Projector and control method thereof

• US 7,950,807 B2
• Filed: 02/26/2008
• Issued: 05/31/2011
• Est. Priority Date: 03/09/2007
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Shirasu, Toshiyuki, Nagumo, Hirobumi
• Primary Examiner(s): Epps; Georgia Y
• Assistant Examiner(s): Reilly-Diakun; Jori S
• Application Number:
  US12/037,330
• Publication Number:
  US 20080218701A1
• Time in Patent Office: 1,190 Days
• Field of Search: 353 85- 87, 353121-122, 315/291, 315293-294
• US Class Current: 353/85
• CPC Class Codes: G03B 21/003 Cine-projectors
• CPC Class Codes: G03B 21/206 Control of light source other than position or intensity
• CPC Class Codes: H04N 9/3155 for controlling the light source light source control per se H05B35/00 – H05B47/00; control of an illumination source for displays in general G09G3/3406

Abstract

Disclosed herein is a projector that can be loaded with lamps of a plurality of kinds, each of a plurality of the lamps loadable into the projector being given a lamp serial code formed by arranging lamp information including at least a minimum wattage and a maximum wattage of the lamp and a check sum in predetermined order. The projector includes: a lamp power supply for driving the lamp loaded in the projector, the lamp power supply being provided in advance with a plurality of mode ranges each as a range from a minimum wattage to a maximum wattage of output of the lamp power supply, and one predetermined mode range of the plurality of mode ranges being freely set in the lamp power supply; and a control circuit for controlling the lamp power supply.

Claims

1. A projector that can be loaded with lamps of a plurality of kinds, each of a plurality of said lamps loadable into said projector being given a lamp serial code formed by arranging lamp information including at least a minimum wattage and a maximum wattage of the lamp and a check sum in predetermined order, said projector comprising:

a lamp power supply for driving said lamp loaded in said projector, said lamp power supply being provided in advance with a plurality of mode ranges each as a range from a minimum wattage to a maximum wattage of output of said lamp power supply, and one predetermined mode range of said plurality of mode ranges being freely set in said lamp power supply; and

a control circuit for controlling said lamp power supply;

wherein when said lamp loaded in said projector is replaced with a predetermined lamp, said control circuit receives input of said lamp serial code attached to the predetermined lamp,

by checking a part corresponding to said check sum in information input as said lamp serial code, said control circuit determines whether the input information is a valid said lamp serial code,

when said control circuit determines that the input information is a valid said lamp serial code, said control circuit sets a range from the minimum wattage to the maximum wattage included in the lamp serial code as a code range, and compares the code range with said mode range set in said lamp power supply,

said control circuit determines a range not exceeding said maximum wattage of said predetermined lamp as a lamp driving controlling range within which the driving of said lamp power supply is controlled on a basis of a result of comparison of said code range with said mode range, and

said control circuit controls the driving of said lamp power supply within the determined lamp driving controlling range.

2. The projector according to claim 1, wherein said control circuit determines a range in which said code range and said mode range overlap each other as said lamp driving controlling range.

3. A control method of a projector that can be loaded with lamps of a plurality of kinds, each of a plurality of said lamps loadable into said projector being given a lamp serial code formed by arranging lamp information including at least a minimum wattage and a maximum wattage of the lamp and a check sum in predetermined order, said projector including a lamp power supply for driving said lamp loaded in said projector, said lamp power supply being provided in advance with a plurality of mode ranges each as a range from a minimum wattage to a maximum wattage of output of said lamp power supply, and one predetermined mode range of said plurality of mode ranges being freely set in said lamp power supply, and a control circuit for controlling said lamp power supply, said control method comprising:

when said lamp loaded in said projector is replaced with a predetermined lamp, said control circuit receiving input of said lamp serial code attached to the predetermined lamp;

by checking a part corresponding to said check sum in information input as said lamp serial code, said control circuit determining whether the input information is a valid said lamp serial code;

when said control circuit determines that the input information is a valid said lamp serial code, said control circuit setting a range from the minimum wattage to the maximum wattage included in the lamp serial code as a code range, and comparing the code range with said mode range set in said lamp power supply;

said control circuit determining a range not exceeding said maximum wattage of said predetermined lamp as a lamp driving controlling range within which the driving of said lamp power supply is controlled on a basis of a result of comparison of said code range with said mode range; and

said control circuit controlling the driving of said lamp power supply within the determined lamp driving controlling range.