projector

Abstract

To enhance the utilization efficiency of light.SOLUTION: A projector 100 comprises a green liquid crystal panel 24G having a green incident side substrate 243G. The green incident side substrate 243G includes an incident glass substrate 249G, a common electrode 247, and a plurality of first microlenses 247G formed on the incident glass substrate 249G. Each of the plurality of first microlenses 247G condenses green light LG toward one corresponding pixel electrode 416 among a plurality of pixel electrodes 416. A first angle θ1, which is an angle formed by the green light LG having passed through a green collimating lens 23G with respect to a normal on an incident surface of the green liquid crystal panel 24G, is smaller than a second angle θ2, which is an angle formed by the green light LG having passed through a green reflector 22G and before passing through the green collimating lens 23G with respect to the normal on the incident surface of the green liquid crystal panel 24G.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a projector. [Background technology]

[0002] Conventionally, there has been known a projector that uses a single liquid crystal panel as a light modulation element, a so-called "single-panel projector" (see Patent Document 1). In Patent Document 1, an LED that emits unpolarized light is used as the light source. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] China Utility Model Publication No. 212515320 Summary of the Invention [Problem to be solved by the invention]

[0004] The "single-panel projector" described in Patent Document 1 has a problem in that the light emitted from the light source is used inefficiently, causing the light to be absorbed inside the projector, generating heat and accelerating deterioration of the projector. For example, patent documents use a single LCD panel. In this case, for example, a color filter is used to express R (red), G (green), and B (blue). Color filters generate heat and deteriorate when they absorb light. Therefore, increasing the brightness of the light source accelerates the deterioration of the color filter, shortening the product life of the projector. Therefore, a projector is provided that has a structure that improves light utilization efficiency, suppresses deterioration of components that constitute the interior of the projector even when the brightness of the light source is increased, and extends the product life. [Means for solving the problem]

[0005] One aspect of the present disclosure provides a light source including a first solid-state light source that emits a first light, a second solid-state light source that emits a second light having a wavelength different from that of the first light, a third solid-state light source that emits a third light having a wavelength different from that of the first light and the second light, a projection lens that emits the first light, the second light, and the third light, a first reflector that is disposed in an optical path of the first light between the projection lens and the first solid-state light source, a first collimating lens that is disposed in the optical path of the first light between the projection lens and the first reflector, and a second collimating lens that is disposed in the optical path of the first light between the projection lens and the first collimating lens. and a first liquid crystal panel placed on the projection lens, and a prism placed on an optical path of the first light between the projection lens and the first liquid crystal panel, the first liquid crystal panel including an incident-side substrate into which the first light is incident, an exit-side substrate from which the first light is emitted, and a first liquid crystal layer sandwiched between the incident-side substrate and the exit-side substrate, the exit-side substrate having translucency and including an exit surface from which the first light is emitted, a plurality of scanning electrodes formed on the exit substrate, a plurality of signal electrodes formed on the exit substrate and intersecting each of the plurality of scanning electrodes, and a first liquid crystal layer sandwiched between the incident-side substrate and the exit-side substrate. the incident-side substrate includes a plurality of pixel electrodes formed on the exit substrate and adjacent to one of the intersections at which the plurality of scanning electrodes and the plurality of signal electrodes intersect, and a plurality of transistors formed on the exit substrate and electrically connected to one of the plurality of pixel electrodes and to one of the plurality of signal electrodes, the incident-side substrate having light transmissive properties and an incident surface onto which the first light is incident, and a transistor formed on the incident substrate and disposed so as to face the plurality of pixel electrodes with the liquid crystal layer interposed therebetween, the transistors being configured to apply a voltage to the liquid crystal layer. and a plurality of first microlenses formed on the incident substrate, each of the plurality of first microlenses focusing the first light toward a corresponding one of the plurality of pixel electrodes, and a first angle, which is an angle that the first light that has passed through the first collimating lens makes with a normal to the incident surface of the first liquid crystal panel, is smaller than a second angle, which is an angle that the first light that has passed through the first reflector and before passing through the first collimating lens makes with a normal to the incident surface of the first liquid crystal panel. [Brief explanation of the drawings]

[0006] [Figure 1] FIG. 1 is a diagram showing an example of the configuration of a projector according to the present embodiment. [Figure 2] FIG. 2 is a diagram showing an example of the configuration of a projection unit of a projector. [Figure 3] FIG. 4 is a diagram showing an example of the configuration of a green reflector. [Figure 4] FIG. 10 is a diagram showing the traveling direction of light before and after passing through a green collimating lens. [Figure 5] FIG. 2 is a diagram showing an example of the configuration of a green light source section and a green entrance polarizer. [Figure 6] FIG. 2 is a diagram showing an example of the configuration of an inorganic polarizing plate. [Figure 7] FIG. 10 is a cross-sectional view showing an example of the configuration of a green liquid crystal panel including a microlens. [Figure 8] FIG. 2 is a diagram showing an example of a driver circuit. [Figure 9] FIG. 2 is a diagram showing an example of an arrangement of transistors in a driver circuit. [Figure 10] FIG. 10 is a perspective view showing an example of the configuration of a green reflector. [Figure 11] FIG. 10 is a diagram showing an example of a liquid crystal sealing region in a green liquid crystal panel. DETAILED DESCRIPTION OF THE INVENTION

[0007] Hereinafter, this embodiment will be described with reference to the drawings. First, the configuration of a projector 100 according to this embodiment will be described with reference to Fig. 1. Fig. 1 is a diagram showing an example of the configuration of a projector 100 according to this embodiment.

[0008] As shown in FIG. 1, the projector 100 includes a projection unit 2 and a drive unit 120 that drives the projection unit 2. The projection unit 2 forms an optical image and projects image light PL onto the screen SC. The projection unit 2 projects the image light PL corresponding to the projection image PM onto the screen SC. The projection unit 2 also projects the image light PL so as to form the projection image PM on the screen SC. The projection unit 2 includes a light source unit 2 A, a light modulation device 2 B, and a projection optical system 2 C. The drive unit 120 includes a light source drive unit 121 and a light modulation device drive unit 122.

[0009] The light source unit 2A includes a solid-state light source 211, a reflector 22, and a collimating lens . The solid-state light source 211 is configured, for example, by an LED (Light Emitting Diode). The reflector 22 guides the light emitted from the solid-state light source 211 to the collimating lens 23 . The light emitted from the solid-state light source 211 is incident on the collimating lens 23 via the reflector 22, and the collimating lens 23 makes the light closer to parallel light, and then outputs the light to the liquid crystal panel 24.

[0010] The light source driving unit 121 is connected to the internal bus 107, and controls the output of the solid-state light source 211 by turning it on and off in accordance with instructions from the control unit 150, which is also connected to the internal bus 107.

[0011] The light modulation device 2 B includes a liquid crystal panel 24 and a prism 25 . The liquid crystal panel 24 is a transmissive liquid crystal panel that modulates light passing through it to generate image light PL. The image light PL that has passed through the liquid crystal panel 24 and been modulated is combined by a prism 25 and emitted to the projection optical system 2C.

[0012] The light modulation device 2B is driven by a light modulation device driving section 122. The light modulation device driving section 122 is connected to an image processing section 145. Image data is input to the light modulation device driving unit 122 from the image processing unit 145. The light modulation device driving unit 122 converts the input image data into a data signal suitable for the operation of the liquid crystal panel 24. Based on the converted data signal, the light modulation device driving unit 122 applies a voltage to each pixel of the liquid crystal panel 24, and draws an image on the liquid crystal panel 24.

[0013] The projection optical system 2C includes a projection lens 27 that forms an image of the incident image light PL on the screen SC. The projection optical system 2C also includes a zoom mechanism that enlarges or reduces the image projected onto the screen SC, a focus adjustment mechanism that adjusts the focus, and a lens shift mechanism that adjusts the projection direction of the image light PL. The projection unit 2 will be further described with reference to FIGS.

[0014] The projector 100 further includes an operation unit 131, a remote control receiver 133, an input interface 135, a storage unit 137, a communication interface 141, a frame memory 143, an image processing unit 145, and a control unit 150. The input interface 135, the storage unit 137, the communication interface 141, the image processing unit 145, and the control unit 150 are connected to each other via an internal bus 107 so as to be able to communicate data with each other.

[0015] The operation unit 131 includes various buttons and switches provided on the surface of the housing of the projector 100, generates operation signals corresponding to the operation of these buttons and switches, and outputs the operation signals to the input interface 135. The input interface 135 includes a circuit that outputs the operation signals input from the operation unit 131 to the control unit 150.

[0016] The remote control light receiving unit 133 receives an infrared signal transmitted from the remote control 5, decodes the received infrared signal, and generates an operation signal. The remote control light receiving unit 133 outputs the generated operation signal to the input interface 135. The input interface 135 includes a circuit that outputs the operation signal input from the remote control light receiving unit 133 to the control unit 150.

[0017] The storage unit 137 is, for example, a magnetic recording device such as an HDD (Hard Disk Drive), or a storage device using a semiconductor storage element such as a flash memory or an SSD (Solid State Drive). The storage unit 137 stores programs executed by the control unit 150, data processed by the control unit 150, image data, etc.

[0018] The communication interface 141 is a communication interface that performs communication with the personal computer 200 in accordance with, for example, the USB (registered trademark) (Universal Serial Bus) standard. The communication interface 141 includes a connector for connecting a USB (registered trademark) cable and an interface circuit that processes signals transmitted through the connector. The communication interface 141 receives, for example, image data from the personal computer 200. The image data corresponds to the projection image PM that the projection unit 2 projects onto the screen SC.

[0019] The control unit 150 controls each unit of the projector 100. The control unit 150 includes a processor 150A and a memory 150B. The memory 150B stores a control program. The processor 150A controls each unit of the projector 100 by reading and executing the control program from the memory 150B. The memory 150B is a storage device that stores programs and data executed by the processor 150A in a non-volatile manner.

[0020] The processor 150A may be configured as a single processor, or may be configured such that multiple processors function as the processor 150A.

[0021] The image processing unit 145 and the frame memory 143 can be configured, for example, by an integrated circuit. The integrated circuit includes a large-scale integration (LSI), an application specific integrated circuit (ASIC), and a programmable logic device (PLD). The PLD includes, for example, a field-programmable gate array (FPGA).

[0022] The image processing unit 145 loads image data corresponding to the projection image PM into the frame memory 143. The frame memory 143 includes a plurality of banks. Each bank has a storage capacity sufficient to store one frame's worth of image data. The frame memory 143 is configured, for example, by an SDRAM (Synchronous Dynamic Random Access Memory).

[0023] The image processing unit 145 performs image processing on the image data expanded in the frame memory 143, such as resolution conversion processing, resizing processing, distortion correction, shape correction processing, digital zoom processing, and adjustment of the color tone and brightness of the image.

[0024] Next, the configuration of the projection unit 2 of the projector 100 will be described with reference to Fig. 2. Fig. 2 is a diagram showing an example of the configuration of the projection unit 2 of the projector 100. FIG. 2 shows the X-axis, Y-axis, and Z-axis. The X-axis, Y-axis, and Z-axis are perpendicular to each other. The X-axis and Y-axis are parallel to the horizontal direction. The Z-axis is parallel to the vertical direction. The X-axis is parallel to the left-right direction, with the positive direction of the X-axis indicating the right direction and the negative direction of the X-axis indicating the left direction. The Y-axis is parallel to the front-to-back direction, with the positive direction of the Y-axis indicating the forward direction and the negative direction of the Y-axis indicating the backward direction. The positive direction of the Z-axis indicates the upward direction and the negative direction of the Z-axis indicates the downward direction. The X-axis, Y-axis, and Z-axis shown in FIG. 2 are also shown in FIGS. 3 to 7 and 10 to 11, respectively.

[0025] As shown in FIG. 2, the projector 100 is a projector that includes three liquid crystal panels 24 as the light modulation device 2B, and is a so-called "three-panel projector." First, the main configuration and optical path of the projection unit 2 will be described. The projector 100 includes a light source unit 2A, a liquid crystal panel 24, a prism 25, and a projection optical system 2C including a projection lens 27. The liquid crystal panel 24 has an entrance polarizer 241 and an exit polarizer 242 arranged thereon.

[0026] The light source section 2A includes a red light source section 21R, a green light source section 21G, and a blue light source section 21B. Red light source unit 21R is disposed to the right of prism 25, i.e., in the positive direction of the X axis. Green light source unit 21G is disposed to the rear of prism 25, i.e., in the negative direction of the Y axis. Blue light source unit 21B is disposed to the left of prism 25, i.e., in the negative direction of the X axis. The liquid crystal panel 24 includes a red liquid crystal panel 24R, a green liquid crystal panel 24G, and a blue liquid crystal panel 24B.

[0027] The red liquid crystal panel 24R is disposed between the red light source unit 21R and the prism 25. Red light LR is emitted from the red light source unit 21R to the left, i.e., in the negative direction of the X axis, and enters the red liquid crystal panel 24R. The red liquid crystal panel 24R modulates the red light LR incident from the red light source unit 21R with the red component of the image data to generate red image light IR. The red liquid crystal panel 24R then emits the red image light IR to the left, i.e., in the negative direction of the X axis, toward the prism 25.

[0028] The green liquid crystal panel 24G is disposed between the green light source unit 21G and the prism 25. The green light LG is emitted from the green light source unit 21G in the forward direction, i.e., in the positive direction of the Y axis, and is incident on the green liquid crystal panel 24G. The green liquid crystal panel 24G modulates the green light LG incident from the green light source unit 21G with the green component of the image data to generate green image light IG. The green liquid crystal panel 24G then emits the green image light IG toward the prism 25 in the forward direction, i.e., in the positive direction of the Y axis.

[0029] Blue liquid crystal panel 24B is disposed between blue light source unit 21B and prism 25. Blue light LB is emitted from blue light source unit 21B to the right, i.e., in the positive direction of the X axis, and enters blue liquid crystal panel 24B. Blue liquid crystal panel 24B modulates blue light LB with the blue component of the image data to generate blue image light IB. Blue liquid crystal panel 24B then emits blue image light IB to the right, i.e., in the positive direction of the X axis, toward prism 25.

