WO2018014617A1 - Colour wheel module, light-emitting device and projection system - Google Patents

Abstract

Disclosed is a colour wheel module (30) comprising a first colour wheel (31), a second colour wheel (33), a drive device (35) and an adjustment device (37). Both the colour wheel (31) and the second colour wheel (33) comprise first primary colour areas (311 and 331) and transparent areas (313 and 335). The drive device (35) is used for driving the first colour wheel (31) and the second colour wheel (33) to perform synchronous rotation around the same axis. The adjustment device (37) is used for adjusting the first colour wheel (31) or the second colour wheel (33) to rotate to a predetermined angle, so as to control an area exiting a first primary colour light and an area exiting a second primary colour light of the colour wheel module (30) in a predetermined area proportion. Further disclosed are light-emitting devices (10 and 81) having the colour wheel module (30) and projection systems (100 and 200).

Description

 Color wheel module, illuminating device and projection system Technical field

The present invention relates to the field of projection technology, and in particular, to a color wheel module, a light emitting device, a projection system, and a control method thereof.

Background technique

At present, projection devices are widely used in various applications such as movie broadcasting, conferences, and publicity. The light-emitting device in the projection device outputs monochromatic light of three primary colors of red, green and blue, and the light modulation device modulates the light of the three primary colors of red, green and blue to generate a monochrome image of the light of each primary color, and images the image on the screen.

technical problem

Different people have different sensitivity to different colors. Some people may think that a certain color is too bright or too dark when they see the same projection display image. However, the existing projection device usually adjusts the overall brightness and emits light. The proportion of each monochromatic light output by the device is fixed and unadjustable, which affects the use.

Technical solution

In view of the above, it is necessary to provide a color wheel module, a light-emitting device, a projection system, and a control method that avoid the above problems.

A color wheel module includes:

a first color wheel comprising a first primary color region and a transparent region;

a second color wheel, after the exiting optical path of the transparent region of the first color wheel, includes a first primary color region and a transparent region;

a driving device, configured to drive the first color wheel and the second color wheel to rotate synchronously around the same axis;

a region where a first primary color region of the first color wheel and the second color wheel coincides with a projection of a transparent region of the other in the axial direction, and a first primary color of the first color wheel a region in which the projection of the region and the first primary color region of the second color wheel coincides in the axial direction is combined into an area in which the color wheel module emits light of the first primary color under illumination of the light source;

An area in which the transparent area of the first color wheel overlaps with the projection of the transparent area of the second color wheel in the axial direction constitutes the color wheel module emitting the second primary color light under illumination of the light source region;

An adjusting device, configured to adjust a rotation of the first color wheel or the second color wheel by a predetermined angle to control the area of the color wheel module that emits the first primary color light and the light that emits the second primary color light The area is in a predetermined area.

Further, the first color wheel or the second color wheel further includes a third primary color region, a third primary color region of one of the first color wheel and the second color wheel and a transparent region of the other color The areas in which the projections coincide in the axial direction constitute an area in which the color wheel module emits light of the third primary color under illumination of the light source.

Further, the first color wheel and the second color wheel are disposed in close proximity, and there is no gap between the first color wheel and the second color wheel.

Further, the area of the first color wheel except the transmission area and the area of the second color wheel except the transmission area thereof are reflective areas, and the light exit side of the reflective area is the same as the light incident side.

Further, there is a preset distance between the first color wheel and the second color wheel.

Further, a region of the first color wheel other than the transmissive region and a region of the second color wheel other than the transmissive region thereof are transmissive regions, and a light exiting side of the transmissive region is different from a light incident side;

The color wheel module further includes a focusing lens between the first color wheel and the second color wheel, and the light emitted by the first color wheel is collected by the focusing lens to have a spot of a predetermined size Projected onto the second color wheel.

Further, the first primary color region carries a red phosphor.

A light emitting device includes a light source and a color wheel module as described above.

A projection system comprising the light-emitting device, the light modulating device and the control module as described above, wherein the light modulating device is configured to receive the first primary color light and the second primary color light, and to perform the first A primary color light and the second primary color light are image-modulated; and the control module is configured to control a time ratio of the first primary color light and the second primary color light output by the illumination device.

A projection system comprising:

a light emitting device, configured to output at least a first primary color light and a second primary color light according to a time sequence;

a light modulating device, configured to receive the first primary color light and the second primary color light, and perform image modulation on the first primary color light and the second primary color light according to input image data;

And a control module, configured to control a time ratio of the first primary color light and the second primary color light output by the illumination device.

Further, in synthesizing the image modulation for outputting one frame of the color image, the control module controls the primary color light of the first primary color light and the second primary color light to be relatively heavy, as two frames of the monochrome image. The light source is modulated.

Further, the projection system further includes a ratio acquisition module, wherein the ratio acquisition module is configured to acquire a preset time ratio of the first primary color light and the second primary color light output by the illumination device, and the control The module is configured to adjust an actual time ratio of the first primary color light and the second primary color light output by the light emitting device to a preset time ratio.

Further, the projection system further includes an image analysis module, and the image analysis module is configured to acquire input grayscale values of the first primary color and the second primary color of each pixel of each frame input image.

Further, the control module is configured to acquire an original time ratio of the first primary color light and the second primary color light in the combined output color image, and obtain the first primary color light to occupy the preset time a first specific gravity that increases or decreases with respect to the ratio of the original time, and a second specific gravity that increases or decreases with respect to the ratio of the original time in the predetermined time ratio of the second primary color light And calculating, according to the first specific gravity, the second specific gravity, and the input grayscale value, an output grayscale value of each pixel of each frame of the monochrome image when the color image is outputted, and controlling the The light modulation device modulates the image according to the output gray scale value described above.

