CN117012572A - Luminous fingerprint identification key and keyboard - Google Patents
Luminous fingerprint identification key and keyboard Download PDFInfo
- Publication number
- CN117012572A CN117012572A CN202210470377.8A CN202210470377A CN117012572A CN 117012572 A CN117012572 A CN 117012572A CN 202210470377 A CN202210470377 A CN 202210470377A CN 117012572 A CN117012572 A CN 117012572A
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- Prior art keywords
- light
- key
- light source
- circuit board
- fingerprint identification
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- 239000010409 thin film Substances 0.000 claims abstract description 23
- 230000005540 biological transmission Effects 0.000 abstract description 2
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- 230000000694 effects Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000012780 transparent material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 239000004417 polycarbonate Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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
- H01H13/70—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
- H01H13/86—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 the casing, e.g. sealed casings or casings reducible in size
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Abstract
The invention discloses a luminous fingerprint identification key and a keyboard, which are provided with a backlight structure for the fingerprint identification key. The key cap of the luminous fingerprint identification key according to an embodiment is of a multi-layer structure and is provided with a shading layer, so that light rays can show a light transmission pattern of the shading layer when passing through the key cap. According to another embodiment, the luminous fingerprint identification key is provided with a reflecting sheet below the light-permeable key cap, and the light is reflected by the reflecting sheet to display patterns on the reflecting sheet. A keyboard according to another embodiment comprises any of the illuminated fingerprint recognition keys described above. The light source of the luminous fingerprint identification key of the keyboard according to another embodiment is positioned below the thin film circuit board of the keyboard, and the light emitted by the light source is guided by the supporting structure of the luminous fingerprint identification key to provide backlight for the keycap of the luminous fingerprint identification key.
Description
Technical Field
The present invention relates to a fingerprint recognition key and a keyboard, and more particularly, to a fingerprint recognition key with backlight and a keyboard with fingerprint recognition key.
Background
With the development of fingerprint recognition technology, fingerprint recognition devices have been integrated into various electronic devices, such as keyboards, mobile devices, etc., which can increase security applications. The key caps of the fingerprint recognition keys typically have only a printed graphic representation. When the fingerprint identification key is used in an environment with insufficient light, a user cannot easily find the position of the fingerprint identification key, so that the fingerprint identification key is inconvenient to use. In addition, if the fingerprint recognition key is integrated into a keyboard with a backlight, the backlight can only overflow from the periphery of the key cap of the fingerprint recognition key due to the arrangement of the recognition unit, the key cap does not pass through the backlight, and the top surface of the key cap still needs to be illuminated by ambient light if the diagram is displayed, so that the optical indication effect provided by the backlight structure is limited.
Disclosure of Invention
In view of the problems in the prior art, the present invention provides a light-emitting fingerprint identification key and a keyboard to solve the above problems.
In order to achieve the above object, the present invention provides a luminous fingerprint identification key, comprising:
the key cap is of a multi-layer structure, the multi-layer structure comprises a light-transmitting carrier layer and a light-shielding layer, and the light-shielding layer is provided with a light-transmitting pattern;
a light guide sheet overlapped under the key cap;
the fingerprint identification element is overlapped below the light guide plate; and
the light source is arranged below the keycap, and light rays emitted by the light source enter the light guide sheet to provide backlight for the keycap.
As an optional technical solution, the multilayer structure further comprises a semitransparent layer, and the semitransparent layer is located between the light-transmitting carrier layer and the light-shielding layer.
As an alternative solution, the light-transmitting pattern is located right above the sensing surface of the fingerprint identification element.
The invention also provides another luminous fingerprint identification key, which comprises:
a key cap, the key cap being light-transmissive;
a light guide sheet overlapped under the key cap;
a reflection sheet which is overlapped under the light guide sheet and has a display pattern;
a fingerprint identification element which is overlapped under the reflecting sheet; and
the light source is overlapped below the keycap, and the light emitted by the light source enters the light guide plate and is reflected by the reflecting plate to be emitted to the keycap.
