CN101882520B - Button device for improving luminous efficiency - Google Patents
Button device for improving luminous efficiency Download PDFInfo
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- CN101882520B CN101882520B CN 200910050843 CN200910050843A CN101882520B CN 101882520 B CN101882520 B CN 101882520B CN 200910050843 CN200910050843 CN 200910050843 CN 200910050843 A CN200910050843 A CN 200910050843A CN 101882520 B CN101882520 B CN 101882520B
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- light guide
- guide plate
- light
- junction point
- conductive junction
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Abstract
The invention relates to a button device for improving the luminous efficiency, which comprises a light guide board, an isolating film, a circuit board, an elastic body and a button part arranged from bottom to top sequentially, wherein a circuit and a plurality of first conductive contacts are arranged on the upper surface of the light guide board, an optical structure is arranged on the lower surface, and a light source is arranged at the side of the light guide board; the isolating film is provided with a plurality of through holes corresponding to the first conductive contacts; a plurality of second conductive contacts corresponding to the positions of the through holes and the first conductive contacts are arranged below the circuit board; one side of the isolating film facing the light guide board is provided with a light ray reflecting structure which enables the light rays emitted from the light guide board to be reflected by the isolating film to the light guide board; and the reflection of the optical structure penetrates through the through hole. The invention has the beneficial effect that under the condition that the volume or thickness of a backlight module is not increased, the luminous efficiency is further increased.
Description
Technical field
The present invention relates to a kind of button that possesses luminous visual effect, relate in particular to barrier film structure in this button.
Background technology
Early stage notes type or the keyboard of desktop PC all can't be luminous, but along with the progress of backlight module technology, existing manufacturer arranges light-emitting device at keyboard, allows keyboard itself except possessing illuminating effect, also has simultaneously decoration function concurrently.
" illuminated keyboard " that No. 509955 Patent Case provides announced in the Taiwan, its technical characterictic is to include button section and back lighting device, this button section has a base plate, and the relative mode that moves up and down of base plate and be located at least one button on the base plate, and back lighting device is that button subordinate side is set, can provide from button subordinate side button section light source by this back lighting device, the light of light source projects up passes button and makes button produce illumination effect.This purpose of announcing No. 509955 Patent Case is except the keyboard illumination effect is provided, and also takes into account simultaneously the thickness requirement that dwindles illuminated keyboard.Yet under the increasingly compact needs of the electronic product with button, the button gross thickness that this announces No. 509955 Patent Case provides has failed to reach more harsh requirement.
Existing compact keyboard, its structural design be from bottom to top sequentially arrange the circuit board that comprises a light guide plate, a barrier film, a light-permeable, an elastomer, with the button section of a light-permeable, wherein, be laid with circuit board and plural the first conductive junction point on the light guide plate, the position of corresponding each first conductive junction point then is provided with the second conductive junction point below the circuit board, and barrier film is provided with a plurality of to should the first conductive junction point and the through hole of the second conductive junction point position; After the light source of being located at the light guide plate side entered circuit board with ray cast, the light directly reflection of the optical texture below light guide plate penetrated by this through hole, so that button section produces luminous visual effect.Described known keyboard structure, unless improve brightness or the quantity of light source, otherwise, do not changing under the existing framework of backlight module volume and thickness, fail further improving luminous efficiency.
Summary of the invention
The technical issues that need to address of the present invention have provided a kind of key device that improves luminous efficiency, are intended to solve the above problems.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:
The present invention includes: a light guide plate, a barrier film, a circuit board, an elastomer and the button section of comprising from bottom to top sequentially is set; The upper surface of described light guide plate is laid with circuit and plural the first conductive junction point, and its lower surface has optical texture, and the side of this light guide plate is provided with light source; Described barrier film is provided with a plurality of to through hole that should the first conductive junction point; Be provided with plural number below the described circuit board to should through hole and the second conductive junction point of the first conductive junction point position; Described barrier film has in the face of the one side of this light guide plate so that the light that penetrates from light guide plate is able to be reflected back by this barrier film the structure of the reflection ray of light guide plate, and described optical texture reflects through this through hole.
