CN102540669A - Projector and color wheel positioning device - Google Patents
Projector and color wheel positioning device Download PDFInfo
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- CN102540669A CN102540669A CN2012100297610A CN201210029761A CN102540669A CN 102540669 A CN102540669 A CN 102540669A CN 2012100297610 A CN2012100297610 A CN 2012100297610A CN 201210029761 A CN201210029761 A CN 201210029761A CN 102540669 A CN102540669 A CN 102540669A
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- colour wheel
- coil
- projector
- locating device
- color wheel
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Abstract
The invention relates to a projector and a color wheel positioning device. A color wheel comprises an optical filter group; and the color wheel positioning device comprises a motor, a magnetic unit, a coil and a processing unit, wherein the motor is used for driving the color wheel to rotate; the magnetic unit is arranged on the color wheel, and synchronously circumferentially rotates with the color wheel when the color wheel rotates; the coil is correspondingly arranged on one side of a rotating track of the magnetic unit; the processing unit is coupled with the coil; and when the magnetic unit approaches the coil, the coil generates a signal and transmits the signal to the processing unit and the processing unit judges the positions of a plurality of optical filters in different colors according to the signal. The color wheel positioning device is used for positioning the optical filters in the color wheel.
Description
[technical field]
The present invention is about a kind of colour wheel locating device of projector, and particularly, the present invention is about a kind of projector of tool colour wheel positioning function.
[background technology]
See also Fig. 1, the colour wheel locating device 1 of convention projector, its device include a colour wheel 10, and colour wheel 10 comprises the optical filter (for example R, G, B) of a plurality of different colours, to filter light source, produce coloured light; One motor 12 drives this colour wheel and rotates; One sensing cell 14, it launches unidirectional signal 15 (for example light), and receives the unidirectional signal that is reflected; One clock pulse mark 16 for example for reflecting the colour band of unidirectional signal, is arranged on the sidepiece of rotating shaft 18; The unidirectional signal of sensing cell 14 emissions is in the sidepiece of the axial region 18 of colour wheel 10; Unidirectional signal 15 can intersect with the rotation approach of clock pulse mark 16 during the colour wheel rotation; Clock pulse mark 16 is after receiving unidirectional signal; Sensing cell 14 can't produce the unidirectional signal of reflection, so that can't receive the unidirectional signal of reflection.
Hold above-mentionedly, the localization method of this colour wheel locating device is detected the clock pulse mark 16 on the colour wheel 10 to launch unidirectional signal; Continue the unidirectional signal that detecting colour wheel 10 is reflected; When unidirectional signal is emitted to the clock pulse mark, unidirectional signal can't reflect, and sensing cell 14 can't receive the unidirectional signal of reflection; Processing unit 19 just can be known colour wheel 10 turned positions this moment according to the sensing result of sensing cell, and then can confirm the current location of all optical filters.
[summary of the invention]
The object of the present invention is to provide a kind of colour wheel locating device of projector, this colour wheel comprises a filter set, and this filter set comprises the optical filter of a plurality of different colours; The colour wheel locating device also comprises: motor, rotate in order to drive this colour wheel; Magnet unit is arranged on this colour wheel, and when this colour wheel rotated, this magnet unit and this colour wheel were circumference synchronously and rotate; Coil, this coil is to a side setting of rotary motion trace that should magnet unit; And processing unit, couple this coil; Wherein, when this magnet unit during near this coil, this coil produces a signal to this processing unit, and this processing unit is judged the position of the optical filter of these a plurality of different colours according to this signal.
As further optional technical scheme, the colour wheel locating device of described projector is characterized in that more comprising amplifier, and it couples this coil, exports this processing unit again in order to this signal is amplified.
As further optional technical scheme, this signal is an induction electromotive force.
As further optional technical scheme, the colour wheel locating device of described projector is characterized in that this colour wheel more wraps axial region, and this magnet unit is arranged on the sidewall of this axial region.
As further optional technical scheme, this magnet unit is arranged on the optical filter.
As further optional technical scheme, this coil need not be external to a power supply.
The present invention also aims to provide a kind of projector, it comprises above-mentioned a kind of colour wheel locating device.
Compared with prior art, benefit of the present invention is can not receive the interference of the inner spurious rays of projector, can judge the residing position of each optical filter of colour wheel more accurately.
[description of drawings]
Fig. 1 is the synoptic diagram of the colour wheel locating device 1 of convention projector;
The synoptic diagram of the colour wheel locating device 2 of the projector of Fig. 2 one embodiment of the invention;
Fig. 3 is the signal synoptic diagram of the coil of an embodiment of the present invention;
[embodiment]
Fundamental purpose of the present invention is to provide a kind of colour wheel locating device of projector, its utilize coil near or produce induction electromotive force away from magnet unit and change, the position that colour wheel forwards to is detected, with location the different colours optical filter of colour wheel.Below propose various embodiment and be elaborated, embodiment in order to as the example explanation, is not the scope in order to limit desire protection of the present invention only.