As an alternative solution, the display pattern is located directly above the sensing surface of the fingerprint identification element.
As an alternative solution, the light source is disposed towards a side surface of the light guide sheet, so that the light emitted by the light source enters the light guide sheet from the side surface.
As an optional technical solution, the luminous fingerprint identification key further comprises a circuit board, wherein the fingerprint identification element and the light source are electrically fixed on the circuit board.
The invention also provides a keyboard comprising a plurality of keys, wherein one of the keys is the luminous fingerprint identification key.
The invention also proposes a keyboard comprising:
a bottom plate;
the thin film circuit board is arranged on the bottom plate, can transmit light and comprises a plurality of switches;
the first keycaps are arranged on the thin film circuit board corresponding to the switches;
the first support structures are correspondingly connected between the first keycaps and the bottom plate;
the second supporting structure is arranged on the bottom plate;
the fingerprint identification element is overlapped on the second supporting structure;
the second keycap covers the fingerprint identification element and is provided with a light-transmitting pattern; and
the light source is arranged below the thin film circuit board adjacent to the second supporting structure, and light rays emitted by the light source are guided by the second supporting structure to provide backlight for the second keycap.
As an alternative solution, the thin film circuit board has a light shielding area, which covers the light source.
As an optional technical scheme, the keyboard further comprises a light source circuit board, the light source circuit board is arranged below the thin film circuit board, wherein the light source is electrically fixed on the light source circuit board and is positioned below the light source circuit board.
Compared with the prior art, the luminous fingerprint identification key and the keyboard with the luminous fingerprint identification key have the advantages that the backlight can directly penetrate through the keycap through the design in the luminous fingerprint identification key so as to directly display the light transmission pattern on the keycap, and a user can conveniently and accurately find the position of the luminous fingerprint identification key.
The invention will now be described in more detail with reference to the drawings and specific examples, which are not intended to limit the invention thereto.
Drawings
Fig. 1 is an exploded view of a luminescent fingerprint recognition key according to a first embodiment.
Fig. 2 is a cross-sectional view of the illuminated fingerprint recognition key of fig. 1.
Fig. 3 is a cross-sectional view of the key cap of fig. 2 according to an embodiment.
Fig. 4 is a cross-sectional view of an application example of the luminous fingerprint recognition key.
Fig. 5 is a sectional view of a luminescent fingerprint recognition key according to a second embodiment.
Fig. 6 is a schematic diagram of a keyboard according to a third embodiment.
Fig. 7 is a partial cross-sectional view of the keyboard of fig. 6 taken along line X-X.
Fig. 8 is a partial cross-sectional view of a keyboard according to a fourth embodiment.
Detailed Description
For a further understanding of the objects, construction, features and functions of the invention, reference should be made to the following detailed description of the preferred embodiments.
Referring to fig. 1 and 2 (the cross section is not shown with cross section lines for convenience of representing the light path), fig. 1 is an exploded view of a luminous fingerprint recognition key according to a first embodiment; fig. 2 is a cross-sectional view of the illuminated fingerprint recognition key of fig. 1. The luminous fingerprint recognition key 1 of the first embodiment of the present invention comprises a key cap 10, a light guide 12, a fingerprint recognition element 14, two light sources 16 and a circuit board 18 (such as but not limited to a flexible circuit board). The light guide sheet 12 is stacked under the key cap 10. The fingerprint identification element 14 is stacked under the light guide 12. A light source 16, such as but not limited to a light emitting diode, is disposed below the key cap 10. The fingerprint identification element 14 and the light source 16 are electrically fixed on the circuit board 18, and the operation of the fingerprint identification element 14 and the light source 16 is controlled through the circuit board 18. Light (shown in fig. 2 by arrows) emitted from light source 16 enters light guide 12 through side 124 of light guide 12 and exits light guide 12 through light exit face 122 of light guide 12 to backlight key cap 10. The circuit board 18 has a connection interface 182 (e.g., a connector or a gold finger) for communication with the outside to receive power (and control signals, etc.).
