Projector

Abstract

Provided is a projector. And the utilization efficiency of light is improved. A projector (100) includes a green liquid crystal panel (24G) having a green incidence side substrate (243G), the green incidence side substrate including an incidence glass substrate (249G), a common electrode (417), and a plurality of first microlenses (247G) formed on the incidence glass substrate, each of the plurality of first microlenses condensing green light (LG) toward a corresponding one of a plurality of pixel electrodes (416). The first angle ([theta] 1) is smaller than the second angle ([theta] 2), and the first angle ([theta] 1) is an angle formed by green light passing through the green parallelizing lens (23G) with respect to a normal line at the incident surface of the green liquid crystal panel. The second angle ([theta] 2) is an angle formed by green light (LG), which has passed through the green reflector (22G) and before passing through the green parallelizing lens (23G), with respect to a normal line at the incident surface of the green liquid crystal panel (24G).

Description

Technical Field

[0001] This utility model relates to a projector. Background Technology

[0002] Previously, there were projectors that used a single liquid crystal panel as a light modulation element, known as "single-panel projectors" (see Patent Document 1). In Patent Document 1, an LED that emits unpolarized light was used as the light source.

[0003] Patent Document 1: Chinese Utility Model Announcement No. 212515320

[0004] In the "single-panel projector" described in Patent Document 1, the light emitted by the light source has poor utilization efficiency, resulting in the following problem: light is absorbed and heat is generated inside the projector, which accelerates the deterioration of the projector.

[0005] For example, the patent document uses a single liquid crystal panel. In this case, a color filter is used, for example, to represent R (red), G (green), and B (blue). The color filter heats up and deteriorates due to light absorption. Therefore, as the brightness of the light source increases, the deterioration of the color filter is accelerated, and the product life of the projector is shortened.

[0006] Therefore, a projector with the following structure is provided: it improves the efficiency of light utilization, and even when the brightness of the light source is increased, it suppresses the deterioration of the internal components of the projector and extends the product life. Utility Model Content

[0007] One aspect of this disclosure is a projector comprising: a first solid-state light source emitting a first light; a second solid-state light source emitting a second light with a wavelength different from the first light; a third solid-state light source emitting a third light with a wavelength different from both the first and second light; a projection lens emitting the first, second, and third light; a first reflector disposed between the projection lens and the first solid-state light source in the optical path of the first light; a first parallelizing lens disposed between the projection lens and the first reflector in the optical path of the first light; and a first liquid crystal panel disposed between the projection lens and the first solid-state light source. The first light is incident on the optical path between the parallelizing lenses; and a prism is disposed on the 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 to which the first light is incident; an exit-side substrate to 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 includes: an exit substrate having light transmittance and an exit surface for emitting the first light; a plurality of scanning electrodes formed on the exit substrate; and a plurality of signal electrodes formed on the exit substrate and connected to the plurality of scanning electrodes. The scanning electrodes intersect; a plurality of pixel electrodes are formed on the emission substrate and adjacent to any one of the intersection points of the plurality of scanning electrodes and the plurality of signal electrodes; and a plurality of transistors are formed on the emission substrate and are electrically connected to any one of the plurality of pixel electrodes and to any one of the plurality of signal electrodes. The incident side substrate includes: an incident substrate that is transparent and has an incident surface for the first light to be incident; a common electrode formed on the incident substrate and separated from the plurality of pixel electrodes by the first liquid crystal layer. The first liquid crystal layer is configured with pixel electrodes facing each other and a voltage is applied to the first pixel electrode; and a plurality of first microlenses are formed on the incident substrate, the plurality of first microlenses focusing the first light toward a corresponding pixel electrode among the plurality of pixel electrodes, the first angle being smaller than the second angle, the first angle being the angle formed by the first light passing through the first parallel lens with respect to the normal at the incident surface of the first liquid crystal panel, the second angle being the angle formed by the first light passing through the first reflector and before the first parallel lens with respect to the normal at the incident surface of the first liquid crystal panel. Attached Figure Description

[0008] Figure 1 This is a diagram illustrating an example of the structure of the projector according to this embodiment.

[0009] Figure 2 This is a diagram showing an example of the structure of the projection section of a projector.

[0010] Figure 3 This is a diagram illustrating an example of the structure of a green reflector.

[0011] Figure 4 This is a diagram showing the direction of light travel before and after passing through the green parallelization lens.

[0012] Figure 5 This is a diagram showing an example of the structure of the green light source and the green incident polarizer.

[0013] Figure 6 This is a diagram illustrating an example of the structure of an inorganic polarizing plate.

[0014] Figure 7 This is a cross-sectional view showing an example of the structure of a green liquid crystal panel containing microlenses.

[0015] Figure 8 This is a diagram showing an example of a drive circuit.

[0016] Figure 9 This is a diagram illustrating an example of the configuration of transistors in a drive circuit.

[0017] Figure 10 This is a perspective view showing an example of the structure of a green reflector.

[0018] Figure 11 This is a diagram showing an example of a sealed area of ​​liquid crystal in a green LCD panel.

[0019] Label Explanation

[0020] 100: Projector; 2: Projection section; 2A: Light source section; 2B: Light modulation device; 2C: Projection optical system; 21B: Blue light source section; 21G: Green light source section; 21R: Red light source section; 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: Receiver end; 222G: Receiver end; 223 G: Side component; 224G: Reflective component; 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 incident polarizer); 24 2: Exit polarizer; 242B: Blue exit polarizer (second exit polarizer); 242G: Green exit polarizer (first exit polarizer); 242R: Red exit polarizer (third exit polarizer); 243G: Green incident-side substrate (maximum area); 244G: Green exit-side substrate (maximum area); 245G: Green liquid crystal layer (liquid crystal layer); 246G: First microlens array; 247G: First microlens; 248G: Exit glass substrate (exit matrix); 249G: Incident glass substrate (incident matrix); 25: Prism; 251, 252: Reflective film; 253: Exit surface; 254, 255, 256: Incident surface; 27 1: Projection lens; 2: Inorganic polarizing plate; 3: Driving circuit; 40: Internal driving circuit; 41: Image display circuit; 411: Scanning electrode; 413: Signal electrode; 414: Transistor; 414F: Semiconductor film; 416: Pixel electrode; 417: Common electrode; 45: Sealing component; 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: Central axis; R4: Sealing area; θ1: First angle; θ2: Second angle. Detailed Implementation

[0021] Hereinafter, this embodiment will be described with reference to the accompanying drawings.

[0022] First, refer to Figure 1 The structure of the projector 100 according to this embodiment will be described. Figure 1 This is a diagram illustrating an example of the structure of the projector 100 according to this embodiment.

[0023] like Figure 1 As shown, the projector 100 includes a projection unit 2 and a drive unit 120 for driving the projection unit 2.

[0024] The projection unit 2 forms an optical image and projects image light PL onto the screen SC. The projection unit 2 projects image light PL corresponding to the projected image PM onto the screen SC. In addition, the projection unit 2 projects image light PL so that the projected image PM is formed on the screen SC.

[0025] The projection unit 2 includes a light source unit 2A, a light modulation device 2B, and a projection optical system 2C. The driving unit 120 includes a light source driving unit 121 and a light modulation device driving unit 122.

[0026] The light source unit 2A includes a solid-state light source 211, a reflector 22, and a parallelizing lens 23.

[0027] Solid-state light sources 211 are, for example, composed of LEDs (Light Emitting Diodes).

[0028] Reflector 22 guides the light emitted from solid-state light source 211 to parallelizing lens 23.

[0029] The light emitted from the solid-state light source 211 is incident on the parallelizing lens 23 via the reflector 22. The parallelizing lens 23 makes the light nearly parallel before it is emitted into the liquid crystal panel 24.

[0030] The light source drive unit 121 is connected to the internal bus 107. According to the instructions of the control unit 150, which is also connected to the internal bus 107, the solid-state light source 211 of the light source unit 2A is turned on and off, and the output of the solid-state light source 211 is controlled.

[0031] The light modulation device 2B has a liquid crystal panel 24 and a prism 25.

[0032] The liquid crystal panel 24 is a transmissive liquid crystal panel that modulates the transmitted light to generate image light PL. The image light PL modulated by the liquid crystal panel 24 is combined by the prism 25 and emitted into the projection optical system 2C.

[0033] The optical modulation device 2B is driven by the optical modulation device drive unit 122. The optical modulation device drive unit 122 is connected to the image processing unit 145.

[0034] Image data is input from the image processing unit 145 to the light modulation device driving unit 122. The light modulation device driving unit 122 converts the input image data into data signals suitable for the operation of the liquid crystal panel 24. Based on the converted data signals, the light modulation device driving unit 122 applies voltage to each pixel of the liquid crystal panel 24 and draws an image on the liquid crystal panel 24.

[0035] The projection optical system 2C includes a projection lens 27 that images the incident image light PL onto the screen SC. Additionally, the projection optical system 2C includes a zoom mechanism for magnifying or reducing the image projected onto the screen SC, a focus adjustment mechanism for adjusting focus, and a lens shifting mechanism for adjusting the projection direction of the image light PL.

[0036] Regarding projection section 2, please refer to... Figure 2 - Figure 11 Further explanation is needed.

[0037] The projector 100 also includes an operation unit 131, a remote control light 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, storage unit 137, communication interface 141, image processing unit 145, and control unit 150 are connected to each other via an internal bus 107 in a manner that enables data communication.

[0038] The operation unit 131 includes various buttons and switches provided on the surface of the projector 100 housing, and generates operation signals corresponding to the operation of these buttons and switches and outputs them to the input interface 135. The input interface 135 includes circuitry that outputs operation signals input from the operation unit 131 to the control unit 150.

[0039] The remote control's light-receiving unit 133 receives infrared signals sent from the remote control 5 and decodes the received infrared signals to generate an operation signal. The remote control's light-receiving unit 133 outputs the generated operation signal to the input interface 135. The input interface 135 has circuitry for outputting the operation signal input from the remote control's light-receiving unit 133 to the control unit 150.

[0040] Storage unit 137 is, for example, a magnetic recording device such as an HDD (Hard Disk Drive), or a storage device using semiconductor storage elements such as flash memory or an SSD (Solid State Drive). Storage unit 137 stores programs executed by control unit 150, data processed by control unit 150, and image data, etc.

[0041] Communication interface 141 is a communication interface that communicates with personal computer 200 according to, for example, the USB (Universal Serial Bus) standard. Communication interface 141 includes a connector for connecting a USB cable and interface circuitry for processing signals transmitted in the connector.

[0042] The communication interface 141 receives, for example, image data from the personal computer 200. The image data corresponds to the projected image PM projected onto the screen SC by the projection unit 2.

[0043] The control unit 150 controls various parts of the projector 100. The control unit 150 includes a processor 150A and a memory 150B. The memory 150B stores control programs. The processor 150A controls various parts of the projector 100 by reading from the memory 150B and executing the control programs.

[0044] The memory 150B is a storage device that non-volatilely stores the programs and data executed by the processor 150A.

[0045] The processor 150A can be composed of a single processor or multiple processors that function as the processor 150A.

[0046] The image processing unit 145 and the frame memory 143 can be constructed, for example, by integrated circuits. Integrated circuits include LSI (Large-Scale Integration), ASIC (Application Specific Integrated Circuit), and PLD (Programmable Logic Device). PLDs include, for example, FPGA (Field-Programmable Gate Array).

[0047] The image processing unit 145 expands the image data corresponding to the projected image PM in the frame memory 143. The frame memory 143 has multiple memory banks. Each memory bank has a storage capacity capable of writing one frame of image data. The frame memory 143 is, for example, constructed of SDRAM (Synchronous Dynamic Random Access Memory).

[0048] The image processing unit 145 performs image processing on the image data expanded in the frame memory 143, such as resolution conversion processing or size adjustment processing, distortion and aberration correction, shape correction processing, digital zoom processing, and adjustment of image tone and brightness.

[0049] Next, refer to Figure 2 The structure of the projection section 2 of the projector 100 will be described. Figure 2 This is a diagram showing an example of the structure of the projection section 2 of the projector 100.

[0050] exist Figure 2 The graph displays the X, Y, and Z axes. The X, Y, and Z axes are perpendicular to each other. The X and Y axes 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; a positive X axis indicates the right, and a negative X axis indicates the left. The Y axis is parallel to the front-back direction; a positive Y axis indicates the front, and a negative Y axis indicates the back. The positive Z axis indicates the top, and a negative Z axis indicates the bottom.

[0051] in addition, Figure 2 The X-axis, Y-axis, and Z-axis shown are also recorded in [the relevant data]. Figure 3 - Figure 7 as well as Figure 10 - Figure 11 .

[0052] like Figure 2 As shown, the projector 100 is a projector equipped with three liquid crystal panels 24 as light modulation devices 2B, and is a so-called "three-panel projector".

[0053] First, the main structure and optical path of the projection unit 2 will be explained.

[0054] The projector 100 includes a light source unit 2A, an LCD panel 24, a prism 25, and a projection optical system 2C including a projection lens 27.

[0055] An incident polarizer 241 and an exit polarizer 242 are provided on the liquid crystal panel 24.

[0056] The light source unit 2A includes a red light source unit 21R, a green light source unit 21G, and a blue light source unit 21B.

