CN109521638B - Optical module - Google Patents

Optical module Download PDF

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Publication number
CN109521638B
CN109521638B CN201811560609.9A CN201811560609A CN109521638B CN 109521638 B CN109521638 B CN 109521638B CN 201811560609 A CN201811560609 A CN 201811560609A CN 109521638 B CN109521638 B CN 109521638B
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China
Prior art keywords
fluorescent
wheel
driving unit
filter
color
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CN201811560609.9A
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CN109521638A (en
Inventor
林文瑶
萧启宏
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Qisda Optronics Suzhou Co Ltd
Qisda Corp
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Qisda Optronics Suzhou Co Ltd
Qisda Corp
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Priority to CN201811560609.9A priority Critical patent/CN109521638B/en
Publication of CN109521638A publication Critical patent/CN109521638A/en
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/007—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light
    • G02B26/008—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light in the form of devices for effecting sequential colour changes, e.g. colour wheels

Abstract

The invention provides an optical module, which comprises a light source, a fluorescent wheel, a first driving unit, a color wheel, a second driving unit, a third driving unit and a control unit. The fluorescent wheel includes a fluorescent region. The color wheel comprises a plurality of sector filters. The at least one fan-shaped filter comprises a plurality of filter regions. The central angles of the plurality of filter regions are the same, and the colors of at least two adjacent filter regions are different. The control unit selectively controls one of the first driving unit and the second driving unit by a delay time so as to control the overlapping proportion of the fluorescence area and one of the plurality of filter areas. The control unit selectively controls the third driving unit to drive the color wheel to move relative to the fluorescent wheel so as to enable one of the filter zones to move to the position corresponding to the fluorescent zone. Therefore, the requirements of different color brightness and different color gamuts are met.