In the first embodiment, the key cap 10 has a multi-layer structure comprising a light-transmitting carrier layer 102 and a light-shielding layer 104, wherein the light-shielding layer 104 has a light-transmitting pattern 104a (shown in fig. 2 by a dashed box; in fig. 1, for example, but not limited to, a fingerprint pattern is shown when light passes through the key cap 10). The light-transmitting carrier layer 102 may be, but is not limited to, transparent, and may be, but is not limited to, polycarbonate (PC) or glass. The light shielding layer 104 may be printed or otherwise formed on the light transmissive carrier layer 102. The light-transmitting carrier layer 102 serves as a protective cover for the light-transmitting pattern 104a in addition to the light-shielding layer 104 carrier substrate. In practical applications, the light shielding layer 104 may be disposed above the light-transmitting carrier layer 102, and other materials are used to cover the light-transmitting pattern 104a for protection. When the backlight passes through the key cap 10, the light-transmitting pattern 104a can be seen by the user as an optical indication.
In practical applications, the multi-layer structure of the key cap 10 may include more layers according to design requirements. As shown in fig. 3 (the cross-section is not shown with a cross-section line for convenience in comparison with fig. 2), which is a variation of the key cap 10, i.e., the key cap 10'. In contrast to the key cap 10 of fig. 2, the key cap 10' also includes a light transmissive coating 106 and a translucent layer 108. The light-transmissive coating 106 is located between the light-transmissive carrier layer 102 and the light-shielding layer 104. The light-transmitting coating 106 has a light-transmitting effect, and the color of the light-transmitting coating can be similar to the appearance color of the device arranged on the luminous fingerprint identification key 1; for example, if the illuminated fingerprint recognition key 1 is disposed on a notebook computer (e.g., integrated into an arrangement of keys of a keyboard), the color of the light-transmissive coating 106 may be similar to the color of the housing of an adjacent keyboard or similar to the color of the key caps of other keys. This may promote a substantially uniform color throughout the overall appearance (e.g., the entire keyboard). The translucent layer 108 is located between the light transmissive coating 106 and the light shielding layer 104. The semitransparent layer 108 also has a light transmitting effect; for example, the translucent layer 108 may be slightly gray in color, which may be used to adjust the intensity of light exiting the key cap 10'. In practical applications, the number of layers and the materials thereof are determined according to the actual design requirements, and are not limited by the previous examples.
In addition, please refer back to fig. 1 and 2. In the first embodiment, the light-transmitting pattern 104a is located directly above the sensing surface 14a (facing the key cap 10) of the fingerprint identification device 14, so that the user can intuitively, rapidly and accurately find the position of the sensing surface 14a to effectively perform fingerprint identification. The light emitted by the light source 16 can still effectively provide enough backlight to the light-transmitting pattern 104a through the guidance of the light guide 12. Light source 16 is positioned toward side 124 of light guide 12 such that light emitted by light source 16 enters light guide 12 from side 124. The two light sources 16 are oppositely disposed at two sides of the light guide 12, which is helpful for making the backlight uniform, but not limited to this in practical application; for example, more or fewer light sources 16 may be used to provide light. In addition, for example, the backlight uniformity can be improved by forming the light reflecting structure by a single light source (for example, coating the side surface of the light guiding plate 12 with the light reflecting material). In addition, in practical applications, the fingerprint recognition device 14 may be selected from fingerprint recognition devices that are not affected by the light generated by the light source 16, such as but not limited to fingerprint recognition devices using capacitive sensors.
