WO2018072636A1

WO2018072636A1 - Projection system

Info

Publication number: WO2018072636A1
Application number: PCT/CN2017/105802
Authority: WO
Inventors: 罗伟欢; 陈红运; 李屹
Original assignee: 深圳市光峰光电技术有限公司
Priority date: 2016-10-20
Filing date: 2017-10-12
Publication date: 2018-04-26
Also published as: CN206178330U

Abstract

A projection system comprises a fluorescent wheel (02), a filter wheel (05), and a control device (08). A first mark (03) is arranged on the surface of the fluorescent wheel (02), and a second mark (06) is arranged on the surface of the filter wheel (05). The projection system also comprises a first sensor (04) and a second sensor (07) disposed respectively relative to the first mark (03) and the second mark (06). After the fluorescent wheel (02) starts to rotate, the first sensor (04) detects the first mark (03), and generates a first jump level signal after the first sensor (04) detects the first mark (03) for the first time. After the filter wheel (05) starts to rotate, the second sensor (07) detects the second mark (06), and generates a second jump level signal after the second sensor (07) detects the second mark (06) for the first time. The control device (08) adjusts the rotation speed of the fluorescent wheel (02) and/or the filter wheel (05) according to a time difference between the first jump level signal and the second jump level signal. The projection system can improve the rotation synchronization between the filter wheel (05) and the fluorescent wheel (02), improve the brightness and the definition of a projected image and improve the data processing speed.

Description

Projection system

[0001] The present invention relates to the field of projection display technology, and more particularly to a projection system.

Background technique

[0002] At present, laser projection is widely used in the fields of laser television, micro-projection, cinema machine, engineering machine and wall. In prior art projection systems, the excitation light generated by the solid state light source is typically used to excite the fluorescent wheel to produce a colored light sequence. Wherein, different color segments of the fluorescent color wheel are respectively provided with different fluorescent materials, and different color segments of the fluorescent color wheel are alternately and periodically arranged on the propagation path of the excitation light, and then the excitation color is used to excite the fluorescent color wheel. Fluorescent materials on different color segments to produce fluorescence of different colors. In addition, due to the wide spectral range produced by the fluorescent material, the color purity of the partial fluorescence is insufficient, which leads to the color gamut of the light source is not large enough. It is necessary to filter the fluorescence through the filter, and provide different filtering for different colors of fluorescence. sheet. A plurality of filters capable of filtering different colors are formed into a filter wheel, and the filter wheel is disposed in a filter area corresponding to the color section of the fluorescent wheel, and the fluorescent wheel rotates in synchronization with the filter wheel. In the laser projection device using the structure, the excitation light emitted from the excitation light source is irradiated onto the color filter wheel, and the light reflected or refracted from the color filter wheel is guided to the fluorescent wheel through the optical element, thereby obtaining a clear image quality. Projection screen.

technical problem

[0003] However, since the fluorescent wheel and the filter wheel are respectively driven by separate motors, after the synchronous start drive or the stop drive is performed, or after the long turn is used, the filter wheel and the fluorescent wheel are rotationally asynchronous in the work 吋. The problem is that the obtained picture is blurred, the color is confusing, and the brightness of the light is low. At the same time, in the application of the laser projection device to the projection system, the color signal and the color of the filter wheel are not uniform, which causes the image display to be misaligned. In the prior art, in the prior art, after adjusting the filter wheel and the fluorescent wheel to rotate synchronously, a large amount of data needs to be collected for analysis, resulting in high configuration requirements for the processor and slow data processing.

[0004] Therefore, how to ensure the synchronous rotation of the color filter wheel and the fluorescent wheel in the projection system and increase the data processing speed are technical problems that those skilled in the art urgently need to solve. Problem solution

Technical solution

In order to solve the above technical problem, the present invention provides a projection system, which can not only effectively improve the synchronization of the filter wheel and the fluorescent wheel in the projection system, but also improve the brightness and definition of the projected image, and avoid color misalignment. More importantly, it can increase the speed of data processing and speed up the adjustment of the filter wheel and the fluorescent wheel.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A projection system includes a fluorescent wheel and a filter wheel, a surface of the fluorescent wheel is provided with a first mark, a surface of the filter wheel is provided with a second mark, and the projection system further includes a first sensor, a second a sensor and a control device, the first sensor is disposed opposite to the first mark; the second sensor is disposed opposite to the second mark; the control device is electrically connected to the first sensor and the second sensor, respectively, wherein:

[0008] the first sensor detects the first mark after the fluorescent wheel starts rotating, and generates a first jump level signal when the first mark is detected for the first time, and the Transmitting a first hopping level signal to the control device;

[0009] the second sensor detects the second mark after the filter wheel starts rotating, and generates a second jump level signal after detecting the second mark for the first time, and Transmitting the second hopping level signal to the control device;

[0010] The control device adjusts a rotational speed of the fluorescent wheel and/or the filter wheel according to the inter-turn difference between the first hopping level signal and the second hopping level signal.

