CN115331996A - Luminous key - Google Patents
Luminous key Download PDFInfo
- Publication number
- CN115331996A CN115331996A CN202110509430.6A CN202110509430A CN115331996A CN 115331996 A CN115331996 A CN 115331996A CN 202110509430 A CN202110509430 A CN 202110509430A CN 115331996 A CN115331996 A CN 115331996A
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- China
- Prior art keywords
- light
- key
- layer
- emitting
- emitting device
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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.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
- H01H13/702—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 with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
- H01H13/705—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 with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by construction, mounting or arrangement of operating parts, e.g. push-buttons or keys
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
- H01H13/83—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by legends, e.g. Braille, liquid crystal displays, light emitting or optical elements
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- Push-Button Switches (AREA)
Abstract
The invention relates to a light-emitting key, which comprises a bottom plate, a thin film switch layer, a keycap, a lifting mechanism, a light-emitting device and a light shielding layer. The membrane switch layer is arranged on the bottom plate. The lifting mechanism is arranged between the bottom plate and the keycap. A gap is formed between the skirt edge of the keycap and the thin film switch layer. The light-emitting device is arranged in the through hole of the bottom plate. The light shielding layer is covered on the thin film switch layer and is used for shielding light emitted by the light emitting device and emitting partial light to a gap between the skirt edge of the keycap and the thin film switch layer. The light-emitting key of the invention enables the light emitted by the light-emitting device not to leak from the gap between the keycap and the thin film switch layer by forming the light shielding layer and the relative position of the light shielding layer and the light-emitting device.
Description
Technical Field
The present invention relates to a light-emitting key, and more particularly, to a light-emitting key in which light emitted from a light-emitting device does not leak from a gap between a key cap and a membrane switch layer.
Background
Keyboards are already a common input peripheral device on the market. Most of the prior art keyboards employ a light emitting device emitting light upward as a light source for defining indicator lights (e.g., case-locked on indicator lights, etc.) on a plurality of key caps. The existing keyboard also adopts a light-emitting device which emits light upwards as a backlight source of the light-emitting key to illuminate the pattern on the keycap. These keys with indicator lights and graphics that illuminate the keycap are collectively referred to as lighted keys.
However, the prior art light-emitting key employs a light-emitting device that emits light upward, and because the geometric relationship between the position where the light-emitting device is disposed and the elements and members of the keyboard is not considered, the light emitted by the light-emitting device often leaks from the gap between the keycap and the membrane switch layer. If the gap for leaking light of the prior art light-emitting key is designed to face the user, the leaked light is likely to be emitted to the eyes of the user.
In addition, typical keyboards have some light-emitting keys that are narrow and present long characters on the key cap, such as "prt sc sysrq" (shortcut key for screen capture). In order to illuminate long characters, such light-emitting keys are generally provided with a light-emitting device on each side. If the light-emitting device installed on the light-emitting key of the prior art is too close to the skirt edge of the key cap, the side surface of the light-emitting key is too bright and generates light spots.
Disclosure of Invention
The present invention is directed to a light-emitting key, in which light emitted from a light-emitting device does not leak from a gap between a key cap and a membrane switch layer, so as to prevent the leaked light from reaching eyes of a user or prevent light spots from being generated on a side surface of the light-emitting key.
According to an aspect of the present invention, the present invention provides a light-emitting key, comprising:
a bottom plate having a first through hole;
the membrane switch layer is arranged on the bottom plate;
the keycap comprises a main body and a skirt edge, wherein the skirt edge is formed by extending downwards from the periphery of the main body;
the lifting mechanism is arranged between the base plate and the keycap and limits the keycap to move between an unpressed position and a pressed position, and a gap is formed between the skirt edge and the thin film switch layer;
the light-emitting device is arranged in the first through hole and used for emitting light upwards, and the light irradiates the keycap and the gap; and
and the shading layer is covered on the thin film switch layer and is used for shading a part of light emitted to the gap by the light.
As an optional technical solution, the thin film switch layer includes an upper circuit thin film, an isolation layer, and a lower circuit thin film, and the isolation layer is disposed between the upper circuit thin film and the lower circuit thin film.
As an optional technical solution, the upper circuit film has a first upper surface and a first lower surface, the isolation layer has a second upper surface and a second lower surface, the lower circuit film has a third upper surface and a third lower surface, and the light shielding layer is coated on one of a group consisting of the first upper surface, the first lower surface, the second upper surface, the second lower surface, the third upper surface, and the third lower surface.
