Projection type video display
AssigneeSanyo Electric Co., Ltd.
InventorsHirotake Horiguchi, Takeshi Higashino, Ryosuke Sato
Life of this patent
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Abstract
Data of a barometric pressure that a barometric pressure sensor outputs, and data of an air volume that an air-volume sensor outputs are input into a system control circuit. The system control circuit is provided with a table storing portion. In the table storing portion, a control table is stored. The control table is formed of a plus supplied-voltage value to fan power set by a barometric pressure value and an air-volume value, and a warning instruction. In a case that the warning instruction is selected based on the barometric pressure value and the air-volume value, the system control circuit turns on a warning-use LED so as to inform a user that a filter is clogged.
Claims4
A projection type video display for applying an optical modulation to light emitted from a light source by a light valve, and projecting image light obtained by this optical modulation, comprising:
- an air-cooling means for cooling inside the display by air;
- a filter provided at an outside-air intake port;
- an air-volume sensor for detecting a volume of air drawn from the outside-air intake port;
- and
- a warning-outputting means for outputting a warning informing that the filter is clogged based on air-volume data from the air-volume sensor.
Dependencies are inferred from the claim text.