TWI835603B - Portable computer device and keyboard thereof - Google Patents

Abstract

A portable computer device includes a computer body, a keyboard, a backlight circuit board and a metal layer. The computer body has a wireless transceiver and a system ground terminal. The keyboard is mounted on the computer body. The backlight circuit board is disposed under the keyboard and is electrically connected to the computer body. The backlight circuit board has a plurality of light sources and a circuit trace. The circuit trace is electrically connected to the plurality of light sources. The wireless transceiver is located at a side of the backlight circuit board. The metal layer is formed on a position of the backlight circuit board where there is no circuit trace and is adjacent to the wireless transceiver. The metal layer is electrically connected to the system ground terminal for suppressing electromagnetic interference of the backlight circuit board to the wireless transceiver.

Description

Portable computer device and keyboard thereof

The present invention relates to a portable computer device and its keyboard, and in particular, to a portable computer in which a metal sheet is formed on a backlight circuit board at a position where no circuit traces are arranged to suppress the electromagnetic interference of the backlight circuit board to wireless transceivers. device and its keyboard.

Generally speaking, in order to make the keyboard of a portable computer device (such as a notebook computer, etc.) have a character illumination function, the current common design is to configure a backlight module directly under the keyboard bottom plate. The backlight module includes a light guide plate and a backlight circuit board. The bottom plate of the keyboard is set on the light guide plate and has holes formed in positions corresponding to the plurality of keys on the keyboard. The backlight circuit board has a plurality of backlight sources corresponding to the plurality of keys on the keyboard, and the backlight source can be controlled by a circuit signal. Perform operations such as switching/brightness adjustment, whereby the light guide plate can guide the light emitted by the backlight source to pass through the holes and be incident on the corresponding symbols on the keys to produce a character lighting effect. However, since portable computer devices usually adopt a configuration in which wireless transceivers (such as antennas or radio frequency (RF) devices) are disposed on one side of the backlight module to provide wireless signal transceiver functions, the backlight circuit board It often causes electromagnetic interference (EMI) to the wireless signal transmission and reception of wireless transceivers, thereby affecting the wireless communication quality of portable computer devices.

Therefore, the object of the present invention is to provide a portable computer device and its keyboard in which a metal sheet is formed on a backlight circuit board at a location where no circuit traces are arranged to suppress the electromagnetic interference of the backlight circuit board to the wireless transceiver, so as to solve the problem. the above issues.

According to an embodiment, the portable computer device of the present invention includes a computer body, a keyboard, a backlight circuit board, and a metal sheet. The computer body has a wireless transceiver and a system ground terminal. The keyboard is installed on the computer body. The backlight circuit board is disposed under the keyboard and is electrically connected to the computer body. The backlight circuit board has a plurality of light sources and a circuit trace. The circuit trace is electrically connected to the plurality of light sources, wherein the wireless transceiver is located on the One side of the backlight circuit board. The metal sheet layer is formed on the backlight circuit board at a location where the circuit traces are not arranged and is adjacent to the wireless transceiver. The metal sheet layer is electrically connected to the system ground terminal to prevent the backlight circuit board from causing damage to the system. Electromagnetic interference of wireless transceivers.

According to another embodiment, the keyboard of the present invention is installed on a computer body that has a wireless transceiver and a system ground terminal. The keyboard includes a keyboard base plate, a backlight circuit board, and a metal sheet layer. The backlight circuit board is disposed under the keyboard base and is electrically connected to the computer body. The backlight circuit board has a plurality of light sources and a circuit trace. The circuit trace is electrically connected to the plurality of light sources, wherein the wireless transceiver is located One side of the backlight circuit board. The metal sheet layer is formed on the backlight circuit board at a location where the circuit traces are not arranged and is adjacent to the wireless transceiver. The metal sheet layer is electrically connected to the system ground terminal to prevent the backlight circuit board from causing damage to the system. Electromagnetic interference of wireless transceivers.

To sum up, through the above-mentioned configuration of arranging the metal sheet on the backlight circuit board where no circuit traces are arranged and adjacent to the wireless transceiver, and the grounding design of electrically connecting the metal sheet to the system ground terminal, the metal The sheet system can produce a metal shielding effect on the wireless transceiver to reliably shield the electromagnetic interference signal from the backlight circuit board, thus suppressing the electromagnetic interference of the backlight circuit board to the wireless transceiver. In this way, the present invention can effectively solve the problem mentioned in the prior art that the backlight circuit board will cause electromagnetic interference to the wireless signal transmission and reception of the wireless transceiver, thereby greatly improving the wireless communication quality of the portable computer device.

