CN100428053C - Device and method for judging projector lamp residual service life of projector - Google Patents
Device and method for judging projector lamp residual service life of projector Download PDFInfo
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- CN100428053C CN100428053C CNB021418640A CN02141864A CN100428053C CN 100428053 C CN100428053 C CN 100428053C CN B021418640 A CNB021418640 A CN B021418640A CN 02141864 A CN02141864 A CN 02141864A CN 100428053 C CN100428053 C CN 100428053C
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- lamp
- remaining life
- voltage
- projecting lamp
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Abstract
The present invention relates to a device and a method for judging the remaining life of projector lamps of projectors. The method comprises the following steps: firstly, measuring lamp tube voltage between electrodes of a pair of filaments of a projector; converting the lamp tube voltage to a numerical value; calculating the remaining life of the projector according to the relationship between the lamp tube voltage and the remaining life of a lamp.
Description
Technical field
The present invention is about a kind of projector, particularly relevant for a kind of projector that can detect the projecting lamp remaining life, with and detection method.
Background technology
Projector handles the light beam that is penetrated by a light source with optical mode, to form an optical image, and utilize a projecting mirror (projection 1ens), amplify and throw described optical image, this kind projector by widely in interview, academic conference and fair as the usefulness of displaying.The light source of described projector uses a projecting lamp traditionally, for example a metal halid lamp or a helium lamp etc.
Under the situation of considering safety, or the service time of default projecting lamp safety, after this projecting lamp is mounted use, the light that can send quite stable continues hundreds of hours, for example 900 hours, if but projecting lamp when being used above itself serviceable life, projecting lamp will burn out, and projecting lamp may pop, and the user is caused danger.
Because this reason in traditional and commercially available projector, all is to use a timer to come the already used time of cumulative vote shot-light, when the time of accumulative total reaches the service time of predetermined safety, notifies the user need change the projection fluorescent tube.Yet just at last the projecting lamp of same type between, the difference (to1erance) that also has serviceable life exists, the projecting lamp of promptly representing same type, even if some lamp uses when surpassing intended life, also not necessarily burn out at once, also with the custom of using relation is arranged in addition, if the long-term projection of using high brightness, its serviceable life can be shorter, and use the projection of low-light level for a long time, serviceable life is longer, therefore, and when arriving intended life as if a foundation, change projecting lamp at once, and otherness on not considering the of every lamp own and using and user's custom can cause lamp still can use and just change in hundreds of hours, and caused unnecessary waste.
Because be installed in the projecting lamp of projector on the market, lamp as labels such as OSRAM, PHILIP or Ushio, identical characteristics are all arranged, be voltage identical as if use between the filament electrode of projecting lamp, the lightness meeting of lamp is along with increase and deepening service time, for keeping the identical brightness of projecting lamp, voltage between the filament electrode of need raising projecting lamp, so when projecting lamp normally uses, the voltage between the filament electrode of projecting lamp
Can be along with increasing service time and increasing.Therefore, the present invention by this characteristic change the preparation of lamp as the standard of judging the lamp life-span to inform the user.
Summary of the invention
In view of this, primary and foremost purpose of the present invention, be to provide a kind of method of differentiating the projecting lamp remaining life of projector, the method is to provide a projector to learn the remaining life of this projecting lamp by the voltage on the filament electrode that detects projecting lamp.
According to described purpose, the invention provides a kind of projector, comprise an image projection apparatus, it is provided with a projecting lamp, has a pair of filament electrode; One detecting unit is in order to detect this to the voltage between filament electrode; One analogue-to-digital converters are in order to become a digital value with this voltage transitions; And a control module, by relatively, calculate the remaining life of this projecting lamp with the table of comparisons of voltage relationship between the filament electrode of the residual life of this digital value and a recording lamp and lamp.
According to described purpose, the present invention also provides a kind of method of differentiating the projecting lamp remaining life of projector, comprises the voltage between a pair of filament electrode of measuring a projecting lamp; Change this voltage and become a digital value; And with the table of comparisons of voltage relationship between the filament electrode of the residual life of this digital value and a recording lamp and lamp relatively, to calculate the remaining life of this projecting lamp.
For described purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and conjunction with figs. are described in detail as follows:
Description of drawings
Fig. 1 is a synoptic diagram of differentiating projecting lamp residual life projector of the present invention.
Fig. 2 is the graph of a relation of light tube electric voltage and lamp residual life.
Fig. 3 illustrates the graph of a relation of the light tube electric voltage of lamp service time and lamp.
Fig. 4 is the process flow diagram of method of the remaining life of differentiation of the present invention projector lamp.
Symbol description
10: image projection apparatus; 12: projecting lamp;
13: ballast resistor; 14: detecting unit;
16: analog/digital converter; 18: control module;
20: storage unit; 22: timer;
121,122: filament electrode; 100: projector;
Va: light tube electric voltage.