[0011] Preferably, the control device comprises a data processor and a speed adjuster, wherein:

[0012] the data processor calculates a diurnal difference between the first hopping level signal and the second hopping level signal

And sending a control signal to the speed adjuster when the inter-turn difference exceeds a threshold range 及; and the speed adjuster adjusts a rotational speed of the fluorescent wheel and/or the filter wheel according to the control signal.

[0013] Preferably, the projection system further comprises a reflective element, the reflective element receives the sequence light emitted by the filter wheel, and reflects the sequence light onto the spatial light modulator.

[0014] Preferably, the data processor receives a control signal to the speed adjuster after the color control signal received on the spatial light modulator is out of synchronization with the sequence light emitted by the filter wheel;

[0015] the speed adjuster adjusts a rotation speed of the filter wheel according to the control signal so that the filter wheel is emitted The sequence light is synchronized with the color control signal, and the rotation speed of the fluorescent wheel is adjusted such that the fluorescent wheel rotates synchronously with the filter wheel.

[0016] Preferably, in the above projection system, the first mark and the second mark are black tape and/or fluorescent mark.

[0017] The present disclosure further provides a projection system, including a fluorescent wheel and a filter wheel, the surface of the fluorescent wheel is provided with a first mark, the surface of the filter wheel is provided with a second mark, and the projection system further includes a sensor, a second sensor, and a control device, wherein the first sensor is disposed opposite to the first mark; the second sensor is disposed opposite to the second mark; and the control device is electrically connected to the first sensor and the second sensor, respectively Connection, where:

[0018] the first sensor detects the first mark every predetermined length after the fluorescent wheel starts rotating, and detects the first mark for the first time every the preset length吋 generating a first hopping level signal;

[0019] the second sensor detects the second mark every the preset length after the filter wheel starts rotating, and detects the first time every the preset length The second marker 吋 generates a second hopping level signal, wherein the predetermined 吋 length is greater than a rotation period of the fluorescent wheel and the filter wheel;

And [0020] the control device adjusts a rotation speed of the fluorescent wheel and/or the filter wheel according to the inter-turn difference between the first hopping level signal and the second hopping level signal.

Advantageous effects of the invention

Beneficial effect

[0021] Since the present invention only needs to perform one detection after the fluorescent wheel or the filter wheel starts rotating or every other preset length, the preset preset length is greater than the rotation of the fluorescent wheel and the filter wheel. The cycle, therefore, greatly reduces the processing data of the control device, increases the data processing speed, simplifies the data processing steps, reduces the data processing capability requirements of the control device, and reduces the cost.

Brief description of the drawing

DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art description will be briefly described below, and obviously, in the following description The drawings are merely examples of the present invention, and those skilled in the art can obtain other drawings according to the drawings provided without any creative work. 1 is a schematic structural diagram of a projection system according to an embodiment of the present invention;

2 is a schematic structural diagram of a projection system according to another embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, instead of All embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts are within the scope of the present invention.

Please refer to FIG. 1, which is a schematic structural diagram of a projection system according to an embodiment of the present invention.

[0027] In the projection system, a laser light source 01 and various optical elements such as a dichroic sheet, a reflective element, and the like are included. The excitation light emitted from the laser light source 01 is irradiated to the periodically rotating fluorescent wheel 02 through the optical element, and generates a laser light. The laser light passes through a series of optical elements and finally enters the filter wheel 05 which rotates in synchronization with the fluorescent wheel 02. The light wheel 05 is provided with a filter area corresponding to the color section of the fluorescent wheel 02 to filter the order light.

