TW202343500A - Illuminated fingerprint identification key and kyeboard - Google Patents

Abstract

A structure for providing backlight to a fingerprint identification key uses a light source to provide backlight to a keycap of the fingerprint identification key, so as to produce an optical indication effect. A fingerprint identification key of an embodiment has a keycap that is a multi-layer structure having a masking layer by which light passing through the keycap can present a light-transmitting pattern of the masking layer. A fingerprint identification key of another embodiment has a reflection sheet under a light-transmissive keycap thereof. Light reflected by the reflection sheet can present a display pattern formed on the reflection sheet. A keyboard of another embodiment includes any of the above fingerprint identification keys. A keyboard of another embodiment includes a fingerprint identification key, whose light source is disposed under a membrane of the keyboard. Light emitted from the light source can be guided by a supporting structure of the fingerprint identification key to provide backlight to a keycap of the fingerprint identification key.

Description

Luminous fingerprint recognition keys and keyboard

The present invention relates to a fingerprint identification key, in particular to a fingerprint identification key with a backlight and a keyboard with the fingerprint identification key.

With the development of fingerprint recognition technology, fingerprint recognition devices can be integrated into various electronic devices, such as keyboards, mobile devices, etc., to increase security applications. The keycaps of fingerprint recognition keys generally only have printed illustrations. When it is used in an environment with insufficient light, it is difficult for users to find the location of the fingerprint recognition key, which causes inconvenience in use. In addition, if the fingerprint recognition key is integrated into a keyboard with backlight, limited by the setting of the recognition unit, the backlight usually only overflows from around the keycap of the fingerprint recognition key, and there is still no backlight passing through the keycap itself. If there are icons, they still need to be illuminated by ambient light, so the optical indication effect provided by the backlight structure is limited.

In view of the problems in the prior art, one object of the present invention is to provide a luminous fingerprint identification key, the keycap of which is a multi-layer structure. When light passes through the multilayer structure, patterns are revealed.

A luminous fingerprint identification key according to the present invention includes a keycap, a light guide sheet, a fingerprint identification element and a light source. The keycap is a multi-layer structure. The multi-layer structure includes a light-transmitting carrier layer and a light-shielding layer. The light-shielding layer has a light-transmitting pattern. The light guide sheet is stacked under the keycap. The fingerprint identification element is stacked under the light guide sheet. The light source is arranged below the keycap. The light emitted by the light source enters the light guide sheet to provide backlight for the keycap, thereby displaying the light-transmitting pattern. Thereby, in the luminous fingerprint identification key, the backlight can directly pass through the keycap to directly display the light-transmitting pattern on the keycap, making it convenient for the user to accurately find the position of the luminous fingerprint identification key.

Another object of the present invention is to provide a luminous fingerprint identification key, which has a light-transmissive keycap, and a light guide sheet and a reflective sheet are provided below the keycap. The light in the light guide sheet can reflect the pattern on the reflective sheet.

A luminous fingerprint identification key according to the present invention includes a keycap, a light guide sheet, a reflective sheet, a fingerprint identification element and a light source. The keycaps are light-transmissive. The light guide sheet is stacked under the keycap. The reflective sheet is stacked below the light guide sheet, and the reflective sheet has a display pattern. The fingerprint identification element is stacked under the reflective sheet. The light source is arranged below the keycap, and the light emitted by the light source enters the light guide sheet, is reflected by the reflective sheet, and is directed to the keycap. Thereby, in the luminous fingerprint identification key, the light can reflect the display pattern on the key cap, making it convenient for the user to accurately find the position of the luminous fingerprint identification key.

Another object of the present invention is to provide a keyboard that includes a plurality of keys and any of the aforementioned luminous fingerprint identification keys, so that the light-transmitting pattern or the display pattern can be displayed on the keycap of the luminous fingerprint identification key, making it convenient to use. to accurately find the location of the luminous fingerprint recognition key.

