CN109872907B - illuminated keyboard - Google Patents
illuminated keyboard Download PDFInfo
- Publication number
- CN109872907B CN109872907B CN201711269452.XA CN201711269452A CN109872907B CN 109872907 B CN109872907 B CN 109872907B CN 201711269452 A CN201711269452 A CN 201711269452A CN 109872907 B CN109872907 B CN 109872907B
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- Prior art keywords
- light
- guide plate
- light guide
- circuit board
- key
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- Input From Keyboards Or The Like (AREA)
- Push-Button Switches (AREA)
Abstract
本发明提供一种发光键盘，其包括按键模块、导光板、可产生光束的直下式发光元件以及遮光元件。导光板位于按键模块的下方，直下式发光元件设置于导光板的下方且直下式发光元件的出光面与导光板接触。遮光元件设置于导光板上，其可遮蔽光束，而遮光元件部分伸入导光板的导光板开孔，使部分遮光元件于导光板开孔内形成反射部。其中，当光束被投射至反射部时，被反射的光束于导光板内行进且可投射至按键模块。本发明发光键盘可提供较佳的发光效率。
The invention provides a light-emitting keyboard, which includes a key module, a light guide plate, a direct-type light-emitting element capable of generating light beams, and a light-shielding element. The light guide plate is located below the key module, the direct type light emitting element is arranged below the light guide plate, and the light emitting surface of the direct type light emitting element is in contact with the light guide plate. The light-shielding element is arranged on the light guide plate, which can shield the light beam, and the light-shielding element partially extends into the light-guiding plate opening of the light-guiding plate, so that part of the light-shielding element forms a reflection part in the light-guiding plate opening. Wherein, when the light beam is projected to the reflection part, the reflected light beam travels in the light guide plate and can be projected to the key module. The luminous keyboard of the present invention can provide better luminous efficiency.
Description
Technical Field
The present invention relates to a keyboard, and more particularly, to a light-emitting keyboard capable of generating a light-emitting effect.
Background
Common peripheral input devices for computers include mice, keyboards, trackballs, etc., wherein the keyboard can directly input characters and symbols to the computer, and therefore, the users and manufacturers of the input devices pay attention to the input devices.
Please refer to fig. 1, which is a schematic diagram of an appearance structure of a conventional keyboard. The conventional keyboard 1 has a plurality of keys 10 exposed on a surface thereof, the plurality of keys 10 are classified into a general key 101, a numeric key 102, a function key 103, etc., the plurality of keys are pressed by a user's finger to generate a corresponding signal to the computer, so that the computer executes the pressed key functions, for example, the general key 101 is used for inputting symbols such as english letters, the numeric key 102 is used for inputting numbers, and the function key 103 is used for providing various functions, for example, F1-F12, etc. The conventional keyboard 1 is a keyboard for a notebook computer.
With the development of technology, keyboard manufacturers are dedicated to develop various keyboards with special functions to meet various requirements of different users, such as light-emitting keyboards. The internal structure of the conventional light-emitting keyboard is explained below. Please refer to fig. 2, which is a schematic cross-sectional view of a conventional light-emitting keyboard. The conventional light-emitting keyboard 2 includes a plurality of keys 20, a membrane switch circuit 21, a light guide plate 22, a light-emitting module 23, a support plate 24, and a reflective sheet 25. The key 20 includes a key cap 201, a scissors-type connecting element 202 and an elastic element 203. In the conventional light-emitting keyboard 2, the key cap 201, the scissors-type connecting element 202, the elastic element 203, the membrane switch circuit 21, the supporting plate 24, the light guide plate 22 and the reflective sheet 25 are arranged in sequence from top to bottom, and the supporting plate 24 located between the membrane switch circuit 21 and the light guide plate 22 can bear the key cap 201, the scissors-type connecting element 202, the elastic element 203 and the membrane switch circuit 21 thereon.
In the key 20, the key cap 201 is exposed outside the existing keyboard 2 and can be pressed by a user, the scissors-type connecting element 202 is used to connect the key cap 201 and the supporting plate 24, and the elastic element 203 passes through the scissors-type connecting element 202 and contacts with the key cap 201 and the membrane switch circuit 21 respectively. The membrane switch circuit 21 includes an upper wiring board 211, an isolation layer 212, and a lower wiring board 213, the upper wiring board 211 having a plurality of upper conductive portions 2111, the isolation layer 212 being located below the upper wiring board 211 and having a plurality of isolation layer openings 2121 corresponding to the plurality of upper conductive portions 2111, and the lower wiring board 213 being located below the isolation layer 212 and having a plurality of lower conductive portions 2131 corresponding to the plurality of upper conductive portions 2111, such that the plurality of lower conductive portions 2131 and the plurality of upper conductive portions 2111 form a plurality of key switches 214. The upper circuit board 211, the isolation layer 212 and the lower circuit board 213 are made of a transparent material, and the transparent material is made of Polycarbonate (PC) material or Polyethylene (PE) material, so as to have a transparent effect.