[0030] The prism 25 combines the red image light IR from the red liquid crystal panel 24R, the green image light IG from the green liquid crystal panel 24G, and the blue image light IB from the blue liquid crystal panel 24B, and emits full-color image light IM in the forward direction.

[0031] The prism 25 has an entrance surface 254 , an entrance surface 255 , an entrance surface 256 , a reflective film 251 , a reflective film 252 , and an exit surface 253 . The incident surface 254 faces the blue liquid crystal panel 24B. Blue image light IB is incident on the incident surface 254 from the blue liquid crystal panel 24B. The incident surface 255 faces the green liquid crystal panel 24G. Green image light IG is incident on the incident surface 255 from the green liquid crystal panel 24G. The incident surface 256 faces the red liquid crystal panel 24R. Red image light IR is incident on the incident surface 256 from the red liquid crystal panel 24R.

[0032] The reflective film 251 transmits the blue image light IB and the green image light IG and reflects the red image light IR. The reflective film 252 transmits the red image light IR and the green image light IG and reflects the blue image light IB.

[0033] The blue image light IB enters the prism 25 from the incident surface 254 in the right direction, i.e., in the positive direction of the X axis. The blue image light IB then passes through the reflective film 251 and is reflected by the reflective film 252. The blue image light IB reflected by the reflective film 252 exits from the exit surface 253 in the forward direction, i.e., in the positive direction of the Y axis. The green image light IG enters the prism 25 in the forward direction, i.e., in the positive direction of the Y axis, from the incident surface 255. The green image light IG then passes through the reflective films 251 and 252 and exits from the exit surface 253 in the forward direction, i.e., in the positive direction of the Y axis. The red image light IR enters the prism 25 from the incident surface 256 in a leftward direction, i.e., in the negative direction of the X axis. The red image light IR then passes through the reflective film 252 and is reflected by the reflective film 251. The red image light IR reflected by the reflective film 251 exits from the exit surface 253 in a forward direction, i.e., in the positive direction of the Y axis. In this way, the prism 25 combines the blue image light IB, the green image light IG, and the red image light IR, and emits full-color image light IM forward, that is, in the positive direction of the Y axis.

[0034] The light source unit 2A includes a solid-state light source 211, a reflector 22, and a collimating lens . The red light source unit 21R has a red solid-state light source 211R, a red reflector 22R, and a red collimating lens 23R. The green light source unit 21G has a green solid-state light source 211G, a green reflector 22G, and a green collimating lens 23G. The blue light source unit 21B has a blue solid-state light source 211B, a blue reflector 22B, and a blue collimating lens 23B. The solid-state light source 211 includes a red solid-state light source 211R, a green solid-state light source 211G, and a blue solid-state light source 211B. The red solid-state light source 211R emits red light LR. The green solid-state light source 211G emits green light LG. The blue solid-state light source 211B emits blue light LB. The reflector 22 includes a red reflector 22R, a green reflector 22G, and a blue reflector 22B. The collimating lens 23 includes a red collimating lens 23R, a green collimating lens 23G, and a blue collimating lens 23B.

[0035] One of the red light LR, green light LG, and blue light LB corresponds to an example of a "first light." One of the other two lights of the red light LR, green light LG, and blue light LB corresponds to an example of a "second light." Furthermore, the other of the other two lights of the red light LR, green light LG, and blue light LB corresponds to an example of a "third light." In this embodiment, for example, a case will be described in which green light LG corresponds to an example of "first light", blue light LB corresponds to an example of "second light", and red light LR corresponds to an example of "third light".

[0036] Moreover, each of the green image light IG and the image light IM corresponds to an example of the "first light." Moreover, each of the blue image light IB and the image light IM corresponds to an example of the "second light." Moreover, each of the red image light IR and the image light IM corresponds to an example of the "third light." In other words, in this embodiment, the "first light" corresponds to the green light LG, the green image light IG, and the image light IM, the "second light" corresponds to the blue light LB, the blue image light IB, and the image light IM, and the "third light" corresponds to the red light LR, the red image light IR, and the image light IM.

[0037] In this embodiment, for example, green solid-state light source 211G corresponds to an example of a "first solid-state light source." Furthermore, blue solid-state light source 211B corresponds to an example of a "second solid-state light source." Furthermore, red solid-state light source 211R corresponds to an example of a "third solid-state light source."

[0038] In this embodiment, for example, the "optical path of the first light" includes the optical path of the green light LG, the optical path of the green image light IG, and the optical path of the image light IM. Furthermore, for example, the "optical path of the second light" includes the optical path of the red light LR, the optical path of the red image light IR, and the optical path of the image light IM. Furthermore, for example, the "optical path of the third light" includes the optical path of the blue light LB, the optical path of the blue image light IB, and the optical path of the image light IM.

[0039] In this embodiment, for example, the green reflector 22G corresponds to an example of a "first reflector," the blue reflector 22B corresponds to an example of a "second reflector," and the red reflector 22R corresponds to an example of a "third reflector." In addition, in this embodiment, the green parallelizing lens 23G corresponds to an example of a "first parallelizing lens," the blue parallelizing lens 23B corresponds to an example of a "second parallelizing lens," and the red parallelizing lens 23R corresponds to an example of a "third parallelizing lens."

[0040] In this embodiment, for example, the green liquid crystal panel 24G corresponds to an example of a "first liquid crystal panel," the blue liquid crystal panel 24B corresponds to an example of a "second liquid crystal panel," and the red liquid crystal panel 24R corresponds to an example of a "third liquid crystal panel."

[0041] Green liquid crystal panel 24G is provided with green entrance polarizer 241G and green exit polarizer 242G. Red liquid crystal panel 24R is provided with red entrance polarizer 241R and red exit polarizer 242R. Blue liquid crystal panel 24B is provided with blue entrance polarizer 241B and blue exit polarizer 242B. In this embodiment, for example, the green incident polarizer 241G corresponds to an example of a "first polarizer," the blue incident polarizer 241B corresponds to an example of a "second polarizer," and the red incident polarizer 241R corresponds to an example of a "third polarizer."

[0042] Since the red light source unit 21R, the green light source unit 21G, and the blue light source unit 21B each have approximately the same configuration, the following explanation will mainly focus on the green light source unit 21G, and the explanation of the configurations of the red light source unit 21R and the blue light source unit 21B will be omitted. Since the green incident polarizer 241G, the red incident polarizer 241R, and the blue incident polarizer 241B each have approximately the same configuration, the following explanation will mainly focus on the green incident polarizer 241G, and the configurations of the red incident polarizer 241R and the blue incident polarizer 241B will not be explained. Since the green output polarizer 242G, the red output polarizer 242R, and the blue output polarizer 242B each have approximately the same configuration, the following explanation will mainly focus on the green output polarizer 242G, and the configurations of the red output polarizer 242R and the blue output polarizer 242B will not be explained.

[0043] Green light source section 21G has green solid-state light source 211G, green reflector 22G, and green collimating lens 23G. Green solid-state light source 211G emits green light LG forward, i.e., in the positive direction of the Y axis. Green solid-state light source 211G is configured with, for example, an LED (Light Emitting Diode). Green solid-state light source 211G may be configured with one LED or multiple LEDs. When green solid-state light source 211G is configured with multiple LEDs, the multiple LEDs are arranged along an XZ plane including the X axis and the Z axis. In this embodiment, a case will be described in which green light source section 21G is configured with an LED, but green light source section 21G may also be configured with an LD (Laser Diode).

[0044] The green light LG has a wavelength of, for example, 500 nm to 600 nm. The blue light LB has a wavelength of, for example, 420 nm to 500 nm, and the red light LR has a wavelength of, for example, 610 nm to 700 nm.

[0045] Green solid-state light source 211G is supported by substrate 213G. Substrate 213G is disposed parallel to the XZ plane including the X-axis and Z-axis. Green solid-state light source 211G is fixed to the surface of substrate 213G facing the positive direction of the Y-axis. Substrate 213G is made of, for example, a metal rectangular plate. Heat is transferred from green solid-state light source 211G to substrate 213G. Substrate 213G dissipates the heat transferred from green solid-state light source 211G into the space around substrate 213G. In other words, substrate 213G acts as a heat dissipation member. The substrate 213G corresponds to an example of a "base."

[0046] Green reflector 22G is disposed in the optical path of green light LG between projection lens 27 and green solid-state light source 211G. Green reflector 22G is disposed, for example, adjacent to green solid-state light source 211G and in front of green solid-state light source 211G, i.e., in the positive direction of the Y axis. The green reflector 22G is formed in the shape of a hollow rectangular truncated cone. Green reflector 22G has an incident end 221G, an exit end 222G, a side member 223G, and a reflecting member 224G.

[0047] Incident end 221G is the end of green reflector 22G facing rearward, i.e., in the negative direction of the Y axis. Incident end 221G is formed in a substantially rectangular shape. Green light LG emitted from green solid-state light source 211G is incident on incident end 221G. Exit end 222G is the end of green reflector 22G facing forward, i.e., in the positive direction of the Y axis. Exit end 222G is formed in a substantially rectangular shape. Green light LG emitted from green solid-state light source 211G is emitted from exit end 222G to green collimating lens 23G. Exit end 222G is in contact with, for example, the surface of green collimating lens 23G facing backward, i.e., in the negative direction of the Y axis.

[0048] The side surface member 223G is made of a transparent material such as optical glass, etc. The side surface member 223G is made up of four plate-shaped members. The reflecting member 224G is made of, for example, a material such as a dielectric multilayer film. The reflecting member 224G is attached to the inner surface of the side surface member 223G. The reflecting member 224G reflects the green light LG.

[0049] Green reflector 22G is disposed so that a central axis LN of green reflector 22G, which is parallel to the front-rear direction, i.e., the Y-axis direction, is perpendicular to the light-emitting surface of green solid-state light source 211G. Central axis LN is shown in FIGS. 3 and 4. In green reflector 22G, the area surrounded by incident end 221G, exit end 222G, and reflecting member 224G is the area through which green light LG propagates. As the green light LG propagates through the above-described region from incident end 221G toward exit end 222G, the green light LG is shaped into a rectangular shape. As a result, the green light LG incident on green collimating lens 23G from exit end 222G is shaped to have approximately uniform brightness on the rectangular shape of the inner surface of exit end 222G.

[0050] Here, the green reflector 22G and the green collimating lens 23G will be further described with reference to Fig. 3. Fig. 3 is a diagram showing an example of the configuration of the green reflector 22G. Green reflector 22G is formed, for example, in the shape of a hollow rectangular truncated cone. In this case, incident end 221G and exit end 222G are formed in a rectangular shape. In this case, the angle α formed by side member 223G and reflective member 224G corresponding to the short sides of the rectangle with respect to central axis LN and imaginary axis VX of green reflector 22G, i.e., the taper angle, is preferably within a range of 7° to 22°. Note that in FIG. 3, central axis LN is indicated by a two-dot chain line. Imaginary axis VX is an axis parallel to central axis LN. The angle β formed by side member 223G and reflecting member 224G corresponding to the long sides of the rectangle with respect to central axis LN of green reflector 22G, ie, the taper angle, is preferably within a range of 14° to 36°. The above-mentioned preferable ranges of the angles α and β have been confirmed by the configuration of the green reflector 22G and numerical simulations based on ray tracing.

[0051] As shown in Figure 3, a portion of the green light LG incident on the green reflector 22G, a ray Lg1, forms an angle with respect to the virtual axis VX that is smaller than the angle α and the angle β, and propagates directly from the incident end 221G to the output end 222G without ever entering the reflecting member 224G. The remaining light ray Lg2 of the green light LG that entered the green reflector 22G forms an angle with respect to the virtual axis VX that is greater than the angle α and the angle β, and enters the reflecting member 224G from the incident end 221G once. In this case, the green light LG reaches the exit end 222G after being reflected by the reflecting member 224G. If the remaining light rays of the green light LG that entered the green reflector 22G form an angle with respect to the virtual axis VX larger than that of the light ray Lg2, the green light LG enters the reflecting member 224G from the incident end 221G two or more times. In this case, the green light LG reaches the exit end 222G after being reflected by the reflecting member 224G two or more times.

[0052] The path of the green light LG within the region surrounded by the incident end 221G, the exit end 222G, and the reflecting member 224G varies depending on the angle it forms with the central axis LN, and the number of reflections by the reflecting member 224G may differ. In this way, the luminance distribution of the green light LG is homogenized within the XZ plane including the X-axis and Z-axis directions by propagating through the area surrounded by the incident end 221G, the exit end 222G, and the reflecting member 224G. That is, the green reflector 22G homogenizes the luminance distribution of the incident green light LG within the XZ plane including the X-axis and Z-axis directions. The green light LG with its homogenized luminance distribution is emitted forward from the exit end 222G, i.e., in the positive direction of the Y axis.

[0053] 3, the resultant vector VG is indicated by a dashed line. The resultant vector VG is generated by combining the vector representing the light ray Lg1 and the vector representing the light ray Lg2. The position of the intersection between the resultant vector VG and the central axis LN of the green reflector 22G and the green collimating lens 23G coincides with the position of the focal point F2 of the green collimating lens 23G. The green reflector 22G is further described with reference to FIG.

[0054] A focal length f2 of green collimating lens 23G is longer than a distance g2 between incident end 221G and exit end 222G of green reflector 22G. Distance g2 corresponds to the length of green reflector 22G in the Y-axis direction. It is more preferable that focal length f2 be 1.1 times or more and 2.0 times or less than distance g2. By setting focal length f2 within this range, green light LG emitted from green solid-state light source 211G is efficiently collimated, improving the utilization efficiency of green light LG. The above-described preferable range of focal length f2 has been confirmed by the configuration of green light source unit 21G and a numerical simulation based on ray tracing.

[0055] Returning to FIG. 2, the configuration of the projection unit 2 will be described. Green collimating lens 23G is disposed in the optical path of green light LG between projection lens 27 and green reflector 22G. Green collimating lens 23G is disposed, for example, in the forward direction of emission end 222G of green reflector 22G, i.e., in the positive direction of the Y axis. Green collimating lens 23G also collimates green light LG emitted from green reflector 22G in the forward direction, i.e., along the positive direction of the Y axis.