In addition, in the first embodiment, the key cap 10, the light guide 12, the fingerprint recognition element 14, the light source 16 and the circuit board 18 are designed to be fixedly arranged, but the present invention is not limited thereto. For example, in practical applications (please refer to fig. 4; for convenience of comparison with fig. 2, the cross section is not shown with a cross section line), the luminous fingerprint sensor key 1 may further include a base plate 20 (shown in fig. 4 in a flat cross section) and a supporting structure 22 (shown in fig. 4 in a block simplified manner), wherein the supporting structure 22 is disposed on the base plate 2, and the circuit board 18 is disposed on the supporting structure 22. The support structure 22 may provide for movement of the circuit board 18 (along with the light guide 12, key cap 10) up and down. For example, the support structure 22 may include a scissor bracket 220 (illustrated in fig. 4 with a simple geometry shown in phantom) and a carrier plate 222 (illustrated in fig. 4 with a flat cross-section shown in phantom), the scissor bracket 220 being connected between the base plate 20 and the carrier plate 222, the circuit board 18 being disposed on the carrier plate 222; however, the present invention is not limited thereto. In practical applications, the fingerprint identification element 14 can be activated after the key cap 10 is pressed; for example, the key cap 10 is pressed to trigger the switch 224 (shown in phantom in FIG. 4, e.g., by the carrier plate 222; the switch 224 is electrically connected to the circuit board 18). If the illuminated fingerprint sensor key 1 is integrated into a keyboard, the base plate 20 is also integrated with the base plate (for supporting other keys) of the keyboard. In addition, the whole structure shown in fig. 4 can be regarded as a luminous fingerprint recognition key (i.e. including the luminous fingerprint recognition key 1, the base plate 20 and the supporting structure 22 in the figure).
Please refer to fig. 5. The luminous fingerprint recognition key 3 according to the second embodiment is similar to the luminous fingerprint recognition key 1 in terms of structural logic, and the main difference is that the optical indication of the luminous fingerprint recognition key 1 is generated by the light-transmitting pattern 104a in the key cap 10, and the optical indication of the luminous fingerprint recognition key 3 is generated by the display pattern 33a (the position of which is shown by the dotted line box in fig. 5) on the reflective sheet 33. Therefore, the above description about the luminous fingerprint recognition key 1 (and its variants) is applicable here, and is not repeated. In the second embodiment, the luminous fingerprint recognition key 3 comprises a key cap 30, a light guide 32, a reflective sheet 33, a fingerprint recognition element 34, two light sources 36 and a circuit board 38. The key cap 32 is transparent to light. The light guide sheet 32 is stacked under the key cap 30. The reflection sheet 33 is stacked under the light guide sheet 32. The fingerprint recognition element 34 is stacked under the reflective sheet 33. The light source 36 is disposed below the key cap 30. The fingerprint identification element 34 and the light source 36 are electrically fixed on the circuit board 38, and the operation of the fingerprint identification element 34 and the light source 36 is controlled by the circuit board 38. Light (represented by arrows in fig. 5) emitted by light source 36 enters light guide 32 via side 324 of light guide 32 and exits light guide 32 via light exit face 322 of light guide 32 to backlight key cap 30; the light in the light guide 32 is reflected by the reflective sheet 33 and is directed to the key cap 30, and a display pattern 33a is displayed, which can be seen by a user as an optical indication.
In addition, in the second embodiment, the display pattern 33a is located directly above the sensing surface 34a (the surface facing the key cap 30) of the fingerprint recognition element 34, so that the user can intuitively, quickly and accurately find the position of the sensing surface 34a to effectively perform fingerprint recognition. In addition, the above-mentioned arrangement and efficacy of the light-transmitting coating 106 and the translucent layer 108 in the luminous fingerprint recognition key 1 can also be applied to the luminous fingerprint recognition key 3. For example, a light-transmissive coating and a translucent layer are disposed between the key cap 30 and the light guide 32.
