KR100449629B1 - Optical mouse sensor chip with function of self-wakeup, and optical mouse having the sensor chip - Google Patents

Abstract

The present invention relates to an optical mouse having a sensor chip, and the optical mouse according to the present invention senses a movement according to a control from a mouse control unit 100 that controls the overall operation of the optical mouse, and the movement of the optical mouse. And an optical mouse sensor chip (200) for providing data corresponding to the mouse control unit (100), the sensor chip detecting a clock input from the mouse control unit (100), A clock detection unit 210 which provides an internal clock generation signal S1 and a clock selection signal S2 accordingly; An internal clock generator 220 generating a clock according to the internal clock generation signal S1 of the clock detector 210; According to the clock selection signal S2 of the clock detector 210, a clock that selects and provides one clock from an external clock from the mouse control unit 100 and an internal clock from the internal clock generator 220. According to the present invention having a selection unit 230 and configured as described above, after entering the power mode in the optical mouse, the user can wake up according to the movement without selecting the mouse wake-up button. Can provide sex.

Description

Optical mouse sensor chip with self-wake-up function and optical mouse with the sensor chip {OPTICAL MOUSE SENSOR CHIP WITH FUNCTION OF SELF-WAKEUP, AND OPTICAL MOUSE HAVING THE SENSOR CHIP}

The present invention relates to an optical mouse having a sensor chip, and in particular, after entering the power mode in the optical mouse, it is possible to wake up itself according to the movement without selecting the mouse wake-up button. The present invention relates to an optical mouse sensor chip capable of providing convenience and an optical mouse having the sensor chip.

In general, the principle of an optical mouse performs a function of acquiring an image according to a movement, detecting a movement based on the acquired image, and providing data corresponding to the detected movement to a computer. In such an optical mouse, when the user is not using the mouse, a method for reducing the power consumption of the mouse is required. To support this, if the mouse does not move for a while, it enters a power saving mode. When the user starts to use the mouse, there should be a function to return from the power saving mode to the normal operation mode.

FIG. 1 is a schematic configuration diagram of a conventional optical mouse. Referring to FIG. 1, a conventional optical mouse 10 interfaces with a computer (hereinafter, referred to as a “PC”), and provides a clock for a sensing operation. And a mouse control unit 11 that provides motion data to the PC, and receives the clock from the mouse control unit 11 to operate the sensed data by detecting movement. It consists of a sensor chip (12) provided by (11).

In the conventional optical mouse, since the externally inputted clock is not provided together to reduce the power consumption in the power saving mode to the maximum, the sensing operation cannot be performed in the sensor chip. Wakeup cannot be performed by the movement movement of, and to wake up, a separately installed wakeup button should be selected.

The conventional wakeup method in the optical mouse is a manual method in which a button is to be selected, which has a problem of inconvenience in use, and a sensor chip of the optical mouse cannot wake up.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and therefore, an object of the present invention is to provide an internal clock generator in a sensor chip of an optical mouse and to operate the internal clock generator in a power saving mode. And an optical mouse having the sensor chip.

Another object of the present invention is to provide a user convenience by providing a wake-up itself according to the movement without selecting the mouse wake-up button after entering the power mode in the optical mouse, optical mouse sensor chip And an optical mouse having the sensor chip.

1 is a schematic configuration diagram of a conventional optical mouse.

2 is an overall block diagram of an optical mouse according to the present invention.

3 is a detailed block diagram of the clock detector of FIG. 2.

4 is a flowchart showing an internal clock generation process of the optical mouse according to the present invention.

Explanation of symbols on the main parts of the drawings

100: mouse control unit 200: optical mouse sensor chip

210: clock detector 211: filter unit

212: clock edge detection unit 213: detection frequency counting unit

214: external clock input determination unit 215: internal clock generation / clock selection indicator

220: internal clock generator 230: clock selector

240 sensor unit 250 wake-up signal generation unit

260: signal processing unit

As a technical means for achieving the above object of the present invention, the present invention is to detect the movement in accordance with the control from the mouse control unit for controlling the overall operation of the optical mouse, and the data corresponding to the movement of the mouse control unit An optical mouse sensor chip, comprising: a clock detector for detecting a clock input from the mouse control unit and providing an internal clock generation signal and a clock selection signal depending on whether the clock input is performed; An internal clock generator configured to generate a clock according to an internal clock generation signal of the clock detector; And a clock selector configured to select and provide one clock from an external clock from the mouse control unit and an internal clock from the internal clock generator according to the clock selection signal of the clock detector.

The clock detection unit includes a filter unit to block noise components included in a clock from the mouse control unit; A clock frequency detector for detecting a frequency of the clock through the filter; A comparator comparing the detected value of the clock frequency detector with a preset reference value; And an internal clock supply instruction unit instructing to supply the internal clock according to the output level of the comparator.

