CN109148196B - Key device - Google Patents
Key device Download PDFInfo
- Publication number
- CN109148196B CN109148196B CN201810974879.8A CN201810974879A CN109148196B CN 109148196 B CN109148196 B CN 109148196B CN 201810974879 A CN201810974879 A CN 201810974879A CN 109148196 B CN109148196 B CN 109148196B
- Authority
- CN
- China
- Prior art keywords
- light
- guide film
- light guide
- light source
- grooves
- 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.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
- H01H13/02—Details
- H01H13/023—Light-emitting indicators
-
- 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
- H01H13/02—Details
- H01H13/023—Light-emitting indicators
- H01H2013/026—Light-emitting indicators with two or more independent lighting elements located inside the push button switch that illuminate separate zones of push buttons
Landscapes
- Push-Button Switches (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a key device, comprising: the LED lamp comprises a light guide film, a circuit board, a light source and a plurality of metal domes, wherein the circuit board and the light source are respectively positioned on two adjacent sides of the light guide film, and the metal domes are arranged on one side of the circuit board opposite to the light guide film; a plurality of shading pieces and a plurality of grooves for reflecting light are arranged on the light guide film at positions corresponding to the metal domes; from the center of the light guide film to the light source direction, the number of the plurality of grooves corresponding to each metal dome gradually decreases, and the number of the plurality of shading parts corresponding to each metal dome gradually increases. Because the brightness of the light guide film is increased by reflecting light rays through the grooves, and the brightness of the light guide film is reduced by the shading pieces, the brightness of the light guide film can be adjusted by changing the number of the grooves and the number of the shading pieces, so that the scheme is favorable for making the brightness of the light guide film uniform.
Description
Technical Field
The invention relates to the field of key devices, in particular to a key device.
Background
At present, intelligent mobile communication equipment is more and more common, the frequency of people is more and more, and the equipment variety that people used is also very much. Some mobile devices have devices for protecting a full keyboard, but for a full-keyboard mobile communication device, the requirement on the uniformity of light guiding of each key in the full keyboard is very high. There are not many keys on the traditional mobile communication equipment, and the requirement for the light guiding uniformity of the keys is not high. But for mobile communication devices that support full keyboard keys, uniformity of each key would be very important. The mobile communication equipment with good light guide uniformity can bring good user experience and also can relieve visual fatigue of a user when the user watches a keyboard for a long time. This requires a high light guiding uniformity for the keys during design and production.
In the prior art, when the traditional wireless communication equipment with full keyboard keys is used for adjusting the light guide uniformity of the keys, the uniformity and the brightness uniformity of the keys at different area positions are difficult to realize. The key lamp is usually realized by adding a light source, but the mode of adding the light source brings limitations of key design structures and improvement of power consumption of the key lamp, and a very uniform effect is not realized.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
The present invention provides a key device to solve the above-mentioned problems in the prior art, and aims to solve the problem that the key device in the prior art cannot achieve uniform brightness.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a key device, comprising: the LED lamp comprises a light guide film, a circuit board, a light source and a plurality of metal domes, wherein the circuit board and the light source are respectively positioned on two adjacent sides of the light guide film, and the metal domes are arranged on one side of the circuit board opposite to the light guide film; a plurality of shading parts and a plurality of grooves for reflecting light are arranged on the light guide film at positions corresponding to the metal domes, the grooves are positioned on one side of the light guide film opposite to the metal domes, and the shading parts are positioned on one side of the light guide film away from the metal domes; from the center of the light guide film to the light source direction, the number of the plurality of grooves corresponding to each metal dome gradually decreases, and the number of the plurality of shading parts corresponding to each metal dome gradually increases.
In the key device, the total number of the plurality of grooves corresponding to each metal collar is equal to the total number of the plurality of light-shielding pieces.
In the key device, the shading part is printed by shading ink.
In the key device, the groove is a spherical groove.
In the key device, the cross section of the light shielding part is circular.
The key device is characterized in that the diameter of the shading piece is smaller than that of the spherical groove.
In the key device, the metal shackles are arranged by a full keyboard.