Description

Optical module
Technical Field
The present invention relates to an optical module, and more particularly, to an optical module capable of meeting the requirements of different color brightness and different color gamut by controlling the overlapping ratio of the fluorescent region of a fluorescent wheel and the filter region of a color wheel.
Background
A color wheel (color wheel) is a color source for a Digital Light Processing (DLP) projector. The light emitted from the light source is reflected by a Digital Micromirror Device (DMD) and then passes through the color wheel, thereby displaying different colors. Generally, the color wheel is composed of a plurality of filters. When there is a need for different Color brightness (CLO), the central angle of the filter must be changed. Since the filters with different central angles are required to be manufactured separately, the manufacturing cost of the color wheel is increased.
Disclosure of Invention
The present invention is directed to an optical module for satisfying the requirements of different color brightness and different color gamut by controlling the overlapping ratio of the fluorescent region of the fluorescent wheel and the filter region of the color wheel, so as to solve the above-mentioned problems.
To achieve the above object, the present invention further provides an optical module, comprising: a light source; a fluorescent wheel disposed opposite the light source, the fluorescent wheel including a fluorescent region; a first driving unit for driving the fluorescent wheel to rotate; the color wheel is arranged opposite to the fluorescent wheel and comprises a plurality of fan-shaped filters which are arranged into a circle, at least one fan-shaped filter comprises a plurality of filter areas, the central angles of the plurality of filter areas are the same, and the colors of at least two adjacent filter areas are different; the second driving unit is used for driving the color wheel to rotate; the third driving unit is used for driving the color wheel to move relative to the fluorescent wheel; the control unit is electrically connected with the first driving unit, the second driving unit and the third driving unit; when the control unit controls the first driving unit to drive the fluorescent wheel to rotate and controls the second driving unit to drive the color wheel to rotate, one of the first driving unit and the second driving unit is selectively controlled by a delay time so as to control the overlapping proportion of the fluorescent area and one of the plurality of filter areas; the control unit selectively controls the third driving unit to drive the color wheel to move relative to the fluorescent wheel so as to enable one of the plurality of filter zones to move to a position corresponding to the fluorescent zone.
Preferably, the light emitted from the light source is blue light, and the fluorescent region is provided with yellow fluorescent powder to convert the blue light into yellow light.
Preferably, the fluorescent wheel further comprises a transparent region, and the blue light emitted by the light source can directly pass through the transparent region.
Preferably, the control unit adjusts the color ratio of the output light by controlling the overlapping ratio of the fluorescent region and one of the plurality of filter regions.
Preferably, the light emitted by the light source is a primary color, and the fluorescent region and the plurality of filter regions are secondary colors.
Preferably, the plurality of filter regions belong to the same color family.
Preferably, the plurality of filter regions belong to different color systems.
In order to achieve the above object, the present invention further provides a projection apparatus having the above optical module.
Compared with the prior art, the optical module controls the overlapping proportion of the fluorescent area of the fluorescent wheel and the filtering area of the color wheel by the delay time, and controls the color wheel to move relative to the fluorescent wheel so as to meet the requirements of different color brightness and different color gamut. Because the plurality of filter areas on the filter of the color wheel have the same central angle, the invention does not need to manufacture the filters with different central angles respectively, and can effectively reduce the manufacturing cost of the color wheel.
The advantages and spirit of the present invention can be further understood by the following detailed description of the invention and the accompanying drawings.
Drawings
FIG. 1 is a functional block diagram of an optical module according to an embodiment of the present invention.
FIG. 2 is a schematic view of the fluorescence wheel of FIG. 1.
Fig. 3 is a schematic diagram of the color wheel in fig. 1.
FIG. 4 is a schematic diagram of the colors of the output light after the light passes through the fluorescent wheel and the color wheel.
FIG. 5 is another schematic diagram of the color of the output light after the light passes through the fluorescent wheel and the color wheel.
FIG. 6 is another schematic diagram of the color of the output light after the light passes through the fluorescent wheel and the color wheel.
Detailed Description
In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.
Referring to fig. 1 to 6, fig. 1 is a functional block diagram of an optical module 1 according to an embodiment of the present invention, fig. 2 is a schematic diagram of a fluorescent wheel 12 in fig. 1, fig. 3 is a schematic diagram of a color wheel 16 in fig. 1, fig. 4 is a schematic diagram of colors of output light after light passes through the fluorescent wheel 12 and the color wheel 16, fig. 5 is another schematic diagram of colors of output light after light passes through the fluorescent wheel 12 and the color wheel 16, and fig. 6 is another schematic diagram of colors of output light after light passes through the fluorescent wheel 12 and the color wheel 16.
As shown in fig. 1, the optical module 1 includes a light source 10, a fluorescent wheel 12, a first driving unit 14, a color wheel 16, a second driving unit 18, a third driving unit 20, and a control unit 22. The optical module 1 can be applied to a projector or other optical devices to output various light colors. In this embodiment, the light source 10 may be a laser, but not limited thereto. The first driving unit 14 is used for driving the fluorescent wheel 12 to rotate. The second driving unit 18 is used for driving the color wheel 16 to rotate, and the third driving unit 20 is used for driving the color wheel 16 to move relative to the fluorescent wheel 12. In this embodiment, the first driving unit 14, the second driving unit 18 and the third driving unit 20 may be motors, but not limited thereto. The control unit 22 is electrically connected to the light source 10, the first driving unit 14, the second driving unit 18 and the third driving unit 20. In this embodiment, the control unit 22 can be a controller for controlling the operations of the light source 10, the first driving unit 14, the second driving unit 18 and the third driving unit 20. The optical module 1 can be used in a projection apparatus, but is not limited thereto.