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

The following content will be combined with drawings to illustrate the technical content of the present invention through specific embodiments. Those familiar with this technology can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various modifications and changes may be made to various details in this description based on different viewpoints and applications without departing from the spirit of the present invention. In particular, the proportional relationship and relative position of each element in the drawings are for exemplary purposes only and do not represent the actual implementation of the present invention.

Please refer to Figure 1, which is a schematic cross-sectional view of a portable computer device 10 according to an embodiment of the present invention. The portable computer device 10 may preferably be composed of an upper cover and a lower casing. Open and close computer equipment or computer equipment with key input functions (such as notebook computers, but not limited to this) and provide character lighting functions. In order to clearly display the metal sheet configuration of the portable computer device 10, the computer body 12 is only shown with a simple frame structure in Figure 1 (but is not limited to this), and the keyboard 14 is simply shown with a configuration of three keys. As shown in FIG. 1 , the portable computer device includes a computer body 12 , a keyboard 14 , a backlight circuit board 16 , and a metal sheet 18 . The computer body 12 has a wireless transceiver 20 (preferably an antenna or radio frequency device, but not limited to this) and a system ground terminal 22 that provides circuit grounding function. As for other components of the computer body 12 (such as the host casing, central processing unit) , hard disk, motherboard, etc.) are commonly seen in the prior art and will not be described again here. The keyboard 14 is installed on the computer body 12 so that the user can press the keys on the keyboard 14 to perform the functions desired by the user. Thin film circuit boards, etc.) have been described in the prior art and will not be repeated here.

The following is a detailed description of the grounding design of the metal sheet layer 18. Please refer to Figures 1 and 2. Figure 2 shows the configuration of the backlight circuit board 16, the metal sheet layer 18 and the wireless transceiver 20 in Figure 1. Top perspective view. As shown in Figures 1 and 2, the backlight circuit board 16 is disposed below the keyboard 14 and is electrically connected to the computer body 12. The backlight circuit board 16 has a plurality of light sources 24 (such as light-emitting diodes, but is not limited to this). ; (not limited to this) and is electrically connected to a plurality of light sources 24, in which the wireless transceiver 20 is located on one side of the backlight circuit board 16 so that the computer body 12 has a wireless signal transceiver function. The metal sheet layer 18 is formed on the backlight circuit board 16 at a position where the circuit traces 26 are not arranged (as shown in Figure 2 ) and is adjacent to the wireless transceiver 20 . The metal sheet layer 18 is electrically connected to the system ground terminal 22 Connection, more specifically, in this embodiment, the metal sheet 18 can form a contact point 28 at the position corresponding to the system ground terminal 22, and as can be seen from Figures 1 and 2, between the keyboard 14 and the backlight circuit board When 16 is installed on the computer body 12, the contact point 28 can directly contact the system ground terminal 22 to complete the electrical connection and grounding between the metal sheet layer 18 and the system ground terminal 22.

Through the above-mentioned configuration of arranging the metal sheet layer 18 on the backlight circuit board 16 where no circuit traces 26 are arranged and adjacent to the wireless transceiver 20 and the grounding design of electrically connecting the metal sheet layer 18 to the system ground terminal 22, The metal sheet layer 18 can produce a metal shielding effect on the wireless transceiver 20 to reliably shield the electromagnetic interference signal from the backlight circuit board 16, thereby suppressing the electromagnetic interference of the backlight circuit board 16 to the wireless transceiver 20. In this way, the present invention can effectively solve the problem mentioned in the prior art that the backlight circuit board causes electromagnetic interference to the wireless signal transmission and reception of the wireless transceiver, thereby greatly improving the wireless communication quality of the portable computer device.

It is worth mentioning that the configuration of the metal sheet layer is not limited to the above embodiment. For example, please refer to Figure 3, which shows a backlight circuit board 16 and a metal sheet layer 18' according to another embodiment of the present invention. As well as a top perspective view of the configuration of the wireless transceiver 20, the components mentioned in this embodiment and the above embodiment have the same numbers, which represent the same or similar structures and functions, and will not be described again. As shown in Figure 3, in embodiments where it is necessary to expand/extend the layout area of the metal sheet to extend the connection to the system ground terminal to be connected or to improve the metal shielding effect, the metal sheet 18' is formed on the backlight The circuit board 16 can have at least one jumper structure 19 (three are shown in Figure 3, but are not limited to this) at locations where circuit traces 26 are not laid out, whereby the metal sheet layer 18' can pass through The jumper structure 19 is insulated across the circuit traces 26 (it can be preferably insulated with UV curing glue, but is not limited to this), thereby preventing the metal sheet layer 18' from contacting the circuit traces 26 and causing a short circuit on the backlight circuit board 16 problem occurs.