In practical applications, the illuminated fingerprint recognition keys 1, 3 may be arranged on a keyboard (e.g. a single keyboard, or a keyboard on a notebook computer). Referring to fig. 6 and 7, the keyboard 4 according to the third embodiment includes a plurality of keys 40a, 40b and a housing 42 for accommodating the plurality of keys. One of the plurality of keys 40a, 40b is a light emitting fingerprint recognition key 40a, and for convenience of description, the light emitting fingerprint recognition key 40a uses the reference symbol of the light emitting fingerprint recognition key 1 for the example of the light emitting fingerprint recognition key 1. For other descriptions of the light-emitting fingerprint-recognition key 40a, please refer to the light-emitting fingerprint-recognition key 1 and the related descriptions of the variation thereof, and the descriptions are omitted. When the luminous fingerprint-recognition key 40a is fixedly disposed, the top surface of the key cap 10 of the luminous fingerprint-recognition key 40a may be designed to be flush with the top surface of the housing 42.
In addition, in the third embodiment, the key 40b is a mechanical key, but the present invention is not limited thereto. To simplify the drawing, the support structure 44 of the key 40b is represented by a simple geometric block. In practice, the support structure 44 may be, but is not limited to, a scissor bracket. The base plate 46 of the keyboard 4 simultaneously supports the normal keys 40b and the illuminated fingerprint recognition keys 40a. In addition to providing the switching function of the normal key 40b (wherein the switch 482 is shown as a single block), the circuit board 18 of the luminous fingerprint recognition key 40a can be integrated with the switching circuit board 48 according to the design in practical application.
In the foregoing luminescent fingerprint recognition keys 1, 3 (and luminescent fingerprint recognition key 40 a), the light sources 16, 36 are disposed adjacent to the circuit boards 18, 38, and the light emitted by the light sources 16, 36 can directly enter the light guide 12, 32 to provide backlight for the key caps 10, 30. However, in practical applications, the light-emitting fingerprint recognition key may also be configured such that the light source is relatively far from the key cap design. Please refer to fig. 8, which is a partial cross-sectional view of a keyboard 5 according to a fourth embodiment. The keyboard 5 is similar in appearance to the keyboard 4 and is not shown. The keyboard 5 comprises a housing 50, a bottom plate 52 accommodated in the housing 50, a thin film circuit board 54, a plurality of first key caps 56, a plurality of first supporting structures 58, a second supporting structure 60, a fingerprint identification element 62, a second key cap 64 and two light sources 66. The thin film circuit board 54 has a three-layer structure in practical application, wherein the upper and lower layers are respectively provided with a switch circuit, and an insulating layer is arranged between the upper and lower layers; for simplicity of illustration, the thin film circuit board 54 is shown in a single structure. The thin film circuit board 54 is disposed on the base plate 52 and includes a plurality of switches 542 (shown as a single block). The plurality of first key caps 56 are disposed on the thin film circuit board 52 corresponding to the plurality of switches 542. The plurality of first support structures 58 are correspondingly coupled between the plurality of first keycaps 56 and the bottom plate 52 such that the first keycaps 56 can be moved up and down relative to the bottom plate 52 via the corresponding first support structures 58 to cause the corresponding switches 542 to be activated. The second support structure 60 is disposed on the base plate 52. The fingerprint recognition element 62 is stacked on the second support structure 60. The second key cap 64 covers the fingerprint recognition element 62. The light source 66 is disposed under the thin film circuit board 54 adjacent to the second support structure 60, and light emitted by the light source 66 is guided by the second support structure 60 to backlight the second key cap 64.