Further, the input gray scale values of the first primary color and the second primary color of a certain pixel point of the input image data are respectively N1 and N2, and the first primary color light is relatively compared in the preset time ratio. The first specific gravity increased in the ratio of the original time is B1, and the second specific color in the preset time ratio is reduced by 2% with respect to the original time ratio, and the composite output is one frame. The monochrome images of the color image are the first primary color image, the first primary color image, and the second primary color image, respectively, and the grayscale values of the corresponding pixels in the monochrome image are respectively N1, N1×B1, N2×(1-B2 ).

Further, the input gray scale values of the first primary color and the second primary color of a certain pixel of the input image are respectively N1 and N2, and the first primary color light is set in the preset time ratio relative to The first specific gravity of the reduction of the original time ratio is B2, and the second specific gravity of the second primary color light in the preset time ratio is increased by B1 with respect to the original time ratio, and the composite output is one frame color. The monochrome images of the image are the first primary color image, the first primary color image, and the second primary color image, respectively, and the grayscale values of the corresponding pixels in the monochrome image are N1×(1-B2), N2, N2×B1, respectively. .

Further, the input image data includes an input grayscale value of a first primary color and a second primary color of each pixel of each frame input image;

The control module is further configured to output a synchronization signal to the light modulation device according to a time ratio of the first primary color light to the second primary color light, such that the illumination device emits the first primary color light within a period of time And the light modulating device modulates the first primary color light according to a corresponding input gray scale value of each pixel point of the first primary color, and the time period in which the illuminating device emits the second primary color light The light modulating means modulates the second primary color light according to a respective input gray scale value of each of the pixel points of the second primary color.

Further, the first primary color is red, the first primary color light is red light; the second primary color is blue, and the second primary color light is blue light.

Further, the projection system further includes:

a light output mode acquiring device, configured to acquire a light output mode, wherein the light-emitting device corresponding to the different light output modes outputs a different time ratio of the first primary color light and the second primary color light;

The control module controls a time ratio of the first primary color light and the second primary color light to be output by the light emitting device according to the time ratio corresponding to the light output mode acquired by the light output mode acquiring device.

Further, the light emitting device includes a light source and the color wheel module described above;

The control module is configured to output a control signal to the adjusting device, and the adjusting device adjusts a rotation angle of the first color wheel or the second color wheel according to the control signal, so that the color wheel mode The region of the group that emits the first primary color light and the region from which the second primary color light is emitted have a predetermined area ratio, such that the time of the first primary color light output by the illumination device and the second primary color light is proportional.

A control method applied to a projection system, comprising: controlling a time ratio of a first primary color light and a second primary color light emitted by an illumination device of the projection system, and controlling a light modulation device of the projection system to perform image modulation .

Further, wherein controlling the time ratio of the first primary color light and the second primary color light emitted by the light emitting device of the projection system comprises the following steps:

Obtaining a preset time ratio of the first primary color light and the second primary color light of the light emitting device;

The actual time ratio of the first primary color light and the second primary color light output by the light emitting device of the projection system is adjusted to a preset time ratio.

Further, a preset time ratio of the first primary color light and the second primary color light of the light emitting device is acquired by a ratio acquisition module.

Further, a preset time ratio of the first primary color light and the second primary color light of the light emitting device is acquired by a light output mode acquiring device.

Further, wherein the light modulation device that controls the projection system performs image modulation, specifically comprising the following steps:

Parsing an input grayscale value of the first primary color and the second primary color of each pixel point of the input image data;

Obtaining a proportion of the first primary color light increasing or decreasing relative to the original time ratio in the preset time ratio, and a ratio of the second primary color light to the original time ratio in the preset time ratio Reduced weight; and

Calculating, according to the first specific gravity, the second specific gravity, and the input grayscale value, an output grayscale value of each pixel of each frame monochrome image when a color image is outputted, and controlling the light modulation The device modulates the image according to the output gray scale value described above.

Beneficial effect

Compared with the prior art, the present invention provides a color wheel module, a light emitting device, a projection system, and a control method, by adjusting an area of the color wheel module that emits the first primary color light and emits the second primary color light. The area of the first primary color light and the second primary color light emitted by the light emitting device is adjustable, and is convenient to use. Further, since the primary primary color light and the second primary color light output by the light-emitting device are relatively heavy, the primary color light is modulated as a light source of the two-frame monochrome image, thereby improving the first primary color light in the projected display image. And the second primary color light occupies a relatively heavy primary color brightness, thereby improving the overall display quality.

DRAWINGS

1 is a schematic view of a projection system according to a first embodiment of the present invention.

2 is a schematic view of the color wheel of FIG. 1.

3 is a schematic flow chart of a control method provided by the present invention.

4 is a flow chart showing the time ratio of the first primary color light and the second primary color light emitted by the control illumination device controlled by the control method shown in FIG. 3.

Fig. 5 is a flow chart showing the image modulation by the control light modulating device of the control method shown in Fig. 3.

Figure 6 is a schematic illustration of a projection system in accordance with a second embodiment of the present invention.

Main component symbol description

Projection system	100, 200
Illuminating device	10, 81
light source	20
Color wheel module	30
First color wheel	31
First primary color region	311, 331
Transparent area	313, 335
Third primary color region	315
Second color wheel	33
Drive unit	35
Adjustment device	37
Light modulation device	50, 83
Ratio acquisition module	72
Control module	74, 84
Image parsing module	76
Light output mode acquisition device	86
Storage module	87

The invention will be further illustrated by the following detailed description in conjunction with the accompanying drawings.

