CN100428050C - Light shading structure of projector lamp - Google Patents
Light shading structure of projector lamp Download PDFInfo
- Publication number
- CN100428050C CN100428050C CNB021419620A CN02141962A CN100428050C CN 100428050 C CN100428050 C CN 100428050C CN B021419620 A CNB021419620 A CN B021419620A CN 02141962 A CN02141962 A CN 02141962A CN 100428050 C CN100428050 C CN 100428050C
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- Prior art keywords
- dazzling screen
- bulb
- lampshade
- light
- air outlet
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Abstract
The present invention provides light shading structure of a projector lamp, which comprises a fan capable of generating airflow, a lamp positioned in the airflow, an air outlet and at least one anti-dazzling screen positioned between the lamp and the air outlet, and the air outlet is positioned at one side of the lamp. The present invention is formed by the way that the anti-dazzling screen is arranged along a lampshade, the airflow generated by the fan flows across the lamp lampshade which is composed of an approximate column and an approximate circular cone; a no-wind return flow region is formed at the lee side which is provided with a front anti-dazzling screen, and the upper and the lower sides of the lampshade are respectively provided with an upper anti-dazzling screen and a lower anti-dazzling screen. The front anti-dazzling screen, the upper anti-dazzling screen and the lower anti-dazzling screen are fixed on a light frame of the lamp by screw bolts, the other end and the lampshade keep a proper distance to prevent light rays penetrating through the lampshade to the air outlet high-brightness light rays sent by a lamp post from leaking out of a projector, and the air flow can be led to cool the lampshade. Therefore, the air outlet does not need to be additionally provided with a palisade for filling with shading light in an inclined way to reduce the wind resistance of the air outlet.
Description
Technical field
The present invention relates to a kind of projector, particularly relate to a kind of light-shielding structure of projecting camera light bulb.
Background technology
Flourish along with science and technology, projector is applied to various fields, is accompanied by the raising of using high power bulb and picture brightness, and the heat radiation of optical projection system and light leak problem are even more important.Therefore, how to improve the radiating effect of projector effectively and reach shaded effect,, become the problem of this area research and development to improve product market competitiveness.
See also Fig. 1, bulb 10 and air outlet fence 111 for existing projector, the bulb 10 of general projector is to surround a lamppost 102 by glass lamp shade 101 to be constituted, because lamppost 102 need send the lighting source of high brightness, except using high-power bulb 10, at the inner surface of glass lamp shade 101, also need electroplate or apply the top layer of one deck high reflectance, to reflect the light that lamppost 102 sends.Yet, because the high-brightness light that lamppost 102 is sent still has light penetration glass lamp shade 101 toward all directions irradiation, though the bulb 10 whole inside that are positioned at a projector, shell (not shown) by projector is coated, and should be unlikely to allow leakage of light come out; But for making the cooling of can dispelling the heat of high-power bulb 10, the cooling fan 12 that installs additional must have air outlet 11, to discharge the hot-air of cooling bulb 10, therefore one air outlet 11 is set in the leeward of bulb 10, and installs downward-sloping fence 111 additional, pass the light of lampshade 101 toward air outlet 11 to cover at air outlet 11 places, prevent that light from leaking outside, increase the windage of air outlet 11 on the contrary, hinder bulb 10 ambient air to flow out smoothly, so that reduce radiating efficiency; Therefore, fan 12 rotating speeds have to improve in existing projector, keeping the radiating efficiency that needs, yet increase noise thereupon and reduce life-span of fan 12; In addition, downward-sloping fence 111, the guiding hot-air directly blows to desktop, and desktop forms high temperature, causes the consumer to produce the whether doubt of safety.
Summary of the invention
The object of the present invention is to provide a kind of light-shielding structure of projecting camera light bulb, directly cover the light that exposes to air outlet, prevent that light from leaking, to improve the projected picture quality.
A purpose of the present invention is to provide a kind of light-shielding structure of projecting camera light bulb, and the width of cloth that can effectively cover bulb and sent is penetrated heat, thereby reduces the temperature of projector shell.
Another object of the present invention is to provide a kind of light-shielding structure of projecting camera light bulb, can reduce the windage of air outlet,, thereby increase radiating efficiency with the raising wind flow.
