Light source device and projection device

Abstract

The invention provides a light source device and a projection device capable of reducing illumination unevenness when the illumination of light irradiated by the light source device is lower than a specified illumination. The light source device includes: a first light source unit that emits first light from one or more first light-emitting units; a second light source unit that emits second light from the one or more second light-emitting units; a light transmission member through which the incident first light and second light can be transmitted; and a drive unit that individually drives the one or more first light-emitting units and the one or more second light-emitting units, and that irradiates the first light and the second light transmitted through the light-transmitting member, the drive unit individually reducing the amount of the first light and the amount of the second light, or individually extinguishing the one or more first light-emitting units and the one or more second light-emitting units. When the light-transmitting member is viewed from a direction orthogonal to a central axis of the light-transmitting member, the first light is incident on the light-transmitting member at a positive angle with respect to the central axis, and the second light is incident on the light-transmitting member at a negative angle with respect to the central axis.

Description

Technical Field

[0001] The invention relates to a light source device and a projection device. Background Art

[0002] Conventional projection devices, such as projectors, include a light source device having a plurality of light emitting units and capable of irradiating light.

[0003] On the other hand, patent document 1 (Japanese Patent Publication 2006-018327) discloses a technical solution for extending the life of a light source device while reducing power consumption, wherein after a signal regarding the number of light sources that need to be lit among a plurality of light sources is input, the light source to be used is selected and the unselected light sources are extinguished.

[0004] However, in the device of Patent Document 1, when the illuminance of the light irradiated by the light source device is lower than a predetermined illuminance, the illuminance of the light irradiated by the light source device may be uneven depending on the position of the light source selected from the plurality of light sources. Summary of the invention

[0005] In view of the above problems, the present invention provides a technical solution, the object of which is to reduce uneven illumination when the illumination of light irradiated by a light source device is lower than a specified illumination.

[0006] A light source device according to one aspect of the present invention comprises:

[0007] A first light source unit emits a first light from one or more first light emitting units;

[0008] A second light source unit emits a second light from one or more second light emitting units;

[0009] a light-transmitting component for transmitting the incident first light and second light; and

[0010] a driving unit, for individually driving one or more of the first light emitting units and one or more of the second light emitting units,

[0011] The light source device emits the first light and the second light transmitted through the light-transmitting member,

[0012] The driving unit individually reduces the light amount of the first light emitted from each of the one or more first light emitting units and the second light emitted from each of the one or more second light emitting units, or individually turns off one or more first light emitting units and one or more second light emitting units,

[0013] When the light-transmitting member is observed from a direction perpendicular to the central axis of the light-transmitting member, the first light enters the light-transmitting member at a positive angle to the central axis.

[0014] When the light transmissive member is viewed from a direction orthogonal to a central axis of the light transmissive member, the second light enters the light transmissive member at a negative angle with respect to the central axis.

[0015] A light source device according to another aspect of the present invention comprises:

[0016] A first light source unit emits a first light from one or more first light emitting units;

[0017] A second light source unit emits a second light from one or more second light emitting units;

[0018] A light-transmitting component, capable of transmitting the incident first light and second light;

[0019] a driving unit, configured to individually drive one or more of the first light emitting units and one or more of the second light emitting units; and

[0020] A control unit, used to control the action of the driving unit,

[0021] The light source device emits the first light and the second light through the light-transmitting member,

[0022] The driving unit individually reduces the light amount of the first light emitted from each of the one or more first light emitting units and the second light emitted from each of the one or more second light emitting units, or turns off each of the one or more first light emitting units and the one or more second light emitting units.

[0023] When the light-transmitting component is observed from a direction orthogonal to the central axis of the light-transmitting component, the control unit alternately switches, at a predetermined switching cycle, a state in which both the first light and the second light are incident on the light-transmitting component at a positive angle to the central axis of the light-transmitting component and a state in which both the first light and the second light are incident on the light-transmitting component at a negative angle to the central axis.

[0024] The present invention has the effect of reducing uneven illumination when the illumination of light emitted by a light source device is lower than a predetermined illumination. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram showing the structure of the light source device according to the first embodiment of the present invention.

[0026] Figure 2 This is a block diagram showing the hardware configuration of a control unit included in the light source device according to the first embodiment of the present invention.

[0027] Figure 3 This is a functional block diagram of a control unit included in the light source device according to the first embodiment of the present invention.

[0028] Figure 4 This is a schematic diagram of correspondence information used by the control unit of the light source device according to the first embodiment of the present invention.

[0029] Figure 5 This is a process flow chart of the control unit included in the light source device according to the first embodiment of the present invention.

[0030] Figure 6 It is a schematic diagram showing the structure of a light source device according to a second embodiment of the present invention.

[0031] Figure 7 It is a plan view of a wavelength conversion element included in a light source device according to a second embodiment of the present invention.

[0032] Figure 8 It is a plan view of a color wheel included in a light source device according to a second embodiment of the present invention.

[0033] Fig. 9 This is a diagram showing the relationship between the output of excitation light and the output of light emitted from the wavelength conversion element in the light source device according to the second embodiment of the present invention.

[0034] Fig.10 It is a schematic diagram of the excitation light output time in the first mode of the light source device according to the second embodiment of the present invention.

[0035] Fig.11 It is a schematic diagram of the wavelength converted light output time in the first mode of the light source device according to the second embodiment of the present invention.

[0036] Fig.12 It is a schematic diagram of the excitation light output time in the second mode of the light source device according to the second embodiment of the present invention.

[0037] Fig.13 It is a schematic diagram of wavelength-converted light output in the second mode of the light source device according to the second embodiment of the present invention.

[0038] Fig.14 It is a schematic diagram showing the structure of a light source device according to a third embodiment of the present invention.

[0039] Fig.15 This is a first example of an illuminance distribution diagram of light emitted by the light source device according to the third embodiment of the present invention.

[0040] Fig.16 This is a second example of an illuminance distribution diagram of light emitted by the light source device according to the third embodiment of the present invention.

[0041] Fig.17 This is a third example of an illuminance distribution diagram of light emitted by the light source device according to the third embodiment of the present invention.

[0042] Fig.18 This is a fourth example of an illuminance distribution diagram of light emitted by the light source device according to the third embodiment of the present invention.

[0043] Fig.19 This is a fifth example of an illuminance distribution diagram of light emitted from the light source device according to the third embodiment of the present invention.

[0044] Fig. 20 It is a schematic diagram showing the configuration of a light source device according to a modified example of the third embodiment of the present invention.

[0045] Fig.21 It is a schematic diagram showing the structure of a projection device according to a fourth embodiment of the present invention.

[0046] Fig. 22 This is a block diagram showing another example of the control unit included in the light source device according to the embodiment of the present invention.

[0047] Fig.23 This is an example of an operation flow chart of the light source device when the light source group is switched every time the light source device is activated.

[0048] Fig.24 This is a flowchart showing an example of the operation of the light source device when the light source group is switched every specified time, every specified number of days, or every specified accumulated lighting time.

[0049] Fig.25 This is a flowchart showing an example of the operation of the light source device when the light source group is switched after a predetermined time has passed since the start-up.

[0050] Fig.26 This is a flowchart of an example of the operation of the light source device when a predetermined time has passed since the start-up and the light source group is switched when the input signal is switched.

[0051] Fig. 27 This is a flowchart showing an example of an operation of changing a predetermined time for switching in a light source device according to an embodiment of the present invention.

[0052] Fig.28 This is a schematic diagram of an example during the (X+1)th switching.

[0053] Fig.29 It is another schematic diagram of the structure of the projection device involved in the embodiment of the present invention.

[0054] Fig.30 This is a schematic diagram of a first example of an operation mode of the light source device according to the embodiment of the present invention.

[0055] Fig.31 This is a schematic diagram of a second example of the operation mode of the light source device according to the embodiment of the present invention.

[0056] Fig.32 This is a schematic diagram of a third example of the operation mode of the light source device according to the embodiment of the present invention.

[0057] Fig.33 It is a schematic diagram of a modified example of the structure of the light-incident light-transmitting member.

[0058] Fig.34 It is a schematic diagram of the preferred direction SV when testing θ11, θ12, θ21, and θ22.

[0059] Explanation of symbols

[0060] 1. First light source

[0061] 10 First light emitting unit

[0062] 11 First small angle light emitting part

[0063] 12 The first horn luminous part

[0064] 13 First Light Guiding Optics Department

[0065] 131 First lens

[0066] 132 Second lens

[0067] 133 Third lens

[0068] 134 Fourth lens

[0069] 135 Fifth lens

[0070] 14 Third Light Guiding Optics Department

[0071] 141 18th lens

[0072] 142 19th lens

[0073] 143 20th lens

[0074] 144 First Reflector

[0075] 145 21st lens

[0076] 146 22nd lens

[0077] 147 Lens 23

[0078] 2 Second light source

[0079] 20 Second light emitting part

[0080] 21 Second small angle light emitting part

[0081] 22 The second largest angular luminous part

[0082] 23 Second Light Guiding Optics Department

[0083] 231 6th lens

[0084] 232 8th lens

[0085] 234 9th lens

[0086] 235 10th lens

[0087] 24 Fourth Light Guiding Optics Department

[0088] 241 24th lens

[0089] 242 25th lens

[0090] 243 Lens No. 26

[0091] 244 Second Reflector

[0092] 245 Lens No. 27

[0093] 246 28th lens

[0094] 247 Lens No. 29

[0095] 3 Light-transmitting components

[0096] 30 Center axis

[0097] 31 Light incident surface

[0098] 4. Drive unit

[0099] 5. Control Unit

[0100] 51 CPU

[0101] 52 ROM

[0102] 53 RAM

[0103] 54 HDD / SSD

[0104] 55 I / F

[0105] 501 Reception Department

[0106] 502 Luminescence information acquisition unit

[0107] 503 Storage

[0108] 504 Switching condition acquisition unit

[0109] 505 Lighting control unit

[0110] 506 Output

[0111] 507 Image signal detection unit

[0112] 511 Correspondence Information

[0113] 6 Operation section

[0114] 7 Light Guiding Optics

[0115] 71 11th lens

[0116] 72 12th lens

[0117] 73 13th lens

[0118] 74 14th lens

[0119] 75 15th lens

[0120] 76 16th lens

[0121] 77 Lens 17

[0122] 81 Dichroic Mirror

[0123] 82 Reflector

[0124] 83 Prism

[0125] 91 wavelength conversion element

[0126] 911 Wavelength conversion region

[0127] 912 Light reflection area

[0128] 911a Yellow fluorescent area

[0129] 911b Green fluorescent area

[0130] 91a First wavelength conversion element

[0131] 91b Second wavelength conversion element

[0132] 92 Color Wheel

[0133] 921 Red filter area

[0134] 922 Yellow Transmittance Area

[0135] 923 Blue diffusion area

[0136] 924 Green filter area

[0137] 50 Projection Device

[0138] 510 Department of Illumination Optics

[0139] 520 Projection color wheel

[0140] 530 Color Wheel

[0141] 540 Optical Modulation Unit

[0142] 100, 100a, 100b, 100c Light source device

[0143] 111b, 111y, 111r, 111g output

[0144] C1 Luminescence Information

[0145] C2 Switching Condition

[0146] G1 First light source group

[0147] G2 Second light source group

[0148] L Light

[0149] L1 First Light

[0150] L11 First small angle light

[0151] L12 Largest Angle Light

[0152] L2 Second Light

[0153] L21 Second smallest angle light

[0154] L22 The second largest angle of light

[0155] Lb blue reflected light

[0156] Ln wavelength conversion light

[0157] Ls light spot

[0158] Md Working mode information

[0159] P Projected Image

[0160] Pt lighting mode information

[0161] θ11 First small angle

[0162] θ12 The first largest angle

[0163] θ21 second smallest angle

[0164] θ22 The second largest angle DETAILED DESCRIPTION

[0165] The light source device and the projection device according to the embodiment of the present invention will be described in detail below with reference to the accompanying drawings. However, the embodiments shown below are examples of the light source device and the projection device for specifically embodying the technical concept of the embodiment and are not limited thereto.

[0166] The size, material, shape, relative configuration, etc. of the components described in the embodiments of the present invention are merely illustrative and, unless otherwise specifically described, do not mean that the scope of the present invention is limited thereto. For the purpose of clear description, the size, positional relationship, etc. of the components shown in the drawings may sometimes be exaggerated. In the following description, the same name and symbol represent the same or homogeneous components, and detailed description is appropriately omitted.

[0167] Sometimes orthogonal coordinates with an X-axis, a Y-axis, and a Z-axis are used in the accompanying drawings as directions. The X-axis, the Y-axis, and the Z-axis are orthogonal to each other. In the X direction along the X-axis, the arrow indicates a direction marked as +X, and the direction opposite to +X is marked as -X. In the Y direction along the Y-axis, the arrow indicates a direction marked as +Y, and the direction opposite to +Y is marked as -Y. In the Z direction along the Z-axis, the arrow indicates a direction marked as +Z, and the direction opposite to +Z is marked as -Z. However, these specific directions or position terms are only used to help explain the relative directions or positions in the referenced figures. These terms do not limit the orientation of the light source device and the projection device of the embodiments of the present invention when in use, and the orientation of the light source device and the projection device of the embodiments of the present invention when in use is arbitrary.

[0168] In the embodiments of the present invention shown below, the X-axis, Y-axis and Z-axis include the object having a tilt within a range of ±10 degrees relative to these axes. In the embodiments of the present invention, both orthogonal and perpendicular may include an error within ±10 degrees relative to 90 degrees.

[0169] [First embodiment]

[0170] <Overall Configuration of Light Source Device 100>

[0171] Figure 1 It is a schematic diagram showing an example of the structure of the light source device 100 according to the first embodiment of the present invention.