[0057] The red light source unit 21R is positioned to the right of the prism 25, i.e., in the positive direction of the X-axis. The green light source unit 21G is positioned behind the prism 25, i.e., in the negative direction of the Y-axis. The blue light source unit 21B is positioned to the left of the prism 25, i.e., in the negative direction of the X-axis.

[0058] The LCD panel 24 includes a red LCD panel 24R, a green LCD panel 24G, and a blue LCD panel 24B.

[0059] A red liquid crystal panel 24R is positioned between a red light source 21R and a prism 25. Red light LR is emitted from the red light source 21R in the negative X-axis direction and incident on the red liquid crystal panel 24R. The red liquid crystal panel 24R modulates the red light LR incident from the red light source 21R using the red component of the image data to generate red image light IR. Then, the red liquid crystal panel 24R emits the red image light IR towards the prism 25 in the negative X-axis direction.

[0060] A green liquid crystal panel 24G is disposed between a green light source unit 21G and a prism 25. Green light LG is emitted from the green light source unit 21G in the forward direction (positive Y-axis) and 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 using the green component of the image data to generate green image light IG. Then, the green liquid crystal panel 24G emits the green image light IG forward (positive Y-axis) toward the prism 25.

[0061] A blue liquid crystal panel 24B is disposed between a blue light source unit 21B and a prism 25. Blue light LB is emitted from the blue light source unit 21B in the positive X-axis direction to the right and enters the blue liquid crystal panel 24B. The blue liquid crystal panel 24B modulates the blue light LB using the blue component of the image data to generate blue image light IB. Then, the blue liquid crystal panel 24B emits the blue image light IB towards the prism 25 in the positive X-axis direction to the right.

[0062] Prism 25 combines the red image light IR from the red LCD panel 24R, the green image light IG from the green LCD panel 24G, and the blue image light IB from the blue LCD panel 24B, and emits full-color image light IM forward.

[0063] The prism 25 has an incident surface 254, an incident surface 255 and an incident surface 256, a reflective film 251 and a reflective film 252, and an exit surface 253.

[0064] Incident surface 254 is opposite to blue LCD panel 24B. Blue image light IB is incident from blue LCD panel 24B onto incident surface 254. Incident surface 255 is opposite to green LCD panel 24G. Green image light IG is incident from green LCD panel 24G onto incident surface 255. Incident surface 256 is opposite to red LCD panel 24R. Red image light IR is incident from red LCD panel 24R onto incident surface 256.

[0065] Reflective film 251 allows blue image light IB and green image light IG to pass through, and reflects red image light IR. Reflective film 252 allows red image light IR and green image light IG to pass through, and reflects blue image light IB.

[0066] The blue image light IB is incident on the prism 25 from the incident surface 254 in the right direction, i.e., the positive X-axis direction. Then, the blue image light IB passes through the reflective film 251 and is reflected by the reflective film 252. The reflected light of the blue image light IB, reflected by the reflective film 252, exits from the exit surface 253 in the forward direction, i.e., the positive Y-axis direction.

[0067] Green image light IG is incident on prism 25 from incident surface 255 in the forward direction, i.e., the positive Y-axis direction. Then, green image light IG passes through reflective film 251 and reflective film 252 and exits from exit surface 253 in the forward direction, i.e., the positive Y-axis direction.

[0068] The red image light IR is incident on the prism 25 from the incident surface 256 in the left direction, i.e., the negative X-axis direction. Then, the red image light IR passes through the reflective film 252 and is reflected by the reflective film 251. The reflected light of the red image light IR, reflected by the reflective film 251, exits from the exit surface 253 in the forward direction, i.e., the positive Y-axis direction.

[0069] Thus, prism 25 combines the blue image light IB, the green image light IG, and the red image light IR, and emits the full-color image light IM forward in the positive direction of the Y-axis.

[0070] The light source unit 2A includes a solid-state light source 211, a reflector 22, and a parallelizing lens 23.

[0071] The red light source unit 21R includes a red solid-state light source 211R, a red reflector 22R, and a red parallel lens 23R. The green light source unit 21G includes a green solid-state light source 211G, a green reflector 22G, and a green parallel lens 23G. The blue light source unit 21B includes a blue solid-state light source 211B, a blue reflector 22B, and a blue parallel lens 23B.

[0072] Additionally, 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 parallelizing lens 23 includes a red parallelizing lens 23R, a green parallelizing lens 23G, and a blue parallelizing lens 23B.

[0073] One of the red light LR, green light LG, and blue light LB corresponds to an example of "Light 1". One of the other two of the red light LR, green light LG, and blue light LB corresponds to an example of "Light 2". In addition, the other one of the other two of the red light LR, green light LG, and blue light LB corresponds to an example of "Light 3".

[0074] In this embodiment, for example, we will describe a case where green light LG corresponds to "first light", blue light LB corresponds to "second light" and red light LR corresponds to "third light".

[0075] In addition, green image light IG and image light IM each correspond to an example of "first light".

[0076] In addition, the blue image light IB and the image light IM each correspond to an example of the "second light".

[0077] In addition, the red image light IR and the image light IM each correspond to an example of the "third light".

[0078] In other words, in this embodiment, "first light" corresponds to green light LG, green image light IG, and image light IM; "second light" corresponds to blue light LB, blue image light IB, and image light IM; and "third light" corresponds to red light LR, red image light IR, and image light IM.

[0079] In this embodiment, for example, the green solid-state light source 211G corresponds to an example of a "first solid-state light source". Additionally, the blue solid-state light source 211B corresponds to an example of a "second solid-state light source". Furthermore, the red solid-state light source 211R corresponds to an example of a "third solid-state light source".

[0080] Furthermore, 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. Additionally, 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.

[0081] In this embodiment, for example, green reflector 22G corresponds to an example of "first reflector", blue reflector 22B corresponds to an example of "second reflector" and red reflector 22R corresponds to an example of "third reflector".

[0082] In addition, in this embodiment, the green parallel lens 23G corresponds to an example of the "first parallel lens", the blue parallel lens 23B corresponds to an example of the "second parallel lens", and the red parallel lens 23R corresponds to an example of the "third parallel lens".

[0083] In this embodiment, for example, the green liquid crystal panel 24G corresponds to an example of "first liquid crystal panel", the blue liquid crystal panel 24B corresponds to an example of "second liquid crystal panel", and the red liquid crystal panel 24R corresponds to an example of "third liquid crystal panel".

[0084] A green incident polarizer 241G and a green exit polarizer 242G are configured in the green LCD panel 24G. A red incident polarizer 241R and a red exit polarizer 242R are configured in the red LCD panel 24R. A blue incident polarizer 241B and a blue exit polarizer 242B are configured in the blue LCD panel 24B.

[0085] In this embodiment, for example, the green incident polarizer 241G corresponds to an example of the "first polarizer", the blue incident polarizer 241B corresponds to an example of the "second polarizer", and the red incident polarizer 241R corresponds to an example of the "third polarizer".

[0086] The red light source unit 21R, the green light source unit 21G, and the blue light source unit 21B have approximately the same structure. Therefore, in the following description, the green light source unit 21G will be mainly described, and the structure of the red light source unit 21R and the blue light source unit 21B will be omitted.

[0087] The green incident polarizer 241G, the red incident polarizer 241R, and the blue incident polarizer 241B have approximately the same structure. Therefore, in the following description, the green incident polarizer 241G will be mainly described, and the structure of the red incident polarizer 241R and the blue incident polarizer 241B will be omitted.

[0088] The green exit polarizer 242G, the red exit polarizer 242R, and the blue exit polarizer 242B have approximately the same structure. Therefore, in the following description, the green exit polarizer 242G will be mainly described, and the structure of the red exit polarizer 242R and the blue exit polarizer 242B will be omitted.

[0089] The green light source section 21G includes a green solid-state light source 211G, a green reflector 22G, and a green parallel lens 23G.

[0090] The green solid-state light source 211G emits green light LG forward, specifically in the positive Y-axis direction. The green solid-state light source 211G is, for example, composed of an LED (Light Emitting Diode). Furthermore, the green solid-state light source 211G can be composed of a single LED or multiple LEDs. When the green solid-state light source 211G is composed of multiple LEDs, the multiple LEDs are arranged along the XZ plane, which includes the X-axis and Z-axis.

[0091] In this embodiment, the case where the green light source unit 21G is composed of an LED will be described, but the green light source unit 21G may also be composed of an LD (Laser Diode).

[0092] Green light LG, for example, has a wavelength of 500nm to 600nm.

[0093] Furthermore, blue light (LB) has a wavelength of, for example, 420 nm to 500 nm. Additionally, red light (LR) has a wavelength of, for example, 610 nm to 700 nm.

[0094] The green solid-state light source 211G is supported on a substrate 213G. The substrate 213G is arranged parallel to the XZ plane, which includes the X-axis and the Z-axis. The green solid-state light source 211G is fixed in the positive Y-axis direction of the substrate 213G.

[0095] The substrate 213G is, for example, made of metal and shaped as a rectangular plate. Heat from the green solid-state light source 211G is transferred to the substrate 213G. The substrate 213G releases the heat transferred from the green solid-state light source 211G into the space around the substrate 213G. In other words, the substrate 213G functions as a heat dissipation component.

[0096] Substrate 213G corresponds to an example of a "base".

[0097] Green reflector 22G is disposed in the optical path of green light LG between projection lens 27 and green solid-state light source 211G. For example, green reflector 22G is disposed adjacent to green solid-state light source 211G in front of green solid-state light source 211G, i.e., in the positive direction of the Y-axis.

[0098] The green reflector 22G is formed in the shape of a hollow rectangular frustum.

[0099] The green reflector 22G has an incident end 221G, an exit end 222G, a side component 223G, and a reflective component 224G.

[0100] The incident end 221G is the rear end of the green reflector 22G, i.e., the end in the negative direction of the Y-axis. The incident end 221G is formed into a roughly rectangular shape. Green light LG emitted by the green solid-state light source 211G is incident on the incident end 221G.

[0101] The emitting end 222G is the front end of the green reflector 22G, i.e., the positive end in the Y-axis direction. The emitting end 222G is formed into a roughly rectangular shape. The green light LG emitted by the green solid-state light source 211G is emitted from the emitting end 222G towards the green parallelizing lens 23G. The emitting end 222G is, for example, in contact with the rear surface of the green parallelizing lens 23G, i.e., the negative surface in the Y-axis direction.

[0102] The side component 223G is made of a transparent material such as optical glass. The side component 223G consists of four plate-shaped components.

[0103] The reflective component 224G is made of materials such as dielectric multilayer films. The reflective component 224G is attached to the inner surface of the side component 223G. The reflective component 224G reflects green light LG.

[0104] In the green reflector 22G, the central axis LN, which is parallel to the front-back direction (i.e., the Y-axis), is positioned perpendicular to the emitting surface of the green solid-state light source 211G. The central axis LN is as follows: Figure 3 and Figure 4 As shown.

[0105] In the green reflector 22G, the area surrounded by the incident end 221G, the exit end 222G and the reflecting component 224G is the area where green light LG propagates.

[0106] Green light LG propagates from the incident end 221G toward the exit end 222G within the aforementioned region, thereby shaping the green light LG into a rectangular shape. As a result, the green light LG incident from the exit end 222G onto the green parallelizing lens 23G is shaped into approximately uniform brightness within the rectangular shape on the inner surface of the exit end 222G.

[0107] Here, refer to Figure 3 The green reflector 22G and the green parallel lens 23G will be further explained. Figure 3 This is a diagram showing an example of the structure of the green reflector 22G.

[0108] The green reflector 22G is, for example, formed as a hollow rectangular frustum shape. In this case, the incident end 221G and the exit end 222G are both rectangular. In this case, the angle α, i.e., the cone angle, formed by the side member 223G and the reflecting member 224G corresponding to the shorter side of the rectangle with respect to the central axis LN and the imaginary axis VX of the green reflector 22G is preferably in the range of 7° to 22°. Furthermore, in Figure 3 In the diagram, the central axis LN is represented by a double-dotted line. The imaginary axis VX is an axis parallel to the central axis LN.

[0109] The angle β, i.e. the cone angle, formed by the side member 223G and the reflective member 224G relative to the central axis LN of the green reflector 22G, corresponding to the long side of the rectangle is preferably in the range of 14° to 36°.

[0110] The preferred ranges for angles α and β were confirmed through numerical simulations based on the structure of the green reflector 22G and ray tracing.

[0111] like Figure 3As shown, a portion of the green light LG incident on the green reflector 22G, Lg1, forms an angle smaller than angles α and β relative to the imaginary axis VX. It does not incident on the reflector 224G at all, but propagates directly from the incident end 221G to the exit end 222G.

[0112] The remaining portion of the green light LG incident on the green reflector 22G, Lg2, forms an angle larger than angles α and β with respect to the imaginary axis VX, and is incident once from the incident end 221G to the reflecting member 224G. In this case, the green light LG reaches the exit end 222G after being reflected by the reflecting member 224G.

[0113] When the remaining portion of the green light LG incident on the green reflector 22G forms an angle larger than that of the light ray Lg2 relative to the imaginary axis VX, it is incident on the reflector 224G more than twice from the incident end 221G. In this case, the green light LG reaches the exit end 222G after being reflected more than twice by the reflector 224G.

[0114] The path of the green light LG in the area surrounded by the incident end 221G, the exit end 222G and the reflecting component 224G varies depending on the angle with respect to the central axis LN, and sometimes the number of reflections at the reflecting component 224G may also be different.