The light emitting module 23 includes a power supply circuit board 231 and a plurality of lateral light emitting devices 232 (only two are shown in the figure), the power supply circuit board 231 is located below the membrane switch circuit 21 for providing power to the plurality of lateral light emitting devices 232, and the plurality of lateral light emitting devices 232 are disposed on the power supply circuit board 231 and extend into the plurality of reflector openings 251 of the reflector 25 and the plurality of light guide plate openings 221 of the light guide plate 22, when the plurality of lateral light emitting devices 232 obtain power, a plurality of light beams B are generated, and the plurality of light beams B are projected to the light guide plate 22. And the light guide plate 22 functions to guide the plurality of light beams B to be projected to the key cap 201. The reflective sheet 25 is disposed below the light guide plate 22, and reflects the light beams B to project the light beams B upward, thereby preventing the light beams B from being wasted.
In the conventional light-emitting keyboard 2, each key cap 201 has a light-emitting area 2011, and the light-emitting area 2011 is a position where a letter or a symbol is located, wherein the light-emitting area 2011 corresponds to a position where a light-guiding dot 223 on the light-guiding plate 22 is located, so that a light beam is guided upwards through the light-guiding dot 223 to the light-emitting area 2011, when the light beam B guided in the light-guiding plate 22 is projected onto the light-guiding dot 223, the light-guiding dot 223 can guide the light beam B to project upwards, and the upwards projected light beam B can sequentially pass through a supporting plate opening 241 of the supporting plate 24 and the thin film switch circuit 21, and further pass through the light-emitting area 2011 of the key cap 201, so that the letter or the symbol on the key cap 201 can be transmitted and have a light-emitting effect.
The thickness of the side light-emitting element 232 is greater than that of the light guide plate 22, so that a part of the light beam B generated by the side light-emitting element 232 is not projected into the light guide plate 22, which causes light waste, i.e., the light-emitting efficiency of the conventional light-emitting keyboard 2 is affected.
Therefore, a light-emitting keyboard with improved light-emitting efficiency is needed.
Disclosure of Invention
The invention aims to provide a luminous keyboard capable of improving luminous efficiency.
In a preferred embodiment, the present invention provides a light-emitting keyboard, which includes a key module, a light guide plate, a direct-type light-emitting device and a light-shielding device. The key module is partially exposed outside the light-emitting keyboard, the light guide plate is positioned below the key module, and the light guide plate is provided with a light guide plate opening. The direct type light emitting element is arranged below the light guide plate, and a light emergent surface of the direct type light emitting element is in contact with the light guide plate to generate a light beam which is projected into the light guide plate. The shading element is arranged on the light guide plate and used for shading the light beam, and the part of the shading element extends into the hole of the light guide plate, so that part of the shading element forms a reflecting part in the hole of the light guide plate. When the light beam is projected to the reflection part, the light beam is reflected to travel in the light guide plate, one part of the light beam passes through an opening of the shading element and is projected to the key module, and the other part of the light beam leaves the light guide plate.
In short, the present invention has the advantages that the light emitting keyboard adopts the direct type light emitting device as the light emitting source, and the light emitting surface of the direct type light emitting device is larger than the light emitting surface of the existing side type light emitting device, so the direct type light emitting device can provide a light beam with higher power. In addition, the light-emitting surface of the direct-type light-emitting element is designed to be in contact with the lower surface of the light guide plate, that is, no gap exists between the direct-type light-emitting element and the light guide plate, so that most of light beams can be projected into the light guide plate, and the phenomenon of light waste is reduced. Finally, the light-shielding element is extended into the hole of the light guide plate to form a reflecting part to reflect the light beam, so that the light beam can travel in the light guide plate to generate a light traveling path similar to the existing lateral light-emitting element, and the light-emitting keyboard can emit light. According to the above, the light-emitting keyboard of the invention can provide better light-emitting efficiency.
Drawings
Fig. 1 is a schematic view of an appearance structure of a conventional keyboard.
Fig. 2 is a schematic sectional view of a conventional light-emitting keyboard.
Fig. 3 is a partially exploded view of the light-emitting keyboard according to a preferred embodiment of the invention.