[0172] like Figure 1 As shown, the light source device 100 comprises: a first light source unit 1, which emits a first light L1 from one or more first light emitting units 10; and a second light source unit 2, which emits a second light L2 from one or more second light emitting units 20. The light source device 100 further comprises a light-transmitting component 3, through which the incident first light L1 and second light L2 can pass, and a driving unit 4, which is used to drive the one or more first light emitting units 10 and the one or more second light emitting units 20 individually.

[0173] The light source device 100 emits the first light L1 and the second light L2 that pass through the light-transmitting member 3. For example, the light-transmitting member 3 is a light-homogenizing element that allows the first light L1 and the second light L2 to pass through to synthesize these lights and homogenize the illuminance of the emitted light. The light source device 100 emits the light L whose illuminance is homogenized by passing through the light-transmitting member 3. Figure 1In the example of FIG. 1 , the light source device 100 irradiates the light L in such a manner that the main ray of the light L travels in the +Z direction. Herein, the main ray refers to a ray of light that constitutes a light beam and travels along the central axis of the light beam.

[0174] The driving unit 4 individually reduces the light amount of the first light L1 emitted from each of the one or more first light emitting units 10 and the light amount of the second light L2 emitted from each of the one or more second light emitting units 20, or individually turns off the one or more first light emitting units 10 and the one or more second light emitting units 20. When the light-transmitting member 3 is observed in a direction orthogonal to the central axis 30 of the light-transmitting member 3 (for example, from above the light source device 100 of +Y), the first light L1 enters the light-transmitting member 3 at a positive angle to the central axis 30. When the light-transmitting member 3 is observed in a direction orthogonal to the central axis 30 of the light-transmitting member 3, the second light L2 enters the light-transmitting member 3 at a negative angle to the central axis 30.

[0175] In the “direction perpendicular to the central axis 30 of the light-transmitting member 3”, it is preferable to Fig.34 ( Fig.34 (A) to (D) are from Figure 1 The following relationship is observed when the direction SV shown in the figure (seen in the Z direction) is observed. The direction SV is a direction that symmetrically separates the direction PL1 and the direction PL2. The direction PL1 is a direction that is orthogonal to the central axis 30 of the light-transmitting member 3 and is orthogonal to a line connecting the starting point (L1S) of the first light (principal ray) that directly faces the light-transmitting member 3 and the incident point (L1E) at which the first light enters the light-transmitting member 3. The direction PL2 is a direction that is orthogonal to the central axis 30 of the light-transmitting member 3 and is orthogonal to a line connecting the starting point (L2S) of the second light (principal ray) that directly faces the light-transmitting member 3 and the incident point (L2E) at which the second light enters the light-transmitting member 3. When the direction PL1 is parallel to the direction PL2, the direction SV is also parallel to PL1 and PL2.

[0176] exist Figure 1In the example of , the first light source section 1 has two first light-emitting sections 10 including a first small-angle light-emitting section 11 and a first large-angle light-emitting section 12. The first small-angle light-emitting section 11 and the first large-angle light-emitting section 12 are arranged along the X-axis. The main light ray of the first small-angle light L11 emitted from the first small-angle light-emitting section 11 passes through the light incident surface 31 to form a first small-angle θ11 incident light transmission component 3 with the central axis 30. The main light beam of the first large-angle light L12 emitted from the first large-angle light-emitting section 12 passes through the light incident surface 31 to form a first large-angle θ12 incident light transmission component 3 with the central axis 30. The first small angle θ11 and the first large angle θ12 are both positive angles. On the other hand, the second light source section 2 has two second light-emitting sections 20 including a second small-angle light-emitting section 21 and a second large-angle light-emitting section 22. The second small-angle light-emitting section 21 and the second large-angle light-emitting section 22 are arranged along the X-axis. The principal ray of the second small-angle light L21 emitted from the second small-angle light emitting portion 21 passes through the light incident surface 31 to enter the light transmission component 3 at a second small angle θ21 with the central axis 30. The principal ray of the second large-angle light L22 emitted from the second large-angle light emitting portion 22 passes through the light incident surface 31 to enter the light transmission component 3 at a second large angle θ22 with the central axis 30. Both the second small angle θ21 and the second large angle θ22 are negative angles. In the light source device 100, the second light L2 including the second small-angle light L21 and the second large-angle light L22 enters the light transmission component 3 at a negative angle θ21 or a negative angle θ22 with the central axis 30.

[0177] Although Figure 1 The principal ray is used to illustrate the light emitted by the first small-angle light-emitting section 11 and the first large-angle light-emitting section 12, the second small-angle light-emitting section 21 and the second large-angle light-emitting section 22, but in fact the light emitted by each light-emitting section is a beam with a finite width. In this description, since light other than the principal ray not depicted, such as peripheral light, has divergence, in some cases, its peripheral light may also cross the central axis 30 of the light-transmitting component 3. In the present invention, since the incident angle of the principal ray of the light-transmitting section 3 has a great influence on the illuminance non-uniformity, the principal ray or the light with the strongest light intensity is discussed, but there is no restriction on peripheral light other than the light intensity angle emitted from each light-emitting section and weaker than the center.

[0178] In the light source device 100, the light amount of one or more first lights L1 and the light amount of one or more second lights L2 can be individually reduced, or one or more first light-emitting units 10 and one or more second light-emitting units 20 can be individually extinguished by the driving unit 4. In this way, compared with the case where the light amount emitted by each of the first light-emitting units 10 is not reduced but the first light L1 is always emitted, and the light amount emitted by each of the second light-emitting units 20 is not reduced but the second light L2 is always emitted, the light emission time or light amount of each of the first light-emitting units 10 and the second light-emitting units 20 can be shortened. In the case where the first light L1 is always emitted without reducing the light amount of each of the first light-emitting units 10, and the second light L2 is always emitted without reducing the light amount of each of the second light-emitting units 20, the average illuminance of the light L irradiated by the light source device 100 corresponds to the specified illuminance.

[0179] By shortening the light emission time or reducing the light emission amount, the illuminance of the light emitted by the light source device 100 can be lowered to a lower than a predetermined illuminance, thereby extending the life of each of the first light emitting unit 10 and the second light emitting unit 20. Thus, the life of the light source device 100 is extended.

[0180] On the other hand, if the light amount of one or more first lights L1 and the light amount of one or more second lights L2 are individually reduced, or if one or more first light emitting units 10 and one or more second light emitting units 20 are individually turned off, the anisotropy of the angles formed by the first lights L1 and the one or more second lights L2 entering the light-transmitting member 3 and the central axis 30 may be increased in some cases. For example, the first lights L1 and the one or more second lights L2 enter the light-transmitting member 3 at positive angles relative to the central axis 30, etc., which conform to the anisotropy of the angles formed with the central axis 30. Due to this anisotropy, the irradiated light L may have uneven illumination. In the light source device 100, the first lights L1 enter the light-transmitting member 3 at positive angles relative to the central axis 30, and the second lights L2 enter the light-transmitting member 3 at negative angles relative to the central axis 30. In this way, the light source device 100 can reduce the anisotropy of the incident angles formed by the first lights L1 and the second lights L2 and the central axis 30, thereby reducing the uneven illumination of the light L.

[0181] As described above, the present embodiment can reduce uneven illumination when the illumination of the light emitted by the light source device 100 is lower than a specified illumination. Here, the angle of the first light L1 relative to the central axis 30 is, for example, the angle formed by the principal ray in the first light L1 and the central axis 30. The angle of the second light L2 relative to the central axis 30 is, for example, the angle formed by the principal ray in the second light L2 and the central axis 30. As long as at least the principal ray in the first light L1 enters the light-transmitting component 3 at a positive angle to the central axis 30, and at least the principal ray in the second light L2 enters the light-transmitting component 3 at a negative angle to the central axis 30, rather than at a positive angle, the effect of reducing uneven illumination of the light L can be obtained. Figure 1 In the example, the first light L1 forms a positive angle with the central axis 30, and the second light L2 forms a negative angle with the central axis 30, but the first light L1 may form a negative angle with the central axis 30, and the second light L2 may form a positive angle with the central axis 30. The direction perpendicular to the central axis 30 of the light-transmitting component 3 is not limited to Figure 1 The +Y direction shown may be any direction orthogonal to the central axis 30 .

[0182] exist Figure 1 In the example of FIG. 1 , the light source device 100 includes a control unit 5 for controlling the operation of the driving unit 4. The control unit 5 has the following features: Figure 3 The light control unit 5 is used to control whether to reduce the light amount of the first light L1 emitted by the one or more first light emitting units 10 and the light amount of the second light L2 emitted by the one or more second light emitting units 20, or to turn off the one or more first light emitting units 10 and the one or more second light emitting units 20. In addition, the control unit 5 can also control the second light L2 to enter the light-transmitting member 3 at a negative angle to the central axis 30 when the light-transmitting member 3 is viewed from a direction orthogonal to the central axis 30 of the light-transmitting member 3. By having such a control unit 5, the light source device 100 can reduce low-illuminance unevenness when the illuminance of the light L irradiated by the light source device 100 is less than a specified illuminance.

[0183] The light source device 100 can alternately light up the first light source unit 1 and the second light source unit 2. By alternately lighting up the first light source unit 1 and the second light source unit 2, the life of the light source device 100 can be extended. Although one of the first light source unit 1 and the second light source unit 2 is not lit for only a moment, it is preferred to alternately light up the first light source unit 1 and the second light source unit 2 within a time range that can be recognized by humans as being almost simultaneous.

[0184] It is preferable that the interval (switching cycle) at which the first light source unit 1 and the second light source unit 2 are alternately lit is, for example, a time corresponding to one frame of 24 to 50 fps (frames per second) used for image generation.

[0185] In the light source device 100, even if there is an inherent uneven illumination of the first light source unit 1 and the second light source unit 2, as long as the inherent uneven illumination of each is small enough, even if it is not an instantaneous switching cycle, the switching of each startup or a long period of time every day can be performed in an unnoticeable manner. Generally speaking, the uneven illumination can be visually detected when the deviation is 50%, and if the deviation is reduced to about 30%, it will not be obvious without comparison. Moreover, if the uneven illumination of each of the first light source unit 1 and the second light source unit 2 can be suppressed to less than 10%, even if the first light source unit 1 and the second light source unit 2 are driven individually, there will be no discomfort related to the uneven illumination. In other words, as long as the difference in the uneven illumination of the first light source unit 1 and the second light source unit 2 is small, there is no need to consider the image of the switching cycle when setting the switching cycle.

[0186] The light source device 100 is not limited to lighting the first light source unit 1 and the second light source unit 2 alternately, but may light the first light source unit 1 and the second light source unit 2 simultaneously. The light source device 100 may reduce uneven illumination of the light L emitted by the light source device 100 by lighting the first light source unit 1 and the second light source unit 2 simultaneously.

[0187] In the light source device 100, when the light-transmitting member 3 is viewed from a direction orthogonal to the central axis 30, the absolute value of the angle formed by the principal ray of the first small-angle light L11 and the central axis 30 is smaller than the absolute value of the angle formed by the principal ray of the first large-angle light L12 and the central axis 30. Moreover, when the light-transmitting member 3 is viewed from a direction orthogonal to the central axis 30, the absolute value of the angle formed by the principal ray of the second small-angle light L21 and the central axis 30 is smaller than the absolute value of the angle formed by the principal ray of the second large-angle light L22 and the central axis 30. In this way, since the angle difference between the first light L1 and the second light L2 can be reduced, the uneven illumination of the light L irradiated by the light source device 100 can be reduced.

[0188] In the light source device 100, when the light-transmitting member 3 is viewed from a direction perpendicular to the central axis 30, the absolute value of the angle of the principal ray of the first small-angle light L11 relative to the central axis 30 is equal to the absolute value of the angle of the principal ray of the second small-angle light L21 relative to the central axis 30. Moreover, when the light-transmitting member 3 is viewed from a direction perpendicular to the central axis 30, the absolute degree of the angle of the principal ray of the first large-angle light L21 relative to the central axis 30 is equal to the absolute degree of the angle of the principal ray of the second large-angle light L22 relative to the central axis 30. In this way, since the light amounts of the first light L1 and the second light L2 are substantially equal, the uneven illumination of the light L irradiated by the light source device 100 can be reduced.

[0189] In the light source device 100, the first small-angle light-emitting portion 11 and the second small-angle light-emitting portion 21 constitute the first light source group G1. The first large-angle light-emitting portion 12 and the second large-angle light-emitting portion 22 constitute the second light source group G2. The driving unit 4 alternately turns off the first light source group G1 and the second light source group G2, or alternately reduces the light amount of the first light L1 from the first light source group G1 and the light amount of the second light L2 from the second light source group G2. In this way, not only the light amounts of the first light L1 and the second light L2 are made approximately equal, but also the light amounts are reduced, so that when the illuminance of the light L irradiated by the light source device 100 is lower than the specified illuminance, the uneven illuminance can be reduced.

[0190] In the light source device 100, the driving unit 4 alternately turns off the first light source group G1 and the second light source group G2 in a predetermined switching cycle, or alternately reduces the light amount of the first light L1 from the first light source group G1 and the light amount of the second light L2 from the second light source group G2. In this way, not only the light amount of the first light L1 and the second light L2 are approximately equal in various preset cycles, but also the light amount is reduced. For example, by shortening the switching cycle to a level that cannot be perceived by the human eye, the switching of the first light source group G1 and the second light source group G2 can be performed inconspicuously. Or, every time the light source device 100 is started, by switching the first light source group G1 and the second light source group G2, the switching of the first light source group G1 and the second light source group G2 can be performed inconspicuously. As a result, not only can the life of the light source device 100 be extended, but also the uneven illumination of the light L irradiated by the light source device 100 can be reduced and made less noticeable.