[0056] Green collimating lens 23G is, for example, a plano-convex lens having an entrance surface and an exit surface. The entrance surface is formed, for example, on a plane parallel to the XZ plane perpendicular to the forward direction, i.e., the positive direction of the Y axis. The exit surface is formed of a convex curved surface that protrudes forward, i.e., in the positive direction of the Y axis. Furthermore, the area of ​​the incident surface of green collimating lens 23G onto which green light LG is incident from green reflector 22G is equal to the area of ​​the exit surface of green collimating lens 23G onto which green light LG is emitted.

[0057] The incident surface of green collimating lens 23G is arranged, for example, to be in contact with exit end 222G of green reflector 22G. By arranging green collimating lens 23G in this manner, green light LG emitted from exit end 222G of green reflector 22G is efficiently incident on green collimating lens 23G. Therefore, loss of green light LG can be suppressed.

[0058] In this embodiment, a case will be described in which green collimating lens 23G is a plano-convex lens, but green collimating lens 23G may be another optical lens, for example, a Fresnel lens. Furthermore, in this embodiment, the case where green collimating lens 23G is in contact with emission end 222G of green reflector 22G is described, but green collimating lens 23G may be disposed away from emission end 222G of green reflector 22G.

[0059] Next, green collimating lens 23G will be further described with reference to Fig. 4. Fig. 4 is a diagram showing the traveling direction of light before and after passing through green collimating lens 23G. As shown in FIG. 4, the first angle θ1 is smaller than the second angle θ2. The first angle θ1 is the angle that the green light LG that has passed through the green collimating lens 23G makes with the normal to the incident surface of the green liquid crystal panel 24G. The normal to the incident surface of the green liquid crystal panel 24G is parallel to the central axis LN. In other words, the first angle θ1 is the angle that the green light LG that has passed through the green collimating lens 23G makes with the central axis LN. The first angle θ1 is approximately zero degrees.

[0060] The second angle θ2 is the angle that the green light LG, which has passed through the green reflector 22G and before passing through the green collimating lens 23G, makes with the normal to the incident surface of the green liquid crystal panel 24G. The normal to the incident surface of the green liquid crystal panel 24G is parallel to the central axis LN. In other words, the second angle θ2 is the angle that the green light LG, which has passed through the green reflector 22G and before passing through the green collimating lens 23G, makes with the central axis LN. In Figure 4, an example of the direction of travel of green light LG that has passed through the green parallelizing lens 23G is shown by a solid vector, and an example of the direction of travel of green light LG that has passed through the green reflector 22G and before passing through the green parallelizing lens 23G is shown by a dashed vector. In this way, the green parallelizing lens 23G can make the angle of incidence on the incident surface of the green liquid crystal panel 24G closer to 90 degrees, thereby suppressing the diffusion of the green light LG and increasing the utilization efficiency of the green light LG.

[0061] Returning to FIG. 2, the configuration of the projection unit 2 will be described. The green entrance polarizer 241G is disposed in the optical path of the green light LG between the projection lens 27 and the green collimating lens 23G. The green entrance polarizer 241G is disposed, for example, between the green collimating lens 23G and the green liquid crystal panel 24G. The green entrance polarizer 241G is disposed, for example, rearward of the green liquid crystal panel 24G, i.e., in the negative direction of the Y axis, so as to be in contact with the green liquid crystal panel 24G. In this embodiment, the green entrance polarizer 241G is disposed so as to be in contact with the green liquid crystal panel 24G, but the green entrance polarizer 241G may be disposed so as to be spaced apart from the green liquid crystal panel 24G.

[0062] Next, another embodiment of green solid-state light source 211G and green entrance polarizer 241G will be described with reference to FIG. First, another embodiment of green solid-state light source 211G will be described. As shown in Fig. 5, green solid-state light source 211G includes green solid-state light source body 214G and green phosphor 212G. Green solid-state light source body 214G is configured with an LED that emits green light LG. Green phosphor 212G is disposed in the front direction of substrate 213G, i.e., on plate surface 213G1 in the positive direction of the Y axis. The green phosphor 212G is stacked on the light emitting surface 214G1 in the forward direction of the green solid-state light source body 214G, i.e., in the positive direction of the Y axis. The green phosphor 212G is excited by the green light LG emitted from the green solid-state light source body 214G as excitation light, and emits the green light LG from the emission surface 212G1. The type and material of the green solid-state light source body 214G and the type and material of the green phosphor 212G are selected so that the wavelength of the green light LG emitted from the green phosphor 212G is, for example, 500 nm to 600 nm.

[0063] 2 to 4, green solid-state light source body 214G may be configured with one LED or multiple LEDs. When green solid-state light source body 214G is configured with multiple LEDs, the multiple LEDs are arranged along the XZ plane.

[0064] Green entrance polarizer 241G outputs predetermined polarized light of green light LG output from green collimating lens 23G forward, that is, in the positive direction of the Y axis. The predetermined polarized light is, for example, S-polarized light. Furthermore, green incident polarizer 241G is formed in a plate shape and is arranged parallel to the XZ plane. Green incident polarizer 241G is, for example, a reflective polarizer. That is, green incident polarizer 241G, for example, emits S-polarized light of green light LG incident from green collimating lens 23G forward, i.e., in the positive direction of the Y axis, and reflects P-polarized light of green light LG backward, i.e., in the negative direction of the Y axis. Green entrance polarizer 241G is, for example, an inorganic polarizer. The inorganic polarizer will be further described with reference to FIG.

[0065] The green light LG emitted from green solid-state light source 211G is randomly polarized light including P-polarized light and S-polarized light. In the following description, the P-polarized light contained in the green light LG emitted from green solid-state light source 211G will be referred to as green P-polarized light LGP, and the S-polarized light contained in the green light LG emitted from green solid-state light source 211G will be referred to as green S-polarized light LGS. 5, the green P-polarized light LGP and the green S-polarized light LGS pass through the green reflector 22G, thereby homogenizing the luminance distribution in the XZ plane. The green P-polarized light LGP and the green S-polarized light LGS that have passed through the green reflector 22G then enter the green collimating lens 23G and are collimated by the green collimating lens 23G. The collimated green P-polarized light LGP and the green S-polarized light LGS then enter the green entrance polarizer 241G. Green S-polarized light LGS passes through green entrance polarizer 241G and exits in the forward direction, i.e., the positive direction of the Y axis. Green P-polarized light LGP is reflected by entrance surface 241G1 of green entrance polarizer 241G, and the reflected light exits in the backward direction, i.e., the negative direction of the Y axis.

[0066] The green P-polarized light LGP reflected by the green entrance polarizer 241G travels backward, i.e., in the negative direction of the Y axis, passes through the green collimating lens 23G and the green reflector 22G, and is incident on the green phosphor 212G. The green phosphor 212G is re-excited by the green P-polarized light LGP reflected by the green entrance polarizer 241G, and emits green light LG containing the green P-polarized light LGP and the green S-polarized light LGS from the exit surface 212G1 again in the forward direction, i.e., in the positive direction of the Y axis. Because green entrance polarizer 241G is configured as a reflective polarizer, the polarized light of green light LG that does not pass through green entrance polarizer 241G is incident on green phosphor 212G and contributes to excitation and light emission of green phosphor 212G, thereby improving the utilization efficiency of green light LG in green light source unit 21G.

[0067] Next, the inorganic polarizer 3 will be described with reference to FIG. Fig. 6 is a diagram showing an example of the configuration of an inorganic polarizing plate 3. As shown in Fig. 6, the inorganic polarizing plate 3 includes a base 31 and a plurality of linear structures 30. The base 31 is formed of a light-transmitting material such as glass in the shape of a rectangular plate. The base 31 is disposed parallel to the XZ plane. The base 31 supports the plurality of linear structures 30. The plurality of linear structures 30 are formed on the rear surface of the substrate 31, i.e., on the surface in the negative direction of the Y axis. The plurality of linear structures 30 have a length longer than the wavelength of the green light LG and are arranged generally parallel to one another at a period P shorter than half the wavelength of the green light LG. The plurality of linear structures 30 are made of an inorganic material. Each of the plurality of linear structures 30 is formed by stacking, for example, a first layer 301, a second layer 302, a third layer 303, and a fourth layer 304. The first layer 301 is made of, for example, aluminum. The second layer 302 is made of, for example, silicon dioxide. The third layer 303 is made of, for example, a dielectric material such as alumina oxide, silicon nitride, or titanium nitride. The fourth layer 304 is made of, for example, silicon dioxide. The inorganic polarizing plate 3 has superior heat resistance compared to an organic polarizing plate made by stretching an organic material such as PVA (polyvinyl alcohol) to align the molecular orientation and then bonding iodine to it, and therefore can increase the brightness of the light source.

[0068] Returning to FIG. 2 again, the configuration of the projection unit 2 will be described. Green liquid crystal panel 24G is disposed in the optical path of green light LG between projection lens 27 and green collimating lens 23G. Green liquid crystal panel 24G is disposed, for example, between green collimating lens 23G and prism 25. Green liquid crystal panel 24G is also disposed in front of green entrance polarizer 241G, i.e., in the positive direction of the Y axis. The green liquid crystal panel 24G receives S-polarized light of the green light LG from the green entrance polarizer 241G. The green liquid crystal panel 24G modulates the incident green light LG in accordance with image data to generate green image light IG. The green liquid crystal panel 24G then emits the green image light IG.

[0069] The green output polarizer 242G is disposed in the optical path of the green light LG between the green liquid crystal panel 24G and the prism 25. The green output polarizer 242G is disposed, for example, in the forward direction, i.e., in the positive direction of the Y axis, with respect to the green liquid crystal panel 24G. The green output polarizer 242G is formed in a flat plate shape. The green output polarizer 242G is disposed parallel to the XZ plane. The green output polarizer 242G outputs a predetermined polarized light of the green image light IG incident from the green liquid crystal panel 24G in the forward direction, i.e., the positive direction of the Y axis. The predetermined polarized light is, for example, P-polarized light. The green output polarizer 242G is a reflective polarizer or an absorptive polarizer. When it is desired to suppress the return light and stray light to the green liquid crystal panel 24G, it is preferable to employ an absorption type polarizer as the green output polarizer 242G. The green exit polarizer 242G emits the P-polarized light of the green image light IG incident from the green liquid crystal panel 24G in the forward direction, i.e., in the positive direction of the Y axis, and reflects the other part of the green image light IG in the backward direction, i.e., in the negative direction of the Y axis.

[0070] Next, the configuration of green liquid crystal panel 24G including the first microlenses will be described with reference to Fig. 7. Fig. 7 is a cross-sectional view showing an example of the configuration of green liquid crystal panel 24G including the first microlenses. Fig. 7 is a cross-sectional view showing a cross section parallel to the XY plane of green liquid crystal panel 24G. 7, green liquid crystal panel 24G includes green incident-side substrate 243G, green exit-side substrate 244G, and green liquid crystal layer 245G. Green liquid crystal layer 245G is composed of liquid crystal sealed in the gap between green incident-side substrate 243G and green exit-side substrate 244G.

[0071] The green emission-side substrate 244G includes an emission glass substrate 248G and a drive circuit 4. The emission glass substrate 248G supports the drive circuit 4. The drive circuit 4 that drives the liquid crystal of the green liquid crystal layer 245G is formed on the surface of the green emission-side substrate 244G that contacts the green liquid crystal layer 245G, in other words, on the rear surface. The drive circuit 4 has scanning electrodes 411, signal electrodes 413, pixel electrodes 416, and transistors 414. The drive circuit 4 is further described with reference to FIG.

[0072] The green incident-side substrate 243G has a common electrode 417, a first microlens array 246G, and an incident glass substrate 249G. The incident glass substrate 249G supports the common electrode 417 and the first microlens array 246G. The common electrode 417 is formed of a transparent electrode film. The common electrode 417 is disposed on the surface of the green incident-side substrate 243G that contacts the green liquid crystal layer 245G, in other words, the surface facing forward, so as to face the pixel electrodes 416. The first microlens array 246G is disposed on the green light incident-side substrate 243G in the rear direction, i.e., in the negative direction of the Y axis, with respect to the common electrode 417. A plurality of first microlenses 247G are arranged in the first microlens array 246G. Each of the plurality of first microlenses 247G focuses the green light LG toward a corresponding one of the plurality of pixel electrodes 416. The green incident side substrate 243G and the green exit side substrate 244G correspond to an example of a "maximum area." The first microlens 247G corresponds to an example of a "first microlens."

[0073] The green light LG incident on the green incident side substrate 243G is concentrated by the first microlens array 246G toward the pixel electrode 416, and the green image light IG is generated by the green liquid crystal layer 245G, and the green image light IG is emitted from the green exit side substrate 244G.

[0074] 7 illustrates a case where the driving circuit 4 is formed on the output glass substrate 248G and the common electrode 417 is formed on the input glass substrate 249G, but the driving circuit 4 may be formed on the input glass substrate 249G and the common electrode 417 may be formed on the output glass substrate 248G. The driving circuit 4 includes a scanning electrode 411, a signal electrode 413, a pixel electrode 416, and a transistor 414.

[0075] 7 illustrates a case where the first microlens 247G is arranged on the green incident side substrate 243G, but the first microlens 247G may be arranged on the green incident side substrate 243G and the second microlens may be arranged on the green output side substrate 244G. The second microlens, for example, diffuses the green light LG collected by the first microlens 247G.

[0076] Next, the drive circuit 4 will be described with reference to Fig. 8. Fig. 8 is a diagram showing an example of the drive circuit 4. As shown in Fig. 8, the drive circuit 4 includes an internal drive circuit 40, a scanning line drive circuit 43, and a data line drive circuit 44. The internal drive circuit 40 includes an image display circuit 41 and a sampling circuit 42 . The image display circuit 41 includes a scanning electrode 411 , a signal electrode 413 , a pixel electrode 416 , a transistor 414 , and a storage capacitor 415 .

