Method for controlling picture size in an LCD projector
First Claim
1. A method for automatically controlling picture size in an LCD projector during a warm-up period of a lighting source of the projector, comprising the steps of:
- a) detecting whether power is turned ON or OFF;
b) initially projecting a minimum picture size, when the power is turned on; and
c) gradually increasing, during a warm-up period, the picture size from the minimum picture size to a predetermined picture size.
1 Assignment
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Accused Products
Abstract
A start-up device for automatically controlling picture size in an LCD projector during a warm-up period of a lighting source of the projector, the device including: a power detector for detecting whether power to the projector has been turned on or off; a size initializing device for initializing the picture size output by the projector to a minimum value when power is turned on; a growing device, responsive to the initializing means, for gradually increasing the picture size from the minimum size to a predetermined size, during a warm-up period. The start-up device also includes: a brightness initializing device for initially setting one or both of a picture brightness and a picture contrast to a maximum level when power is turned on; and a dimming device, responsive to the growing device, for changing the brightness and/or the contrast from the maximum level to a predetermined level, the change being completed so as to be commensurate in time with the picture size being increased to the predetermined size. The start-up device further includes: a shrinking device for gradually decreasing the picture size from the predetermined size to the minimum size when power is turned off; and a termination device, responsive to the shrinking means, for terminating projection of the picture when the minimum picture size has been attained.
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Citations
21 Claims
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1. A method for automatically controlling picture size in an LCD projector during a warm-up period of a lighting source of the projector, comprising the steps of:
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a) detecting whether power is turned ON or OFF; b) initially projecting a minimum picture size, when the power is turned on; and c) gradually increasing, during a warm-up period, the picture size from the minimum picture size to a predetermined picture size. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for automatically controlling picture size in an LCD projector during a warm-up period of a lighting source of the projector, the apparatus comprising:
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power detector means for detecting whether power to the projector has been turned on or off; size initializing means, responsive to the power detector means detecting that power has been turned on, for initializing the picture size output by the projector to a minimum value; growing means, responsive to the initializing means, for gradually increasing the picture size from the minimum size to a predetermined size, during a warm-up period. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An article of manufacture comprising:
a computer usable medium including computer-readable program code means, embodied therein, for causing a computer to automatically control picture size in an LCD projector during a warm-up period of a lighting source of the projector, the computer-readable program code means in the article of manufacture comprising; computer-readable program code power detector means for causing the computer to detect whether power to the projector has been turned on or off; computer-readable program code size initializing means for causing the computer to initialize, when the power has been turned on, the picture size to a minimum value; computer-readable program code growing means for causing the computer to gradually increase the picture size from the minimum size to a predetermined size, during a warm-up period. - View Dependent Claims (16, 17, 18, 19, 20, 21)
Specification