At first, see also Fig. 2, be the structural representation of a preferred embodiment of the present invention; As shown in the figure, colour wheel locating device 2 of the present invention includes colour wheel 20, magnetic strength measurement unit, magnet unit 23 and motor 24.
Colour wheel 21 comprises filter set, and filter set comprises R, G, B at least 3 tablet filters.Filter set 211 comprises that the fan-shaped optical filter of a plurality of different colours has Red lightscreening plate R, green color filter G and blue color filter B; Optical filter quantity and color category are also unrestricted, the coloured light that filter set 211 is used to receive the light (not shown) of light source generation and isolates a plurality of colors.Colour wheel 21 comprises axial region 212, axial region 212 and optical filter interlock.Motor 24 is used to drive axial region 212 rotations to drive filter set 211 rotations.In present embodiment, axial region 212 gabarits for example are a column structure, and magnet unit 23 is arranged at the sidewall of axial region 212.The magnetic strength measurement unit comprises coil 221 and amplifier 222, the magnetic field that coil 221 is produced in order to sensing magnet unit 23, and in the present embodiment, when magnet unit 23 is arranged at the sidewall of axial region, coil 221 is also in the face of the sidewall setting of axial region.
Be appreciated that ground, in other embodiments, magnet unit 23 also possibly be arranged on the front or the back side of a tablet filter with the mode of pasting.When magnet unit 23 was arranged at optical filter positive, positive the place ahead and coil 221 that the magnetic strength measurement unit is arranged at filter set were provided with in the face of magnet unit 23; When magnet unit 23 was arranged at the back side of filter set 211, rear, the back side and coil 221 that magnetic strength measurement unit 22 is arranged at filter set 211 were provided with in the face of magnet unit 23.
Processing unit 26 electrically connects with the magnetic strength measurement unit; Be used to receive the turned position situation that the magnetic strength measurement unit is passed on the filter set of coming; Because; The position between each colo(u)r filter of the filter set of colour wheel 20 and the position of magnet unit 23 distribute in advance, and processing unit 26 knows that the position of magnet unit 23 goes out the current location of whole filter set with regard to deducibility.If be aided with the rotating speed of colour wheel again, just can derive certain turned position of filter set constantly.The rotating speed of colour wheel is as long as the position of periodic statistics magnet unit 23 just can draw.So, processing unit 26 switches the opportunity of each color accurately.Make that sequential is synchronous between processing unit 26 and the filter set 211.
Be described in detail principle of work of the present invention below; As shown in Figure 2, when rotating, motor 24 drives axial region 212 and filter set is rotated synchronously, and magnet unit is 23 periodically approaching/away from magnetic strength measurement unit 22; Magnetic strength measurement unit 22 produces physical change; With the location of each optical filter of confirming colour wheel 20, and magnetic strength measurement unit 22 preferred application are coil 221, further specify; (present embodiment is with magnetic N example very when magnet unit 23; Other are for example: the magnet or the magnetic S utmost point also possibly reached) during through coil, induction electromotive force equals the variable quantity of the magnetic flux phi B of coil 221, and formula is that
is as shown in Figure 3; When induction electromotive force ε changes; Be that coil 221 produces signal to processing unit 26, processing unit 26 is just known filter set 211 turned positions this moment, in order to confirm the reference position of all colours.In this embodiment, magnetic strength measurement unit 22 more can further comprise amplifier 222, and it couples coil 221, converts voltage V among Fig. 3 in order to induction electromotive force ε.The square wave form, to reduce the chance that erroneous judgement takes place processing unit 26.
Supplementary notes, magnet unit is 23 approaching/promptly produces induction electromotive force away from coil 221 to change, therefore, sensing cell 22 need not be external to power supply, can detect the turned position of each optical filter of colour wheel 20.In addition, sensing cell 22 does not send does not detect light yet, therefore can not receive the interference of the inner spurious rays of projector, influences the judgement of sensing cell to the colour wheel turned position.
Though the present invention discloses as above with embodiment, so it is not that protection scope of the present invention is when being as the criterion with claims in order to qualification the present invention.
Claims (7)
1. the colour wheel locating device of a projector, this colour wheel has the optical filter of a plurality of different colours, it is characterized in that this colour wheel locating device comprises:
Motor rotates in order to drive this colour wheel;
Magnet unit is arranged on this colour wheel, and when this colour wheel rotated, this magnet unit and this colour wheel were circumference synchronously and rotate;
Coil, this coil is to a side setting of rotary motion trace that should magnet unit; And
Processing unit couples this coil;
Wherein, when this magnet unit during near this coil, this coil produces a signal to this processing unit, and this processing unit is judged the position of the optical filter of these a plurality of different colours according to this signal.