[0115] Thus, by propagating within the region surrounded by the incident end 221G, the exit end 222G, and the reflecting component 224G, the brightness distribution of the green light LG is homogenized in the XZ plane, which includes the X-axis and Z-axis directions. That is, the green reflector 22G homogenizes the brightness distribution of the incident green light LG in the XZ plane, which includes the X-axis and Z-axis directions. The green light LG, with its brightness distribution homogenized, is emitted forward from the exit end 222G in the positive Y-axis direction.

[0116] exist Figure 3 In the diagram, the composite vector VG is represented by a dashed line. The composite vector VG is generated by combining the vectors representing light ray Lg1 and Lg2. The point where the line obtained by extending the composite vector VG backward (in the negative Y-axis direction) intersects the central axis LN of the green reflector 22G and the green parallel lens 23G coincides with the position of the focal point F2 of the green parallel lens 23G.

[0117] Regarding the green reflector 22G, please refer to... Figure 10 Further explanation is needed.

[0118] The focal length f2 of the green parallel lens 23G is longer than the distance g2 between the incident end 221G and the exit end 222G of the green reflector 22G. The distance g2 corresponds to the length of the green reflector 22G in the Y-axis direction.

[0119] The focal length f2 is more preferably 1.1 times or more and 2.0 times or less than the distance g2. By setting the focal length f2 within this range, the green light LG emitted from the green solid-state light source 211G is efficiently parallelized, and the utilization efficiency of the green light LG is improved. The above-mentioned preferred range of focal length f2 was confirmed by numerical simulation based on the structure of the green light source unit 21G and ray tracing.

[0120] Return to Figure 2 The structure of the projection section 2 will be explained.

[0121] A green parallelizing lens 23G is disposed in the optical path of the green light LG between the projection lens 27 and the green reflector 22G. For example, the green parallelizing lens 23G is disposed in front of the exit end 222G of the green reflector 22G, i.e., in the positive Y-axis direction. Furthermore, the green parallelizing lens 23G parallelizes the green light LG emitted from the green reflector 22G along the positive Y-axis direction.

[0122] The green parallel lens 23G is, for example, a plano-convex lens, having an incident surface and an exit surface. The incident surface is, for example, formed as a plane parallel to the XZ plane, which is perpendicular to the positive direction of the Y-axis. The exit surface is composed of a convex curved surface that protrudes forward, i.e., in the positive direction of the Y-axis.

[0123] In addition, the area of ​​the incident surface of the green light LG from the green reflector 22G to the green parallel lens 23G is equal to the area of ​​the green light LG exiting from the exit surface of the green parallel lens 23G.

[0124] The incident surface of the green parallelizing lens 23G is configured, for example, to be connected to the exit end 222G of the green reflector 22G. By configuring the green parallelizing lens 23G in this way, the green light LG emitted from the exit end 222G of the green reflector 22G is efficiently incident on the green parallelizing lens 23G. Therefore, the loss of green light LG can be suppressed.

[0125] In this embodiment, the case where the green parallel lens 23G is a plano-convex lens will be described, but the green parallel lens 23G can also be other optical lenses, such as Fresnel lenses.

[0126] In addition, in this embodiment, the case where the green parallel lens 23G is connected to the emission end 222G of the green reflector 22G will be described, but the green parallel lens 23G may also be configured separately from the emission end 222G of the green reflector 22G.

[0127] Next, refer to Figure 4 The green parallel lens 23G will be further explained. Figure 4 This is a diagram showing the direction of light travel before and after passing through the green parallel lens 23G.

[0128] like Figure 4 As shown, the first angle θ1 is less than the second angle θ2.

[0129] The first angle θ1 is the angle formed by the green light LG passing through the green parallelizing lens 23G relative to the normal at the incident surface of the green liquid crystal panel 24G. The normal at 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 formed by the green light LG passing through the green parallelizing lens 23G relative to the central axis LN. The first angle θ1 is approximately zero degrees.

[0130] The second angle θ2 is the angle formed by the green light LG passing through the green reflector 22G and the green parallelizing lens 23G relative to the normal at the incident surface of the green liquid crystal panel 24G. The normal at 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 formed by the green light LG passing through the green reflector 22G and the green parallelizing lens 23G relative to the central axis LN.

[0131] exist Figure 4 In the diagram, a solid line vector represents the direction of travel of green light LG passing through green parallel lens 23G, and a dashed line vector represents the direction of travel of green light LG passing through green reflector 22G and before passing through green parallel lens 23G.

[0132] Thus, by using the green parallelization lens 23G, the incident angle of the light incident on the green liquid crystal panel 24G can be made close to zero degrees, thereby suppressing the diffusion of green light LG and improving the utilization efficiency of green light LG.

[0133] Return to Figure 2 The structure of the projection section 2 will be explained.

[0134] A green incident polarizer 241G is disposed in the optical path of the green light LG between the projection lens 27 and the green parallelizing lens 23G. For example, the green incident polarizer 241G is disposed between the green parallelizing lens 23G and the green liquid crystal panel 24G. For example, the green incident polarizer 241G is disposed behind the green liquid crystal panel 24G, i.e., in the negative direction of the Y-axis, and is configured to be in contact with the green liquid crystal panel 24G.

[0135] In this embodiment, the case where the green incident polarizing plate 241G is configured to be connected to the green liquid crystal panel 24G will be described, but the green incident polarizing plate 241G can also be configured to be separate from the green liquid crystal panel 24G.

[0136] Next, refer to Figure 5 Another embodiment of the green solid-state light source 211G and the green incident polarizer 241G will be described.

[0137] First, another embodiment of the green solid-state light source 211G will be described. For example... Figure 5 As shown, the green solid-state light source 211G has a green solid-state light source body 214G and a green phosphor 212G. The green solid-state light source body 214G is composed of an LED that emits green light LG. The green phosphor 212G is disposed in front of the substrate 213G, i.e., on the surface 213G1 in the positive direction of the Y-axis.

[0138] A green phosphor 212G is stacked in front of the green solid-state light source body 214G, on the emitting surface 214G1 in the positive Y-axis direction. The green phosphor 212G is excited by the green light LG emitted from the green solid-state light source body 214G as the excitation light, and emits green light LG from the emitting surface 212G1.

[0139] The type and material of the green solid-state light source 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, 500nm to 600nm.

[0140] In addition, the green solid-state light source body 214G and Figure 2 - Figure 4 Similarly, the green solid-state light source 211G shown can be composed of either a single LED or multiple LEDs. In the case where the green solid-state light source body 214G is composed of multiple LEDs, the multiple LEDs are arranged along the XZ plane.

[0141] The green incident polarizer 241G directs a predetermined polarized light from the green light LG emitted from the green parallelizing lens 23G forward, i.e., in the positive direction of the Y-axis. The predetermined polarized light is, for example, S-polarized light.

[0142] Furthermore, the green incident polarizing plate 241G is formed in the shape of a plate and is arranged parallel to the XZ plane. The green incident polarizing plate 241G is, for example, a reflective polarizing plate. That is, the green incident polarizing plate 241G, for example, emits the S-polarized light from the green light LG incident on the green parallelizing lens 23G in the forward direction, i.e., the positive direction of the Y-axis, and reflects the P-polarized light from the green light LG in the backward direction, i.e., the negative direction of the Y-axis.

[0143] In addition, the green incident polarizing plate 241G is, for example, an inorganic polarizing plate.

[0144] Regarding inorganic polarizing plates, please refer to... Figure 6 Further explanation is needed.

[0145] The green light LG emitted from the green solid-state light source 211G is randomly polarized light containing both P-polarized and S-polarized light. In the following description, the P-polarized light contained in the green light LG emitted from the 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 the green solid-state light source 211G will be referred to as green S-polarized light LGS.

[0146] like Figure 5 As shown, green P-polarized light LGP and green S-polarized light LGS pass through green reflector 22G, thereby homogenizing the brightness distribution in the XZ plane. Then, the green P-polarized light LGP and green S-polarized light LGS, having passed through green reflector 22G, are incident on green parallelizing lens 23G and are parallelized by green parallelizing lens 23G. The parallelized green P-polarized light LGP and green S-polarized light LGS are then incident on green incident polarizing plate 241G.

[0147] Green S-polarized light LGS passes through the green incident polarizer 241G and exits forward, i.e., in the positive Y-axis direction. Green P-polarized light LGP is reflected by the incident surface 241G1 of the green incident polarizer 241G, and the reflected light exits backward, i.e., in the negative Y-axis direction.

[0148] The green P-polarized light LGP, reflected by the green incident polarizer 241G, travels backward (in the negative Y-axis direction), passing sequentially through the green parallelizing lens 23G and the green reflector 22G, before entering the green phosphor 212G. The green P-polarized light LGP, reflected by the green incident polarizer 241G, then enters the green phosphor 212G again, thus re-exciting the phosphor. From the exit surface 212G1, it again emits green light LG, containing both the green P-polarized light LGP and the green S-polarized light LGS, forward (in the positive Y-axis direction).

[0149] The green incident polarizer 241G is a reflective polarizer, thereby allowing polarized light LG that does not pass through the green incident polarizer 241G to be incident on the green phosphor 212G, which helps to excite and emit light from the green phosphor 212G. As a result, the utilization efficiency of the green light LG in the green light source section 21G is improved.

[0150] Next, refer to Figure 6 The inorganic polarizing plate 3 will be explained.

[0151] Figure 6 This is a diagram illustrating an example of the structure of the inorganic polarizing plate 3. (As shown...) Figure 6 As shown, the inorganic polarizing plate 3 includes a substrate 31 and multiple linear structures 30. The substrate 31 is formed into a rectangular plate shape, for example, from a transparent material such as glass. The substrate 31 is arranged parallel to the XZ plane. The substrate 31 supports the multiple linear structures 30.

[0152] Multiple linear structures 30 are formed on the surface behind the substrate 31, i.e., in the negative direction of the Y-axis. The multiple linear structures 30 have a length longer than the wavelength of green light LG and are arranged approximately in parallel with a period P shorter than half the wavelength of green light LG. The multiple linear structures 30 are formed of inorganic material. Each of the multiple linear structures 30 is, for example, constructed by stacking a first layer 301, a second layer 302, a third layer 303, and a fourth layer 304.

[0153] The first layer 301 is formed, for example, of aluminum. The second layer 302 is formed, for example, of silicon dioxide. The third layer 303 is formed, for example, of dielectric materials such as aluminum oxide, silicon nitride, and titanium nitride. The fourth layer 304 is formed, for example, of silicon dioxide.

[0154] Compared to organic polarizing plates that are made by stretching organic materials such as PVA (polyvinyl alcohol) to align the molecular orientation and incorporating iodine, inorganic polarizing plate 3 exhibits superior heat resistance. Therefore, it can improve the brightness of the light source.

[0155] Return to Figure 2 The structure of the projection section 2 will be explained.

[0156] A green liquid crystal panel 24G is disposed in the optical path of the green light LG between the projection lens 27 and the green parallelizing lens 23G. For example, the green liquid crystal panel 24G is disposed between the green parallelizing lens 23G and the prism 25. Furthermore, the green liquid crystal panel 24G is positioned in front of the green incident polarizer 241G, i.e., in the positive direction of the Y-axis.

[0157] S-polarized light from the green light LG is incident on the green liquid crystal panel 24G via a green incident polarizer 241G. The green liquid crystal panel 24G modulates the incident green light LG according to image data to generate green image light IG. Then, the green liquid crystal panel 24G emits the green image light IG.

[0158] A green emission 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 emission polarizer 242G is disposed in front of the green liquid crystal panel 24G, i.e., in the positive direction of the Y-axis. The green emission polarizer 242G is formed in a flat plate shape. The green emission polarizer 242G is disposed parallel to the XZ plane.

[0159] The green exiting polarizer 242G emits predefined polarized light from the green image light IG incident on the green liquid crystal panel 24G in the forward direction, i.e., the positive Y-axis direction. The predefined polarized light is, for example, P-polarized light. The green exiting polarizer 242G can be a reflective or absorptive polarizer.

[0160] In cases where it is desirable to suppress the return light and stray light to the green LCD panel 24G, it is preferable to use an absorptive polarizer as the green outgoing polarizer 242G.

[0161] The green exiting polarizer 242G emits the P-polarized light from the green image light IG incident on the green LCD panel 24G forward, i.e., in the positive direction of the Y-axis, and reflects the other parts of the green image light IG backward, i.e., in the negative direction of the Y-axis.

[0162] Next, refer to Figure 7 The structure of the green liquid crystal panel 24G, which includes the first microlens, will be described. Figure 7 This is a cross-sectional view showing an example of the structure of a green liquid crystal panel 24G including a first microlens. Figure 7 This is a cross-sectional view showing the green LCD panel 24G, parallel to the XY plane.

[0163] like Figure 7 As shown, the green liquid crystal panel 24G includes a green incident-side substrate 243G, a green emission-side substrate 244G, and a green liquid crystal layer 245G. The green liquid crystal layer 245G is composed of liquid crystal sealed into the gap between the green incident-side substrate 243G and the green emission-side substrate 244G.

[0164] The green emission-side substrate 244G includes an emission glass substrate 248G and a driving circuit 4. The emission glass substrate 248G supports the driving circuit 4. On the surface of the green emission-side substrate 244G that is in contact with the green liquid crystal layer 245G, or in other words, the rear surface, a driving circuit 4 is formed to drive the liquid crystal of the green liquid crystal layer 245G. The driving circuit 4 includes a scan electrode 411, a signal electrode 413, a pixel electrode 416, and a transistor 414.