[0028] However, the existing projection system needs to collect a large amount of data during the synchronization process of the fluorescent wheel and the filter wheel, resulting in slow data processing. In order to ensure the data processing speed, people start to adopt a processor with high performance and processing speed. However, the cost of such a processor is generally high. Therefore, the present embodiment is correspondingly improved in response to the above problems, and the improved projection system mainly includes:

[0029] a first mark 03, disposed on a surface of the fluorescent wheel 02;

[0030] A second mark 06 is disposed on a surface of the filter wheel 05. The first mark 03 and the second mark 06 are black tape and/or fluorescent marks.

[0031] The first sensor 04 is disposed relative to the first mark 03. In order to facilitate the sensor to irradiate the probe light to the mark surface, the jump level signal is effectively captured, and the first sensor 04 and the first mark 03 are disposed on the fluorescent wheel 02. The same side. The first sensor 04 may be disposed directly above the first mark 03 or other position at which the first mark 03 can be sensed.

[0032] The first sensor 04 detects the first mark 03 after the fluorescent wheel 02 starts rotating, and generates a first jump level signal after detecting the first mark 03 for the first time; And the first transition level letter The number is transmitted to the control device 08.

[0033] The second sensor 07 is disposed relative to the second mark 06, and in order to facilitate the sensor to irradiate the probe light to the mark surface, the jump level signal is effectively captured, and the second sensor 07 and the second mark 06 are disposed at the filter The same side of the light wheel 05. The second sensor 07 can be disposed directly above the second indicium 06 or other location at which the second indicium 06 can be sensed.

[0034] The second sensor 07 detects the second mark 06 after the filter wheel 05 starts rotating, and generates a second jump level signal after detecting the second mark 06 for the first time. . The second sensor 07 and the second mark 06 are disposed on the same side of the filter wheel 05, and transmit the second hop level signal to the control device 08.

[0035] The control device 08 is electrically connected to the first sensor 04 and the second sensor 07, respectively, and the control device 08 adjusts fluorescence according to the first hopping level signal and the second hopping signal 吋 difference The rotational speed of the wheel and/or the filter wheel is such that the fluorescent wheel 02 rotates synchronously with the filter wheel 05. Specifically, the control device 08 determines whether the fluorescent wheel 02 and the filter wheel 05 rotate synchronously according to the inter-turn difference between the first hopping level signal and the second hopping level signal. If the fluorescent wheel 02 and the filter wheel 05 do not rotate synchronously, the rotation speed of the fluorescent wheel 02 and/or the filter wheel 05 is adjusted such that the fluorescent wheel 0 2 is synchronized with the filter wheel 05. Rotate.

[0036] Preferably, in order to facilitate the first sensor 04 and the second sensor 07 to conveniently detect the rotated first mark 03 and the second mark 06, between the first mark 03 and the rotating shaft of the fluorescent wheel 02 The distance between the second mark 06 and the rotating shaft of the filter wheel 05 is greater than zero.

[0037] Specifically, the control device 08 includes a data processor and a speed adjuster, where:

[0038] the data processor calculates a 吋 difference between the first hopping level signal and the second hopping level signal, and sends a control signal when the 吋 difference exceeds a preset threshold range 吋To the speed adjuster; and the speed adjuster adjusts a rotation speed of the fluorescent wheel and/or the filter wheel according to the control signal

[0039] Preferably, the data processor calculates that the inter-turn difference between the first hopping level signal and the second hopping level signal is within a threshold range, and determines the fluorescent wheel and the filter The light wheel rotates synchronously, and when the difference between the first hopping level signal and the second hopping level signal exceeds the threshold range 吋, determining that the fluorescent wheel and the filter wheel are not synchronously rotated . [0040] Since the first mark 03 and the second mark 06 are respectively detected once after the fluorescent wheel 02 or the filter wheel 05 is rotated, the data obtained at one time is used as the control device. Processing the data greatly reduces the processing data of the control device 08, thereby increasing the data processing speed, simplifying the data processing steps, reducing the data processing capability of the control device 08, and reducing the cost.

[0041] In order to make the detection manners of the first sensor and the second sensor more diverse, in another embodiment, the first sensor 04 may also be preset every time after the fluorescent wheel 02 is rotated. Detecting the first mark, and detecting the first mark 03 for the first time every predetermined length, generating a first hopping level signal, and the first hopping level signal Transfer to control unit 08.

[0042] the second sensor 07 may further detect the second mark 06 every the preset length after the filter wheel 05 is rotated, and at the preset length The second flag 06吋 is detected to generate a second hopping level signal, wherein the preset 吋 length is greater than a rotation period of the fluorescent wheel 02 and the filter wheel 05; The length can be set according to actual needs, for example, the preset length is set to be 2 times, 3 times, etc. of the rotation period of the fluorescent wheel or the filter wheel.

