Test strip reader for detecting bioreaction changes

1. A diagnostic test device, comprising:

a test strip plate or cassette configured for detecting pathological change, the test strip plate or cassette comprising a test strip and being configured for generating a control line and two test lines at respective specific positions of the test strip according to a test result; and

a test strip reader comprising:

four light sources;

a timing generator configured for generating time-controlled signals;

a driver configured for driving the light sources to emit lights to sections of the test strip corresponding to the control line and the test lines and to a background of the test strip, respectively, in sequence according to the time-controlled signals;

four photo detectors configured for receiving the lights reflected from the sections of the test strip and from the background of the zone, respectively, in sequence according to the time-controlled signals and generating a detecting signal;

a signal processor configured for processing the detecting signal to generate a result signal corresponding to the test result; and

a display configured for display the test result according to the result signal;

wherein the timing generator, the driver, and the signal processor are integrated into a printed circuit board (PCB), and the light sources, the photo detectors, and the display are mounted on and electrically connected to the PCB at appropriate positions.

2. The diagnostic test device of claim 1 , wherein the test strip plate or cassette reader further comprises a shell, the shell defines a cavity receiving the PCB, the light sources, and the photo detectors, the shell defines an insertion slot to allow the test strip plate or cassette to be inserted into the cavity for reading the test result, and the shell also defines an opening to allow the display to be exposed from the shell therethrough.

3. The diagnostic test device of claim 1 , wherein the test strip plate or cassette reader further comprises a shell, the PCB is mounted on the shell, and the shell further defines a positioning slot for positioning the test strip plate or cassette at a position ready for reading the test result.

4. The diagnostic test device of claim 1 , wherein the test strip plate or cassette reader further comprises a positional switch positioned on the PCB at appropriate position such that when the test strip plate or cassette is at a position ready for reading the test result the positional switch is turned on by the test strip plate or cassette by a contact between the positional switch and the test strip plate or cassette, and the positional switch is electrically connected to and configured for activating the timing generator, the driver, and the signal processor.

5. The diagnostic test device of claim 4 , wherein the test strip plate or cassette reader further comprises an indicator, the indicator is positioned on the PCB and electrically connected to the positional switch and the signal processor, and the indicator is configured for indicating states and the test.

6. The diagnostic test device of claim 5 , wherein the indicator give a first indication when the test strip plate or cassette reader is turned on, a second indication when the test strip plate or cassette is valid, and a third indication when the test strip plate or cassette is invalid.