In addition, the electrical connection design between the metal sheet layer and the system ground terminal is not limited to the above embodiment. It can also adopt a connector electrical connection design. For example, please refer to Figure 4 and Figure 5, Figure 4. Figure 4 is a schematic cross-sectional view of a portable computer device 100 according to another embodiment of the present invention. Figure 5 is a diagram of the backlight circuit board 16', metal sheet layer 18' and wireless transceiver 20 in Figure 4. In the top perspective view of the configuration, the elements mentioned in this embodiment and the above embodiments have the same numbers, which represent the same or similar structures and functions, and will not be described again here. As shown in Figures 4 and 5, the portable computer device 100 can preferably be a retractable computer device composed of an upper cover and a lower case or a computer device with a key input function (such as a notebook computer, but Not limited to this) and providing a character lighting function, the portable computer device 100 may include a computer body 12, a keyboard 14, a backlight circuit board 16', and a metal sheet layer 18'. The backlight circuit board 16' is provided on the keyboard 14 Below and electrically connected to the computer body 12, the backlight circuit board 16' has a plurality of light sources 24 and circuit traces 26 and has a connector 102 (such as an FPC connector) corresponding to the system ground terminal 22, but is not subject to (this limit), the connector 102 may have a ground trace 103 and be connected to the metal sheet 18' via the jumper structure 19, whereby when the keyboard 14 and the backlight circuit board 16' are installed on the computer body 12, the connector 102 can It can be electrically connected to the system ground terminal 22 to complete the electrical connection and grounding between the metal sheet layer 18' and the system ground terminal 22, thereby generating electromagnetic interference to the wireless transceiver 20 through the metal sheet layer 18' to suppress the backlight circuit board 16'. The effect of interference.

In addition, the present invention can also adopt a design in which the metal sheet is grounded through the keyboard ground terminal. For example, please refer to Figure 6, which is a simplified cross-section of a portable computer device 150 according to another embodiment of the present invention. In the figure, in order to clearly show the metal sheet configuration of the portable computer device 150, the computer body 12 is only shown with a simple frame structure in Figure 6 (but is not limited to this), and the keyboard 152 is only shown with A brief illustration of the configuration of the three buttons. In addition, the components mentioned in this embodiment and the above-mentioned embodiments have the same numbers, which represent the same or similar structures and functions, and will not be repeated here. As shown in Figure 6, the portable computer device 150 can preferably be a retractable computer device composed of an upper cover and a lower case or a computer device with a key input function (such as a notebook computer, but it is not used as a computer device). (limited) and provide character lighting function. The portable computer device 150 may include a computer body 12, a keyboard 152, a backlight circuit board 16, and a metal sheet layer 18. The keyboard 152 is installed on the computer body 12 so that the user can press the keyboard 152. The keys are pressed to perform the functions desired by the user. The relevant descriptions of the common components of the keyboard 152 (such as keyboard bottom plate, keycaps, elastic return parts, film circuit boards, etc.) have been seen in the prior art and will not be repeated here. Repeat. In this embodiment, the keyboard 152 may have a keyboard ground terminal 153 to be electrically connected to the system ground terminal 22 (not shown in Figure 6), and the metal sheet layer 18 may form a contact point 28 at a position corresponding to the keyboard ground terminal 153. Thereby, when the keyboard 152 and the backlight circuit board 16 are installed on the computer body 12, the contact point 28 can directly contact the keyboard ground terminal 153 and complete the metal sheet layer through the electrical connection between the keyboard ground terminal 153 and the system ground terminal 22. The ground connection between the backlight circuit board 18 and the system ground terminal 22 has the effect of suppressing the electromagnetic interference of the backlight circuit board 16 to the wireless transceiver 20 through the metal sheet layer 18 . It should be noted that this embodiment can also selectively adopt the jumper structure design and connector design mentioned in the above embodiment to enhance the design flexibility of the present invention in the metal sheet grounding configuration. As for the related derivative changes Detailed descriptions of embodiments (for example, embodiments in which the backlight circuit board 16 has a connector at a position corresponding to the keyboard ground terminal 153 to electrically connect to the metal sheet layer 18 and the keyboard ground terminal 153) can be deduced by analogy with reference to the above embodiments. This will not be described again. 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.