[0043] The control device 08 adjusts the rotation speed of the fluorescent wheel 02 and/or the filter wheel 05 according to the inter-turn difference between the first hopping level signal and the second hopping level signal. The fluorescent wheel 02 is rotated in synchronization with the filter wheel 05.

[0044] Specifically, the control device 08 includes a data processor and a speed adjuster, where:

[0045] a data processor, configured to: when the first hop level signal and the second hop level signal have a 吋 difference within a threshold range, determine the fluorescent wheel and the filter wheel Synchronously rotating, determining that the fluorescent wheel and the filter wheel are not synchronously rotated when a difference between the first hopping level signal and the second hopping level signal exceeds the threshold range ;;

a speed adjuster, configured to: when the data processor determines that the fluorescent wheel and the filter wheel are not synchronized with each other, adjust a rotation speed of the fluorescent wheel and/or the filter wheel, so that The fluorescent wheel rotates synchronously with the filter wheel.

[0047] In this embodiment, since the first mark 03 and the second mark 06 are respectively detected multiple times every predetermined length after the fluorescent wheel 02 or the filter wheel 05 is rotated, each time The detected interval is larger than the rotation period of the fluorescent wheel 02 or the filter wheel 05. Therefore, the amount of data detected in this embodiment is significantly less than the amount of data detected in each rotation period, so that the processing data of the control device 08 is greatly reduced. Increase data Speed, simplify data processing steps, reduce data processing capability requirements of control unit 08, and reduce costs

[0048] Based on the above two embodiments, the projection system is further improved to increase the synchronization between the fluorescent wheel and the filter wheel. As shown in FIG. 2, FIG. 2 is a schematic structural diagram of a projection system according to another embodiment of the present invention.

[0049] In contrast to FIG. 1, further, the projection system further includes a reflective element 09 for reflecting the sequential light emitted by the filter wheel 05 onto the spatial light modulator 10. The reflective element 09 can be a mirror.

[0050] The spatial light modulator 10 receives the sequence light emitted by the filter wheel 05 corresponding to the color control signal sent by the control device 08. The color control signal sent by the control device 08 is used to adjust the pupils of the tens of thousands of small mirrors on the DMD chip in the spatial light modulator 10 or the reflected light of the reflection or transmission filter wheel 05, in order to ensure the clarity of the projected image. Degree, to avoid the image display 吋 color misalignment, the color control signal is consistent with the sequence light emitted by the filter wheel 05.

[0051] In the above projection system, the control device 08 does not synchronize the color control signal received on the spatial light modulator with the sequence light emitted by the filter wheel, and sends a control signal to the speed adjuster; And

[0052] the speed adjuster adjusts a rotation speed of the filter wheel according to the control signal, so that the sequence light emitted by the filter wheel is synchronized with the color control signal, and then adjusts the rotation speed of the fluorescent wheel, so that The fluorescent wheel rotates synchronously with the filter wheel.

[0053] Specifically, in the present embodiment, the synchronous adjustment of the fluorescent wheel 02 and the filter wheel 05 can be realized by using the spatial light modulator 10 as a main control object. First, the data processor determines whether the color control signal sent to the spatial light modulator 10 and the sequence light emitted by the filter wheel 05 are synchronized; if not, the speed adjuster first controls the filter wheel 05. The rotation speed synchronizes the sequence light emitted by the filter wheel 05 with the color control signal sent by the control device 08, and calculates the rotation speed of the fluorescent wheel 02 according to the rotation speed of the filter wheel 05 and the position of the first mark 03, after which the control device 08 controls the fluorescent wheel 02. In synchronization with the filter wheel 05, the color signals of the fluorescent wheel 02, the filter wheel 05 and the spatial light modulator 10 are finally matched, which further ensures the sharpness of the projected image and avoids the image display 吋 color misalignment.

[0054] It should be noted that, the rotation speed 吋 of the fluorescent wheel 02 and/or the filter wheel 05 is adjusted, and the adjustment speed may be only the adjustment speed of the filter wheel 05 and the adjustment speed of the fluorescent wheel 02 only. Or adjust the speed of both speed adjustments. [0055] Further, the first mark 03 and the second mark 06 may be black tape and/or fluorescent mark. The black tape absorbs the probe light, the fluorescent marker reflects the probe light, and the sensor records the reflected light. The black tape or the fluorescent mark can be adhered to the surface of the fluorescent wheel 02 or the filter wheel 05.