As an optional technical solution, the light shielding layer is parallel to the upper circuit film, the isolation layer and the lower circuit film.
As an optional technical solution, the light shielding layer projects onto a plane to form a first projection pattern, the top surface of the light emitting device projects onto the plane to form a second projection pattern, and the first projection pattern and the second projection pattern partially overlap.
As an optional technical solution, the thin film switch layer has a second through hole, and the second through hole is located above the first through hole.
As an optional technical solution, the light shielding layer has an edge, the light emitting device has an optical axis, the bottom plate has a cross-sectional centerline relative to the keycap, and the optical axis of the light emitting device is located between the edge of the light shielding layer and the cross-sectional centerline.
Alternatively, the gap is directed towards the user.
As an optional technical solution, the light emitting device has a top light emitting surface, and the light shielding layer covers a part of the top light emitting surface.
Unlike the prior art, the light-emitting key according to the present invention prevents the light emitted from the light-emitting device from leaking from the gap between the key cap and the membrane switch layer by forming the light-shielding layer and the relative positions of the light-shielding layer and the light-emitting device.
The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.
Drawings
Fig. 1 is an external view of a keyboard equipped with a first light-emitting key and a second light-emitting key according to a preferred embodiment of the present invention.
Fig. 2 isbase:Sub>A partial cross-sectional view ofbase:Sub>A first light-emitting key of the keyboard of fig. 1 taken along linebase:Sub>A-base:Sub>A.
Fig. 3 isbase:Sub>A partial cross-sectional view ofbase:Sub>A variation of the first light-emitting key of the keypad of fig. 1 taken along linebase:Sub>A-base:Sub>A.
Fig. 4 is a schematic projection view of a part of elements and components of the first light-emitting key shown in fig. 2 and 3 projected onto the same plane.
FIG. 5 is a partial cross-sectional view of a second illuminated key of the keyboard of FIG. 1 taken along line B-B.
Fig. 6 is a partial cross-sectional view of a variation of the second light-emitting key of the keypad of fig. 1 taken along line B-B.
Fig. 7 is a schematic projection view of a part of elements and components of the second light-emitting key shown in fig. 5 and 6 projected onto the same plane.
Detailed Description
Please refer to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5. Fig. 1 schematically shows a keyboard 1 equipped with a first light-emitting key 2a and a second light-emitting key 2b according to a preferred embodiment of the present invention in an external view. Fig. 2 isbase:Sub>A partial cross-sectional view of the first light-emitting key 2base:Sub>A of the keypad 1 of fig. 1 along the linebase:Sub>A-base:Sub>A. Fig. 3 isbase:Sub>A partial sectional view ofbase:Sub>A modification of the first light-emitting key 2base:Sub>A of the keypad 1 of fig. 1 taken along linebase:Sub>A-base:Sub>A. Fig. 4 is a schematic projection view of a part of elements and components of the first light-emitting key 2a shown in fig. 2 and 3 projected onto the same plane. Fig. 5 is a partial cross-sectional view of the second light-emitting key 2B of the keypad 1 of fig. 1 taken along line B-B. Fig. 6 is a partial sectional view of a modified example of the second light-emitting key 2B of the keyboard 1 of fig. 1 taken along the line B-B. Fig. 7 is a schematic projection view of a part of elements and components of the second light-emitting key 2b shown in fig. 5 and 6 projected onto the same plane.
As shown in fig. 1 and 2, the keyboard 1 according to the preferred embodiment of the present invention includes a first light-emitting key 2a equipped with a light-emitting device 24. The key cap 22 of the first light-emitting key 2a has a first top surface 220 and a light-transmitting region 222. A light transmissive region 222 is formed on the first top surface 220 of the key cap 22. In the example shown in fig. 1 and 2, the light-transmitting area 222 represents an indicator light, but the invention is not limited thereto. According to the keyboard 1 of the preferred embodiment of the present invention, the first light-emitting key 2a may also be the first light-emitting key 2a with a light-emitting pattern. That is, the light-transmitting region 222 on the key cap 22 can also present a pattern representing one of a character, a number, a symbol, and a function key. The light-transmitting region 222 on the key cap 22 of the second light-emitting key 2b in fig. 1 is also only schematically illustrated, and does not represent a real pattern.