Hereinafter, exemplary embodiments of an optical mouse sensor chip according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is an overall block diagram of an optical mouse according to the present invention. Referring to FIG. 2, an optical mouse according to the present invention controls a sensing operation of the optical mouse while performing an interface with a PC, and senses data by the sensing operation. Mouse control unit 100 for providing a PC to the PC, and the optical mouse sensor for detecting the movement according to the control from the mouse control unit 100, and provides the data corresponding to the movement to the mouse control unit 100 And a chip 200.

The optical mouse sensor chip 200 detects a clock input from the mouse control unit 100 and provides a clock detector for providing an internal clock generation signal S1 and a clock selection signal S2 according to whether the clock input is performed. 210, an internal clock generator 220 generating a clock based on an internal clock generation signal S1 of the clock detector 210, and a clock selection signal S2 of the clock detector 210. A clock selector 230 which selects and provides one clock from an external clock from the mouse control unit 100 and an internal clock from the internal clock generator 220 and the clock selector 230. The sensor unit 240 detects the movement of the mouse in response to the clock and the internal clock generation signal S1 of the clock detection unit 210 becomes an operation state, and when the detection signal of the sensor unit 240 is inputted, Providing a wake-up signal to the mouse control unit 100 Converting the detected signal of the wake-up signal generating part 250 and the sensor unit 240 to digital data and a signal processing unit 260 provided in the mouse control unit 100.

3 is a detailed block diagram of the clock detector of FIG. 2. Referring to FIG. 3, the clock detector 210 blocks a noise component included in a clock from the mouse control unit 100. And a clock frequency detector 212 for detecting a frequency of the clock through the filter unit 211, a comparator 213 for comparing a detected value of the clock frequency detector 212 with a preset reference value, and The internal clock supply instruction unit 214 instructs the internal clock supply according to the output level of the comparison unit 213.

The clock frequency detector 212 is a frequency detector that detects a known frequency. For example, the clock frequency detector 212 detects an edge of a clock, that is, a falling edge or a rising edge, and is detected during a set time. It is implemented to detect the frequency by counting the number of times.

4 is a flowchart illustrating an internal clock generation process of an optical mouse according to the present invention. In FIG. 4, a process of providing an internal clock by determining whether an internal clock is generated by an external clock input by a sensor chip is shown.

Based on the accompanying drawings, the operation of the preferred embodiment of the present invention configured as described above will be described in detail below.

Referring to FIG. 2, the mouse control unit 100 of the optical mouse to which the present invention is applied provides a clock SCLK1 in a normal operation mode to control a sensing operation of a sander chip, and does not provide a clock in a power saving mode. . In this case, when a clock is input from the mouse control unit 100, the sensor chip 200 of the optical mouse detects a normal mouse movement according to the clock, and transmits data corresponding to the movement to the mouse control unit 200. On the other hand, when the external clock SCLK1 is not input from the mouse control unit 100 in the power saving mode, an internal clock SCLK2 is generated to generate a wake-up signal by itself when there is a mouse movement. Provides automatic wakeup based on mouse movement. This will be described in detail below.

The clock detector 210 of the sensor chip 200 detects a clock input from the mouse control unit 100 and provides an internal clock generation signal S1 and a clock selection signal S2 depending on whether the clock input is performed. (S45, S46), this will be described in more detail with reference to FIG.

First, the filter unit 211 of the clock detector 210 cuts out noise components included in the clock from the mouse control unit 100, unwanted components such as surge and impulse, and clocks the clock without noise as a clock frequency detector ( 212, the clock frequency detector 212 detects the frequency of the clock through the filter 211 and provides the detected value to the comparator 213 (S41 and S42).

Next, the comparison unit 213 compares the detected value Vd of the clock frequency detector 212 with a preset reference value Vref to determine whether an external clock is input, and according to the comparison result, a high level is determined. Alternatively, the low level is output to the internal clock supply instruction unit 214 (S43). Here, the reference value is a reference value that the clock can determine as a normal clock, and may be set differently according to the applied product.

The internal clock supply instruction unit 214 instructs the internal clock supply according to the output level of the comparison unit 213. That is, when it is determined that there is no input of the external clock, the internal clock generation signal S1 is internally supplied. The clock generator 220 and the wakeup signal generator 250 are provided, and at the same time, the clock select signal S2 is provided to the clock selector 230 (S45). On the other hand, when the external clock is input, the internal clock generation signal S1 and the clock selection signal S2 are not provided (S44).

Thereafter, the internal clock generator 220 generates a clock having a preset frequency according to the internal clock generation signal S1 of the clock detector 210 and provides the clock to the clock selector 230. The clock selector 230 is actually implemented as a multiplexer, and according to the clock select signal S2 of the clock detector 210, the external clock SCLK1 and the external clock SCLK1 from the mouse control unit 100 are controlled. One clock is selected and provided from the internal clock SCLK2 from the internal clock generator 220 (S46).

The sensor unit 240 detects the movement of the mouse according to the clock provided by the clock selector 230 and provides the detected signal to the wakeup signal generator 250 and the signal processor 260. The wakeup signal generator 250 is operated according to the internal clock generation signal S1 of the clock detector 210, and when the detection signal of the sensor unit 240 is input, the mouse control unit 100 is input. To provide a wake up signal. Such a sensor chip 200 can provide a wake-up signal to detect the movement using the internal clock in the power saving mode to immediately wake up if there is a movement.