Another object of the present invention is to provide a keyboard in which the light source is disposed below the film circuit board, and the light emitted is guided through the support structure of the corresponding fingerprint recognition element to provide backlight for the corresponding keycap to display on the keycap. pattern.

A keyboard according to the present invention includes a base plate, a thin film circuit board, a plurality of first keycaps, a plurality of first supporting structures, a second supporting structure, a fingerprint identification element, a second keycap and a light source. The thin film circuit board is disposed on the base plate. The thin film circuit board is light-transmissive and includes a plurality of switches. The plurality of first keycaps are disposed on the film circuit board corresponding to the plurality of switches. The plurality of first support structures are correspondingly connected between the plurality of first keycaps and the base plate. The second support structure is disposed on the bottom plate. The fingerprint identification element is stacked on the second support structure. The second keycap covers the fingerprint identification element, and the second keycap has a light-transmitting pattern. The light source is disposed under the thin film circuit board adjacent to the second support structure, and the light emitted by the light source is guided through the second support structure to provide backlight for the second keycap. Thereby, in the keyboard, the backlight guided by the second support structure can directly pass through the keycap, so as to directly display the light-transmitting pattern on the keycap, making it convenient for the user to accurately find the luminous fingerprint. Identify the location of the key.

The advantages and spirit of the present invention can be further understood through the following detailed description of the invention and the accompanying drawings.

Please refer to Figures 1 and 2 (in order to facilitate the representation of light paths, hatching lines are not shown in the cross-sections). According to a first embodiment, a luminous fingerprint identification key 1 includes a keycap 10, a light guide sheet 12, a fingerprint identification 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 below the keycap 10 . The fingerprint identification element 14 is stacked below the light guide sheet 12 . A light source 16 (such as but not limited to a light emitting diode) is disposed below the keycap 10 . The fingerprint identification element 14 and the light source 16 are electrically fixed on the circuit board 18 , and the operations of the fingerprint identification element 14 and the light source 16 are controlled through the circuit board 18 . The light emitted by the light source 16 (indicated by an arrow in Figure 2 ) enters the light guide sheet 12 through the side surface 124 of the light guide sheet 12 , and exits the light guide sheet 12 through the light exit surface 122 of the light guide sheet 12 to provide light to the keycap 10 . Backlight. The circuit board 18 has a connection interface 182 (such as a connector or a gold finger) for external communication connection to receive power (and control signals, etc.).

In the first embodiment, the keycap 10 is a multi-layer structure, which includes a light-transmitting carrier layer 102 and a light-shielding layer 104. The light-shielding layer 104 has a light-transmitting pattern 104a (shown as a dotted frame in Figure 2; In Figure 1, for example but not limited to, a fingerprint pattern is used to represent the pattern displayed when light passes through the keycap 10). The light-transmitting carrier layer 102 may be, but is not limited to, transparent, and its material may be, but is not limited to, polycarbonate (PC) or glass. The light-shielding layer 104 can be formed on the light-transmitting carrier layer 102 through printing or other methods. In addition to serving as a carrier substrate for the light-shielding layer 104, the light-transmitting carrier layer 102 also serves as a protective cover for the light-transmitting pattern 104a. In practice, the light-shielding layer 104 can also be disposed above the light-transmitting carrier layer 102, and other materials can be used to cover the light-transmitting pattern 104a for protection. When the backlight passes through the keycap 10 , the light-transmitting pattern 104 a can be seen by the user as an optical indication icon.

