back side; The first color ink layer is printed on this front or this back side; Contiguous this light guide plate of light source arranges, and in order to emission of light, this light is injected this light guide plate and conducted in this light guide plate, and wherein the some of this light is irradiated this first color ink layer, by this first color ink layer, is transformed into the first coloured light reflection; Catoptric arrangement is arranged on this back side, in order to this light by this catoptric arrangement of directive and this first coloured light this front of leading, and then penetrates from this front.
As optional technical scheme, this first color ink layer is the strip ink layer, and this first color ink layer is near this light source.
As optional technical scheme, this back lighting device also comprises reflector plate, and this reflector plate is attached on this back side, in order to assist this light of reflection and this first coloured light.
As optional technical scheme, this back lighting device also comprises the second color ink layer, this the second color ink layer is printed on this front or this back side, the color of this second color ink layer is different from the color of this first color ink layer, wherein another of this light partly irradiates this second color ink layer, be transformed into the second coloured light reflection by this second color ink layer, this catoptric arrangement this front of also this second coloured light of this catoptric arrangement of directive being led, and then penetrate from this front.
As optional technical scheme, this second color ink layer is the strip ink layer.
As optional technical scheme, this catoptric arrangement is point-like printing ink.
As optional technical scheme, this light source is white light source.
Different from prior art, the simple structure of back lighting device utilization of the present utility model can provide the light with former incident light different colours, and even the subregion different color light shows, easy to manufacture, and can easily change the light of required color in its design.
In addition, the utility model also proposes a kind of illuminated keyboard, and this illuminated keyboard comprises back lighting device, and this back lighting device comprises light guide plate, the first color ink layer, light source and catoptric arrangement.Light guide plate has front and the back side; The first color ink layer is printed on this front or this back side; Contiguous this light guide plate of light source arranges, and in order to emission of light, this light is injected this light guide plate and conducted in this light guide plate, and wherein the some of this light is irradiated this first color ink layer, by this first color ink layer, is transformed into the first coloured light reflection; Catoptric arrangement is arranged on this back side, in order to this light by this catoptric arrangement of directive and this first coloured light this front of leading, and then penetrates from this front.
As optional technical scheme, this first color ink layer is the strip ink layer, and this first color ink layer is near this light source.
As optional technical scheme, this back lighting device also comprises reflector plate, and this reflector plate is attached on this back side, in order to assist this light of reflection and this first coloured light.
As optional technical scheme, this back lighting device also comprises the second color ink layer, this the second color ink layer is printed on this front or this back side, the color of this second color ink layer is different from the color of this first color ink layer, wherein another of this light partly irradiates this second color ink layer, be transformed into the second coloured light reflection by this second color ink layer, this catoptric arrangement this front of also this second coloured light of this catoptric arrangement of directive being led, and then penetrate from this front.
As optional technical scheme, this second color ink layer is the strip ink layer.
As optional technical scheme, this catoptric arrangement is point-like printing ink.
As optional technical scheme, this light source is white light source.
As optional technical scheme, this illuminated keyboard also comprises base plate, supporting construction and keycap, and this base plate is arranged on this back lighting device, and this supporting construction is installed on this base plate, this keycap is installed on this supporting construction, and this keycap of this support construction supports is done moving both vertically with respect to this base plate.
As optional technical scheme, this illuminated keyboard also comprises elastic actuator, the restoring force that this elastic actuator provides keycap to move both vertically, and wherein this elastic actuator is transparent or translucent elastic actuator.
Illumination keyboard structure of the present utility model is simple, and the light with former incident light different colours can be provided.Its back lighting device comprised even can allow illuminated keyboard present the different color light demonstration at subregion, presents multicoloured visual effect.Illuminated keyboard of the present utility model, easy to manufacture, and it designs the light that can easily change required color.
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail, but not as to restriction of the present utility model.
The accompanying drawing explanation
The schematic partial cross-sectional view of the illuminated keyboard that Fig. 1 is prior art;
The vertical view of the back lighting device that Fig. 2 is a preferred embodiment of the present utility model;
Fig. 3 be in Fig. 2 back lighting device along the schematic partial cross-sectional view of A-A line and on the schematic partial cross-sectional view of illuminated keyboard.