[0191] The first light emitting unit 10 and the second light emitting unit 20 in the light source device 100 each include at least one of a light emitting diode element (LED: Light Emitting Diode) and a semiconductor laser element (LD: Laser Diode). With this configuration, the light source device 100 can perform high-speed control such as turning on, off, or changing the light amount of the first light emitting unit 10 and the second light emitting unit 20. In addition, the first light emitting unit 10 and the second light emitting unit 20 both include semiconductor laser elements, which can increase the light amount of the light L irradiated by the light source device 100.

[0192] exist Figure 1In the example of , the first light source unit 1 has a first light guide optical system 13 for guiding the first light L1 emitted from one or more first light emitting units 10 to the light transmitting component 3. The first light guide optical system 13 has a first lens 131, a second lens 132, a third lens 133, a fourth lens 134, and a fifth lens 135. The second light source unit 2 has a second light guide optical system 23 for guiding the second light L2 emitted from one or more second light emitting units 20 to the light transmitting component 3. The second light guide optical system 23 has a sixth lens 231, a seventh lens 232, an eighth lens 233, a ninth lens 234, and a tenth lens 235. The lenses included in each of the first light guide optical system 13 and the second light guide optical system 23 are composed of glass or resin having light transmittance. The light transmittance herein preferably has a transmittance of 60% or more with respect to the first light L1 and the second light L2. The type, shape, configuration, number, etc. of the lenses included in the first light-guiding optical system 13 and the second light-guiding optical system 23 can be changed appropriately. In addition to lenses, the first light-guiding optical system 13 and the second light-guiding optical system 23 can also include various optical elements such as reflectors, diffraction elements, MEMS (MicroElectro Mechanical Systems), and optical fibers. The number and configuration of the optical elements included in the first light-guiding optical system 13 and the second light-guiding optical system 23 can also be changed appropriately.

[0193] The light-transmitting component 3 may use a light-homogenizing element such as a rod-shaped integrator. The light-transmitting component 3 may be made of a light-transmitting resin or glass. The light-transmitting component 3 is not limited to a light-homogenizing element as long as it can transmit the first light L1 and the second light L2. Even if the light-transmitting component 3 is not a light-homogenizing element, the light source device 100 can reduce the uneven illumination when the illumination of the light L irradiated by the light source device 100 is lower than the prescribed illumination, compared with the case where the embodiment of the present invention is not adopted. The light-transmitting component 3 is not necessarily limited to a component that allows light to pass through a transmissive medium (a light-transmitting resin or glass). For example, the light-transmitting component 3 may be constructed as a so-called light tunnel in a hollow shape composed of four plane mirrors, with the incident opening shape and the emission opening shape being rectangular, and the light-homogenizing effect is obtained by repeated reflection or total reflection on the mirror surface of the plane mirror.

[0194] The driving unit 4 is composed of a circuit and the like. The operating unit 6 can receive an operation of the light source device 100 by an operator. The operating unit 6 includes, for example, a touch panel, a button, a keyboard, etc. The operating unit 6 can also be integrated with the display unit. The light source device 100 has a housing that accommodates the first light source unit 1, the second light source unit 2, and the light-transmitting component 3. The driving unit 4 and the control unit 5 are accommodated in the housing.

[0195] <Configuration Example of Control Unit 5>

[0196] Hardware composition

[0197] Figure 2 1 is a block diagram of an example of the hardware structure of the control unit 5. The control unit 5 includes a CPU (Central Processing Unit) 51, a ROM (Read Only Memory) 52, a RAM (Random Access Memory) 53, a HDD (Hard Disk Drive) / SSD (Solid State Drive) 54, and an I / F (Interface) 55. These components are connected to each other through a system bus B so as to be able to communicate with each other.

[0198] The CPU 51 performs control processing including various arithmetic processing. The ROM 52 is a nonvolatile memory that stores programs such as IPL (Initial Program Loader) for driving the CPU 51. The RAM 53 is a volatile memory used as a work area of ​​the CPU 51. The HDD / SSD 54 is a nonvolatile memory that stores various information and programs used in the control of the control unit 5.

[0199] I / F55 is an interface for communication between the control unit 5 and devices or apparatuses other than the control unit 5. I / F55 can also communicate with devices or apparatuses other than the control unit 5 through a network or the like. Devices other than the control unit 5 are the drive unit 4, the operation unit 6, etc. Devices other than the control unit 5 are external PCs (Personal Computers) or external servers, etc.

[0200] Functional composition

[0201] See also Figure 3 and Figure 4 , describing the functional structure of the control unit 5. Figure 3 This is an example functional block diagram of the control unit 5. Figure 4 This is a schematic diagram of an example of the correspondence information 511 used by the control unit 5.

[0202] like Figure 3 As shown, the control unit 5 includes a receiving unit 501 , a light emission information acquisition unit 502 , a storage unit 503 , a switching condition acquisition unit 504 , a light emission control unit 505 , and an output unit 506 .

[0203] The functions of the receiving unit 501 and the output unit 506 are implemented by the I / F 55 and the like. Part of the functions of the receiving unit 501 and the output unit 506 can also be implemented by the CPU 51 and other processors executing the processing specified by the program stored in the ROM 52 and the like. The function of the storage unit 503 is implemented by the RAM 53, the HDD / SSD 54 and the like. The functions of the light emitting information acquisition unit 502, the switching condition acquisition unit 504 and the light emitting control unit 505 are implemented by the CPU 51 and other processors executing the processing specified by the program stored in the ROM 52 and the like.

[0204] The functions of the control unit 5 can also be implemented by one or more processing circuits. The "processing circuit" here includes devices such as ASIC (Application Specific Integrated Circuit), DSP (Digital Signal Processor) and existing circuit modules designed to perform the functions described above. Some of the functions of the control unit 5 can also be implemented by external devices such as an external PC or an external server that is communicatively connected to the control unit 5. Furthermore, some of the functions of the control unit 5 can also be implemented by distributed processing of the control unit 5 and these external devices.

[0205] The receiving unit 501 controls communication with the operating unit 6 to receive the operation mode information Md, lighting mode information Pt, and switching conditions of the first light emitting unit 10 and the second light emitting unit 20 of the light source device 100 selected by the operator using the operating unit 6 .

[0206] The light emission information acquisition unit 502 refers to the corresponding information 511 stored in the storage unit 503 based on the operation mode information Md and the lighting pattern information Pt obtained from the reception unit 501 , and acquires the light emission information C1 .

[0207] The switching condition acquisition unit 504 acquires the switching condition C2 through the reception unit 501 and provides the switching condition C2 to the light emission control unit 505 .

[0208] The light control unit 505 controls the driving unit 4 to drive one or more first light emitting units 10 and one or more second light emitting units 20. The light control unit 505 controls the driving unit 4 to drive one or more first light emitting units 10 and one or more second light emitting units 20 to emit light according to the light information C1 and the switching condition C2.

[0209] The output section 506 controls the communication between the control section 5 and the driving section 4 according to the instruction issued by the light emission control section 505 .

[0210] like Figure 4As shown, the corresponding information 511 is information that predetermines the correspondence between the action mode information Md, the lighting mode information Pt, and the luminous information C1. The action modes include full lamp mode, 2 times life mode, 4 times life mode, and 8 times life mode. The items of each working mode include: lighting mode, light intensity ratio to full lamp, the output of each of the first small-angle light-emitting unit 11 and the first large-angle light-emitting unit 12 in the first light-emitting unit 10, the output of each of the second small-angle light-emitting unit 21 and the second large-angle light-emitting unit 22 in the second light-emitting unit 20, and the illumination uniformity of the light L. The light intensity ratio to full lamp is expressed in percentage. The output is expressed in ratio. The blank in the output column of the first small-angle light-emitting unit 11, the first large-angle light-emitting unit 12, the second small-angle light-emitting unit 21, and the second large-angle light-emitting unit 22 in Table 4 means that the light-emitting unit is off or the light intensity is reduced. Figure 4 The illumination uniformity in the illuminance uniformity is an evaluation result of uniformity in each operation mode, and is not information used in controlling the first light emitting unit 10 and the second light emitting unit 20. Uniformity includes the best "best", which is worse than "best", and "slightly worse", which is worse than "better".

[0211] The full light mode is an operation mode in which at least one first light emitting unit 10 and at least one second light emitting unit 20 are all lit. The lighting mode in the full light mode is the full light mode, and the light quantity ratio to the full light mode is 100%. The outputs of the first small-angle light emitting unit 11, the first large-angle light emitting unit 12, the second small-angle light emitting unit 21, and the second large-angle light emitting unit 22 are 1.00, respectively, and the illumination uniformity is "optimal".

[0212] The 2x life mode is an operation mode in which the life of the light source device 100 is approximately twice that of the full lamp mode by individually reducing the light amount of one or more first lights L1 and the light amount of one or more second lights L2 or individually extinguishing one or more first light-emitting units 10 and one or more second light-emitting units 20. The lighting modes of the 2x life mode include the first mode to the fifth mode, each of which includes mode A and mode B. Each mode is a combination of the first small-angle light-emitting unit 11, the first large-angle light-emitting unit 12, the second small-angle light-emitting unit 21, and the second large-angle light-emitting unit 22, which have a light amount ratio of 50% to the full lamp mode. In the first mode and the second mode, since the sum of the light amounts of the first small-angle light-emitting unit 11 and the first large-angle light-emitting unit 12 is approximately equal to the sum of the light amounts of the second small-angle light-emitting unit 21 and the second large-angle light-emitting unit 22, the uniformity of illumination is "optimal". In the third and fourth modes, the uniformity of brightness is "better" because the sum of the light amounts of the first small-angle light-emitting section 11 and the first large-angle light-emitting section 12 is not uniform with the sum of the light amounts of the second small-angle light-emitting section 21 and the second large-angle light-emitting section 22. In the fifth mode, the uniformity is "slightly worse" because one of the first small-angle light-emitting section 11 and the first large-angle light-emitting section 12 or the second small-angle light-emitting section 21 and the second large-angle light-emitting section 22 is lit and the other is off.

[0213] The 4x life mode is an operation mode in which the life of the light source device 100 is approximately 4 times that of the full lamp mode by individually reducing the light amount of one or more first lights L1 and the light amount of one or more second lights L2, or individually extinguishing one or more first light-emitting units 10 and one or more second light-emitting units 20. The lighting mode of the 4x life mode includes the sixth mode. The sixth mode includes mode A and mode B. Mode A and mode B of the sixth mode are a combination of the first small-angle light-emitting unit 11, the first large-angle light-emitting unit 12, the second small-angle light-emitting unit 21, and the second large-angle light-emitting unit 22, which are 25% of the light amount ratio of the full lamp. In the sixth mode, since the sum of the light amounts of the first small-angle light-emitting unit 11 and the first large-angle light-emitting unit 12 is substantially equal to the sum of the light amounts of the second small-angle light-emitting unit 21 and the second large-angle light-emitting unit 22, the uniformity of illumination is "optimal".

[0214] The 8-times life mode is an operation mode that makes the life of the light source device 100 about 8 times that of the full lamp mode by individually reducing the light amount of one or more first lights L1 and the light amount of one or more second lights L2, or individually extinguishing one or more first light-emitting units 10 and one or more second light-emitting units 20. The lighting mode of the 8-times life mode has a seventh mode. The seventh mode includes mode A and mode B. Mode A and mode B of the seventh mode are a combination of the first small-angle light-emitting unit 11, the first large-angle light-emitting unit 12, the second small-angle light-emitting unit 21, and the second large-angle light-emitting unit 22, which have a light amount ratio of 12.5% ​​to the full lamp. In the seventh mode, since the sum of the light amounts of the first small-angle light-emitting unit 11 and the first large-angle light-emitting unit 12 is substantially equal to the sum of the light amounts of the second small-angle light-emitting unit 21 and the second large-angle light-emitting unit 22, the uniformity of illumination is "optimal".

[0215] Figure 4 The first mode is Figure 1 When the light-transmitting member 3 is viewed from a direction perpendicular to the central axis 30, the absolute value of the angle formed by the principal ray of the first light L1 emitted from the first small-angle light-emitting section 11 and incident on the light-transmitting member 3 and the central axis 30 is equal to the absolute value of the angle formed by the principal ray of the second light L2 emitted from the second small-angle light-emitting section 21 and incident on the light-transmitting member 3 and the central axis 30. Also, when the light-transmitting member 3 is viewed from a direction perpendicular to the central axis 30, the absolute value of the angle formed by the principal ray of the first large angle L1 emitted from the first light-emitting section 12 and transmitted through the light-transmitting member 3 and the central axis 30 is equal to the absolute value of the angle formed by the principal ray of the second large angle L2 emitted from the second light-emitting section 22 and incident on the light-transmitting member 3 and the central axis 30.

[0216] Figure 4 In the first to fourth modes, the sixth mode, and the seventh mode, the mode A corresponding to the first light source group G1 and the mode B corresponding to the second light source group G2 can be performed alternately. Figure 1 The first light source group G1 and the second light source group G2 can be alternately turned off, or the light amount of the first light L1 emitted by the first light source group G1 and the light amount of the second light L2 emitted by the second light source group G2 can be alternately reduced.

[0217] exist Figure 4 In the fifth mode, from Figure 1 When the light-transmitting member 3 is viewed from a direction perpendicular to the central axis 30, the state in which both the first light L1 and the second light L2 enter the light-transmitting member 3 at a positive angle to the central axis 30 and the state in which both the first light L1 and the second light L2 enter the light-transmitting member 3 at a negative angle to the central axis 30 can be alternately switched at a predetermined switching cycle. For example, by shortening the switching cycle to a level that cannot be perceived by the human eye, the above switching can be performed inconspicuously. In this way, by reducing the illuminance to less than the predetermined illuminance, the life of the light source device 100 can be extended, and at the same time, the unevenness of the illuminance of the light L irradiated by the light source device 100 can be reduced to a level that is not noticeable.

[0218] Whenever the light source device 100 is started, the light source device 100 alternately switches between the first light source group G1 and the second light source group G2. In addition, the above switching can also be performed after each specified number of starts of the light source device 100, and further, the above switching can be performed after each specified time, specified number of days, specified cumulative lighting time, etc. These switching conditions are selected by the operator using the operating unit 6, for example. The control unit 5 obtains the selection result of the switching condition through the receiving unit 501 and sets it.

[0219] A part of the control unit 5 in the light source device 100 or a separate storage device is provided, and the switching cycle information is recorded in the storage device in advance. The switching cycle information can also be read at each startup, and the startup can be based on the information. It is also possible to record the lighting time and lighting driving conditions (current, temperature, etc.) of each light-emitting unit, and determine the switching cycle by deriving the cumulative lighting from the information. The information on the lighting time and lighting driving conditions (current, temperature, etc.) of each light-emitting unit is set to be remotely readable, and the switching cycle information can be rewritten from the outside. The program of the switching information calculation method can be updated. In addition, if the driving information of the light source is read out, and the light source is judged to be abnormal from the driving information according to a prescribed judgment criterion, lighting control can also be performed to drive the light source in a manner that minimizes uneven illumination or changes in chromaticity coordinates.

[0220] <Processing Example of Control Unit 5>

[0221] Figure 5 This is an example of a processing flow chart of the control unit 5. Figure 5 The display shows the process of the control unit 5 which receives a selection operation of an operation mode different from the certain operation mode and changes the operation mode according to the selection operation when the light source device 100 is operating in a certain operation mode.

[0222] First, in step S11 , the control unit 5 determines via the receiving unit 501 whether the operation mode information Md, lighting mode information Pt, and switching condition C2 of the light source device 100 selected by the operator via the operating unit 6 are accepted.

[0223] In step S11, if it is determined that the application has not been accepted (No in step S11), the control unit 5 performs the process of step S11 again. On the contrary, if it is determined that the application has been accepted (Yes in step S11), the control unit 5 performs the process of step S12.

[0224] In step S12 , the control unit 5 acquires the emission information C1 by the emission information acquisition unit 502 based on the operation mode information Md and lighting pattern information Pt obtained from the reception unit 501 by referring to the corresponding information 511 stored in the storage unit 503 . The emission information acquisition unit 502 provides the emission information C1 to the control unit 5 .

[0225] Next, in step S13 , the control unit 5 supplies the switching condition C2 acquired by the receiving unit 501 to the light emission control unit 505 via the switching condition acquiring unit 504 .

[0226] In step S14 , the control unit 5 controls the driving unit 4 through the light emission control unit 505 to drive the one or more first light emitting units 10 and the one or more second light emitting units 20 to emit light, based on the light emission information C1 and the switching condition C2 .

[0227] As described above, the control unit 5 can receive a selection operation of an operation mode different from the certain operation mode while operating in a certain operation mode, and execute a process of changing the operation mode according to the selection operation.

[0228] [Second embodiment]

[0229] Next, the light source device involved in the second embodiment is described. The names and symbols that are the same as those in the embodiments of the present invention that have been described are appropriately omitted below to indicate the detailed description of the same or homogeneous components or structures. The same omissions are also made in the description of the embodiments or variations of the present invention in the future.

[0230] refer to Figure 6 to Figure 8 , describing the structure of a light source device according to a second embodiment of the present invention. Figure 6 It is a schematic diagram showing an example of the structure of a light source device 100 a according to the second embodiment of the present invention. Figure 7 It is a plan view of the wavelength conversion element 91 included in the light source device 100a. Figure 8 It is a plan view of the color wheel 92 included in the light source device 100 a .

[0231] The light source device 100a has a rotatable wavelength conversion element 91 including a wavelength conversion region 911 and a light reflection region 912. The first light emitting section 10 in the light source device 100a emits a blue first light L1, and the second light emitting section 20 emits a blue second light L2. The wavelength conversion element 91 receives the first light L1 and the second light L2 in the wavelength conversion region 911 and emits a wavelength converted light Ln, and receives the first light L1 and the second light L2 in the light reflection region 912 and emits a blue reflected light Lb. The wavelength converted light Ln and the blue reflected light Lb emitted by the wavelength conversion element 91 pass through the incident light transmission member 3 such as the color wheel 92, respectively. The light source device 100a can alternately irradiate the wavelength converted light Ln and the blue reflected light Lb from the light transmission member 3 by rotating the wavelength conversion element 91. The above is the main difference from the first embodiment described above. The light transmission member 3 of the light source device 100a alternately irradiates the wavelength converted light Ln and the blue reflected light Lb in the +Z direction.

[0232] The configuration of the light source device 100a that alternately irradiates the wavelength-converted light Ln and the blue reflected light Lb can reduce uneven illumination when the illumination of the light L irradiated by the light source device 100 is lower than a predetermined illumination.

[0233] exist Figure 6 In the example, the first light emitting unit 10 and the second light emitting unit 20 are units each composed of 2×7 or 4×7 light emitting units arranged in two dimensions. The first light L1 from the first light emitting unit 10 and the second light L2 from the second light emitting unit 20 each have a blue wavelength band of 405 nm to 430 nm.

[0234] exist Figure 6In the example of , the light source device 100a includes a light guide optical system 7, a dichroic mirror 81, and a color wheel 92. The light guide optical system 7 guides the blue first light L1 from the first light emitting unit 10 and the blue second light L2 from the second light emitting unit 20 to the light transmitting component 3. The light guide optical system 7 includes a 12th lens 71, a 12th lens 72, a 13th lens 73, a 14th lens 74, a 15th lens 75, a 16th lens 76, and a 17th lens 77. The 11th lens 71 and the 14th lens 74 are lens arrays, respectively. The 15th lens 75 and the 16th lens 76 converge the first light L1 and the second light L2 onto the surface on the +Z side of the wavelength conversion element 91. The 17th lens 77 converges the wavelength converted light Ln and the blue reflected light Lb onto the light incident surface 31 of the light transmitting component 3. The optical elements included in the light guide optical system 7 can be composed of glass or resin having light transmittance. The type, shape, arrangement, number, etc. of the optical elements included in the light guide optical system 7 can be changed appropriately. The dichroic mirror 81 reflects the blue first light L1 and the blue second light L2 in the direction of the wavelength conversion element 91, and transmits the wavelength conversion light Ln and the blue reflected light Lb emitted by the wavelength conversion element 91. The color wheel 92 transmits the wavelength conversion light Ln and the blue reflected light Lb from the wavelength conversion element 91.

[0235] exist Figure 7 In the example shown, the wavelength conversion element 91 is a roughly circular plate-shaped component when viewed from the +Z side. However, the shape of the wavelength conversion element 91 viewed from the +Z side may also be roughly rectangular, elliptical, polygonal, etc. A wavelength conversion region 911 constituting a partial circular ring and a fan-shaped light reflection region 912 are provided on the surface on the +Z side of the wavelength conversion element 91. The wavelength conversion region 911 includes a yellow fluorescent region 911a emitting yellow fluorescent light and a green fluorescent region 911b emitting green fluorescent light or yellow-green fluorescent light. The light reflection region 912 directly reflects the incident blue first light L1 and the blue second light L2. However, the light reflection region 912 may also diffusely reflect the incident blue first light L1 and the blue second light L2. Figure 7 The light point Ls in the figure represents the light point of the first light L1 or the second light L2 that enters the incident light reflection area 912. By driving the wavelength conversion element 91 to rotate around the central axis of the plate-shaped member, the position of each area can be continuously changed. The structure of the wavelength conversion element 91 is not limited to Figure 7 The structure shown can be modified appropriately. For example, the wavelength conversion region 911 can be set to be fan-shaped, and the light reflection region 912 can be set to be ring-shaped.

[0236] exist Figure 8In the example, the color wheel 92 is a roughly circular plate-shaped component when viewed from the +Z side. However, the shape of the color wheel 92 viewed from the +Z side may also be roughly rectangular, elliptical, polygonal, etc. On the surface on the +Z side of the color wheel 92, there are provided a fan-shaped red filter area 921, a fan-shaped yellow transmission area 922, a fan-shaped blue diffusion area 923, and a fan-shaped green filter area 924. The red filter area 921 transmits red light and absorbs other light. The yellow transmission area 922 transmits red light. The blue diffusion area 923 diffuses the incident blue reflected light Lb. The green filter area 924 transmits green light and absorbs other light. The green filter area 924 may be a green transmission area through which green light passes. By driving the color wheel 92 to rotate around the central axis of the plate-shaped component, the positions of each area can be continuously changed. The color wheel 92 is not limited to Figure 8 The structure shown can be changed appropriately. For example, the red filter area 921, the yellow transmission area 922, the blue diffusion area 923 and the green filter area 924 can be arranged in a circular shape, or areas of other colors can be added.

[0237] <Characteristics of the Wavelength Conversion Region 911>

[0238] Next, the characteristics of the wavelength conversion region 911 will be described. Fig. 9 FIG. 1 is a schematic diagram showing the relationship between the excitation light output and the wavelength-converted light Ln output in the light source device 100 a . Fig. 9 The horizontal axis represents the excitation light output. The excitation light corresponds to at least one of the first light L1 emitted from the first light emitting portion 10 and incident on the wavelength conversion region 911 and the second light L2 emitted from the second light emitting portion L2 and incident on the wavelength conversion region 911. Fig. 9 The vertical axis represents the output of the wavelength converted light Ln.

[0239] Here, for example, in a light source device using a wavelength conversion element, when the excitation light output increases, the conversion efficiency of the wavelength conversion element decreases due to the increase in temperature of the wavelength conversion element into which the excitation light is incident, and the output of the wavelength converted light emitted from the wavelength conversion element decreases. In other words, even if the excitation light output is halved, the output of the wavelength converted light does not become halved, and sometimes becomes less than half of the output of the excitation light. As a result, the chromaticity coordinates or color temperature of the light emitted from the light source device deviates from the required chromaticity coordinates or color temperature.

[0240] The first light L1 and the second light L2 as the excitation light in the light source device 100a are lights of the first wavelength band. The wavelength conversion element 91 emits light of the second wavelength band different from the first wavelength band by receiving the first light L1 and the second light L2. When the period during which the light source device 100a irradiates the light of the first wavelength band without passing through the wavelength conversion element 91 is t1, and the period during which the light source device 100a irradiates the light of the second wavelength band from the wavelength conversion element 91 is t2, the period t1 and the period t2 are independently set in consideration of the color balance. The light source device 100a has a first mode and a second mode. In the first mode, the light of the first wavelength band irradiated during the period t1 and the light of the second wavelength band irradiated during the period t2 are irradiated to at least a portion of the wavelength band, respectively, or the first output light is irradiated by combining at least a portion of the period t1 and the period t2. In the second mode, the second output light different from the first output light is irradiated. In the first mode, the output of the first light source unit required to obtain the light of the first wavelength band is set to M1_PLD1, and in the first mode, the output of the first light emitting unit 10 or the second light emitting unit 20 required to obtain the light of the second wavelength band is set to M1_PLD2. The ratio of output M1_PLD1 and output M1_PLD2 is η1, and in the second mode, the output of the first light emitting unit 10 or the second light emitting unit 20 required to obtain the light of the first wavelength band is set to M2_PLD1, and in the second mode, the output of the first light emitting unit 10 or the second light emitting unit 20 required to obtain the light of the second wavelength band is set to M2_PLD2, and the ratio of output M2_PLD1 and output M2_PLD2 is η2. In this case, η1 is different from η2. In this way, in the light source device 100a, for example, when the output of the excitation light is set to half, the output of the wavelength converted light Ln can be set to half. That is, Fig. 9 In the embodiment, when the excitation light output is changed from output M1_PLD1 or output M1_PLD2 to output M2_PLD1, the output Ph_P2 of the wavelength converted light Ln when the excitation light is output M2_PLD1 can be made approximately half of the output Ph_P1 of the wavelength converted light Ln when the excitation light is output M2_PLD1. As a result, even when the temperature of the wavelength conversion element 91 rises, the change in the chromaticity coordinates and color temperature of the light L irradiated by the light source device 100a can be reduced, and the desired chromaticity coordinates and color temperature can be obtained.

[0241] In the light source device 100a, the greater the output of the light in the first wavelength band, the smaller the ratio of the output of the light in the first wavelength band incident on the wavelength conversion element 91 to the output of the light in the second wavelength band emitted by the wavelength conversion element 91 after receiving the light in the first wavelength band. In this way, in the light source device 100a, even if the temperature of the wavelength conversion element 91 rises, the change in the chromaticity coordinates or color temperature of the light L irradiated by the light source device 100a can be reduced, and the desired chromaticity coordinates or color temperature can be obtained.

[0242] Fig.10 1 is a timing chart of output of excitation light in the first mode of the light source device 100 a . Fig.11 This is a timing chart of output of the wavelength converted light Ln in the first mode of the light source device 100 a . Fig.10 and Fig.11 The "frame" in the figure represents a specified frame period, "1frame" represents the period of the first frame, "2frame" represents the period of the second frame, and "3frame" represents the period of the third frame. Fig.11 The output 111b represents a blue light output, the output 111y represents a yellow light output, the output 111r represents a red light output, and the output 111g represents a green light output.

[0243] Fig.10 and Fig.11 The excitation light output M1_PLD1 required to obtain light including the first wavelength frequency domain in the first mode, the excitation light output M1_PLD2 required to obtain light including the second wavelength frequency domain, and their ratio η1 (= M1_PLD1 / M1_PLD2) are defined in .

[0244] on the other hand, Fig.12 2 is a timing chart of the excitation light output of the light source device 100 a in the second mode. Fig.13 1 is a timing chart of output of the wavelength converted light Ln by the light source device 100a in the second mode.

[0245] Fig.12 and Fig.13 The excitation light output M2_PLD1 required for obtaining light including the first wavelength frequency domain in the second mode, the excitation light output M2_PLD2 required for obtaining light including the second wavelength frequency domain, and their ratio η2 (= M2_PLD1 / M2_PLD2) are defined.

[0246] In the light source device 100a, the amount of light emitted by the light source device 100a in the first mode is greater than the amount of light emitted by the light source device 100a in the second mode, and η1 < η2 is satisfied. In this way, in the light source device 100a, even if the temperature of the wavelength conversion element 91 rises, the change in the chromaticity coordinates or color temperature of the light L emitted by the light source device 100a can be reduced, and the desired chromaticity coordinates or color temperature can be obtained.

[0247] In the light source device 100a, light of a first chromaticity coordinate or color temperature is irradiated in the first mode, and light of a second chromaticity coordinate or color temperature is irradiated in the second mode, and the ratio η2 is set in such a way that the first chromaticity coordinate or color temperature is substantially consistent with the second chromaticity coordinate or color temperature. In this way, even when the conversion efficiency of the wavelength conversion element 91 in the light source device 100a changes due to a temperature rise, etc., the change in the chromaticity coordinate or color temperature of the light L irradiated by the light source device 100a can be reduced, and the desired chromaticity coordinate or color temperature can be obtained.

[0248] The ratio η2 is defined as the direction in which the first chromaticity coordinate or color temperature is close to the same degree as the second chromaticity coordinate or color temperature. The so-called substantially consistent means that it is in a range in which the human eye cannot distinguish the difference in chromaticity coordinates. In general, it is preferred that ΔE*ab is less than 3.0 when expressed by the coordinate distance of the equal color space, CIE1976L*a*b* color space (CIELAB color space). As a product, less than 1.5 is more preferred. When using a device for more rigorous color evaluation, less than 0.8 is further preferred. The term "roughly" here refers to a reference of less than 3.0, but it can be appropriately determined according to the specifications required by the product.

[0249] In the light source device 100a, the wavelength conversion element 91 can emit light of the third wavelength band by receiving light of the second wavelength band, and the light source device 100a can also emit light of at least the first wavelength band and the third wavelength band. In this way, even if the temperature of the wavelength conversion element 91 in the light source device 100a rises, the change in the chromaticity coordinates or color temperature of the light L emitted from the light source device 100a can be reduced, and the desired chromaticity coordinates or color temperature can be obtained.

[0250] [Third Embodiment]

[0251] A light source device according to a third embodiment will be described below.

[0252] <Configuration of Light Source Device 100b>

[0253] Fig.14 It is a schematic diagram showing an example of the structure of a light source device 100 b according to the third embodiment of the present invention.

[0254] The light source device 100b includes a first wavelength conversion element 91a and a second wavelength conversion element 91b which are rotatable and include a wavelength conversion region 911 and a light reflection region 912. The first wavelength conversion element 91a and the second wavelength conversion element 91b have basically the same structure. The first light emitting unit 10 emits a blue first light L1, and the second light emitting unit 20 emits a blue second light L2. The first wavelength conversion element 91a receives the first light L1 through the wavelength conversion region 911 and emits wavelength-converted light Ln, and receives the first light L1 through the light reflection region 912 and emits blue reflected light Lb. The second wavelength conversion element 91b receives the second light L2 through the wavelength conversion region 911 and emits wavelength-converted light Ln, and receives the second light L2 through the light reflection region 912 and emits blue reflected light Lb. The light source device 100b emits wavelength-converted light Ln and blue reflected light Lb alternately from the light-transmitting member 3 by rotating the first wavelength conversion element 91a and the second wavelength conversion element 91b, respectively. The above is the main difference between the light source device 100b and the second embodiment.

[0255] In the light source device 100b, the lights respectively coming from the first light L1 and the second light L2 and entering the light incident surface 31 of the light-transmitting member 3 do not overlap on the light incident surface 31, so that the lights respectively coming from the first light L1 and the second light L2 can enter the light-transmitting member 3 without loss. In this way, the efficiency of extracting the light L from the light-transmitting member 3 can be improved. In the configuration of the light source device 100b, it is also possible to reduce uneven illumination when the illumination of the light L irradiated by the light source device 100 is lower than a predetermined illumination.

[0256] Fig.14 In the example, the direction in which the first light L1 is emitted by the first light emitting unit 10 included in the first light source unit 1 and the direction in which the second light L2 is emitted by the second light emitting unit 20 included in the second light source unit 2 intersect each other. The first light emitting unit 10 emits the first light L1 in the -X direction, and the second light emitting unit 20 emits the second light L2 in the +Z direction. The first light emitting unit 10 emits the first light L1 in such a way that the main ray of the first light L1 travels in the -X direction, and the second light emitting unit 20 emits the second light L2 in such a way that the main ray of the second light L2 travels in the +Z direction. The -X direction is approximately orthogonal to the +Z direction. With this configuration, the distance between the first light emitting unit 10 and the second light emitting unit 20 can be shortened, thereby reducing the space of the light source device 100b. As a result, the light source device 100b can be miniaturized.

[0257] Fig.14In the example of , the light source device 100b has a reflector 82. The first light source unit 1 has a third light guide optical system 14 for guiding the first light L1 emitted from one or more first light emitting units 10 to the light transmitting member 3. The third light guide optical system 14 has an 18th lens 141, a 19th lens 142, a 20th lens 143, a first reflector 144, a 21st lens 145, a 22nd lens 146, and a 23rd lens 147. The second light source unit 2 has a fourth light guide optical system 24 for guiding the second light L2 emitted from one or more second light emitting units 20 to the light transmitting member 3. The fourth light guide optical system 24 has a 24th lens 241, a 25th lens 242, a 26th lens 243, a second reflector 244, a 27th lens 245, a 28th lens 246, and a 29th lens 247. The lenses included in each of the third light guide optical system 14 and the fourth light guide optical system 24 are composed of glass or resin having light transmittance. The type, shape, configuration, number, etc. of the lenses included in the third light guide optical system 14 and the fourth light guide optical system 24 can be appropriately changed. In addition to lenses and reflectors, the third light guide optical system 14 and the fourth light guide optical system 24 can also include various optical elements such as diffraction elements, MEMS, and optical fibers. The number and configuration of the optical components in the third light guide optical system 14 and the fourth light guide optical system 24 can also be appropriately changed.

[0258] exist Fig.14 In the example shown in FIG. 1 , the first light L1 emitted from the first light source unit 1 passes through the vicinity of the reflector 82 and directly enters the light incident surface 31 of the light-transmitting member 3. The second light L2 emitted from the second light source unit 2 is reflected by the reflector 82 and enters the light incident surface 31 of the light-transmitting member 3. The light-transmitting member 3 transmits the first light L1 and the second light L2 that are incident through the light incident surface 31, and irradiates the light L.

[0259] Fig.14 Although the example shows that the first light L1 from the first light source unit 1 is not reflected by the reflector 82 and is directly guided to the light incident surface 31 of the light-transmitting component 3, and the second light L2 from the second light source unit 2 is reflected by the reflector 82 and is guided to the light incident surface 31 of the light-transmitting component 3, the structure is not limited to this.

[0260] For example Fig.33 As shown, the first light L1 from the first light source unit 1 and the second light L2 from the second light source unit 2 may be reflected by the corresponding reflectors 82a and 82b and guided to the light incident surface 31 of the light-transmitting member 3. The reflectors 82a and 82b only need to have a reflective function and do not necessarily need to be flat plates. The inclined surfaces of the prisms may also have a reflective function.

[0261] The number of light source units is not limited to two, and a third light source unit and a fourth light source unit may be further provided to provide three or more light source units. The present invention may be applied to at least two of the three or more light source units. In other words, the present invention may be applied to light emitted from two or more light source units and having different incident angles into the incident light transmission component 3, and is not limited by the number of light source units.

[0262] Furthermore, even if there is one light source unit physically, the light source unit may include two or more light sources. When the light-transmitting member is viewed from a direction perpendicular to the central axis of the light-transmitting member, the light emitted from each light source may include light that enters the light-transmitting member at a positive angle to the central axis of the light-transmitting member and light that enters the light-transmitting member at a negative angle to the central axis. The present invention may also be applied to such a case.

[0263] That is, the first small-angle light emitting unit 11 and the first large-angle light emitting unit 12, the second small-angle light emitting unit 21 and the second large-angle light emitting unit 22 can also constitute one light source unit. The first light guide optical system and the second light guide optical system can also constitute the same light guide optical system.

[0264] <Example of Illuminance Distribution>

[0265] Figure 15 to Figure 19 1 is an example of an illuminance distribution diagram of the light L emitted by the light source device 100 . Figure 15 to Figure 19 A plurality of examples of illuminance distribution of the light L under different conditions are shown. Each example of illuminance distribution is a result of illuminance distribution obtained by simulation calculation near the emission surface of the light-transmitting member 3 .

[0266] Fig.15 The first example shown is with Figure 4 The results for the full light mode are shown. The illuminance deviation for the first example is 6.98% relative to the entire area. The illuminance deviation is the value calculated by (maximum illuminance - minimum illuminance) / (maximum illuminance + minimum illuminance).

[0267] Fig.16 The second example shown is that the first large-angle light emitting unit 12 and the second large-angle light emitting unit 22 are lit at the same time. Figure 4 The results shown are corresponding to the first mode pattern A, the sixth mode pattern A, and the seventh mode pattern B. The illuminance deviation of the second example is 6.48% with respect to the entire area.

[0268] Fig.17 The third example shown is the illumination distribution when the first small-angle light-emitting unit 11 and the second small-angle light-emitting unit 21 are turned on. Figure 4 The results shown are those corresponding to the first mode, the sixth mode, and the seventh mode, the mode B. The illumination deviation in the third example is 6.95% for the entire area.

[0269] Fig.18 The fourth example shown is the illumination distribution when the first small-angle light-emitting unit 11 and the first large-angle light-emitting unit 12 are turned on. Figure 4 The result corresponding to the fifth mode of mode A. The illuminance deviation of the fourth example is 7.78% relative to the entire area.

[0270] Fig.19 The fifth example shown is the illumination distribution when the first small-angle light-emitting section 11 and the first large-angle light-emitting section 12 are turned on. Figure 4 The result corresponding to the fifth pattern of pattern B. The illumination deviation of the fifth example is 7.56% with respect to the entire area.

[0271] As can be seen from the above, the illuminance deviation in the first to fifth examples is 10% or less, and the illuminance unevenness can be reduced. The first to third examples can reduce the illuminance unevenness compared with the fourth and fifth examples.

[0272] The above is the illumination deviation specified in the entire required lighting area, which is a very ideal setting of less than 10%. Therefore, this value is sufficient to achieve the purpose of the embodiment of the present invention, that is, a light source device with reduced illumination unevenness. On the other hand, when used in a projection device, it is not necessarily necessary to control the illumination deviation of all areas of the entire surface to less than 10%. For example, if the required illumination deviation is ensured within a range of, for example, 90% from the center of the image to the periphery, there is sometimes no problem in actual use. It depends on the specification requirements of the equipment used.

[0273] Generally speaking, if the deviation exceeds 50%, it is definitely possible to identify uneven illumination, and if the deviation drops to around 30%, it is considered that the uneven illumination is not significant. The uneven illumination within the projection image screen of the projection device is largely presented as the cumulative result of the illumination deviation of the light source device, the light deviation of the illumination optical system that illuminates the panel, and the light deviation of the projection lens. The projection device, which is the sum of the light source device, the lighting system, and the projection system, can have sufficient quality even if it is alone if its illumination deviation is below 30%. Since it is impossible to simply eliminate the uneven illumination of the device by increasing the illumination deviation of the light source device itself, and it also depends on the light deviation of the illumination optical system and the projection lens, the illumination deviation required for the light source device can be determined by matching some specifications.

[0274] In situations where strict control of illumination deviation is required, such as stacked projection of multiple overlapping projection devices, especially tiled projection of projecting multiple docking screens, if the illumination deviation of each projection device is different, the illumination at the junction of docking screens will be obviously uneven. These situations are exactly applicable to the embodiments of the present invention.

[0275] On the other hand, in addition to the above-mentioned stacked projection and tiled projection, when the projection device is used alone for projection, it is not necessary to manage the illumination deviation so strictly. In addition, when used in a bright place other than a dark room, the uneven illumination of the projected image will become less obvious due to the bright background. It is a well-known fact that the appearance of uneven illumination changes with the use environment. Therefore, if the first light source unit 1 and the second light source unit 2 can each meet the target value of the illumination deviation within a certain range from the center of the screen to the surrounding area, it is sufficient to drive only the first light source unit 1 for a certain period of time. Similarly, it is sufficient to drive only the second light source unit 2 for a certain period of time. In other words, as long as the illumination deviation values ​​of the first light source unit 1 and the second light source unit 2 are small, each light source unit can be driven individually at a specified switching cycle.

[0276] The smaller the difference in the illuminance deviation value between the first light source unit 1 and the second light source unit 2, the better. Therefore, when the projection device is used alone, when the illuminance deviation between the first light source unit 1 and the second light source unit 2 is less than the expected value, the purpose of the present invention can be achieved even if the first light source unit 1 and the second light source unit 2 are switched. Here, the expected value is as follows: Fig.18 The fourth example shown, Fig.19 As shown in the fifth example, the entire area is preferably 10% or less. The light source device is preferably 10%, and the illumination unevenness of the illumination optical system and the projection optical system is superimposed on this. The illumination unevenness of the projection device is preferably 30% or less.