In practice, the multi-layer structure of the keycap 10 can include more layer structures according to design requirements. As shown in Figure 3 (for convenience of comparison with Figure 2, the cross-section is not shown with a hatch line), it is a variation of the keycap 10, that is, the keycap 10'. Compared with the keycap 10 in Figure 2, the keycap 10' also includes a light-transmitting coating 106 and a semi-transparent layer 108. The light-transmitting coating 106 is located between the light-transmitting carrier layer 102 and the light-shielding layer 104 . The light-transmitting coating 106 has a light-transmitting effect, and its color can be similar to the appearance color of the device on which the luminous fingerprint identification key 1 is installed; for example, if the luminous fingerprint identification key 1 is installed on a notebook computer (for example, integrated into the arrangement of keyboard keys) (middle), the color of the light-transmitting coating 106 can be close to the color of the shell adjacent to the keyboard, or the color of the key caps of other keys. This can improve the overall appearance (such as the entire keyboard) to have a more consistent color. The translucent layer 108 is located between the light-transmitting coating 106 and the light-shielding layer 104 . The translucent layer 108 also has a light-transmitting effect; for example, the translucent layer 108 can be slightly gray and can be used to adjust the intensity of light emitted from the keycap 10'. In practice, the number of added layers and their materials are determined by actual design requirements and are not limited to the previous example.

Also, please go back to pictures 1 and 2. In the first embodiment, the light-transmitting pattern 104a is located directly above the sensing surface 14a of the fingerprint identification element 14 (toward the keycap 10), so that the user can intuitively, quickly and accurately find out the location of the sensing surface 14a. location to effectively implement fingerprint recognition. Through the guidance of the light guide sheet 12, the light emitted by the light source 16 can still effectively provide sufficient backlight for the light-transmitting pattern 104a. The light source 16 is disposed toward the side 124 of the light guide 12 so that the light emitted by the light source 16 enters the light guide 12 from the side 124 . The two light sources 16 are disposed oppositely on both sides of the light guide sheet 12 to help make the backlight uniform, but the implementation is not limited thereto; for example, more or less light sources 16 can be used to provide light. In addition, for example, using a single light source with a reflective structure (for example, coating the side of the light guide sheet 12 with reflective material) can also improve the backlight uniformity. In addition, in practice, the fingerprint identification element 14 may be a fingerprint identification element that is not affected by the light generated by the light source 16 , such as but not limited to a fingerprint identification element using a capacitive sensor.

In addition, in the first embodiment, the keycap 10 , the light guide sheet 12 , the fingerprint identification element 14 , the light source 16 and the circuit board 18 are designed to be fixedly arranged, but the implementation is not limited to this. For example, in actual application (please also refer to Figure 4; for the convenience of comparison with Figure 2, the section line is not shown), the luminous fingerprint recognition key 1 can further include a base plate 20 (simply shown as a flat plate section in 4) and a support structure 22 (simply shown as a block in Figure 4), the support structure 22 is provided on the base plate 2, and the circuit board 18 is provided on the support structure 22. The support structure 22 can provide the circuit board 18 (together with the light guide sheet 12 and the keycap 10) to move up and down. For example, the support structure 22 may include a scissor leg bracket 220 (simple geometric figure shown in dotted lines in Figure 4) and a carrier plate 222 (simple planar cross-section shown in dotted lines in Figure 4), The scissor leg bracket 220 is connected between the base plate 20 and the carrier plate 222, and the circuit board 18 is disposed on the carrier plate 222; however, the implementation is not limited to this. In practice, the fingerprint identification element 14 can be activated after the keycap 10 is pressed; for example, the keycap 10 is pressed to trigger a switch 224 (shown as a dotted line in Figure 4, for example, triggered by the carrier plate 222; Switch 224 is electrically connected to circuit board 18). If the luminous fingerprint recognition key 1 is integrated into the keyboard, the bottom plate 20 must also be structurally integrated with the bottom plate of the keyboard (used to support other keys). In addition, in terms of structure, the entire structure shown in Figure 4 can also be regarded as a luminous fingerprint identification key (that is, including the luminous fingerprint identification key 1, the base plate 20 and the supporting structure 22 in the figure).