In the key device, the plurality of grooves corresponding to the metal shackles are uniformly distributed.
In the key device, the shapes and sizes of the grooves corresponding to the metal shackles are consistent.
The key device, wherein the light source includes: the first light source and the second light source are respectively positioned on two opposite sides of the light guide film, and the third light source is positioned on the same side as the second light source; the first light source is located at the center line of the light guide film, and the second light source and the third light source are respectively located on two sides of the center line of the light guide film.
Has the advantages that: because the brightness of the light guide film is increased by reflecting light rays through the grooves, and the brightness of the light guide film is reduced by the shading pieces, the brightness of the light guide film can be adjusted by changing the number of the grooves and the number of the shading pieces, so that the scheme is favorable for making the brightness of the light guide film uniform.
Drawings
Fig. 1 is a schematic structural diagram of a key device according to the present invention.
FIG. 2 is a schematic view of a first structure of a light guiding film according to the present invention.
FIG. 3 is a second structural diagram of a light guiding film according to the present invention.
Fig. 4 is an enlarged view at a in fig. 3.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 4, the present invention provides a key device, including: the device comprises a light guide film 1, a circuit board 6, a light source 4 and a plurality of metal domes 5; the circuit board 6 and the light source 4 are respectively positioned at two adjacent sides of the light guide film 1, and the plurality of metal domes 5 are arranged at one side of the circuit board 6 opposite to the light guide film 1; a plurality of light-shielding pieces 12 and a plurality of grooves 11 for reflecting light are arranged on the light guide film 1 at positions corresponding to the metal domes 5, the plurality of grooves 11 are positioned on one side of the light guide film 1 opposite to the metal domes 5, and the plurality of light-shielding pieces 12 are positioned on one side of the light guide film 1 away from the metal domes 5; from the center of the light guide film 1 to the direction of the light source 4, the number of the plurality of grooves 11 corresponding to each metal collar 5 gradually decreases, and the number of the plurality of light-shielding members 12 corresponding to each metal collar 5 gradually increases.
It should be noted that, because the position on the light guiding film 1 close to the light source 4 has higher brightness, and the position far away from the light source 4 (i.e. the center of the light guiding film 1) has lower brightness, in the present invention, the groove 11 is disposed on the back surface of the light guiding film 1 (i.e. the side of the light guiding film 1 opposite to the metal dome 5), light is incident into the groove 11 from the light incident side of the light guiding film 1, and the groove 11 reflects the light to the front surface of the light guiding film 1 (i.e. the side of the light guiding film 1 away from the metal dome 5), so as to increase the brightness of the light guiding film 1. In contrast, the light shielding member 12 on the front surface of the light guide film 1 is used to shield light, and the brightness of the light guide film 1 can be reduced. The brightness of the corresponding position (namely, the key area, which is provided with the groove and the light-shielding piece but not provided with the groove and the light-shielding piece) of the metal dome 5 on the light guide film 1 is adjusted by changing the number of the groove 11 and the light-shielding piece 12, so that the brightness of different key areas on the light guide film 1 is consistent. The larger the coverage area of the metal dome 5 corresponding to the plurality of grooves 11 is, the more light rays are emitted from the grooves 11 to the front surface of the light guide film 1, and vice versa. The coverage area of the plurality of grooves 11 can be adjusted by changing the opening area of a single groove 11, or changing the number of the plurality of grooves 11, or simultaneously changing the opening area of a single groove 11 and the number of the plurality of grooves 11.
Preferably, in a direction from the center of the light guiding film 1 to the light source 4, the number of the plurality of grooves 11 corresponding to each metal dome 5 gradually decreases, and the number of the plurality of light shielding members 12 corresponding to each metal dome 5 gradually increases. That is, the number of the light shielding members 12 corresponding to each metal dome 5 gradually decreases from the direction close to the light incident side of the light guiding film 1 to the direction far from the light incident side of the light guiding film 1. Specifically, as shown in fig. 4, in order to adapt to the change of brightness caused by distance, the number of the light shielding members 12 close to the light incident side of the light guiding film 1 in a single key region on the light guiding film 1 is greater than the number of the light shielding members 12 far from the light incident side of the light guiding film 1, so that the brightness of the light guiding film 1 is more uniform.