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, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention. The features of the embodiments and examples described below can be combined with each other without conflict.

It should be noted that in the present invention, when one component is considered to be "connected" to another component, it may be directly connected to another component or may be indirectly connected to another component through the centering component.

All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. The terminology used in the description of the present invention is for the purpose of describing particular embodiments and is not intended to limit the invention.

Referring to FIG. 1 , a first embodiment of the present invention provides a projection system 100 including a light emitting device 10 and a light modulating device 50 . In this embodiment, the projection system 100 further includes necessary or unnecessary structural features such as a projection lens and a projection screen. To save space, no further details are provided herein. The light emitting device 10 is configured to output at least a first primary color light and a second primary color light in time series. The light modulating device 50 is configured to receive the first primary color light and the second primary color light, and perform image modulation on the first primary color light and the second primary color light according to the input image data.

The light emitting device 10 includes a light source 20 and a color wheel module 30. In this embodiment, the light source 20 is capable of generating an excitation light. The light source 20 can be a light emitting diode, a laser diode, or other solid state light source.

The color wheel module 30 is disposed on a transmission path of the excitation light generated by the light source 20, and transmits or wavelength-converts the excitation light to generate at least one primary color light. Referring to FIG. 2 , the color wheel module 30 includes a first color wheel 31 , a second color wheel 33 , a driving device 35 , and an adjusting device 37 . The first color wheel 31 is disposed toward the light source 20. In the embodiment, the first color wheel 31 and the second color wheel 33 are coaxially and superposed. The first color wheel 31 has a substantially disk shape and includes a first primary color region 311, a transparent region 313, and a third primary color region 315 which are sequentially disposed in the circumferential direction. The second color wheel 33 includes a first primary color region 331 and a transparent region 335 which are sequentially disposed in the circumferential direction. In this embodiment, the first primary color is red, the second primary color is blue, and the third primary color is green, and the light source 20 is capable of generating blue excitation light.

The first primary color region 311 carries a first primary color wavelength converting material to excite and emit light of the first primary color under illumination of the light source 20, and the transparent region 313 and the transparent region 335 are used to emit light of the second primary color. In one embodiment, the transparent region 313 and the transparent region 335 may scatter and transmit incident light. The third primary color region 315 carries a third primary color wavelength converting material to excite the third primary color light upon illumination by the light source 20. The above wavelength converting material may be a phosphor, a quantum dot material, or other material that is capable of converting excitation light into a suitable color.

The first primary color region 311, the transparent region 313, and the third primary color region 315 of the first color wheel 31 have a sector structure, the angle of the first primary color region 311 is π/2, and the angle of the third primary color region 315 The angle of the transparent region 313 is 2π/3, which is 5π/6. The first primary color region 331 and the transparent region 335 of the second color wheel 33 have a sector structure, the angle of the first primary color region 331 is π/2, and the angle of the transparent region 335 is 3π/2. It can be understood that the areas of the first primary color region 311, the transparent region 313, and the third primary color region 315 on the first color wheel 31 and the first primary color region 331 on the second color wheel 33 can be set as needed. The area of the transparent region 335.

The driving device 35 is configured to drive the first color wheel 31 and the second color wheel 33 to rotate synchronously about the same axis. The synchronous rotation of the first color wheel 31 and the second color wheel 33 means that the first color wheel 31 and the second color wheel 33 have the same rotational speed, and the rotation start time and the rotation end time are the same. During the driving of the driving device 35 to drive the first color wheel 31 and the second color wheel 33, the first primary color region 311, the transparent region 313 and the third primary color region 315 of the first color wheel 31 And the first primary color region 331 and the transparent region 335 of the second color wheel 33 are alternately and periodically disposed on the transmission path of the excitation light generated by the light source 20, thereby causing the illumination device 10 to periodically output three primary colors. Light sequence. In this embodiment, the first color wheel 31 and the second color wheel 33 are disposed on the same rotating shaft, and the driving device 35 drives the rotating shaft to rotate, thereby driving the first color wheel 31 and the The second color wheel 33 rotates.

It can be understood that the number of the driving devices 35 may be two, and the two driving devices 35 respectively drive the first color wheel 31 and the second color wheel 33 to rotate.

An area in which the projection of the first primary color region (311, 331) of one of the first color wheel 31 and the second color wheel 33 coincides with the projection of the transparent region (313, 335) of the other in the axial direction And a region where the first primary color region 311 of the first color wheel 31 and the first primary color region 331 of the second color wheel 33 coincide in the axial direction are combined into the color wheel module 30. The region of the first primary color light is emitted by the illumination of the light source 20.

An area where the transparent area 313 of the first color wheel 31 and the transparent area 335 of the second color wheel 33 coincide in the axial direction constitute the color wheel module 30 under the illumination of the light source 20 An area in which the second primary color light is emitted.

It can be understood that, in another embodiment, the first color wheel 31 may not include a third primary color region, and the second color wheel 33 further includes a third primary color region, the first color wheel 31 and the A region in which the projection of the third primary color region of one of the second color wheel 33 and the transparent region of the other coincides in the axial direction constitutes an area in which the color wheel module 30 emits light of the third primary color under illumination of the light source .

It can be understood that, in another embodiment, the color wheel module 30 only emits the first primary color light and the second primary color light, that is, the first color wheel 31 and the second color wheel 33 do not include the first Three primary color areas.