Another purpose of the present invention is to provide a kind of light-shielding structure of projecting camera light bulb, effectively lowers the thermal load of projector, reduces the operating temperature and the rotating speed of each part, to improve the life-span of product, reaches the noise that reduces projector.
The object of the present invention is achieved like this, and a kind of light-shielding structure of projecting camera light bulb promptly is provided, and comprising: a fan can produce an airflow; One bulb is arranged in this airflow; One air outlet is positioned at this bulb one side; And at least one anti-dazzling screen, between this bulb and air outlet, described at least one anti-dazzling screen comprises a preceding anti-dazzling screen that is positioned at this calm recirculating zone of bulb.
For reaching above-mentioned purpose, the present invention establishes anti-dazzling screen along lampshade, and with fan generation airflow, flow through and be similar to the bulb lampshade of cylinder and circular cone composition, form a calm recirculating zone at lee face, anti-dazzling screen before calm recirculating zone is provided with one respectively is provided with on one anti-dazzling screen and anti-dazzling screen once in the both sides up and down of lampshade; Before anti-dazzling screen, go up anti-dazzling screen and following anti-dazzling screen with bolt on the lamp bracket of bulb, the other end and lampshade keep a suitable distance, and along the profile of lampshade, a suitable distance is extended in rear end toward lampshade, with the high-brightness light that stops that lamppost sends, passes the light of lampshade toward air outlet, in order to avoid spill outside the projector, and bootable air-flow cooling lampshade, so air outlet can not need install the fence of inclination shading additional, to reduce the windage of air outlet.
Description of drawings
Fig. 1 is the bulb of existing projector and the relative position figure of air outlet;
Fig. 2 is the flow field simulation lab diagram of the bulb periphery of projector;
Fig. 3 is the Flow Field Distribution synoptic diagram of the bulb periphery of projector of the present invention;
Fig. 4 is the structural drawing of bulb light-shielding structure of the present invention;
Fig. 5 is the exploded view of bulb light-shielding structure of the present invention;
Fig. 6 is the flow field simulation lab diagram of the bulb periphery of projector of the present invention.
Embodiment
Relevant the present invention is for reaching above-mentioned purpose, and technological means that is adopted and effect thereof are lifted a preferred embodiment now, and cooperate graphic be illustrated as follows.
See also Fig. 2, for the flow field simulation of existing projecting camera light bulb periphery, wherein establish an air outlet 21 near projecting camera light bulb 20 sides, air outlet 21 also has a fence 211, places a cooling fan 22 at the opposite side of bulb 20.The lampshade 201 of approximate cylinder and bulb that circular cone constitutes 20, when the rotating speed of fan 22 rises to a fixed load, the air velocity distribution of fence 211 outlets of bulb 20 sides, on the both sides up and down that lampshade 201 does not stop, air velocity is kept the highest wind speed 4.55m/s, but the center of past more bulb 20 sides, air velocity is decreased to 0m/s gradually, and, obviously near the leeward center, side of bulb 20, form a calm recirculation zone (wake region) by the air velocity distribution in flow field.