[0077] The scanning line driving circuit 43 applies scanning signals Gi (i=1, 2, . . . , m) to the scanning electrodes 411 in this order at a predetermined timing. The data line driving circuit 44 sequentially generates sampling signals Si (i=1, 2, . . . , n) and outputs them to the sampling circuit 42. The sampling circuit 42 samples the image signal VID for each signal electrode 413 in response to a sampling signal Si, and applies data signals Di (i=1, 2, . . . , n) to the plurality of signal electrodes 413 .

[0078] The transistor 414 is, for example, a TFT (Thin Film Transistor). A scanning electrode 411 is connected to a gate of the transistor 414. A signal electrode 413 is connected to a source of the transistor 414. A pixel electrode 416 is connected to a drain of the transistor 414.

[0079] A predetermined voltage is applied to the gate of the transistor 414 from the scanning electrode 411, turning the transistor 414 ON for a certain period of time, thereby writing the data signal Di supplied from the signal electrode 413 to the pixel electrode 416 at a predetermined timing. The storage capacitor 415 prevents the data signal Di written to the pixel electrode 416 from leaking.

[0080] The liquid crystal of the green liquid crystal layer 245G modulates the green light LG by changing the orientation and order of molecular aggregation depending on the voltage level applied to the pixel electrode 416, thereby generating green image light IG. For example, in the normally white mode, the transmittance for green light LG decreases according to the voltage applied to the pixel electrode 416. On the other hand, in the normally black mode, the transmittance for incident light increases according to the voltage applied to the pixel electrode 416.

[0081] Next, the arrangement of the transistors 414 will be described with reference to Fig. 9. Fig. 9 is a diagram showing an example of the arrangement of the transistors 414 in the drive circuit 4. The transistor 414 is formed on a semiconductor film 414F. The semiconductor film 414F is formed on the signal electrode 413. On the semiconductor film 414F, a gate of the transistor 414 is formed at a position where the scanning electrode 411 and the signal electrode 413 intersect.

[0082] A source 414S of the transistor 414 is connected to the signal electrode 413 via a contact hole CHS. A drain 414D of the transistor 414 is connected to a connecting electrode CF via a contact hole CHD. The connecting electrode CF is an electrode that connects the drain 414D of the transistor 414 and the pixel electrode 416. The pixel electrode 416 is connected to the connecting electrode CF via a contact hole CHP.

[0083] According to this structure, as shown in FIG. 9, when the green liquid crystal panel 24G is viewed in a plane from the normal direction, the semiconductor film 414F is formed on the signal electrode 413, thereby reducing the structure that blocks the green light LG incident on the pixel electrode 416 of the green liquid crystal panel 24G. Furthermore, the gate of the transistor 414 is formed at a position where the scanning electrode 411 intersects with the signal electrode 413. Therefore, the gate of the transistor 414 and the scanning electrode 411 can be connected with a simple configuration.

[0084] Next, the configuration of the green reflector 22G will be described with reference to Fig. 10. Fig. 10 is a perspective view showing an example of the configuration of the green reflector 22G. 10, green reflector 22G is formed, for example, in the shape of a rectangular frustum. In other words, incident end 221G and exit end 222G are each formed in a rectangular shape.

[0085] Side member 223G of green reflector 22G is composed of four plate-shaped members. Each of the four plate-shaped members is formed in a trapezoidal shape. The shorter of the base sides of each of the four plate-shaped members forms part of incident end 221G. The longer of the base sides of each of the four plate-shaped members forms part of exit end 222G.

[0086] The long sides of incident end 221G and emitting end 222G are parallel to the X-axis. The short sides of incident end 221G and emitting end 222G are parallel to the Z-axis. The ratio between the length W2 of the long side of incident end 221G and the length H2 of the short side of incident end 221G is the same as the ratio between the length W3 of the long side of emitting end 222G and the length H3 of the short side of emitting end 222G. In other words, the aspect ratio of the rectangle corresponding to incident end 221G matches the aspect ratio of the rectangle corresponding to output end 222G. That is, green reflector 22G is configured so that the following formula (1) holds. W2:H2=W3:H3 (1)

[0087] An area S2 of the rectangle corresponding to the entrance end 221G is smaller than an area S3 of the rectangle corresponding to the exit end 222G. An area S3 of the rectangle corresponding to the exit end 222G is equal to the area where the green light LG is emitted from the green reflector 22G. Area S3 is smaller than the area of ​​the maximum region where green liquid crystal layer 245G is disposed. The maximum region where green liquid crystal layer 245G is disposed refers to the limit region where green liquid crystal layer 245G is disposed by sealing member 45. The "maximum region" corresponds to green incident-side substrate 243G and green exit-side substrate 244G.

[0088] Next, the liquid crystal sealing region in the green liquid crystal panel 24G will be described with reference to Fig. 11. Fig. 11 is a diagram showing an example of the liquid crystal sealing region in the green liquid crystal panel 24G. The liquid crystal in green liquid crystal panel 24G is filled in sealed region R4, which is a region sealed with sealing member 45, in the gap between green incident-side substrate 243G and green exit-side substrate 244G. The region of the sealing member 45 where the pixel electrodes 416 are formed functions as a region that generates green image light IG. When not all of the pixel electrodes 416 are located in the sealing region R4, the pixel electrodes 416 arranged in the sealing region R4 function as a region that generates green image light IG. The sealing region R4 is formed in a rectangular shape. The sealing region R4 is formed in, for example, a rectangular shape. The area S4 of the sealing region R4 is equal to, for example, the area S3 of the rectangle corresponding to the emission end 222G. Furthermore, the area S4 of the sealing region R4 is smaller than, for example, the area S3 of the rectangle corresponding to the emission end 222G. The area S4 is, for example, the sealed region R4 where the green liquid crystal layer 245G is disposed, and is also the area where the plurality of pixel electrodes 416 and the plurality of first microlenses 247G overlap.

[0089] The length W4 of the sealing region R4 in the X-axis direction is greater than the length H4 of the sealing region R4 in the Z-axis direction. The sealing region R4 is formed in a rectangular shape. The length W4 is the length of the long side of the rectangle corresponding to the sealing region R4. The length H4 is the length of the short side of the rectangle corresponding to the sealing region R4. The sealing region R4 is formed so that the aspect ratio of the rectangle corresponding to the sealing region R4 matches the aspect ratio of the emission end 222G of the green reflector 22G. That is, the sealing region R4 is formed so that the following formula (2) is satisfied. W4:H4=W3:H3 (2)

[0090] The area of ​​the green light LG emitted from the green collimating lens 23G is equal to or larger than the area S4 of the sealing region R4. The area S4 of the sealing region R4 corresponds to an example of the area of ​​the region where the green liquid crystal layer 245G is disposed when the green liquid crystal panel 24G is viewed from the normal direction of the incident surface through which the green light LG is incident on the green liquid crystal panel 24G.

[0091] [Embodiment and Effects] As described above with reference to FIGS. 1 to 11, the projector 100 according to this embodiment includes the green solid-state light source 211G that emits green light LG, the blue solid-state light source 211B that emits blue light LB that has a wavelength different from that of the green light LG, the red solid-state light source 211R that emits red light LR that has a wavelength different from that of the green light LG and the blue light LB, the projection lens 27 that emits the green light LG, the blue light LB, and the red light LR, the green reflector 22G that is disposed in the optical path of the green light LG between the projection lens 27 and the green solid-state light source 211G, and the green reflector 22G that is disposed in the optical path of the green light LG between the projection lens 27 and the green reflector 22G. a green liquid crystal panel 24G arranged in the optical path of the green light LG between the projection lens 27 and the green collimating lens 23G, a green liquid crystal panel 24G arranged in the optical path of the green light LG between the projection lens 27 and the green liquid crystal panel 24G, the green liquid crystal panel 24G including a green entrance-side substrate 243G into which the green light LG is incident, a green exit-side substrate 244G from which the green light LG is emitted, and a green liquid crystal layer 245G sandwiched between the green entrance-side substrate 243G and the green exit-side substrate 244G, the green exit-side substrate 244G being a transparent an emission glass substrate 248G having a light-transmitting property and having an emission surface from which green light LG is emitted; a plurality of scanning electrodes 411 formed on the emission glass substrate 248G; a plurality of signal electrodes 413 formed on the emission glass substrate 248G and intersecting with each of the plurality of scanning electrodes 411; a plurality of pixel electrodes 416 formed on the emission glass substrate 248G and adjacent to one of the intersections at which the plurality of scanning electrodes 411 intersect with the plurality of signal electrodes 413; The green incident side substrate 243G includes a light-transmitting incident glass substrate 249G having an incident surface on which the green light LG is incident, a common electrode 247 formed on the incident glass substrate 249G and arranged to face the plurality of pixel electrodes 416 with the green liquid crystal layer 245G interposed therebetween, the common electrode 247 applying a voltage to the green liquid crystal layer 245G, and a plurality of first microlenses 247G formed on the incident glass substrate 249G, each of the plurality of first microlenses 247G beingProjector 100 focuses green light LG toward a corresponding one of a plurality of pixel electrodes 416, and a first angle θ1, which is the angle that the green light LG makes after passing through green collimating lens 23G with respect to the normal to the incident surface of green liquid crystal panel 24G, is smaller than a second angle θ2, which is the angle that the green light LG makes after passing through green reflector 22G and before passing through green collimating lens 23G with respect to the normal to the incident surface of green liquid crystal panel 24G.

[0092] Therefore, since the structure is such that the green light LG enters the green liquid crystal panel 24G, the green light LG exits from the green liquid crystal panel 24G, and then exits from the projection lens 17, there is no need to use components that absorb light, such as a color filter, and the utilization efficiency of the green light LG can be improved. Furthermore, the green collimating lens 23G can make the angle of incidence on the incident surface of the green liquid crystal panel 24G approach zero degrees, thereby suppressing the diffusion of the green light LG and increasing the utilization efficiency of the green light LG.

[0093] Furthermore, in the projector 100, when the plurality of scanning electrodes 411 apply a voltage to the gates of the plurality of transistors 414, the plurality of signal electrodes 413 input a signal to the source of the plurality of transistors 414, and each of the plurality of pixel electrodes 416 is electrically connected to the drain of a corresponding one of the plurality of transistors 414, when the green liquid crystal panel 24G is viewed in a plane in the normal direction of the green liquid crystal panel 24G, at least a portion of the semiconductor film 414F constituting the plurality of transistors 414 is covered by a corresponding one of the plurality of signal electrodes 413, and the gate of each of the plurality of transistors 414 is arranged so as to overlap the area where a corresponding one of the plurality of signal electrodes 413 and a corresponding one of the plurality of scanning electrodes 411 intersect.

[0094] Therefore, when the green liquid crystal panel 24G is viewed in a plan view from the normal direction, at least a portion of the semiconductor film 414F is covered by each of the multiple signal electrodes 413, thereby reducing the area where the semiconductor film 414F blocks the green light LG incident from the normal direction of the green liquid crystal panel 24G, thereby improving the utilization efficiency of the green light LG.

[0095] In addition, in the projector 100, a second microlens is arranged on the output glass substrate 248G downstream of the optical path of the green light LG relative to the first microlens 247G, and the second microlens diffuses the green light LG focused by the first microlens 247G.

[0096] Therefore, by diffusing the green light LG collected by the first microlens 247G with the second microlens, the green light LG can be made closer to parallel light, thereby improving the utilization efficiency of the green light LG.

[0097] The projector 100 according to this embodiment includes a green solid-state light source 211G that emits green light LG, a blue solid-state light source 211B that emits blue light LB that has a wavelength different from that of the green light LG, a red solid-state light source 211R that emits red light LR that has a wavelength different from that of the green light LG and the blue light LB, a projection lens 27 that emits the green light LG, the blue light LB, and the red light LR, a green reflector 22G that is disposed in the optical path of the green light LG between the projection lens 27 and the green solid-state light source 211G, and a green collimating lens 23G that is disposed in the optical path of the green light LG between the projection lens 27 and the green reflector 22G. a green liquid crystal panel 24G disposed in the optical path of the green light LG between the projection lens 27 and the green collimating lens 23G; and a prism 25 disposed in the optical path of the green light LG between the projection lens 27 and the green liquid crystal panel 24G, wherein the green liquid crystal panel 24G includes a green incident-side substrate 243G into which the green light LG is incident, a green exit-side substrate 244G from which the green light LG is emitted, and a green liquid crystal layer 245G sandwiched between the green incident-side substrate 243G and the green exit-side substrate 244G, and the green incident-side substrate 243G is light-transmitting and includes an entrance glass substrate 249 having an entrance surface from which the green light LG is emitted. G, a plurality of scanning electrodes 411 formed on the incident glass substrate 249G, a plurality of signal electrodes 413 formed on the incident glass substrate 249G and intersecting with each of the plurality of scanning electrodes 411, a plurality of pixel electrodes 416 formed on the incident glass substrate 249G and adjacent to any one of the intersections at which the plurality of scanning electrodes 411 intersect with the plurality of signal electrodes 413, and a plurality of pixel electrodes 416 formed on the incident glass substrate 249G and electrically connected to any one of the pixel electrodes 416 and to any one of the plurality of signal electrodes 413. the green output side substrate 244G includes a light-transmitting output glass substrate 248G having an output surface from which the green light LG is output, and a common electrode 417 formed on the output glass substrate 248G and arranged to face the plurality of pixel electrodes 416 with the green liquid crystal layer 245G interposed therebetween, the common electrode 417 applying a voltage to the green liquid crystal layer 245G, and each of the plurality of first microlenses 247G focuses the green light LG toward a corresponding one of the plurality of pixel electrodes 416;In projector 100, a first angle θ1, which is the angle that green light LG that has passed through green collimating lens 23G makes with the normal to the incident surface of green liquid crystal panel 24G, is smaller than a second angle θ2, which is the angle that green light LG that has passed through green reflector 22G but before passing through green collimating lens 23G makes with the normal to the incident surface of green liquid crystal panel 24G.

[0098] Therefore, since the structure is such that the green light LG enters the green liquid crystal panel 24G, the green light LG exits from the green liquid crystal panel 24G, and then exits from the projection lens 17, there is no need to use components that absorb light, such as a color filter, and the utilization efficiency of the green light LG can be improved. Furthermore, the green collimating lens 23G can make the angle of incidence on the incident surface of the green liquid crystal panel 24G approach zero degrees, thereby suppressing the diffusion of the green light LG and increasing the utilization efficiency of the green light LG.