Fig. 4 is an exploded view of the switch circuit board of the light-emitting keyboard according to a preferred embodiment of the present invention.
FIG. 5 is a side view of a portion of a light-emitting keyboard according to a preferred embodiment of the invention.
The reference numbers are as follows:
1 keyboard
2. 3 luminous keyboard
10. 20, 311 push-button
21 thin film switch circuit
22. 33 light guide plate
23 light emitting module
24. 312 supporting plate
25 reflective sheet
31 push-button module
32 shading element
34 direct type light emitting element
35. 231 power supply circuit board
36 reflective element
101 general key
102 general key
103 function keys
202 scissor type connecting element
201. 314 button cap
203 elastic element
211. 3131 Upper wiring board
212. 3133 an isolating layer
213. 3132 lower circuit board
214 push-button switch
232 side direction type light emitting element
313 switch circuit board
315 connecting element
316 trigger element
321 reflection part
322 convex part
323 opening holes
331 light guide plate opening
341 light-emitting surface
361 reflective sheet opening
2011 light emergent area
2111. 3131A Upper conductive part
2121. 3133A isolation layer opening
2131. 3132A lower conducting part
3121 supporting plate opening
3122 hook for fastening
B light beam
Detailed Description
In view of the problems of the prior art, the present invention provides a light-emitting keyboard that can solve the problems of the prior art. First, a structure of the light-emitting keyboard of the present invention is described, please refer to fig. 3, which is a partially exploded view of the light-emitting keyboard in a preferred embodiment of the present invention. The light-emitting keyboard 3 of the present invention includes a key module 31, a light-shielding element 32, a light guide plate 33, a plurality of direct-type light-emitting elements 34, a power supply circuit board 35 and a reflective element 36, wherein the key module 31 includes a plurality of keys 311 (only one is shown), a supporting board 312 and a switch circuit board 313. The light guide plate 33 is disposed below the key module 31, and the light guide plate 33 has a plurality of light guide plate openings 331 corresponding to the plurality of direct-type light emitting elements 34. The direct light emitting device 34 is disposed below the light guide plate 33, and the light exit surface 341 of the direct light emitting device 34 contacts with the lower surface of the light guide plate 33, so as to generate the light beam B and project the light beam B into the light guide plate 33 as much as possible. The power circuit board 35 is located below the light guide plate 33, and can carry a plurality of direct-type light emitting elements 34 thereon and electrically connect to the plurality of direct-type light emitting elements 34, respectively. In the preferred embodiment, the direct-type light emitting device 34 is a direct-type light emitting diode, and the power circuit board 35 can be a Printed Circuit Board (PCB) or a Flexible Printed Circuit (FPC).
The reflective element 36 is located between the light guide plate 33 and the power supply circuit board 35, and functions to reflect the light beam B exiting from the light guide plate 33, so that the light beam B enters the light guide plate 33 again, thereby improving the utilization efficiency of the light beam B. In the preferred embodiment, the reflective element 36 can be a reflective sheet or a reflective ink. When the reflective ink is used, the reflective ink may be printed or coated on the lower surface of the light guide plate 33 or the upper surface of the power supply circuit board 35, and when the reflective sheet is used, the reflective sheet opening 361 must be disposed on the reflective sheet for the direct-type light emitting element 34 to pass through and extend into the light guide plate opening 331.
In the key module 31, a plurality of keys 311 are partially exposed outside the light-emitting keyboard 3. The supporting plate 312 is disposed between the plurality of buttons 311 and the light guide plate 33 and connected to the plurality of buttons 311, and the supporting plate 312 includes a plurality of supporting plate holes 3121 corresponding to the plurality of direct-type light emitting elements 34 and a plurality of hooks 3122 corresponding to the plurality of buttons 3121. The switch circuit board 313 is disposed on the supporting board 312, and functions to be triggered by the button 311 to output a corresponding button signal. Each key 311 includes a key cap 314, a connecting element 315, and a triggering element 316. The key cap 314 is disposed above the supporting plate 312 and exposed outside the light-emitting keyboard 3, and the connecting element 315 is disposed between the corresponding key cap 314 and the supporting plate 312, and can connect the key cap 314 to the supporting plate 312 and move the key cap 314 up and down relative to the supporting plate 312, wherein the connecting element 315 can be respectively connected to the plurality of hooks 3122 of the key cap 314 and the supporting plate 312. The triggering element 316 is located between the corresponding key cap 314 and the switch circuit board 313, and can be pressed by the key cap 314 to deform so as to trigger the switch circuit board 313, or can be restored from the deformed state according to the elasticity of the triggering element 316, and simultaneously provide an upward elastic force to the key cap 314, so that the key cap 314 returns to the original position.
