Combination fixed segment and active matrix vacuum fluorescent display
First Claim
Patent Images
1. A vacuum fluorescent display having, in combination, a reconfigurable display portion and a fixed segment portion, comprising:
- a vacuum fluorescent display tube having anode and cathode elements, and intermediate control grids;
a mounting surface of the tube supporting a silicon substrate and a fixed segment anode array on the mounting surface spaced from the silicon substrate;
the silicon substrate containing an active matrix anode array and an interface circuit; and
the interface circuit having an input for receiving external control signals and an output including a first driver circuit coupled to the active matrix anode array and a second driver circuit coupled to the fixed segment anode array for activating the display.
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Abstract
A single glass envelope contains fixed anode segments on the glass surface and a silicon substrate mounted on the same surface. The silicon substrate contains an active matrix vacuum fluorescent anode array as well as serial interface circuitry and a driver circuit for each of the AMVFD and the fixed segment display to minimize the number of input pins in the lead frame of the envelope. Aluminum traces on the glass surface are wire bonded to the substrate and extend to the fixed segments and to the lead frame pins.
45 Citations
5 Claims
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1. A vacuum fluorescent display having, in combination, a reconfigurable display portion and a fixed segment portion, comprising:
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a vacuum fluorescent display tube having anode and cathode elements, and intermediate control grids; a mounting surface of the tube supporting a silicon substrate and a fixed segment anode array on the mounting surface spaced from the silicon substrate; the silicon substrate containing an active matrix anode array and an interface circuit; and the interface circuit having an input for receiving external control signals and an output including a first driver circuit coupled to the active matrix anode array and a second driver circuit coupled to the fixed segment anode array for activating the display. - View Dependent Claims (2, 3, 4, 5)
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Specification