[0099] Furthermore, in the projector 100, when the plurality of scanning electrodes 411 apply a voltage to the gates of the plurality of transistors 414, the plurality of signal electrodes 413 input a signal to the source of the plurality of transistors 414, and each of the plurality of pixel electrodes 416 is electrically connected to the drain of a corresponding one of the plurality of transistors 414, when the green liquid crystal panel 24G is viewed in a plane in the normal direction of the green liquid crystal panel 24G, at least a portion of the semiconductor film 414F constituting the plurality of transistors 414 is covered by a corresponding one of the plurality of signal electrodes 413, and the gate of each of the plurality of transistors 414 is arranged so as to overlap the area where a corresponding one of the plurality of signal electrodes 413 and a corresponding one of the plurality of scanning electrodes 411 intersect.

[0100] Therefore, when the green liquid crystal panel 24G is viewed in a plan view from the normal direction, at least a portion of the semiconductor film 414F is covered by each of the multiple signal electrodes 413, thereby reducing the area where the semiconductor film 414F blocks the green light LG incident from the normal direction of the green liquid crystal panel 24G, thereby improving the utilization efficiency of the green light LG.

[0101] In addition, in the projector 100, a second microlens is arranged on the output glass substrate 248G downstream of the optical path of the green light LG relative to the first microlens 247G, and the second microlens diffuses the green light LG focused by the first microlens 247G.

[0102] Therefore, by diffusing the green light LG collected by the first microlens 247G with the second microlens, the green light LG can be made closer to parallel light, thereby improving the utilization efficiency of the green light LG.

[0103] Furthermore, in the projector 100, the area S3 of the green light LG emitted from the green parallelizing lens 23G is equal to or larger than the area S4 of the sealing region R4 in which the green liquid crystal layer 245G is disposed when the green liquid crystal panel 24G is viewed from the normal direction of the incident surface through which the green light LG enters the green liquid crystal panel 24G.

[0104] Therefore, the green light LG emitted from the green collimating lens 23G can reliably cover the sealed region R4 where the green liquid crystal layer 245G of the green liquid crystal panel 24G exists, thereby improving the utilization efficiency of the green light LG.

[0105] In projector 100, area S3 where green light LG is emitted from green collimating lens 23G is equal to or larger than area S4, which is the sealed area where green liquid crystal layer 245G is disposed when green liquid crystal panel 24G is viewed from the normal direction of the incident surface where green light LG is incident on green liquid crystal panel 24G, and where multiple pixel electrodes 416 and multiple first microlenses 247G overlap, and is smaller than the area of ​​the maximum area where green liquid crystal layer 245G is disposed. Note that the "maximum area" corresponds to green incident-side substrate 243G and green exit-side substrate 244G.

[0106] Here, the maximum area of ​​the area where the green liquid crystal layer 245G is disposed refers to the area where the green liquid crystal layer 245G is limited by the sealing member 45. In contrast, the area where the pixel electrode 416 and the first microlens 247G overlap refers to the area of ​​the portion through which incident light passes. At the end of the area where the green liquid crystal layer 245G is disposed, the pixel electrode 416 is not formed, and the drive circuit 4 is formed instead. Therefore, since incident light does not pass through the end of the green liquid crystal layer 245G, if green light LG is incident on this portion, the utilization efficiency of the green light LG decreases. Therefore, it is preferable that the area of ​​the green light LG emitted from the green collimating lens 23G is large enough not to cover the edge of the green liquid crystal layer 245G. According to the above-described configuration, the green light LG emitted from the green collimating lens 23G can reliably cover the area of ​​the green liquid crystal panel 24G where the green liquid crystal layer 245G is present. Therefore, the utilization efficiency of the green light LG can be improved.

[0107] In addition, in the projector 100, the shape of the exit end 222G of the green reflector 22G that contacts the green parallelizing lens 23G is rectangular, and when the green liquid crystal panel 24G is viewed from the normal direction of the incident surface onto which the green light LG of the green liquid crystal panel 24G is incident, the shape of the sealing region R4 in which the green liquid crystal layer 245G is arranged is rectangular.

[0108] Therefore, since the shape of the emission end 222G of the green reflector 22G is rectangular and the shape of the sealing region R4 is also rectangular, the green light LG emitted from the green reflector 22G can be overlapped with the sealing region R4, thereby improving the utilization efficiency of the green light LG.

[0109] In addition, in the projector 100, the shape of the exit end 222G of the green reflector 22G is rectangular, the shape of the sealing area R4 of the entrance surface of the green liquid crystal panel 24G is rectangular, and the aspect ratio of the exit end 222G of the green reflector 22G is equal to the aspect ratio of the sealing area R4 of the entrance surface of the green liquid crystal panel 24G.

[0110] Therefore, since the aspect ratio of the exit end 222G of the green reflector 22G is equal to the aspect ratio of the sealing region R4 of the incident surface of the green liquid crystal panel 24G, the green light LG emitted from the green reflector 22G can be overlapped with the sealing region R4, thereby improving the utilization efficiency of the green light LG.

[0111] Furthermore, in projector 100, the area where green light LG enters green collimating lens 23G is equal to the area where green light LG exits green collimating lens 23G.

[0112] Therefore, the green light LG emitted from the green collimating lens 23G can be emitted as parallel light over an area equal to the area where the green light LG enters the green collimating lens 23G, thereby improving the utilization efficiency of the green light LG.

[0113] The projector 100 also includes a blue reflector 22B arranged in the optical path of the blue light LB between the projection lens 27 and the blue solid-state light source 211B, a blue collimating lens 23B arranged in the optical path of the blue light LB between the projection lens 27 and the blue reflector 22B, a blue liquid crystal panel 24B arranged in the optical path of the blue light LB between the projection lens 27 and the blue collimating lens 23B, a red reflector 22R arranged in the optical path of the red light LR between the projection lens 27 and the red solid-state light source 211R, a red collimating lens 23R arranged in the optical path of the red light LR between the projection lens 27 and the red reflector 22R, and a red liquid crystal panel 24R arranged in the optical path of the red light LR between the projection lens 27 and the red collimating lens 23R, wherein the blue liquid crystal panel 24B includes a blue liquid crystal layer and the red liquid crystal panel 24R includes a red The green reflector 22G includes a green liquid crystal layer, and the shape of the end of the green reflector 22G that contacts the green parallelizing lens 23G is rectangular, the shape of the exit end of the blue reflector 22B that contacts the blue parallelizing lens 23B is rectangular, and the shape of the exit end of the red reflector 22R that contacts the red parallelizing lens 23R is rectangular.When the green liquid crystal panel 24G is viewed normal to the incident surface where green light LG of the green liquid crystal panel 24G is incident, the shape of the sealing area where the green liquid crystal layer 245G is arranged is rectangular.When the blue liquid crystal panel 24B is viewed normal to the incident surface where blue light LB of the blue liquid crystal panel 24B is incident, the shape of the sealing area where the blue liquid crystal layer is arranged is rectangular.When the red liquid crystal panel 24R is viewed normal to the incident surface where red light LR of the red liquid crystal panel 24R is incident, the shape of the area where the red liquid crystal layer is arranged is rectangular.

[0114] Therefore, the configurations of the blue reflector 22B, the blue collimating lens 23B, and the blue liquid crystal panel 24B match those of the green reflector 22G, the green collimating lens 23G, and the green liquid crystal panel 24G. Also, the configurations of the red reflector 22R, the red collimating lens 23R, and the red liquid crystal panel 24R match those of the green reflector 22G, the green collimating lens 23G, and the green liquid crystal panel 24G. Therefore, the utilization efficiency of the blue light LB and the red light LR can be increased, just like that of the green light LG.

[0115] In the projector 100, the shape of the exit end 222G of the green reflector 22G, the shape of the exit end of the blue reflector 22B, and the shape of the exit end of the red reflector 22R are all rectangular, the shape of the sealing area R4 of the incident surface of the green liquid crystal panel 24G, the shape of the sealing area of ​​the incident surface of the blue liquid crystal panel 24B, and the shape of the sealing area of ​​the incident surface of the red liquid crystal panel 24R are all rectangular, the aspect ratio of the exit end 222G of the green reflector 22G is equal to the aspect ratio of the sealing area R4 of the incident surface of the green liquid crystal panel 24G, the aspect ratio of the exit end of the blue reflector 22B is equal to the aspect ratio of the sealing area of ​​the incident surface of the blue liquid crystal panel 24B, and the aspect ratio of the exit end of the red reflector 22R is equal to the aspect ratio of the shape of the sealing area of ​​the incident surface of the red liquid crystal panel 24R.

[0116] Therefore, because the aspect ratio of the exit end 222G of the green reflector 22G is equal to the aspect ratio of the sealing region R4 of the incident surface of the green liquid crystal panel 24G, the green light LG emitted from the green reflector 22G can overlap with the sealing region R4. This improves the utilization efficiency of the green light LG. Furthermore, because the aspect ratio of the exit end of the blue reflector 22B is equal to the aspect ratio of the sealing region of the incident surface of the blue liquid crystal panel 24B, the blue light LB emitted from the blue reflector 22B can overlap with the sealing region of the blue liquid crystal panel 24B. This improves the utilization efficiency of the blue light LB. Furthermore, because the aspect ratio of the exit end of the red reflector 22R is equal to the aspect ratio of the shape of the sealing region of the incident surface of the red liquid crystal panel 24R, the red light LR emitted from the red reflector 22R can overlap with the sealing region of the red liquid crystal panel 24R. This improves the utilization efficiency of the red light LR.

[0117] In addition, in the projector 100, the area S3 of the exit end 222G of the green reflector 22G is equal to or larger than the area S4 of the sealing area R4 of the incident surface of the green LCD panel 24G, the area of ​​the exit end of the blue reflector 22B is equal to or larger than the area of ​​the sealing area of ​​the incident surface of the blue LCD panel 24B, and the area of ​​the exit end of the red reflector 22R is equal to or larger than the area of ​​the sealing area of ​​the incident surface of the red LCD panel 24R.

[0118] Therefore, the green light LG emitted from the emission end 222G of the green reflector 22G can reliably cover the sealing region R4 of the green liquid crystal panel 24G. This can improve the utilization efficiency of the green light LG. Furthermore, the blue light LB emitted from the emission end of the blue reflector 22B can reliably cover the sealing region of the blue liquid crystal panel 24B. This can improve the utilization efficiency of the blue light LB. Furthermore, the red light LR emitted from the emission end of the red reflector 22R can reliably cover the sealing region of the red liquid crystal panel 24R. This can improve the utilization efficiency of the red light LR.

[0119] Furthermore, in the projector 100, a blue reflector 22B is arranged in the optical path of the blue light LB between the projection lens 27 and the blue solid-state light source 211B, a blue collimating lens 23B is arranged in the optical path of the blue light LB between the projection lens 27 and the blue reflector 22B, a blue liquid crystal panel 24B is arranged in the optical path of the blue light LB between the projection lens 27 and the blue collimating lens 23B, a red reflector 22R is arranged in the optical path of the red light LR between the projection lens 27 and the red solid-state light source 211R, and a red collimating lens 23B is arranged in the optical path of the red light LR between the projection lens 27 and the red reflector 22R. and a red liquid crystal panel 24R arranged in the optical path of the red light LR between the projection lens 27 and the red collimating lens 23R. Each of the green solid-state light source 211G, the blue solid-state light source 211B, and the red solid-state light source 211R includes a substrate and a plurality of LEDs arranged on the substrate, the green reflector 22G shapes the green light LG emitted by the green solid-state light source 211G into a rectangle, the blue reflector 22B shapes the blue light LB emitted by the blue solid-state light source 211B into a rectangle, and the red reflector 22R shapes the red light LR emitted by the red solid-state light source 211R into a rectangle.

[0120] Therefore, since the green light LG emitted from the multiple LEDs is shaped into a rectangle by the green reflector 22G, the utilization efficiency of the green light LG incident on the green liquid crystal panel 24G can be improved. Also, since the blue light LB emitted from the multiple LEDs is shaped into a rectangle by the blue reflector 22B, the utilization efficiency of the blue light LB incident on the blue liquid crystal panel 24B can be improved. Also, since the red light LR emitted from the multiple LEDs is shaped into a rectangle by the red reflector 22R, the utilization efficiency of the red light LR incident on the red liquid crystal panel 24R can be improved.

[0121] Furthermore, in the projector 100, a blue reflector 22B is arranged in the optical path of the blue light LB between the projection lens 27 and the blue solid-state light source 211B, a blue collimating lens 23B is arranged in the optical path of the blue light LB between the projection lens 27 and the blue reflector 22B, a blue liquid crystal panel 24B is arranged in the optical path of the blue light LB between the projection lens 27 and the blue collimating lens 23B, a red reflector 22R is arranged in the optical path of the red light LR between the projection lens 27 and the red solid-state light source 211R, and a red collimating lens 23B is arranged in the optical path of the red light LR between the projection lens 27 and the red reflector 22R. The green solid-state light source 211G, the blue solid-state light source 211B, and the red solid-state light source 211R each include a substrate and a plurality of laser diodes arranged on a substrate base, the green reflector 22G shapes the green light LG emitted by the green solid-state light source 211G into a rectangle, the blue reflector 22B shapes the blue light LB emitted by the blue solid-state light source 211B into a rectangle, and the red reflector 22R shapes the red light LR emitted by the red solid-state light source 211R into a rectangle.

[0122] Therefore, since the green light LG emitted from the multiple laser diodes is shaped into a rectangle by the green reflector 22G, the utilization efficiency of the green light LG incident on the green liquid crystal panel 24G can be improved. Also, since the blue light LB emitted from the multiple laser diodes is shaped into a rectangle by the blue reflector 22B, the utilization efficiency of the blue light LB incident on the blue liquid crystal panel 24B can be improved. Also, since the red light LR emitted from the multiple laser diodes is shaped into a rectangle by the red reflector 22R, the utilization efficiency of the red light LR incident on the red liquid crystal panel 24R can be improved.

[0123] Furthermore, in the projector 100, a blue reflector 22B is arranged in the optical path of the blue light LB between the projection lens 27 and the blue solid-state light source 211B, a blue collimating lens 23B is arranged in the optical path of the blue light LB between the projection lens 27 and the blue reflector 22B, a blue liquid crystal panel 24B is arranged in the optical path of the blue light LB between the projection lens 27 and the blue collimating lens 23B, a red reflector 22R is arranged in the optical path of the red light LR between the projection lens 27 and the red solid-state light source 211R, a red collimating lens 23R is arranged in the optical path of the red light LR between the projection lens 27 and the red reflector 22R, a red liquid crystal panel 24R is arranged in the optical path of the red light LR between the projection lens 27 and the red collimating lens 23R, and The projection lens 27 includes a green incident polarizer 241G arranged in the optical path of green light LG between the projection lens 27 and the color collimating lens 23G, a blue incident polarizer 241B arranged in the optical path of blue light LB between the projection lens 27 and the blue collimating lens 23B, and a red incident polarizer 241R arranged in the optical path of red light LR between the projection lens 27 and the red collimating lens 23R, wherein the green incident polarizer 241G is arranged between the green collimating lens 23G and the green liquid crystal panel 24G, the blue incident polarizer 241B is arranged between the blue collimating lens 23B and the blue liquid crystal panel 24B, and the red incident polarizer 241R is arranged between the red collimating lens 23R and the red liquid crystal panel 24R, and each of the green incident polarizer 241G, the blue incident polarizer 241B, and the red incident polarizer 241R is a reflective polarizer.

[0124] Therefore, because the green incident polarizer 241G is a reflective polarizer, the green light LG reflected by the green incident polarizer 241G passes through the green collimating lens 23G, is returned to the green reflector 22G, is reflected there again, and returns to the green incident polarizer 241G. This increases the utilization efficiency of the green light LG. Furthermore, because the blue incident polarizer 241B is a reflective polarizer, the blue light LB reflected by the blue incident polarizer 241B passes through the blue collimating lens 23B, is returned to the blue reflector 22B, is reflected there again, and returns to the blue incident polarizer 241B. This increases the utilization efficiency of the blue light LB. Furthermore, because the red incident polarizer 241R is a reflective polarizer, the red light LR reflected by the red incident polarizer 241R passes through the red collimating lens 23R, is returned to the red reflector 22R, is reflected there again, and returns to the red incident polarizer 241R. This increases the utilization efficiency of the red light LR.

[0125] Furthermore, in the projector 100, a blue reflector 22B is arranged in the optical path of the blue light LB between the projection lens 27 and the blue solid-state light source 211B, a blue collimating lens 23B is arranged in the optical path of the blue light LB between the projection lens 27 and the blue reflector 22B, a blue liquid crystal panel 24B is arranged in the optical path of the blue light LB between the projection lens 27 and the blue collimating lens 23B, a red reflector 22R is arranged in the optical path of the red light LR between the projection lens 27 and the red solid-state light source 211R, a red collimating lens 23R is arranged in the optical path of the red light LR between the projection lens 27 and the red reflector 22R, a red liquid crystal panel 24R is arranged in the optical path of the red light LR between the projection lens 27 and the red collimating lens 23R, and The projection lens 27 includes a green incident polarizer 241G arranged in the optical path of green light LG between the projection lens 27 and the color collimating lens 23G, a blue incident polarizer 241B arranged in the optical path of blue light LB between the projection lens 27 and the blue collimating lens 23B, and a red incident polarizer 241R arranged in the optical path of red light LR between the projection lens 27 and the red collimating lens 23R, wherein the green incident polarizer 241G is arranged between the green collimating lens 23G and the green liquid crystal panel 24G, the blue incident polarizer 241B is arranged between the blue collimating lens 23B and the blue liquid crystal panel 24B, and the red incident polarizer 241R is arranged between the red collimating lens 23R and the red liquid crystal panel 24R, and each of the green incident polarizer 241G, the blue incident polarizer 241B, and the red incident polarizer 241R is an inorganic polarizer.

[0126] Therefore, because green incident polarizer 241G, blue incident polarizer 241B, and red incident polarizer 241R are each an inorganic polarizer, deterioration due to heating can be suppressed compared to when an organic polarizer is used, and the light intensity of each of green solid-state light source 211G, blue solid-state light source 211B, and red solid-state light source 211R can be increased.

[0127] [Other embodiments] The above-described embodiment is a preferred embodiment, but is not limited to the above-described embodiment, and various modifications are possible within the scope of the gist of the present invention.

[0128] In this embodiment, the case where the "first light" is green light LG, the "second light" is blue light LB, and the "third light" is red light LR will be described, but the embodiment is not limited thereto. The "first light" may be any of green light LG, blue light LB, and red light LR.

[0129] In this embodiment, as described with reference to Figure 9, the semiconductor film 414F of the transistor 414 is formed on the signal electrode 413, but it is sufficient that at least a portion of the semiconductor film 414F of the transistor 414 is formed on the signal electrode 413.

[0130] 1 indicates a functional configuration, and the specific implementation form is not particularly limited. In other words, it is not necessary to implement hardware corresponding to each functional unit individually, and it is also possible to configure a configuration in which a single processor executes a program to realize the functions of multiple functional units. Also, some of the functions realized by software in the above embodiments may be realized by hardware, or some of the functions realized by hardware may be realized by software. In addition, the specific detailed configuration of each unit of projector 100 can also be changed as desired within the scope of the spirit of the invention.

[0131] [Note] A summary of this disclosure is provided below. (Appendix 1) a first solid-state light source that emits a first light, a second solid-state light source that emits a second light having a wavelength different from that of the first light, a third solid-state light source that emits a third light having a wavelength different from that of the first light and the second light, a projection lens that emits the first light, the second light, and the third light, a first reflector that is disposed in an optical path of the first light between the projection lens and the first solid-state light source, a first collimating lens that is disposed in an optical path of the first light between the projection lens and the first reflector, and a first liquid crystal panel that is disposed in the optical path of the first light between the projection lens and the first collimating lens. and a prism disposed in an optical path of the first light between the projection lens and the first liquid crystal panel, wherein the first liquid crystal panel includes an incident-side substrate into which the first light is incident, an exit-side substrate from which the first light is emitted, and a first liquid crystal layer sandwiched between the incident-side substrate and the exit-side substrate, and the exit-side substrate has light-transmitting properties and includes an exit substrate having an exit surface from which the first light is emitted, a plurality of scanning electrodes formed on the exit substrate, a plurality of signal electrodes formed on the exit substrate and intersecting each of the plurality of scanning electrodes, and a first liquid crystal layer formed on the exit substrate. the first incident-side substrate includes: a plurality of pixel electrodes adjacent to one of the intersections at which a scanning electrode and the plurality of signal electrodes intersect; and a plurality of transistors formed on the output substrate and electrically connected to one of the plurality of pixel electrodes and to one of the plurality of signal electrodes, the first incident-side substrate including an incident substrate having light transmissive properties and having an incident surface onto which the first light is incident; and a common transistor formed on the incident substrate and disposed so as to face the plurality of pixel electrodes with the first liquid crystal layer interposed therebetween, the common transistor applying a voltage to the first liquid crystal layer. a first angle, which is an angle that the first light that has passed through the first collimating lens makes with a normal to the incident surface of the first liquid crystal panel, is smaller than a second angle, which is an angle that the first light that has passed through the first reflector and before passing through the first collimating lens makes with a normal to the incident surface of the first liquid crystal panel.

[0132] This structure allows the first light to enter the first liquid crystal panel, exit from the first liquid crystal panel, and then exit from the projection lens, eliminating the need to use components that absorb light, such as color filters, and increasing the efficiency of use of the first light. Furthermore, the first parallelizing lens can make the angle of incidence of the first light on the incident surface of the first liquid crystal panel approach zero degrees, thereby suppressing diffusion of the first light and improving the utilization efficiency of the first light.

[0133] (Appendix 2) The projector described in Appendix 1, wherein when the plurality of scanning electrodes apply a voltage to a corresponding gate of each of the plurality of transistors, the plurality of signal electrodes input a signal to a corresponding source of each of the plurality of transistors, and each of the plurality of pixel electrodes is electrically connected to a drain of a corresponding one of the plurality of transistors, when the first liquid crystal panel is viewed in a planar view in a normal direction to the first liquid crystal panel, at least a portion of a semiconductor film constituting the plurality of transistors is covered by a corresponding one of the plurality of signal electrodes, and a gate of each of the plurality of transistors is arranged to overlap a region where a corresponding one of the plurality of signal electrodes and a corresponding one of the plurality of scanning electrodes intersect.

[0134] As a result, when the first liquid crystal panel is viewed from above in the normal direction, at least a portion of the semiconductor film is covered by each of the signal electrodes, thereby reducing the area where the semiconductor film blocks the first light incident from the normal direction of the first liquid crystal panel, thereby improving the utilization efficiency of the first light.

[0135] (Appendix 3) The projector according to claim 1 or 2, wherein a second microlens is disposed on the output substrate downstream of the first microlens in the optical path of the first light, and the second microlens diffuses the first light collected by the first microlens.

[0136] This allows the first light condensed by the first microlens to be diffused by the second microlens, thereby making the first light closer to parallel light, thereby improving the utilization efficiency of the first light.

[0137] (Supplementary Note 4) A first solid-state light source that emits a first light, a second solid-state light source that emits a second light having a wavelength different from that of the first light, a third solid-state light source that emits a third light having a wavelength different from that of the first light and the second light, a projection lens that emits the first light, the second light, and the third light, a first reflector that is disposed in an optical path of the first light between the projection lens and the first solid-state light source, a first collimating lens that is disposed in an optical path of the first light between the projection lens and the first reflector, and a first reflector that is disposed in an optical path of the first light between the projection lens and the first collimating lens. a liquid crystal panel; and a prism disposed in an optical path of the first light between the projection lens and the first liquid crystal panel, wherein the first liquid crystal panel includes an incident-side substrate onto which the first light is incident, an exit-side substrate from which the first light is emitted, and a first liquid crystal layer sandwiched between the incident-side substrate and the exit-side substrate, and the incident-side substrate is light-transmitting and includes an incident substrate having an incident surface onto which the first light is incident, a plurality of scanning electrodes formed on the incident substrate, a plurality of signal electrodes formed on the incident substrate and intersecting each of the plurality of scanning electrodes, and a first liquid crystal layer formed on the incident substrate. the exit-side substrate includes a plurality of pixel electrodes adjacent to one of the intersections of a plurality of scanning electrodes and the plurality of signal electrodes; a plurality of transistors formed on the entrance substrate and electrically connected to one of the plurality of pixel electrodes and to one of the plurality of signal electrodes; and a plurality of first microlenses formed on the entrance substrate, wherein the exit-side substrate is a light-transmitting exit substrate having an exit surface from which the first light exits; and a plurality of first microlenses formed on the exit substrate, sandwiching the plurality of pixel electrodes and the first liquid crystal layer therebetween. a common electrode arranged to face each other and capable of applying a voltage to the first liquid crystal layer, wherein each of the plurality of first microlenses focuses the first light toward a corresponding one of the plurality of pixel electrodes, and a first angle, which is an angle that the first light that has passed through the first collimating lens makes with a normal to the incident surface of the first liquid crystal panel, is smaller than a second angle, which is an angle that the first light that has passed through the first reflector and before passing through the first collimating lens makes with a normal to the incident surface of the first liquid crystal panel.

[0138] This structure allows the first light to enter the first liquid crystal panel, exit from the first liquid crystal panel, and then exit from the projection lens, eliminating the need to use components that absorb light, such as color filters, and increasing the efficiency of use of the first light. Furthermore, the first parallelizing lens can make the angle of incidence of the first light on the incident surface of the first liquid crystal panel approach zero degrees, thereby suppressing diffusion of the first light and improving the utilization efficiency of the first light.

[0139] (Appendix 5) The projector described in Appendix 4, wherein when the plurality of scanning electrodes apply a voltage to a corresponding gate of each of the plurality of transistors, the plurality of signal electrodes input a signal to a corresponding source of each of the plurality of transistors, and each of the plurality of pixel electrodes is electrically connected to a drain of a corresponding one of the plurality of transistors, when the first liquid crystal panel is viewed in a planar view in a normal direction to the first liquid crystal panel, at least a portion of a semiconductor film constituting the plurality of transistors is covered by a corresponding one of the plurality of signal electrodes, and a gate of each of the plurality of transistors is arranged to overlap an area where a corresponding one of the plurality of signal electrodes and a corresponding one of the plurality of scanning electrodes intersect.

[0140] As a result, when the first liquid crystal panel is viewed from above in the normal direction, at least a portion of the semiconductor film is covered by each of the signal electrodes, thereby reducing the area where the semiconductor film blocks the first light incident from the normal direction of the first liquid crystal panel, thereby improving the utilization efficiency of the first light.

[0141] (Appendix 6) The projector of claim 4 or 5, wherein a second microlens is arranged on the output substrate downstream of the first microlens in the optical path of the first light, and the second microlens diffuses the first light collected by the first microlens.

[0142] This allows the first light condensed by the first microlens to be diffused by the second microlens, thereby making the first light closer to parallel light, thereby improving the utilization efficiency of the first light.

[0143] (Appendix 7) A projector described in any one of Appendices 1 to 6, wherein the area of ​​the first light exiting the first parallelizing lens is equal to or larger than the area of ​​the region in which the first liquid crystal layer is disposed when the first liquid crystal panel is viewed from the normal direction of the incident surface through which the first light enters the first liquid crystal panel.

[0144] This allows the first light emitted from the first collimating lens to reliably cover the sealed region where the first liquid crystal layer of the first liquid crystal panel is present, thereby improving the utilization efficiency of the first light.

[0145] (Appendix 8) A projector described in any one of Appendices 1 to 7, wherein the area from which the first light is emitted from the first parallelizing lens is the area in which the first liquid crystal layer is disposed when the first liquid crystal panel is viewed from the normal direction of the incident surface of the first liquid crystal panel into which the first light is incident, and is equal to or larger than the area where the plurality of pixel electrodes and the plurality of first microlenses overlap, and is smaller than the area of ​​the largest area in which the first liquid crystal layer is disposed.