[0165] Regarding driver circuit 4, please refer to... Figure 8 Further explanation is needed.

[0166] 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 is in contact with the green liquid crystal layer 245G, or in other words, the front surface, opposite to the pixel electrode 416.

[0167] The first microlens array 246G is positioned behind the common electrode 417 in the green incident side substrate 243G, i.e., in the negative direction of the Y-axis. Multiple first microlenses 247G are arranged within the first microlens array 246G. Each of the multiple first microlenses 247G is directed toward a corresponding pixel electrode 416 among the multiple pixel electrodes 416, focusing the green light LG.

[0168] The green incident-side substrate 243G and the green exit-side substrate 244G correspond to an example of the "maximum region".

[0169] The first microlens 247G corresponds to an example of "the first microlens".

[0170] The green light LG incident on the green incident side substrate 243G is focused onto the pixel electrode 416 by the first microlens array 246G, and the green image light IG is generated by the green liquid crystal layer 245G and emitted from the green exit side substrate 244G.

[0171] exist Figure 7 In this description, the driving circuit 4 is formed on the exit glass substrate 248G and the common electrode 417 is formed on the incident glass substrate 249G. However, the driving circuit 4 can also be formed on the incident glass substrate 249G and the common electrode 417 on the exit glass substrate 248G. Furthermore, the driving circuit 4 includes a scan electrode 411, a signal electrode 413, a pixel electrode 416, and a transistor 414.

[0172] exist Figure 7 In this paper, the case where the first microlens 247G is disposed on the green incident side substrate 243G is described. However, it is also possible to dispose of the first microlens 247G on the green incident side substrate 243G and the second microlens on the green emission side substrate 244G. The second microlens, for example, diffuses the green light LG focused by the first microlens 247G.

[0173] Next, refer to Figure 8 The driving circuit 4 will be described below. Figure 8 This is a diagram showing an example of drive circuit 4. (As shown) Figure 8 As shown, the driving circuit 4 includes an internal driving circuit 40, a scan line driving circuit 43, and a data line driving circuit 44.

[0174] The internal drive circuit 40 includes an image display circuit 41 and a sampling circuit 42.

[0175] 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.

[0176] The scan line drive circuit 43 applies scan signals Gi (i = 1, 2, ..., m) to the scan electrode 411 in sequence according to the specified timing.

[0177] The data line driving circuit 44 sequentially generates sampling signals Si (i = 1, 2, ..., n) and outputs them to the sampling circuit 42.

[0178] The sampling circuit 42 samples the image signal VID according to the sampling signal Si for each signal electrode 413 and applies data signals Di (i = 1, 2, ..., n) to multiple signal electrodes 413.

[0179] Transistor 414 is, for example, a TFT (Thin Film Transistor). The gate of transistor 414 is connected to scan electrode 411. The source of transistor 414 is connected to signal electrode 413. The drain of transistor 414 is connected to pixel electrode 416.

[0180] A predetermined voltage is applied to the gate of transistor 414 from scan electrode 411, causing transistor 414 to conduct for a certain period of time, thereby writing the data signal Di supplied from signal electrode 413 to pixel electrode 416 at a predetermined time.

[0181] Storage capacitor 415 suppresses leakage of data signal Di written to pixel electrode 416.

[0182] The orientation and order of the liquid crystal molecules in the green liquid crystal layer 245G change according to the voltage level applied to the pixel electrode 416, thereby modulating the green light LG and generating green image light IG.

[0183] For example, in the case of normal white mode, the transmittance relative to green light LG decreases depending on the voltage applied to the pixel electrode 416. On the other hand, in the case of normal black mode, the transmittance relative to incident light increases depending on the voltage applied to the pixel electrode 416.

[0184] Next, refer to Figure 9 The configuration of transistor 414 will be explained. Figure 9 This is a diagram showing an example of the configuration of transistor 414 in drive circuit 4.

[0185] Transistor 414 is formed on semiconductor film 414F. Semiconductor film 414F is formed on signal electrode 413. In semiconductor film 414F, the gate of transistor 414 is formed at the position where scan electrode 411 and signal electrode 413 intersect.

[0186] The source 414S of transistor 414 is connected to the signal electrode 413 via contact hole CHS. The drain 414D of transistor 414 is connected to the connection electrode CF via contact hole CHD. The connection electrode CF is the electrode that connects the drain 414D of transistor 414 to the pixel electrode 416. The pixel electrode 416 is connected to the connection electrode CF via contact hole CHP.

[0187] According to this construction, such as Figure 9 As shown, when the green liquid crystal panel 24G is viewed from the normal direction, a semiconductor film 414F is formed on the signal electrode 413, thus reducing the structure that blocks the green light LG incident on the pixel electrode 416 of the green liquid crystal panel 24G.

[0188] Furthermore, the gate of transistor 414 is formed at the intersection of scan electrode 411 and signal electrode 413. Therefore, the gate of transistor 414 and scan electrode 411 can be connected with a simple structure.

[0189] Next, refer to Figure 10 The structure of the green reflector 22G will be explained. Figure 10 This is a perspective view showing an example of the structure of the green reflector 22G.

[0190] like Figure 10 As shown, the green reflector 22G is formed, for example, in a rectangular frustum shape. In other words, the incident end 221G and the exit end 222G are both formed in a rectangular shape.

[0191] The side component 223G of the green reflector 22G is composed of four plate-shaped components. Each of the four plate-shaped components is trapezoidal. The shorter base of each of the four plate-shaped components forms part of the incident end 221G. The longer base of each of the four plate-shaped components forms part of the exit end 222G.

[0192] The long sides of the incident end 221G and the exit end 222G are parallel to the X-axis. The short sides of the incident end 221G and the exit end 222G are parallel to the Z-axis. The ratio of the length W2 of the long side of the incident end 221G to the length H2 of the short side of the incident end 221G is the same as the ratio of the length W3 of the long side of the exit end 222G to the length H3 of the short side of the exit end 222G.

[0193] In other words, the aspect ratio of the rectangle corresponding to the incident end 221G is the same as that of the rectangle corresponding to the exit end 222G. That is, the green reflector 22G is constructed in such a way that the following equation (1) holds.

[0194] W2:H2=W3:H3(1)

[0195] The area S2 of the rectangle corresponding to the incident end 221G is smaller than the area S3 of the rectangle corresponding to the exit end 222G.

[0196] The area S3 of the rectangle corresponding to the emitting end 222G is the same as the area of ​​the green light LG emitted from the green reflector 22G.

[0197] Area S3 is smaller than the area of ​​the maximum region where the green liquid crystal layer 245G is disposed. The maximum region where the green liquid crystal layer 245G is disposed refers to the area bounded by the sealing member 45 where the green liquid crystal layer 245G is disposed. The "maximum region" corresponds to the green incident side substrate 243G and the green emission side substrate 244G.

[0198] Next, refer to Figure 11 The sealed area of ​​the liquid crystal in the green LCD panel 24G will be explained. Figure 11 This diagram shows an example of the sealed area of ​​the liquid crystal in the green liquid crystal panel 24G. The liquid crystal in the green liquid crystal panel 24G fills the gap between the green incident side substrate 243G and the green emission side substrate 244G, and fills the area sealed by the sealing member 45, namely the sealed area R4.

[0199] The area in the sealed region R4 where the pixel electrode 416 is formed functions as the area for generating green image light IG. Furthermore, even when not all pixel electrodes 416 are present in the sealed region R4, the pixel electrodes 416 disposed within the sealed region R4 function as the area for generating green image light IG.

[0200] The sealing region R4 is formed in a rectangular shape. For example, the sealing region R4 is formed in a rectangular shape. The area S4 of the sealing region R4 is, for example, equal to the area S3 of the rectangle corresponding to the emission end 222G. Alternatively, the area S4 of the sealing region R4 is, for example, smaller than the area S3 of the rectangle corresponding to the emission end 222G.

[0201] Area S4 is, for example, the sealing region R4 where the green liquid crystal layer 245G is configured, and is the area where multiple pixel electrodes 416 overlap with multiple first microlenses 247G.

[0202] The length W4 of the sealing region R4 along the X-axis is greater than the length H4 of the sealing region R4 along the Z-axis. The sealing region R4 is formed as a rectangle. Length W4 is the length of the longer side of the rectangle corresponding to the sealing region R4. Length H4 is the length of the shorter side of the rectangle corresponding to the sealing region R4.

[0203] The sealing area R4 is formed in such a way that the aspect ratio of the rectangle corresponding to the sealing area R4 is consistent with the aspect ratio of the emitting end 222G of the green reflector 22G.

[0204] That is, the sealing region R4 is formed in such a way that the following equation (2) holds.

[0205] W4:H4=W3:H3(2)

[0206] Furthermore, the area of ​​the green light LG emitted from the green parallelization lens 23G is equal to or greater 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 in the normal direction from the incident surface of the green liquid crystal panel 24G when the green light LG is incident on it.

[0207] This implementation method and its effects

[0208] The above is for reference only. Figures 1 to 11As described, 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 with a wavelength different from that of green light LG; a red solid-state light source 211R that emits red light LR with a wavelength different from that of green light LG and blue light LB; a projection lens 27 that emits green light LG, blue light LB and red light LR; a green reflector 22G disposed in the optical path of green light LG between the projection lens 27 and the green solid-state light source 211G; and a green parallelizing lens 23G disposed on the projection lens. The projection lens 27 and the green reflector 22G are arranged in the optical path of the green light LG; a green liquid crystal panel 24G is arranged in the optical path of the green light LG between the projection lens 27 and the green parallelizing lens 23G; and a prism 25 is 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 includes: a green incident side substrate 243G, on which the green light LG is incident; a green exit side substrate 244G, on which the green light LG is emitted; and a green liquid crystal layer 245G, which is sandwiched between the green incident side substrate 243G and the green reflector 22G. Between the green emission-side substrates 244G, the green emission-side substrate 244G includes: an emission glass substrate 248G, which is transparent and has an emission surface for emitting green light LG; a plurality of scan 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 the plurality of scan electrodes 411 respectively; a plurality of pixel electrodes 416 formed on the emission glass substrate 248G and adjacent to any one of the intersection points of the plurality of scan electrodes 411 and the plurality of signal electrodes 413; and a plurality of transistors 414. The green incident side substrate 243G is formed on the exit glass substrate 248G and is connected to any one of the multiple pixel electrodes 416 in a way that allows it to be electrically connected, and is also connected to any one of the multiple signal electrodes 413 in a way that allows it to be electrically connected. The green incident side substrate 243G includes: an incident glass substrate 249G, which is transparent and has an incident surface for green light LG to be incident; a common electrode 417, which is formed on the incident glass substrate 249G and is arranged opposite to the multiple pixel electrodes 416 through the green liquid crystal layer 245G, and applies a voltage to the green liquid crystal layer 245G.And a plurality of first microlenses 247G, formed on the incident glass substrate 249G, wherein the plurality of first microlenses 247G respectively focus the green light LG toward a corresponding pixel electrode 416 among the plurality of pixel electrodes 416. The first angle θ1 is smaller than the second angle θ2. The first angle θ1 is the angle formed by the green light LG passing through the green parallelizing lens 23G relative to the normal at the incident surface of the green liquid crystal panel 24G. The second angle θ2 is the angle formed by the green light LG passing through the green reflector 22G and before the green parallelizing lens 23G relative to the normal at the incident surface of the green liquid crystal panel 24G.

[0209] Therefore, since the structure is such that green light LG is incident on the green liquid crystal panel 24G, and green light LG is emitted from the green liquid crystal panel 24G and emitted from the projection lens 27, there is no need to use a light-absorbing component such as a color filter, which can improve the utilization efficiency of green light LG.

[0210] Furthermore, by using the green parallelization lens 23G, the incident angle of light incident on the green liquid crystal panel 24G can be brought close to zero degrees, thus suppressing the diffusion of green light LG. Therefore, the utilization efficiency of green light LG can be improved.

[0211] Furthermore, in the projector 100, when multiple scanning electrodes 411 apply voltages to the corresponding gates of multiple transistors 414, multiple signal electrodes 413 input signals to the corresponding sources of multiple transistors 414, and multiple pixel electrodes 416 are connected to the drain of any one of the corresponding transistors 414 in a power-conducting manner, when the green liquid crystal panel 24G is viewed from above along the normal direction of the green liquid crystal panel 24G, at least a portion of the semiconductor film 414F constituting the multiple transistors 414 is covered by a corresponding signal electrode 413 among the multiple signal electrodes 413, and the gates of each of the multiple transistors 414 are configured to overlap the area where the corresponding signal electrode 413 among the multiple signal electrodes 413 and the corresponding scanning electrode 411 among the multiple scanning electrodes 411 intersect.

[0212] Therefore, when the green liquid crystal panel 24G is viewed from the normal direction, at least a portion of the semiconductor film 414F is covered by the plurality of signal electrodes 413 respectively, thus suppressing the area of ​​green light LG incident from the normal direction of the green liquid crystal panel 24G by the semiconductor film 414F. Therefore, the utilization efficiency of green light LG can be improved.

[0213] In addition, in the projector 100, a second microlens is disposed on the downstream side of the light path of the green light LG relative to the first microlens 247G on the exit glass substrate 248G, and the second microlens diffuses the green light LG after it is focused by the first microlens 247G.

