Source: http://www.google.com/patents/US8164047?ie=ISO-8859-1
Timestamp: 2014-03-07 19:59:00
Document Index: 59289226

Matched Legal Cases: ['art 130', 'art 130', 'art 130', 'art 130', 'art 130', 'art 130', 'art 130', 'art 130', 'art 130', 'art 130']

Patent US8164047 - Illuminance device having an opening at a rear part of a gas discharge lamp ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsAn illuminance device including a gas discharge lamp, an airflow generator, and a distributing duct is provided. The lamp has a reflector, a base connected to the reflector, a burner installed in the reflector, and the base, a first opening located at the reflector and a front part of the lamp, and a...http://www.google.com/patents/US8164047?utm_source=gb-gplus-sharePatent US8164047 - Illuminance device having an opening at a rear part of a gas discharge lamp and exposes the burner and projection systemAdvanced Patent SearchPublication numberUS8164047 B2Publication typeGrantApplication numberUS 12/619,691Publication dateApr 24, 2012Filing dateNov 17, 2009Priority dateApr 24, 2009Also published asUS20100271600Publication number12619691, 619691, US 8164047 B2, US 8164047B2, US-B2-8164047, US8164047 B2, US8164047B2InventorsChih-Cheng Chou, Shang-Hsuang Wu, Kai-Lun HouOriginal AssigneeYoung Green Energy Co.Export CitationBiBTeX, EndNote, RefManPatent Citations (8), Classifications (6), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetIlluminance device having an opening at a rear part of a gas discharge lamp and exposes the burner and projection systemUS 8164047 B2Abstract An illuminance device including a gas discharge lamp, an airflow generator, and a distributing duct is provided. The lamp has a reflector, a base connected to the reflector, a burner installed in the reflector, and the base, a first opening located at the reflector and a front part of the lamp, and a second opening located at a rear part of the lamp and exposing the burner. The distributing duct has an inlet, a first outlet, and a second outlet, and an opening area of the first outlet is larger than that of the second outlet. A cooling airflow provided by the airflow generator enters the distributing duct via the inlet, the distributing duct guides a part of the cooling airflow to the first opening via the first outlet, and the distributing duct guides another part of the cooling airflow to the second opening via the second outlet.
1. An illuminance device, comprising:
a gas discharge lamp having a reflector, a base connected to the reflector, a burner installed in the reflector and the base, a first opening, and a second opening, wherein the first opening is located at the reflector and a front part of the gas discharge lamp, and the second opening is located at a rear part of the gas discharge lamp and exposes the burner;
a first airflow generator capable of providing a cooling airflow; and
a distributing duct having an inlet, a first outlet, and a second outlet, wherein an opening area of the first outlet is larger than an opening area of the second outlet, the cooling airflow provided by the first airflow generator is capable of entering the distributing duct via the inlet, the distributing duct is capable of guiding a part of the cooling airflow to the first opening for entering the reflector via the first outlet, and the distributing duct is capable of guiding another part of the cooling airflow to the second opening via the second outlet for cooling the burner.
10. The illuminance device as claimed in claim 1, further comprising:
a second airflow generator capable of providing another cooling airflow flowing to external of the reflector and external of the base.
an illuminance device capable of providing a light beam, the illuminance device comprising:
a distributing duct having an inlet, a first outlet, and a second outlet, wherein an opening area of the first outlet is larger than an opening area of the second outlet, the cooling airflow provided by the first airflow generator is capable of entering the distributing duct via the inlet, the distributing duct is capable of guiding a part of the cooling airflow to the first opening for entering the reflector via the first outlet, and the distributing duct is capable of guiding another part of the cooling airflow to the second opening via the second outlet for cooling the burner;
a light valve capable of converting the light beam passing through the first opening into an image beam; and
a lens disposed in a transmission path of the image beam, and capable of projecting the image beam to external of the projection system to form an image.
20. The projection system as claimed in claim 11, wherein the illuminance device further comprises:
a second airflow generator capable of providing another cooling airflow flowing to external of the reflector and external of the base. Description
CROSS-REFERENCE TO RELATED APPLICATION This application claims the priority benefit of Taiwan application serial no. 98113694, filed Apr. 24, 2009. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of specification.
The invention relates to an illuminance device. More particularly, the invention relates to an illuminance device adapted to a projection system.