The adjusting device 37 is configured to adjust the first color wheel 31 or the second color wheel 33 to rotate by a predetermined angle to control the area of the color wheel module 30 that emits the first primary color light and the The area where the second primary light is emitted is a predetermined area ratio. In this embodiment, the adjusting device 37 is disposed on the second color wheel 33, and the second color wheel 33 is rotated relative to the first color wheel 31 by operating the adjusting device 37 to change the a region where the first primary color region 311 of the first color wheel 31 coincides with a projection of the first primary color region 331 of the second color wheel 33 in the axial direction, and a transparent region 313 on the first color wheel 31 An area overlapping with the projection of the transparent region 335 on the second color wheel 33 in the axial direction further changes the proportion of the first primary color light and the second primary color light emitted by the color wheel module 30. It can be understood that the adjusting device 37 can also be disposed on the first color wheel 31, and the first color wheel 31 can be rotated relative to the second color wheel 33 by operating the adjusting device 37.

Specifically, when the actual time ratio of the first primary color light and the second primary color light emitted by the color wheel module 30 is 1:1, the first primary color region 311 of the first color wheel 31 is The angle of the occupied area of the first primary color region 311 of the second color wheel 33 projected on the axis is π/3, and the first primary color region 311 of the first color wheel 31 and the first color The angle of the projection of the transparent region 313 of the wheel 31 on the axis is π/6, the transparent region 313 of the first color wheel 31 and the first primary color region 331 of the second color wheel 33. The angle of the projection of the overlapped area on the axis is π/6, and the transparent area 313 of the first color wheel 31 and the transparent area 335 of the second color wheel 33 are projected on the axis. The angle of the area occupied by the area is 2π/3, and the angle of the area where the third primary color area 315 of the first color wheel 31 and the transparent area 335 of the second color wheel 33 project on the axis overlap It is 2π/3.

In other embodiments, the first color wheel 31 and the second color wheel 33 may also be a belt-like structure that is arranged to periodically translate under the driving of the driving device 35, or is disposed at the driving device 35. The cylindrical structure that is periodically rotated under the drive. Further, the light-emitting device 10 may be replaced by another light source system based on a color wheel and capable of generating primary light for display.

It can be understood that the light-emitting device 10 further includes a collecting device (not shown) for collecting, homogenizing or shaping the primary color light generated by the color wheel module 30 through the light collecting device.

The light modulating device 50 receives the primary color light output by the light emitting device 10 and performs image modulation on the primary color light. The primary color light after the image modulation by the light modulating device 50 is projected onto a screen (not shown) via a projection device (not shown). It can be understood that the light modulation device 50 can be an LCD, an LCoS, a DMD, or the like.

The projection system 100 further includes a ratio acquisition module 72, a control module 74, and an image analysis module 76.

The ratio acquisition module 72 is configured to acquire a preset time ratio of the first primary color light and the second primary color light output by the illumination device 10. The ratio acquisition module 72 can be carried on an input device having a structure such as a button or a touch screen connected to the control module 74. The connection between the ratio acquisition module 72 and the control module 74 may be a wired connection by means of a wire or the like, or may be a wireless connection method such as WIFI or Bluetooth.

The control module 74 is configured to control the operations of the light source 20, the color wheel module 30, and the light modulation device 50.

The image analysis module 76 is configured to analyze the grayscale values of the first primary color, the second primary color, and the third primary color at each pixel in each frame input image data.

Further, the input image data includes an input gray scale value of a first primary color and a second primary color of each pixel of each frame input image, and the control module 74 is configured to control the first output of the illumination device 10 The time ratio of the primary color light to the second primary color light, and the ratio of the first primary color light to the second primary color light output by the light emitting device 10 is the time of the first primary color light and the second primary color light output by the light emitting device 10 And outputting a synchronization signal to the light modulating device 50 according to a time ratio of the first primary color light to the second primary color light, such that: the light emitting device 10 emits the first primary color light within a period of time The light modulating device 50 modulates the first primary color light according to a corresponding input gray scale value of each pixel point of the first primary color, and the light emitting device 10 emits the second primary color light within a period of time The light modulating device 50 modulates the second primary color light according to a corresponding input grayscale value of each of the second primary colors at each pixel point.

Further, the control module 74 is configured to output a control signal to the adjusting device 37, and the adjusting device 37 adjusts a rotation angle of the first color wheel 31 or the second color wheel 33 according to the control signal. The area of the color wheel module 30 that emits the first primary color light and the area where the second primary color light is emitted are in a predetermined area ratio, thereby controlling the first primary color light output by the light emitting device 10 The ratio of time to the second primary light.

The control module 74 is configured to acquire an original time ratio of the first primary color light and the second primary color light in a composite output one-frame color image, and further, obtain the first primary color light in the pre-predetermined Setting a first specific gravity of the time ratio to increase or decrease with respect to the original time ratio, and obtaining an increase or decrease of the second primary color light in the preset time ratio relative to the original time ratio The second specific gravity is controlled to adjust the color wheel module 30 of the light-emitting device 10, so that the actual time ratio of the first primary color light and the second primary color light emitted by the color wheel module 30 is adjusted to a preset Calculating a time ratio, and calculating, according to the first specific gravity, the second specific gravity, and the input grayscale value, an output grayscale value of each pixel of each frame monochrome image when a color image is synthesized and outputted, and The light modulating device 50 is controlled to modulate an image according to the output gray scale value described above.

The image analysis module 76 acquires input grayscale values of the first primary color, the second primary color, and the third primary color of each pixel of the input image, and sets the first primary color, the second primary color, and the first The input gray scale values of a certain pixel of the three primary colors are respectively N1, N2, and N3; and the first primary color light is relatively heavy in the preset time ratio.

The control module 74 is configured to control the first primary color light to be modulated as a light source of two frames of monochrome images; the input grayscale values according to the pixel points are respectively N1, N2, and N3, and the first primary color light is preset. The first specific gravity of the ratio of the time ratio to the original time is increased by B1, and the second specific gravity of the second primary color is reduced by a ratio of the original time to the original time ratio B2, the control mode The group 74 calculates the gray level values of the first primary color images of the first primary color light at the corresponding pixel points as N1, N1×B1, respectively, and determines the grayscale value of the second primary color image of the second primary color light at the corresponding pixel point. For N2×(1-B2), the third primary color image of the third primary color light is determined to have a grayscale value of N3 at the corresponding pixel.

The control module 74 further controls the light modulation device 50 to time-modulate the two primary color images of the two frames when the color wheel module 30 emits a relatively small first primary color in the preset time ratio; The control module 74 is configured to control the light modulating device 50 to modulate a second primary color image when the color wheel module 30 emits the second primary color light; the control module 74 is configured to control the light modulating device The third primary color image is modulated by the color wheel module 30 when the third primary color light is emitted, that is, one frame of the color image is synthesized by four-frame monochrome image synthesis, and the four-frame monochrome image is: the first primary color The first primary color, the second primary color, and the third primary color, wherein the grayscale values of the pixels in the four-frame monochrome image are N1, N1×B1, N2×(1-B2), and N3, respectively.

When the second primary color light is relatively heavy in a preset time ratio of the first primary color light and the second primary color light, set the first primary color light to be in the preset time ratio relative to the The original time ratio decreases the specific gravity B2, and the second primary color light increases the proportion B1 with respect to the original time ratio in the actual time ratio, and the second primary color light is added as a two-frame monochrome image. The four-frame monochrome image is respectively: a first primary color, a second primary color, a second primary color, and a third primary color, and the grayscale values of the pixels in the four-frame monochrome image are: N1 ×(1-B2), N2, N2×B1, N3.

The following is an example in which the preset time ratio of the first primary color light and the second primary color light is 2:1, and the original time ratio of the first primary color light to the second primary color light is 1:1, and the image analysis is performed. The input gray scale values of the first primary color and the second primary color of a certain pixel of a frame input color image acquired by the module 76 are 250, 100, and 200, respectively.

The control module 74 calculates, based on the ratio of the original time, that the proportion of the first primary color light increases and the specific gravity of the second primary color decreases by 30%, that is, the first A primary color light is increased by 30% on the basis of the original time ratio, and the second primary color light is reduced by 30% on the basis of the original time ratio. The control module 74 adjusts and controls the adjusting device 37 of the light emitting device 10 to rotate the second color wheel 33 by a certain angle of 2π/9 with respect to the first color wheel 31, thereby further The actual time ratio of the second primary color light is adjusted to a preset time ratio of 2:1.

The control module 74 calculates the brightness of the first primary color light added to the pixel. As described above, the first primary color light is increased by 30% based on the original time ratio, and the pixel is added. The brightness of the first primary color light is 250×30%, and the second primary color light is reduced by 30% based on the original time ratio, and the brightness of the second primary color light for the pixel is 100×( 1-30%), the brightness of the third primary color light remains unchanged. The grayscale values of the above-mentioned pixels in the modulated four-frame image are: 250, 250×30%, 100×(1-30%), and 200, respectively.

In one embodiment, the first color wheel 31 and the second color wheel 33 are disposed in close proximity, and there is no gap between the first color wheel 31 and the second color wheel 33. In one embodiment, the first color wheel 31 and the second color wheel 33 are reflective color wheels to reduce light loss between the first color wheel 31 and the second color wheel 33. The area of the first color wheel 31 excluding the transmissive area and the area of the second color wheel 33 excluding the transmissive area are reflective areas, and the light exit side of the reflective area is the same as the light incident side.

In another embodiment, there is a preset distance between the first color wheel 31 and the second color wheel 33, and the first color wheel 31 and the second color wheel 33 are transmissive color wheels, and the first color wheel 31 is divided The area outside the transmission area and the area of the second color wheel 33 excluding the transmission area are transmissive areas, and the light exit side of the transmissive area is different from the light incident side. The color wheel module 30 further includes a focusing lens (not shown) such that light emitted from the first color wheel 31 is collected by the focusing lens and incident on the second color wheel 33, thereby causing the spot size on the second color wheel 33. Meet the needs of the preset.

The size of the spot incident on the second color wheel 33 is related to the spot size formed by the light beam of the subsequent color path of the first color wheel 31 in the projection system 100, and precisely controls the size of the spot incident on the second color wheel 33, thereby facilitating The size of the spot formed by the beam of the subsequent optical path is precisely controlled.

In an embodiment, the projection system 100 may not modulate the relatively heavy light as a light source of two frames of images, specifically, adjust the ratio of the first primary color light to the second primary color light of the light emitting device 10, in the light emitting device 10 During the period in which the first primary color light is emitted, the control light modulating device 50 performs image modulation according to the corresponding input grayscale value of the first primary color light at each pixel point in the input image data acquired by the image analysis module 76; 10, during the period in which the second primary color light is emitted, the control light modulating device 50 performs image modulation according to the corresponding input grayscale value of the second primary color light in each input pixel in the input image data acquired by the image analysis module 76; During the period in which the device 10 emits the third primary color light, the control light modulation device 50 performs image modulation according to the corresponding input grayscale value of the third primary color light in each of the input image data acquired by the image analysis module 76. For example, the red, blue, and green luminance values of a certain pixel in the input image data acquired by the image analysis module 76 are respectively: 250, 100, and 200, and the user selects the red light increase mode, and the default is in the red light increase mode. The ratio of the red light exiting section and the blue light exiting section of the color wheel module 30 is set to 2:1, and the control light modulating device 50 modulates according to the grayscale value of 250 during the period in which the color wheel module 30 emits red light, and The control light modulating device 50 modulates the gray scale value of 100 during the period in which the color wheel module 30 emits blue light.

Referring to FIG. 3, the present invention further provides a control method applied to the projection system 100, which specifically includes the following steps:

Step 31: Control a time ratio of the first primary color light and the second primary color light emitted by the light emitting device 10 of the projection system 100.

Step 32, controlling the light modulation device 50 of the projection system 100 to perform image modulation.

The light modulating device 50 performs image modulation on the first primary color light during a period in which the light emitting device 10 emits the first primary color light, and the light modulating device 50 emits the second primary color light in the light emitting device 10 The first primary color light is image modulated.

In the step 31, the time ratio of the first primary color light and the second primary color light emitted by the illumination device 10 of the projection system 100 is controlled. Referring to FIG. 4, the following steps are specifically included:

Step 301: Acquire a preset time ratio of the first primary color light and the second primary color light of the light emitting device 10. In this embodiment, the preset time ratio of the first primary color light and the second primary color light is obtained by the ratio acquisition module 72. In this embodiment, the first primary color light is in the The proportion of the preset time ratio of the first primary color light and the second primary color light is heavier.

Step 302: Control the actual time ratio of the first primary color light and the second primary color light output by the illumination device 10 of the projection system 100 to be equal to a preset time ratio.

In this embodiment, the primary color light having a relatively large proportion of the preset time ratio is modulated as a light source of two frames of monochrome images when the one-frame color image is synthesized and output. Controlling the adjustment of the actual time ratio of the first primary color light and the second primary color light output by the illumination device 10 to be equal to a preset time ratio by adjusting the first primary color region 311 and the second on the first color wheel 31 The overlapping area of the first primary color regions 331 of the color wheel 33 is achieved.

Further, the control module 74 is configured to output a control signal to the adjusting device 37, and the adjusting device 37 adjusts a rotation angle of the first color wheel 31 or the second color wheel 33 according to the control signal. So that the area of the color wheel module 30 that emits the first primary color light and the area that emits the second primary color light form a predetermined area ratio, thereby causing the first primary color light output by the light emitting device 10 The actual time ratio of the light with the second primary color is the preset time ratio.

In the step 32, the light modulating device 50 of the projection system 100 is controlled to perform image modulation. Referring to FIG. 5, the method includes the following steps:

Step 401: Analyze an input grayscale value of the first primary color and the second primary color of each pixel point of the input image data. It is assumed that the input gray scale values of the first primary color and the second primary color of a certain pixel point are N1 and N2, respectively. In the present embodiment, the image analysis module 76 acquires an input grayscale value of the first primary color and the second primary color of each pixel of the input image.

Step 402: Acquire a first specific gravity of the first primary color light that increases or decreases with respect to the original time ratio in the preset time proportion, and a proportion of the second primary color light to the preset time A second specific gravity that decreases or increases relative to the original time. In the embodiment, the control module 74 calculates, by using the control module 74, that the first primary color light increases in the preset time ratio relative to the original time ratio by B1, and the second primary color light a second specific gravity B2 that is reduced in proportion to the original time in the preset time ratio.

Step 403: Calculate, according to the first specific gravity, the second specific gravity, and the input grayscale value, an output grayscale value of each pixel of each frame of the monochrome image when the color image is outputted, and a control station. The light modulating device 50 modulates the image in accordance with the output gray scale value described above.

In this embodiment, the control unit 74 calculates that the first primary color light is relatively heavy in the preset time ratio, and further determines that the first primary color light is modulated as a light source of two frames of monochrome images. Calculating, by the control module 74, that the grayscale values of the pixel points are N1, N1×B1, N2×(1-B2), and N3, respectively; and the light modulation device 50 that controls the projection system 100 is in the When the light-emitting device 10 outputs the primary light that accounts for a relatively large proportion of the preset time ratio, the two-frame monochrome image is time-divisionally modulated. In the present embodiment, the light modulation device 50 is controlled to output the light in the light-emitting device 10 In the first primary color light, the first primary color images of the two frames are time-divisionally modulated, and the grayscale values of the corresponding pixels of the two primary color image of the two frames are respectively N1, N1 × B1, and the light modulation device 50 is controlled. When the second primary color light is outputted by the illumination device 10, a second primary color image is modulated, and a grayscale value of the corresponding pixel of the second primary color image is N2×(1-B2), and the light modulation device 50 is controlled. When the light emitting device 10 outputs the third primary color light, modulating a frame of the third base The image, the third primary color a respective gray scale image pixel value N3.

When the second primary color light is relatively heavy in a preset time ratio of the first primary color light and the second primary color light, set the first primary color light to be in the preset time ratio relative to the The first specific gravity of the decrease in the original time ratio is B2, and the second specific gravity of the second primary color in the predetermined time ratio is increased by B1, and the second is increased. The primary color light is modulated as a light source of two frames of monochrome images, respectively: a first primary color, a second primary color, a second primary color, and a third primary color, wherein the pixel is in the four-frame monochrome image The grayscale values are: N1 × (1-B2), N2, N2 × B1, N3.