A luminescent wheel 12 is disposed opposite the light source 10 and a color wheel 16 is disposed opposite the luminescent wheel 12. As shown in FIG. 2, fluorescent wheel 12 includes a fluorescent region 120 and a transparent region 122. In this embodiment, the phosphor region 120 is a phosphor-coated region. For example, when the light emitted from the light source 10 is blue light, the fluorescent region 120 of the fluorescent wheel 12 may be provided with yellow phosphor powder to convert the blue light into yellow light, and the blue light may directly pass through the transparent region 122. It should be noted that the color of the light emitted from the light source 10 and the color of the fluorescent area 120 can be determined according to practical applications, and is not limited to the above embodiments.
As shown in fig. 3, the color wheel 16 includes a plurality of sector filters 160, 162, 164, and the plurality of sector filters 160, 162, 164 are arranged in a circle, wherein at least one sector filter includes a plurality of filter regions, the central angles of the plurality of filter regions are the same, and the colors of at least two adjacent filter regions are different. In this embodiment, the fan filter 160 may include two filter regions 160a and 160b, the central angles of the two filter regions 160a and 160b are the same, and the colors of the two filter regions 160a and 160b are different; the sector filter 162 may include two filter regions 162a and 162b, the central angles of the two filter regions 162a and 162b are the same, and the colors of the two filter regions 162a and 162b are different; the fan filter 164 may include a transparent region 1640. It should be noted that the number of the sector filters and the number of the filter regions of each sector filter can be determined according to practical applications, and is not limited to the above embodiments.
In this embodiment, the light emitted from the light source 10 can be a primary color, and the fluorescent area 120 of the fluorescent wheel 12 and the filter areas 160a, 160b, 162a, 162b of the fan- shaped filters 160, 162 can be a secondary color. For example, when the light emitted from the light source 10 is blue, the fluorescent region 120 of the fluorescent wheel 12 can be yellow, and the filter regions 160a, 160b, 162a, 162b of the fan- shaped filters 160, 162 can be magenta (magenta) or cyan (cyan).
In this embodiment, the filter regions 160a and 160b of the sector filter 160 can belong to the same color family (e.g., magenta), and the filter regions 162a and 162b of the sector filter 162 can belong to the same color family (e.g., cyan). Since the two filter regions 160a and 160b have different colors, the filter region 160a can be dark magenta, and the filter region 160b can be light magenta. Similarly, since the two filter regions 162a and 162b have different colors, the filter region 162a can be dark cyan and the filter region 162b can be light cyan.
In another embodiment, the filter regions 160a and 160b of the sector filter 160 can belong to different color systems, and the filter regions 162a and 162b of the sector filter 162 can belong to different color systems. For example, filter 160a can be dark magenta, filter 160b can be light cyan, filter 162a can be dark cyan, and filter 162b can be light magenta.
It should be noted that the color of the filter region of each of the sector filters can be determined according to the application, and is not limited to the above embodiments.
When the optical module 1 is in operation, the control unit 22 controls the first driving unit 14 to drive the fluorescent wheel 12 to rotate and controls the second driving unit 18 to drive the color wheel 16 to rotate. When the transparent region 122 of the fluorescent wheel 12 corresponds to a portion of the filter region 160a of the color wheel 16, and the fluorescent region 120 of the fluorescent wheel 12 corresponds to another portion of the filter region 160a, the filter region 162a and the transparent region 1640 of the color wheel 16, the output light color of the light emitted by the light source 10 after passing through the fluorescent wheel 12 and the color wheel 16 is as shown in fig. 4. In this embodiment, the light emitted from the light source 10 is blue, the fluorescent region 120 is yellow, the filter region 160a is magenta, and the filter region 162a is cyan, so that the output light colors are blue, magenta, cyan, and yellow.
When the color brightness requirements are different, the control unit 22 can selectively control one of the first driving unit 14 and the second driving unit 18 with a delay time to control the overlapping ratio of the fluorescent region 120 of the fluorescent wheel 12 and one of the filter regions 160a, 162a of the color wheel 16, so as to adjust the ratio of the output light color. As shown in fig. 5, after the control unit 22 controls one of the first driving unit 14 and the second driving unit 18 with a delay time, the overlapping ratio of the fluorescent region 120 of the fluorescent wheel 12 and the filter region 160a of the color wheel 16 increases, and thus the ratio of the output red light increases. Therefore, the proportion of the color of the output light can be adjusted according to the requirements of different color brightness.
When the color gamut needs are different, the control unit 22 can selectively control the third driving unit 20 to drive the color wheel 16 to move relative to the fluorescent wheel 12, so as to move one of the filter regions 160a, 160b, 162a, 162b to the position corresponding to the fluorescent region 120. As shown in fig. 6, the control unit 22 can control the third driving unit 20 to drive the color wheel 16 to move relative to the fluorescent wheel 12, so that the filter regions 160b and 162b move to the positions corresponding to the fluorescent regions 120. In this embodiment, the light emitted from the light source 10 is blue, the fluorescent region 120 is yellow, the filter region 160b is light magenta, and the filter region 162b is light cyan, so the output light colors are light red, light green, yellow and blue. Therefore, the color of the output light can be adjusted according to different color gamut requirements.
In summary, the optical module of the present invention controls the overlapping ratio of the fluorescent region of the fluorescent wheel and the filter region of the color wheel by the delay time, and controls the color wheel to move relative to the fluorescent wheel, so as to meet the requirements of different color brightness and different color gamut. Because the plurality of filter areas on the filter of the color wheel have the same central angle, the invention does not need to manufacture the filters with different central angles respectively, and can effectively reduce the manufacturing cost of the color wheel.
The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. Rather, it is intended that all such modifications and variations be included within the spirit and scope of this invention.