An ultra high pressure mercury lamp is generally used as a light source of a present projector, and the ultra high pressure mercury lamp is one kind of a gas discharge lamp. Since an operation temperature of the ultra high pressure mercury lamp is very high, during operation, the ultra high pressure mercury lamp has to be cooled down to avoid burning damage.
During a cooling process of the ultra high pressure mercury lamp, a bulb of a burner of the ultra high pressure mercury lamp has to be maintained to a specific high temperature range, while the temperature of other parts (for example, welding points among elements) of the burner cannot be too high. If these temperature requirements cannot be satisfied, a lifespan of the ultra high pressure mercury lamp is decreased.
References related to the light source cooling include Taiwan patent No. I235281 and I261858, and U.S. Pat. No. 6,976,760. Other references related to the light source cooling include Taiwan patent application publication No. 200725158 and 200732821, Taiwan patent No. M278917 and U.S. Pat. No. 6,558,004.
SUMMARY OF THE INVENTION The invention is directed to an illuminance device having a good self-cooling effect.
The invention is directed to a projection system having an illuminance device, and the illuminance device has a good self-cooling effect.
An embodiment of the invention provides an illuminance device including a gas discharge lamp, an airflow generator, and a distributing duct. The gas discharge lamp has a reflector, a base connected to the reflector, a burner installed in the reflector, and the base, a first opening located at the reflector and a front part of the gas discharge lamp, and a second opening located at a rear part of the gas discharge lamp and exposing the burner. The airflow generator is capable of providing a cooling airflow. The distributing duct has an inlet, a first outlet, and a second outlet, wherein an opening area of the first outlet is larger than an opening area of the second outlet. The cooling airflow provided by the airflow generator is capable of entering the distributing duct via the inlet, the distributing duct is capable of guiding a part of the cooling airflow to the first opening for entering the reflector via the first outlet, and the distributing duct is capable of guiding another part of the cooling airflow to the second opening via the second outlet for cooling the burner.
The embodiment of the invention provides a projection system using the aforementioned illuminance device as a light source.
The embodiment or the embodiments of the invention may have the at least one of the following advantages. In the embodiment of the invention, extra cooling airflow is provided to the opening located at the rear part of the gas discharge lamp and exposing the burner. Namely, a bulb of the gas discharge lamp and the rear part of the gas discharge lamp are simultaneously cooled down by the cooling airflow provided by the airflow generator, so as to decrease the temperatures of the bulb and the burner installed in the base, and maintain the temperature of any part of the burner within a normal operation range, such that the utilization lifespan of the gas discharge lamp may be prolonged.
FIG. 1 is a cross-section view of a projection system according to an embodiment of the invention.
FIG. 2 is a cross-section view of a projection system according to another embodiment of the invention.
FIG. 3 is a cross-section view of a projection system according to another embodiment of the invention.
FIG. 4 is a cross-section view of a projection system according to another embodiment of the invention.
FIG. 1 is a cross-section view of a projection system according to an embodiment of the invention. Referring to FIG. 1, the projection system 10 includes an illuminance device 100, a light valve 12, and a lens 14. The illuminance device 100 is capable of providing a light beam, and the light valve 12 is disposed in a transmission path of the light beam and suitable for converting the light beam into an image beam. The lens 14 is disposed in the transmission path of the image beam and capable of projecting the image beam to external of the projection system 10 to form an image.
The illuminance device 100 includes a gas discharge lamp 110, a first airflow generator 120, and a distributing duct 130. The gas discharge lamp 110 has a reflector 112, a base 114 connected to the reflector 112, a burner 116 installed in the reflector 112, and the base 114, a first opening 118 a located at the reflector 112 and a front part of the gas discharge lamp 110, and a second opening 118 b located at a rear part of the gas discharge lamp 110 and exposing the burner 116. In the embodiment, the gas discharge lamp 110 may be an ultra high pressure mercury lamp, the second opening 118 b is located at the base 114, and the light beam is transmitted to the light valve 12 through the first opening 118 a. The first airflow generator 120 provides a cooling airflow. The distributing duct 130 has an inlet 132, a first outlet 134, and a second outlet 136, wherein an opening area of the first outlet 134 is larger than an opening area of the second outlet 136. The cooling airflow provided by the first airflow generator 120 enters the distributing duct 130 via the inlet 132. The distributing duct 130 guides a part of the cooling airflow to the first opening 118 a via the first outlet 134, so that the part of the cooling airflow may enter the reflector 112 to cool down the burner 116, and the distributing duct 130 guides another part of the cooling airflow to the second opening 118 b via the second outlet 136 for cooling the burner 116.