Embodiment
As shown in fig. 1, it is a projector 100 of differentiating the residual life of projecting lamp of the present invention.Projector 100 comprises an image projection apparatus 10, is provided with a projecting lamp 12, has a pair of filament electrode 121,122; One detecting unit 14 in order to detect this voltage to 121,122 of filament electrodes, is commonly referred to as light tube electric voltage; One analogue-to-digital converters 16 are in order to become a digital value with this voltage transitions; And a control module 18, by relatively, calculate the remaining life of this projecting lamp 12 with this digital value and comparison list.
Wherein image projection apparatus 10, and the light beam that utilizes projecting lamp 12 to penetrate forming an optical image, and utilizes a projecting mirror (projection lens), amplify and throw described optical image.
In addition, described projecting lamp 12 can be a metal halid lamp or a helium lamp or the like ....Simultaneously, after this projecting lamp 12 was mounted use, the light that can send quite stable in the scope of safe handling time continued more than hundreds of hours for example 900-1100 hour.Moreover, this type of projecting lamp 12 has a characteristic, light tube electric voltage Va for 121,122 of the filament electrodes of projecting lamp 12 casts out high lightness because of keeping projecting lamp, and voltage Va can be along with increasing service time and increasing, expression filament interelectrode light tube electric voltage Va is all lower when projecting lamp 12 is brand-new, for example, the 60-85 volt, number increases during along with use, light tube electric voltage Va can little by little increase, approximately to the 115-120 volt to keep the lamp same brightness.Therefore, characteristic is changed the preparation of lamp as the standard of judging the lamp life-span to inform the user by this in the present invention, as shown in Figure 2, is the graph of a relation of light tube electric voltage and lamp residual life.
Detecting unit 14 is connected to 121,122 liang of voltage input ends of filament electrode, voltage sensor for example, in order to detection be added in filament electrode 121,122 between light tube electric voltage Va.In addition, projector 100 of the present invention also comprises a ballast resistor 13, be connected to the two ends of the filament electrode 121,122 of projecting lamp 12,, reach the startup that helps projecting lamp 12 in order to relax the variation of electric current in the projecting lamp 12, and a timer 22, the time of having used in order to record projecting lamp 12.
(analog-digital converter ADC), can convert the voltage or the current signal of simulation to equivalent digital signal, so that digital circuits such as microprocessor are handled to analogue-to-digital converters 16.In the present invention, analogue-to-digital converters 16 are in order to convert described light tube electric voltage Va (aanalogvoltage) to a digital value.
130 watts projecting lamp with OSRAM AC is an example, through repeatedly test, learn its life-span mostly above 1000 hours, what part was preferable reaches 1500 hours, but mostly in be added in filament electrode 121,122 between light tube electric voltage Va damage when being 110 volts of left and right sides, as shown in Figure 3.
Therefore in this embodiment, be a critical voltage value with 110 volts, when light tube electric voltage Va greater than 110 volts, this lamp should be changed immediately, to guarantee that the user uses this projector in the scope of safety, if this moment, light tube electric voltage Va was 105 volts, can make light tube electric voltage Va increase by 1 volt in about 3.3 hours and use, can calculate and learn that described projecting lamp 12 also has about 16 hours remaining lifes.For instance, can be shown in the data that cast out, informing the remaining life of user's projecting lamp 12, and described detection action is normally carried out when projector's 10 starts.
If the detecting unit 14 light tube electric voltage Va that detects surpasses 110 volts or during near 110 volts, or remaining life is less than one both regularly during number, for example 5 hours the time, then export a caution signal, for example be shown in the optical image that casts out, must change projecting lamp 12 immediately to inform the user.If the user does not change projecting lamp immediately, 18 of control modules start timer 22 simultaneously after projector opens, use a schedule time in timer 22, for example automatically projector are shut down after 5 minutes, cause danger in order to avoid light tube electric voltage continues to increase.
As shown in Figure 4, be the process flow diagram of the method for the remaining life of differentiation of the present invention projector lamp.
At first in step 11, when projector's 100 starts, detecting unit 14 can measure be added in filament electrode 121,122 between light tube electric voltage Va, or the projecting lamp 12 of measuring earlier this projector time of having used, if the projecting lamp of projector 12 has used and reached one and both regularly reached one during number both regularly during number, carry out next step.
Then in step 13, utilize analogue-to-digital converters 16, the light tube electric voltage Va with measured converts a digital value to.
At last, in step 15, utilize control module 18 writing down the table of comparisons of relation of the residual life of light tube electric voltage between filament electrode and lamp according to described digital value and, calculate the remaining life of projecting lamp 12, simultaneously, the remaining life that shows described projecting lamp, for instance, in the image that can be shown in projector simultaneously and throwed away.In addition, when the remaining life of this projecting lamp 12 was less than a pre-regularly number, control module was exported a caution signal, informs that the user changes projecting lamp.
Though the present invention with preferred embodiment openly as above; right its is not that any those skilled in the art are under the situation that does not break away from the spirit and scope of the present invention in order to restriction the present invention; can change and improvement, so the scope that the claim that protection scope of the present invention proposed defines is as the criterion.