According to the light guide film provided by the invention, because the brightness is increased by reflecting light rays through the grooves 11 and is reduced by the shading pieces 12, the brightness of the light guide film 1 is adjusted by changing the number of the grooves 11 and the number of the shading pieces 12, and the scheme is favorable for enabling the brightness of the light guide film 1 to be uniform.
More specifically, referring to fig. 1 to fig. 3, the key device of the present invention further includes: a key cover 2, a pressing piece 3 and a steel sheet 7; the key cover 2, the pressing piece 3, the light guide film 1, the metal dome 5, the circuit board 6 and the steel sheet 7 are sequentially arranged, specifically, three light sources are provided, namely a first light source, a second light source and a third light source, the first light source and the second light source are respectively positioned on two opposite sides of the light guide film 1, and the third light source is positioned on the same side as the second light source; the first light source is located at the center line of the light guide film 1, and the second light source and the third light source are respectively located on two sides of the center line of the light guide film 1.
In an embodiment of the present invention, the number of the plurality of grooves 11 corresponding to each of the metal domes 5 is equal to the total number of the plurality of light-shielding members 12.
Specifically, the number of the plurality of grooves 11 and the number of the plurality of light-shielding members 12 may be set as required, and of course, the total number of the plurality of grooves 11 and the plurality of light-shielding members 12 corresponding to each metal snap 5 may also be equal.
In one embodiment of the present invention, the light-shielding member 12 is printed using a light-shielding ink.
Specifically, the light shielding member 12 is formed by printing light shielding ink, the light shielding ink is printed in the front key area of the light guide film 1 in the process of preparing the light shielding member 12, and then the light shielding member is baked at low temperature, so that the light shielding member 12 has good wear resistance, and the light shielding member 12 cannot fall off in the long-time use process.
In a preferred embodiment of the present invention, as shown in fig. 1-2, the groove 11 is a spherical groove 11. The shapes and the sizes of the plurality of grooves 11 corresponding to the metal snap rings 5 are consistent. The plurality of grooves 11 corresponding to the metal shackles are uniformly distributed.
Specifically, the groove 11 may be a spherical groove 11, and may also be a groove of other shapes, such as a triangular prism-shaped groove, a cylindrical groove, and the like. The size of each groove 11 in a single key area on the light guide film 1 is consistent, and the size of each groove 11 in each key area on the light guide film 1 is different. The covering area of the groove 11 close to the light incident side of the light guide film 1 is less than that of the groove 11 far away from the light incident side of the light guide film 1, and here the covering area of the groove 11 can be represented by the size of the opening area of the single groove 11 and the number of the grooves 11. As shown in fig. 3, the opening area of the groove 11 close to the light incident side of the light guide film 1 is smaller or the number of the grooves is smaller, the opening area of the groove 11 far away from the light incident side of the light guide film 1 is larger, and the number of the grooves 11 is larger. In order to make the intensity of light in a single key area on the light guide film 1 consistent, the shapes and sizes of the plurality of grooves 11 corresponding to the metal domes are consistent, and the plurality of grooves 11 corresponding to the metal domes are uniformly distributed, that is, the grooves 11 are uniformly distributed in the single key area on the light guide film 1.
In a preferred embodiment of the present invention, the shade 12 is circular in cross-section, as shown in fig. 2-4. The diameter of the light-shielding member 12 is smaller than that of the spherical recess.
Specifically, the light-shielding member 12 may be a circular light-shielding member, but may also be a light-shielding member with other shapes, such as a triangle, a quadrangle, an ellipse, and the like. The light shielding member 12 absorbs the light irradiated on the light shielding member 12, and the light shielding member 12 may also be a light reflecting member, which reflects the light irradiated on the light reflecting member into the light guiding film 1 to continue using the light. All the light-shielding members 12 have the same shape and size, but the distance between every two light-shielding members 12 is different when the light-shielding members are arranged. Different from the groove 11, the size of the light shielding member 12 is fixed, so that the adoption of the smaller light shielding member 12 is beneficial to avoiding black spots on the front surface of the light guide film 1 caused by adding the light shielding member 12.