As shown in fig. 2, the first light-emitting key 2a includes a base plate 20, a thin film switch layer 21, a key cap 22, an elevating mechanism 23, a light-emitting device 24, and a light-shielding layer 25. If the translucent region 222 of the key cap 22 represents an indicator light, the first light-emitting key 2a according to the present invention may be provided with only one light-emitting device 24. If the light-transmitting area 222 of the first light-emitting key 2a according to the present invention represents a pattern of characters, numerals, symbols, function keys, etc., the first light-emitting key 2a according to the present invention may be provided with a plurality of light-emitting devices 24, and particularly, the light-transmitting area 222 represents the first light-emitting key 2a of long characters. In fig. 2, only one light emitting device 24 is shown as a representative. The light emitting device 24 is driven to emit light. Light emitted by the light emitting device 24 is directed toward the light transmissive region 222 of the key cap 22 and through the light transmissive region 222 of the key cap 22.
In one embodiment, each of the light-emitting devices 24 may include at least one light-emitting element such as a semiconductor light-emitting diode element or at least one organic light-emitting diode element.
The base plate 20 has a first through hole 202. The membrane switch layer 21 is disposed on the base plate 20.
The key cap 22 includes a body 224 and a skirt 226. The skirt 226 of the key cap 22 extends downwardly from the periphery of the main body 224 of the key cap 22. The lifting mechanism 23 is disposed between the base plate 20 and the key cap 22. The elevating mechanism 23 restricts the movement of the key top 22 between the non-pressed position and the pressed position. A gap 228 is provided between the skirt 226 of the key cap 22 and the membrane switch layer 21.
The light emitting device 24 is disposed in the first through hole 202 of the base plate 20. The light emitting device 24 is used to emit light upward. Light emitted by the light-emitting device 24 is directed towards the key cap 22 and the gap 228 between the skirt 226 of the key cap 22 and the membrane switch layer 21. The light-shielding layer 25 covers the thin-film switching layer 21. The light shielding layer 25 is used to shield the light emitted from the light emitting device 24 and a part of the light emitted to the gap 228 between the skirt 226 of the key cap 22 and the thin film switch layer 21.
In one embodiment, as shown in FIG. 2, the membrane switch layer 21 includes an upper circuit film 212, an isolation layer 214, and a lower circuit film 216. The isolation layer 214 is disposed between the upper circuit film 212 and the lower circuit film 216. The upper circuit film 212 has a first upper surface 2120 and a first lower surface 2122, the isolation layer 214 has a second upper surface 2140 and a second lower surface 2142, and the lower circuit film 216 has a third upper surface 2160 and a third lower surface 2162. The light-shielding layer 25 may be coated on the first upper surface 2120 of the upper circuit film 212, or on the first lower surface 2122 of the upper circuit film 212, or on the second upper surface 2140 of the isolation layer 214, or on the second lower surface 2142 of the isolation layer 214, or on the third upper surface 2160 of the lower circuit film 216, or on the third lower surface 2162 of the lower circuit film 216. In the example shown in fig. 2, the light shielding layer 25 covers the first upper surface 2120 of the upper circuit film 212.
In one embodiment, also shown in FIG. 2, the light shielding layer 25 is parallel to the upper circuit film 212, the isolation layer 214, and the lower circuit film 216.
In one embodiment, also shown in FIG. 2, the membrane switch layer 21 has a second via 210. The second through hole 210 of the membrane switch layer 21 is located above the first through hole 202 of the base plate 20.
As shown in fig. 3, in a modification of the first light-emitting key 2a according to the preferred embodiment of the invention, the membrane switch layer 21 covers the first through hole 202 of the base plate 20. In addition, the upper circuit film 212, the isolation layer 214 and the lower circuit film 216 of the thin film switch layer 21 are transparent elements. In the example shown in fig. 3, the light shielding layer 25 covers the first upper surface 2120 of the upper circuit film 212, but the invention is not limited thereto. The elements and components in fig. 3 having the same numbers as those in fig. 2 have the same or similar structures and functions, and are not repeated herein.
In one embodiment, as shown in fig. 2 and 3, the light-shielding layer 25 has an edge 252. The light emitting device 24 has an optical axis 242 perpendicular to the second top surface 240 and a light footprint surrounding the optical axis 242 and facing upward. The light footprint is substantially conical. The base 20 has a cross-sectional centerline 204 with respect to the keycap 22. The optical axis 242 of the light-emitting device 24 is located between the edge 252 of the light-shielding layer 25 and the sectional center line 204 of the chassis 20.