Embodiment
Refer to Fig. 2 and Fig. 3.Fig. 2 schematically illustrates the back lighting device 2 of a preferred embodiment of the present utility model with vertical view.Back lighting device 2 of the present utility model is for illuminated keyboard 3.Fig. 3 is that in Fig. 2, back lighting device 2 is along the fragmentary sectional view of A-A line, and the schematic partial cross-sectional view of the illuminated keyboard 3 on it also is shown in Fig. 3.
As shown in Figures 2 and 3, back lighting device 2 of the present utility model comprises light guide plate 20, the first color ink layer 24, white light source 22 and catoptric arrangement 26.Light guide plate 20 has light inlet side 202, front 204 and the back side 206.Light inlet side 202 is as the incidence surface of white light source 22 emission of lights.Light guide plate 20 its fronts 204 shown in Fig. 2 are rectangularity substantially, but, in practical operation, the shape of light guide plate 20 is not limited with rectangle.
In a specific embodiment, light guide plate 20 can be made by acryl, silica resin (silicone), thermoplastic poly amido formate (thermoplastic polyurethane, TPU) or other commercial leaded light macromolecular materials.The layer thickness of light guide plate 20 can be determined according to need, is not particularly limited.For example, while being applied to the thin-type light emitting button, the thickness range of light guide plate 20 is about 0.125mm～0.25mm.
The first color ink layer 24 is printed on the front 204 or the back side 206 of light guide plate 20, and has the first color.In the example shown in Fig. 2 and Fig. 3, the first color ink layer 24 is printed on the front 204 of light guide plate 20.
The contiguous light guide plate 20 of white light source 22 arranges, i.e. contiguous light inlet side 202.White light source 22 can be light-emitting diode (light-emitting diode, LED) device, but the utility model is not as limit.White light source 22 can be also other light-emitting devices, for example, and cathode fluorescent tube (cold cathode fluorescent lamp, CCFL).
White light source 22 is in order to transmitting white, injects light guide plate 20 and in the interior conduction of light guide plate 20.As shown in Figure 3, white light source 22 is to be placed in obliquely light inlet side 202 sides, causes the some of white light to irradiate the first color ink layer 24, via the first color ink layer 24, is transformed into the first coloured light reflection.
Catoptric arrangement 26 is arranged on the back side 206 of light guide plate 20.Catoptric arrangement 26 is in order to the front 204 of the white light by directive catoptric arrangement 26 and the first coloured light guiding light guide plate 20, and then penetrates from the front 204 of light guide plate 20.
In a specific embodiment, catoptric arrangement 26 can be overleaf on 206 printing point-like light color (for example, white) printing ink form, also can use micro-reflection structure (micro lens), also can use plated film mode and light guide plate 20 one-body molded.But the formation of catoptric arrangement 26 is not limited with above-mentioned processing procedure.
Illuminated keyboard 3 of the present utility model comprises a plurality of buttons that are installed on back lighting device 2.In Fig. 3, only illustrate a button as representative.Illuminated keyboard 3 of the present utility model comprises base plate 30, thin film switch 32, keycap 34, supporting construction 36 and elastic actuator 38.Supporting construction 36 is installed on base plate 30, forms on base plate 30 and assists the fixing structure of supporting construction 36.Keycap 34 is installed on supporting construction 36.Supporting construction 36 supports the vertical movement that keycap 34 is done with respect to thin film switch 32.As shown in Figure 3, supporting construction 18 can be scissor structure, but not as limit.
Thin film switch 32 is consisted of upper film circuit 322 and lower thin film circuit 324, and by insulating element 326, upper film circuit 322 and lower thin film circuit 324 is separated.Elastic actuator 38 is arranged on upper film circuit 322.As shown in Figure 3, elastic actuator 38 can be Elastic Circular acrosome (resilient dome), but not as limit.External force is applied on keycap 34 so that keycap 34 moves towards upper film circuit 322.Elastic actuator 38 produces distortion along with the movement of keycap 34, moves towards lower thin film circuit 324 to activate 322 distortion of upper film circuit, and then opens thin film switch 32.