As Fig. 3, Fig. 4 and shown in Figure 5, bulb 20 lampshades 201 of approximate cylinder and circular cone according to fairshaped Flow Field Distribution in the fluid mechanics principle, can form the calm recirculating zone 30 that an oblique hachure is represented at lee face.Because this calm recirculating zone 30 does not almost have air flow, therefore very little for the heat radiation influence of bulb 20, so the present invention is along lampshade 201 anti-dazzling screen 40 before this calm recirculating zone 30 is provided with, and in the upper and lower sides of lampshade 201 direction along air current flow, anti-dazzling screen 41 and anti-dazzling screen 42 once are set respectively in addition on one, by preceding anti-dazzling screen 40, last anti-dazzling screen 41 and following anti-dazzling screen 42, the high-brightness light that lamppost 202 is sent, when passing lampshade 201 toward air outlet 21, stopped with following anti-dazzling screen 42 by preceding anti-dazzling screen 40, last anti-dazzling screen 41, in order to avoid spill projector outward; Wherein, preceding anti-dazzling screen 40 utilizes bolt (not shown) to be fixed in lamp bracket 203 side end faces of bulb 20, and along the profile of lampshade 201, and keep a suitable spacing, a suitable distance is extended in rear end toward lampshade 201, to cover the light that leaks outside, wherein, the suitable distance that last anti-dazzling screen 41 extends toward the rear end of lampshade 201, cover lampshade 201, the width of cloth that bulb 20 sends can be penetrated heat and be covered, avoid the width of cloth to penetrate the upper casing (not shown) of heat conduction, avoid projector's upper casing (not shown) temperature to rise to projector.Last anti-dazzling screen 41 also utilizes bolt (not shown) to be fixed in lamp bracket 203 upper and lower end faces of bulb 20 with following anti-dazzling screen 42, and last anti-dazzling screen 41 and following anti-dazzling screen 42 are respectively along the profile of lampshade 201, also keep a suitable spacing, a suitable distance is extended in rear end toward lampshade 201, to cover the light that upper and lower sides leaks outside.In addition, preceding anti-dazzling screen 40, go up anti-dazzling screen 41, down anti-dazzling screen 42 respectively with lampshade 201 keeps a suitable spacing, by this spacing, bootable cooled gas flow is by spacing, to reach the effect of cooling off bulb 20.
In addition and since the present invention be provided with before anti-dazzling screen 40, and preceding anti-dazzling screen 40 is positioned at the leeward calm recirculating zone 30 of lampshade 201, the air-flow that is blown out for fan 22 can not impact, the cooling effectiveness of unlikely reduction bulb 20; Go up in addition anti-dazzling screen 41 and following anti-dazzling screen 42 direction along air flow line is set all, and it is overlapping with preceding anti-dazzling screen 40 two end portions respectively, to cover bulb 20 outer light leaks fully, and keep with preceding anti-dazzling screen 40 two ends, one distance and do not contact, not only reduce and hinder flowing of air, after around the more bootable air-flow cooling lampshade 201, again used heat is discharged via fence 211.Moreover, because preceding anti-dazzling screen 40, last anti-dazzling screen 41 and following anti-dazzling screen 42 can stop the light that lamppost 202 is launched.Therefore, the fence 211 that air outlet 21 of the present invention can not need tilt, and the fence 211 that can make air outlet 21 is followed the grain direction setting, to reduce the windage of air outlet 21, make air that fan 22 blows out through and cooling bulb 20 after, discharge smoothly outside the projector, therefore improve the cooling effectiveness of fan 22, and can suitably reduce the rotating speed of fan 22, reduce the noise of fan 22, reduce the heat load of projector simultaneously, reduce the working temperature of each part, increase the life-span of part, thereby guarantee the quality of product, in addition, the fence 211 of air outlet 21 is followed the grain direction setting, can directly not blow to desktop downwards yet, avoid putting the rising of the desktop temperature of projector.
Please continue referring to Fig. 6, it is the flow field simulation of projecting camera light bulb 20 peripheries of the present invention, and wherein the relative position of projecting camera light bulb 20, air outlet 21 and cooling fan 22 is roughly identical with the configuration of earlier figures 2.Discrepancy installs a preceding anti-dazzling screen 40 for the present invention additional before lampshade 201 contiguous fence 211, the upper and lower sides of lampshade 201 respectively installs on one anti-dazzling screen 41 and anti-dazzling screen 42 once additional, and with the fence 211 of air outlet 21 along the air flow line setting, when the rotating speed of fan 22 is increased to a fixed load, air velocity distribution in fence 211 outlets of bulb 20 sides, on the both sides up and down that lampshade 201 does not stop, air velocity rises to 4.93m/s, the center of past more bulb 20 sides, though air velocity descends, but it is quite a lot of that air velocity shown in Figure 2 relatively improves, and proves that obviously the present invention has the effect of improvement.
In like manner, though the opposite side that the embodiment of the invention is positioned at bulb 20 with fan 22 1 air outlets 21 as an illustration, fan 22 and air outlet 21 are positioned at the same side of bulb 20, also can know by inference easily to produce action effect of the present invention.