In a preferred embodiment of the present invention, as shown in fig. 2-3, a plurality of said metal domes 5 are in a full keyboard arrangement.
Specifically, the light guide film 1 of the present invention may be used for a 9-grid keyboard, and may also be used for a full keyboard. Generally, the size of the full keyboard is large, and the brightness of the light guide film 1 is not uniform enough by increasing the number of light sources, but the brightness of the light guide film 1 can be uniform by using the grooves 11 and the light shielding members 12 of the present invention.
In summary, the present invention provides a key device, including: the LED lamp comprises a light guide film, a circuit board, a light source and a plurality of metal domes, wherein the circuit board and the light source are respectively positioned on two adjacent sides of the light guide film, and the metal domes are arranged on one side of the circuit board opposite to the light guide film; a plurality of shading parts and a plurality of grooves for reflecting light are arranged on the light guide film at positions corresponding to the metal domes, the grooves are positioned on one side of the light guide film opposite to the metal domes, and the shading parts are positioned on one side of the light guide film away from the metal domes; from the center of the light guide film to the light source direction, the number of the plurality of grooves corresponding to each metal dome gradually decreases, and the number of the plurality of shading parts corresponding to each metal dome gradually increases. Because the brightness of the light guide film is increased by reflecting light rays through the grooves, and the brightness of the light guide film is reduced by the shading pieces, the brightness of the light guide film can be adjusted by changing the number of the grooves and the number of the shading pieces, so that the scheme is favorable for making the brightness of the light guide film uniform.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (3)
1. A key device, comprising: the LED lamp comprises a light guide film, a circuit board, a light source and a plurality of metal domes, wherein the circuit board and the light source are respectively positioned on two adjacent sides of the light guide film, and the metal domes are arranged on one side of the circuit board opposite to the light guide film; a plurality of shading parts and a plurality of grooves for reflecting light are arranged on the light guide film at positions corresponding to the metal domes, the grooves are positioned on one side of the light guide film opposite to the metal domes, and the shading parts are positioned on one side of the light guide film away from the metal domes; from the center of the light guide film to the light source direction, the number of the plurality of grooves corresponding to each metal dome gradually decreases, and the number of the plurality of shading pieces corresponding to each metal dome gradually increases; the corresponding position of the metal dome on the light guide film is a key area, the key area is provided with the groove and the shading piece, and the quantity of the shading pieces close to the light incident side of the light guide film in a single key area on the light guide film is more than that of the shading pieces far away from the light incident side of the light guide film; the sizes of the grooves in a single key area on the light guide film are consistent, and the sizes of the grooves in the key areas on the light guide film are different; the cross section of the shading part is circular; the groove is a spherical groove, and the diameter of the shading part is smaller than that of the spherical groove; all the light shading pieces are the same in shape and size; the plurality of grooves corresponding to the metal boiler are uniformly distributed; the total number of the plurality of grooves corresponding to the metal shackles is equal to the total number of the plurality of light shading pieces; the shading piece is printed by shading ink; the opening area of the groove close to the light incident side of the light guide film is smaller, and the opening area of the groove far away from the light incident side of the light guide film is larger.