Claims (8)

1. An optical module, comprising:
a light source;
a fluorescent wheel disposed opposite the light source, the fluorescent wheel including a fluorescent region;
a first driving unit for driving the fluorescent wheel to rotate;
the color wheel is arranged opposite to the fluorescent wheel and comprises a plurality of fan-shaped filters which are arranged into a circle, at least one fan-shaped filter comprises a plurality of filter areas, the central angles of the plurality of filter areas are the same, and the colors of at least two adjacent filter areas are different;
the second driving unit is used for driving the color wheel to rotate;
the third driving unit is used for driving the color wheel to move relative to the fluorescent wheel; and
the control unit is electrically connected with the first driving unit, the second driving unit and the third driving unit;
when the control unit controls the first driving unit to drive the fluorescent wheel to rotate and controls the second driving unit to drive the color wheel to rotate, one of the first driving unit and the second driving unit is selectively controlled by a delay time so as to control the overlapping proportion of the fluorescent area and one of the plurality of filter areas; the control unit selectively controls the third driving unit to drive the color wheel to move relative to the fluorescent wheel so as to enable one of the plurality of filter zones to move to a position corresponding to the fluorescent zone.
2. The optical module of claim 1, wherein the light emitted from the light source is blue light, and the phosphor region has a yellow phosphor to convert the blue light into yellow light.
3. The optical module of claim 2, wherein the fluorescent wheel further comprises a transparent region through which blue light from the light source can pass directly.
4. The optical module of claim 1, wherein when the transparent region of the fluorescent wheel corresponds to a portion of the plurality of filter regions of the color wheel, the fluorescent region of the fluorescent wheel corresponds to another portion of the plurality of filter regions of the color wheel and the transparent region of the color wheel.
5. The optical module of claim 1, wherein the light emitted from the light source is a primary color, and the fluorescent region and the plurality of filter regions are secondary colors.
6. The optical module of claim 1, wherein the plurality of filter regions belong to the same color family.
7. The optical module of claim 1, wherein the plurality of filter regions belong to different color systems.
8. A projection device comprising an optical module according to any one of claims 1 to 7.
CN201811560609.9A 2018-12-20 2018-12-20 Optical module Active CN109521638B (en)

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CN109521638B true CN109521638B (en) 2021-01-05

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Publication number Priority date Publication date Assignee Title
CN110221424B (en) * 2019-05-24 2021-11-19 苏州佳世达光电有限公司 Optical module

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CN108873583A (en) * 2018-08-03 2018-11-23 苏州佳世达光电有限公司 Color wheel of projecting camera and the projector for applying it
CN109884852A (en) * 2019-03-29 2019-06-14 苏州佳世达光电有限公司 Light source module and projection arrangement

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Publication number Priority date Publication date Assignee Title
US4241520A (en) * 1979-03-05 1980-12-30 Norton Thomas K Color calculator
EP0387423A3 (en) * 1989-03-15 1990-12-27 Richard Wolf Gmbh Illumination device for an endoscope
CN2114749U (en) * 1992-03-24 1992-09-02 首都图书馆文化服务部 Light colour changer
JP2004294985A (en) * 2003-03-28 2004-10-21 Plus Vision Corp Illumination optical system and projector using the same
CN104765240A (en) * 2014-01-03 2015-07-08 深圳市亿思达科技集团有限公司 Dual laser light source system
CN104317151A (en) * 2014-10-27 2015-01-28 苏州佳世达光电有限公司 Light projection apparatus and light mixing method for light projection apparatus
CN106483750A (en) * 2015-09-02 2017-03-08 欧司朗有限公司 Optical module
CN105135367A (en) * 2015-09-18 2015-12-09 广州市浩洋电子有限公司 Novel light filtering device, color wheel comprising novel light filtering device, and stage lamp system comprising novel light filtering device
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CN109884852A (en) * 2019-03-29 2019-06-14 苏州佳世达光电有限公司 Light source module and projection arrangement

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