In the preferred embodiment, the triggering element 316 is made of a transparent material for the light beam B to pass through, and the connecting element 315 is a scissors-type connecting element, which is merely exemplary and not limited thereto. In another preferred embodiment, the plurality of keys can be actuated by using a non-scissor type of connecting element, such as a volcano-vent type connecting structure for desktop computers, and in addition, the up-and-down movement of the key cap can be controlled by magnetic force.
Referring to fig. 3 and fig. 4, fig. 4 is an exploded view of a switch circuit board of a light-emitting keyboard according to a preferred embodiment of the present invention. The switch circuit board 313 includes an upper wiring board 3131, a lower wiring board 3132, and an isolation layer 3133. The upper wiring board 3131 is in contact with the trigger element 316 and the upper wiring board 3131 has an upper conductive portion 3131A, and the upper conductive portion 3131A is disposed on a lower surface of the upper wiring board 3131. The lower wiring board 3132 is located below the upper wiring board 3131, the lower wiring board 3132 has a lower conductive portion 3132A, and the lower conductive portion 3132A is disposed on an upper surface of the lower wiring board 3132. In order to make the drawing clearly visible, the conductive traces electrically connected to the upper conductive portion 3131A and the lower conductive portion 3132A are not drawn in fig. 4. The isolation layer 3133 is located between the upper wiring board 3131 and the lower wiring board 3132, and the isolation layer 3133 has an isolation layer opening 3133A corresponding to the key cap 314, and the isolation layer 3133 functions to separate the upper conductive portion 3131A and the lower conductive portion 3132A. The upper conductive portion 3131A, the isolation layer opening 3133A, and the lower conductive portion 3231 together form a key switch, and each key switch corresponds to one key 311. When the trigger element 316 triggers the upper circuit board 301, the upper conductive portion 3131A extends into the isolation layer opening 3133A and contacts the lower conductive portion 3132A, so that the switch circuit board 313 is turned on and outputs a corresponding key signal.
In the preferred embodiment, the upper conductive portion 3131A and the lower conductive portion 3132A are both circular block conductive portions, which is only for illustrative purposes, but not limited thereto, and the upper conductive portion and the lower conductive portion may be designed as block conductive portions with various shapes, such as: rectangular, triangular or diamond-shaped bulk conductive parts. In another preferred embodiment, the upper conductive portion and the lower conductive portion may also adopt a design with a middle light-transmitting layer, such as: the light-transmitting hollow area is arranged in the center of the block-shaped conductive part, so that light beams can penetrate through the hollow area when passing through the block-shaped conductive part.
Referring to fig. 3 and 5, fig. 5 is a schematic side view of a partial structure of a light-emitting keyboard according to a preferred embodiment of the invention. The light shielding element 32 is disposed on the light guide plate 33 and functions to shield the light beam B, and a portion of the light shielding element 32 extends into the plurality of light guide plate openings 331, so that a portion of the light shielding element 32 can form a reflective portion 321 in each of the light guide plate openings 331. The light shielding element 32 further includes a plurality of protrusions 322 and a plurality of openings 323, each protrusion 322 corresponds to one light guide plate opening 331, and each opening 323 corresponds to one support plate opening 3121 and is located below the corresponding support plate opening 3121. The protrusions 322 respectively extend into the corresponding light guide plate openings 331, the shape of the protrusions 322 is complementary to the shape of the light guide plate openings 331, and the reflectors 321 are located on the sides of the corresponding protrusions 322. In other words, the plurality of protrusions 322 superpose the light shielding element 32 on the light guide plate 33, and press-fit the light shielding element 32 and the light guide plate 33 to form in the corresponding light guide plate openings 331. In the preferred embodiment, the reflective portion 321 is a reflective layer formed by printing or coating on the side of the protrusion portion 322, and the light shielding element 32 is a light shielding sheet, which is merely for illustration and not limited thereto. In another preferred embodiment, the light shielding element can be made of a reflective material, so that the reflective portion is a partial structure of the light shielding element extending into the opening of the light guide plate.