2. The key device of claim 1, wherein a plurality of said metal domes are arranged in a full keyboard arrangement.
3. The key device according to claim 1, wherein the light source comprises: the first light source and the second light source are respectively positioned on two opposite sides of the light guide film, and the third light source is positioned on the same side as the second light source; the first light source is located at the center line of the light guide film, and the second light source and the third light source are respectively located on two sides of the center line of the light guide film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810974879.8A CN109148196B (en) | 2018-08-24 | 2018-08-24 | Key device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810974879.8A CN109148196B (en) | 2018-08-24 | 2018-08-24 | Key device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109148196A CN109148196A (en) | 2019-01-04 |
| CN109148196B true CN109148196B (en) | 2021-01-08 |
Family
ID=64827955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810974879.8A Active CN109148196B (en) | 2018-08-24 | 2018-08-24 | Key device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109148196B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110010397A (en) * | 2019-05-15 | 2019-07-12 | 光宝电子(广州)有限公司 | Luminous button |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002343122A (en) * | 2001-05-18 | 2002-11-29 | Kyocera Corp | Illumination panel, liquid crystal display equipment, and portable terminal or display |
| CN203179768U (en) * | 2013-02-05 | 2013-09-04 | 株式会社Magma | Keyboard lighting device |
| CN203453993U (en) * | 2013-06-20 | 2014-02-26 | 苏州创佳电子材料有限公司 | Light guiding sheet assembly for keyboard and keyboard |
| US8890014B1 (en) * | 2013-07-19 | 2014-11-18 | Primax Electronics Ltd. | Luminous keyboard and light guide plate module thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102800517A (en) * | 2011-05-24 | 2012-11-28 | 致伸科技股份有限公司 | Luminous keyboard |
| CN102866451A (en) * | 2011-07-08 | 2013-01-09 | 毅嘉科技股份有限公司 | Light guide plate structure and manufacturing method thereof |
| CN102879850A (en) * | 2011-07-11 | 2013-01-16 | 毅嘉科技股份有限公司 | Light guide plate structure |
| CN202217608U (en) * | 2011-08-24 | 2012-05-09 | 精元电脑(江苏)有限公司 | Light guide structure for touch control keyboard |
| CN202305871U (en) * | 2011-09-28 | 2012-07-04 | 深圳市同心键科技有限公司 | Keyboard light guiding film and keyboard using same |
| CN202434396U (en) * | 2012-02-10 | 2012-09-12 | 精元电脑股份有限公司 | Light guide diaphragm structure of illuminant keyboard |
-
2018
- 2018-08-24 CN CN201810974879.8A patent/CN109148196B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002343122A (en) * | 2001-05-18 | 2002-11-29 | Kyocera Corp | Illumination panel, liquid crystal display equipment, and portable terminal or display |
| CN203179768U (en) * | 2013-02-05 | 2013-09-04 | 株式会社Magma | Keyboard lighting device |
| CN203453993U (en) * | 2013-06-20 | 2014-02-26 | 苏州创佳电子材料有限公司 | Light guiding sheet assembly for keyboard and keyboard |
| US8890014B1 (en) * | 2013-07-19 | 2014-11-18 | Primax Electronics Ltd. | Luminous keyboard and light guide plate module thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109148196A (en) | 2019-01-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3320581B1 (en) | Lighting device with wireless control element | |
| US8360595B2 (en) | Light-guiding structure of translucent press key | |
| CN109148196B (en) | Key device | |
| CN109578939A (en) | light source guiding device | |
| EP2629171B1 (en) | Keypad lighting device for portable terminal | |
| CN106773286B (en) | Backlight unit for local light control and display device | |
| KR20140132571A (en) | Backlight unit | |
| CN103123084A (en) | Solar backlight source and light-emitting banner | |
| CN113820907B (en) | Light guide and electronic device | |
| KR101402555B1 (en) | Straight type led module | |
| TWI635340B (en) | Back light module capable of distribute uniform light and luminous keyboard | |
| CN210319850U (en) | LED tri-proof light | |
| CN207557620U (en) | Side entrance back module, LCD TV, intelligent terminal | |
| CN110708411B (en) | Method for realizing regional display of light-emitting mobile phone shell | |
| CN107781785B (en) | Flash lamp lampshade, mobile terminal device and shell thereof | |
| CN114078646A (en) | Luminous key structure | |
| CN216384030U (en) | Desk lamp light guide plate of lamp shadow disappears | |
| CN206741065U (en) | Lens and display device | |
| CN219496881U (en) | Light guide structure of light guide column of projector | |
| CN206178182U (en) | Energy -efficient light diffuser plate | |
| CN220119222U (en) | Lighting lamp | |
| CN216411624U (en) | Light guide plate, backlight module and display device | |
| CN103899961A (en) | LED panel lamp | |
| CN210051917U (en) | Gradual change type ink layer structure for eliminating light spots | |
| CN210485600U (en) | Device of anti-dazzle integral lens for LED illuminating lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |