TWI584047B - Projector and projecting method using the same - Google Patents

Description

Projector and projection method using the same

The present invention relates to a projector and a projection method using the same, and more particularly to a projector in which two projection lights do not overlap in time series and a projection method using the same.

The light source of a conventional projector emits a color of a specific light color. When the specific color light is excited by the fluorescent region of the color wheel, it is converted into color light of different light colors and projected onto the screen. When a specific color light penetrates the penetration area of the color wheel, the specific color light is also projected onto the screen.

However, based on the design or manufacturing problems of the light source, the specific color light emitted by the light source tends to deviate from the expected light color, resulting in a color shift of the displayed image.

Therefore, there is an urgent need to propose a new technology to improve this conventional problem.

Therefore, the present invention provides a projector and a projection method using the same, which can improve the conventional problem.

According to an embodiment of the invention, a projector is proposed. The projector includes a first light source, a color wheel and a second light source. The first light source is used to issue the first Shade. The color wheel includes at least one penetration zone and at least one fluorescent reflection zone. The second light source is for emitting a second color light. Wherein, the color wheel is located on a first optical path of the first color light, and the first color light passes through at least one penetration region of the color wheel to become a third color light, and the first color light is reflected by at least one fluorescent light of the color wheel. After the area is reflected, it becomes a fourth color light, and the second color light and the third color light are guided to a projection direction and mixed to become a first projection light, and the fourth color light is guided to the projection direction to become a second projection light, and the first projection light is The second projected light does not overlap in timing.

According to another embodiment of the present invention, a projection method is proposed. The projection method includes the following steps. A projector is provided, the projector comprising a first light source, a second light source and a color wheel. The color wheel comprises at least one penetration zone and at least one fluorescent reflection zone, the color wheel is located on a first optical path of a first color light; the first light source emits a first color light, wherein the first color light passes through the color wheel After the light reflection area is reflected, it becomes a fourth color light; the fourth color light is guided to become a second projection light; the first light source emits the first color light, wherein the first color light passes through at least one penetration area of the color wheel. Forming a third color light; the second light source emits a second color light; guiding the second color light and the third color light to be mixed into a first projection light, wherein the second projection light and the first projection light are not in time series overlapping.

In order to better understand the above and other aspects of the present invention, the preferred embodiments are described below, and in conjunction with the drawings, the detailed description is as follows:

100, 200, 300‧‧‧ projector

105‧‧‧First light source

110‧‧‧second light source

115‧‧‧First color wheel

120‧‧‧Second color wheel

125‧‧‧Light pipes

130‧‧‧First lens group

135‧‧‧Digital Microscope

140‧‧‧second lens group

145‧‧‧ screen

150‧‧‧ third lens group

155‧‧‧Second dichroic mirror

160‧‧‧First mirror

165‧‧‧First dichroic mirror

170‧‧‧second mirror

D1‧‧‧ projection direction

L1‧‧‧first color light

L2‧‧‧Second shade

L3‧‧‧ third color light

L4‧‧‧ fourth color light

P1‧‧‧first projected light

P2‧‧‧second projected light

R1‧‧‧Fluorescent reflection zone

S102, S104, S106, S108, S110, S112‧‧‧ steps

T1‧‧‧ penetration zone

FIG. 1A illustrates a projector in a first timing according to an embodiment of the invention. schematic diagram.

FIG. 1B is a schematic diagram showing the projector of FIG. 1A in a second timing.

FIG. 1C is a flow chart showing a projection method of the projector of FIG. 1A.

FIG. 2A is a schematic diagram showing the projector in a first timing according to another embodiment of the present invention.

FIG. 2B is a schematic diagram showing the projector of FIG. 2A in a second timing.

FIG. 3A is a schematic diagram showing the projector in a first timing according to another embodiment of the present invention.

FIG. 3B is a schematic diagram showing the projector of FIG. 3A in a second timing.

Please refer to FIGS. 1A and 1B . FIG. 1A is a schematic diagram showing the projector 100 in a first timing according to an embodiment of the present invention, and FIG. 1B is a schematic diagram showing the projector 100 in FIG. 1A in a second timing. .

The projector 100 includes a first light source 105, a second light source 110, a first color wheel 115, a second color wheel 120, a light pipe 125, a first lens group 130, a digital micromirror display (DMD) 135, and a first The second lens group 140, the third lens group 150, the second dichroic mirror 155, the first mirror 160, the first dichroic mirror 165, and the second mirror 170.

The first light source 105 can project a first color light L1 (shown in dashed lines). The first light source 105 is, for example, a blue laser light emitter, and thus the first color light L1 is a blue light laser. In an embodiment, the wavelength of the first color light L1 is, for example, between about 420 nm and about 450 nm. The second light source 110 can project a second color light L2 (shown in solid lines). The second light source 110 is, for example, a light emitting diode, such as a green light diode, such that The dichromatic light L2 is green light. The wavelength of the second color light L2 is, for example, from about 490 nm to about 530 nm. Further, the first color light L1 may be a color light other than the blue light, and the second color light L2 may be a color light other than the green light. The color color selection of the second color light L2 may be determined according to the light color of the first color light L1 and/or the light color of the first color light P1, which is not limited in the embodiment of the present invention.

In addition, the second light source 110 can be a light emitting diode package including a diode (not shown) and a wavelength conversion layer (not shown) covering the diode, and the wavelength conversion layer can be a diode. The light is converted into a second color light L2. Alternatively, the second light source 110 itself emits color light different from the second color light, and the color light is converted into the second color light L2 after passing through a wavelength conversion element, wherein the wavelength conversion element is disposed separately from the second light source 110 and is not in contact with each other. .

The first color wheel 115 includes at least one penetration zone T1 and at least one fluorescent reflection zone R1. The penetrating region T1 allows the first color light L1 to directly penetrate and maintain the primary color light, and the fluorescent reflecting region R1 can change the wavelength of the first color light L1 to change the first color light L1 to a fourth color light L4 of a different light color. And reflecting the fourth color light L4.

The fluorescent reflection region R1 is, for example, at least one of a red light reflection region, a green light reflection region, a blue light reflection region, and a yellow light reflection region. The first color wheel 115 is located on the first optical path of the first color light L1. The first color wheel 115 is rotatable such that the penetration area T1 and the fluorescent reflection area R1 are aligned with the first color light L1 at different timings. For example, in the first timing, as shown in FIG. 1A, the first color wheel 115 is aligned with the first color light L1 by the fluorescent reflection area R1, and at the second timing, as shown in FIG. 1B, The one color wheel 115 is aligned with the first color light L1 with the penetration area T. The first timing and the second timing are different second timings, which can In the continuation relationship, or other timings.

As shown in FIG. 1A, at the first timing, the first color light L1 is reflected by the fluorescent reflection region R1 of the first color wheel 115 to become the fourth color light L4 (shown by a broken line). The fourth color light L4 is guided to the projection direction D1 to become the second projection light P2. Then, the second projection light P2 sequentially passes through the second color wheel 120, the light pipe 125, the first lens group 130, the digital micromirror group 135, and the second lens group 140 to the screen 145 to display a projection picture.

As shown in FIG. 1B, at the second timing, the first color wheel 115 is rotated such that the penetration region T1 is aligned with the first color light L1, so that after the first color light L1 penetrates the penetration region T1, it becomes the first Tri-color light L3 (shown in dashed lines). Next, the second color light L2 and the third color light L3 are guided to a projection direction D1, and then mixed to become the first projection light P1 as shown in FIG. 1B. The first projection light P1 sequentially passes through the second color wheel 120, the light pipe 125, the first lens group 130, the digital micromirror group 135, and the second lens group 140 to the screen 145 to display a projection picture. Since the second color light L2 is mixed with the third color light L3, the second color light L2 can compensate the light color of the third color light L3 (or the first color light L1). The second color light L2 is green light, and the third color light L3 is blue light. For example, the second color light L2 causes the wavelength of the first projected light P1 after the light mixing to include the wavelength range of the third color light L3. The wavelength range of the dichromatic light L2. In detail, even if the projection light deviates from the expected light color due to design or manufacturing limitations or problems of the first light source 105 (such as a blue laser), there is generally a phenomenon of blue purple, through the embodiment of the present invention. The second color light L2 (such as green light) can compensate the light color (such as blue light) of the third color light L3 (or the first color light L1), and compensate the light color of the first projected light P1 after the light mixing to the desired light. color.

Further, as described above, the first projection light P1 and the second projection light P2 do not overlap in timing. In other words, the first projection light P1 and the second projection light P2 are not simultaneously generated, but are generated by the control of the first color wheel 115 at different points in time.

As shown in FIG. 1B, the first color wheel 115 is located on the first optical path of the first color light L1 and the second optical path of the second color light L2, and the second color light L2 and the third color light L3 penetrate the first direction in the opposite direction. The penetration zone T1 of the color wheel 115. Further, in the present embodiment, the second light source 110 may continuously emit the second color light L2 regardless of the rotation angle of the first color wheel 115 or the timing. In another embodiment, when the penetration area T1 of the first color wheel 115 is not aligned with the first color light L1, the second light source 110 may not emit the second color light L2; when the penetration area of the first color wheel 115 When T1 is rotated until the first color light L1 is aligned, the second light source 110 emits the second color light L2.

Hereinafter, an optical element through which the first optical path of the first color light L1, the second optical path of the second color light L2, the third optical path of the third color light L3, and the fourth optical path of the fourth color light L4 pass will be further described.

As shown in FIG. 1A, in the first timing, the first optical path of the first color light L1 may sequentially pass through the third lens group 150 including a mirror, the second dichroic mirror 155, and the first color wheel 115. The fourth optical path of the fourth color light L4 sequentially passes through the first color wheel 115 and the second dichroic mirror 155. The second dichroic mirror 155 has a characteristic of reflecting the first color light L1 but allowing the fourth color light L4 to penetrate, so that the first color light L1 is reflected by the second dichroic mirror 155 to the first color wheel 115, and then by the first color wheel After the fluorescent reflection region R1 of 115 is converted into the fourth color light L4, the fourth color light L4 is reflected by the fluorescent reflection region R1 to the first The two dichroic mirrors 155 then penetrate the second dichroic mirror 155 to the second color wheel 120.

As shown in FIG. 1B, at the second timing, the first optical path of the first color light L1 may sequentially pass through the second dichroic mirror 155 and the penetration region T1 of the first color wheel 115. The third optical path of the third color light L3 sequentially passes through the first mirror 160, the first dichroic mirror 165, the second mirror 170, and the second dichroic mirror 155. Since the first dichroic mirror 165 and the second dichroic mirror 155 all have the characteristic of reflecting the third color light L3, the third color light L3 is sequentially reflected by the first dichroic mirror 165 and the second dichroic mirror 155, and is guided to the projection direction D1.

As shown in FIG. 1B, in the second timing, the second optical path of the second color light L2 sequentially passes through the first dichroic mirror 165, the first mirror 160, the penetration region T1 of the first color wheel 115, and the second two-color. Mirror 155. Both the first dichroic mirror 165 and the second dichroic mirror 155 have characteristics that allow the second color light L2 to penetrate. Therefore, the second color light L2 sequentially penetrates the first dichroic mirror 165 and the second dichroic mirror 155 and is guided to the projection direction D1.

In addition, the first dichroic mirror 165, the second dichroic mirror 155, the first mirror 160 and the second mirror 170 may correspond to the four corner configurations of the quadrilateral. This quadrilateral can be rectangular or square. For example, as shown in FIGS. 1A and 1B, the first dichroic mirror 165 and the second dichroic mirror 155 correspond to a rectangular pair of angular configurations, and the first mirror 160 and the second mirror 170 correspond to another diagonal configuration of the rectangle. The first optical path, the second optical path, the third optical path, and the fourth optical path are implemented. However, the second dichroic mirror 155, the first mirror 160, the first dichroic mirror 165, and the second are not limited in the embodiment of the present invention as long as the first optical path, the second optical path, the third optical path, and the fourth optical path are implemented. The geometric position of the mirror 170 and/or other optical components.

FIG. 1C is a flow chart showing a projection method of the projector 100 of FIG. 1A.

In step S102, the projector 100 described above is provided.

In step S104, as shown in FIG. 1A, at the first timing, the first light source 105 emits the first color light L1, wherein the first color light L1 is reflected by the fluorescent reflection area R1 of the first color wheel 115. It becomes the fourth color light L4.