See Figure 5. According to a second embodiment, the light-emitting fingerprint identification key 3 has a roughly similar structural logic to the aforementioned light-emitting fingerprint identification key 1. The main difference is that the optical indication icon of the light-emitting fingerprint identification key 1 is generated by the light-transmitting pattern 104a in the keycap 10. , and the optical indication icon of the luminous fingerprint recognition key 3 is generated by a display pattern 33a on a reflective sheet 33 (its position is indicated by a dotted frame in Figure 5). Therefore, the previous relevant descriptions about the luminous fingerprint identification key 1 (and its variations) are applicable here and will not be described again. In the second embodiment, the luminous fingerprint identification key 3 includes a keycap 30 , a light guide sheet 32 , a reflective sheet 33 , a fingerprint identification element 34 , two light sources 36 and a circuit board 38 . The keycap 32 can transmit light. The light guide sheet 32 is stacked below the keycap 30 . The reflective sheet 33 is stacked below the light guide sheet 32 . The fingerprint identification element 34 is stacked under the reflective sheet 33 . The light source 36 is disposed below the keycap 30 . The fingerprint identification element 34 and the light source 36 are electrically fixed on the circuit board 38 , and the operations of the fingerprint identification element 34 and the light source 36 are controlled through the circuit board 38 . The light emitted by the light source 36 (indicated by an arrow in FIG. 5 ) enters the light guide 32 through the side 324 of the light guide 32 , and exits the light guide 32 through the light exit surface 322 of the light guide 32 to provide light to the keycap 30 . Backlight; wherein, the light in the light guide sheet 32 is reflected by the reflective sheet 33 and directed to the keycap 30, and the display pattern 33a can be displayed, which can be seen by the user as an optical indication icon.

In addition, in the second embodiment, the display pattern 33a is located directly above the sensing surface 34a (toward the keycap 30) of the fingerprint identification element 34, so that the user can intuitively, quickly and accurately find the sensing surface 34a. location to effectively implement fingerprint recognition. In addition, the aforementioned arrangements and functions of the light-transmitting coating 106 and the translucent layer 108 in the luminous fingerprint identification key 1 can also be applied to the luminous fingerprint identification key 3 . For example, a light-transmitting coating and a semi-transparent layer are provided between the keycap 30 and the light guide sheet 32 .

In practical applications, the luminous fingerprint recognition keys 1 and 3 can be arranged on a keyboard (such as a single keyboard or a keyboard on a notebook computer). Referring to Figures 6 and 7, a keyboard 4 according to a third embodiment includes a plurality of keys 40a, 40b and a housing 42 accommodating the plurality of keys. One of the plurality of keys 40a and 40b is the luminous fingerprint identification key 40a. For convenience of explanation, the aforementioned luminous fingerprint identification key 1 is taken as an example. The luminous fingerprint identification key 40a follows the component symbol of the luminous fingerprint identification key 1. For other descriptions of the light-emitting fingerprint identification key 40a, please refer to the previous description of the light-emitting fingerprint identification key 1 and its modifications, which will not be described again. When the luminous fingerprint recognition key 40a is arranged in a fixed manner, the top surface of the keycap 10 of the luminous fingerprint recognition key 40a can be designed to be flush with the top surface of the housing 42.

In addition, in the third embodiment, the button 40b is a mechanical button, but the implementation is not limited to this. To simplify the drawing, the support structure 44 of the button 40b is represented by a simple geometric block. In practice, the support structure 44 may be, but is not limited to, a scissor leg bracket. The bottom plate 46 of the keyboard 4 supports both the general keys 40b and the luminous fingerprint recognition keys 40a. In addition to providing the switch function of the general key 40b (the switch 482 is shown as a single block in the figure), the switch circuit board 48 of the keyboard 4 can also be designed to be integrated with the switch in the actual implementation. The circuit board 48 is integrated.