[0214] Therefore, by using the second microlens to diffuse the green light LG, which is focused by the first microlens 247G, the green light LG can be made nearly parallel. Thus, the utilization efficiency of the green light LG can be improved.

[0215] 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 with a wavelength different from that of green light LG; a red solid-state light source 211R that emits red light LR with a wavelength different from that of green light LG and blue light LB; a projection lens 27 that emits green light LG, blue light LB and red light LR; a green reflector 22G that is disposed in the optical path of green light LG between the projection lens 27 and the green solid-state light source 211G; and a green parallelizing lens 23G that is equipped with... The green light LG is positioned between the projection lens 27 and the green reflector 22G; a green liquid crystal panel 24G is positioned between the projection lens 27 and the green parallelizing lens 23G in the optical path of the green light LG; and a prism 25 is positioned between the projection lens 27 and the green liquid crystal panel 24G in the optical path of the green light LG. The green liquid crystal panel 24G includes: a green incident-side substrate 243G, to which the green light LG is incident; a green exit-side substrate 244G, to which the green light LG is emitted; and a green liquid crystal layer 245G. It is sandwiched between a green incident-side substrate 243G and a green exit-side substrate 244G. The green incident-side substrate 243G includes: an incident glass substrate 249G, which is transparent and has an incident surface for green light LG to be incident; 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 the plurality of scanning electrodes 411 respectively; and a plurality of pixel electrodes 416 formed on the incident glass substrate 249G and intersecting with the plurality of scanning electrodes 411 and the plurality of signal electrodes 416. Any one of the intersection points of the electrodes 413 is adjacent; a plurality of transistors 414 are formed on the incident glass substrate 249G and are electrically connected to any one of the plurality of pixel electrodes 416 and to any one of the plurality of signal electrodes 413; and a plurality of first microlenses 247G are formed on the incident glass substrate 249G. The green emission side substrate 244G includes: an emission glass substrate 248G, which is light-transmitting and has an emission surface for emitting green light LG.A common electrode 417, formed on the emission glass substrate 248G, is disposed opposite to multiple pixel electrodes 416 across the green liquid crystal layer 245G. A voltage is applied to the green liquid crystal layer 245G, and multiple first microlenses 247G focus green light LG toward a corresponding pixel electrode 416 among the multiple pixel electrodes 416. A first angle θ1 is smaller than a second angle θ2. The first angle θ1 is the angle formed by the green light LG passing through the green parallelizing lens 23G relative to the normal at the incident surface of the green liquid crystal panel 24G. The second angle θ2 is the angle formed by the green reflector 22G and the green light LG passing before the green parallelizing lens 23G relative to the normal at the incident surface of the green liquid crystal panel 24G.

[0216] Therefore, since the structure is such that green light LG is incident on the green liquid crystal panel 24G, and green light LG is emitted from the green liquid crystal panel 24G and emitted from the projection lens 27, there is no need to use a light-absorbing component such as a color filter, which can improve the utilization efficiency of green light LG.

[0217] Furthermore, by using the green parallelization lens 23G, the incident angle of light incident on the green liquid crystal panel 24G can be brought close to zero degrees, thus suppressing the diffusion of green light LG. Therefore, the utilization efficiency of green light LG can be improved.

[0218] Furthermore, in the projector 100, when multiple scanning electrodes 411 apply voltages to the corresponding gates of multiple transistors 414, multiple signal electrodes 413 input signals to the corresponding sources of multiple transistors 414, and multiple pixel electrodes 416 are connected to the drains of any one of the corresponding transistors 414 in a power-conducting manner, when the green liquid crystal panel 24G is viewed from above along the normal direction of the green liquid crystal panel 24G, at least a portion of the semiconductor film 414F constituting the multiple transistors 414 is covered by a corresponding signal electrode 413 among the multiple signal electrodes 413, and the gates of each of the multiple transistors 414 are configured to overlap the area where the corresponding signal electrode 413 among the multiple signal electrodes 413 and the corresponding scanning electrode 411 among the multiple scanning electrodes 411 intersect.

[0219] Therefore, when the green liquid crystal panel 24G is viewed from the normal direction, at least a portion of the semiconductor film 414F is covered by a plurality of signal electrodes 413, thereby suppressing the area of ​​green light LG incident from the normal direction of the green liquid crystal panel 24G by the semiconductor film 414F. Thus, the utilization efficiency of the green light LG can be improved.

[0220] In addition, in the projector 100, a second microlens is disposed on the downstream side of the light path of the green light LG relative to the first microlens 247G on the exit glass substrate 248G, and the second microlens diffuses the green light LG after it is focused by the first microlens 247G.

[0221] Therefore, by using the second microlens to diffuse the green light LG, which is focused by the first microlens 247G, the green light LG can be made nearly parallel. Thus, the utilization efficiency of the green light LG can be improved.

[0222] Furthermore, in the projector 100, the area S3 of the green light LG emitted from the green parallelization lens 23G is equal to or greater than the area S4 of the sealed region R4 of the green liquid crystal layer 245G when the green liquid crystal panel 24G is viewed in the normal direction from the incident surface of the green light LG onto the green liquid crystal panel 24G.

[0223] Therefore, the green light LG emitted from the green parallelization lens 23G can reliably cover the sealing region R4 of the green liquid crystal panel 24G containing the green liquid crystal layer 245G. Thus, the utilization efficiency of the green light LG can be improved.

[0224] Furthermore, in the projector 100, the area S3 of the green light LG emitted from the green parallelizing lens 23G is equal to or greater than the area S4, but smaller than the area of ​​the maximum region where the green liquid crystal layer 245G is disposed. This area S4 is the sealed area 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 where the green light LG is incident on the green liquid crystal panel 24G, and is the area where the plurality of pixel electrodes 416 and the plurality of first microlenses 247G overlap. In addition, the "maximum region" corresponds to the green incident side substrate 243G and the green exit side substrate 244G.

[0225] Here, the maximum area where the green liquid crystal layer 245G is configured refers to the area bounded by the sealing member 45. In contrast, the area where the pixel electrode 416 overlaps with the first microlens 247G refers to the area through which incident light passes. At the end of the area where the green liquid crystal layer 245G is configured, the pixel electrode 416 is not formed, but the driving circuit 4 is formed instead. Therefore, since incident light does not pass through at the end of the green liquid crystal layer 245G, the utilization efficiency of the green light LG decreases when it is incident on that portion.

[0226] Therefore, the area of ​​the green light LG emitted from the green parallelizing lens 23G is preferably such that it does not cover the end of the green liquid crystal layer 245G. According to the above structure, the green light LG emitted from the green parallelizing lens 23G can reliably cover the area of ​​the green liquid crystal panel 24G where the green liquid crystal layer 245G is located. Therefore, the utilization efficiency of the green light LG can be improved.

[0227] In addition, in the projector 100, the shape of the emitting end 222G of the green reflector 22G connected to the green parallelization lens 23G is rectangular. When the green liquid crystal panel 24G is viewed from the normal direction of the incident surface where the green light LG of the green liquid crystal panel 24G is incident, the shape of the sealing area R4 where the green liquid crystal layer 245G is disposed is rectangular.

[0228] Therefore, the shape of the emitting end 222G of the green reflector 22G is rectangular, and the shape of the sealing region R4 is also rectangular, thus enabling the green light LG emitted from the green reflector 22G to overlap with the sealing region R4. This improves the utilization efficiency of the green light LG.

[0229] In addition, in the projector 100, the emitting end 222G of the green reflector 22G is rectangular, the sealing area R4 of the incident surface of the green liquid crystal panel 24G is rectangular, and the aspect ratio of the emitting 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.

[0230] Therefore, the aspect ratio of the emitting 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, thus enabling the green light LG emitted from the green reflector 22G to overlap with the sealing region R4. This improves the utilization efficiency of the green light LG.

[0231] Furthermore, in the projector 100, the area of ​​green light LG incident on the green parallel lens 23G is equal to the area of ​​green light LG exiting from the green parallel lens 23G.

[0232] Therefore, the green light LG emitted from the green parallelizing lens 23G can be configured as a parallel light, so that it exits with an area equal to the area of ​​the green light LG incident on the green parallelizing lens 23G. Thus, the utilization efficiency of the green light LG can be improved.

[0233] Additionally, the projector 100 includes: a blue reflector 22B disposed in the optical path of blue light LB between the projection lens 27 and the blue solid-state light source 211B; a blue parallelizing lens 23B disposed in the optical path of blue light LB between the projection lens 27 and the blue reflector 22B; a blue liquid crystal panel 24B disposed in the optical path of blue light LB between the projection lens 27 and the blue parallelizing lens 23B; a red reflector 22R disposed in the optical path of red light LR between the projection lens 27 and the red solid-state light source 211R; a red parallelizing lens 23R disposed in the optical path of red light LR between the projection lens 27 and the red reflector 22R; and a red liquid crystal panel 24R disposed in the optical path of red light LR between the projection lens 27 and the red parallelizing lens 23R. The blue liquid crystal panel 24B includes a blue liquid crystal layer and a red liquid crystal layer. Panel 24R includes a red liquid crystal layer. The end of the green reflector 22G that is connected to the green parallel lens 23G is rectangular in shape. The emitting end of the blue reflector 22B that is connected to the blue parallel lens 23B is rectangular in shape. The emitting end of the red reflector 22R that is connected to the red parallel lens 23R is rectangular in shape. When the green liquid crystal panel 24G is observed along the normal direction from the incident surface where green light LG is incident relative to the green liquid crystal panel 24G, the sealing area where the green liquid crystal layer 245G is disposed is rectangular in shape. When the blue liquid crystal panel 24B is observed along the normal direction from the incident surface where blue light LB is incident relative to the blue liquid crystal panel 24B, the sealing area where the blue liquid crystal layer is disposed is rectangular in shape. When the red liquid crystal panel 24R is observed along the normal direction from the incident surface where red light LR is incident relative to the red liquid crystal panel 24R, the area where the red liquid crystal layer is disposed is rectangular in shape.

[0234] Therefore, the structures of the blue reflector 22B, the blue parallel lens 23B, and the blue liquid crystal panel 24B are identical to those of the green reflector 22G, the green parallel lens 23G, and the green liquid crystal panel 24G. Furthermore, the structures of the red reflector 22R, the red parallel lens 23R, and the red liquid crystal panel 24R are identical to those of the green reflector 22G, the green parallel 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 improved in the same way as the green light LG.

[0235] Furthermore, in the projector 100, the shapes of the emitting end 222G of the green reflector 22G, the emitting end of the blue reflector 22B, and the emitting end of the red reflector 22R are all rectangular. The shapes of the sealing area R4 of the incident surface of the green liquid crystal panel 24G, the sealing area of ​​the incident surface of the blue liquid crystal panel 24B, and the sealing area of ​​the incident surface of the red liquid crystal panel 24R are all rectangular. The aspect ratio of the emitting 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 emitting 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. The aspect ratio of the emitting end of the red reflector 22R is equal to the aspect ratio of the sealing area of ​​the incident surface of the red liquid crystal panel 24R.

[0236] Therefore, the aspect ratio of the emitting end 222G of the green reflector 22G is equal to the aspect ratio of the sealed region R4 of the incident surface of the green liquid crystal panel 24G, thus enabling the green light LG emitted from the green reflector 22G to overlap with the sealed region R4. This improves the utilization efficiency of the green light LG. Similarly, the aspect ratio of the emitting end of the blue reflector 22B is equal to the aspect ratio of the sealed region of the incident surface of the blue liquid crystal panel 24B, thus enabling the blue light LB emitted from the blue reflector 22B to overlap with the sealed region of the blue liquid crystal panel 24B. This improves the utilization efficiency of the blue light LB. Likewise, the aspect ratio of the emitting end of the red reflector 22R is equal to the aspect ratio of the sealed region of the incident surface of the red liquid crystal panel 24R, thus enabling the red light LR emitted from the red reflector 22R to overlap with the sealed region of the red liquid crystal panel 24R. This improves the utilization efficiency of the red light LR.

[0237] Furthermore, in the projector 100, the area S3 of the emitting end 222G of the green reflector 22G is equal to or greater than the area S4 of the sealed area R4 of the incident surface of the green liquid crystal panel 24G, the area of ​​the emitting end of the blue reflector 22B is equal to or greater than the area of ​​the sealed area of ​​the incident surface of the blue liquid crystal panel 24B, and the area of ​​the emitting end of the red reflector 22R is equal to or greater than the area of ​​the sealed area of ​​the incident surface of the red liquid crystal panel 24R.

[0238] Therefore, the green light LG emitted from the emitting end 222G of the green reflector 22G can reliably cover the sealing area R4 of the green liquid crystal panel 24G. This improves the utilization efficiency of the green light LG. Similarly, the blue light LB emitted from the emitting end of the blue reflector 22B can reliably cover the sealing area of ​​the blue liquid crystal panel 24B. This also improves the utilization efficiency of the blue light LB. Furthermore, the red light LR emitted from the emitting end of the red reflector 22R can reliably cover the sealing area of ​​the red liquid crystal panel 24R. This further improves the utilization efficiency of the red light LR.