Compared with prior art, the invention has the beneficial effects as follows: under the condition that does not increase backlight module volume or thickness, further promoted luminous efficiency.
Description of drawings
Fig. 1 is for showing key device of the present invention, the plan cross-section decomposing schematic representation of the assembly syntagmatic that comprises;
Fig. 2 is for showing key device of the present invention, the structure after the assembly that the comprises combination, and the enlarged diagram in light conduction path;
Fig. 3 is for showing key device of the present invention, when being depressed in button section, the first conductive junction point and the second conductive junction point is in contact with one another and the embodiment schematic diagram that is electrically connected.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:
Principal character of the present invention, to utilize to possess the diaphragm of reflection ray character as the barrier film between light guide plate and the circuit board, and the through hole of a plurality of corresponding key positions is set at this barrier film, therefore, after ray cast entered light guide plate, part light got directly and penetrates by this through hole is logical, part light then can reflex to light guide plate by barrier film, the reflection of optical texture below light guide plate arrives button section by this through hole again, and then increases the brightness of button section, improving luminous efficiency.
Based on this, the key device of raising luminous efficiency provided by the invention includes and from bottom to top sequentially stacks mutually a light guide plate, a barrier film, a circuit board, an elastomer and a button section of putting; The upper surface of described light guide plate is laid with circuit and plural the first conductive junction point, and its lower surface has optical texture, and the side of light guide plate is provided with light source; Described barrier film is provided with a plurality of to through hole that should the first conductive junction point position; Described circuit board is provided with plural number to should through hole and the second conductive junction point of the first conductive junction point position; Described barrier film has the character of reflection ray in the face of the one side of this light guide plate, so that the light that penetrates from light guide plate is able to be reflected back light guide plate by this barrier film, reflect through this through hole by described optical texture again, improve thus the light amount by this through hole, allow the brightness of button section improve, reach the purpose that improves luminous efficiency.
The present invention is to adopt the material with good reflection nature of light to make for the technological means of described barrier film, and goes out in advance the through hole of corresponding aforementioned the first conductive junction point and the second conductive junction point in this barrier film punch forming.
The present invention is for aforesaid optical texture, can be chosen in light guide plate below one deck reflection diaphragm is set, also can be directly below light guide plate straight forming go out the thin bump of plural number or thin concave point, all can produce the effect of reflection ray.
Can compare by luminous press-key structure with prior art, key device of the present invention does not increase any extra assembly fully, and do not increase volume or the thickness of whole key device, but the replacement of the barrier film by possessing reflective character, just can reach the purpose that promotes key light emitting brightness and efficient, be the design of tool innovation, progressive in fact.
Consult shown in Figure 1, key device provided by the invention, its preferred embodiment includes from bottom to top a light guide plate 1, a barrier film 2, a circuit board 3, an elastomer 5 and a button section 6 that sequentially arranges; Wherein light guide plate 1 is to adopt the optical material with good leaded light character to make, based on the consideration of dwindling backlight module thickness, be directly to lay circuit and plural the first conductive junction point 12 at the upper surface of light guide plate 1, the lower surface of light guide plate 1 then arranges optical texture 11; This optical texture 11 can be the tiny circular bump of plural number or concave point, polygonal bump or concave point ... etc. so that in light guide plate 1 light of conduction by those optical textures reflections in, light can be done suitable refraction and homogenizing, softization.The position of each button section 6 that those first conductive junction points 12 are corresponding keyboard produces electric connection and the usefulness of transmission control signal when pressing keys section is provided.The side of light guide plate 1 then arranges at least one light source 4, and the ray cast direction of light source 4 is preferably vertical with the side of circuit board 3, and light source 4 can enter ray cast light guide plate 1 interior conduction, and by optical texture 11 light is reflected toward the top; At the embodiment of this creation, described light source 4 is to use LED (light-emitting diode).The circuit that described circuit board 3 is laid be with light guide plate 1 on circuit support the use, with the start of control keying signal, and the second conductive junction point 31 of those the first conductive junction point 12 positions of a plurality of correspondences is set below circuit board 3.
