Patent Application
20160147315
The subject matter herein generally relates to a hand-held computer interface with a heating circuit therein.
Some hand-held computer interfaces, such as computer mouses, a heated computer mouse pad or computer mouse sheath is generally used to prevent a cold feeling when users touch a computer mouse in winter.
Implementations of the present technology will now be described, by way of example only, with reference to the attached figures.
It will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiments described herein can be practiced without these specific details. In other instances, methods, procedures and components have not been described in detail so as not to obscure the related relevant feature being described. Also, the description is not to be considered as limiting the scope of the embodiments described herein. The drawings are not necessarily to scale and the proportions of certain parts may be exaggerated to better illustrate details and features of the present disclosure.
Several definitions that apply throughout this disclosure will now be presented.
The term “coupled” is defined as connected, whether directly or indirectly through intervening components, and is not necessarily limited to physical connections. The connection can be such that the objects are permanently connected or releasably connected. The term “comprising,” when utilized, means “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in the so-described combination, group, series and the like.
The heating circuit 300 can include a control unit 10, a switch unit 20, and a heating unit 30.
The power pin 6 is configured to receive a +5V operation voltage. In at least one embodiment, the operation voltage is from a power port of a USB connector of the computer mouse. The power port receives an output voltage output from a motherboard of an electronic device. The computer mouse can be coupled to the electronic device via the USB connector. The control unit 10 is coupled to the USB connector via a USB bus.
The control pin 1 is coupled to the switch unit 20. The switch unit 20 is configured to switch the heating unit 30 on/off. The switch unit 20 can include an off port 21, a low temperature port 22, a middle temperature port 23, and a high temperature port 25. When the switch unit 20 switches on the low temperature port 22 or the middle temperature port 23 or the high temperature port 25, the heating unit 30 is switched on. When the switch unit 20 switches on the off port 21, the heating unit 30 is switched off. In at least one embodiment, the switch unit 20 is a paddle switch.
The heating unit 30 can include a first heating resistor R1, a second heating resistor R2, a third heating resistor R3, a first field-effect tube (FET) Q1, a second FET Q2, and a third FET Q3.
A first port of the first resistor R1 is grounded, a second port of the first resistor R1 is coupled to the drain electrode D of the first FET Q1. The grid electrode G of the first FET Q1 is coupled to the first output pin 2. The source electrode S of the first FET Q1 is coupled to the power port.
A first port of the second resistor R2 is grounded, a second port of the second resistor R2 is coupled to the drain electrode D of the second FET Q2. The grid electrode G of the second FET Q2 is coupled to the second output pin 3. The source electrode S of the second FET Q2 is coupled to the power port.
A first port of the third resistor R3 is grounded, a second port of the third resistor R3 is coupled to the drain electrode D of the third FET Q3. The grid electrode G of the third FET Q3 is coupled to the third output pin 5. The source electrode S of the third FET Q3 is coupled to the power port.
When the switch unit 20 switches on the low temperature port 22, the control pin 1 sends out a control signal to control the first output pin 2 to output a high level voltage, and the second output pin 3 and the third output pin 5 outputs a low level voltage. Thus, the first FET Q1 is switched on, and the second FET Q2 and the third FET Q3 are switched off. The first heating resistor R1 is operated to generate heat in the computer mouse, enabling a palm touching the computer mouse to feel warm.
When the switch unit 20 switches on the middle temperature port 23, the control pin 1 sends out a control signal to control the first output pin 2 and the second output pin 3 to output a high level voltage, and the third output pin 5 outputs a low level voltage. Thus, the first FET Q1 and the second FET Q2 are switched on, and the third FET Q3 is switched off. The first heating resistor R1 and the second heating resistor R2 are operated to generate heat in the computer mouse. In this position, the first resistor R1 is coupled to the second resistor R2 in parallel, a total resistance R0 is smaller than R1, according to the power formula P=U2/R, a heating power is greater than that when the switch unit 20 switches on the low temperature port 21.
When the switch unit 20 switches on the high temperature port 25, the control pin 1 sends out a control signal to control the first output pin 2, the second output pin 3, and the third output pin 5 to output a high level voltage. Thus, the first FET Q1, the second FET Q2, and the third FET Q3 are switched on. The first heating resistor R1, the second heating resistor R2, and the third heating resistor R3 are operated to generate heat in the computer mouse. In this position, the first resistor R1, the second resistor R2, and the third resistor R3 are coupled to each other in parallel, a total resistance is smaller than R0, according to the power formula P=U2/R, a heating power is greater than that when the switch unit 20 switches on the middle temperature port 23.
When the switch unit 20 switches on the off port 21, the control pin 1 sends out a control signal to control the first output pin 2, the second output pin 3, and the third output pin 5 to output a low level voltage. Thus, the first FET Q1, the second FET Q2, and the third FET Q3 are switched off. The first heating resistor R1, the second heating resistor R2, and the third heating resistor R3 are not operated to generate heat in the computer mouse.
The embodiments shown and described above are only examples. Many details are often found in the art such as the other features of a hand-held computer interface and a heating circuit. Therefore, many such details are neither shown nor described. Even though numerous characteristics and advantages of the present technology have been set forth in the foregoing description, together with details of the structure and function of the present disclosure, the disclosure is illustrative only, and changes may be made in the detail, including in matters of shape, size and arrangement of the parts within the principles of the present disclosure up to, and including the full extent established by the broad general meaning of the terms used in the claims. It will therefore be appreciated that the embodiments described above may be modified within the scope of the claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201410703344.9 | Nov 2014 | CN | national |