[0146] Here, the maximum area of ​​the area where the first liquid crystal layer is disposed refers to the area where the first liquid crystal layer can be disposed within the limits of the sealing member. In contrast, the area where the pixel electrodes and the first microlenses overlap refers to the area of ​​the portion through which incident light passes. At the edge of the area where the first liquid crystal layer is disposed, pixel electrodes are not formed, but a driving circuit is formed instead. Therefore, since incident light does not pass through the edge of the first liquid crystal layer, if the first light is incident on this portion, the utilization efficiency of the first light decreases. Therefore, it is preferable that the area of ​​the first light emitted from the first collimating lens is large enough not to cover the edge of the first liquid crystal layer. According to the above configuration, the first light emitted from the first collimating lens can reliably cover the area of ​​the first liquid crystal panel where the first liquid crystal layer is present. Therefore, the utilization efficiency of the first light can be improved.

[0147] (Appendix 9) A projector described in any one of Appendices 1 to 8, wherein the shape of the end of the first reflector that contacts the first parallelizing lens is rectangular, and when the first liquid crystal panel is viewed from the normal direction of the incident surface of the first liquid crystal panel onto which the first light is incident, the shape of the area in which the first liquid crystal layer is arranged is rectangular.

[0148] As a result, since the shape of the light-emitting end of the first reflector is rectangular and the shape of the sealing area is also rectangular, the first light emitted from the first reflector can be overlapped with the sealing area, thereby improving the utilization efficiency of the first light.

[0149] (Appendix 10) A projector described in Appendix 9, wherein the shape of the end of the first reflector is rectangular, the shape of the area of ​​the incident surface of the first liquid crystal panel is rectangular, and the aspect ratio of the end of the first reflector is equal to the aspect ratio of the area of ​​the incident surface of the first liquid crystal panel.

[0150] This allows the aspect ratio of the exit end of the first reflector to be equal to the aspect ratio of the sealing area of ​​the entrance surface of the first liquid crystal panel, so that the first light emitted from the first reflector can be overlapped with the sealing area, thereby improving the utilization efficiency of the first light.

[0151] (Supplementary Note 11) The projector according to Supplementary Note 10, wherein an area where the first light enters the first collimating lens is equal to an area where the first light exits from the first collimating lens.

[0152] This allows the first light emitted from the first collimating lens to be emitted as parallel light from an area equal to the area of ​​the first collimating lens where the first light is incident, thereby improving the utilization efficiency of the first light.

[0153] (Supplementary Note 12) A projection system including: a second reflector disposed in an optical path of the second light between the projection lens and the second solid-state light source; a second collimating lens disposed in the optical path of the second light between the projection lens and the second reflector; a second liquid crystal panel disposed in the optical path of the second light between the projection lens and the second collimating lens; a third reflector disposed in the optical path of the third light between the projection lens and the third solid-state light source; a third collimating lens disposed in the optical path of the third light between the projection lens and the third reflector; and a third liquid crystal panel disposed in the optical path of the third light between the projection lens and the third collimating lens, wherein the second liquid crystal panel includes a second liquid crystal layer, and the third liquid crystal panel includes a third liquid crystal layer; the shape of the end of the reflector is rectangular, the shape of the end of the second reflector that contacts the second parallelizing lens is rectangular, the shape of the end of the third reflector that contacts the third parallelizing lens is rectangular, when the first liquid crystal panel is viewed in a direction normal to an incident surface of the first liquid crystal panel on which the first light is incident, the shape of the area where the first liquid crystal layer is disposed is rectangular, when the second liquid crystal panel is viewed in a direction normal to an incident surface of the second liquid crystal panel on which the second light is incident, the shape of the area where the second liquid crystal layer is disposed is rectangular, and when the third liquid crystal panel is viewed in a direction normal to an incident surface of the third liquid crystal panel on which the third light is incident, the shape of the area where the third liquid crystal layer is disposed is rectangular.

[0154] As a result, the configurations of the second reflector, the second collimating lens, and the second liquid crystal panel are identical to the configurations of the first reflector, the first collimating lens, and the first liquid crystal panel. Also, the configurations of the third reflector, the third collimating lens, and the third liquid crystal panel are identical to the configurations of the first reflector, the first collimating lens, and the first liquid crystal panel. Therefore, the utilization efficiency of the second light and the third light can be increased, similar to that of the first light.

[0155] (Appendix 13) The projector described in Appendix 12, wherein the shape of the end of the first reflector, the shape of the end of the second reflector, and the shape of the end of the third reflector are each rectangular; the shape of the area of ​​the incident surface of the first liquid crystal panel, the shape of the area of ​​the incident surface of the second liquid crystal panel, and the shape of the area of ​​the incident surface of the third liquid crystal panel are each rectangular; the aspect ratio of the end of the first reflector is equal to the aspect ratio of the area of ​​the incident surface of the first liquid crystal panel; the aspect ratio of the end of the second reflector is equal to the aspect ratio of the area of ​​the incident surface of the second liquid crystal panel; and the aspect ratio of the end of the third reflector is equal to the aspect ratio of the area of ​​the incident surface of the third liquid crystal panel.

[0156] As a result, the aspect ratio of the exit end of the first reflector is equal to the aspect ratio of the sealing area of ​​the incident surface of the first liquid crystal panel, so the first light emitted from the first reflector can overlap with the sealing area. This increases the utilization efficiency of the first light. Similarly to the first light, the utilization efficiency of the second and third lights can also be increased.

[0157] (Appendix 14) A projector as described in Appendix 13, wherein the area of ​​the end of the first reflector is equal to or larger than the area of ​​the region of the incident surface of the first liquid crystal panel, the area of ​​the end of the second reflector is equal to or larger than the area of ​​the region of the incident surface of the second liquid crystal panel, and the area of ​​the end of the third reflector is equal to or larger than the area of ​​the region of the incident surface of the third liquid crystal panel.

[0158] This allows the first light emitted from the exit end of the first reflector to reliably cover the sealing area of ​​the first liquid crystal panel. Therefore, the utilization efficiency of the first light can be improved. Furthermore, the second light emitted from the exit end of the second reflector can reliably cover the sealing area of ​​the second liquid crystal panel. Therefore, the utilization efficiency of the second light can be improved. Furthermore, the third light emitted from the exit end of the third reflector can reliably cover the sealing area of ​​the third liquid crystal panel. Therefore, the utilization efficiency of the third light can be improved.

[0159] (Supplementary Note 15) A second reflector disposed in an optical path of the second light between the projection lens and the second solid-state light source, a second collimating lens disposed in an optical path of the second light between the projection lens and the second reflector, a second liquid crystal panel disposed in an optical path of the second light between the projection lens and the second collimating lens, a third reflector disposed in an optical path of the third light between the projection lens and the third solid-state light source, a third collimating lens disposed in an optical path of the third light between the projection lens and the third reflector, and a second liquid crystal panel disposed in an optical path of the second light between the projection lens and the third solid-state light source. and a third liquid crystal panel arranged in an optical path of the third light between the first solid-state light source and a third collimating lens, wherein each of the first solid-state light source, the second solid-state light source, and the third solid-state light source includes a base and a plurality of LEDs arranged on the base, the first reflector shapes the first light emitted from the first solid-state light source into a rectangular shape, the second reflector shapes the second light emitted from the second solid-state light source into a rectangular shape, and the third reflector shapes the third light emitted from the third solid-state light source into a rectangular shape.

[0160] As a result, the first light emitted from the multiple LEDs is shaped into a rectangle by the first reflector, thereby improving the utilization efficiency of the first light incident on the first liquid crystal panel. Also, the second light emitted from the multiple LEDs is shaped into a rectangle by the second reflector, thereby improving the utilization efficiency of the second light incident on the second liquid crystal panel. Also, the third light emitted from the multiple LEDs is shaped into a rectangle by the third reflector, thereby improving the utilization efficiency of the third light incident on the third liquid crystal panel.

[0161] (Supplementary Note 16) A second reflector disposed in an optical path of the second light between the projection lens and the second solid-state light source, a second collimating lens disposed in an optical path of the second light between the projection lens and the second reflector, a second liquid crystal panel disposed in an optical path of the second light between the projection lens and the second collimating lens, a third reflector disposed in an optical path of the third light between the projection lens and the third solid-state light source, a third collimating lens disposed in an optical path of the third light between the projection lens and the third reflector, and a second liquid crystal panel disposed in an optical path of the second light between the projection lens and the third collimating lens. and a third liquid crystal panel disposed on an optical path of the third light between the first solid-state light source and a rectifying lens, wherein the first solid-state light source, the second solid-state light source, and the third solid-state light source each include a base and a plurality of laser diodes arranged on the base, the first reflector shapes the first light emitted from the first solid-state light source into a rectangular shape, the second reflector shapes the second light emitted from the second solid-state light source into a rectangular shape, and the third reflector shapes the third light emitted from the third solid-state light source into a rectangular shape.

[0162] As a result, the first light emitted from the multiple laser diodes is shaped into a rectangle by the first reflector, thereby improving the utilization efficiency of the first light incident on the first liquid crystal panel. Also, the second light emitted from the multiple laser diodes is shaped into a rectangle by the second reflector, thereby improving the utilization efficiency of the second light incident on the second liquid crystal panel. Also, the third light emitted from the multiple laser diodes is shaped into a rectangle by the third reflector, thereby improving the utilization efficiency of the third light incident on the third liquid crystal panel.

[0163] (Supplementary Note 17) A second reflector disposed in an optical path of the second light between the projection lens and the second solid-state light source, a second collimating lens disposed in an optical path of the second light between the projection lens and the second reflector, a second liquid crystal panel disposed in an optical path of the second light between the projection lens and the second collimating lens, a third reflector disposed in an optical path of the third light between the projection lens and the third solid-state light source, a third collimating lens disposed in an optical path of the third light between the projection lens and the third reflector, a third liquid crystal panel disposed in an optical path of the third light between the projection lens and the third collimating lens, and a second liquid crystal panel disposed in an optical path of the third light between the projection lens and the first collimating lens. the first polarizing plate is disposed between the first collimating lens and the first liquid crystal panel, the second polarizing plate is disposed between the second collimating lens and the second liquid crystal panel, and the third polarizing plate is disposed between the third collimating lens and the third liquid crystal panel, and each of the first polarizing plate, the second polarizing plate, and the third polarizing plate is a reflective polarizing plate.

[0164] As a result, because the first incident polarizer is a reflective polarizer, the first light reflected by the first incident polarizer passes through the first collimating lens, returns to the first reflector, is reflected there again, and returns to the first incident polarizer. This increases the utilization efficiency of the first light. Furthermore, because the second incident polarizer is a reflective polarizer, the second light reflected by the second incident polarizer passes through the second collimating lens, returns to the second reflector, is reflected there again, and returns to the second incident polarizer. This increases the utilization efficiency of the second light. Furthermore, because the third incident polarizer is a reflective polarizer, the third light reflected by the third incident polarizer passes through the third collimating lens, returns to the third reflector, is reflected there again, and returns to the third incident polarizer. This increases the utilization efficiency of the third light.

[0165] (Supplementary Note 18) A second reflector disposed in an optical path of the second light between the projection lens and the second solid-state light source, a second collimating lens disposed in an optical path of the second light between the projection lens and the second reflector, a second liquid crystal panel disposed in an optical path of the second light between the projection lens and the second collimating lens, a third reflector disposed in an optical path of the third light between the projection lens and the third solid-state light source, a third collimating lens disposed in an optical path of the third light between the projection lens and the third reflector, a third liquid crystal panel disposed in an optical path of the third light between the projection lens and the third collimating lens, and a second liquid crystal panel disposed in an optical path of the third light between the projection lens and the first collimating lens. the first polarizing plate is disposed between the first collimating lens and the first liquid crystal panel, the second polarizing plate is disposed between the second collimating lens and the second liquid crystal panel, and the third polarizing plate is disposed between the third collimating lens and the third liquid crystal panel, and each of the first polarizing plate, the second polarizing plate, and the third polarizing plate is an inorganic polarizing plate.

[0166] As a result, since the first, second, and third input polarizers are inorganic polarizers, deterioration due to heating can be suppressed compared to organic polarizers, and the light intensity of each of the first, second, and third solid-state light sources can be increased. [Explanation of symbols]

[0167] 100...projector, 2...projection unit, 2A...light source unit, 2B...light modulation device, 2C...projection optical system, 21B...blue light source unit, 21G...green light source unit, 21R...red light source unit, 211B...blue solid-state light source (second solid-state light source), 211G...green solid-state light source (first solid-state light source), 211R...red solid-state light source (third solid-state light source), 212G...green phosphor, 213G...substrate (base), 22...reflector, 22B...blue reflector (second reflector), 22G...green reflector (first reflector), 22R...red reflector (third reflector), 221G...incident end, 22 2G...output end, 223G...side member, 224G...reflecting member, 23...parallelizing lens, 23B...blue parallelizing lens (second parallelizing lens), 23G...green parallelizing lens (first parallelizing lens), 23R...red parallelizing lens (third parallelizing lens), 24...liquid crystal panel, 24B...blue liquid crystal panel (second liquid crystal panel), 24G...green liquid crystal panel (first liquid crystal panel), 24R...red liquid crystal panel (third liquid crystal panel), 241...incident polarizer, 241B...blue incident polarizer (second incident polarizer), 241G...green incident polarizer (first incident polarizer), 241R...red incident polarizer (third 3 input polarizer), 242... output polarizer, 242B... blue output polarizer (second output polarizer), 242G... green output polarizer (first output polarizer), 242R... red output polarizer (third output polarizer), 243G... green input substrate (largest area), 244G... green output substrate (largest area), 245G... green liquid crystal layer (liquid crystal layer), 246G... first microlens array, 247G... first microlens, 248G... output glass substrate (output substrate), 249G... input glass substrate (input substrate), 25... prism, 251, 252... reflective film, 253... output surface, 254, 255, 2 56...incident surface, 27...projection lens, 3...inorganic polarizer, 4...drive circuit, 40...internal drive circuit, 41...image display circuit, 411...scanning electrode, 413...signal electrode, 414...transistor, 414F...semiconductor film, 416...pixel electrode, 417...common electrode, 45...sealing member, IB...blue image light (second light), IG...green image light (first light), IR...red image light (third light), IM...image light (first light, second light, third light), LB...blue light (second light), LG...green light (first light), LR...red light (third light), LN...center axis, R4...sealing region, θ1...first angle, θ2...second angle.