In one embodiment, as also shown in fig. 2 and 3, the gap 228 is located near the user. The light shielding layer 25 can shield a portion of the light emitted by the light emitting device 24 and directed to the gap 228 between the skirt 226 of the key cap 22 and the thin-film switch layer 21 (e.g., the light emitting device has a top light emitting surface, and the light shielding layer substantially covers a portion of the top light emitting surface of the light emitting device, in other words, the edge of the light shielding layer is located between the edge of the top light emitting surface of the light emitting device and the optical axis), and no leakage of the light to the eyes 3 of the user occurs. In fig. 2 and 3, the user's eye 3 is indicated.
As shown in fig. 4, the light shielding layer 25 of the first light-emitting key 2a projects onto a plane to form a first projection pattern, and the second top surface 240 of the light-emitting device 24 projects onto the same plane to form a second projection pattern. The first projected pattern partially overlaps the second projected pattern. In fig. 4, the first and second projected patterns are represented by the symbols of the light shielding layer 25 and the second top surface 240 of the light emitting device 24. In fig. 4, the optical axis 242 of the light-emitting device 24, the sectional center line 204 of the bottom plate 20, and the edge 252 of the light-shielding layer 25 are also schematically illustrated to show the relative positions of the components of the first light-emitting key 2a according to the preferred embodiment of the invention. In fig. 4, the position of the user's eyes 3 is also schematically shown. In the example shown in fig. 4, the light emitting device 24 is located close to the user's eyes 3.
As also shown in FIG. 4, the skirt 226 of the key cap 22 of the first light-emitting key 2a is also schematically indicated in FIG. 4 to represent a third projection pattern formed by projecting the skirt 22 of the key cap 22 onto the same plane. In the example shown in fig. 4, the inner boundary of the first projected pattern projected by the light shielding layer 25 is located within the inner boundary of the third projected pattern projected by the skirt 22, and the outer boundary of the first projected pattern is located outside the outer boundary of the third projected pattern. Thereby, the light shielding layer 25 can more effectively prevent light from leaking from the gap 228 toward the user's eye 3 and other gaps.
Further, as also shown in fig. 2 and 3, the first light-emitting key 2a according to the preferred embodiment of the present invention further includes a circuit board 26. The light emitting device 24 is electrically connected to the circuit board 26. The circuit board 26 is disposed on the bottom surface 206 of the base plate 20 such that the light emitting device 24 is disposed in the first through hole 202 of the base plate 20.
Further, as also shown in fig. 2 and 3, the first light-emitting key 2a according to the preferred embodiment of the present invention further includes a resilient actuating element 27. Membrane switch layer 21 includes a switch 218. The switch 218 is located below the keycap 22. The resilient actuation element 27 is disposed between the keycap 22 and the base plate 20, and is located above the switch 218. When the key cap 22 is pressed and moved to the pressed position, the elastic actuation element 27 is deformed and the actuation switch 218 is turned on. When the key cap 22 is released, the resilient actuation element 27 provides the restoring force required to return the key cap 22 to the un-depressed position, and the switch 218 is closed.
As shown in fig. 5, the second light-emitting key 2b includes two light-emitting devices 24 respectively disposed at two sides of the second light-emitting key 2b, i.e. respectively near the gaps 228 between the skirt edges 226 at two sides of the key cap 22 and the membrane switch layer 21. The base plate 20 has two first through holes 202. Each of the light emitting devices 24 is disposed in a first through hole 202 of the base plate 20. The membrane switch layer 21 has two second through holes 210. Each second through hole 210 is located above one first through hole 202 of the base plate 20. The light shielding layer 25 can shield the light emitted from the light emitting device 24 and emit a part of the light to the gap 228 between the skirt 226 at two sides of the key cap 22 and the thin film switch layer 21, without generating light spots at the side of the second light emitting key 2 b. The elements and components in fig. 5 having the same numbers as those in fig. 2 have the same or similar structures and functions, and are not repeated herein.
As shown in fig. 6, in a modification of the second luminescent key 2b according to the preferred embodiment of the invention, the membrane switch layer 21 covers two first through holes 202 of the bottom plate 20. The upper circuit film 212, the isolation layer 214 and the lower circuit film 216 of the thin film switch layer 21 are transparent elements. In the example shown in fig. 6, the light shielding layer 25 covers the first upper surface 2120 of the upper circuit film 212, but the invention is not limited thereto. In fig. 6, elements and components having the same numbers as those in fig. 2 and 5 have the same or similar structures and functions, and are not repeated herein.