[0277] If the illumination optical system and the projection optical system can be constructed ideally, each is 5%, and the total is 10%, then the light source device allows 20%. In this way, if the light quantity deviation of the illumination optical system and the projection optical system is small, the value of the illumination deviation required by the device becomes larger.

[0278] On the other hand, when using multiple projection devices and a control system that performs multiple projection controls on these projection devices to perform tile projection, the smaller the uneven illumination of adjacent projected images, the brighter and more efficient projection system can be built to reduce the burden of image processing in the peripheral area.

[0279] <Modification>

[0280] Fig. 20 It is a schematic diagram showing an example of the configuration of a light source device 100 c according to a modification of the third embodiment of the present invention.

[0281] This modification example is mainly different from the third embodiment in that a light source device 100c includes a prism 83 instead of a reflector 82. The light source device 100c including the prism 83 can also obtain the same effects as those of the third embodiment.

[0282] [Fourth Embodiment]

[0283] A projection device according to a fourth embodiment will be described below. Fig.21 It is a schematic diagram showing the structure of a projection device 50 according to a fourth embodiment of the present invention.

[0284] The main difference between this embodiment and the first embodiment is that the projection device 50 includes a light source device 100 , a light modulation unit 540 that spatially modulates the light L emitted from the light source device 100 , and a projection unit 520 that projects the light L modulated by the light modulation unit 540 .

[0285] exist Fig.21 In the example shown, the projection device 50 is Figure 1 The light source device 100 shown has an illumination optical system 510 and a projection unit 520 downstream in the light irradiation direction. Light L emitted from the light-transmitting component 3 of the light source device 100 enters the illumination optical system 510. The illumination optical system 510 outputs light L to the projection unit 520. Various elements such as a color wheel 530 and a light modulation unit 540 are provided inside the illumination optical system 510. The color wheel 530 is a disk formed of a red, blue or green color filter in one body, and allows the light L from the light source device 100 to pass through while rotating, thereby converting the light L into light divided into red, green or blue by time. The light modulation unit 540 is composed of a liquid crystal panel or a DMD (Digital Micromirror Device), etc., and spatially modulates the light L from the color wheel 530.

[0286] The projection unit 520 outputs the light L modulated by the light modulation unit 540 of the illumination optical system 510 as a projection image P. Fig.21 The direction (Y direction) in which the projection image P is output from the projection unit 520 is orthogonal to the optical axis direction (X direction) of the light L output from the light source device 100. In other words, the optical axis direction of the output light L of the light source device 100 is perpendicular to the arrangement direction (Y direction) of the illumination optical system 510 and the projection unit 520 in the light source device 100. In this case, the light L of the light source device 100 is directly input to the illumination optical system 510.

[0287] The projection device 50 includes the light source device 100, and thus, when the illuminance of the light L irradiated by the light source device 100 is less than the prescribed illuminance, the uneven illuminance can be reduced. By setting the illuminance to be less than the prescribed illuminance, the life of the light source device 100 is extended, and thus the replacement frequency of the light source device 100 can be reduced, and the maintenance man-hours of the projection device 50 can be reduced. Furthermore, by reducing the uneven illuminance of the light L irradiated by the light source device 100, the uneven brightness of the projected image P can be reduced, and the quality of the projected image P can be improved.

[0288] In the light source device 100 provided in the projection device 50, the driving unit 4 turns off the first light source group G1 and the second light source group G2 alternately at a predetermined switching cycle (see Figure 1 ), or the light amount of the first light L1 from the first light source group G1 and the light amount of the second light L2 from the second light source group G2 are alternately reduced. In this case, the light modulator 540 generates a projection image at a predetermined frame period, and the length of the switching period is set to be less than the length of the above-mentioned frame period. In this way, a person who views the projection image of the projection device 50 can hardly recognize the switching between the first light source group G1 and the second light source group G2. In addition, Figure 4 In the fifth mode shown, when switching between lighting of the first small-angle light-emitting unit 11 and the first large-angle light-emitting unit 12 and lighting of the second small-angle light-emitting unit 21 and the second large-angle light-emitting unit 22, the length of the switching cycle can be set to be less than the above frame cycle. In this case, a person observing the projected image of the projection device 50 can hardly recognize the switching between the first light source group G1 and the second light source group G2.

[0289] In the light source device 100 provided in the projection device 50, the driving unit 4 alternately turns off the first light source group G1 and the second light source group G2, or alternately reduces the light amount of the first light L1 from the first light source group G1 and the light amount of the second light K2 from the second light source group G2. In this case, each time the projection device 50 is started, the driving unit 4 may alternately turn off the first light source group G1 and the second light source group G2, or alternately reduce the light amount of the first light L1 from the first light source group G1 and the light amount of the second light L2 from the second light source group G2. In this way, when the illuminance of the light L irradiated by the light source device 100 is less than the specified illuminance, the uneven illuminance is reduced and the uneven illuminance becomes less noticeable.

[0290] The interval (switching cycle) of alternately extinguishing the first light source unit 1 and the second light source unit 2 or alternately reducing the light amount of the first light L1 and the second light L2 is preferably a time equivalent to one frame of 24 to 50fps (frame number) often used when generating images. If the illumination deviation between the first light source unit 1 and the second light source unit 2, or the illumination deviation between the first light L1 and the second light amount is small enough, the switching cycle does not have to be very fast, and can also be a cycle of equal length each time the device is started.

[0291] The projection device 50 may include the light source device 100a, the light source device 100b, or the light source device 100c instead of the light source device 100. However, since the light source device 100a includes the color wheel 92, the color wheel 530 may not be provided in the illumination optical system 510 when the projection device 50 includes the light source device 100a.

[0292] [Modifications]

[0293] Various other examples of embodiments of the present invention will be described below.

[0294] <First example>

[0295] Fig. 22 FIG. 1 is another functional block diagram of the control unit 5 included in the light source device 100. Fig. 22 In the example, the control unit 5 of this example has an image signal detection unit 507 which is connected to Figure 3 The main differences of the control unit 5 are shown.

[0296] When the light source device 100 is continuously operated in a specific operation mode other than the full lamp mode, a specific light-emitting portion continues to deteriorate, and sometimes there will be a deviation in the usage time between the light-emitting portions. For example, in the case where the light-emitting portion includes a semiconductor laser element, even if it is continuously used under the same lighting driving conditions (current, temperature, etc.), the output will become about half after a long period of use (for example, 20,000 hours). Therefore, it is preferred that the usage time is always averaged in the first small-angle light-emitting portion 11 and the first large-angle light-emitting portion 12 of the first light-emitting portion 10, and the second small-angle light-emitting portion 21 and the second large-angle light-emitting portion 22 of the second light-emitting portion 20. By averaging the usage time, the deviation in light source output caused by switching of operation modes can be reduced.

[0297] In this example, the image signal detection unit 507 detects the connection of an image signal cable such as HDMI (High-Definition Multimedia Interface, registered trademark) with the I / F 55, or receives an image signal from an external PC or an external server via a network. After detecting the connection of the image signal cable or the reception of the image signal, the image signal detection unit 507 can determine the resolution, frame rate, display mode (color format or 3D, etc.), etc.

[0298] The control unit 5 controls the operation of each of the first small-angle light-emitting unit 11, the first large-angle light-emitting unit 12, the second small-angle light-emitting unit 21, and the second large-angle light-emitting unit 22 based on the information of the resolution, frame rate, and display mode determined by the image signal detection unit 507, so as to average the use time of the first small-angle light-emitting unit 11, the first large-angle light-emitting unit 12, the second small-angle light-emitting unit 21, and the second large-angle light-emitting unit 22. Therefore, in the light source device 100, the change in the use time of the first small-angle light-emitting unit 11, the first large-angle light-emitting unit 12, the second small-angle light-emitting unit 21, and the second large-angle light-emitting unit 22 can be reduced, and the change in the light source output caused by the switching of the operation mode can be reduced.

[0299] <Second example>

[0300] As described in the first embodiment of the present invention, the light source device 100 can switch the light source groups such as the first light source group G1 and the second light source group G2 every time the light source device 100 is activated. Fig.23 This is an example of an operation flow chart of the light source device 100 when the light source group is switched every time the light source device 100 is activated.

[0301] exist Fig.23 In the example of , first, in step S21 , the light source device 100 determines whether the next startup of the light source device 100 has been executed.

[0302] In step S21, if it is determined that it is not executed (step S21, no), the light source device 100 repeatedly performs the action of step S21 until it is determined that the next startup of the light source device 100 is executed. On the contrary, when it is determined that it is executed in step S21 (step S21, yes), in step S22, the light source device 100 switches the light source group to be lit. Then, the light source device 100 ends the action.

[0303] As described above, the light source device 100 may switch the light source group every time the light source device 100 is activated.

[0304] <Third Example>

[0305] As described in the first embodiment of the present invention, the light source device 100 can switch the light source groups such as the first light source group G1 and the second light source group G2 every predetermined time, predetermined number of days, predetermined cumulative lighting time, etc. Fig.24 This is an example of an operation flow chart of the light source device 100 when the light source group is switched every predetermined time, predetermined number of days, or predetermined cumulative lighting time.

[0306] exist Fig.24 In the example of , first, in step S31 , the light source device 100 determines whether or not a predetermined time, a predetermined number of days, or a cumulative lighting time has arrived.

[0307] If it is determined in step S31 that the time has not been reached (step S31 , No), the light source device 100 repeats the operation in step S31 until it is determined that any one of the predetermined time, the predetermined number of days, or the accumulated lighting time has been reached.

[0308] On the contrary, when it is judged that it has been reached in step S31 (step S31, yes), the light source device 100 determines whether the next startup has been executed in step S32. If it is judged that it has not been executed in step S32 (step S32, no), the light source device 100 repeatedly performs the action of step S32 until it is judged that the next startup of the light source device 100 has been executed. On the contrary, when it is judged that it has been executed in step S32 (step S32, yes), in step S33, the light source device 100 switches the light source group to be lit. After that, the light source device 100 ends the action.

[0309] As described above, the light source device 100 can switch the light source groups such as the first light source group G1 and the second light source group G2 at predetermined time intervals, predetermined number of days, or predetermined cumulative lighting time.

[0310] <Case 4>

[0311] The light source device 100 may switch the light source groups such as the first light source group G1 and the second light source group G2 to be used after a predetermined time has passed since the start-up period. Fig.25 This is an example of an operation flow chart of the light source device 100 when the light source group is switched after a predetermined time has passed since startup.

[0312] exist Fig.25 In the example of , first, in step S41 , the light source device 100 determines whether the time elapsed after the light source device 100 is activated has reached a predetermined time.

[0313] When it is determined in step S41 that the operation is not being performed (step S41 , No), the light source device 100 repeats the operation in step S41 until it is determined that the time elapsed after the activation of the light source device 100 reaches a predetermined time.

[0314] On the contrary, when it is determined in step S41 that the light source has been reached (step S41, Yes), in step S42, the light source device 100 switches the light source group to be turned on. Then, the light source device 100 ends the operation.

[0315] As described above, the light source device 100 can switch the light source group to be used after a predetermined time has passed since the light source device 100 was activated.

[0316] For example, as shown in the third example, at intervals of a specified time, a specified number of days, or a specified cumulative lighting time, the light source group used is switched at the next startup after the time is reached. However, when the light source device 100 is driven for a long time for sign applications, it is sometimes difficult to reach the next startup time. For this reason, a deviation occurs between the set switching time and the actual switching time, resulting in differences in the operating time of each light source group, which may cause uneven illumination. Even during startup, as long as the light source group is switched immediately after the specified time has passed, the driving time of multiple light source groups can be kept equal.

[0317] <Fifth Example>

[0318] The light source device 100 may switch the light source groups to be used, such as the first light source group G1 and the second light source group G2, when a predetermined time has passed after the activation and when the input signal is switched. Fig.26 This is an example of an operation flow chart of switching the light source group of the light source device 100 when a predetermined time has passed after startup and the input signal is switched.

[0319] exist Fig.26As an example, first in step S51, the light source device 100 determines whether the time elapsed after the light source device 100 is activated reaches a predetermined time.

[0320] In step S51 , when it is determined that the time has not been reached (No in step S51 ), the light source device 100 repeats the operation in step S51 until it is determined that the time elapsed after the light source device 100 is activated has reached the prescribed time.

[0321] On the other hand, when it is determined in step S51 that it has been reached (Yes in step S51), in step S52, the light source device 100 determines whether the input signal switching has occurred. When it is determined in step S52 that it has not occurred (No in step S52), the light source device 100 repeatedly performs the action of step S52 until it is determined that the input signal switching has occurred. On the other hand, when it is determined in step S52 that it has occurred (Yes in step S52), in step S53, the light source device 100 switches the light source group that is lit.

[0322] As described above, the light source device 100 can switch the light source group to be used when a predetermined time has passed after activation and when the input signal is switched.

[0323] For example, if the light source group is switched immediately during the startup process, image interruption may occur during normal use other than for signage purposes, confusing the user of the light source device 100. In this example, the light source group can be switched to reduce image interruption when a certain projection switching occurs, such as switching of input signals, display of test mode, projection of a sign waiting for input, and when a predetermined time has passed after startup.

[0324] <Sixth Example>

[0325] The light source device 100 may also change the predetermined switching time according to the degradation condition of the light source group used. Fig. 27 and Fig.28 Describe specific examples. Fig. 27 This is an example of an operation flow chart for changing the predetermined time for switching the light source device 100 . Fig.28 This is a schematic diagram of an example of the (X+1)th switching period. Fig.28 The X-axis represents time and the Y-axis represents brightness.

[0326] exist Fig. 27 In the example shown, first, in step S61 , the light source device 100 obtains and stores the brightness a1 using the color sensor when the first light source group G1 starts lighting.

