Patent Application
20080032737
The above and further advantages of this invention may be better understood by referring to the following description, taken in conjunction with the accompanying drawings, in which:
The drawings will be described further in connection with the following detailed description of the present invention.
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The power management module 180 connects with the battery 182 to supply power to the wireless presentation apparatus 1. The laser indicator 16 connects with the power management module 180 via the button switch 15 that controls the power management module 180 to supply power to the laser indicator 16 for further emitting a laser beam. The storage unit 184 stores application programs. The processing chip 186 connects with the power management module 180, the storage unit 184 and the wireless receiver/transmitter 185, and controls the movement of a cursor and the receiving or transmission of a voice and outputs an audio control signal.
Referring to
When connecting with the remote electrical device (not shown) via the wireless receiver/transmitter 185, the processing chip 186 remotely controls the movement of the cursor on a computer monitor, receives messages and transmits reply messages, wherein the electrical device is a computer, and the wireless receiver/transmitter 185 is a Bluetooth wireless receiver/transmitter. When connecting with the amplifier 188, the processing chip 186 controls the amplifier 188 via an audio control signal S1 to output an amplified audio signal S2 that is produced by the processing chip 186 executing the application programs or controlling the receiving/transmission audio signals.
Referring to
When connecting with the socket 17 via the detection circuit 11, the processing chip 186 determines the type of plug plugged into the socket 17 utilizing the detection circuit 11 and transmits the amplified audio signal S2 to the socket 17 utilizing the amplifier 188 for further outputting the amplified audio signal S2 from the plug. In this case, the plug is an earphone plug, a megaphone plug or a communication plug, wherein the communication plug is an earphone or a microphone plug. All the earphone plugs and the communication plugs output stereophonic signals, and the megaphone plug outputs monophonic signals.
When the socket 17 does not connect with the plug, the diode D17 turns the transistor Q10 ON via the voltage between the resistance R46 and R49. After the transistor Q10 is turned ON, the detection circuit 11 outputs a high potential to the pin, AIO-0, of the processing chip 186 for further determining whether any plug has been plugged into the socket 17. If an earphone plug has been plugged into the socket 17, and the resistance R77 is grounded, the diode D17 will cut off the transistor Q10 via the voltage between the resistance R46 and R49. After cutting off the transistor Q10, the detection circuit 11 outputs a low potential to the pin, AIO-0, and the processing chip 186 for further determining whether any earphone plugs have been plugged into the socket 17. Similarly, the detection circuit 11 determines whether any megaphone plug or communication plug has been plugged into the socket 17.
In
Moreover, the wireless presentation apparatus 1 further includes a vibration motor 189, an LED pilot lamp 187, and a mouse 13. The vibration motor 189 connects with the processing chip 186 and is controlled by the same for further substituting ring sounds. The LED pilot lamp 187 and the mouse 13 also connect with the processing chip 186. Users can input a cursor instruction to the processing chip 186 via the mouse 13 for further controlling the movement of the cursor on the screen of the remote computer 9 and receive reminders from the LED pilot lamp 187.
Hence, the wireless presentation apparatus 1 operates in the supply of a No. 4 battery.
An advantage of the present invention is the lowering of the operation current and the current leakage based on MOS transistors. The previous control device was designed to switch via bipolar transistors. Because the bias resistances of the bipolar transistors are about K ohm, the current depletion that occurs while the bipolar transistors are ON is more than 10 mA, and the current leakage that occurs while the bipolar transistors are OFF is more than 10 uA. However, because the bias resistances of the MOS transistors are about M ohm, the current depletion that occurs while the MOS transistors are ON is more than 10 uA, and the current leakage that occurs while the MOS transistors are OFF is more than 10 nA.
Another advantage of the present invention is the increasing of the operation voltage VDD based on the drain switch Q23, the capacitance C23, the resistance R26, and the diode D21. The previous control device stops one of the discharging paths of the capacitance C13 via the diode D11, so that the operation voltage VDD of the controller 14 is 0.4˜0.9 V less than the voltage of the battery 10 under −40˜125□. This decreases the operating life of products. However, the operation voltage VDD that the present invention provides to the controller 24 is similar to the voltage of the battery 20 under −40˜125□. This doesn't decrease the operating life of the products.
Another advantage of the present invention is the controlling of the discharging time of the capacitances for further ensuring that the self-holding circuit is turned OFF based on any load and any temperature. The previous control device discharges from the capacitance C13 into the controller 14, and the discharging time is controlled by the load of the controller 14. Designers cannot control the discharging time. If the load of the controller 14 is too large, the self-holding circuit will be not turn OFF or maintain the voltage utilizing a high power capacitance (which is not shown). However, the present invention discharges from the capacitance C23 into the resistance R26 and controls the discharging time based on the product of the capacitance C23 and the resistance R26. Thus, designers can control the discharging time based on the product of the capacitance C23 and the resistance R26 without the load and the high power capacitance.
Although the present invention has been described with reference to the preferred embodiment thereof, it will be understood that the invention is not limited to the details thereof. Various substitutions and modifications have been suggested in the foregoing description, and others will occur to those of ordinary skill in the art. Therefore, all such substitutions and modifications are intended to be embraced within the scope of the invention as defined in the appended claims.
