CN211741818U

CN211741818U - Illumination system and projection apparatus

Info

Publication number: CN211741818U
Application number: CN202020165502.0U
Authority: CN
Inventors: 潘浩炜
Original assignee: Coretronic Corp
Current assignee: Coretronic Corp
Priority date: 2020-02-13
Filing date: 2020-02-13
Publication date: 2020-10-23
Anticipated expiration: 2030-02-13

Abstract

An illumination system, comprising: the device comprises a first laser light source, a second laser light source and a wavelength conversion module. The first laser light source provides a first laser beam in a first period and a third period. The wavelength conversion module is located on a transmission path of the first laser beam, wherein the wavelength conversion module is provided with at least one wavelength conversion area, at least one non-conversion area, a first standby area and a second standby area. The wavelength conversion module is used for rotating by taking a rotating shaft as a center, so that the wavelength conversion area, the first standby area, the non-conversion area and the second standby area sequentially rotate along one direction, and the wavelength conversion area and the non-conversion area are cut into a transmission path of the first laser beam in turn. A projection device is also provided. The utility model provides an illumination system and projection arrangement can provide the display screen who has good quality.

Description

Illumination system and projection apparatus

Technical Field

The present invention relates to an optical system and an optical apparatus, and more particularly, to an illumination system and a projection apparatus.

Background

Recently, projection apparatuses mainly including solid-state light sources such as light-emitting diodes (LEDs) and laser diodes (laser diodes) have been in the market. Generally, the excitation light of these solid-state light sources is converted by the wavelength conversion material on the wavelength conversion module in the projection apparatus to generate converted light with different colors. In order to meet the requirement of color expression, a light filtering module is disposed on the rear section of the light path of the projection device, and the converted light on the wavelength conversion module filters out predetermined color light after passing through the light filtering module. The color lights are modulated by the light valve to project the image beam to the outside.

Generally, since the wavelength conversion element of the wavelength conversion module has a boundary between the wavelength conversion region and the non-conversion region, when the excitation light is incident near the boundary region, a part of the excitation light is located in the wavelength conversion region, and a part of the excitation light is located in the non-conversion region, this state is generally called spoke (spoke) state, and a color cast phenomenon occurs. This is because the wavelength conversion element continues to rotate, so the proportion of the excitation light incident on the wavelength conversion region and the non-conversion region changes with time, and thus the light beam exiting the wavelength conversion element forms converted light and non-converted light with unstable intensity. Therefore, when the wavelength conversion element is turned to the radial state, the light valves in operation in the projection apparatus are all temporarily turned off (off) to avoid the generation of different colors in the image. However, this causes the projection apparatus to lose the brightness of the display screen.

In addition, in order to increase the color update rate of the projection apparatus, reduce the occurrence of color break phenomenon (color break) in the visual perception of human eyes, and further achieve smoother viewing quality, many of the known projection apparatuses adopt technical measures such as increasing the number of rotations of the wavelength conversion element and increasing the number of partitions of the wavelength conversion region and the non-conversion region on the wavelength conversion element. However, since the number of partitions between the wavelength conversion region and the non-conversion region is increased and the frequency of the passing state is also increased, the color update rate of the projection apparatus and the number of the wavelength conversion region and the non-conversion region are limited to maintain a certain brightness of the display screen.

The background section is only provided to aid in understanding the present invention, and therefore the disclosure in the background section may include some known techniques which do not constitute a part of the knowledge of those skilled in the art. The disclosure in the "background" section does not represent that content or the problems which may be solved by one or more embodiments of the present invention are known or appreciated by those skilled in the art prior to the filing of the present application.

SUMMERY OF THE UTILITY MODEL

The utility model provides a lighting system can provide the display screen who has good quality.

The utility model provides a projection device can provide the display screen who has good quality.

Other objects and advantages of the present invention can be further understood from the technical features disclosed in the present invention.

To achieve one or part of or all of the above or other objects, an embodiment of the present invention provides an illumination system. The illumination system is for providing an illumination beam, and the illumination system comprises: the device comprises a first laser light source, a second laser light source and a wavelength conversion module. The first laser light source provides a first laser beam in a first period and a third period. The second laser light source provides a second laser beam in the second period and the fourth period. The wavelength conversion module is positioned on a transmission path of the first laser beam, wherein the wavelength conversion module is provided with at least one wavelength conversion area and at least one non-conversion area, a first standby area and a second standby area are arranged between the at least one wavelength conversion area and the at least one non-conversion area, and the wavelength conversion module is used for rotating by taking a rotating shaft as a center so as to enable the at least one wavelength conversion area, the first standby area, the at least one non-conversion area and the second standby area to rotate along a direction in sequence and enable the at least one wavelength conversion area and the at least one non-conversion area to cut into the transmission path of the first laser beam in turn. When the wavelength conversion module rotates, in a first time period, the first laser beam enters at least one non-conversion area of the wavelength conversion module to form first color light, in a second time period and a fourth time period, the second laser beam forms second color light, in a third time period, the first laser beam enters the wavelength conversion area of the wavelength conversion module to form third color light, in the second time period and the fourth time period, the first standby area and the second standby area respectively correspond to a transmission path formed by the first laser beam in the first time period or the third time period, and no facula formed by the first laser beam exists on the wavelength conversion module.

In order to achieve one or a part of or all of the above or other objects, an embodiment of the present invention provides a projection apparatus. The projection device comprises the illumination system, the light valve and the projection lens. The light valve is located on the transmission path of the illumination beam and is used for converting the illumination beam into an image beam. The projection lens is located on the transmission path of the image light beam and is used for projecting the image light beam out of the projection device.

Based on the above, the embodiments of the present invention have at least one of the following advantages or effects. The embodiment of the present invention provides an illumination system and a projection apparatus, which can form desired color lights at different time intervals by the arrangement of the first laser source, the second laser source and the wavelength conversion module, and can avoid generating the picture color difference phenomenon caused by the spoke (spoke) state, thereby maintaining the brightness of the display picture. In addition, the projection apparatus and the illumination system can omit the configuration of the filter module, so that the loss of brightness can be reduced, and the output ratio of the three primary colors (RGB Color Light output transmittance, CLO) of 100% can be achieved. Furthermore, in the embodiment of the present invention, the illumination system and the projection apparatus can simply switch the on/off states of the first laser source and the second laser source without limitation, so as to improve the color update rate of the projection apparatus, and thereby eliminate the occurrence of color break, and further achieve smoother viewing quality.

In order to make the aforementioned and other features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic structural diagram of a projection apparatus according to an embodiment of the present invention.

Fig. 2A is a top view of one of the wavelength conversion modules of fig. 1.

Fig. 2B is a graph showing transmittance of the first light splitting element of fig. 1 for light of different wavelength bands.

Fig. 2C is a graph of transmittance of the second beam splitting element of fig. 1 for light of different wavelength bands.

Fig. 2D is a timing diagram of the first laser source, the second laser source, the wavelength conversion module and the light valve in fig. 2A in different periods.

Fig. 3A and 3B are top views of different wavelength conversion modules of fig. 1.

Fig. 4A-4C are top views of different wavelength conversion modules of fig. 1.

Fig. 5A is a schematic structural diagram of another projection apparatus according to an embodiment of the present invention.

Fig. 5B is a graph showing transmittance of light of different wavelength bands for the second light splitting region of the first light splitting element of fig. 1.

Fig. 6A is a schematic diagram of a structure of another projection apparatus according to an embodiment of the present invention.

Fig. 6B is a graph showing transmittance of the first light splitting element of fig. 6A for light of different wavelength bands.

Fig. 6C is a graph of transmittance of the second beam splitting element of fig. 6A for light of different wavelength bands.

Fig. 6D is a graph showing transmittance of the third light splitting element of fig. 6A for light of different wavelength bands.

Fig. 6E is a timing diagram of the first laser source, the second laser source, the third laser source, the wavelength conversion module and the light valve in fig. 6A in different periods.

Fig. 7A is a schematic diagram of a structure of another projection apparatus according to an embodiment of the present invention.

Fig. 7B is a top view of one of the wavelength conversion modules of fig. 7A.

Detailed Description

The foregoing and other features, aspects and utilities of the present invention will be apparent from the following more particular description of preferred embodiments of the invention, as illustrated in the accompanying drawings. Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Accordingly, the directional terminology is used for purposes of illustration and is in no way limiting.

Fig. 1 is a schematic structural diagram of a projection apparatus according to an embodiment of the present invention. Fig. 2A is a top view of one of the wavelength conversion modules of fig. 1. Fig. 2B is a graph showing transmittance of the first light splitting element of fig. 1 for light of different wavelength bands. Fig. 2C is a graph of transmittance of the second beam splitting element of fig. 1 for light of different wavelength bands. Fig. 2D is a timing diagram of the first laser source, the second laser source, the wavelength conversion module and the light valve in fig. 2A in different periods. Referring to fig. 1, a projection apparatus 200 includes an illumination system 100, a light valve 210, and a projection lens 220. The illumination system 100 is adapted to provide an illumination beam 70. The light valve 210 is disposed on a transmission path of the illumination beam 70 and adapted to convert the illumination beam 70 into the image beam 80. The projection lens 220 is disposed on the transmission path of the image beam 80 and adapted to project the image beam 80 out of the projection apparatus 200 to form an image frame. In the embodiment, the number of the light valves 210 is one, but the invention is not limited thereto, and in other embodiments, the number of the light valves 210 may be multiple. In addition, in the present embodiment, the light valve 210 may be a digital micro-mirror device (DMD) or a Liquid Crystal On Silicon (LCOS) panel. However, in other embodiments, the light valve 210 may be a transmissive liquid crystal panel or other light beam modulator.

Specifically, as shown in fig. 1, in the present embodiment, the illumination system 100 includes a first laser light source 110B, a second laser light source 110R, a wavelength conversion module 120, a light splitting and combining module 130, and a light uniformizing element 140. Further, as shown in fig. 2D, in the present embodiment, the first laser source 110B is turned on during the first period T1 and the third period T3, and turned off during the second period T2 and the fourth period T4, the second laser source 110R is turned off during the first period T1 and the third period T3, and turned on during the second period T2 and the fourth period T4, such that the first laser source 110B provides the first laser beam 50B during the first period T1 and the third period T3, as shown in fig. 1 and fig. 2D. The second laser source 110R provides the second laser beam 50R during the second period T2 and the fourth period T4. For example, in the present embodiment, the first laser beam 50B is a blue laser beam, and the second laser beam 50R is a red laser beam. For example, in the present embodiment, the first laser source 110B may include one or more blue laser diodes arranged in an array, and the second laser source 110R may include one or more red laser diodes arranged in an array, but the invention is not limited thereto.

Specifically, as shown in fig. 1, in the present embodiment, the coupling/combining optical module 130 includes a first light splitting element 131, a light transmitting element LT, and a second light splitting element 132. The light splitting and combining module 130 is located on the transmission path of the first laser beam 50B and the second laser beam 50R, and the first light splitting element 131 is disposed corresponding to the first laser light source 110B and located between the first laser light source 110B and the wavelength conversion module 120. For example, as shown in fig. 2B, in the present embodiment, the first light splitting element 131 can reflect light with a wavelength band in a range of 480 to 590 nanometers, and allow light with a wavelength band below 480 nanometers and light with a wavelength band above 590 nanometers to pass through. In other words, the first light splitting element 131 is, for example, a Dichroic mirror (Dichroic mirror with Green reflection) having Green reflection, and can allow blue light and red light to pass through, thereby providing reflection for Green light. Therefore, the first light splitting element 131 can allow the blue first laser beam 50B to penetrate therethrough, so that the first laser beam 50B of the first laser source 110B can be transmitted to the wavelength conversion module 120 by penetrating through the first light splitting element 131.

On the other hand, as shown in fig. 1, in the present embodiment, the second light splitting element 132 of the combining and multiplexing module 130 is located between the second laser light source 110R and the first light splitting element 131, and the light transmitting element LT is located between the wavelength conversion module 120 and the second light splitting element 132. For example, as shown in fig. 2C, in the present embodiment, the second light splitting element 132 can, for example, allow light with a wavelength band in a range of 470 to 600 nanometers to pass through, and reflect light with a wavelength band below 470 nanometers. In other words, the second beam splitting element 132 is a Dichroic Mirror (Dichroic Mirror) with Blue light reflection for reflecting Blue light and allowing other colors of light (e.g., red and yellow light) to pass through, and the light transmitting element LT is for reflecting visible light, wherein in the embodiment of fig. 1, the light transmitting element LT is, for example, a Mirror or other reflecting element.

Further, as shown in fig. 1 and fig. 2A, in the present embodiment, the wavelength conversion module 120 is located on the transmission path of the first laser beam 50B and is adapted to rotate. Furthermore, as shown in fig. 1 and fig. 2A, the wavelength conversion module 120 includes a rotating shaft 121 and a substrate 122. The shaft 121 is connected to the substrate 122 for driving the substrate 122 to rotate around the shaft. The wavelength conversion module 120 is disposed on the transmission path of the first laser beam 50B, and the substrate 122 of the wavelength conversion module 120 is disposed with at least one non-conversion region NT and at least one wavelength conversion region WR. For example, as shown in fig. 2A, in the present embodiment, the area of the at least one non-converting region NT is the same as the area of the at least one wavelength converting region WR, but the present invention is not limited thereto. In other embodiments, not shown, the area of the at least one non-converting region NT and the area of the at least one wavelength converting region WR may be different.

Specifically, in the present embodiment, at least one non-conversion region NT of the wavelength conversion module 120 is respectively formed by a transparent layer. That is, in the present embodiment, the at least one non-conversion region NT is a light transmission region, and when the at least one non-conversion region NT is located on the transmission path of the first laser beam 50B, the first laser beam 50B can be transmitted through and pass through the subsequent optical element to form the first colored light 70B. On the other hand, at least one wavelength conversion region WR of the wavelength conversion module 120 is respectively formed by a wavelength conversion layer, and can be used for converting the first laser beam 50B into the wavelength conversion beam 60Y. For example, in the embodiment, the wavelength conversion material includes a phosphor capable of exciting a yellow light beam, so that when at least one wavelength conversion region WR is located on the transmission path of the first laser beam 50B, the wavelength conversion beam 60Y formed by the wavelength conversion material irradiated by the first laser beam 50B is yellow.

Further, as shown in fig. 2A, a first standby region IB1 and a second standby region IB2 exist between the at least one wavelength converting region WR and the at least one non-converting region NT. Thus, as shown in fig. 2A, the wavelength conversion region WR and the non-conversion region NT of the wavelength conversion module 120 are respectively one, and when the wavelength conversion module 120 rotates around the rotation shaft 121, the wavelength conversion region WR, the first standby region IB1, the non-conversion region NT and the second standby region IB2 sequentially rotate along a direction CW. For example, in the present embodiment, the direction CW is clockwise. For example, in the present embodiment, the first standby area IB1 or the second standby area IB2 may be a boundary area including the wavelength converting region WR or the non-converting region NT. Specifically, in the present embodiment, as shown in fig. 2A, the first standby region IB1 includes a first boundary B1 between one end of the wavelength converting region WR and one end of the non-converting region NT connected to the one end, and the second standby region IB2 includes a second boundary B2 between the other end of the wavelength converting region WR and the other end of the non-converting region NT connected to the other end.

Further, as shown in fig. 2A and 2D, in the present embodiment, when the wavelength conversion module 120 rotates around the rotation shaft 121, during the second period T2, a portion of the non-conversion region NT adjacent to the first boundary B1, the first boundary B1, and a portion of the wavelength conversion region WR adjacent to the first boundary B1 are sequentially cut into the transmission path of the first laser beam 50B formed only during the on period of the first laser source 110B (i.e., the first period T1 or the third period T3). During the fourth period T4, the portion of the wavelength conversion region WR adjacent to the second boundary B2, the second boundary B2, and the portion of the non-conversion region NT adjacent to the second boundary B2 sequentially cut into the transmission path of the first laser beam 50B formed only during the on period of the first laser source 110B (i.e., the first period T1 or the third period T3).

More specifically, in the present embodiment, the first standby area IB1 or the second standby area IB2 may be an imaginary virtual area, and the position corresponding to the position where the wavelength conversion module 120 cuts into the first laser beam 50B on the transmission path formed by the first time period T1 and the third time period T3 when the first laser source 110B is turned off (i.e. the second time period T2 and the fourth time period T4). That is, the illumination system 100 may control the timing point when the first standby area IB1 or the second standby area IB2 of the wavelength conversion module 120 cuts into the propagation path of the first laser beam 50B corresponding to the second period T2 and the fourth period T4. In the second time period T2 and the fourth time period T4, the corresponding first standby area IB1 and the second standby area IB2 cut into the transmission path formed by the first laser beam 50B, however, since the first laser source 110B is turned off, the first laser beam 50B does not pass through the first standby area IB1 or the second standby area IB2 of the wavelength conversion module 120, and the wavelength conversion module 120 does not have a spot formed by the first laser beam 50B, and further does not generate the image heterochrosis phenomenon caused by the spoke (spoke) state, so the projection apparatus 200 does not need to turn off the light valve 210 during the operation of the light valve 210 to reduce the image heterochrosis phenomenon, and thus the brightness of the displayed image can be maintained.

Furthermore, as shown in fig. 1, fig. 2A and fig. 2D, in the first period T1, the first laser beam 50B forms a light spot on the wavelength conversion module 120, and the light spot is completely located on the non-conversion region NT, that is, the first laser beam 50B can pass through the non-conversion region NT and be sequentially transmitted to the second light splitting element 132 and the first light splitting element 131 through the light transmitting element LT to form the first colored light 70B. On the other hand, as shown in fig. 1 and fig. 2D, in the second period T2 and the fourth period T4, since the second laser source 110R is turned on, the second laser beam 50R provided by the second laser source 110R can penetrate through the second light splitting element 132 and is transmitted to the first light splitting element 131 to form a second color light 70R, wherein the second color light 70R is, for example, a red light.

In addition, in the third period T3, the first laser beam 50B forms a light spot on the wavelength conversion module 120, and the light spot is completely located on the wavelength conversion region WR, so that the wavelength conversion module 120 can convert the first laser beam 50B into a yellow wavelength conversion beam 60Y through the wavelength conversion material, then transmit the wavelength conversion beam 60Y to the first light splitting element 131, and filter the yellow wavelength conversion beam into a third color light 70G with a narrower spectral range through the first light splitting element 131, where the wavelength conversion material includes, for example, a phosphor capable of exciting a yellow light beam, and then the wavelength conversion beam 60Y is, for example, yellow light, and then the third color light 70G is, for example, green light. Moreover, since human eyes are sensitive to the vision of green light, when the purity or brightness of green light is increased, human eyes can also feel that the brightness of the display screen is increased. Thus, the illumination system 100 and the projection apparatus 200 can obtain the third color light 70G (green light) with a narrow spectrum range (i.e., a purer purity) by the arrangement of the first light splitting element 131, thereby contributing to improving the brightness of the display image in human eyes.

On the other hand, as shown in fig. 1, in the present embodiment, the illumination system 100 may further optionally include an optical homogenizing unit OU, and the optical homogenizing unit OU is located on the transmission path of the first laser beam 50B and the second laser beam 50R and between the first light splitting element 131 and the second light splitting element 132. For example, the optical homogenization unit OU may include a light diffusing element, a polarizing element, or a combination of a light diffusing element and a polarizing element.

Further, when the optical homogenizing unit OU includes a light diffusing element, the first laser beam 50B and the second laser beam 50R can generate a light diffusing effect after passing through the rotating optical homogenizing unit OU, and accordingly eliminate the laser spots. When optical homogenization unit OU includes a polarizing element, first laser beam 50B and second laser beam 50R can have different polarization states at different times after passing through rotating optical homogenization unit OU. In this way, the illumination system 100 can be applied to the projection apparatus 200 equipped with the polarization stereo mode, and the phenomenon of uneven screen color or uneven brightness often occurring in the projection apparatus 200 equipped with the polarization stereo mode can be eliminated.

For example, in the conventional illumination system 100, the polarization polarity of the laser beam is destroyed by other internal optical elements, so that the polarization direction and intensity of the laser beam are not uniform, and the brightness of the display image of the projection apparatus 200 equipped with the polarization stereo mode is not uniform. However, in the illumination system 100 of the present embodiment, since the illumination beam 70 and the image beam 80 formed by the first laser beam 50B and the second laser beam 50R have different polarization states at different times, light spots with different polarization states can be formed at different time points. Because of the effect of the persistence of vision, the brightness of the light spots on the irradiated surface observed by human eyes can be the superposed brightness of the light spots at different time points in the persistence of vision, so that the light spots at different time points in the persistence of vision can also generate light spots with more uniform brightness after superposition, thereby enabling a user to view a display picture with uniform color or brightness, and further enabling the user to view a three-dimensional display picture with better uniformity.

Then, as shown in fig. 1, the first color light 70B, the second color light 70R and the third color light 70G are transmitted to the first light splitting element 131 to form the illumination light beam 70. In the embodiment, the first color light 70B is blue light, the second color light 70R is red light, and the third color light 70G is green light, that is, the illumination system 100 can already form the illumination light beam 70 including three primary color lights through the arrangement of the first laser light source 110B, the second laser light source 110R and the wavelength conversion module 120. Therefore, the projection apparatus 200 and the illumination system 100 can omit the configuration of the filter module (filter wheel), thereby reducing the loss of brightness, and can achieve a 100% Output Ratio of three primary colors (RGB Color Light Output Ratio, CLO Ratio)

Next, as shown in fig. 1, in the present embodiment, the light uniformizing element 140 is located on the transmission path of the illumination light beam 70. In the present embodiment, the light-homogenizing element 140 includes an Integration Rod (Integration Rod), but the present invention is not limited thereto. In more detail, as shown in fig. 1, when the illumination light beam 70 is transmitted to the light uniformizing element 140, the light uniformizing element 140 may uniformize the illumination light beam 70 and transmit the uniformized illumination light beam 70 to the light valve 210.

Next, as shown in fig. 1, the light valve 210 is located on the transmission path of the illumination beam 70 from the light uniformizing element 140 and is used for converting the illumination beam 70 into the image beam 80. The projection lens 220 is located on the transmission path of the image beam 80 and is used for projecting the image beam 80 out of the projection apparatus 200 to form an image frame. After the illumination beam 70 is converged on the light valve 210, the light valve 210 can sequentially form the illumination beam 70 into the image beams 80 with different colors and transmit the image beams to the projection lens 220, so that the image frame projected by the image beam 80 converted by the light valve 210 can be a color frame.

Furthermore, in the present embodiment, the first color light 70B is blue light, the second color light 70R is red light, and the third color light 70G is green light, and since the illumination light beam 70 is formed by mixing the first color light 70B, the second color light 70R and the third color light 70G, the color tone or color temperature of the illumination light beam 70 can be determined by the proportional relationship among the first color light 70B, the second color light 70R and the third color light 70G, and the color tone or color temperature of the image light beam 80 formed by the illumination light beam 70 is also determined by the proportional relationship.

More specifically, as the proportion of blue light of the illumination beam 70 is higher, the color temperature of the illumination beam 70 will also be higher. For example, the ratio of the time length of the third time period T3 to the time length of the first time period T1 is between 2 and 4, and the ratio of the time length of the second time period T2 or the fourth time period T4 to the time length of the first time period T1 is between 1 and 2.5. Thus, in the present embodiment, the projection apparatus 200 and the illumination system 100 can adjust the relative proportions of the first color light 70B, the second color light 70R and the third color light 70G of the illumination light beam 70 by the length of the on-period of the first laser light source 110B and the second laser light source 110R and the configuration of the wavelength conversion region WR and the non-conversion region NT of the wavelength conversion module 120, so that the color temperature (color temperature) of the image light beam 80 can be adjusted without adjusting the intensity of the first laser light source 110B or the second laser light source 110R by the illumination system 100 and the projection apparatus 200, and the brightness of the display screen can be prevented from being lost.

In this way, the illumination system 100 and the projection apparatus 200 can form the required color light at different time periods by the arrangement of the first laser source 110B, the second laser source 110R and the wavelength conversion module 120, and can avoid the generation of the picture heterochromatic phenomenon caused by the spoke (spoke) state, thereby maintaining the brightness of the displayed picture. In addition, the projection apparatus 200 and the illumination system 100 can omit the arrangement of the filter module, so that the loss of brightness can be reduced, and the output ratio of the three primary colors can reach 100%.

Fig. 3A and 3B are top views of different wavelength conversion modules of fig. 1. Referring to fig. 3A and 3B, the

wavelength conversion module

320A and 320B of fig. 3A and 3B are similar to the wavelength conversion module 120 of fig. 2A with the following differences. In the embodiment of fig. 2A, the non-conversion region NT and the wavelength conversion region WR of the wavelength conversion module 120 are only one for illustration, but the invention is not limited thereto. In the embodiment of fig. 3A, the number of the non-conversion regions NT and the number of the wavelength conversion regions WR of the wavelength conversion module 320A may be two, while in the embodiment of fig. 3B, the number of the non-conversion regions NT and the number of the wavelength conversion regions WR of the wavelength conversion module 320B may be increased to three. More specifically, one end of a wavelength converting region WR and one end of a non-converting region NT connected to the one end are a first boundary B1, and the first standby region IB1 includes the first boundary B1, the other end of the wavelength converting region WR and one end of another non-converting region NT connected to the other end are a second boundary B2, and the second standby region IB2 includes the second boundary B2; and the other end of the another non-conversion region NT and one end of another wavelength conversion region WR connected to the other end are defined as another first boundary B1. According to the above definition, when the number of the non-conversion regions NT and the wavelength conversion regions WR of the wavelength conversion module 320 increases, the number of the corresponding first standby regions IB1 and the second standby regions IB2 also increases, so the switching frequency of the first laser source 110B and the second laser source 110R also increases, that is, the switching time length also decreases, and thus the time length of the light valve 210 in the cycle section for forming the image beam 80 with blue light, red light, and green light is also reduced. In this way, the color update rate (color update rate) of the image frame of the projection apparatus 200 using the

wavelength conversion modules

320A and 320B can be increased, thereby avoiding the color break phenomenon (color break issue) and achieving a smoother viewing quality. However, due to the limitations of the swing speed of the light valve 210, the switching response time of the first laser source 110B and the second laser source 110R, and the size of the non-conversion region NT and the wavelength conversion region WR of the wavelength conversion module, in other embodiments of the present invention, the number of the non-conversion region NT and the number of the wavelength conversion region WR of the wavelength conversion module can be increased to about ten, respectively.

In the present embodiment, the first standby zone IB1 and the second standby zone IB2 are illustrated as being located between the non-converting zone NT and the wavelength converting zone WR, but the present invention is not limited thereto. In another embodiment, when the wavelength conversion module has a plurality of wavelength conversion regions WR, and two different wavelength conversion regions WR are adjacent to each other, the first standby region IB1 or the second standby region IB2 is disposed between the two wavelength conversion regions WR to eliminate the color difference phenomenon caused by spoke (spoke) state.

Thus, when the illumination system 100 and the projection apparatus 200 employ the wavelength conversion module 320A in fig. 3A or the wavelength conversion module 320B in fig. 3B, in addition to achieving the effects and advantages similar to those of the illumination system 100 and the projection apparatus 200 by achieving the configuration of the first standby region IB1 or the second standby region IB2, the non-conversion region NT and the wavelength conversion region WR of the wavelength conversion module and the numbers of the corresponding first standby region IB1 and the second standby region IB2 can be selectively designed according to the requirement of the user for viewing quality, so as to meet the requirement of the actual color update rate. Therefore, in the embodiment of the present invention, the illumination system 100 and the projection apparatus 200 can also simply switch the on/off states of the first laser source 110B and the second laser source 110R without limitation through the illumination control method, so as to increase the color update rate of the projection apparatus 200, and eliminate the color break phenomenon, thereby achieving a smoother viewing quality.

On the other hand, in the above embodiments, the first standby area IB1 or the second standby area IB2 is exemplified by the boundary area including the wavelength converting area WR or the non-converting area NT, but the present invention is not limited thereto. In other embodiments, the first standby region IB1 or the second standby region IB2 may also be a region of the substrate 122 where the wavelength converting region WR or the non-converting region NT is not actually disposed. It is within the scope of the present invention that any person skilled in the art can modify the configuration of the first standby zone IB1 or the second standby zone IB2 appropriately to achieve the same effects and advantages as the aforementioned projection apparatus 200. Some examples will be given below as an illustration.

Fig. 4A-4C are top views of different wavelength conversion modules of fig. 1. Referring to fig. 4A to 4C, the wavelength conversion module 420A, the wavelength conversion module 420B, and the wavelength conversion module 420C of fig. 4A to 4C are respectively similar to the wavelength conversion module 120, the wavelength conversion module 320A, and the wavelength conversion module 320B of fig. 2A, 3A, and 3B, and the differences are as follows. As shown in fig. 4A to 4C, in the present embodiment, the first standby region IB1 of the

wavelength conversion modules

420A, 420B and 420C includes a first blank region BR1 located between one of the at least one wavelength conversion region WR and one of the at least one non-conversion region NT adjacent thereto, and the second standby region IB2 includes a second blank region BR2 located between one of the at least one wavelength conversion region WR and one of the at least one non-conversion region NT adjacent thereto. As such, when the wavelength conversion module 420A, the wavelength conversion module 420B or the wavelength conversion module 420C rotates, during the second period T2, a portion of the at least one non-conversion region NT adjacent to the first blank region BR1, the first blank region BR1, and a portion of the at least one wavelength conversion region WR adjacent to the first blank region BR1 are sequentially cut into the transmission path of the first laser beam 50B formed only during the on period of the first laser source 110B (i.e., the first period T1 or the third period T3). During the fourth period T4, a portion of the wavelength conversion region WR adjacent to the second blank region BR2, the second blank region BR2, and a portion of the non-conversion region NT adjacent to the second blank region BR2 are sequentially cut into the transmission path of the first laser beam 50B formed only during the on period of the first laser source 110B (i.e., the first period T1 or the third period T3).

Thus, since the first laser source 110B is turned off in the second time period T2 and the fourth time period T4, the first laser beam 50B does not pass through the first standby region IB1 or the second standby region IB2 of the wavelength conversion module 420A, the wavelength conversion module 420B or the wavelength conversion module 420C, and no light spot formed by the first laser beam 50B exists on the wavelength conversion module 420A, the wavelength conversion module 420B or the wavelength conversion module 420C, so that the picture heterochromatic phenomenon caused by spoke (spoke) state is not generated, and therefore, when the wavelength conversion module 420A, the wavelength conversion module 420B or the wavelength conversion module 420C of any one of fig. 4A to 4C is adopted in the illumination system 100 and the projection apparatus 200, the projection apparatus 200 does not need to close the light valve 210 during the operation of the light valve 210 to reduce the picture heterochromatic phenomenon, thereby maintaining the brightness of the display screen.

As such, in the embodiment, when the wavelength conversion module 420A, the wavelength conversion module 420B, or the wavelength conversion module 420C of any one of fig. 4A to 4C is provided, the illumination system 100 may also have the advantages mentioned in the illumination system 100 and the projection apparatus 200 by the arrangement of the wavelength conversion module 420A, the wavelength conversion module 420B, or the wavelength conversion module 420C, which is not described herein again.

On the other hand, in the foregoing embodiment, the non-conversion region NT is exemplified by the light transmission region, but the present invention is not limited thereto. In other embodiments, the non-conversion region NT may also be a light reflection region. It will be appreciated by those skilled in the art, however, that modifications may be made to the optical path design of the illumination system 100 to achieve similar effects and advantages as the projection device 200 described above without departing from the scope of the present invention. Some examples will be given below as an illustration.

Fig. 5A is a schematic structural diagram of another projection apparatus according to an embodiment of the present invention. Fig. 5B is a graph showing transmittance of light of different wavelength bands for the second light splitting region of the first light splitting element of fig. 1. The illumination system 300 and the projection apparatus 400 of fig. 5A are similar to the illumination system 100 and the projection apparatus 200 of fig. 1, and the differences are as follows. Referring to fig. 5A, at least one non-conversion region NT of the wavelength conversion module 120 of the illumination system 300 is respectively formed by a reflective layer. That is, in the present embodiment, at least one of the non-conversion regions NT is a light reflection region capable of reflecting the first laser beam 50B and forming the first colored light 70B through the subsequent optical elements. More specifically, in the present embodiment, the first light splitting element 331 of the light splitting and combining module 330 has a first light splitting region 331a and a second light splitting region 331b, and the light splitting and combining module 330 further includes a condenser lens 333. In detail, in the embodiment, the first light splitting area 331a of the first light splitting element 331 is disposed corresponding to the first laser light source 110B and located between the first laser light source 110B and the wavelength conversion module 120, the second light splitting area 331B of the first light splitting element 331 is located on the transmission path of the first laser beam 50B reflected by the non-conversion area NT of the wavelength conversion module 120, and the second light splitting area 331B is located between the wavelength conversion module 120 and the second light splitting element 132.

Further, in this embodiment, the first light splitting area 331a of the first light splitting element 331 is, for example, a Dichroic Mirror (Dichroic Mirror with Green reflection) having a Green light reflection function, and a relation curve of transmittance of the first light splitting area 331a of the first light splitting element 331 to light of different wavelength bands is the same as a relation curve of transmittance of the first light splitting element 331 to light of different wavelength bands shown in fig. 2B, and therefore, the description thereof is omitted. Thus, the first light splitting region 331a of the first light splitting element 331 is transparent to blue light and provides a reflection effect for green light. In this way, the first laser beam 50B of the first laser source 110B can still pass through the first light splitting region 331a of the first light splitting element 331 and be transmitted to the wavelength conversion module 120.

On the other hand, in the present embodiment, the second light splitting region 331b of the first light splitting element 331 is, for example, a dichroic mirror having a green light reflecting action and partially reflecting blue light by passing through. For example, as shown in fig. 5B, the second light splitting region of the first light splitting element 331 can reflect light with a wavelength band in a range of 480 nm to 590 nm, so that light with a wavelength band below 480 nm has a transmittance of 50% and a reflectance of 50%, and light with a wavelength band above 590 nm can be transmitted. As shown in fig. 5A, when the first laser beam 50B is reflected to the second light splitting area 331B through the non-conversion area NT of the wavelength conversion module 120, a portion of the first laser beam 50B is reflected to one side of the light collecting lens 333 by the second light splitting area 331B of the first light splitting element 331, and another portion of the first laser beam 50B passes through the second light splitting area 331B of the first light splitting element 331 and is transmitted to the second light splitting element 132, and is reflected to the other side of the light collecting lens 333 by the second light splitting element 132. The first laser beams 50B incident on different sides of the condensing lens 333 may be combined by the condensing lens 333 to form the first colored light 70B.

On the other hand, the illumination system 300 can still form the third color light 70G and the second color light 70R through the wavelength converting region WR of the wavelength converting module 120 and the configuration of the second laser source 110R, in this embodiment, the light paths of the third color light 70G and the second color light 70R are the same as the light paths of the third color light 70G and the second color light 70R in the embodiment of fig. 1, and details thereof are not repeated herein.

In this way, the illumination system 300 and the projection apparatus 400 can also form the required color light at different time intervals by the arrangement of the first laser light source 110B, the second laser light source 110R and the wavelength conversion module 120, and can avoid the generation of the picture heterochromatic phenomenon caused by the spoke (spoke) state, so as to maintain the brightness of the display picture, and further have similar effects and advantages of the illumination system 100 and the projection apparatus 200, which are not described herein again.

In addition, as shown in fig. 5A, in the present embodiment, the illumination system 300 may also optionally include an optical homogenizing unit OU, and the optical homogenizing unit OU is located between the first light splitting element 331 and the light homogenizing element 140. Thus, the illumination system 300 can also improve the uniformity of the display by the arrangement of the optical homogenization unit OU.

Fig. 6A is a schematic diagram of a structure of another projection apparatus according to an embodiment of the present invention. Fig. 6B is a graph showing transmittance of the first light splitting element of fig. 6A for light of different wavelength bands. Fig. 6C is a graph of transmittance of the second beam splitting element of fig. 6A for light of different wavelength bands. Fig. 6D is a graph showing transmittance of the third light splitting element of fig. 6A for light of different wavelength bands. Fig. 6E is a timing diagram of the first laser source, the second laser source, the third laser source, the wavelength conversion module and the light valve in fig. 6A in different periods. Referring to fig. 6A, the illumination system 500 and the projection apparatus 600 of the embodiment of fig. 6A are similar to the illumination system 100 and the projection apparatus 200 of fig. 1, and the differences are as follows. As shown in fig. 6A and 6E, in the present embodiment, the illumination system 500 further includes a third laser light source 110G. Specifically, the third laser light source 110G is used to provide the third laser light beam 50G in the fifth period T5. For example, in the present embodiment, the third laser beam 50G is a green laser beam. For example, in the present embodiment, the third laser source 110G may include one or more green laser diodes arranged in an array, but the present invention is not limited thereto.

In detail, as shown in fig. 6E, in the present embodiment, the first laser source 110B is turned on during the first period T1 and the third period T3, and turned off during the second period T2, the fourth period T4 and the fifth period T5, the second laser source 110R is turned on during the second period T2 and the fourth period T4, and turned off during the first period T1, the third period T3 and the fifth period T5, the third laser source 110G is turned on during the fifth period T5, and turned off during the first period T1, the second period T2, the third period T3 and the fourth period T4. In other words, as shown in fig. 6E, only the first laser beam 50B is provided during the first period T1 and the third period T3, only the second laser beam 50R is provided during the second period T2 and the fourth period T4, and only the third laser beam 50G is provided during the fifth period T5.

On the other hand, in the present embodiment, the light splitting and combining module 530 further includes the third light splitting element 533, and the third light splitting element 533 is located between the second light splitting element 532 and the first light splitting element 531, and also located between the second light splitting element 532 and the third laser light source 110G. Specifically, in the present embodiment, the first light splitting element 531 is, for example, a dichroic mirror having a green orange light reflection function, and can allow red light and blue light to pass through, so as to provide a reflection function for the green orange light. For example, as shown in fig. 6B, in the present embodiment, the first light splitting element 531 may reflect light with a wavelength band in a range of 480 to 590 nanometers, and allow light with a wavelength band below 480 nanometers and light with a wavelength band above 590 nanometers to pass through. The second beam splitter 532 is, for example, a dichroic mirror having a blue light (i.e., a light combination of blue light and green light) reflection function, and can allow the red light to pass through and provide a reflection function for the blue light and the green light. For example, as shown in fig. 6C, in the present embodiment, the second light splitting element 532 can reflect light with a wavelength band below 600 nm, and transmit light with a wavelength band above 600 nm. The third dichroic element 533 is, for example, a dichroic mirror having blue and red light reflecting effects, and is capable of allowing the green light to pass through and providing the blue and red light reflecting effects. As shown in fig. 6D, in the present embodiment, the third light splitting element 533 can reflect light with a wavelength band below 470 nm and light with a wavelength band above 630 nm, and allow light with a wavelength band between 470 nm and 630 nm to pass through.

In addition, in the embodiment, the optical homogenizing unit OU is located on the transmission paths of the first laser beam 50B, the second laser beam 50R and the third laser beam 50G, and the wavelength conversion module 120 is also disposed on the transmission path of the third laser beam 50G.

As shown in fig. 6A and 6E, in the first period T1, the non-conversion region NT of the wavelength conversion module 120 cuts into the transmission path of the first laser beam 50B, and the first laser beam 50B can penetrate through the non-conversion region NT of the wavelength conversion module 120, and is sequentially transmitted to the second light splitter 532 and the third light splitter 533 via the light transmission element LT and reflected to the first light splitter 531 to form the first color light 70B. In the third time period T3, the wavelength converting region WR of the wavelength converting module 120 cuts into the transmission path of the first laser beam 50B, and after the first laser beam 50B is converted into the yellow wavelength converting beam 60Y by the wavelength converting region WR of the wavelength converting module 120, the yellow wavelength converting beam 60Y is transmitted to the first light splitting element 531 and filtered into the third color light 70G1 with a narrower spectral range by the first light splitting element 531.

On the other hand, as shown in fig. 6A and 6E, in the second period T2 and the fourth period T4, since the second laser source 110R is turned on, the second laser beam 50R provided by the second laser source 110R can penetrate through the second light splitting element 532 and is reflected by the third light splitting element 533 to the first light splitting element 531, so as to form the second colored light 70R. In the fifth period T5, since the third laser light source 110G is turned on, the third laser light beam 50G provided by the third laser light source 110G can penetrate through the third light splitting element 533, and is reflected to the wavelength conversion module 120 by the second light splitting element 532 and the light transmitting element LT, and then penetrates through the non-conversion region NT of the wavelength conversion module 120 and is transmitted to the first light splitting element 531 to form the fourth color light 70G 2.

In addition, in the embodiment, the projection apparatus 600 and the illumination system 500 can adjust the relative proportions of the first color light 70B, the second color light 70R, the third color light 70G1 and the fourth color light 70G2 of the illumination light beam 70 by the lengths of the turn-on periods of the first laser light source 110B, the second laser light source 110R and the third laser light source 110G and the arrangement of the wavelength conversion region WR and the non-conversion region NT of the wavelength conversion module 120. For example, in the present embodiment, the ratio of the time length of the third period T3 to the time length of the first period T1 is between 0.5 and 1.5, the ratio of the time length of the second period T2 or the fourth period T4 to the time length of the first period T1 is between 0.5 and 1.5, and the ratio of the time length of the fifth period T5 to the time length of the first period T1 is between 1.5 and 3. In this way, the illumination system 500 and the projection apparatus 600 can adjust the color temperature (colorperfect) of the image light beam 80 without adjusting the intensity of the first laser light source 110B or the second laser light source 110R, thereby avoiding the loss of the brightness of the display screen.

Also, in this embodiment, since the fourth color light 70G2 in the illumination light beam 70 is also green light with a narrow spectral range, and the human eye is sensitive to the vision of the green light, when the purity or brightness of the green light increases, the human eye will also perceive the brightness of the display screen to be brighter. In this way, the illumination system 500 and the projection apparatus 600 can also contribute to improving the brightness of the display screen in human eyes by the arrangement of the third laser light source 110G and the first light splitting element 531.

On the other hand, in the embodiment, the illumination system 500 and the projection apparatus 600 can also form the required color light at different time intervals by the arrangement of the first laser source 110B, the second laser source 110R and the wavelength conversion module 120, and can avoid the generation of the picture heterochromatic phenomenon caused by the spoke (spoke) state, so as to maintain the brightness of the display picture, and further have similar effects and advantages of the illumination system 100 and the projection apparatus 200, which are not described herein again.

Fig. 7A is a schematic diagram of a structure of another projection apparatus according to an embodiment of the present invention. Fig. 7B is a top view of another wavelength conversion module of fig. 7A. Referring to fig. 7A, the illumination system 700 and the projection apparatus 800 of the embodiment of fig. 7A are similar to the illumination system 500 and the projection apparatus 600 of fig. 6A, and the differences are as follows. In the embodiment of fig. 6A, the wavelength conversion module 120 and the optical homogenizing unit OU are independent single components, and in this embodiment, as shown in fig. 7A and 7B, the optical homogenizing unit OU can be disposed on the wavelength conversion module 720 and become a part of the wavelength conversion module 720. Specifically, in the present embodiment, the wavelength conversion module 720 has a first annular region OR1 and a second annular region OR2 disposed in different radial ranges, and the two annular regions are, for example, concentric annular regions. For example, in the present embodiment, the inner diameter of the second annular region OR2 is larger than that of the first annular region OR1, but the present invention is not limited thereto, and in other embodiments, the inner diameter of the second annular region OR2 may be smaller than that of the first annular region OR 1.

More specifically, as shown in fig. 7B, the light diffusing element DF OR/and the light polarizing element PM of the optical homogenizing unit OU are disposed on the first annular region OR1, and the at least one wavelength converting region WR and the at least one non-converting region NT of the wavelength converting module 720 are disposed on the second annular region OR 2. Thus, the first laser beam 50B can sequentially pass through at least one non-conversion region NT located in the second annular region OR2 and the optical homogenizing unit OU located in the first annular region OR1 to form the first color light 70B. Second laser beam 50R may pass through optical homogenizing unit OU located in first annular region OR1 to form second colored light 70R. The third laser beam 50G sequentially passes through the optical homogenizing unit OU located in the first annular region OR1 and the at least one non-conversion region NT located in the second annular region OR2 to form a fourth color light 70G 2.

In this way, the illumination system 700 and the projection apparatus 800 can also form the required color light at different time intervals by the arrangement of the first laser light source 110B, the second laser light source 110R, the third laser light source 110G and the wavelength conversion module 720, and can avoid the generation of the picture heterochromatic phenomenon caused by spoke (spoke) state, so as to maintain the brightness of the displayed picture, and further have the similar effects and advantages of the illumination system 500 and the projection apparatus 600, which are not described herein again.

In summary, the embodiments of the present invention have at least one of the following advantages or effects. The embodiment of the present invention provides an illumination system and a projection apparatus, which can form desired color lights at different time intervals by the arrangement of the first laser source, the second laser source and the wavelength conversion module, and can avoid generating the picture color difference phenomenon caused by the spoke (spoke) state, thereby maintaining the brightness of the display picture. In addition, the projection apparatus and the illumination system can omit the configuration of the filter module, so the loss of brightness can be reduced, and the output Ratio of the three primary colors (RGB Color Light output Ratio, CLO Ratio) of 100% can be achieved. In addition, in the embodiment of the present invention, the illumination system and the projection apparatus can also simply switch the on/off states of the first laser source and the second laser source without limitation through the illumination control method, so as to improve the color update rate of the projection apparatus, and thereby eliminate the occurrence of the color break phenomenon, and further achieve a smoother viewing quality.

However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereby, and all the simple equivalent changes and modifications made according to the claims and the contents of the present invention are still included in the scope of the present invention. Moreover, it is not necessary for any embodiment or claim of the invention to address all of the objects, advantages, or features disclosed herein. In addition, the abstract and the utility model name are only used to assist the searching of the patent documents, and are not used to limit the scope of the invention. Furthermore, the terms "first", "second", and the like in the description or the claims are used only for naming elements (elements) or distinguishing different embodiments or ranges, and are not used for limiting the upper limit or the lower limit on the number of elements.