Described barrier film 2 is the assemblies that separate as with light guide plate 1 and circuit board 3, make under the state that is not subjected to External Force Acting, the first conductive junction point 12 and the second conductive junction point 31 do not contact with each other electric connection, otherwise then the first conductive junction point 12 and the second conductive junction point 31 are in contact with one another and are electrically connected and send a control signal that is pressed button; Therefore, barrier film 2 is provided with the through hole 21 of those first conductive junction points 12 of a plurality of correspondences and the second conductive junction point 31 positions, the passage that contacts with each other as the first conductive junction point 12 and the second conductive junction point 31.
In order to make the well past limit of uploading of light, described circuit board 3 is at embodiments of the invention, be to adopt to have the material (for example transparent plastic) that leaded light character is arranged and make, and described elastomer 5 be set, the described button of the top recombinant section 6 of elastomer 5 on circuit board 3; Button section 6 also adopt can printing opacity the material manufacturing, or literal or the symbol only be located in the button section can printing opacities.
Fig. 2 shows the enlarged drawing of the rear structure of key device primary clustering combination of the present invention, and when not being pressed in button section 6, the first conductive junction point 12 and the second conductive junction point 31 are subject to separating of barrier film 2 and are not in contact with one another; When pressing keys section 6, elastomer 4 is down pressed simultaneously, and then with circuit board 3 past pressing down and so that the second conductive junction point 31 contacts (referring to Fig. 3) with the first conductive junction point 12, thereby touching circuit produces a control signal; When decontroling button section 6, then by the elastic restoring force of elastomer 5 with button section 6 homings, then the first conductive part 12 separates with the second conductive part 31.When light source 4 is luminous, light namely throws and enters light guide plate 1 interior conduction, part light directly passes through the through hole 21 of barrier film 2 and the circuit board 3 of light-permeable by optical texture 11 reflections, passing button section 6 exhales again, another part light then is reflected back light guide plate 1 below barrier film 2,11 reflections of optical texture below light guide plate are passed button section 6 again and are exhaled by the through hole 21 of barrier film 2 and the circuit board 3 of light-permeable again, make button section 6 have luminous visual effect.
The above only is in order to explain the present invention's preferred embodiment; be not that attempt is done any pro forma restriction to the present invention according to this; so all have in lower relevant any modification or the change done of identical spirit, all must be included in the category that the invention is intended to protect.
Claims (4)
1. a key device that improves luminous efficiency comprises: a light guide plate, a barrier film, a circuit board, an elastomer and the button section of comprising from bottom to top sequentially is set; The upper surface of described light guide plate is laid with circuit and plural the first conductive junction point, and its lower surface has optical texture, and the side of this light guide plate is provided with light source; Described barrier film is provided with a plurality of to through hole that should the first conductive junction point; Be provided with plural number below the described circuit board to should through hole and the second conductive junction point of the first conductive junction point position; It is characterized in that: described barrier film has in the face of the one side of this light guide plate so that the light that penetrates from light guide plate is able to be reflected back by this barrier film the structure of the reflection ray of light guide plate, and described optical texture reflects through this through hole.
2. the press-key structure of raising luminous efficiency according to claim 1, it is characterized in that: described optical texture is a kind of reflection diaphragm.
3. the press-key structure of raising luminous efficiency according to claim 1 is characterized in that: described optical texture is the tiny bump of plural number.