[0239] Additionally, the projector 100 includes: a blue reflector 22B disposed in the optical path of blue light LB between the projection lens 27 and the blue solid-state light source 211B; a blue parallelizing lens 23B disposed in the optical path of blue light LB between the projection lens 27 and the blue reflector 22B; a blue liquid crystal panel 24B disposed in the optical path of blue light LB between the projection lens 27 and the blue parallelizing lens 23B; a red reflector 22R disposed in the optical path of red light LR between the projection lens 27 and the red solid-state light source 211R; and a red parallelizing lens 23R disposed between the projection lens 27 and the red reflector 22B. The red light LR is located between the projection lens 27 and the red parallel lens 23R. The green solid-state light source 211G, the blue solid-state light source 211B, and the red solid-state light source 211R each contain 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. The red reflector 22R shapes the red light LR emitted by the red solid-state light source 211R into a rectangle.

[0240] Therefore, the green light LG emitted from the multiple LEDs is shaped into a rectangle by the green reflector 22G, thereby improving the utilization efficiency of the green light LG incident on the green LCD panel 24G. Similarly, the blue light LB emitted from the multiple LEDs is shaped into a rectangle by the blue reflector 22B, thus improving the utilization efficiency of the blue light LB incident on the blue LCD panel 24B. Likewise, the red light LR emitted from the multiple LEDs is shaped into a rectangle by the red reflector 22R, thereby improving the utilization efficiency of the red light LR incident on the red LCD panel 24R.

[0241] Additionally, the projector 100 includes: a blue reflector 22B, disposed in the optical path of blue light LB between the projection lens 27 and the blue solid-state light source 211B; a blue parallelizing lens 23B, disposed in the optical path of blue light LB between the projection lens 27 and the blue reflector 22B; a blue liquid crystal panel 24B, disposed in the optical path of blue light LB between the projection lens 27 and the blue parallelizing lens 23B; a red reflector 22R, disposed in the optical path of red light LR between the projection lens 27 and the red solid-state light source 211R; and a red parallelizing lens 23R, disposed in the optical path of the projection lens 27 and the red reflector 22B. The red light LR is located between the reflector 22R and the red liquid crystal panel 24R, which is located between the projection lens 27 and the red parallel lens 23R. 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 multiple laser diodes 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.

[0242] Therefore, the green light LG emitted from the multiple laser diodes is shaped into a rectangle by the green reflector 22G, thereby improving the utilization efficiency of the green light LG incident on the green liquid crystal panel 24G. Similarly, the blue light LB emitted from the multiple laser diodes is shaped into a rectangle by the blue reflector 22B, thus improving the utilization efficiency of the blue light LB incident on the blue liquid crystal panel 24B. Likewise, the red light LR emitted from the multiple laser diodes is shaped into a rectangle by the red reflector 22R, thus improving the utilization efficiency of the red light LR incident on the red liquid crystal panel 24R.

[0243] Additionally, the projector 100 includes: a blue reflector 22B disposed in the optical path of blue light LB between the projection lens 27 and the blue solid-state light source 211B; a blue parallelizing lens 23B disposed in the optical path of blue light LB between the projection lens 27 and the blue reflector 22B; a blue liquid crystal panel 24B disposed in the optical path of blue light LB between the projection lens 27 and the blue parallelizing lens 23B; a red reflector 22R disposed in the optical path of red light LR between the projection lens 27 and the red solid-state light source 211R; a red parallelizing lens 23R disposed in the optical path of red light LR between the projection lens 27 and the red reflector 22R; a red liquid crystal panel 24R disposed in the optical path of red light LR between the projection lens 27 and the red parallelizing lens 23R; and a green incident polarizing plate 241. G, which is disposed in the optical path of green light LG between projection lens 27 and green parallel lens 23G; blue incident polarizer 241B, which is disposed in the optical path of blue light LB between projection lens 27 and blue parallel lens 23B; and red incident polarizer 241R, which is disposed in the optical path of red light LR between projection lens 27 and red parallel lens 23R. Green incident polarizer 241G is disposed between green parallel lens 23G and green liquid crystal panel 24G, blue incident polarizer 241B is disposed between blue parallel lens 23B and blue liquid crystal panel 24B, and red incident polarizer 241R is disposed between red parallel lens 23R and red liquid crystal panel 24R. Green incident polarizer 241G, blue incident polarizer 241B, and red incident polarizer 241R are reflective polarizers.

[0244] Therefore, the green incident polarizer 241G is a reflective polarizer. Thus, the green light LG reflected by the green incident polarizer 241G passes through the green parallelizing lens 23G, returns to the green reflector 22G, is reflected again, and returns to the green incident polarizer 241G. This improves the utilization efficiency of the green light LG. Similarly, the blue incident polarizer 241B is a reflective polarizer. Therefore, the blue light LB reflected by the blue incident polarizer 241B passes through the blue parallelizing lens 23B, returns to the blue reflector 22B, is reflected again, and returns to the blue incident polarizer 241B. This improves the utilization efficiency of the blue light LB. Likewise, the red incident polarizer 241R is a reflective polarizer. Therefore, the red light LR reflected by the red incident polarizer 241R passes through the red parallelizing lens 23R, returns to the red reflector 22R, is reflected again, and returns to the red incident polarizer 241R. This improves the utilization efficiency of the red light LR.

[0245] Additionally, the projector 100 includes: a blue reflector 22B disposed in the optical path of blue light LB between the projection lens 27 and the blue solid-state light source 211B; a blue parallelizing lens 23B disposed in the optical path of blue light LB between the projection lens 27 and the blue reflector 22B; a blue liquid crystal panel 24B disposed in the optical path of blue light LB between the projection lens 27 and the blue parallelizing lens 23B; a red reflector 22R disposed in the optical path of red light LR between the projection lens 27 and the red solid-state light source 211R; a red parallelizing lens 23R disposed in the optical path of red light LR between the projection lens 27 and the red reflector 22R; a red liquid crystal panel 24R disposed in the optical path of red light LR between the projection lens 27 and the red parallelizing lens 23R; and a green incident polarizing plate 241. G, which is disposed in the optical path of green light LG between projection lens 27 and green parallel lens 23G; blue incident polarizer 241B, which is disposed in the optical path of blue light LB between projection lens 27 and blue parallel lens 23B; and red incident polarizer 241R, which is disposed in the optical path of red light LR between projection lens 27 and red parallel lens 23R. Green incident polarizer 241G is disposed between green parallel lens 23G and green liquid crystal panel 24G, blue incident polarizer 241B is disposed between blue parallel lens 23B and blue liquid crystal panel 24B, and red incident polarizer 241R is disposed between red parallel lens 23R and red liquid crystal panel 24R. Green incident polarizer 241G, blue incident polarizer 241B, and red incident polarizer 241R are all inorganic polarizers.

[0246] Therefore, the green incident polarizer 241G, the blue incident polarizer 241B, and the red incident polarizer 241R are all inorganic polarizers, thus suppressing the degradation caused by heating compared to organic polarizers. Therefore, the light intensity of each of the green solid-state light source 211G, the blue solid-state light source 211B, and the red solid-state light source 211R can be increased.

[0247] Other implementation methods

[0248] The above-described embodiment is a preferred embodiment. However, it is not limited to the above-described embodiment, and various modifications can be implemented without departing from the spirit of the subject.

[0249] In this embodiment, the case where "first light" is green light LG, "second light" is blue light LB, and "third light" is red light LR is described, but the embodiment is not limited to this. "First light" can be any one of green light LG, blue light LB, and red light LR.

[0250] In this embodiment, as referred to Figure 9As explained, the case where the semiconductor film 414F of transistor 414 is formed on signal electrode 413 has been described, but at least a portion of the semiconductor film 414F of transistor 414 may be formed on signal electrode 413.

[0251] in addition, Figure 1 The parts shown represent functional structures, and there are no particular restrictions on the specific installation method. That is, it is not necessary to install hardware corresponding to each functional part; the structure can also be configured so that the functions of multiple functional parts are implemented by a single processor executing a program. In addition, in the above embodiment, a part of the function implemented by software can be implemented by hardware, or a part of the function implemented by hardware can be implemented by software. Furthermore, the specific details of the structure of each part of the projector 100 can be arbitrarily changed without departing from the main idea.

[0252] Postscript

[0253] The following is a summary published in this note.

[0254] Postscript 1

[0255] A projector comprising: a first solid-state light source emitting a first light; a second solid-state light source emitting a second light with a wavelength different from the first light; a third solid-state light source emitting a third light with a wavelength different from both the first and second light; a projection lens emitting the first, second, and third light; a first reflector disposed between the projection lens and the first solid-state light source in the optical path of the first light; a first parallelizing lens disposed between the projection lens and the first reflector in the optical path of the first light; and a first liquid crystal panel disposed between the projection lens and the first parallelizing lens. The first liquid crystal panel includes: an incident-side substrate to which the first light is incident; an exit-side substrate to 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 includes: an exit substrate having light transmittance and an exit surface for emitting the first light; a plurality of scanning electrodes formed on the exit substrate; and a plurality of signal electrodes formed on the exit substrate and connected to the plurality of scanning electrodes. The incident side substrate comprises: a plurality of pixel electrodes formed on the emission substrate and adjacent to any one of the intersection points of the plurality of scan electrodes and the plurality of signal electrodes; and a plurality of transistors formed on the emission substrate and connected to any one of the plurality of pixel electrodes and to any one of the plurality of signal electrodes in a powerable manner. The incident side substrate includes: an incident substrate having light transmittance and having an incident surface for the first light incidence; and a common electrode formed on the incident substrate and separated from the plurality of pixel electrodes by the first liquid crystal layer. The first liquid crystal layer is configured with opposing pixel electrodes to apply a voltage; and a plurality of first microlenses are formed on the incident substrate, each of the plurality of first microlenses focusing the first light toward a corresponding pixel electrode among the plurality of pixel electrodes. The first angle is smaller than the second angle. The first angle is the angle formed by the first light passing through the first parallel lens relative to the normal at the incident surface of the first liquid crystal panel, and the second angle is the angle formed by the first light passing through the first reflector and before the first parallel lens relative to the normal at the incident surface of the first liquid crystal panel.

[0256] Therefore, since the structure is such that the first light is incident on the first liquid crystal panel, the first light is emitted from the first liquid crystal panel and then from the projection lens, there is no need to use a light-absorbing component such as a color filter, which can improve the utilization efficiency of the first light.

[0257] Furthermore, by using the first parallelizing lens, the incident angle of the light incident on the incident surface of the first liquid crystal panel can be brought close to zero degrees, thereby suppressing the diffusion of the first light. Therefore, the utilization efficiency of the first light can be improved.

[0258] Appendix 2

[0259] According to the projector described in Appendix 1, when the plurality of scanning electrodes apply voltages to the corresponding gates of the plurality of transistors, the plurality of signal electrodes input signals to the corresponding sources of the plurality of transistors, and the plurality of pixel electrodes are respectively connected to the drain of any one of the plurality of transistors in a power-conducting manner, when the first liquid crystal panel is viewed from above along the normal direction of the first liquid crystal panel, at least a portion of the semiconductor film constituting the plurality of transistors is covered by a corresponding signal electrode among the plurality of signal electrodes, and the gates of the plurality of transistors are configured to overlap the region where the corresponding signal electrode among the plurality of signal electrodes and the corresponding scanning electrode among the plurality of scanning electrodes intersect.

[0260] Therefore, when the first liquid crystal panel is viewed from the normal direction, at least a portion of the semiconductor film is covered by the multiple signal electrodes, thus suppressing the area of ​​the semiconductor film that blocks the first light incident from the normal direction of the first liquid crystal panel. Therefore, the utilization efficiency of the first light can be improved.

[0261] Appendix 3

[0262] According to the projector described in Appendix 1 or 2, a second microlens is disposed on the downstream side of the optical path of the first light relative to the first microlens on the emission substrate, the second microlens causing the first light, which has been focused by the first microlens, to diffuse.

[0263] Therefore, by using the second microlens to diffuse the first light, which has been focused by the first microlens, the first light can be made nearly parallel. Thus, the utilization efficiency of the first light can be improved.

[0264] Appendix 4

[0265] A projector comprising: a first solid-state light source emitting a first light; a second solid-state light source emitting a second light with a wavelength different from the first light; a third solid-state light source emitting a third light with a wavelength different from both the first and second light; a projection lens emitting the first, second, and third light; a first reflector disposed between the projection lens and the first solid-state light source in the optical path of the first light; a first parallelizing lens disposed between the projection lens and the first reflector in the optical path of the first light; and a first liquid crystal panel disposed between the projection lens and the first parallelizing lens. The first liquid crystal panel includes: an incident-side substrate to which the first light is incident; an exit-side substrate to 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 transmittance and having an incident surface on which the first light is incident; a plurality of scanning electrodes formed on the incident substrate; and a plurality of signal electrodes formed on the incident substrate and separated from the plurality of scanning electrodes. The substrate comprises: a plurality of pixel electrodes formed on the incident substrate and adjacent to any one of the intersection points of the plurality of scan electrodes and the plurality of signal electrodes; a plurality of transistors formed on the incident substrate and connected to any one of the plurality of pixel electrodes and to any one of the plurality of signal electrodes in a powerable manner; and a plurality of first microlenses formed on the incident substrate. The exit-side substrate includes: an exit substrate having light transmittance and having an exit surface for emitting the first light; and a common electrode formed on the exit substrate. The first liquid crystal layer is positioned above the first liquid crystal layer and opposite to the plurality of pixel electrodes. A voltage can be applied to the first liquid crystal layer. The plurality of first microlenses focus the first light toward a corresponding pixel electrode among the plurality of pixel electrodes. The first angle is smaller than the second angle. The first angle is the angle formed by the first light passing through the first parallel lens relative to the normal at the incident surface of the first liquid crystal panel. The second angle is the angle formed by the first light passing through the first reflector and before the first parallel lens relative to the normal at the incident surface of the first liquid crystal panel.