Above-described, only be that scope of the present invention is not limited to this each preferred embodiment, and is all according to any change that the present invention did, and not breaking away under the spirit of the present invention, all belongs to the scope of claim of the present invention in order to convenient explanation preferred embodiment of the present invention.
Claims (7)
1, a kind of light-shielding structure of projecting camera light bulb comprises:
One fan can produce an airflow;
One bulb is arranged in this airflow;
One air outlet is positioned at this bulb one side; And
At least one anti-dazzling screen, between this bulb and air outlet, described at least one anti-dazzling screen comprises a preceding anti-dazzling screen that is positioned at the leeward calm recirculating zone of this bulb.
2, the light-shielding structure of projecting camera light bulb as claimed in claim 1, wherein this bulb has a lamp bracket and lampshade, and this anti-dazzling screen is fixed on lamp bracket and extends to the bulb rear end along the profile of lampshade.
3, the light-shielding structure of projecting camera light bulb as claimed in claim 2, wherein this anti-dazzling screen and lampshade keep a spacing.
4, the light-shielding structure of projecting camera light bulb as claimed in claim 3, wherein this anti-dazzling screen comprises that also a last anti-dazzling screen and that is positioned at the bulb upside is positioned at the following anti-dazzling screen of bulb downside, anti-dazzling screen and this time anti-dazzling screen are along the direction setting of air flow on this.
5, the light-shielding structure of projecting camera light bulb as claimed in claim 4 wherein should be gone up anti-dazzling screen between bulb and upper casing, and cover bulb.
6, the light-shielding structure of projecting camera light bulb as claimed in claim 3, wherein this anti-dazzling screen also comprises anti-dazzling screen and following anti-dazzling screen, each anti-dazzling screen abutting end is overlapping and keep a spacing.
7, the light-shielding structure of projecting camera light bulb as claimed in claim 1, wherein this air outlet is provided with the fence along this airflow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021419620A CN100428050C (en) | 2002-08-29 | 2002-08-29 | Light shading structure of projector lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021419620A CN100428050C (en) | 2002-08-29 | 2002-08-29 | Light shading structure of projector lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1479162A CN1479162A (en) | 2004-03-03 |
| CN100428050C true CN100428050C (en) | 2008-10-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021419620A Expired - Lifetime CN100428050C (en) | 2002-08-29 | 2002-08-29 | Light shading structure of projector lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100428050C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113219719B (en) * | 2021-04-23 | 2023-06-30 | 成都京东方显示科技有限公司 | Backlight module, liquid crystal module and display device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5676442A (en) * | 1995-03-30 | 1997-10-14 | Seiko Epson Corporation | Projection display apparatus |
| EP0846973A2 (en) * | 1996-12-06 | 1998-06-10 | Hitachi, Ltd. | Light source device of liquid crystal projector |
| US5806952A (en) * | 1995-03-01 | 1998-09-15 | Seiko Epson Corporation | Projection type display device |
| US6089730A (en) * | 1997-10-27 | 2000-07-18 | Canon Kabushiki Kaisha | Illumination apparatus and projector |
| JP2001183746A (en) * | 1999-10-15 | 2001-07-06 | Sony Corp | Projection display device |
| CN1308248A (en) * | 2000-02-09 | 2001-08-15 | 索尼公司 | Projector and its cooling method |
-
2002
- 2002-08-29 CN CNB021419620A patent/CN100428050C/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5806952A (en) * | 1995-03-01 | 1998-09-15 | Seiko Epson Corporation | Projection type display device |
| US5676442A (en) * | 1995-03-30 | 1997-10-14 | Seiko Epson Corporation | Projection display apparatus |
| EP0846973A2 (en) * | 1996-12-06 | 1998-06-10 | Hitachi, Ltd. | Light source device of liquid crystal projector |
| US6089730A (en) * | 1997-10-27 | 2000-07-18 | Canon Kabushiki Kaisha | Illumination apparatus and projector |
| JP2001183746A (en) * | 1999-10-15 | 2001-07-06 | Sony Corp | Projection display device |
| CN1308248A (en) * | 2000-02-09 | 2001-08-15 | 索尼公司 | Projector and its cooling method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1479162A (en) | 2004-03-03 |
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Granted publication date: 20081022 |
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| CX01 | Expiry of patent term |