[0327] Next, in step S62, the light source device 100 determines whether the specified time has been reached. When it is determined in step S62 that the specified time has not been reached (No in step S62), the light source device 100 repeats the action of step S62 until it is determined that the specified time has been reached. On the contrary, if it is determined in step S62 that the specified time has been reached (Yes in step S62), in step S63, the light source device 100 uses the color sensor to obtain the brightness a2 at that time and saves it.

[0328] Next, in step S64 , the light source device 100 obtains and stores the changes in the brightness a1 and the brightness a2 of the first light source group G1 .

[0329] Next, in step S65 , the light source device 100 switches the light source group, obtains the brightness a1 of the second light source group G2 , and stores it.

[0330] Next, in step S66, the light source device 100 determines whether the specified time has been reached. If it is determined in step S66 that it has not been reached (No in step S66), the light source device 100 repeats the operation of step S66 until it is determined that it has been reached. On the contrary, if it is determined in step S66 that it has been reached (Yes in step S66), in step S67, the light source device 100 uses the color sensor to obtain the brightness a2 at that time and saves it.

[0331] Next, in step S68 , the light source device 100 obtains and stores the changes in the brightness a1 and the brightness a2 of the second light source group G2 .

[0332] Next, in step S69 , the light source device 100 compares the respective changes of the first light source group G1 and the second light source group G2 that are stored separately.

[0333] Then, in step S70, it is determined whether the change amount of the first light source group G1 is less than the change amount of the second light source group G2. If it is determined in step S70 that the change amount of the first light source group G1 is smaller (yes in step S70), then in step S71, the light source device 100 determines that the light source of the first light source group G1 is less degraded, and switches the light source group from the second light source group G2 to the first light source group G1. At this time, the light source device 100 extends the time of the next switch by +α time, that is, the lighting time of the first light source group G1 is extended by +α time. Then, the light source device 100 ends the operation.

[0334] On the contrary, when it is determined in step S70 that the change in the first light source group G1 is not less than the change in the second light source group G (No in step S70), then in step S72, the light source device 100 determines that the degradation of the light source of the second light source group G2 is less, and does not immediately switch to the first light source group G1, but directly extends the lighting time of the second light source group G2 by +α time.

[0335] Next, in step S73, the light source device 100 determines whether the extended time has been reached. If it is determined in step S73 that it has not been reached (step S73, no), the light source device 100 repeats the action of step S73 until it is determined that it has been reached. On the contrary, when it is determined in step S73 that it has been reached (step S73 is yes), in step S74, the light source device 100 switches the light source group to the first light source group G1. Then, the light source device 100 ends the action. The extended time (extended time) in step S73 can be determined, for example, by using the corresponding table with the brightness change amount shown in Table 1 below.

[0336] Table 1

[0337] Brightness change Extended time ～x +p hours y~z +q hours … …

[0338] This example can reduce the uneven illumination caused by the degradation of one of the two light source groups after the light source device 100 is driven for a long time.

[0339] <Case 7>

[0340] Next, another configuration of the projection device 50 will be described as a seventh example. Fig.29 FIG. 5 is a schematic diagram showing another structure of a projection device 50 .

[0341] Fig.29 The projection device 50 shown is Figure 1 The light source device 100 shown has an illumination optical system 510 and a projection unit 520 on the downstream side of the light irradiation direction, that is, the side where the light is emitted from the light source device 100. The light L is emitted from the light-transmitting member 3 of the light source device 100 and enters the illumination optical system 510. The illumination optical system 510 emits the light L to the projection unit 520. The illumination optical system 510 includes a color wheel 530, a light modulation unit 540, and an actuator 550.

[0342] Even if the physical resolution is full HD (High Definition), the light modulator 540 can achieve pseudo high resolution by combining with the actuator 550. When the projection device 50 detects a high-resolution image signal such as 4K through the image signal detection unit 507, the light modulator 540 modulates the light L as the projection image P. At this time, the projection device 5 drives the actuator 550 in such a manner that the projection image P is rotated at four positions (in the order of upper left, upper right, lower right, and lower left when viewed from the center position) while shifting the projection position of the projection image P on the screen by 1 / 2 pixel in both the horizontal and vertical directions. In order to generate one frame of a 4K image, four sub-frames are output from the light modulator 540.

[0343] When the image signal detection unit 507 detects a 3D image signal, the projection device 50 projects the light L modulated by the light modulation unit 540 as a projection image P. At this time, the projection image P sequentially projects the images for the right eye and the left eye on the screen. In order to generate one frame of 3D image, two sub-frames are output from the light modulation unit 540. The user of the projection device 50 observes the screen through the glasses that can control the filter for the right eye or the left eye at a time synchronized with the projection image P to recognize the 3D image.

[0344] <Case 8>

[0345] Next, various operation modes of the light source device 100 will be described as an eighth example. Figure 30 to Figure 32 It is a schematic diagram of various operation modes of the light source device 100 according to the embodiment of the present invention. Fig.30 1 is a schematic diagram of a first example of an operation mode of the light source device 100 . Fig.31 2 is a schematic diagram of a second example of the operation mode of the light source device 100 . Fig.32 is a schematic diagram of a third example of an operation mode of the light source device 100. Figure 30 to Figure 32 In FIG. 1 , the signal indicated by the shaded portion tilted downward to the right represents the blue light emission time of the light source device 100. The signal indicated by the shaded portion tilted upward to the right represents the green light emission time of the light source device 100. The signal indicated by the shaded portion tilted horizontally represents the yellow light emission time of the light source device 100.

[0346] Fig.30 Display switches to 4K every frame Figure 4 Among the four operation modes shown, the lighting mode of the double life mode (mode A and mode B of the first mode) is the operation of the light source device 100 .

[0347] Fig.31 When the display image signal detection unit 507 receives, for example, a full HD image, it switches the full HD image signal to the full HD image signal. Figure 4 The operation of the light source device 100 is performed in the lighting mode of the double life mode among the operation modes (mode A and mode B of the first mode).

[0348] Fig.32 When the display image signal detection unit 507 receives, for example, a full HD (3D) image, it switches the display image signal detection unit 507 to the display image signal detection unit 507 for each full HD (3D) frame. Figure 4 The operation of the light source device 100 is performed in the lighting mode of the double life mode among the operation modes (mode A and mode B of the first mode).

[0349] Although the preferred embodiments have been described in detail above, the present invention is not limited to the above embodiments, and various modifications and substitutions may be made to the above embodiments without departing from the spirit of the present invention.

[0350] The numbers such as ordinal numbers and quantities used in the description of the embodiments are exemplified for the purpose of specifically describing the technology of the present invention and are not limited to the exemplified numbers. The connection relationship between the constituent elements is exemplified for the purpose of specifically describing the technology of the present invention and the connection relationship for realizing the functions of the present invention is not limited thereto.

[0351] The module division in the functional block diagram is just an example. Multiple modules can be implemented as one module, or one module can be divided into multiple modules, or part of the functions can be transferred to other modules. The functions of multiple modules with similar functions can also be processed in parallel or time-sharing by a single hardware or software. It is also possible to distribute some or all functions on multiple computers.

[0352] Embodiments of the present invention are exemplified below.

[0353] <1> A light source device, comprising:

[0354] A first light source unit emits a first light from one or more first light emitting units;

[0355] A second light source unit emits a second light from one or more second light emitting units;

[0356] a light-transmitting component for transmitting the incident first light and second light; and

[0357] a driving unit, for individually driving one or more of the first light emitting units and one or more of the second light emitting units,

[0358] The light source device emits the first light and the second light transmitted through the light-transmitting member,

[0359] The driving unit reduces the light amount of the first light emitted from one or more of the first light emitting units and the second light emitted from one or more of the second light emitting units, or turns off one or more of the first light emitting units and one or more of the second light emitting units, respectively.

[0360] When the light-transmitting member is observed from a direction perpendicular to the central axis of the light-transmitting member, the first light enters the light-transmitting member at a positive angle to the central axis.

[0361] When the light transmissive member is viewed from a direction perpendicular to the central axis of the light transmissive member, the second light enters the light transmissive member at a negative angle to the central axis.

[0362] <2> According to the <1> The light source device, wherein:

[0363] A control unit is provided for controlling the operation of the driving unit.

[0364] The control unit includes a light emitting control unit.

[0365] The light-emitting control unit is configured to individually reduce the amount of the first light emitted by one or more of the first light-emitting units and the amount of the second light emitted by one or more of the second light-emitting units, or to individually extinguish one or more of the first light-emitting units and one or more of the second light-emitting units, and at the same time, when the light-transmitting component is observed from a direction orthogonal to the central axis, the second light is controlled in such a manner that it enters the light-transmitting component at the negative angle to the central axis.

[0366] <3> According to the <1> or <2> The light source device, wherein:

[0367] The first light source unit has two or more first light emitting units including a first small-angle light emitting unit and a first large-angle light emitting unit.

[0368] The second light source unit has two or more second light emitting units including a second small-angle light emitting unit and a second large-angle light emitting unit.

[0369] When the light-transmitting component is viewed from a direction orthogonal to the central axis, an absolute value of an angle formed by a principal ray of the first light emitted from the first small-angle light-emitting portion and incident on the light-transmitting component and the central axis is smaller than an absolute value of an angle formed by a principal ray of the first light emitted from the first large-angle light-emitting portion and incident on the light-transmitting component and the central axis,

[0370] When the light-transmitting component is viewed from a direction orthogonal to the central axis, the absolute value of the angle formed by the main light ray of the second light emitted from the second small-angle light-emitting portion and incident on the light-transmitting component and the central axis is smaller than the absolute value of the angle formed by the main light ray of the second light emitted from the second large-angle light-emitting portion and incident on the light-transmitting component and the central axis.

[0371] <4> According to the <3> The light source device, wherein:

[0372] When the light-transmitting component is viewed from a direction orthogonal to the central axis, the absolute value of the angle formed by the principal ray of the first light emitted from the first low-angle light-emitting portion and incident on the light-transmitting component and the central axis is equal to the absolute value of the angle formed by the principal ray of the second light emitted from the second low-angle light-emitting portion and incident on the light-transmitting component and the central axis,

[0373] When the light-transmitting component is viewed from a direction orthogonal to the central axis, the absolute value of the angle formed by the principal ray of the first light emitted from the first large-angle light-emitting portion and incident on the light-transmitting component and the central axis is equal to the absolute value of the angle formed by the principal ray of the second light emitted from the second small-angle light-emitting portion and incident on the light-transmitting component and the central axis.

[0374] <5> According to the <3> or <4> The light source device, wherein:

[0375] The first small-angle light-emitting portion and the second small-angle light-emitting portion constitute a first light source group,

[0376] The first large-angle light emitting portion and the second large-angle light emitting portion constitute a second light source group,

[0377] The driving part alternately turns off the first light source group and the second light source group, or alternately reduces the light amount of the first light from the first light source group and the light amount of the second light from the second light source group.

[0378] <6> According to the <5> The light source device described above, wherein the driving unit alternately turns off the first light source group and the second light source group according to a predetermined switching cycle, or alternately reduces the light amount of the first light from the first light source group and the light amount of the second light from the second light source group.

[0379] <7> According to the <1> to <6> In any one of the light source devices, the first light emitting section and the second light emitting section each include at least one of a light emitting diode element and a semiconductor laser element.

[0380] <8> According to the <1> to <7> The light source device as described in any one of the preceding claims, wherein:

[0381] It also has a rotatable wavelength conversion element, the wavelength conversion element including a wavelength conversion area and a light reflection area,

[0382] The first light emitting unit emits the first blue light.

[0383] The second light emitting unit emits the second blue light.

[0384] The wavelength conversion element receives the first light and the second light in the wavelength conversion region to emit wavelength converted light, and receives the first light and the second light in the light reflection region to emit blue reflected light.

[0385] As the wavelength conversion element rotates, the wavelength converted light and the blue reflected light are alternately irradiated from the light transmitting member.

[0386] <9> According to the <8> The light source device, wherein:

[0387] The first light and the second light are lights of a first wavelength band,

[0388] The wavelength conversion element receives the first light and the second light to emit light of a second wavelength band different from the first wavelength band.

[0389] When the period during which the light source device radiates the light of the first wavelength band without passing through the wavelength conversion element is set to t1, and the period during which the light source device radiates the light of the second wavelength band from the wavelength conversion element is set to t2, t1 is different from t2.

[0390] The method comprises a first mode and a second mode, wherein in the first mode, the light of the first wavelength band at t1 and the light of the second wavelength band at t2 are irradiated respectively with at least a portion of the wavelength bands, or at least a portion of the periods of t1 and t2 are combined to irradiate a first output light, and in the second mode, a second output light different from the first output light is irradiated,

[0391] When set in the first mode, the output of the first light source unit required to obtain the light of the first wavelength band is M1_PLD1, the output of the first light-emitting unit or the second light-emitting unit required to obtain the light of the second wavelength band is set to M1_PLD2, and the ratio of M1_PLD1 to M1_PLD2 is η1. In the second mode, the output of the first light-emitting unit or the second light-emitting unit required to obtain the light of the first wavelength band is M2_PLD1, the output of the first light-emitting unit or the second light-emitting unit required to obtain the light of the second wavelength band is M2_PLD2, and when the ratio of M2_PLD1 to M2_PLD2 is η2, η1 is different from η2.

[0392] <10> According to the <9> The light source device described above, wherein the greater the output of the light in the first wavelength band, the smaller the ratio of the output of the light in the first wavelength band incident on the wavelength conversion element to the output of the light in the second wavelength band emitted by the wavelength conversion element after receiving the light in the first wavelength band.

[0393] <11> According to the <9> or <10> The light source device described above, wherein the light amount of the light irradiated from the light source device in the first mode is greater than the light amount of the light irradiated from the light source device in the second mode, and η1<η2 is satisfied.