Claims (9)
1. a projector has the function of the residual life of differentiating projecting lamp, comprising:
One projecting lamp, this projecting lamp has a pair of filament electrode;
One detecting unit is in order to detect this to the magnitude of voltage between filament electrode;
One analogue-to-digital converters are in order to convert this magnitude of voltage to a digital value; And
One control module receives this digital value, and utilizes comparison list, by with the table of comparisons of voltage relationship between the filament electrode of the residual life of this digital value and a recording lamp and lamp relatively, calculates the remaining life of this projecting lamp.
2. projector as claimed in claim 1 also comprises a storage unit, in order to store this table of comparisons.
3. projector as claimed in claim 1, wherein this control module is exported a caution signal when when this remaining life is lower than a default value.
4. projector as claimed in claim 3 also comprises a timer, and this timer picks up counting a schedule time after projector starts, and service time of this projector was defined in this schedule time.
5. projector as claimed in claim 1, wherein for to keep the certain brightness of this projecting lamp, this projecting lamp has the characteristic that the voltage between filament electrode increased along with service time.
6. method of differentiating the remaining life of projector's lamp comprises:
Measure the voltage between a pair of filament electrode of projector's lamp;
Change this voltage and become a digital value; And
With the table of comparisons of voltage relationship between the filament electrode of the residual life of this digital value and a recording lamp and lamp relatively, to calculate the remaining life of this projector's lamp.
7. the method for differentiating the remaining life of projector's lamp as claimed in claim 6 also comprises a step:
The remaining life that shows this projector's lamp.
8. the method for differentiating the remaining life of projector's lamp as claimed in claim 6 also comprises when the remaining life of this projector's lamp is less than a predetermined value, exports a caution signal.
9. the method for the remaining life of differentiation as claimed in claim 8 projector lamp also is included in projector's one schedule time of timing when starting, with projector use time qualified in this schedule time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021418640A CN100428053C (en) | 2002-08-27 | 2002-08-27 | Device and method for judging projector lamp residual service life of projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021418640A CN100428053C (en) | 2002-08-27 | 2002-08-27 | Device and method for judging projector lamp residual service life of projector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1479163A CN1479163A (en) | 2004-03-03 |
| CN100428053C true CN100428053C (en) | 2008-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021418640A Expired - Fee Related CN100428053C (en) | 2002-08-27 | 2002-08-27 | Device and method for judging projector lamp residual service life of projector |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6699189B2 (en) * | 2016-01-19 | 2020-05-27 | セイコーエプソン株式会社 | Projector and projector control method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5132594A (en) * | 1988-05-19 | 1992-07-21 | Nilssen Ole K | Longer-life incandescent lamp |
| JPH0878173A (en) * | 1994-09-07 | 1996-03-22 | Hitachi Lighting Ltd | Discharge lamp lighting device |
| JPH09320781A (en) * | 1996-05-30 | 1997-12-12 | Toshiba Lighting & Technol Corp | High-pressure discharge lamp-lighting device and image display device |
| JP2000315591A (en) * | 1999-05-06 | 2000-11-14 | Hitachi Ltd | Lamp life judging device |
| CN1284832A (en) * | 1999-08-07 | 2001-02-21 | 皇家菲利浦电子有限公司 | Method and device for detecting gas discharge lamp |
| JP2002083697A (en) * | 2000-09-06 | 2002-03-22 | Matsushita Electric Works Ltd | Electric discharge lamp lighting equipment |
-
2002
- 2002-08-27 CN CNB021418640A patent/CN100428053C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5132594A (en) * | 1988-05-19 | 1992-07-21 | Nilssen Ole K | Longer-life incandescent lamp |
| JPH0878173A (en) * | 1994-09-07 | 1996-03-22 | Hitachi Lighting Ltd | Discharge lamp lighting device |
| JPH09320781A (en) * | 1996-05-30 | 1997-12-12 | Toshiba Lighting & Technol Corp | High-pressure discharge lamp-lighting device and image display device |
| JP2000315591A (en) * | 1999-05-06 | 2000-11-14 | Hitachi Ltd | Lamp life judging device |
| CN1284832A (en) * | 1999-08-07 | 2001-02-21 | 皇家菲利浦电子有限公司 | Method and device for detecting gas discharge lamp |
| JP2002083697A (en) * | 2000-09-06 | 2002-03-22 | Matsushita Electric Works Ltd | Electric discharge lamp lighting equipment |
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| Publication number | Publication date |
|---|---|
| CN1479163A (en) | 2004-03-03 |
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Owner name: CHINA NATIONAL HEAVY DUTY TRUCK GROUP JINAN POWER Free format text: FORMER OWNER: JINAN TECH CENTER CO., LTD., CHINA HEAVY TRUCK GROUP Effective date: 20101027 |
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Address after: China Taiwan Taoyuan County Patentee after: Qisda Corporation Address before: China Taiwan Taoyuan County Patentee before: Benq Corp. |
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Granted publication date: 20081022 Termination date: 20160827 |