In the fourth embodiment, the second supporting structure 60 can be made of a transparent material, so that the light emitted from the light source 66 can pass through and be directed to the second keycap 64. In addition, due to the light-permeable property of the structural material of the second support structure 60, the second support structure 60 also has the effect of guiding light, such that the light source 66 is not adjacent to the second keycap 64, but the emitted light can penetrate into the structure of the second support structure 60 and be guided by the light source to be emitted to the second keycap 64; this configuration aids in the utilization of the light emitted by the light source 66. In addition, in practical applications, the second supporting structure 60 may be designed to fixedly support the second keycap 64 and the fingerprint recognition element 62, and may also be designed to movably support the second keycap 64 and the fingerprint recognition element 62. In regard to the latter, for example, similar to the structure shown in fig. 2, the second support structure 60 may comprise a base plate, a carrier plate, and a scissor leg support (or other mechanism providing lifting) connecting the base plate and the carrier plate, and the base plate may be fixed to the base plate 52 (e.g., locked or riveted) of the keyboard 5 or the housing 50, or may be integrally formed directly with the base plate 52 of the keyboard 5. The fingerprint recognition element 62 (together with the second key cap 64) is fixed on the carrier plate, so that the fingerprint recognition element 62 (together with the second key cap 64) can move up and down relative to the base plate via the scissor bracket. In addition, in practical applications, a switch may be disposed on the base plate, which may be triggered after the second key cap 64 is pressed. Thus, the actuation of the fingerprint recognition element 62 may be designed to be initiated after the switch is triggered. The above description of the support structure 22 in fig. 2 is applicable, and is not repeated.
In the fourth embodiment, the second key cap 64 has a transparent pattern 64a (shown in the figure with a dotted frame), so that when the backlight passes through the second key cap 64, the transparent pattern 64a can be seen by the user as an optical indication graphic, so that the user can intuitively, quickly and accurately find the position of the sensing surface 62a of the fingerprint recognition element 62 to effectively perform fingerprint recognition. In addition, in practical applications, the second key cap 64 may have a multi-layer structure similar to the key cap 10 to form the light-transmitting pattern 64a, but is not limited thereto. For example, the second key cap 64 is made of a transparent material, and an opaque layer (e.g. an opaque paint) is disposed on the surface of the transparent key cap to form a transparent pattern 64a.
In the fourth embodiment, the light source 66 is located in the avoidance hole 522 of the bottom plate 52 and below the thin film circuit board 54, and this configuration helps to suppress the overall height of the keyboard 5. If the thin film circuit board 54 is transparent (for example, the three-layer structure of the thin film circuit board 54 is made of transparent materials), a light shielding region 54a can be formed on the thin film circuit board 54 (for example, an opaque layer (for example, an opaque paint is coated on the upper surface of the thin film circuit board 54, the distribution range of which is shown in the figure by a thick solid line) is arranged to cover the light source 66, so as to have the effect of shielding or inhibiting light leakage.
In addition, in the fourth embodiment, the light source 66 is electrically fixed on the light source circuit board 68, and the operation of the light source 66 is controlled through the light source circuit board 68. The light source circuit board 68 is disposed below the bottom plate 52, and the light source 66 is disposed above the light source circuit board 68. In practical applications, the light source 66 may also be located below the light source circuit board 68, as shown by the dashed box. In addition, the two light sources 66 are disposed at two opposite sides of the second support structure 60, which is helpful for making the backlight uniform, but not limited to this in practical application; for example, more or fewer light sources 66 may be used to provide light. For another example, the light source 66 is disposed below the second support structure 60. In addition, in practical applications, when the light source 66 is located below the light source circuit board 68 and the light source circuit board 68 is opaque, the light shielding region 54a may be omitted. In practical applications, the light source 66 may be electrically fixed to the thin film circuit board 54 (e.g. electrically fixed to the circuit on the upper layer of the three-layer structure), and the light source circuit board 68 may be omitted.
In addition, in the fourth embodiment, the fingerprint recognition element 62 is fixed on another circuit board 70, and the operation of the fingerprint recognition element 62 is controlled by the circuit board 70. The fingerprint recognition element 62 is disposed on the second support structure 60 via the circuit board 70. The circuit board 70 may be made of a light-transmissive material to allow light to pass through. In terms of structural logic, the combination of the second key cap 64, the fingerprint recognition element 62, the circuit board 70, the second support structure 60, the light source circuit board 68 and the light source 66 can be regarded as a luminous fingerprint recognition key, and the electrical connection between the circuit board 70 and the light source circuit board 68 can simplify the external electrical connection structure of the luminous fingerprint recognition key.