On the other hand, in the normal operation mode, the signal processor 260 is called "DSP", which converts the detection signal of the sensor unit 240 into digital data and provides it to the mouse control unit 100.

As described above, the present invention can be applied not only to an optical mouse sensor chip made of a chip, but also to a sensor part of all optical mice made of a general circuit even if the chip is not made of a chip.

According to the present invention as described above, an internal clock generator is provided in the sensor chip of the optical mouse, and the internal clock generator is operated in the power saving mode. Accordingly, after entering the power mode in the optical mouse, the mouse wakes up button. You can wake up on its own as you move without having to choose it, and there is a special effect that can provide ease of use.

The above description is only a description of specific embodiments of the present invention, and the present invention is not limited to these specific embodiments, and various changes and modifications of the configuration are possible from the above-described specific embodiments of the present invention. It will be apparent to those skilled in the art to which the present invention pertains.

Claims (6)

In the optical mouse sensor chip 200 which detects a movement according to the control from the mouse control unit 100 that controls the overall operation of the optical mouse, and provides data corresponding to the movement to the mouse control unit 100. , A clock detection unit (210) for detecting a clock input from the mouse control unit (100) and providing an internal clock generation signal (S1) and a clock selection signal (S2) according to whether the clock is input; An internal clock generator 220 generating a clock according to the internal clock generation signal S1 of the clock detector 210; And According to the clock selection signal S2 of the clock detector 210, a clock that selects and provides one clock from an external clock from the mouse control unit 100 and an internal clock from the internal clock generator 220. Optical mouse sensor chip comprising a selection unit 230. According to claim 1, wherein the clock detector 210 A filter unit 211 for blocking a noise component included in a clock from the mouse control unit 100; A clock frequency detector 212 for detecting a frequency of the clock through the filter unit 211; A comparator 213 for comparing the detected value of the clock frequency detector 212 with a preset reference value; And And an internal clock supply instruction unit (214) for instructing internal clock supply according to the output level of the comparison unit (213). In the optical mouse sensor chip 200 which detects a movement according to the control from the mouse control unit 100 that controls the overall operation of the optical mouse, and provides data corresponding to the movement to the mouse control unit 100. , A clock detection unit (210) for detecting a clock input from the mouse control unit (100) and providing an internal clock generation signal (S1) and a clock selection signal (S2) according to whether the clock is input; An internal clock generator 220 generating a clock according to the internal clock generation signal S1 of the clock detector 210; According to the clock selection signal S2 of the clock detector 210, a clock that selects and provides one clock from an external clock from the mouse control unit 100 and an internal clock from the internal clock generator 220. Selection unit 230; A sensor unit 240 for detecting a movement of a mouse according to a clock provided from the clock selector 230; A wake-up signal that enters an operating state according to the internal clock generation signal S1 of the clock detector 210 and provides a wake-up signal to the mouse control unit 100 when a detection signal of the sensor unit 240 is input. Generating unit 250; And And a signal processor 260 for converting the detection signal of the sensor unit 240 into digital data and providing the same to the mouse control unit 100. 4. The clock detector of claim 3, wherein the clock detector 210 A filter unit 211 for blocking a noise component included in a clock from the mouse control unit 100; A clock frequency detector (212) for detecting a frequency of the clock through the filter (211); A comparator 213 for comparing the detected value of the clock frequency detector 212 with a preset reference value; And an internal clock supply instruction unit (214) for instructing internal clock supply according to the output level of the comparison unit (213). A mouse control unit 100 which controls the sensing operation of the optical mouse while providing an interface with the PC and provides the sensing data by the sensing operation to the PC; A clock detection unit (210) for detecting a clock input from the mouse control unit (100) and providing an internal clock generation signal (S1) and a clock selection signal (S2) according to whether the clock is input; An internal clock generator 220 generating a clock according to the internal clock generation signal S1 of the clock detector 210; According to the clock selection signal S2 of the clock detector 210, a clock that selects and provides one clock from an external clock from the mouse control unit 100 and an internal clock from the internal clock generator 220. Selection unit 230; A sensor unit 240 for detecting a movement of a mouse according to a clock provided from the clock selector 230; A wake-up signal that enters an operating state according to the internal clock generation signal S1 of the clock detector 210 and provides a wake-up signal to the mouse control unit 100 when a detection signal of the sensor unit 240 is input. Generating unit 250; And And a signal processor (260) for converting the detection signal of the sensor unit (240) into digital data and providing it to the mouse control unit (100). The method of claim 5, wherein the clock detector 210 A filter unit 211 for blocking a noise component included in a clock from the mouse control unit 100; A clock frequency detector (212) for detecting a frequency of the clock through the filter (211); A comparator 213 for comparing the detected value of the clock frequency detector 212 with a preset reference value; And an internal clock supply instruction unit (214) for instructing the internal clock supply according to the output level of the comparison unit (213).