Description of reference numerals:

50B: first laser beam

50R: second laser beam

50G: third laser beam

60Y: wavelength converted light beam

70B: the first color light

70R: second color light

70G, 70G 1: light of the third color

70G 2: light of the fourth color

70: illuminating light beam

80: image light beam

100. 300, 500, 700: lighting system

110B: first laser light source

110G: third laser light source

110R: second laser light source

120. 320A, 320B, 420A, 420B, 420C, 720: wavelength conversion module

121: rotating shaft

122: substrate

130: light splitting and combining module

131. 331, 531: first light splitting element

132. 532: second light splitting element

140: light homogenizing element

200. 400, 600, 800: projection device

210: light valve

220: projection lens

331 a: a first light-splitting region

331 b: a second light-splitting region

333: condensing lens

533: third light splitting element

B1: first boundary

B2: second boundary

BR 1: first blank region

BR 2: second blank region

CW: direction of rotation

DF: light diffusion element

IB 1: first standby area

IB 2: second standby area

LT: light transmission element

NT: non-switching zone

OU: optical homogenizing unit

OR 1: a first annular region

OR 2: second annular region

PM: polarizing element

T1: a first period of time

T2: for a second period of time

T3: for a third period of time

T4: the fourth time period

T5: during the fifth period

WR: a wavelength conversion region.

Claims

1. An illumination system for providing an illumination beam, and comprising a first laser light source, a second laser light source and a wavelength conversion module, wherein:

the first laser light source provides a first laser beam in a first time interval and a third time interval;

the second laser light source provides a second laser beam in a second time period and a fourth time period; and

the wavelength conversion module is located on a transmission path of the first laser beam, wherein the wavelength conversion module has at least one wavelength conversion region and at least one non-conversion region, a first standby region and a second standby region are located between the at least one wavelength conversion region and the at least one non-conversion region, the wavelength conversion module is configured to rotate around a rotating shaft so that the at least one wavelength conversion region, the first standby region, the at least one non-conversion region and the second standby region sequentially rotate along a direction and the at least one wavelength conversion region and the at least one non-conversion region are alternately switched into the transmission path of the first laser beam,

when the wavelength conversion module rotates, in the first period, the first laser beam enters the at least one non-conversion region of the wavelength conversion module to form a first color light, in the second period and the fourth period, the second laser beam forms a second color light, in the third period, the first laser beam enters the wavelength conversion region of the wavelength conversion module to form a third color light, in the second period and the fourth period, the first standby region and the second standby region are respectively and correspondingly cut into a transmission path formed by the first laser beam in the first period or the third period, and no light spot formed by the first laser beam exists on the wavelength conversion module.

2. The illumination system of claim 1, wherein the first laser light source is turned on during the first and third periods of time and turned off during the second and fourth periods of time, and wherein the second laser light source is turned off during the first and third periods of time and turned on during the second and fourth periods of time.

3. The illumination system of claim 1,

the first standby area includes: a first boundary between the at least one wavelength conversion region and the at least one non-conversion region adjacent thereto, wherein during the second period, a portion of the at least one non-conversion region adjacent to the first boundary, and a portion of the at least one wavelength conversion region adjacent to the first boundary are sequentially cut into a transmission path of the first laser beam formed during the first period or the third period; and

the second standby area includes: and a second boundary between the at least one wavelength conversion region and the at least one non-conversion region adjacent thereto, wherein during the fourth period, a portion of the at least one wavelength conversion region adjacent to the second boundary, and a portion of the at least one non-conversion region adjacent to the second boundary are sequentially cut into a transmission path of the first laser beam formed during the first period or the third period.

4. The illumination system of claim 1,

the first standby area comprises a first blank area positioned between one of the at least one wavelength conversion area and at least one non-conversion area adjacent to the at least one wavelength conversion area, and during the second time interval, a part of the at least one non-conversion area adjacent to the first blank area, and a part of the at least one wavelength conversion area adjacent to the first blank area are sequentially cut into a transmission path formed by the first laser beam in the first time interval or the third time interval; and

the second standby area includes a second blank area located between one of the at least one wavelength conversion area and one of the at least one non-conversion area adjacent thereto, and at the fourth time period, a portion of the at least one wavelength conversion area adjacent to the second blank area, and a portion of the at least one non-conversion area adjacent to the second blank area are sequentially cut into a transmission path of the first laser beam formed in the first time period or the third time period.

5. The illumination system of claim 1, wherein the at least one non-conversion region is a light transmissive region.

6. The illumination system of claim 5, further comprising:

a third laser light source for providing a third laser beam during a fifth time period, wherein the first laser light source is turned on during the first time period and the third time period and is turned off during the second time period, the fourth time period and the fifth time period, the second laser light source is turned on during the second time period and the fourth time period and is turned off during the first time period, the third time period and the fifth time period, and the third laser light source is turned on during the fifth time period and is turned off during the first time period, the second time period, the third time period and the fourth time period.

7. The illumination system of claim 6, further comprising:

and the optical homogenizing unit is positioned on the transmission paths of the first laser beam, the second laser beam and the third laser beam, and the wavelength conversion module is configured on the transmission path of the third laser beam.

8. The illumination system of claim 7, wherein the wavelength conversion module has a first annular region and a second annular region configured at different radial extents, the optical homogenizing unit is disposed on the first annular region, the at least one wavelength converting region and the at least one non-converting region of the wavelength converting module are disposed on the second annular region, and the first laser beam sequentially passes through the at least one non-conversion region located in the second annular region and the optical homogenizing unit located in the first annular region to form the first color light, the second laser beam forms the second color light after passing through the optical homogenizing unit positioned in the first annular area, the third laser beam sequentially passes through the optical homogenizing unit positioned in the first annular area and the at least one non-conversion area positioned in the second annular area to form fourth color light.

9. The lighting system of claim 7, wherein the ratio of the time length of the third time period to the time length of the first time period is between 0.5 and 1.5, the ratio of the time length of the second time period or the fourth time period to the time length of the first time period is between 0.5 and 1.5, and the ratio of the time length of the fifth time period to the time length of the first time period is between 1.5 and 3.

10. The illumination system of claim 1, wherein the at least one non-conversion region is a light reflection region.

11. The lighting system of claim 1, wherein the ratio of the time length of the third time period to the time length of the first time period is between 2 and 4, and the ratio of the time length of the second time period or the fourth time period to the time length of the first time period is between 1 and 2.5.

12. A projection apparatus, comprising an illumination system, a light valve, and a projection lens, wherein:

the lighting system is according to claim 1;

the light valve is positioned on the transmission path of the illumination light beam and is used for converting the illumination light beam into an image light beam; and

the projection lens is positioned on the transmission path of the image light beam and is used for projecting the image light beam out of the projection device.