10, 100, 150: Portable computer device 12:Computer body 14. 152: Keyboard 16, 16’: Backlight circuit board 18, 18’: metal sheet layer 19: Jumper structure 20: Wireless sending and receiving 22: System ground terminal 24:Light source 25: Positive wiring 26:Circuit routing 27: Negative wiring 28: Touch points 102:Connector 103: Ground trace 153: Keyboard ground terminal

Figure 1 is a schematic cross-sectional view of a portable computer device according to an embodiment of the present invention. Figure 2 is a top perspective view of the arrangement of the backlight circuit board, metal sheet layer and wireless transceiver in Figure 1. Figure 3 is a top perspective view of a configuration of a backlight circuit board, a metal sheet layer and a wireless transceiver according to another embodiment of the present invention. Figure 4 is a schematic cross-sectional view of a portable computer device according to another embodiment of the present invention. Figure 5 is a top perspective view of the arrangement of the backlight circuit board, metal sheet layer and wireless transceiver of Figure 4 . Figure 6 is a schematic cross-sectional view of a portable computer device according to another embodiment of the present invention.

10: Portable computer device

12:Computer body

14:Keyboard

16:Backlight circuit board

18:Metal sheet layer

20: Wireless sending and receiving

22: System ground terminal

24:Light source

28: Touch points

Claims (10)

A portable computer device, which includes: a computer body with a wireless transceiver and a system ground terminal; a keyboard installed on the computer body; a backlight circuit board disposed below the keyboard and electrically connected to the Computer body, the backlight circuit board has a plurality of light sources and a circuit trace, the circuit trace is electrically connected to the plurality of light sources, wherein the wireless transceiver is located on one side of the backlight circuit board; and a metal sheet layer, Formed on the backlight circuit board where the circuit traces are not arranged and adjacent to the wireless transceiver, the metal sheet layer is formed under the backlight circuit board or on the backlight circuit board, and the metal sheet layer is connected to the system The ground terminal is electrically connected to suppress electromagnetic interference from the backlight circuit board to the wireless transceiver. The portable computer device as claimed in claim 1, wherein the metal sheet layer forms a contact point corresponding to the position of the system ground terminal, and the contact point is electrically connected to the system ground terminal. The portable computer device as claimed in claim 1, wherein the keyboard has a keyboard ground terminal, the metal sheet layer forms a contact point corresponding to the position of the keyboard ground terminal, and the keyboard ground terminal is electrically connected to the contact point and the System ground. The portable computer device as claimed in claim 1, wherein the backlight circuit board has a connector corresponding to the system ground terminal, the metal sheet is connected to the connector, and the connector is electrically connected to the system ground. end. The portable computer device as claimed in claim 1, wherein the metal sheet layer has at least one Jumper structures insulate traces across this circuit to avoid short circuits. A keyboard installed on a computer body. The computer body has a wireless transceiver and a system ground terminal. The keyboard includes: a keyboard bottom plate; a backlight circuit board, which is arranged below the keyboard bottom plate and is electrically connected to the computer body. , the backlight circuit board has a plurality of light sources and a circuit trace, the circuit trace is electrically connected to the plurality of light sources, wherein the wireless transceiver is located on one side of the backlight circuit board; and a metal sheet layer is formed on The backlight circuit board is located at a location where the circuit traces are not arranged and is adjacent to the wireless transceiver. The metal sheet layer is formed under the backlight circuit board or on the backlight circuit board. The metal sheet layer is connected to the system ground terminal. Electrically connected to suppress the electromagnetic interference of the backlight circuit board to the wireless transceiver. The keyboard of claim 6, wherein the metal sheet layer forms a contact point corresponding to the system ground terminal, and the contact point is electrically connected to the system ground terminal. The keyboard of claim 6, wherein the keyboard has a keyboard ground terminal, the metal sheet layer forms a contact point corresponding to the position of the keyboard ground terminal, and the keyboard ground terminal is electrically connected to the contact point and the system ground terminal. The keyboard of claim 6, wherein the backlight circuit board has a connector at a position corresponding to the system ground terminal, the metal sheet layer is connected to the connector, and the connector is electrically connected to the system ground terminal. The keyboard of claim 6, wherein the metal sheet layer has at least one jumper structure insulating across the circuit trace to avoid short circuit.

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