[0266] Therefore, since the structure is such that the first light is incident on the first liquid crystal panel, the first light is emitted from the first liquid crystal panel and then from the projection lens, there is no need to use a light-absorbing component such as a color filter, which can improve the utilization efficiency of the first light.

[0267] Furthermore, by using the first parallelizing lens, the incident angle of the light incident on the incident surface of the first liquid crystal panel can be brought close to zero degrees, thereby suppressing the diffusion of the first light. Therefore, the utilization efficiency of the first light can be improved.

[0268] Appendix 5

[0269] According to the projector described in Appendix 4, when the plurality of scanning electrodes apply voltages to the corresponding gates of the plurality of transistors, the plurality of signal electrodes input signals to the corresponding sources of the plurality of transistors, and the plurality of pixel electrodes are respectively connected to the drain of any one of the plurality of transistors in a power-conducting manner, when the first liquid crystal panel is viewed from above along the normal direction of the first liquid crystal panel, at least a portion of the semiconductor film constituting the plurality of transistors is covered by a corresponding signal electrode among the plurality of signal electrodes, and the gates of the plurality of transistors are configured to overlap the region where the corresponding signal electrode among the plurality of signal electrodes and the corresponding scanning electrode among the plurality of scanning electrodes intersect.

[0270] Therefore, when the first liquid crystal panel is viewed from the normal direction, at least a portion of the semiconductor film is covered by the multiple signal electrodes, thus suppressing the area of ​​the semiconductor film that blocks the first light incident from the normal direction of the first liquid crystal panel. Therefore, the utilization efficiency of the first light can be improved.

[0271] Appendix 6

[0272] According to the projector described in Appendix 4 or 5, a second microlens is disposed on the downstream side of the optical path of the first light relative to the first microlens on the emission substrate, the second microlens causing the first light, which has been focused by the first microlens, to diffuse.

[0273] Therefore, by using the second microlens to diffuse the first light, which has been focused by the first microlens, the first light can be made nearly parallel. Thus, the utilization efficiency of the first light can be improved.

[0274] Postscript 7

[0275] According to any one of Appendices 1 to 6, in the projector, the area of ​​the first light emitted from the first parallelizing lens is equal to or greater than the area of ​​the region where 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 where the first light is incident on the first liquid crystal panel.

[0276] Therefore, the first light emitted from the first parallelizing lens can reliably cover the sealed area of ​​the first liquid crystal panel where the first liquid crystal layer exists. Thus, the utilization efficiency of the first light can be improved.

[0277] Postscript 8

[0278] According to any one of Appendices 1 to 7, in the projector, the area of ​​the first light emitted from the first parallel lens is equal to or greater than the area of ​​the region where the first liquid crystal layer is disposed when viewing the first liquid crystal panel from the normal direction of the incident surface where the first light is incident on the first liquid crystal panel, and the area of ​​the plurality of pixel electrodes overlapping the plurality of first microlenses, and the area of ​​the first light emitted from the first parallel lens is less than the area of ​​the largest region where the first liquid crystal layer is disposed.

[0279] Here, the maximum area where the first liquid crystal layer is disposed refers to the area bounded by the sealing member where the first liquid crystal layer is disposed. In contrast, the area where the pixel electrode overlaps with the first microlens refers to the area through which incident light passes. Pixel electrodes are not formed at the ends of the area where the first liquid crystal layer is disposed, but driving circuitry is formed instead. Therefore, since incident light does not pass through the ends of the first liquid crystal layer, the utilization efficiency of the first light decreases when the first light is incident on that portion.

[0280] Therefore, the area of ​​the first light emitted from the first parallelizing lens is preferably such that it does not cover the end of the first liquid crystal layer. According to the above structure, the first light emitted from the first parallelizing lens can reliably cover the area of ​​the first liquid crystal panel where the first liquid crystal layer exists. Therefore, the utilization efficiency of the first light can be improved.

[0281] Postscript 9

[0282] According to any one of Appendices 1 to 8, the projector wherein the end of the first reflector that is connected to the first parallelizing lens is rectangular in shape, and the area in which the first liquid crystal layer is disposed is rectangular when the first liquid crystal panel is viewed from the normal direction of the incident surface on which the first light is incident.

[0283] Therefore, the shape of the emitting end of the first reflector is rectangular, and the shape of the sealing area is also rectangular, thus enabling the first light emitted from the first reflector to overlap with the sealing area. This improves the utilization efficiency of the first light.

[0284] Postscript 10

[0285] According to the projector described in Appendix 9, the end of the first reflector is rectangular in shape, the area of ​​the incident surface of the first liquid crystal panel is rectangular in shape, 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.

[0286] Therefore, the aspect ratio of the emitting end of the first reflector is equal to the aspect ratio of the sealed area of ​​the incident surface of the first liquid crystal panel, thus enabling the first light emitted from the first reflector to overlap with the sealed area. This improves the utilization efficiency of the first light.

[0287] Postscript 11

[0288] According to the projector described in Appendix 10, the area of ​​the first light incident on the first parallelizing lens is equal to the area of ​​the first light exiting from the first parallelizing lens.

[0289] Therefore, the first light emitted from the first parallelizing lens can be configured as a parallel light, emitting from an area equal to the area of ​​the first light incident on the first parallelizing lens. Thus, the utilization efficiency of the first light can be improved.

[0290] Postscript 12

[0291] A projector according to any one of Appendices 1 to 8, comprising: a second reflector disposed on the optical path of the second light between the projection lens and the second solid-state light source; a second parallelizing lens disposed on the optical path of the second light between the projection lens and the second reflector; a second liquid crystal panel disposed on the optical path of the second light between the projection lens and the second parallelizing lens; a third reflector disposed on the optical path of the third light between the projection lens and the third solid-state light source; a third parallelizing lens disposed on the optical path of the third light between the projection lens and the third reflector; and a third liquid crystal panel disposed on the optical path of the third light between the projection lens and the third parallelizing lens, wherein the second liquid crystal panel comprises a second liquid crystal layer, and the third liquid crystal layer comprises a second liquid crystal layer. The crystal panel includes a third liquid crystal layer. The end of the first reflector that is in contact with the first parallel lens is rectangular in shape. The end of the second reflector that is in contact with the second parallel lens is rectangular in shape. The end of the third reflector that is in contact with the third parallel lens is rectangular in shape. When the first liquid crystal panel is viewed along the normal direction relative to the incident surface of the first light incident on the first liquid crystal panel, the area where the first liquid crystal layer is disposed is rectangular in shape. When the second liquid crystal panel is viewed along the normal direction relative to the incident surface of the second light incident on the second liquid crystal panel, the area where the second liquid crystal layer is disposed is rectangular in shape. When the third liquid crystal panel is viewed along the normal direction relative to the incident surface of the third light incident on the third liquid crystal panel, the area where the third liquid crystal layer is disposed is rectangular in shape.

[0292] Therefore, the structures of the second reflector, the second parallelizing lens, and the second liquid crystal panel are identical to those of the first reflector, the first parallelizing lens, and the first liquid crystal panel. Furthermore, the structures of the third reflector, the third parallelizing lens, and the third liquid crystal panel are identical to those of the first reflector, the first parallelizing lens, and the first liquid crystal panel. Thus, the utilization efficiency of the second and third lights can be improved in the same way as that of the first light.

[0293] Postscript 13

[0294] According to the projector described in Appendix 12, the shapes of the ends of the first reflector, the second reflector, and the third reflector are all rectangular; the shapes of the regions of the incident surfaces of the first liquid crystal panel, the second liquid crystal panel, and the third liquid crystal panel are all rectangular; the aspect ratio of the end of the first reflector is equal to the aspect ratio of the region 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 region 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 region of the incident surface of the third liquid crystal panel.

[0295] Therefore, the aspect ratio of the emitting end of the first reflector is equal to the aspect ratio of the sealed area of ​​the incident surface of the first liquid crystal panel, thus enabling the first light emitted from the first reflector to overlap with the sealed area. This improves the utilization efficiency of the first light. Furthermore, similarly, the utilization efficiency of the second and third lights can also be improved.

[0296] Postscript 14

[0297] According to the projector described in Appendix 13, the area of ​​the end of the first reflector is equal to or greater 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 greater 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 greater than the area of ​​the region of the incident surface of the third liquid crystal panel.

[0298] Therefore, the first light emitted from the emitting end of the first reflector can reliably cover the sealed area of ​​the first liquid crystal panel. This improves the utilization efficiency of the first light. Similarly, the second light emitted from the emitting end of the second reflector can reliably cover the sealed area of ​​the second liquid crystal panel. This improves the utilization efficiency of the second light. Furthermore, the third light emitted from the emitting end of the third reflector can reliably cover the sealed area of ​​the third liquid crystal panel. This improves the utilization efficiency of the third light.

[0299] Postscript 15

[0300] The projector according to any one of Appendices 1 to 8 comprises: a second reflector disposed on the optical path of the second light between the projection lens and the second solid-state light source; a second parallelizing lens disposed on the optical path of the second light between the projection lens and the second reflector; a second liquid crystal panel disposed on the optical path of the second light between the projection lens and the second parallelizing lens; a third reflector disposed on the optical path of the third light between the projection lens and the third solid-state light source; and a third parallelizing lens disposed on the optical path of the projection lens and the second solid-state light source. The third reflector is located in the optical path of the third light; and a third liquid crystal panel is disposed in the optical path of the third light between the projection lens and the third parallelizing lens. 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 LEDs arranged on the base. The first reflector shapes the first light emitted by the first solid-state light source into a rectangle, the second reflector shapes the second light emitted by the second solid-state light source into a rectangle, and the third reflector shapes the third light emitted by the third solid-state light source into a rectangle.

[0301] Therefore, 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. Furthermore, 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. Additionally, 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.

[0302] Postscript 16

[0303] The projector according to any one of Appendices 1 to 8 comprises: a second reflector disposed on the optical path of the second light between the projection lens and the second solid-state light source; a second parallelizing lens disposed on the optical path of the second light between the projection lens and the second reflector; a second liquid crystal panel disposed on the optical path of the second light between the projection lens and the second parallelizing lens; a third reflector disposed on the optical path of the third light between the projection lens and the third solid-state light source; and a third parallelizing lens disposed on the optical path of the projection lens and the second solid-state light source. The third reflector is located in the optical path of the third light; and a third liquid crystal panel is disposed in the optical path of the third light between the projection lens and the third parallelizing lens. 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 by the first solid-state light source into a rectangle, the second reflector shapes the second light emitted by the second solid-state light source into a rectangle, and the third reflector shapes the third light emitted by the third solid-state light source into a rectangle.

[0304] Therefore, 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. Furthermore, 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. Additionally, 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.

[0305] Postscript 17

[0306] The projector according to any one of Appendices 1 to 8 comprises: a second reflector disposed on the optical path of the second light between the projection lens and the second solid-state light source; a second parallelizing lens disposed on the optical path of the second light between the projection lens and the second reflector; a second liquid crystal panel disposed on the optical path of the second light between the projection lens and the second parallelizing lens; a third reflector disposed on the optical path of the third light between the projection lens and the third solid-state light source; a third parallelizing lens disposed on the optical path of the third light between the projection lens and the third reflector; and a third liquid crystal panel disposed on the optical path of the second light between the projection lens and the third parallelizing lens. The optical path of the third light includes: a first polarizing plate disposed between the projection lens and the first parallelizing lens in the optical path of the first light; a second polarizing plate disposed between the projection lens and the second parallelizing lens in the optical path of the second light; and a third polarizing plate disposed between the projection lens and the third parallelizing lens in the optical path of the third light. 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, and the third polarizing plate is disposed between the third parallelizing lens and the third liquid crystal panel. The first, second, and third polarizing plates are reflective polarizing plates.

[0307] Therefore, the first incident polarizing plate is a reflective polarizing plate. Thus, the first light reflected by the first incident polarizing plate passes through the first parallelizing lens, returns to the first reflector, is reflected again, and returns to the first incident polarizing plate. This improves the utilization efficiency of the first light. Similarly, the second incident polarizing plate is a reflective polarizing plate. Therefore, the second light reflected by the second incident polarizing plate passes through the second parallelizing lens, returns to the second reflector, is reflected again, and returns to the second incident polarizing plate. This improves the utilization efficiency of the second light. Likewise, the third incident polarizing plate is a reflective polarizing plate. Therefore, the third light reflected by the third incident polarizing plate passes through the third parallelizing lens, returns to the third reflector, is reflected again, and returns to the third incident polarizing plate. This improves the utilization efficiency of the third light.