Fig. 5 shows the assembled structure of the components. When the direct-type light emitting element 34 is driven to generate the light beam B, the light beam B is projected upward and enters the light guide plate 33. Then, the light beam B is projected upward to the reflection portion 321 and reflected by the reflection portion 321, whereby the light beam B is totally reflected in the light guide plate 33. Wherein, a part of the light beam B passes through the opening 323 of the light shielding element 32, the opening 331 of the light guide plate and the switch circuit board 313 and is projected to the key cap 311, so as to generate a light emitting effect. On the other hand, the other part of the light beam B leaves the light guide plate 33 and is reflected by the reflection element 36, so that the other part of the light beam is totally reflected by the light guide plate 33 again, and the use efficiency of the light beam B can be improved.
In a preferred embodiment, the trigger element 316 may be a diffusion elastomer (Diffuser), so that the light beam B projected onto the trigger element 316 can be diffused to generate a more uniform light emitting effect. Wherein, the diffusion elastomer can be prepared by the following two ways: first, the trigger element 316 is made of a light diffusion material, and second, at least one of the outer surface and the inner surface of the trigger element 316 may be formed into a surface having a light diffusion function by a light diffusion surface treatment.
In view of the above, the light-emitting keyboard of the present invention employs the direct-type light-emitting device as the light-emitting source, and the light-emitting surface of the direct-type light-emitting device is larger than that of the conventional lateral-type light-emitting device, so that the direct-type light-emitting device can provide a light beam with higher power. In addition, the light-emitting surface of the direct-type light-emitting element is designed to be in contact with the lower surface of the light guide plate, that is, no gap exists between the direct-type light-emitting element and the light guide plate, so that most of light beams can be projected into the light guide plate, and the phenomenon of light waste is reduced. Finally, the light-shielding element is extended into the hole of the light guide plate to form a reflecting part to reflect the light beam, so that the light beam can travel in the light guide plate to generate a light traveling path similar to the existing lateral light-emitting element, and the light-emitting keyboard can emit light. Compared with the existing luminous keyboard, the luminous keyboard can provide higher-power light beams and reduce the situation of light waste. Therefore, the luminous keyboard of the invention can provide better luminous efficiency.
The above-mentioned embodiments are merely preferred embodiments of the present invention, which are not intended to limit the scope of the present invention, and therefore, all equivalent changes and modifications that do not depart from the spirit of the present invention are intended to be included within the scope of the appended claims.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711269452.XA CN109872907B (en) | 2017-12-05 | 2017-12-05 | illuminated keyboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711269452.XA CN109872907B (en) | 2017-12-05 | 2017-12-05 | illuminated keyboard |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109872907A CN109872907A (en) | 2019-06-11 |
| CN109872907B true CN109872907B (en) | 2021-08-06 |
Family
ID=66916682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711269452.XA Expired - Fee Related CN109872907B (en) | 2017-12-05 | 2017-12-05 | illuminated keyboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109872907B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202871648U (en) * | 2012-10-17 | 2013-04-10 | 苏州达方电子有限公司 | Thinned luminous keyboard |
| CN203055745U (en) * | 2012-12-19 | 2013-07-10 | 致伸科技股份有限公司 | Keyboard device with luminous keys |
| CN204332779U (en) * | 2014-12-02 | 2015-05-13 | 常熟精元电脑有限公司 | Backlit keyboard to prevent side light leakage |
| CN106340415A (en) * | 2016-08-31 | 2017-01-18 | 苏州达方电子有限公司 | Light emitting keyboard |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104279527A (en) * | 2013-07-11 | 2015-01-14 | 华通电脑股份有限公司 | Circuit board integrating backlight module and manufacturing method thereof |
| CN104576145B (en) * | 2013-10-28 | 2017-06-20 | 致伸科技股份有限公司 | Lighting keyboard |
| TWI556280B (en) * | 2015-07-03 | 2016-11-01 | 致伸科技股份有限公司 | Luminous keyboard |
-
2017
- 2017-12-05 CN CN201711269452.XA patent/CN109872907B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202871648U (en) * | 2012-10-17 | 2013-04-10 | 苏州达方电子有限公司 | Thinned luminous keyboard |
| CN203055745U (en) * | 2012-12-19 | 2013-07-10 | 致伸科技股份有限公司 | Keyboard device with luminous keys |
| CN204332779U (en) * | 2014-12-02 | 2015-05-13 | 常熟精元电脑有限公司 | Backlit keyboard to prevent side light leakage |
| CN106340415A (en) * | 2016-08-31 | 2017-01-18 | 苏州达方电子有限公司 | Light emitting keyboard |
Non-Patent Citations (1)
| Title |
|---|
| 发光键盘导光板设计与研究;戴文海;《中国优秀硕士学位论文全文数据库》;20130615;第1-5页 * |
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| CN109872907A (en) | 2019-06-11 |
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