Patent ID: 9410178
Filing Date: 2016-08-09
CPC Classification: B01L,C12Q,G01N,H01J

Claim Text:
1. A biological particle analyzer comprising: a microchannel including an end coupled to a first drive electrode, another end coupled to a second drive electrode, a first detection area at an upstream location and an excitation area at a downstream location for containing particles to flow from the upstream location to the down stream location inside the microchannel; a first detection circuit coupled to the first detection area for outputting a first detection result when at least one particle has arrived at the first detection area; a light emission source for emitting a light to the excitation area; a second detection circuit coupled to a second detection area located at a downstream location of the first detection area inside the microchannel for outputting a second detection result to the control module when the particles have arrived at the second detection area; and a control module coupled to the first detection circuit, the second detection circuit and the light emission source for determining when to turn on or off the light emission source according to the first detection result to save power consumption of the light emission source; wherein the control module is configured to calculate a turn-on time according to different particle characteristics and an average velocity of the at least one particle, and the light emission source is turned on only when the at least one particle is being tested during the turn-on time; wherein when the first detection result indicates that a first particle of the at least one particle has arrived at the first detection area, the control module outputs the control signal to the light emission source to turn on the light emission source, and when the second detection result indicates that the first particle has arrived at the second detection area, the control module outputs the control signal to the light emission source to turn off the light emission source; wherein the control module further comprises a counter for recording a first particle number when the first particle of the at least one particle has arrived at the first detection area and a second particle number when the first particle of the at least one particle has arrived at the second detection area to determine to turn on or off the light emission source.