In step S106, as shown in FIG. 1A, at the first timing, the second dichromatic mirror 155 guides the fourth color light L4 to the second projection light P2 in the projection direction D1.

In step S108, as shown in FIG. 1B, at the second timing, the first light source 105 emits the first color light L1, wherein the first color light L1 penetrates the penetration region T1 of the first color wheel 115 and becomes the first Tricolor light L3.

In step S110, as shown in FIG. 1B, at the second timing, the second light source 110 emits the second color light L2. In an embodiment, regardless of the angle of rotation of the first color wheel 115, the second light source 110 can continue to emit the second color light L2 as shown in FIGS. 1A and 1B. In another embodiment, when the penetration area T1 of the first color wheel 115 is not aligned with the first color light L1, the second light source 110 may not emit the second color light L2; when the penetration area of the first color wheel 115 When T1 is rotated until the first color light L1 is aligned, the second light source 110 emits the second color light L2.

In step S112, the first dichroic mirror 165, the first mirror 160, the second dichroic mirror 155, and the second mirror 170 guide the second color light L2 and the third color light L3 to be mixed in the projection direction D1 to become the first projection light P1. Where the second projection light P2 It does not overlap with the first projection light P1 in timing.

Please refer to FIG. 2A and FIG. 2B. FIG. 2A is a schematic diagram showing the projector 200 in a first timing according to another embodiment of the present invention, and FIG. 2B is a second timing diagram of the projector 200 in FIG. schematic diagram.

The projector 200 includes a first light source 105, a second light source 110, a first color wheel 115, a second color wheel 120, a light pipe 125, a first lens group 130, a digital micromirror group 135, a second lens group 140, and a third The lens group 150, the second dichroic mirror 155, the first mirror 160, the first dichroic mirror 165, and the second mirror 170.

Different from the projector 100, the first color wheel 115 of the projector 200 of the embodiment is not located on the second optical path of the second color light L2, that is, the second color light L2 emitted by the second light source 110 does not pass the first A color wheel 115. In addition, in the embodiment, when the penetration area T1 of the first color wheel 115 is not aligned with the first color light L1, the second light source 110 does not emit the second color light L2, as shown in FIG. 2A; The two projection lights P2 have no chance to be mixed with the second color light L2 without being affected by the second color light L2. As shown in FIG. 2B, when the penetration region T1 of the first color wheel 115 is rotated to align with the first color light L1, the second light source 110 emits the second color light L2.

Hereinafter, an optical element through which the first optical path of the first color light L1, the second optical path of the second color light L2, the third optical path of the third color light L3, and the fourth optical path of the fourth color light L4 pass will be further described.

As shown in FIG. 2A, at the first timing, the first optical path of the first color light L1 sequentially passes through the second dichroic mirror 155 and the first color wheel 115, and the fourth optical path of the fourth color light L4 sequentially passes. The first color wheel 115 and the second dichroic mirror 155. As shown in Figure 2B As shown, in the second timing, the first optical path of the first color light L1 sequentially passes through the second dichroic mirror 155 and the first color wheel 115, and the third optical path of the third color light L3 sequentially passes through the first mirror 160, The second mirror 170, the first dichroic mirror 165 and the second dichroic mirror 155, and the second optical path of the second color light L2 sequentially pass through the first dichroic mirror 165 and the second dichroic mirror 155.

The second color light L2 and the third color light L3 are guided to the projection direction D1 and then mixed into the first projection light P1. Similar to the projector 100 described above, the second color light L2 of the projector 200 according to the embodiment of the present invention can compensate the light color of the third color light L3 (or the first color light L1).

In addition, the first dichroic mirror 165, the second dichroic mirror 155, the first mirror 160 and the second mirror 170 may correspond to the four corner configurations of the quadrilateral. This quadrilateral can be rectangular or square. For example, as shown in FIGS. 2A and 2B, the second dichroic mirror 155 and the second mirror 170 correspond to a rectangular pair of corners, and the first dichroic mirror 165 and the first mirror 160 correspond to another diagonal configuration of the rectangle. . The first optical path, the second optical path, the third optical path, and the fourth optical path are implemented. However, the second dichroic mirror 155, the first mirror 160, the first dichroic mirror 165, and the second are not limited in the embodiment of the present invention as long as the first optical path, the second optical path, the third optical path, and the fourth optical path are implemented. The geometric position of the mirror 170 and/or other optical components.

The projection method of the projector 200 according to the embodiment of the present invention is similar to the flow of the above FIG. 1C. The difference is that, in step S104, when the penetration area T1 of the first color wheel 115 is not aligned with the first color light L1, as shown in FIG. 2A, the second light source 110 does not emit the second color light L2. In step S108, when the penetration area of the first color wheel 115 When T1 is aligned with the first color light L1, as shown in FIG. 2B, the second light source 110 emits the second color light L2.

Please refer to FIGS. 3A and 3B . FIG. 3A is a schematic diagram showing the projector 300 in a first timing according to another embodiment of the present invention, and FIG. 3B is a diagram showing the projector 300 in FIG. 3A in a second timing. schematic diagram.

The projector 300 includes a first light source 105, a second light source 110, a first color wheel 115, a second color wheel 120, a light pipe 125, a first lens group 130, a digital micromirror group 135, a second lens group 140, and a third The lens group 150, the second dichroic mirror 155, the first mirror 160, the first dichroic mirror 165, and the second mirror 170.

Unlike the projector 100 described above, the path of the second optical path of the second color light L2 of the projector 300 of the present embodiment is short. For example, the second optical path of the second color light L2 of the present embodiment can shorten the path length of the second optical path of the second color light L2 without passing through the first mirror 160.

Hereinafter, an optical element through which the first optical path of the first color light L1, the second optical path of the second color light L2, the third optical path of the third color light L3, and the fourth optical path of the fourth color light L4 pass will be further described.

As shown in FIG. 3A, in the first timing, the first optical path of the first color light L1 sequentially passes through the second dichroic mirror 155 and the first color wheel 115, and the fourth optical path of the fourth color light L4 sequentially passes. The first color wheel 115 and the second dichroic mirror 155. Further, in the present embodiment, regardless of the rotation angle of the first color wheel 115, the second light source 110 can continue to emit the second color light L2 as shown in FIGS. 3A and 3B. However, in another embodiment, when the penetration area T1 of the first color wheel 115 is not aligned with the first color light L1, the second light The source 110 may not emit the second color light L2; when the penetration area T1 of the first color wheel 115 is rotated to align with the first color light L1, the second light source 110 emits the second color light L2.

As shown in FIG. 3B, in the second timing, the first optical path of the first color light L1 sequentially passes through the second dichroic mirror 155 and the first color wheel 115, and the third optical path of the third color light L3 sequentially passes through the first The two-color mirror 165, the first mirror 160, the second mirror 170 and the second dichroic mirror 155, and the second optical path of the second color light L2 sequentially passes through the first dichroic mirror 165, the first color wheel 115 and the second dichroic mirror 155.

The second color light L2 and the third color light L3 are guided to the projection direction D1 and then mixed into the first projection light P1. Similar to the projector 100 described above, the second color light L2 of the projector 300 of the embodiment of the present invention can compensate the light color of the third color light L3 (or the first color light L1).

In addition, the first dichroic mirror 165, the second dichroic mirror 155, the first mirror 160 and the second mirror 170 may correspond to the four corner configurations of the quadrilateral. This quadrilateral can be rectangular or square. For example, as shown in FIGS. 3A and 3B, the first dichroic mirror 165 and the second mirror 170 correspond to a rectangular pair of corners, and the second dichroic mirror 155 and the first mirror 160 correspond to another diagonal configuration of the rectangle. . The first optical path, the second optical path, the third optical path, and the fourth optical path are implemented. However, the second dichroic mirror 155, the first mirror 160, the first dichroic mirror 165, and the second are not limited in the embodiment of the present invention as long as the first optical path, the second optical path, the third optical path, and the fourth optical path are implemented. The geometric position of the mirror 170 and/or other optical components.

The projection method of the projector 300 in the embodiment of the present invention is similar to the flow in the above FIG. 1C, and details are not described herein again.

In summary, the projector of the embodiment of the present invention and the projection method using the same, the second color light emitted by the second light source can compensate the color shift of the third color light (or the first color light), and the first projection after the light mixing The light color of light is converted into a desired color light. In addition, the embodiment of the present invention does not limit the position of the second light source as long as it can be mixed with the third color light (or the first color light). In addition, the embodiment of the present invention does not limit the optical path design of the first color light, the second color light, the third color light, and the fourth color light, and may be used as long as the second color light and the third color light (or the first color light) can be mixed. Various optical components, such as mirrors, dichroic mirrors, lenses or any other suitable optical component, are arranged for the optical path. In one embodiment, the second color light is only mixed with the third color light and simultaneously directed to a projection direction to become a first projection light.

In conclusion, the present invention has been disclosed in the above preferred embodiments, and is not intended to limit the present invention. A person skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

100‧‧‧Projector

105‧‧‧First light source

110‧‧‧second light source

115‧‧‧First color wheel

120‧‧‧Second color wheel

125‧‧‧Light pipes

130‧‧‧First lens group

135‧‧‧Digital Microscope

140‧‧‧second lens group

145‧‧‧ screen

150‧‧‧ third lens group

155‧‧‧Second dichroic mirror

160‧‧‧First mirror

165‧‧‧First dichroic mirror

170‧‧‧second mirror

D1‧‧‧ projection direction

L1‧‧‧first color light

L2‧‧‧Second shade

L4‧‧‧ fourth color light

P2‧‧‧second projected light

R1‧‧‧Fluorescent reflection zone

T1‧‧‧ penetration zone

Claims (22)