It can be understood that, in an embodiment, the projection system 100 may not modulate the relatively heavy light as a light source of two frames of images, and control the light modulating device 50 according to the time period during which the light emitting device 10 emits the first primary color light. The first primary color light acquired by the image analysis module 76 is image-modulated at a corresponding input grayscale value of each pixel; and the light modulation device 50 controls the light modulation device 50 according to the image analysis mode during a period in which the illumination device 10 emits the second primary color light. The second primary color light acquired by the group 76 is image-modulated at a corresponding input grayscale value of each pixel; during the period in which the illumination device 10 emits the third primary color light, the control light modulation device 50 acquires according to the image analysis module 76. The third primary color light is image modulated at a corresponding input grayscale value at each pixel. For example, the red, blue, and green luminance values of a certain pixel point acquired by the image analysis module 76 are: 250, 100, and 200, and the user selects the red light increase mode, and the red color wheel is red by default in the red light increase mode. The proportion of the light exiting section and the blue light exiting section is set to 2:1, and the control light modulating device 50 modulates according to the grayscale value of 250 during the period in which the color wheel module 30 emits red light, and controls the light modulating device 50 to be colored. The wheel module 30 modulates according to a grayscale value of 100 during a period in which the blue light is emitted.

Referring to FIG. 6 , a second embodiment of the present invention provides a projection system 200 including a light emitting device 81 , a light modulating device 83 , a control module 84 , a light output mode acquiring device 86 , and a storage module 87 . The light-emitting device 81 is substantially the same as the light-emitting device 10 provided by the first embodiment of the present invention, and the light-modulating device 83 is substantially the same as the light-modulating device 50 provided by the first embodiment of the present invention.

The control module 84 is configured to control the operation of the light emitting device 81 and the light modulating device 83.

The light output mode obtaining device 86 is configured to acquire a light output mode. The light-emitting device 81 corresponding to the different light output modes outputs a different time ratio of the first primary color light to the second primary color light.

The storage module 87 pre-stores a plurality of light output modes, and each of the light output modes corresponds to a time ratio of the light-emitting device 81 outputting the first primary light and the second primary light. For example, the light output mode includes softness, naturalness, highlighting, etc., wherein when the light output mode is soft, the preset time ratio of the first primary color light to the second primary color light is 1:1; When the output mode is natural, the preset time ratio of the first primary color light to the second primary color light is 1.2:1; wherein the first primary color light and the second when the light output mode is highlighted The preset time of the primary light is 2:1.

The control module 84 is further configured to perform a search and comparison on the plurality of light output modes pre-stored in the storage module 87 according to the light output mode acquired by the light output mode acquiring device 86, and control the The light-emitting device 81 outputs a time ratio of the first primary color light to the second primary color light according to a time ratio of the corresponding light output mode.

For example, when the light output mode acquired by the light output mode acquiring device 86 is soft, the control module 84 pre-stores in the storage module 87 according to the light output mode acquired by the light output mode acquiring device 86. The various light output modes are searched and compared, and the time ratio of the first primary color light to the second primary light output by the illumination device 10 according to the soft light output mode is controlled to be 1:1.

It can be understood that the projection system 200 can omit the storage module 87 and store the time ratio of the first primary color light and the second primary color light corresponding to the plurality of light output modes in the light output mode acquiring device 86 to one. External storage device.

The color wheel module 30, the light-emitting device (10, 81), the projection system (100, 200) and the control method provided by the present invention adjust the area of the color wheel module 30 to emit the first primary color light and The region of the second primary light is emitted such that the time ratio of the first primary light to the second primary light of the illumination device (10, 81) is adjustable for convenient use. Further, since the primary color light and the second primary color light which are output from the light-emitting device 10 are relatively heavy, the primary color light is modulated as a light source of two frames of monochrome images, and a four-frame monochrome image is synthesized and outputted. The frame color image improves the brightness of the primary color of the first primary color light and the second primary color light in the projected display image, thereby improving the overall display quality.

It is to be understood that those skilled in the art can make other variations and the like in the spirit of the present invention for use in the design of the present invention as long as it does not deviate from the technical effects of the present invention. All changes made in accordance with the spirit of the invention are intended to be included within the scope of the invention.

Claims (20)

A color wheel module, characterized in that the color wheel module comprises

a first color wheel comprising a first primary color region and a transparent region;

a second color wheel, after the exiting optical path of the transparent region of the first color wheel, includes a first primary color region and a transparent region;

a driving device, configured to drive the first color wheel and the second color wheel to rotate synchronously around the same axis;

a region where a first primary color region of the first color wheel and the second color wheel coincides with a projection of a transparent region of the other in the axial direction, and a first primary color of the first color wheel a region in which the projection of the region and the first primary color region of the second color wheel coincides in the axial direction is combined into an area in which the color wheel module emits light of the first primary color under illumination of the light source;

An area in which the transparent area of the first color wheel overlaps with the projection of the transparent area of the second color wheel in the axial direction constitutes the color wheel module emitting the second primary color light under illumination of the light source region;

An adjusting device, configured to adjust a rotation of the first color wheel or the second color wheel by a predetermined angle to control the area of the color wheel module that emits the first primary color light and the light that emits the second primary color light The area is in a predetermined area.

2. A color wheel module according to claim 1, wherein said first color wheel or said second color wheel further comprises a third primary color region, said first color wheel and said second color wheel A region in which the projection of the third primary color region and the transparent region of the other coincides in the axial direction constitutes a region in which the color wheel module emits light of the third primary color under illumination of the light source.

3. A color wheel module according to claim 1, wherein said first color wheel and said second color wheel are disposed in close proximity, and there is no gap between said first color wheel and said second color wheel .

