Projection apparatus

• US 5,860,720 A
• Filed: 10/01/1996
• Issued: 01/19/1999
• Est. Priority Date: 10/03/1995
• Status: Expired due to Term

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Negishi, Noriaki, Kunori, Taishi, Yamashita, Katsuhiro, Suzuki, Akio
• Primary Examiner(s): DOWLING, WILLIAM C
• Application Number:
  US08/722,577
• Time in Patent Office: 840 Days
• Field of Search: 353/74, 353/75, 353/87, 353/85, 353/72, 353/73, 348/842, 348/787, 348/794
• US Class Current: 353/74
• CPC Class Codes: G03B 21/10 Projectors with built-in or built-on screen
• CPC Class Codes: G03B 21/145 Housing details, e.g. position adjustments thereof
• CPC Class Codes: G03B 21/20 Lamp housings
• CPC Class Codes: H04N 9/3141 Constructional details thereof details not peculiar to the presence of an electronic spatial light modulator G03B21/14

Abstract

A light source for use in a liquid-crystal rear projector serving as a projection apparatus can be changed from a front to thereby improve a performance of the apparatus. The liquid-crystal rear projector serving as the projection apparatus includes a light source accommodating portion provided at a front for accommodating therein a lamp house having a lamp light source, the lamp house being of a cartridge type accommodated in the light source accommodating portion, and a handling portion disposed at a front of the accommodated lamp house for explaining how to exchange the lamp house.

Claims

1. A projection apparatus having a cabinet and a screen, the apparatus comprising:

a lamp house having a light source for producing light and irradiating a rear of the screen, wherein said lamp house is attached to the cabinet so as to become removable from a front of the cabinet facing the screen; and

a protection cover member for covering a front of said lamp house and wherein said protection cover member has instruction means for explaining to a user of the projection video apparatus how to handle said lamp house.

2. A projection apparatus according to claim 1, wherein said lamp house includes a cover formed of a mesh-like member and further includes a grip formed of a heat-insulating member.

3. A projection apparatus comprising:

a cabinet;

a screen disposed at a front of said cabinet;

a lamp house having a light source therein;

accommodation means for accommodating said lamp house at said front of said cabinet, wherein said lamp house is removable from said front of said cabinet; and

a cover arranged over a front side of said lamp house, wherein said cover includes instruction means for explaining to a user of the projection apparatus how to remove said lamp house.

4. A projection apparatus according to claim 3, wherein said lamp house includes a lamp cover having a plurality of holes formed therein.

5. A projection apparatus according to claim 3, wherein said lamp house includes gripping means for use by a user of the projection apparatus in removing said lamp house from said cabinet and for setting said lamp house into said cabinet.

6. A projection apparatus comprising:

a cabinet;

a screen disposed at a front of said cabinet;

a mirror disposed inside said cabinet at a back portion thereof;

an optical unit disposed in said cabinet;

a lamp house including a light source mounted therein;

accommodation means for accommodating said lamp house at said front of said cabinet, wherein said lamp house is removable from said front of said cabinet; and

a cover arranged over a front side of said lamp house, wherein said cover includes instruction means for explaining to a user of the projection apparatus how to remove said lamp house.

7. A projection apparatus according to claim 6, wherein said lamp house includes a lamp cover having a plurality of holes formed therein.

8. A projection apparatus according to claim 6, wherein said lamp house includes gripping means for use by a user of the projection apparatus in removing said lamp house from said cabinet and for setting said lamp house into said cabinet.

9. A projection apparatus comprising:

an upper cabinet;

a lower cabinet arranged below said upper cabinet;

a screen disposed at a front of said upper cabinet;

a mirror disposed inside said upper cabinet at a back portion thereof;

a lamp house including an optical light source arranged therein;

accommodation means for accommodating said lamp house at said front of said lower cabinet, wherein said lamp house is removable from said front of said lower cabinet; and

a cover arranged over a front of said lamp house, wherein said cover includes instruction means for explaining to a user of the projection apparatus how to remove said lamp house.

10. A projection apparatus according to claim 9, wherein said lamp house includes a lamp cover having a plurality of holes formed therein.

11. A projection apparatus according to claim 9, wherein said lamp house includes gripping means for use by a user of the projection apparatus in removing said lamp house from said lower cabinet and for setting said lamp house into said lower cabinet.

12. A projection apparatus comprising:

an upper cabinet;

a lower cabinet arranged below said upper cabinet;

a screen disposed at a front of said upper cabinet;

a mirror disposed inside said upper cabinet at a back portion thereof;

an optical unit having a projection lens and located in said lower cabinet;

a lamp house having a light source for projecting a light to said optical unit; and

lamp house accommodation means arranged in said lower cabinet for accommodating said lamp house and being located at said front of said lower cabinet, wherein said lamp house is removable from said front of said lower cabinet.

13. A projection apparatus according to claim 12, wherein said lamp house includes a lamp cover having a plurality of holes formed therein.

14. A projection apparatus according to claim 12, wherein said lamp house includes gripping means for use by a user of the projection apparatus in removing said lamp house from said lower cabinet and for setting said lamp house into said lower cabinet.

15. A projection apparatus according to claim 12, further comprising a cover arranged over a front side of said lamp house.

16. A projection apparatus according to claim 15, wherein said cover includes instruction means for explaining to a user of the projection apparatus how to remove said lamp house.

17. A projection apparatus according to claim 12, further comprising two speakers located at a right side and a left side of said lower cabinet, respectively.

18. A projection apparatus according to claim 12, further comprising a grille cover located at the front of said lower cabinet for covering said lamp house.