[0017] The present invention will now be described in detail in conjunction with drawings and texts. In the following description, in order to make the present invention more thoroughly understood, several specific details will be set forth. However, it is obvious to those skilled in the art that the present invention can be implemented without some or all of these specific details. In some instances, well-known process steps have not been described in excessive detail in order to avoid unnecessarily obscuring the present invention.
[0018] A preferred embodiment of the present invention discloses a handheld device with pressure-sensitive control characteristics and a side key control method. During standby, call or other processes of the handheld device, the side keys of the handheld device are used to control, such as call volume control, system switch control and Various application software startup and shutdown and other related functions.
[0019] like figure 1 and figure 2 As shown, the hand-held device having the method for realizing the side key control of the hand-held device of the present invention generally defines the following components: an output device, an input device, a printed circuit board 3, a controller (not shown), a casing 4, and a side frame 5; The output device includes a display screen 1 and a speaker (not shown), and the input device includes buttons 2 and variable resistance layers 6 positioned on both sides of the handheld device; The variable resistance layer 6 can be made of any material whose resistance characteristics can be changed according to the magnitude of the pressure pressed thereon. The variable resistance layer 6 is usually designed in a strip shape according to the shape of the side of the handheld device. The strip type variable resistance layer 6 is divided into several units, and each unit is connected to the printed circuit board 3 and the controller. connected, and can be set through software, independently or cooperatively to control the corresponding functions of the handheld device through pressure sensing. The control process is as follows: Figure 9 shown.
[0020] see Figure 10 As shown, in a preferred embodiment of the side key control function of the handheld device of the present invention, when the handheld device is playing MP3, talking or conducting a video conference, it needs to adjust the volume of the sound. On the handheld device of the present invention, the output device The variable resistance layers 6 on both sides of the 1 can be used to control the volume adjustment function. The method is as follows: Talk on the handheld device (such as image 3 and Figure 4 shown) or play MP3 (such as Figure 5 During the process, the user simultaneously presses the side frame 5 located on both sides of the handheld device, since the side frame 5 is in close contact with the variable resistance layer 6 and is insulated from each other, when the pressure on the side frame 5 is transmitted to the variable resistance layer 6 When the pressure changes, the resistance characteristics of the variable resistance layer 6 will change with the change of the pressure. The general corresponding rule is that when the pressure decreases, the resistance value of the variable resistance layer 6 increases, and the current flowing on it increases. When the pressure increases, the resistance value of the variable resistance layer 6 decreases, and the current flowing on it increases compared with the initial current. At the same time, the controller analyzes and judges the current signal transmitted from the variable resistance layer 6 through the control circuit, and controls the judgment result of the current signal with the corresponding function, that is, when it is judged that the current signal is smaller than the initial current, Issue an instruction to increase the volume; when it is determined that the current signal increases, issue an instruction to decrease the volume; and output the corresponding instruction through the output device, for example, the display screen of the handheld device shows that the volume graph gradually decreases, and the volume of the speaker also corresponds to slowing shrieking. It should be pointed out that the initial current is defined as the current value at the moment before the determined moment.
[0021] The above method controls the increase and decrease of the volume by pressing the variable resistance layer 6 on both sides of the handheld device at the same time. When the user does not need to continue to increase the volume or reduce the volume, it can be released and applied on the variable resistance layer 6. When the speed at which the user releases the pressure makes the pressure on the variable resistance layer 6 drop from the current pressure value to a pressure threshold (such as 0 Newton) within 0.3 seconds, the magnitude of the current signal generated by the variable resistance layer 6 will also be At the same time, it will drop from the current value to a current signal threshold. The change is analyzed and determined by the controller, so that the volume of the handheld device is automatically maintained at the value immediately before the pressure release; of course, the pressure release speed is not limited to 0.3 seconds. , which can be set at the factory according to the user's usage habits. In the above-mentioned preferred embodiment, if the user only presses the variable resistance layer 6 on one side when the handheld device is playing MP3 or talking, the volume of the handheld device will automatically return to a default value.
[0022] In another preferred embodiment of the function controlled by the side keys of the handheld device of the present invention, when the handheld device is in a closed state, the user simultaneously presses the variable resistance layers 6 on both sides of the handheld device, and the pressing force reaches or exceeds the limit of the handheld device. At a certain specific threshold set, the resistance value of the variable resistance layer 6 and the corresponding value of the current signal in the control circuit will also reach or exceed the resistance threshold and current signal threshold corresponding to the pressure threshold. The magnitude of the current signal in the circuit is determined, and if the current signal threshold is exceeded, the handheld device is automatically turned on. Similarly, if the handheld device is in the standby state, the user simultaneously presses the variable resistance layers 6 on both sides of the handheld device, and the pressing force reaches the pressure threshold set by the handheld device, and the handheld device enters the sleep state.
[0023] In another preferred embodiment of the functions controlled by the buttons on the side of the handheld device of the present invention, the variable resistance layers 6 on both sides of the handheld device can be divided into several units for controlling different functions, and each unit is connected to the controller Carry out the transmission of the current signal. A certain unit on one side of the handheld device (for example, the unit closest to the top of the handheld device) is defined as a function confirmation unit, and each unit on the other side is correspondingly defined as a function selection unit. The function selection units are mainly defined differently. For example, there are three function selection units on one side of a handheld device, the first unit is defined as the camera function, the second unit is defined as the mp3 player function, and the third unit is defined as the Internet connection function; Image 6 As shown, when the user activates the camera function, he needs to press the first unit corresponding to the camera function with a certain force, and also needs to press the function confirmation unit defined on the other side of the handheld device with a certain force. When the pressure on both sides reaches a certain After the pressure threshold, the resistance characteristics of the function determination unit and the first unit change, so that the corresponding current signal value also changes, reaching a certain current signal threshold, and the controller analyzes the current from the function determination unit and the first unit respectively. After the signal is received, an instruction to activate the camera function is issued; the camera function can be activated only when the first unit and the function confirmation unit have pressure applied by the user at the same time and reach the pressure threshold. Similarly, when the mp3 player needs to be started, the user presses the second unit with a certain force with a finger, and at the same time, the function confirmation unit needs to be pressed, and the mp3 playback function can be started by pressing the two units at the same time. This operation method is also applicable to enabling other functions on the handheld device.
[0024] In another preferred embodiment of the functions controlled by the side keys of the handheld device of the present invention, please refer to Figure 7 and Figure 8As shown in the figure, when using the handheld device, some users are accustomed to the left-hand operation, and some are used to the right-hand operation. As described in the previous embodiment, the unit of the side key of the handheld device of the present invention can be set according to different user habits. The side on which the unit is located. It should be further explained that, two sides of the handheld device of the present invention can define multiple units. If the user is accustomed to operating with the right hand, for the convenience of the user, the function confirmation unit can be defined on the right side of the handheld device, and the function selection unit can be defined on the left side of the handheld device; if the user is accustomed to operating with the left hand, the function confirmation unit can be defined Elements are defined on the left side of the handheld device, and function selection elements can be defined on the right side of the handheld device.
[0025] The technical content and technical features of the present invention have been disclosed as above, however, those skilled in the art may still make various substitutions and modifications based on the teachings and disclosures of the present invention without departing from the spirit of the present invention. Therefore, the protection scope of the present invention should not be limited to the contents disclosed in the embodiments, but includes various replacements and modifications without departing from the present invention, which are covered by the claims of the present patent application.