Base plate 30 has the first transparent area 302, has the second transparent area 342 on keycap 34.In the actual product design, the first transparent area 302 can be a through hole.When light is derived from light guide plate 20, sequentially by the second transparent area 342 of the first transparent area 302, thin film switch 32, elastic actuator 38 and keycap 34.Elastic actuator 38 can consist of transparent or semitransparent material, allow light can be directly by elastic actuator 38 to arrive the second transparent area 342 of keycap 34, or light by elastic actuator 38 diffusions to illuminate around keycap 34 and to allow by the light of the second transparent area 342 comparatively soft.If symbol or letter on the corresponding keycap 34 of the second transparent area 342, allow the second transparent area 342 represent the zone at this symbol or alphabetical place.Therefore, when environment light source is faint, illuminated keyboard 3 can make different buttons be easy to differentiate, and facilitates user's input data.Supplementary notes, if base plate 30 by the light-permeable material, made, the first transparent area 302 can be not with the form of through hole it.The zone of base plate 30 outside the first transparent area 302 also allowed, and the mode that sees through a little light designs, so that the backlight effect with respect to the first transparent area 302 to be provided.
In a specific embodiment, the first color ink layer 24 is the strip ink layer, and near white light source 22, as shown in Figure 2.In an example, the first color ink layer 24 is strip red ink layer, and the light of directive the first transparent area 302 and the second transparent area 342 is pink or light red coloured light.Back lighting device 2 its structures of the present utility model are quite simple.If consider in design the color of change directive the first transparent area 302 and the second transparent area 342 light, on manufacturing, only need the color that changes the first color ink layer 24 to reach.It should be noted that, because the light source in the present embodiment is white light source, white light runs into the red ink layer, pulverize red light or light red coloured light.In practical operation, if light source is yellow light sources, the first color ink layer 24 is the blue ink layer, and yellow light runs into the blue ink layer, likely becomes green light, and the user can select the color of light source and ink layer according to actual needs, not as limit.
Further, as shown in Figure 3, back lighting device 2 of the present utility model also comprises reflector plate 29.Reflector plate 29 is attached on the back side 206 of light guide plate 20, in order to assist reflected white-light and the first coloured light.
Further, as shown in Figures 2 and 3, back lighting device 2 of the present utility model also comprises the second color ink layer 28.The second color ink layer 28 is printed on the front 204 or the back side 206 of light guide plate 20, and has the second color.In the example shown in Fig. 2 and Fig. 3, the second color ink layer 28 is printed on the front 204 of light guide plate 20.The second printing ink 28 correspondences are installed in another button (not being illustrated in Fig. 3) on back lighting device 2.
Another of white light partly irradiates the second color ink layer 28, by the second color ink layer 28, is transformed into the second coloured light reflection.Corresponding catoptric arrangement 26 is also by the front 204 of the second coloured light guiding light guide plate 20 of directive catoptric arrangement 26, and then 204 ejaculations from front, then the button of corresponding the second color ink layer 28 of directive.
In a specific embodiment, the color of the second color ink layer 28 differs from the first color ink layer 24, allows back lighting device 2 can present in the zones of different of illuminated keyboard 3 different coloured light, more different colours Se district, and whole color and visual effect are better.Certainly, if only need to present monochromatic light, the color relation of the second color ink layer 28 is identical with the color of the first color ink layer 24.
In a specific embodiment, the second color ink layer 28 is the strip ink layer, and while overlooking back lighting device 2 substantially, the second color ink layer 28 is parallel to light inlet side 202, as shown in Figure 2.
In sum, can fully understand back lighting device of the present utility model and use its illuminated keyboard that it is simple in structure, the light with former incident light different colours can be provided.Back lighting device of the present utility model and use its illuminated keyboard even can allow illuminated keyboard present different color light at subregion to show, present multicoloured visual effect.Back lighting device of the present utility model and use its illuminated keyboard, easy to manufacture, and can easily change the light of required color in its design.
Certainly; the utility model also can have other various embodiments; in the situation that do not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the utility model.

Claims (10)

1. the back lighting device for illuminated keyboard is characterized in that this back lighting device comprises:
Light guide plate, have front and the back side;
The first color ink layer, be printed on this front or this back side;
Light source, contiguous this light guide plate arranges, and in order to emission of light, this light is injected this light guide plate and is conducted in this light guide plate, and wherein the some of this light is irradiated this first color ink layer, by this first color ink layer, is transformed into the first coloured light reflection; And
Catoptric arrangement, be arranged on this back side, in order to this light by this catoptric arrangement of directive and this first coloured light this front of leading, and then penetrates from this front.