[0394] <12> According to the <9> to <11> The light source device according to any one of the preceding claims, wherein:

[0395] In the first mode, light of a first chromaticity coordinate is irradiated, and in the second mode, light of a second chromaticity coordinate is irradiated,

[0396] The η2 is determined in such a way that the first chromaticity coordinate and the second chromaticity coordinate are consistent.

[0397] <13> According to the <9> to <12> The light source device according to any one of the preceding claims, wherein:

[0398] The wavelength conversion element is capable of emitting light in the third wavelength band by receiving light in the second wavelength band.

[0399] The light source device emits at least light of the first wavelength band and light of the third wavelength band.

[0400] <14> According to the <1> to <13> The light source device as described in any one of the preceding claims, wherein:

[0401] The device further comprises a first wavelength conversion element and a second wavelength conversion element which include a wavelength conversion region and a light reflection region and are rotatable.

[0402] The first light emitting unit emits the first blue light.

[0403] The second light emitting unit emits the second blue light.

[0404] The first wavelength conversion element receives the first light in the wavelength conversion region to emit wavelength converted light, and receives the first light in the light reflection region to emit blue reflected light.

[0405] The second wavelength conversion element receives the second light in the wavelength conversion region to emit the wavelength converted light, and receives the second light in the light reflection region to emit blue reflected light.

[0406] The first wavelength conversion element and the second wavelength conversion element rotate respectively, so that the wavelength converted light and the blue reflected light are alternately irradiated from the light transmitting member.

[0407] <15> According to the <1> to <14> A light source device as described in any one of claims , wherein the first light source unit and the second light source unit are alternately lit.

[0408] <16> According to the <1> to <14> A light source device as described in any one of claims , wherein the first light source unit and the second light source unit are lit at the same time.

[0409] <17> A light source device, comprising:

[0410] A first light source unit emits a first light from one or more first light emitting units;

[0411] A second light source unit emits a second light from one or more second light emitting units;

[0412] A light-transmitting component, capable of transmitting the incident first light and second light;

[0413] a driving unit, configured to individually drive one or more of the first light emitting units and one or more of the second light emitting units; and

[0414] A control unit, used to control the action of the driving unit,

[0415] The light source device emits the first light and the second light through the light-transmitting member,

[0416] The driving unit individually reduces the light amount of the first light emitted from each of the one or more first light emitting units and the second light emitted from each of the one or more second light emitting units, or turns off each of the one or more first light emitting units and the one or more second light emitting units.

[0417] When the light-transmitting component is observed from a direction orthogonal to the central axis of the light-transmitting component, the control unit alternately switches, at a predetermined switching cycle, a state in which both the first light and the second light are incident on the light-transmitting component at a positive angle to the central axis of the light-transmitting component and a state in which both the first light and the second light are incident on the light-transmitting component at a negative angle to the central axis.

[0418] <18> A projection device, comprising:

[0419] according to <1> to <17> The light source device according to any one of the above;

[0420] a light modulating unit configured to spatially modulate the light emitted from the light source device; and

[0421] The projection unit is used for projecting the light modulated by the light modulation unit.

[0422] <19> A projection device, comprising:

[0423] according to <6> or <17> The light source device;

[0424] a light modulating unit configured to spatially modulate the light emitted from the light source device; and

[0425] a projection unit, configured to project the light modulated by the light modulation unit,

[0426] The light modulator generates a projection image in a predetermined frame period, and the length of the switching period is less than or equal to the length of the frame period.

[0427] <20> A projection device, comprising:

[0428] according to <5> The light source device;

[0429] a light modulating unit configured to spatially modulate the light emitted from the light source device; and

[0430] a projection unit, configured to project the light modulated by the light modulation unit,

[0431] Whenever the projection device is started, the driving unit alternately turns off the first light source group and the second light source group, or alternately reduces the light amount of the first light from the first light source group and the light amount of the second light from the second light source group.

Claims

1. A light source device, comprising: A first light source unit emits a first light from one or more first light emitting units; A second light source unit emits a second light from one or more second light emitting units; a light-transmitting component for transmitting the incident first light and second light; and a driving unit, for individually driving one or more of the first light emitting units and one or more of the second light emitting units, The light source device emits the first light and the second light transmitted through the light-transmitting member, The driving unit individually reduces the amount of the first light emitted from each of the at least one first light emitting unit and the amount of the second light emitted from each of the at least one second light emitting unit, or individually turns off one of the at least one first light emitting unit and one of the at least one second light emitting unit, When the light-transmitting member is observed from a direction perpendicular to the central axis of the light-transmitting member, the first light enters the light-transmitting member at a positive angle to the central axis. When the light transmissive member is viewed from a direction orthogonal to a central axis of the light transmissive member, the second light enters the light transmissive member at a negative angle with respect to the central axis.

2. The light source device according to claim 1, wherein: A control unit is provided for controlling the operation of the driving unit. The control unit includes a light emitting control unit. The light-emitting control unit is configured to individually reduce the amount of the first light emitted by one or more of the first light-emitting units and the amount of the second light emitted by one or more of the second light-emitting units, or to individually extinguish one or more of the first light-emitting units and one or more of the second light-emitting units, and at the same time, when the light-transmitting component is viewed from a direction orthogonal to the central axis, the second light is controlled in such a manner that it enters the light-transmitting component at the negative angle with respect to the central axis.

3. The light source device according to claim 1, wherein: The first light source unit has two or more first light emitting units including a first small-angle light emitting unit and a first large-angle light emitting unit. The second light source unit has two or more second light emitting units including a second small-angle light emitting unit and a second large-angle light emitting unit. When the light-transmitting component is viewed from a direction orthogonal to the central axis, an absolute value of an angle formed by a principal ray of the first light emitted from the first small-angle light-emitting portion and incident on the light-transmitting component and the central axis is smaller than an absolute value of an angle formed by a principal ray of the first light emitted from the first large-angle light-emitting portion and incident on the light-transmitting component and the central axis, When the light-transmitting component is viewed from a direction orthogonal to the central axis, the absolute value of the angle formed by the main light ray of the second light emitted from the second small-angle light-emitting portion and incident on the light-transmitting component and the central axis is smaller than the absolute value of the angle formed by the main light ray of the second light emitted from the second large-angle light-emitting portion and incident on the light-transmitting component and the central axis.

4. The light source device according to claim 3, wherein: When the light-transmitting component is viewed from a direction orthogonal to the central axis, the absolute value of the angle formed by the principal ray of the first light emitted from the first low-angle light-emitting portion and incident on the light-transmitting component and the central axis is equal to the absolute value of the angle formed by the principal ray of the second light emitted from the second low-angle light-emitting portion and incident on the light-transmitting component and the central axis, When the light-transmitting component is viewed from a direction orthogonal to the central axis, the absolute value of the angle formed by the principal ray of the first light emitted from the first large-angle light-emitting portion and incident on the light-transmitting component and the central axis is equal to the absolute value of the angle formed by the principal ray of the second light emitted from the second large-angle light-emitting portion and incident on the light-transmitting component and the central axis.

5. The light source device according to claim 3, wherein: The first small-angle light-emitting portion and the second small-angle light-emitting portion constitute a first light source group, The first large-angle light emitting portion and the second large-angle light emitting portion constitute a second light source group, The driving part alternately turns off the first light source group and the second light source group, or alternately reduces the light amount of the first light from the first light source group and the light amount of the second light from the second light source group.

6. The light source device according to claim 5, wherein: The driving unit alternately turns off the first light source group and the second light source group or alternately reduces the light amount of the first light from the first light source group and the light amount of the second light from the second light source group according to a predetermined switching cycle.

7. The light source device according to claim 1, wherein: The first light emitting section and the second light emitting section each include at least one of a light emitting diode element and a semiconductor laser element.

8. The light source device according to claim 1, wherein: It also has a rotatable wavelength conversion element, the wavelength conversion element including a wavelength conversion area and a light reflection area, The first light emitting unit emits the first blue light. The second light emitting unit emits the second blue light. The wavelength conversion element receives the first light and the second light in the wavelength conversion region to emit wavelength converted light, and receives the first light and the second light in the light reflection region to emit blue reflected light. As the wavelength conversion element rotates, the wavelength converted light and the blue reflected light are alternately irradiated from the light transmitting member.

9. The light source device according to claim 8, wherein: The first light and the second light are lights of a first wavelength band, The wavelength conversion element receives the first light and the second light to emit light of a second wavelength band different from the first wavelength band. When the period during which the light source device irradiates the light of the first wavelength band without passing through the wavelength conversion element is set to t1, and the period during which the light source device irradiates the light of the second wavelength band from the wavelength conversion element is set to t2, t1 is different from t2. The method comprises a first mode and a second mode, wherein in the first mode, the light of the first wavelength band at t1 and the light of the second wavelength band at t2 are irradiated respectively with at least a portion of the wavelength bands, or at least a portion of the periods of t1 and t2 are combined to irradiate a first output light, and in the second mode, a second output light different from the first output light is irradiated, When set in the first mode, the output of the first light source unit required to obtain the light of the first wavelength band is M1_PLD1, the output of the first light-emitting unit or the second light-emitting unit required to obtain the light of the second wavelength band is set to M1_PLD2, and the ratio of M1_PLD1 to M1_PLD2 is η1. In the second mode, the output of the first light-emitting unit or the second light-emitting unit required to obtain the light of the first wavelength band is M2_PLD1, and the output of the first light-emitting unit or the second light-emitting unit required to obtain the light of the second wavelength band is M2_PLD2. When the ratio of M2_PLD1 to M2_PLD2 is η2, η1 is different from η2.

10. The light source device according to claim 9, wherein: The greater the output of the light in the first wavelength band, the smaller the ratio of the output of the light in the first wavelength band incident on the wavelength conversion element to the output of the light in the second wavelength band emitted by the wavelength conversion element after receiving the light in the first wavelength band.

11. The light source device according to claim 9, wherein: The light amount of the light irradiated by the light source device in the first mode is greater than the light amount of the light irradiated by the light source device in the second mode, and η1<η2 is satisfied.

12. The light source device according to claim 9, wherein: The light source device emits light of a first chromaticity coordinate in the first mode, and emits light of a second chromaticity coordinate in the second mode, The η2 is determined in such a way that the first chromaticity coordinate and the second chromaticity coordinate are consistent.

13. The light source device according to claim 9, wherein: The wavelength conversion element is capable of emitting light in the third wavelength band by receiving light in the second wavelength band. The light source device emits at least light of the first wavelength band and light of the third wavelength band.

14. The light source device according to claim 1, wherein: The device further comprises a first wavelength conversion element and a second wavelength conversion element which include a wavelength conversion region and a light reflection region and are rotatable. The first light emitting unit emits the first blue light. The second light emitting unit emits the second blue light. The first wavelength conversion element receives the first light in the wavelength conversion region to emit wavelength converted light, and receives the first light in the light reflection region to emit blue reflected light. The second wavelength conversion element receives the second light in the wavelength conversion region to emit the wavelength converted light, and receives the second light in the light reflection region to emit blue reflected light. The first wavelength conversion element and the second wavelength conversion element are rotated respectively, so that the wavelength converted light and the blue reflected light are alternately irradiated from the light transmitting member.

15. The light source device according to any one of claims 1 to 4, wherein: The first light source section and the second light source section are alternately lit.

16. The light source device according to any one of claims 1 to 4, wherein: The first light source unit and the second light source unit are simultaneously lit.

17. The light source device according to claim 1, wherein: The direction orthogonal to the central axis of the light-transmitting component is a direction that symmetrically separates direction PL1 and direction PL2, direction PL1 is a direction orthogonal to the central axis 30 of the light-transmitting component 3 and to a line connecting the starting point of the first light directly toward the light-transmitting component and the incident point of the first light entering the light-transmitting component, and direction PL2 is a direction orthogonal to the central axis of the light-transmitting component and to a line connecting the starting point of the second light directly toward the light-transmitting component and the incident point of the second light entering the light-transmitting component.

18. A light source device, comprising: A first light source unit emits a first light from one or more first light emitting units; A second light source unit emits a second light from one or more second light emitting units; A light-transmitting component, capable of transmitting the incident first light and second light; A driving unit, used for individually driving one or more of the first light-emitting units and one or more of the second light-emitting units; as well as A control unit, used to control the action of the driving unit, The light source device irradiates the first light and the second light through the light-transmitting member, the driving unit individually reduces the light amount of the first light emitted from one or more first light-emitting units and the second light emitted from one or more second light-emitting units, or turns off one or more first light-emitting units and one or more second light-emitting units, respectively. When the light-transmitting component is observed from a direction orthogonal to the central axis of the light-transmitting component, the control unit alternately switches, at a predetermined switching cycle, a state in which both the first light and the second light are incident on the light-transmitting component at a positive angle to the central axis of the light-transmitting component and a state in which both the first light and the second light are incident on the light-transmitting component at a negative angle to the central axis.

19. A projection device, comprising: The light source device according to any one of claims 1 to 14; a light modulating unit configured to spatially modulate the light emitted from the light source device; and The projection unit is used for projecting the light modulated by the light modulation unit.

20. A projection device, comprising: The light source device according to claim 6 or 17; a light modulating unit configured to spatially modulate the light emitted from the light source device; and a projection unit, configured to project the light modulated by the light modulation unit, The light modulator generates a projection image in a predetermined frame period, and the length of the switching period is less than or equal to the length of the frame period.

21. A projection device, comprising: The light source device according to claim 5; a light modulating unit configured to spatially modulate the light emitted from the light source device; and a projection unit, configured to project the light modulated by the light modulation unit, Whenever the projection device is started, the driving unit alternately turns off the first light source group and the second light source group, or alternately reduces the light amount of the first light from the first light source group and the light amount of the second light from the second light source group.

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