A projector comprising: a first light source for emitting a first color light; a color wheel comprising at least one penetration region and at least one fluorescent reflection region; and a second light source for emitting a second color light Wherein the color wheel is located on a first optical path of the first color light, and the first color light passes through the at least one penetration region of the color wheel to become a third color light, and the first color light passes through the The at least one fluorescent reflection region of the color wheel reflects a fourth color light, and the second color light is only mixed with the third color light and simultaneously guided to a projection direction to become a first projection light, and the fourth color light is guided. The projection direction is a second projection light, and the first projection light and the second projection light do not overlap in time. The projector of claim 1, wherein the color wheel is located on the first optical path of the first color light and a second optical path of the second color light, and the second color light and the three color light are The opposite direction penetrates the at least one penetration zone of the color wheel. The projector of claim 2, wherein the second light source continuously emits the second color light regardless of a rotation angle of the color wheel. The projector of claim 1, wherein the color wheel is not located on a second optical path of the second color light. The projector of claim 2, wherein the second light source does not emit the second color light when the at least one penetration region of the color wheel is not aligned with the first color light; The second light source emits the second color light when the color wheel rotates until the at least one penetration region is aligned with the first color light. The projector of claim 1, further comprising: a first dichroic mirror located on a second optical path of the second color light, wherein the first dichroic mirror allows the second color light Penetrate but reflect the third color light. The projector of claim 6, further comprising: a second dichroic mirror for reflecting the first color light and the third color light, but allowing the second color light and the fourth color light to penetrate; a first mirror; and a second mirror; wherein the first light path of the first color light sequentially passes through the second dichroic mirror and the color wheel; a third optical path of the third color light sequentially passes a reflection of the first mirror, the first dichroic mirror, the second mirror, and the second dichroic mirror; a second optical path of the second color light sequentially penetrates the first dichroic mirror, the first reflection a mirror, the color wheel and the second dichroic mirror. The projector of claim 7, wherein the first two-color The mirror and the second dichroic mirror correspond to a rectangular pair of angular configurations, and the first mirror and the second mirror correspond to another diagonal arrangement of the rectangle. The projector of claim 6, further comprising: a second dichroic mirror that allows the first color light and the third color light to reflect, but the second color light penetrates; a first mirror; a second mirror; the first optical path of the first color light sequentially passes through the second dichroic mirror and the color wheel; a third optical path of the third color light sequentially passes through the first dichroic mirror, a first mirror, the second mirror and the second dichroic mirror; a second optical path of the second color light sequentially passes through the first dichroic mirror, the color wheel and the second dichroic mirror. The projector of claim 9, wherein the first dichroic mirror and the second mirror correspond to a rectangular pair of angular configurations, and the second dichroic mirror and the first mirror correspond to a rectangular shape Another diagonal configuration. The projector of claim 6, further comprising: a second dichroic mirror for reflecting the first color light, the second color light and the third color light, but allowing the fourth color light to penetrate; a first mirror; and a second mirror; The first optical path of the first color light sequentially passes through the second dichroic mirror and the color wheel; a third optical path of the third color light sequentially passes through the first mirror, the second mirror, and the third optical path a first dichroic mirror and the second dichroic mirror; a second optical path of the second color light sequentially passes through the first dichroic mirror and the second dichroic mirror. The projector of claim 11, wherein the second dichroic mirror and the second mirror correspond to a rectangular pair of angular configurations, and the first dichroic mirror and the first mirror correspond to a rectangular shape. Another diagonal configuration. The projector of claim 1, wherein the first color light is blue light and the second color light is green light. The projector of claim 1, wherein the first light source is a blue laser emitter and the second light source is a light emitting diode. A projection method includes: providing a projector, the projector comprising a first light source, a second light source and a color wheel, the color wheel comprising at least one penetration zone and at least one fluorescent reflection zone, the color wheel is located at a a first light path of the first color light; the first light source emits the first color light, wherein the first color light is reflected by the fluorescent reflection area of the color wheel to become a fourth color light; guiding the fourth color The color light becomes a second projection light toward the projection direction; The first light source emits the first color light, wherein the first color light passes through the at least one penetration region of the color wheel to become a third color light; the second light source emits a second color light; and guides the first color light The dichromatic light is only mixed with the third color light and simultaneously becomes a first projection light in a projection direction, wherein the second projection light does not overlap with the first projection light in time series. The projection method of claim 15, further comprising: guiding the second color light and the three color lights to penetrate the at least one penetration region of the color wheel in opposite directions. The projection method of claim 16, wherein in the step of emitting the second color light by the second light source, the second light source continuously emits the second color light regardless of the rotation angle of the color wheel. The projection method of claim 15, wherein the color wheel is not located on a second optical path of the second color light. The projection method of claim 16 or claim 18, wherein the step of emitting the second color light by the second light source comprises: when the at least one penetration region of the color wheel is not aligned with the first color light The second light source does not emit the second color light; The second light source emits the second color light when the color wheel rotates until the at least one penetration region is aligned with the first color light. The projection method of claim 15, wherein the projector further comprises: a first dichroic mirror located on a second optical path of the second color light, wherein the first dichroic mirror allows the second color light to pass through Passing through, but reflecting the third color light; a second dichroic mirror for reflecting the first color light and the third color light, but allowing the second color light and the fourth color light to penetrate; a first mirror; a second mirror; the first optical path of the first color light sequentially passes through the second dichroic mirror and the color wheel; a third optical path of the third color light sequentially passes through the first mirror, a first dichroic mirror, the second mirror and the second dichroic mirror; a second optical path of the second color light sequentially passes through the first dichroic mirror, the color wheel and the second dichroic mirror. The projection method of claim 15, wherein the projector further comprises: a first dichroic mirror located on a second optical path of the second light source, wherein the first dichroic mirror allows the second color light to pass through Passing through, but reflecting the first color light; a second dichroic mirror for reflecting the first color light and the third color light, but allowing the second color light to penetrate; a first mirror; and a second mirror; wherein the first light path of the first color light sequentially passes through the second dichroic mirror and the color wheel; a third optical path of the third color light sequentially passes The first dichroic mirror, the first mirror, the second mirror and the second dichroic mirror; a second optical path of the second color light sequentially passes through the first dichroic mirror, the color wheel and the second bicolor mirror. The projection method of claim 15, wherein the projector further comprises: a first dichroic mirror located on a second optical path of the second color light, wherein the first dichroic mirror allows the second color light to pass through Passing through, but reflecting the first color light; a second dichroic mirror for reflecting the first color light, the second color light and the third color light, but allowing the fourth color light to penetrate; a first mirror; And a second mirror; the first optical path of the first color light sequentially passes through the second dichroic mirror and the color wheel; a third optical path of the third color light sequentially passes through the first mirror, The second mirror, the first dichroic mirror and the second dichroic mirror; a second optical path of the second color light sequentially passes through the first dichroic mirror and the second dichroic mirror.