Claims

1. a first solid-state light source that emits a first light; a second solid-state light source that emits second light having a wavelength different from that of the first light; a third solid-state light source that emits third light having a wavelength different from that of the first light and the second light; a projection lens that emits the first light, the second light, and the third light; a first reflector disposed in an optical path of the first light between the projection lens and the first solid-state light source; a first collimating lens disposed in an optical path of the first light between the projection lens and the first reflector; a first liquid crystal panel disposed in an optical path of the first light between the projection lens and the first collimating lens; a prism disposed in an optical path of the first light between the projection lens and the first liquid crystal panel, the first liquid crystal panel includes an incident-side substrate onto which the first light is incident, an exit-side substrate from which the first light is emitted, and a first liquid crystal layer sandwiched between the incident-side substrate and the exit-side substrate, the emission side substrate includes: an emission substrate having transparency and having an emission surface from which the first light is emitted; a plurality of scanning electrodes formed on the emission substrate; a plurality of signal electrodes formed on the emission substrate and intersecting with each of the plurality of scanning electrodes; a plurality of pixel electrodes formed on the emission substrate and adjacent to one of intersections at which the plurality of scanning electrodes intersect with the plurality of signal electrodes; and a plurality of transistors formed on the emission substrate and electrically connected to one of the plurality of pixel electrodes and electrically connected to one of the plurality of signal electrodes, the incident-side substrate includes: an incident substrate having light-transmitting properties and having an incident surface onto which the first light is incident; a common electrode formed on the incident substrate and disposed so as to face the plurality of pixel electrodes with the first liquid crystal layer interposed therebetween, the common electrode applying a voltage to the first liquid crystal layer; and a plurality of first microlenses formed on the incident substrate; each of the plurality of first microlenses focuses the first light toward a corresponding one of the plurality of pixel electrodes; a first angle, which is an angle that the first light having passed through the first collimating lens makes with a normal to the incident surface of the first liquid crystal panel, is smaller than a second angle, which is an angle that the first light having passed through the first reflector and before passing through the first collimating lens makes with a normal to the incident surface of the first liquid crystal panel; projector.

2. the plurality of scanning electrodes apply voltages to corresponding gates of each of the plurality of transistors; the plurality of signal electrodes input signals to corresponding sources of the plurality of transistors; When each of the plurality of pixel electrodes is electrically connected to a drain of a corresponding one of the plurality of transistors, When the first liquid crystal panel is viewed in a plane in a normal direction of the first liquid crystal panel, at least a portion of a semiconductor film constituting the plurality of transistors is covered by a corresponding one of the plurality of signal electrodes, and a gate of each of the plurality of transistors is arranged to overlap a region where a corresponding one of the plurality of signal electrodes and a corresponding one of the plurality of scanning electrodes intersect. The projector according to claim 1 .

3. a second microlens is disposed on the emission substrate downstream of the first microlens in the optical path of the first light, and the second microlens diffuses the first light collected by the first microlens; The projector according to claim 1 .

4. a first solid-state light source that emits a first light; a second solid-state light source that emits second light having a wavelength different from that of the first light; a third solid-state light source that emits third light having a wavelength different from that of the first light and the second light; a projection lens that emits the first light, the second light, and the third light; a first reflector disposed in an optical path of the first light between the projection lens and the first solid-state light source; a first collimating lens disposed in an optical path of the first light between the projection lens and the first reflector; a first liquid crystal panel disposed in an optical path of the first light between the projection lens and the first collimating lens; a prism disposed in an optical path of the first light between the projection lens and the first liquid crystal panel, the first liquid crystal panel includes an incident-side substrate onto which the first light is incident, an exit-side substrate from which the first light is emitted, and a first liquid crystal layer sandwiched between the incident-side substrate and the exit-side substrate, the incident-side substrate includes: an incident substrate having light-transmitting properties and having an incident surface on which the first light is incident; a plurality of scanning electrodes formed on the incident substrate; a plurality of signal electrodes formed on the incident substrate and intersecting with each of the plurality of scanning electrodes; a plurality of pixel electrodes formed on the incident substrate and adjacent to any one of intersections at which the plurality of scanning electrodes and the plurality of signal electrodes intersect; a plurality of transistors formed on the incident substrate and electrically connected to any one of the plurality of pixel electrodes and electrically connected to any one of the plurality of signal electrodes; and a plurality of first microlenses formed on the incident substrate, the emission-side substrate includes: an emission substrate having light-transmitting properties and having an emission surface from which the first light is emitted; and a common electrode formed on the emission substrate, arranged to face the plurality of pixel electrodes with the first liquid crystal layer interposed therebetween, and capable of applying a voltage to the first liquid crystal layer; each of the plurality of first microlenses focuses the first light toward a corresponding one of the plurality of pixel electrodes; a first angle, which is an angle that the first light having passed through the first collimating lens makes with a normal to the incident surface of the first liquid crystal panel, is smaller than a second angle, which is an angle that the first light having passed through the first reflector and before passing through the first collimating lens makes with a normal to the incident surface of the first liquid crystal panel; projector.

5. the plurality of scanning electrodes apply voltages to corresponding gates of each of the plurality of transistors; the plurality of signal electrodes input signals to corresponding sources of the plurality of transistors; When each of the plurality of pixel electrodes is electrically connected to a drain of a corresponding one of the plurality of transistors, When the first liquid crystal panel is viewed in a plane in a normal direction of the first liquid crystal panel, at least a portion of a semiconductor film constituting the plurality of transistors is covered by a corresponding one of the plurality of signal electrodes, and a gate of each of the plurality of transistors is arranged to overlap a region where a corresponding one of the plurality of signal electrodes and a corresponding one of the plurality of scanning electrodes intersect. The projector according to claim 4 .

6. a second microlens is disposed on the emission substrate downstream of the first microlens in the optical path of the first light, and the second microlens diffuses the first light collected by the first microlens; The projector according to claim 4 .

7. an area of ​​the first light emitted from the first collimating lens is equal to or larger than an area of ​​a region in which the first liquid crystal layer is disposed when the first liquid crystal panel is viewed from a normal direction of the incident surface through which the first light is incident on the first liquid crystal panel; The projector according to claim 1 .

8. an area through which the first light is emitted from the first collimating lens is a region in which the first liquid crystal layer is disposed when the first liquid crystal panel is viewed from a normal direction of the incident surface of the first liquid crystal panel into which the first light is incident, and is equal to or larger than an area where the plurality of pixel electrodes and the plurality of first microlenses overlap, and is smaller than an area of ​​a maximum region in which the first liquid crystal layer is disposed; The projector according to claim 1 .

9. an end of the first reflector that contacts the first parallelizing lens has a rectangular shape; When the first liquid crystal panel is viewed from a normal direction of the incident surface of the first liquid crystal panel onto which the first light is incident, a shape of a region in which the first liquid crystal layer is disposed is rectangular. The projector according to claim 8 .

10. The end of the first reflector has a rectangular shape, The shape of the area on the incident surface of the first liquid crystal panel is rectangular, an aspect ratio of the end portion of the first reflector is equal to an aspect ratio of the region of the incident surface of the first liquid crystal panel; The projector according to claim 9.

11. an area where the first light enters the first collimating lens is equal to an area where the first light exits the first collimating lens; The projector according to claim 10.

12. a second reflector disposed in an optical path of the second light between the projection lens and the second solid-state light source; a second collimating lens disposed in an optical path of the second light between the projection lens and the second reflector; a second liquid crystal panel disposed in an optical path of the second light between the projection lens and the second collimating lens; a third reflector disposed in an optical path of the third light between the projection lens and the third solid-state light source; a third collimating lens disposed on an optical path of the third light between the projection lens and the third reflector; a third liquid crystal panel disposed on an optical path of the third light between the projection lens and the third parallelizing lens; Equipped with the second liquid crystal panel includes a second liquid crystal layer; the third liquid crystal panel includes a third liquid crystal layer; an end of the first reflector that contacts the first parallelizing lens has a rectangular shape; an end portion of the second reflector that contacts the second parallelizing lens has a rectangular shape; an end portion of the third reflector that contacts the third parallelizing lens has a rectangular shape; when the first liquid crystal panel is viewed in a direction normal to an incident surface of the first liquid crystal panel onto which the first light is incident, a shape of a region in which the first liquid crystal layer is disposed is rectangular, when the second liquid crystal panel is viewed in a direction normal to an incident surface of the second liquid crystal panel onto which the second light is incident, a shape of a region in which the second liquid crystal layer is disposed is rectangular, When the third liquid crystal panel is viewed in a direction normal to an incident surface of the third liquid crystal panel onto which the third light is incident, a shape of a region in which the third liquid crystal layer is disposed is rectangular. The projector according to claim 1 .

13. the shape of the end of the first reflector, the shape of the end of the second reflector, and the shape of the end of the third reflector are each rectangular; the shape of the area on the incident surface of the first liquid crystal panel, the shape of the area on the incident surface of the second liquid crystal panel, and the shape of the area on the incident surface of the third liquid crystal panel are each rectangular; an aspect ratio of the end portion of the first reflector is equal to an aspect ratio of the region of the incident surface of the first liquid crystal panel; an aspect ratio of the end portion of the second reflector is equal to an aspect ratio of the region of the incident surface of the second liquid crystal panel; an aspect ratio of the end portion of the third reflector is equal to an aspect ratio of the region of the incident surface of the third liquid crystal panel; The projector according to claim 12.

14. an area of ​​the end portion of the first reflector is equal to or larger than an area of ​​the region of the incident surface of the first liquid crystal panel; an area of ​​the end portion of the second reflector is equal to or larger than an area of ​​the region of the incident surface of the second liquid crystal panel; an area of ​​the end portion of the third reflector is equal to or larger than an area of ​​the region of the incident surface of the third liquid crystal panel; The projector according to claim 13.

15. a second reflector disposed in an optical path of the second light between the projection lens and the second solid-state light source; a second collimating lens disposed in an optical path of the second light between the projection lens and the second reflector; a second liquid crystal panel disposed in an optical path of the second light between the projection lens and the second collimating lens; a third reflector disposed in an optical path of the third light between the projection lens and the third solid-state light source; a third collimating lens disposed on an optical path of the third light between the projection lens and the third reflector; a third liquid crystal panel disposed on an optical path of the third light between the projection lens and the third parallelizing lens; Equipped with each of the first solid-state light source, the second solid-state light source, and the third solid-state light source includes a base and a plurality of LEDs arranged on the base; the first reflector shapes the first light emitted from the first solid-state light source into a rectangular shape; the second reflector shapes the second light emitted from the second solid-state light source into a rectangular shape; The third reflector shapes the third light emitted from the third solid-state light source into a rectangular shape. The projector according to claim 1 .

16. a second reflector disposed in an optical path of the second light between the projection lens and the second solid-state light source; a second collimating lens disposed in an optical path of the second light between the projection lens and the second reflector; a second liquid crystal panel disposed in an optical path of the second light between the projection lens and the second collimating lens; a third reflector disposed in an optical path of the third light between the projection lens and the third solid-state light source; a third collimating lens disposed on an optical path of the third light between the projection lens and the third reflector; a third liquid crystal panel disposed on an optical path of the third light between the projection lens and the third parallelizing lens; Equipped with each of the first solid-state light source, the second solid-state light source, and the third solid-state light source includes a base and a plurality of laser diodes arranged on the base; the first reflector shapes the first light emitted from the first solid-state light source into a rectangular shape; the second reflector shapes the second light emitted from the second solid-state light source into a rectangular shape; The third reflector shapes the third light emitted from the third solid-state light source into a rectangular shape. The projector according to claim 1 .

17. a second reflector disposed in an optical path of the second light between the projection lens and the second solid-state light source; a second collimating lens disposed in an optical path of the second light between the projection lens and the second reflector; a second liquid crystal panel disposed in an optical path of the second light between the projection lens and the second collimating lens; a third reflector disposed in an optical path of the third light between the projection lens and the third solid-state light source; a third collimating lens disposed on an optical path of the third light between the projection lens and the third reflector; a third liquid crystal panel disposed on an optical path of the third light between the projection lens and the third parallelizing lens; a first polarizing plate disposed in an optical path of the first light between the projection lens and the first collimating lens; a second polarizing plate disposed in an optical path of the second light between the projection lens and the second collimating lens; a third polarizing plate disposed in an optical path of the third light between the projection lens and the third collimating lens, the first polarizing plate is disposed between the first parallelizing lens and the first liquid crystal panel; the second polarizing plate is disposed between the second parallelizing lens and the second liquid crystal panel, the third polarizing plate is disposed between the third parallelizing lens and the third liquid crystal panel, each of the first polarizing plate, the second polarizing plate, and the third polarizing plate is a reflective polarizing plate; The projector according to claim 1 .

18. a second reflector disposed in an optical path of the second light between the projection lens and the second solid-state light source; a second collimating lens disposed in an optical path of the second light between the projection lens and the second reflector; a second liquid crystal panel disposed in an optical path of the second light between the projection lens and the second collimating lens; a third reflector disposed in an optical path of the third light between the projection lens and the third solid-state light source; a third collimating lens disposed on an optical path of the third light between the projection lens and the third reflector; a third liquid crystal panel disposed on an optical path of the third light between the projection lens and the third parallelizing lens; a first polarizing plate disposed in an optical path of the first light between the projection lens and the first collimating lens; a second polarizing plate disposed in an optical path of the second light between the projection lens and the second collimating lens; a third polarizing plate disposed in an optical path of the third light between the projection lens and the third collimating lens, the first polarizing plate is disposed between the first parallelizing lens and the first liquid crystal panel; the second polarizing plate is disposed between the second parallelizing lens and the second liquid crystal panel, the third polarizing plate is disposed between the third parallelizing lens and the third liquid crystal panel, each of the first polarizing plate, the second polarizing plate, and the third polarizing plate is an inorganic polarizing plate; The projector according to claim 1 .

Images