Display device, its pressing key set and method of active ating displaying device
A display device and button group technology, applied in user/computer interaction input/output, instrument, electrical digital data processing, etc., can solve the problems of display device structure damage, failure, and unsatisfactory anti-theft effect
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[0026] An example of the present invention is figure 1 And as shown in FIG. 2 , it is a projection display 1 . The projection display 1 includes a host 11 and a detachable key set 12 , and the host 11 includes a processor 101 , a memory 103 and an interface 105 . When the projection display 1 is connected to a power source, the processor 101 generates a first signal 100, which is a digital signal comprising a plurality of bits. The interface 105 is used for connecting to the detachable key set 12 . The button group 12 includes a signal generating device 107 , and the signal generating device 107 generates a second signal 102 in response to the first signal 100 . The memory 103 stores the first data. When the processor 101 receives the second signal 102 through the interface 105 , the processor 101 judges whether the second signal 102 is correct according to the first data, so as to determine whether the projection display 1 can be activated normally.
[0027] An implementat...
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