In the aforementioned luminous fingerprint identification keys 1 and 3 (and the luminous fingerprint identification key 40a), the light sources 16 and 36 are arranged adjacent to the circuit boards 18 and 38, and the light emitted by the light sources 16 and 36 can directly enter the light guide sheets 12 and 32 to provide Keycaps 10 and 30 are backlit. However, in practice, the luminous fingerprint recognition key can also be designed so that the light source can be relatively far away from the keycap design. Please refer to Figure 8, which is a partial cross-sectional view of a keyboard 5 according to a fourth embodiment. The appearance of keyboard 5 is similar to keyboard 4 and is not shown separately. The keyboard 5 includes a shell 50 and a bottom plate 52 accommodated in the shell 50 , a thin film circuit board 54 , a plurality of first keycaps 56 , a plurality of first support structures 58 , a second support structure 60 , a Fingerprint identification element 62 , a second keycap 64 and two light sources 66 . The thin film circuit board 54 is actually a three-layer structure, with switch circuits formed on the upper and lower layers, and an insulating layer sandwiched between the upper and lower layers. To simplify the drawing, the thin film circuit board 54 is still shown with a single structure in the figure. middle. 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 in the figure). The plurality of first keycaps 56 are disposed on the film circuit board 52 corresponding to the plurality of switches 542 . The plurality of first support structures 58 are correspondingly connected between the plurality of first keycaps 56 and the bottom plate 52 , so that the first keycaps 56 can move up and down relative to the bottom plate 52 via the corresponding first support structures 58 to make the corresponding switch 542 is triggered. The second support structure 60 is disposed on the bottom plate 52 . The fingerprint identification element 62 is stacked on the second supporting structure 60 . The second keycap 64 covers the fingerprint identification element 62 . The light source 66 is disposed under the thin film circuit board 54 adjacent to the second support structure 60 . The light emitted by the light source 66 is guided through the second support structure 60 to provide backlight for the second keycap 64 .

In the fourth embodiment, the second support structure 60 is made of a light-transmissive material, so the light emitted by the light source 66 can pass through and then be emitted to the second keycap 64 . In addition, due to the light-transmissive nature of the structural material of the second support structure 60, the second support structure 60 also has the effect of guiding light, so that although the light source 66 is not adjacent to the second keycap 64, the light emitted by it can pass through and enter the second keycap 64. The second support structure 60 is in the structure and is guided by the second support structure 60 to emit the light to the second keycap 64; this structure contributes to the utilization of the light emitted by the light source 66. In addition, in practice, the second support structure 60 can be designed to fixedly support the second keycap 64 and the fingerprint identification element 62 , or can be designed to movablely support the second keycap 64 and the fingerprint identification element 62 . Regarding the latter, for example, similar to the structure shown in Figure 2, the second support structure 60 can include a base plate, a carrier plate, and a scissor leg bracket (or other mechanism that can provide lifting) connected between the base plate and the carrier plate. The base plate can be fixed. to the bottom plate 52 of the keyboard 5 (for example, locked or riveted) or the housing 50 , or directly integrally formed with the bottom plate 52 of the keyboard 5 . The fingerprint identification element 62 (together with the second keycap 64) is fixed on the carrier plate, so that the fingerprint identification element 62 (together with the second keycap 64) can move up and down relative to the base plate via the scissor leg bracket. In addition, in practice, a switch can be provided on the base plate, which can be triggered after the second keycap 64 is pressed. Thereby, the action of the fingerprint identification element 62 can be designed to be activated after the switch is triggered. The above-mentioned relevant descriptions about the support structure 22 in Figure 2 are applicable here and will not be described again.

In the fourth embodiment, the second keycap 64 has a light-transmitting pattern 64a (shown as a dotted frame in the figure), so when the backlight can pass through the second keycap 64, the light-transmitting pattern 64a can be used as an optical indicator. The diagram is seen by the user, so that the user can intuitively, quickly and accurately find the position of the sensing surface 62a of the fingerprint identification element 62, so as to effectively perform fingerprint identification. In addition, in practice, the second keycap 64 can adopt a multi-layer structure similar to the keycap 10 mentioned above to form the light-transmitting pattern 64a, but is not limited thereto. For example, the second keycap 64 itself is made of a light-transmitting material, and an opaque layer (such as coating with opaque paint) is provided on the surface of the light-transmitting keycap to form a light-transmitting pattern 64a.