2. the colour wheel locating device of projector as claimed in claim 1 is characterized in that more comprising an amplifier, and it couples this coil, exports this processing unit again in order to this signal is amplified.
3. the colour wheel locating device of projector as claimed in claim 1 is characterized in that this signal is an induction electromotive force.
4. the colour wheel locating device of projector as claimed in claim 1 is characterized in that this colour wheel comprises axial region, and this magnet unit is arranged on the sidewall of this axial region.
5. the colour wheel locating device of projector as claimed in claim 1 is characterized in that this magnet unit is arranged on this optical filter.
6. the colour wheel locating device of projector as claimed in claim 1 is characterized in that this coil does not have external power supply.
7. projection arrangement is characterized in that comprising like any described colour wheel locating device in the claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100297610A CN102540669A (en) | 2012-02-10 | 2012-02-10 | Projector and color wheel positioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100297610A CN102540669A (en) | 2012-02-10 | 2012-02-10 | Projector and color wheel positioning device |
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| Publication Number | Publication Date |
|---|---|
| CN102540669A true CN102540669A (en) | 2012-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100297610A Pending CN102540669A (en) | 2012-02-10 | 2012-02-10 | Projector and color wheel positioning device |
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| CN (1) | CN102540669A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104010175A (en) * | 2014-05-21 | 2014-08-27 | 明基电通有限公司 | Projecting device with color wheel locking function and color wheel locking method |
| CN104199248A (en) * | 2014-08-29 | 2014-12-10 | 苏州佳世达光电有限公司 | Projector |
| CN108828886A (en) * | 2018-05-29 | 2018-11-16 | 苏州佳世达光电有限公司 | Colour wheel detecting phase method and the projector for applying it |
| CN110578907A (en) * | 2018-06-08 | 2019-12-17 | 佛山市威得士灯饰电器有限公司 | Light color changeable lamp and automatic positioning device thereof |
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| US20050189479A1 (en) * | 2004-02-26 | 2005-09-01 | Wen-Wei Su | Detecting device for detecting the rotation of a motor rotor |
| CN101040165A (en) * | 2004-03-08 | 2007-09-19 | G·勃兰特·泰勒 | Induction sensor |
| CN101231451A (en) * | 2007-01-25 | 2008-07-30 | 明基电通股份有限公司 | Six-segment color wheel |
| CN101339352A (en) * | 2007-07-02 | 2009-01-07 | 中强光电股份有限公司 | Color wheel module and projection device possessing same |
| CN201220239Y (en) * | 2008-06-20 | 2009-04-15 | 湖州职业技术学院 | Localization detection device of steel wire production line high temperature laying port |
| CN102096165A (en) * | 2010-12-21 | 2011-06-15 | 明基电通有限公司 | Color wheel motor, color wheel module and projection device |
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2012
- 2012-02-10 CN CN2012100297610A patent/CN102540669A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050189479A1 (en) * | 2004-02-26 | 2005-09-01 | Wen-Wei Su | Detecting device for detecting the rotation of a motor rotor |
| CN101040165A (en) * | 2004-03-08 | 2007-09-19 | G·勃兰特·泰勒 | Induction sensor |
| CN101231451A (en) * | 2007-01-25 | 2008-07-30 | 明基电通股份有限公司 | Six-segment color wheel |
| CN101339352A (en) * | 2007-07-02 | 2009-01-07 | 中强光电股份有限公司 | Color wheel module and projection device possessing same |
| CN201220239Y (en) * | 2008-06-20 | 2009-04-15 | 湖州职业技术学院 | Localization detection device of steel wire production line high temperature laying port |
| CN102096165A (en) * | 2010-12-21 | 2011-06-15 | 明基电通有限公司 | Color wheel motor, color wheel module and projection device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104010175A (en) * | 2014-05-21 | 2014-08-27 | 明基电通有限公司 | Projecting device with color wheel locking function and color wheel locking method |
| CN104010175B (en) * | 2014-05-21 | 2016-01-20 | 明基电通有限公司 | The projection arrangement of tool colour wheel lock function and colour wheel locking means |
| CN104199248A (en) * | 2014-08-29 | 2014-12-10 | 苏州佳世达光电有限公司 | Projector |
| CN108828886A (en) * | 2018-05-29 | 2018-11-16 | 苏州佳世达光电有限公司 | Colour wheel detecting phase method and the projector for applying it |
| CN110578907A (en) * | 2018-06-08 | 2019-12-17 | 佛山市威得士灯饰电器有限公司 | Light color changeable lamp and automatic positioning device thereof |
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Application publication date: 20120704 |