2. the back lighting device for illuminated keyboard according to claim 1, it is characterized in that: this first color ink layer is the strip ink layer, and this first color ink layer is near this light source.
3. the back lighting device for illuminated keyboard according to claim 1, it is characterized in that: this back lighting device also comprises reflector plate, and this reflector plate is attached on this back side, in order to assist this light of reflection and this first coloured light.
4. the back lighting device for illuminated keyboard according to claim 1, it is characterized in that: this back lighting device also comprises the second color ink layer, this the second color ink layer is printed on this front or this back side, the color of this second color ink layer is different from the color of this first color ink layer, wherein another of this light partly irradiates this second color ink layer, be transformed into the second coloured light reflection by this second color ink layer, this catoptric arrangement this front of also this second coloured light of this catoptric arrangement of directive being led, and then penetrate from this front.
5. the back lighting device for illuminated keyboard according to claim 4, it is characterized in that: this second color ink layer is the strip ink layer.
6. the back lighting device for illuminated keyboard according to claim 1, it is characterized in that: this catoptric arrangement is point-like printing ink.
7. the back lighting device for illuminated keyboard according to claim 1, it is characterized in that: this light source is white light source.
8. an illuminated keyboard, is characterized in that this illuminated keyboard comprises back lighting device as claimed in any of claims 1 to 7 in one of claims.
9. illuminated keyboard according to claim 8, it is characterized in that: this illuminated keyboard also comprises base plate, supporting construction and keycap, this base plate is arranged on this back lighting device, this supporting construction is installed on this base plate, this keycap is installed on this supporting construction, and this keycap of this support construction supports is done moving both vertically with respect to this base plate.
10. illuminated keyboard according to claim 9, it is characterized in that: this illuminated keyboard also comprises elastic actuator, the restoring force that this elastic actuator provides keycap to move both vertically, wherein this elastic actuator is transparent or translucent elastic actuator.
CN201320336731.4U 2013-06-13 2013-06-13 Backlight device and illuminating keyboard using backlight device Expired - Lifetime CN203377146U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104595804A (en) * 2014-12-12 2015-05-06 青岛歌尔声学科技有限公司 Backlight module and display device
TWI665704B (en) * 2018-07-24 2019-07-11 達方電子股份有限公司 Backlight apparatus used in illuminated keyboard
CN112578859A (en) * 2020-12-24 2021-03-30 深圳市创智成科技股份有限公司 Backlight control method and notebook computer
US11914185B1 (en) 2022-10-05 2024-02-27 Darfon Electronics Corp. Keyswitch having backlight module with three lighting units and two light modifiers
US11977250B2 (en) 2022-03-31 2024-05-07 Darfon Electronics Corp. Lighting keyboard, backlight module and lighting substrate
US12019261B2 (en) 2021-08-25 2024-06-25 Darfon Electronics Corp. Illuminant circuit board, backlight module and lighting keyboard

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104595804A (en) * 2014-12-12 2015-05-06 青岛歌尔声学科技有限公司 Backlight module and display device
TWI665704B (en) * 2018-07-24 2019-07-11 達方電子股份有限公司 Backlight apparatus used in illuminated keyboard
CN112578859A (en) * 2020-12-24 2021-03-30 深圳市创智成科技股份有限公司 Backlight control method and notebook computer
CN112578859B (en) * 2020-12-24 2023-07-14 深圳市创智成科技股份有限公司 Backlight control method and notebook computer
US12019261B2 (en) 2021-08-25 2024-06-25 Darfon Electronics Corp. Illuminant circuit board, backlight module and lighting keyboard
US11977250B2 (en) 2022-03-31 2024-05-07 Darfon Electronics Corp. Lighting keyboard, backlight module and lighting substrate
US11914185B1 (en) 2022-10-05 2024-02-27 Darfon Electronics Corp. Keyswitch having backlight module with three lighting units and two light modifiers

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Granted publication date: 20140101