In the fourth embodiment, the light source 66 is located in the escape hole 522 of the bottom plate 52 and below the film circuit board 54. This structural configuration helps to reduce the overall height of the keyboard 5. If the thin film circuit board 54 is light-transmissive (for example, the material of its three-layer structure is light-transmissive), a light-shielding area 54a can be formed on the thin film circuit board 54 (for example, an opaque layer (such as coating) is provided on the upper surface of the thin film circuit board 54 (coated with opaque paint), the distribution range of which is represented by a thick solid line in the figure), covering the light source 66, which has the effect of shielding or suppressing light leakage. In practice, the entire upper surface of the thin film circuit board 54 can also be coated with an opaque layer to increase the shielding effect. In addition, in practice, the opaque layer can also be provided in the thin film circuit board 54, which can also provide an insulation effect at the same time; in addition, the insulating layer of the three-layer structure in the thin film circuit board 54 can be directly made of opaque material. It has both insulation and shading effects.

In addition, in the fourth embodiment, the light source 66 is electrically fixed on a 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 base plate 52 , and the light source 66 is located above the light source circuit board 68 . In practice, the light source 66 can also be located below the light source circuit board 68, as shown in the dotted box in the figure. In addition, the two light sources 66 are disposed oppositely on both sides of the second support structure 60 to help make the backlight uniform, but the implementation is not limited thereto; for example, more or less light sources 66 can be used to provide light. For another example, the light source 66 is disposed below the second support structure 60 . In addition, in practice, when the light source 66 is located below the light source circuit board 68 and the light source circuit board 68 is opaque, the aforementioned light shielding area 54a may be omitted. In addition, in practice, the light source 66 can be electrically fixed on the thin film circuit board 54 (for example, electrically fixed to the circuit on the upper layer of its three-layer structure), and the light source circuit board 68 can also be omitted.

In addition, in the fourth embodiment, the fingerprint identification element 62 is fixed on another circuit board 70 , and the operation of the fingerprint identification element 62 is controlled through the circuit board 70 . The fingerprint identification element 62 is disposed on the second support structure 60 via the circuit board 70 . The circuit board 70 can be made of a light-transmissive material to allow light to pass through. In terms of structural logic, the combination of the second keycap 64, the fingerprint identification element 62, the circuit board 70, the second supporting structure 60, the light source circuit board 68 and the light source 66 can be regarded as a luminous fingerprint identification key, and the circuit board 70 and the light source circuit board 68 electrical connections can simplify the external electrical connection structure of the luminous fingerprint identification key. The above are only preferred embodiments of the present invention, and all equivalent changes and modifications made in accordance with the patentable scope of the present invention shall fall within the scope of the present invention.

1,3: Luminous fingerprint recognition key 10,10',30:keycap 102: Translucent carrier layer 104:Light shielding layer 104a: Translucent pattern 106: Translucent coating 108: Translucent layer 12,32:Light guide sheet 122,322: light-emitting surface 124,324: Side 14,34:Fingerprint identification component 14a,34a: Sensing surface 16,36:Light source 18,38:Circuit board 182:Connection interface 20: Bottom plate 22:Support structure 220: Scissor leg bracket 222: Carrier board 224: switch 33: Reflective sheet 33a: Display pattern 4:Keyboard 42: Shell 40a, 40b: buttons 44:Support structure 46:Base plate 48:Switch circuit board 482:switch 5: Keyboard 50: Shell 52:Base plate 522: Avoidance hole 54:Thin film circuit board 542: switch 56:First keycap 58:First support structure 60: Second support structure 62:Fingerprint identification component 62a: Sensing surface 64:Second keycap 64a: Translucent pattern 66:Light source 68:Light source circuit board 70:Circuit board