4. The color wheel module according to claim 3, wherein the area of the first color wheel other than the transmissive area and the area of the second color wheel other than the transmissive area are reflective areas, The light exit side of the reflective area is the same as the light incident side.

5. The color wheel module of claim 1 wherein there is a predetermined distance between the first color wheel and the second color wheel.

6. The color wheel module according to claim 5, wherein the area of the first color wheel other than the transmissive area and the area of the second color wheel other than the transmissive area are transmissive areas, The light exit side of the transmissive area is different from the light incident side;

The color wheel module further includes a focusing lens between the first color wheel and the second color wheel, and the light emitted by the first color wheel is collected by the focusing lens to have a spot of a predetermined size Projected onto the second color wheel.

7. The color wheel module of claim 1 wherein said first primary color region carries a red phosphor.

8. A lighting device comprising a light source and a color wheel module according to any of claims 1-7.

A projection system comprising the illumination device, the light modulation device and the control module according to claim 8, wherein the light modulation device is configured to receive the first primary color light and the second primary color light according to the input image The data is image-modulated for the first primary color light and the second primary color light; the control module is configured to control a time ratio of the first primary color light and the second primary color light output by the illumination device.

10. A projection system, comprising:

a light emitting device, configured to output at least a first primary color light and a second primary color light according to a time sequence;

a light modulating device, configured to receive the first primary color light and the second primary color light, and perform image modulation on the first primary color light and the second primary color light according to input image data;

And a control module, configured to control a time ratio of the first primary color light and the second primary color light output by the illumination device.

The projection system according to claim 10, wherein in the image modulation for synthesizing and outputting one frame of color image, the control module controls time occupation of the first primary color light and the second primary color light The relatively heavy primary light is modulated as a source of two frames of monochrome images.

The projection system of claim 10, wherein the projection system further comprises a ratio acquisition module, wherein the ratio acquisition module is configured to acquire the first primary color light and the output of the illumination device The preset time ratio of the two primary colors of light is used to adjust the actual time ratio of the first primary color light and the second primary color light output by the illumination device to a preset time ratio.

The projection system of claim 12, wherein the projection system further comprises an image analysis module, wherein the image analysis module is configured to acquire a first primary color and a first color of each pixel of each frame input image. The input grayscale value of the two primary colors.

The projection system according to claim 13, wherein the control module is configured to obtain an original time ratio of the first primary color light and the second primary color light in a composite output one-frame color image. Obtaining, by the first primary color, a first specific gravity that increases or decreases relative to the original time ratio in the preset time ratio, and acquiring the second primary color light in the preset time ratio a second specific gravity that increases or decreases with respect to the original time ratio, and calculates, according to the first specific gravity, the second specific gravity, and the input grayscale value, a monochrome of each frame when a composite color image is outputted An output grayscale value of each pixel of the image, and controlling the light modulation device to modulate the image according to the output grayscale value.

The projection system according to claim 14, wherein the input gray scale values of the first primary color and the second primary color of a certain pixel of the input image data are respectively N1 and N2, and the first a first specific gravity increased by a primary color in the predetermined time ratio relative to the original time ratio B1, and the second primary color light is occupied in the preset time ratio relative to the original time The second specific gravity of the reduced ratio is B2, and the monochromatic images of the composite output one-frame color image are the first primary color image, the first primary color image, and the second primary color image, respectively, and the grayscale values of the corresponding pixel points in the monochrome image are respectively It is N1, N1 × B1, N2 × (1-B2).

The projection system according to claim 14, wherein the input first gray color and the second primary color of the pixel of the input image are respectively N1 and N2, and the first a first specific gravity of the base color light reduced in the predetermined time ratio relative to the original time ratio is B2, and the second primary color light is proportional to the original time ratio in the preset time ratio The increased second specific gravity is B1, and the monochromatic images of the composite output one-frame color image are respectively the first primary color image, the first primary color image, and the second primary color image, and the grayscale values of the corresponding pixel points in the monochrome image are respectively N1 × (1-B2), N2, N2 × B1.

The projection system according to claim 10, wherein the input image data comprises an input grayscale value of a first primary color and a second primary color of each pixel of each frame input image;

The control module is further configured to output a synchronization signal to the light modulation device according to a time ratio of the first primary color light to the second primary color light, such that the illumination device emits the first primary color light within a period of time And the light modulating device modulates the first primary color light according to a corresponding input gray scale value of each pixel point of the first primary color, and the time period in which the illuminating device emits the second primary color light The light modulating means modulates the second primary color light according to a respective input gray scale value of each of the pixel points of the second primary color.

The projection system according to any one of claims 10 to 17, wherein the first primary color is red, the first primary color light is red light, and the second primary color is blue, The second primary color light is blue light.

19. The projection system of claim 10, wherein the projection system further comprises:

a light output mode acquiring device, configured to acquire a light output mode, wherein the light-emitting device corresponding to the different light output modes outputs a different time ratio of the first primary color light and the second primary color light;

The control module controls a time ratio of the first primary color light and the second primary color light to be output by the light emitting device according to a time ratio corresponding to the light output mode acquired by the light output mode acquiring device.

20. The projection system according to any one of claims 1 to 10, wherein the light emitting device comprises a light source and the color wheel module according to any one of claims 1 to 7;

The control module is configured to output a control signal to the adjusting device, and the adjusting device adjusts a rotation angle of the first color wheel or the second color wheel according to the control signal, so that the color wheel mode The region of the group that emits the first primary color light and the region from which the second primary color light is emitted have a predetermined area ratio, such that the time of the first primary color light output by the illumination device and the second primary color light is proportional.