Abstract: The disclosure discloses a mouse key identification circuit, a mouse key identification device and a mouse. The mouse key identification circuit comprises: N keys, M collection ports, a Light-Emitting Diode (LED) driver circuit and a grounding terminal, wherein part or all of i keys in N keys are connected to the LED port of the LED driver circuit by one respective end, while the other end of the i keys is connected to i collection ports of the M collection ports respectively, wherein i is less than N and N is a natural number; the grounding terminal is connected to one respective end of N?i keys of the N keys, and the other end of the N?i keys is connected to N?i collection ports of the M collection ports respectively. With the disclosure, the number of signal collection ports can be reduced and the cost of a mouse can be lowered.

Abstract: The disclosure discloses a mouse key identification circuit, a mouse key identification device and a mouse. The mouse key identification circuit comprises: N keys, M collection ports, a Light-Emitting Diode (LED) driver circuit and a grounding terminal, wherein part or all of i keys in N keys are connected to the LED port of the LED driver circuit by one respective end, while the other end of the i keys is connected to i collection ports of the M collection ports respectively, wherein i is less than N and N is a natural number; the grounding terminal is connected to one respective end of N?i keys of the N keys, and the other end of the N?i keys is connected to N?i collection ports of the M collection ports respectively. With the disclosure, the number of signal collection ports can be reduced and the cost of a mouse can be lowered.

Abstract: The present invention discloses a method for motion sensing of sub-pixel level precision. The method comprises the following steps: acquiring a reference image (reference frame) and a sample image (sample frame) of a surface; calculating the correlation between the reference frame and the sample frame to obtain a motion vector of a photoelectric mouse with respect to this surface; subjecting the reference frame and the sample frame to interpolation to obtain the interpolated reference frame and the interpolated sample frame; calculating the correlation between the interpolated reference frame and the interpolated sample frame in order to correct the aforesaid motion vector and to obtain the movement of the sub-pixel. The precision of displacement measurement can be improved effectively by this method under the condition that sensor's characteristics are not changed to improve the performance of the photoelectric mouse.

Abstract: The present invention discloses a method for motion sensing of sub-pixel level precision. The method comprises the following steps: acquiring a reference image (reference frame) and a sample image (sample frame) of a surface; calculating the correlation between the reference frame and the sample frame to obtain a motion vector of a photoelectric mouse with respect to this surface; subjecting the reference frame and the sample frame to interpolation to obtain the interpolated reference frame and the interpolated sample frame; calculating the correlation between the interpolated reference frame and the interpolated sample frame in order to correct the aforesaid motion vector and to obtain the movement of the sub-pixel. The precision of displacement measurement can be improved effectively by this method under the condition that sensor's characteristics are not changed to improve the performance of the photoelectric mouse.

Abstract: This invention relates to a pharmaceutical composition used for treating cardiovascular diseases and a method for preparing it. The pharmaceutical composition mainly contains polysacchrides, saponins and amino acids extracted from Radix ginseng, Radix ophiopogonis and Fructus schisandrae chinensis. The method of preparing it includes the following steps: Radix ginseng, Radix ophiopogonis and Fructus schisandrae chinensis are decocted together in water; water extract or eluate is precipitated with alcohol or acetone, treated with macroporous adsorption resin and with ion exchange resin, and then separated to obtain pharmaceutical composition containing effective fractions of polysacchrides, saponins and amino acids. The above mentioned pharmaceutical composition can be formed into various preparations by mixing with any pharmaceutically acceptable auxiliary materials.