The distributing duct 130 extends from the front part of the gas discharge lamp 110 to the rear part of the gas discharge lamp 110. The first outlet 134 is located adjacent and facing to the first opening 118 a, the second outlet 136 is located adjacent and facing to the second opening 118 b, and an outlet 122 of the first airflow generator 120 is located adjacent and facing to the inlet 132. By such means, the utilization efficiency of the cooling airflow is improved. In the embodiment, the distributing duct 130 may extend along a profile of the reflector 112, which avails shielding stray light and saves a space.
The distributing duct 130 has a front part 130 a, a rear part 130 b, and a middle part 130 c connected to the front part 130 a and the rear part 130 b. The inlet 132 and the first outlet 134 are located at the front part 130 a of the distributing duct 130. The second outlet 136 is located at the rear part 130 b of the distributing duct 130.
In the embodiment, the inlet 132 is located facing to the first outlet 134, and the inlet 132 may avail guiding most of the cooling airflow to the first outlet 134 having the relatively great opening area. Moreover, one or a plurality of splitter plates (not shown) may be disposed at the first outlet 134 of the distributing duct 130 for distributing the airflow output from the first outlet 134 to the first opening 118 a. In the embodiment, a distance between the second outlet 136 and the second opening 118 b may be less than 12.5 millimeters, so as to ensure a good cooling effect.
In the embodiment, the first airflow generator 120 may be a centrifugal fan.
However, different to the embodiment of FIG. 1 that the first airflow generator 120 is the centrifugal fan, in another embodiment of FIG. 2, the first airflow generator 120A of the illuminance device 100A of the projection system 10A may also be an axial fan. Moreover, the inlet 132 may further be located at the middle part 130 c of the distributing duct 130A. The first outlet 134 is located at the front part 130 a of the distributing duct 130A, and the second outlet 136 is located at the rear part 130 b of the distributing duct 130A.
FIG. 3 is a cross-section view of a projection system according to another embodiment of the invention. Referring to FIG. 3, the projection system 10B of the embodiment is similar to the projection system 10 of FIG. 1, and a difference there between is that the illuminance device 100B of the projection system 10B of FIG. 3 further includes another airflow generator 125B. The airflow generator 125B is used for providing the cooling airflow to external of the reflector 112 and external of the base 114. Moreover, the first airflow generator 120 and the second airflow generator 125B are located at the same side of the gas discharge lamp 110.
FIG. 4 is a cross-section view of a projection system according to another embodiment of the invention. Referring to FIG. 4, the projection system 10C of the embodiment is similar to the projection system 10B of FIG. 3, and a difference there between is that in the illuminance device 100C of the projection system 10C of FIG. 4, the first airflow generator 120 and the second airflow generator 125C are respectively located at two sides of the gas discharge lamp 110.
In summary, the embodiment or the embodiments of the invention may have the at least one of the following advantages. According to the above embodiments of the invention, extra cooling airflow is provided to the opening located at the rear part of the gas discharge lamp and exposing the burner. Namely, a bulb of the gas discharge lamp and the rear part of the gas discharge lamp are simultaneously cooled down by the cooling airflow provided by the airflow generator, so as to decrease the temperatures of the bulb and the burner installed in the base, and maintain the temperature of any part of the burner within a normal operation range, such that the utilization lifespan of the gas discharge lamp may be prolonged.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS6558004Jul 6, 2001May 6, 2003Seiko Epson CorporationProjectorUS6976760Dec 4, 2001Dec 20, 2005Seiko Epson CorporationProjector having a cooling passage that cools the light source and outer caseUS7367679 *Oct 3, 2006May 6, 2008Infocus CorporationLight source for a display deviceTW200725158A Title not availableTW200732821A Title not availableTWI235281B Title not availableTWI261858B Title not availableTWM278917U Title not available* Cited by examinerClassifications U.S. Classification250/239, 353/61International ClassificationH01J5/02Cooperative ClassificationH01J61/52, G03B21/16European ClassificationG03B21/16Legal EventsDateCodeEventDescriptionDec 8, 2009ASAssignmentFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CHOU, CHIH-CHENG;WU, SHANG-HSUANG;HOU, KAI-LUN;REEL/FRAME:023616/0001Effective date: 20091110Owner name: YOUNG GREEN ENERGY CO., TAIWANRotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google