In summary, the light-emitting fingerprint identification key and the keyboard with the light-emitting fingerprint identification key according to the embodiments of the present invention are designed in the light-emitting fingerprint identification key, so that the backlight can directly pass through the keycap to directly display the light-transmitting pattern on the keycap, thereby facilitating the user to accurately find the position of the light-emitting fingerprint identification key.
Of course, the present invention is capable of other various embodiments and its several details are capable of modification and variation in light of the present invention by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (11)
1. A luminescent fingerprint identification key, comprising:
the key cap is of a multi-layer structure, the multi-layer structure comprises a light-transmitting carrier layer and a light-shielding layer, and the light-shielding layer is provided with a light-transmitting pattern;
a light guide sheet overlapped under the key cap;
the fingerprint identification element is overlapped below the light guide plate; and
the light source is arranged below the keycap, and light rays emitted by the light source enter the light guide sheet to provide backlight for the keycap.
2. The illuminated fingerprint sensor of claim 1, wherein the multi-layer structure further comprises a translucent layer between the light transmissive carrier layer and the light shielding layer.
3. The illuminated fingerprint identification key of claim 1, wherein the light transmissive pattern is located directly above the sensing surface of the fingerprint identification element.
4. A luminescent fingerprint identification key, comprising:
a key cap, the key cap being light-transmissive;
a light guide sheet overlapped under the key cap;
a reflection sheet which is overlapped under the light guide sheet and has a display pattern;
a fingerprint identification element which is overlapped under the reflecting sheet; and
the light source is overlapped below the keycap, and the light emitted by the light source enters the light guide plate and is reflected by the reflecting plate to be emitted to the keycap.
5. The illuminated fingerprint sensor key of claim 4, wherein the display pattern is directly above the sensing surface of the fingerprint sensor.
6. The illuminated fingerprint sensor key according to any one of claims 1 to 5, wherein the light source is disposed towards a side of the light guide sheet such that light emitted by the light source enters the light guide sheet from the side.
7. The illuminated fingerprint sensor key according to any one of claims 1-5, further comprising a circuit board, wherein the fingerprint sensor and the light source are electrically fixed to the circuit board.
8. A keyboard comprising a plurality of keys, wherein one of the plurality of keys is a luminescent fingerprint recognition key according to any one of claims 1 to 5.
9. A keyboard, comprising:
a bottom plate;
the thin film circuit board is arranged on the bottom plate, can transmit light and comprises a plurality of switches;
the first keycaps are arranged on the thin film circuit board corresponding to the switches;
the first support structures are correspondingly connected between the first keycaps and the bottom plate;
the second supporting structure is arranged on the bottom plate;
the fingerprint identification element is overlapped on the second supporting structure;
the second keycap covers the fingerprint identification element and is provided with a light-transmitting pattern; and
the light source is arranged below the thin film circuit board adjacent to the second supporting structure, and light rays emitted by the light source are guided by the second supporting structure to provide backlight for the second keycap.
10. The keyboard of claim 9, wherein the thin film circuit board has a light shielding area that covers the light source.
11. The keyboard of claim 9, further comprising a light source circuit board disposed below the thin film circuit board, wherein the light source is electrically fixed to and below the light source circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210470377.8A CN117012572A (en) | 2022-04-28 | 2022-04-28 | Luminous fingerprint identification key and keyboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210470377.8A CN117012572A (en) | 2022-04-28 | 2022-04-28 | Luminous fingerprint identification key and keyboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117012572A true CN117012572A (en) | 2023-11-07 |
Family
ID=88560575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210470377.8A Pending CN117012572A (en) | 2022-04-28 | 2022-04-28 | Luminous fingerprint identification key and keyboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117012572A (en) |
-
2022
- 2022-04-28 CN CN202210470377.8A patent/CN117012572A/en active Pending
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