As shown in fig. 7, the light shielding layer 25 of the second light-emitting key 2b is projected onto a plane to form a first projected pattern. The second light-emitting key 2b according to the present invention comprises two light-emitting devices 24 respectively disposed in the gaps 228 between the skirt edges 226 near the two sides of the key cap 22 and the membrane switch layer 21. The second top surfaces 240 of the two light-emitting devices 24 are projected onto the same plane in two second projection patterns. The first projected pattern is partially overlapped with the two second projected patterns, respectively. In fig. 7, the first projected pattern and the two second projected patterns are represented by symbols of the light shielding layer 25 and the second top surface 240 of the light emitting device 24. In fig. 7, the optical axes 242 of the two light-emitting devices 24, the sectional center line 204 of the bottom plate 20, and the two edges 252 of the light-shielding layer 25 are also schematically illustrated to show the relative positions of the components of the second light-emitting key 2b according to the preferred embodiment of the invention.
As also shown in FIG. 7, the skirt 226 of the key cap 22 of the second light-emitting key 2b is also schematically indicated in FIG. 7 to represent a third projection pattern formed by projecting the skirt 22 of the key cap 22 onto the same plane. In the example shown in fig. 7, the inner boundary of the first projected pattern projected by the light shielding layer 25 is located within the inner boundary of the third projected pattern projected by the skirt 22, and the outer boundary of the first projected pattern is located outside the outer boundary of the third projected pattern. Accordingly, the light shielding layer 25 can more effectively prevent the light from leaking from the side surface of the second light-emitting key 2b to generate the flare.
As can be clearly understood from the above description of the present invention, the light-emitting key according to the present invention forms the light-shielding layer and the relative position between the light-shielding layer and the light-emitting device, so that the light emitted by the light-emitting device does not leak from the gap between the key cap and the thin-film switch layer.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (9)
1. A luminescent key, comprising:
a bottom plate having a first through hole;
the membrane switch layer is arranged on the bottom plate;
the keycap comprises a main body and a skirt edge, wherein the skirt edge is formed by extending downwards from the periphery of the main body;
the lifting mechanism is arranged between the base plate and the keycap and limits the keycap to move between an unpressed position and a pressed position, and a gap is formed between the skirt edge and the thin film switch layer;
the light-emitting device is arranged in the first through hole and used for emitting light upwards, and the light irradiates the keycap and the gap; and
and the shading layer is covered on the thin film switch layer and is used for shading a part of light emitted to the gap by the light.
2. The luminescent key of claim 1, wherein the membrane switch layer comprises an upper circuit membrane, an isolation layer and a lower circuit membrane, the isolation layer being disposed between the upper circuit membrane and the lower circuit membrane.
3. The luminescent key of claim 2, wherein the upper circuit film has a first upper surface and a first lower surface, the isolation layer has a second upper surface and a second lower surface, the lower circuit film has a third upper surface and a third lower surface, and the light-shielding layer is coated on one of the group consisting of the first upper surface, the first lower surface, the second upper surface, the second lower surface, the third upper surface and the third lower surface.
4. The luminescent key of claim 2, wherein the light-shielding layer is parallel to the upper circuit film, the isolation layer and the lower circuit film.
5. The illuminated key of claim 1, wherein the light-shielding layer projects onto a plane in a first projected pattern, the top surface of the light-emitting device projects onto the plane in a second projected pattern, and the first projected pattern partially overlaps the second projected pattern.
6. The illuminated key of claim 1, wherein the membrane switch layer has a second via hole, the second via hole being located above the first via hole.
7. The illuminated key of claim 1, wherein the light-shielding layer has an edge, the light-emitting device has an optical axis, the bottom plate has a cross-sectional centerline relative to the key cap, and the optical axis of the light-emitting device is located between the edge of the light-shielding layer and the cross-sectional centerline.
8. The illuminated key of claim 1, wherein the gap is oriented toward a user.
9. The illuminated key of claim 1, wherein the illumination device has a top illumination surface, and the light blocking layer covers a portion of the top illumination surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110509430.6A CN115331996A (en) | 2021-05-11 | 2021-05-11 | Luminous key |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110509430.6A CN115331996A (en) | 2021-05-11 | 2021-05-11 | Luminous key |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115331996A true CN115331996A (en) | 2022-11-11 |
Family
ID=83912529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110509430.6A Pending CN115331996A (en) | 2021-05-11 | 2021-05-11 | Luminous key |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115331996A (en) |
-
2021
- 2021-05-11 CN CN202110509430.6A patent/CN115331996A/en active Pending
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