Figure 1 is an exploded schematic diagram of a light-emitting fingerprint identification key according to a first embodiment. Figure 2 is a cross-sectional view of the luminous fingerprint identification key in Figure 1. Figure 3 is a cross-sectional view of the keycap in Figure 2 according to an embodiment. Figure 4 is a cross-sectional view of an application example of the luminous fingerprint recognition key. Figure 5 is a cross-sectional view of a light-emitting fingerprint identification key according to a second embodiment. Figure 6 is a schematic diagram of a keyboard according to a third embodiment. Figure 7 is a partial cross-sectional view of the keyboard along line X-X in Figure 6. Figure 8 is a partial cross-sectional view of a keyboard according to a fourth embodiment.

1: Luminous fingerprint recognition key

10:Keycaps

102: Translucent carrier layer

104:Light shielding layer

104a: Translucent pattern

12:Light guide film

122: Shiny surface

124:Side

14:Fingerprint recognition component

14a: Sensing surface

16:Light source

18:Circuit board

Claims (11)

A luminous fingerprint identification key, including: A keycap, the keycap is a multi-layer structure, the multi-layer structure includes a light-transmitting carrier layer and a light-shielding layer, the light-shielding layer has a light-transmitting pattern; A light guide sheet is stacked under the keycap; A fingerprint identification element is stacked under the light guide sheet; and A light source is disposed below the keycap, and the light emitted by the light source enters the light guide sheet to provide backlight for the keycap. The luminous fingerprint identification key of claim 1, wherein the multi-layer structure includes a semi-transparent layer located between the light-transmitting carrier layer and the light-shielding layer. The luminous fingerprint identification key as claimed in claim 1, wherein the light-transmitting pattern is located directly above the sensing surface of the fingerprint identification element. A luminous fingerprint identification key, including: One keycap, the keycap is light-transmissive; A light guide sheet is stacked under the keycap; A reflective sheet is stacked below the light guide sheet, and the reflective sheet has a display pattern; A fingerprint identification element is stacked under the reflective sheet; and A light source is stacked under the keycap, and the light emitted by the light source enters the light guide sheet, is reflected by the reflective sheet, and is directed to the keycap. The luminous fingerprint identification key of claim 4, wherein the display pattern is located directly above the sensing surface of the fingerprint identification element. The luminous fingerprint identification key according to any one of claims 1 to 5, wherein the light source is disposed toward one side of the light guide sheet, so that the light emitted by the light source enters the light guide sheet from the side. The luminescent fingerprint identification key as described in any one of claims 1 to 5 further includes a circuit board, wherein the fingerprint identification element and the light source are electrically fixed on the circuit board. A keyboard includes a plurality of keys, one of which is the luminescent fingerprint recognition key described in any one of claims 1 to 5. A keyboard containing: a base plate; A thin film circuit board is disposed on the base plate. The thin film circuit board is light-transmissive and includes a plurality of switches; A plurality of first keycaps corresponding to the plurality of switches are arranged on the film circuit board; A plurality of first support structures are correspondingly connected between the plurality of first keycaps and the bottom plate; a second support structure provided on the bottom plate; A fingerprint identification element is stacked on the second support structure; a second keycap covering the fingerprint identification element, the second keycap having a light-transmitting pattern; and A light source is disposed under the thin film circuit board adjacent to the second support structure, and the light emitted by the light source is guided through the second support structure to provide backlight for the second keycap. The keyboard of claim 9, wherein the film circuit board has a light-shielding area to cover the light source. The keyboard of claim 9 further includes a light source circuit board disposed below the film circuit board, wherein the light source is electrically fixed on the light source circuit board and is located below the light source circuit board.

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