[0308] Postscript 18

[0309] The projector according to any one of Appendices 1 to 8 comprises: a second reflector disposed on the optical path of the second light between the projection lens and the second solid-state light source; a second parallelizing lens disposed on the optical path of the second light between the projection lens and the second reflector; a second liquid crystal panel disposed on the optical path of the second light between the projection lens and the second parallelizing lens; a third reflector disposed on the optical path of the third light between the projection lens and the third solid-state light source; a third parallelizing lens disposed on the optical path of the third light between the projection lens and the third reflector; and a third liquid crystal panel disposed on the optical path of the second light between the projection lens and the third parallelizing lens. The optical path of the third light includes: a first polarizing plate disposed between the projection lens and the first parallelizing lens in the optical path of the first light; a second polarizing plate disposed between the projection lens and the second parallelizing lens in the optical path of the second light; and a third polarizing plate disposed between the projection lens and the third parallelizing lens in the optical path of the third light. 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, and the third polarizing plate is disposed between the third parallelizing lens and the third liquid crystal panel. The first, second, and third polarizing plates are all inorganic polarizing plates.

[0310] Therefore, since the first, second, and third incident polarizing plates are all inorganic polarizing plates, the degradation caused by heating can be suppressed compared to the case of organic polarizing plates. Thus, the light intensity of the first, second, and third solid-state light sources can be increased.

Claims

1. A projector, characterized in that, have: The first solid-state light source, which emits the first light; A second solid-state light source emits a second light with a wavelength different from the first light; A third solid-state light source emits a third light with a wavelength different from 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 is disposed in the optical path of the first light between the projection lens and the first solid-state light source; A first parallelizing lens is disposed in the optical path of the first light between the projection lens and the first reflector; A first liquid crystal panel is disposed in the optical path of the first light between the projection lens and the first parallelizing lens; as well as A prism, disposed in the 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 onto 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 light transmittance and an emission surface for emitting the first light; a plurality of scanning electrodes formed on the emission substrate; and a plurality of signal electrodes formed on the emission substrate and intersecting with the plurality of scanning electrodes respectively. Multiple pixel electrodes are formed on the emission substrate and are adjacent to any one of the intersection points where the multiple scan electrodes and the multiple signal electrodes intersect; And a plurality of transistors formed on the emission substrate, which are electrically connected to any one of the plurality of pixel electrodes and electrically connected to any one of the plurality of signal electrodes. The incident-side substrate includes: an incident substrate that is transparent and has an incident surface for the first light to be incident; a common electrode formed on the incident substrate and disposed opposite to the plurality of pixel electrodes across the first liquid crystal layer, for applying a voltage to the first liquid crystal layer; and a plurality of first microlenses formed on the incident substrate. The plurality of first microlenses respectively focus the first light toward a corresponding pixel electrode among the plurality of pixel electrodes. The first angle is smaller than the second angle. The first angle is the angle formed by the first light passing through the first parallel lens relative to the normal at the incident surface of the first liquid crystal panel. The second angle is the angle formed by the first light passing through the first reflector and before passing through the first parallel lens relative to the normal at the incident surface of the first liquid crystal panel.

2. The projector according to claim 1, characterized in that, When the plurality of scan electrodes apply voltage to the corresponding gates of the plurality of transistors, the plurality of signal electrodes input signals to the corresponding sources of the plurality of transistors, and the plurality of pixel electrodes are respectively connected to the drain of any one of the plurality of transistors in a energized manner, When the first liquid crystal panel is viewed from above along the normal direction of the first liquid crystal panel, at least a portion of the semiconductor film constituting the plurality of transistors is covered by a corresponding signal electrode among the plurality of signal electrodes, and the gate of each of the plurality of transistors is configured to overlap the region where the corresponding signal electrode among the plurality of signal electrodes and the corresponding scan electrode among the plurality of scan electrodes intersect.

3. The projector according to claim 1, characterized in that, In the emission substrate, a second microlens is disposed downstream of the first light beam relative to the first microlens, the second microlens causing the first light beam, which has been focused by the first microlens, to diffuse.

4. A projector, characterized in that, have: The first solid-state light source, which emits the first light; A second solid-state light source emits a second light with a wavelength different from the first light; A third solid-state light source emits a third light with a wavelength different from 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 is disposed in the optical path of the first light between the projection lens and the first solid-state light source; A first parallelizing lens is disposed in the optical path of the first light between the projection lens and the first reflector; A first liquid crystal panel is disposed in the optical path of the first light between the projection lens and the first parallelizing lens; as well as A prism, disposed in the 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 onto 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 that is transparent and has an incident surface for the first light to be incident; a plurality of scanning electrodes formed on the incident substrate; and a plurality of signal electrodes formed on the incident substrate and intersecting with the plurality of scanning electrodes respectively. Multiple pixel electrodes are formed on the incident substrate and are adjacent to any one of the intersection points where the multiple scan electrodes and the multiple signal electrodes intersect; A plurality of transistors are formed on the incident substrate and are electrically connected to any one of the plurality of pixel electrodes and to any one of the plurality of signal electrodes; and a plurality of first microlenses are formed on the incident substrate. The emission side substrate includes: an emission substrate that is transparent and has an emission surface for emitting the first light; A common electrode, formed on the emission substrate and disposed opposite to the plurality of pixel electrodes across the first liquid crystal layer, is capable of applying a voltage to the first liquid crystal layer. The plurality of first microlenses respectively focus the first light toward a corresponding pixel electrode among the plurality of pixel electrodes. The first angle is smaller than the second angle. The first angle is the angle formed by the first light passing through the first parallel lens relative to the normal at the incident surface of the first liquid crystal panel. The second angle is the angle formed by the first light passing through the first reflector and before passing through the first parallel lens relative to the normal at the incident surface of the first liquid crystal panel.

5. The projector according to claim 4, characterized in that, When the plurality of scan electrodes apply voltage to the corresponding gates of the plurality of transistors, the plurality of signal electrodes input signals to the corresponding sources of the plurality of transistors, and the plurality of pixel electrodes are respectively connected to the drain of any one of the plurality of transistors in a energized manner, When the first liquid crystal panel is viewed from above along the normal direction of the first liquid crystal panel, at least a portion of the semiconductor film constituting the plurality of transistors is covered by a corresponding signal electrode among the plurality of signal electrodes, and the gate of each of the plurality of transistors is configured to overlap the region where the corresponding signal electrode among the plurality of signal electrodes and the corresponding scan electrode among the plurality of scan electrodes intersect.

6. The projector according to claim 4, characterized in that, In the emission substrate, a second microlens is disposed downstream of the first light beam relative to the first microlens, the second microlens causing the first light beam, which has been focused by the first microlens, to diffuse.

7. The projector according to any one of claims 1 to 6, characterized in that, The area of ​​the first light emitted from the first parallelizing lens is equal to or greater than the area of ​​the region where 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.

8. The projector according to any one of claims 1 to 6, characterized in that, The area from which the first light is emitted from the first parallel lens is equal to or greater than the area of ​​the region where the first liquid crystal layer is disposed when viewing the first liquid crystal panel from the normal direction of the incident surface where the first light is incident on the first liquid crystal panel, and the area of ​​the plurality of pixel electrodes and the plurality of first microlenses overlapping, and the area from which the first light is emitted from the first parallel lens is less than the area of ​​the largest region where the first liquid crystal layer is disposed.

9. The projector according to claim 8, characterized in that, The end of the first reflector that connects to the first parallelizing lens is rectangular in shape. When the first liquid crystal panel is viewed from the normal direction of the incident surface where the first light is incident, the shape of the area where the first liquid crystal layer is disposed is rectangular.

10. The projector according to claim 9, characterized in that, The end of the first reflector is rectangular in shape. The region of the incident surface of the first liquid crystal panel is rectangular in shape. The aspect ratio of the end of the first reflector is equal to the aspect ratio of the region of the incident surface of the first liquid crystal panel.

11. The projector according to claim 10, characterized in that, The area of ​​the first light incident on the first parallelizing lens is equal to the area of ​​the first light exiting from the first parallelizing lens.

12. The projector according to any one of claims 1 to 6, characterized in that, have: A second reflector is disposed in the optical path of the second light between the projection lens and the second solid-state light source; A second parallelizing lens is disposed in the optical path of the second light between the projection lens and the second reflector; A second liquid crystal panel is disposed in the optical path of the second light between the projection lens and the second parallelizing lens; A third reflector is disposed in the optical path of the third light between the projection lens and the third solid-state light source; A third parallelizing lens is disposed in the optical path of the third light between the projection lens and the third reflector; as well as A third liquid crystal panel is disposed in the optical path of the third light between the projection lens and the third parallelizing lens. The second liquid crystal panel includes a second liquid crystal layer. The third liquid crystal panel includes a third liquid crystal layer. The end of the first reflector that connects to the first parallelizing lens is rectangular in shape. The end of the second reflector that connects with the second parallelizing lens is rectangular in shape. The end of the third reflector that connects with the third parallelizing lens is rectangular in shape. When the first liquid crystal panel is viewed along the normal direction relative to the incident surface of the first light incident on the first liquid crystal panel, the shape of the region where the first liquid crystal layer is disposed is rectangular. When the second liquid crystal panel is viewed along the normal direction relative to the incident surface of the second light, the area where the second liquid crystal layer is disposed is rectangular. When the third liquid crystal panel is viewed along the normal direction relative to the incident surface of the third light incident on the third liquid crystal panel, the shape of the area where the third liquid crystal layer is disposed is rectangular.

13. The projector according to claim 12, characterized in that, The shapes of the ends of the first reflector, the second reflector, and the third reflector are all rectangular. The shapes of the regions of the incident surface of the first liquid crystal panel, the second liquid crystal panel, and the third liquid crystal panel are all rectangular. The aspect ratio of the end of the first reflector is equal to the aspect ratio of the region 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 region of the incident surface of the second liquid crystal panel. The aspect ratio of the end of the third reflector is equal to the aspect ratio of the region of the incident surface of the third liquid crystal panel.

14. The projector according to claim 13, characterized in that, The area of ​​the end of the first reflector is equal to or greater 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 greater than the area of ​​the region of the incident surface of the second liquid crystal panel. The area of ​​the end of the third reflector is equal to or greater than the area of ​​the region of the incident surface of the third liquid crystal panel.

15. The projector according to any one of claims 1 to 6, characterized in that, have: A second reflector is disposed in the optical path of the second light between the projection lens and the second solid-state light source; A second parallelizing lens is disposed in the optical path of the second light between the projection lens and the second reflector; A second liquid crystal panel is disposed in the optical path of the second light between the projection lens and the second parallelizing lens; A third reflector is disposed in the optical path of the third light between the projection lens and the third solid-state light source; A third parallelizing lens is disposed in the optical path of the third light between the projection lens and the third reflector; as well as A third liquid crystal panel is disposed in the optical path of the third light between the projection lens and the third parallelizing lens. 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 LEDs arranged on the base. The first reflector shapes the first light emitted by the first solid-state light source into a rectangle. The second reflector shapes the second light emitted by the second solid-state light source into a rectangle. The third reflector shapes the third light emitted by the third solid-state light source into a rectangle.

16. The projector according to any one of claims 1 to 6, characterized in that, have: A second reflector is disposed in the optical path of the second light between the projection lens and the second solid-state light source; A second parallelizing lens is disposed in the optical path of the second light between the projection lens and the second reflector; A second liquid crystal panel is disposed in the optical path of the second light between the projection lens and the second parallelizing lens; A third reflector is disposed in the optical path of the third light between the projection lens and the third solid-state light source; A third parallelizing lens is disposed in the optical path of the third light between the projection lens and the third reflector; as well as A third liquid crystal panel is disposed in the optical path of the third light between the projection lens and the third parallelizing lens. 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 by the first solid-state light source into a rectangle. The second reflector shapes the second light emitted by the second solid-state light source into a rectangle. The third reflector shapes the third light emitted by the third solid-state light source into a rectangle.

17. The projector according to any one of claims 1 to 6, characterized in that, have: A second reflector is disposed in the optical path of the second light between the projection lens and the second solid-state light source; A second parallelizing lens is disposed in the optical path of the second light between the projection lens and the second reflector; A second liquid crystal panel is disposed in the optical path of the second light between the projection lens and the second parallelizing lens; A third reflector is disposed in the optical path of the third light between the projection lens and the third solid-state light source; A third parallelizing lens is disposed in the optical path of the third light between the projection lens and the third reflector; A third liquid crystal panel is disposed in the optical path of the third light between the projection lens and the third parallelizing lens; A first polarizing plate is disposed in the optical path of the first light between the projection lens and the first parallelizing lens; A second polarizing plate is disposed in the optical path of the second light between the projection lens and the second parallelizing lens; as well as A third polarizing plate is disposed in the optical path of the third light between the projection lens and the third parallelizing 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. The first polarizing plate, the second polarizing plate, and the third polarizing plate are all reflective polarizing plates.

18. The projector according to any one of claims 1 to 6, characterized in that, have: A second reflector is disposed in the optical path of the second light between the projection lens and the second solid-state light source; A second parallelizing lens is disposed in the optical path of the second light between the projection lens and the second reflector; A second liquid crystal panel is disposed in the optical path of the second light between the projection lens and the second parallelizing lens; A third reflector is disposed in the optical path of the third light between the projection lens and the third solid-state light source; A third parallelizing lens is disposed in the optical path of the third light between the projection lens and the third reflector; A third liquid crystal panel is disposed in the optical path of the third light between the projection lens and the third parallelizing lens; A first polarizing plate is disposed in the optical path of the first light between the projection lens and the first parallelizing lens; A second polarizing plate is disposed in the optical path of the second light between the projection lens and the second parallelizing lens; as well as A third polarizing plate is disposed in the optical path of the third light between the projection lens and the third parallelizing 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. The first polarizing plate, the second polarizing plate, and the third polarizing plate are all inorganic polarizing plates.

Images