4. the press-key structure of raising luminous efficiency according to claim 1 is characterized in that: described optical texture is the tiny concave point of plural number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910050843 CN101882520B (en) | 2009-05-08 | 2009-05-08 | Button device for improving luminous efficiency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910050843 CN101882520B (en) | 2009-05-08 | 2009-05-08 | Button device for improving luminous efficiency |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101882520A CN101882520A (en) | 2010-11-10 |
| CN101882520B true CN101882520B (en) | 2013-03-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910050843 Active CN101882520B (en) | 2009-05-08 | 2009-05-08 | Button device for improving luminous efficiency |
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| Country | Link |
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| CN (1) | CN101882520B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI661451B (en) * | 2017-02-16 | 2019-06-01 | 群邁通訊股份有限公司 | Key structure and electronic device with the key structure |
| CN208690145U (en) * | 2018-03-09 | 2019-04-02 | 深圳新纳光电科技有限公司 | The keycap of keyboard |
Citations (11)
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|---|---|---|---|---|
| CN1453600A (en) * | 2002-04-24 | 2003-11-05 | 达方电子股份有限公司 | Light-emitting member, its manufacture and light-emitting keyboard with the member |
| CN1507586A (en) * | 2001-03-28 | 2004-06-23 | 巴巴拉・塞克斯通 | Computer |
| CN1532674A (en) * | 2003-03-20 | 2004-09-29 | 达方电子股份有限公司 | Keyboard structure |
| WO2008072666A1 (en) * | 2006-12-12 | 2008-06-19 | Alps Electric Co., Ltd. | Illuminated input device |
| CN201084588Y (en) * | 2007-07-25 | 2008-07-09 | 天瑞企业股份有限公司 | A keyboard side light structure |
| CN101236850A (en) * | 2007-01-30 | 2008-08-06 | 毅嘉科技股份有限公司 | Film keyboard making method and its structure |
| JP2008181791A (en) * | 2007-01-25 | 2008-08-07 | Alps Electric Co Ltd | Movable contact unit for switch, and switch device using the same |
| JP3147749U (en) * | 2008-10-31 | 2009-01-15 | 興隆發電子股▲分▼有限公司 | Reinforced light-guided light-emitting keyboard |
| CN201191571Y (en) * | 2008-04-11 | 2009-02-04 | 嘉兴淳祥电子科技有限公司 | Light conducting board for mobile phone press-key |
| CN101398510A (en) * | 2008-10-24 | 2009-04-01 | 苏州达方电子有限公司 | Input device and light conducting plate thereof |
| CN201402760Y (en) * | 2009-05-08 | 2010-02-10 | 上海向隆电子科技有限公司 | Keying device for improving light efficiency |
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2009
- 2009-05-08 CN CN 200910050843 patent/CN101882520B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1507586A (en) * | 2001-03-28 | 2004-06-23 | 巴巴拉・塞克斯通 | Computer |
| CN1453600A (en) * | 2002-04-24 | 2003-11-05 | 达方电子股份有限公司 | Light-emitting member, its manufacture and light-emitting keyboard with the member |
| CN1532674A (en) * | 2003-03-20 | 2004-09-29 | 达方电子股份有限公司 | Keyboard structure |
| WO2008072666A1 (en) * | 2006-12-12 | 2008-06-19 | Alps Electric Co., Ltd. | Illuminated input device |
| JP2008181791A (en) * | 2007-01-25 | 2008-08-07 | Alps Electric Co Ltd | Movable contact unit for switch, and switch device using the same |
| CN101236850A (en) * | 2007-01-30 | 2008-08-06 | 毅嘉科技股份有限公司 | Film keyboard making method and its structure |
| CN201084588Y (en) * | 2007-07-25 | 2008-07-09 | 天瑞企业股份有限公司 | A keyboard side light structure |
| CN201191571Y (en) * | 2008-04-11 | 2009-02-04 | 嘉兴淳祥电子科技有限公司 | Light conducting board for mobile phone press-key |
| CN101398510A (en) * | 2008-10-24 | 2009-04-01 | 苏州达方电子有限公司 | Input device and light conducting plate thereof |
| JP3147749U (en) * | 2008-10-31 | 2009-01-15 | 興隆發電子股▲分▼有限公司 | Reinforced light-guided light-emitting keyboard |
| CN201402760Y (en) * | 2009-05-08 | 2010-02-10 | 上海向隆电子科技有限公司 | Keying device for improving light efficiency |
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| Publication number | Publication date |
|---|---|
| CN101882520A (en) | 2010-11-10 |
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