, Convenient.

[0056] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments are obvious to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but the scope of the invention is to be accorded

Claims

Claim

[Claim 1] A projection system includes a fluorescent wheel and a filter wheel, a surface of the fluorescent wheel is provided with a first mark, and a surface of the filter wheel is provided with a second mark, wherein the projection system further comprises a first sensor, a second sensor, and a control device, wherein the first sensor is disposed opposite to the first mark; the second sensor is disposed opposite to the second mark; the control device is respectively associated with the first sensor and the second sensor Electrical connection, wherein: the first sensor detects the first mark after the fluorescent wheel starts rotating, and generates a first jump level signal after detecting the first mark for the first time, and Transmitting the first hopping level signal to the control device;

The second sensor detects the second mark after the filter wheel starts rotating, and generates a second hop level signal when the second mark is detected for the first time, and the second a trip level signal is transmitted to the control device;

The control device adjusts the rotational speed of the fluorescent wheel and/or the filter wheel according to the inter-turn difference between the first hopping level signal and the second hopping level signal.

[Claim 2] The projection system according to claim 1, wherein the control device includes a data processor and a speed adjuster, wherein:

The data processor calculates an inter-turn difference between the first hopping level signal and the second hopping level signal, and when the inter-turn difference exceeds a threshold range 吋, sends a control signal to the speed adjuster ; and

The speed adjuster adjusts a rotational speed of the fluorescent wheel and/or the filter wheel in accordance with the control signal.

[Claim 3] The projection system according to claim 2, further comprising a reflective element, the reflective element receiving the sequential light emitted by the filter wheel, and reflecting the sequential light to a space On the light modulator.

[Claim 4] The projection system according to claim 3, wherein the color control signal received by the data processor on the spatial light modulator is out of sync with the sequence light emitted by the filter wheel, Sending a control signal to the speed adjuster; and

The speed adjuster adjusts a rotation speed of the filter wheel according to the control signal to filter The sequence light emitted by the light wheel is synchronized with the color control signal, and the rotation speed of the fluorescent wheel is adjusted such that the fluorescent wheel rotates synchronously with the filter wheel.

[Claim 5] The projection system according to any one of claims 1 to 4, wherein the first mark and the second mark are black tape and/or fluorescent mark.

[Claim 6] A projection system includes a fluorescent wheel and a filter wheel, a surface of the fluorescent wheel is provided with a first mark, and a surface of the filter wheel is provided with a second mark, wherein the projection system further comprises a first sensor, a second sensor, and a control device, wherein the first sensor is disposed opposite to the first mark; the second sensor is disposed opposite to the second mark; the control device is respectively associated with the first sensor and the second sensor Electrical connection, wherein: the first sensor detects the first mark every predetermined length after the fluorescent wheel starts rotating, and detects the first time every the preset length a flag 吋 generates a first hopping level signal;

The second sensor detects the second mark every the preset length after the filter wheel starts rotating, and detects the second mark for the first time every the preset length吋 generating a second hopping level signal, wherein the predetermined 吋 length is greater than a rotation period of the fluorescent wheel and the filter wheel;

[Claim 7] The projection system according to claim 6, wherein the control device comprises a data processor and a speed adjuster, wherein:

The data processor calculates an inter-turn difference between the first hopping level signal and the second hopping level signal, and when the inter-turn difference exceeds a preset threshold range, sends a control signal to the Speed adjuster; and

[Claim 8] The projection system according to claim 7, further comprising a reflective element, the reflective element receiving the sequential light emitted by the filter wheel, and reflecting the sequential light to a space On the light modulator.

[Claim 9] The projection system according to claim 8, wherein the color control signal received by the data processor on the spatial light modulator is out of sync with the sequence light emitted by the filter wheel, Sending a control signal to the speed adjuster; and

The speed adjuster adjusts a rotation speed of the filter wheel according to the control signal so that the sequence light emitted by the filter wheel is synchronized with the color control signal, and then adjusts the rotation speed of the fluorescent wheel, so that the fluorescent wheel Rotating in synchronism with the filter wheel.

[Claim 10] The projection system according to any one of claims 6 to 9, wherein the first mark and the second mark are black tape and/or fluorescent mark.