Automatic actuation of device according to UV intensity

A thin film electro-luminescence (EL) display module, comprising:

• a light-emitting layer for emitting light in response to an alternate current voltage;
• a back electrode layer disposed at a side of said light-emitting layer;
• a light-transmitting conductive layer disposed at another side of said light-emitting layer opposite to said back electrode layer, and cooperating with said back electrode layer to provide said alternate current voltage for said light-emitting layer, said light-emitting layer and said light-transmitting conductive layer being patterned to define a plurality of independent display zones;
• a flexible and light-transmitting housing for accommodating therein said back electrode layer, said light-emitting layer and said light-transmitting conductive layer;
• and
• a control circuit electrically connected to said light-emitting layer and said light-transmitting conductive layer, determining said specified portion of display zones according to a specific character to be shown, and selectively providing said alternate current voltage for said specified portion of display zones to show said specific character.

A vehicular rearview mirror, comprising:

• a reflective mirror for showing image of an object;
• and
• at least one thin-film display unit attached to said reflective mirror for showing an active information,
• wherein said thin-film electro-luminescence display unit comprises a plurality of independent display zones, said plurality of independent display zones are selectively activated to emit light so as to show a specific character.