KR20240139988A - Project device and electronic device including the same - Google Patents

Abstract

The embodiment discloses a projector device including: a light source unit; an optical modulator that modulates light emitted from the light source unit; a diffusion unit arranged between the optical modulator and the light source unit; an intermediate lens arranged between the diffusion unit and the light source unit; a first rear lens arranged between the diffusion unit and the optical modulator; and a second rear lens arranged between the first rear lens and the optical modulator, wherein an effective diameter of the first rear lens is larger than an effective diameter of the second rear lens.

Description

PROJECT DEVICE AND ELECTRONIC DEVICE INCLUDING THE SAME

The invention relates to a project device and an electronic device comprising the same.

Virtual Reality (VR) refers to a specific environment or situation, or the technology itself, that is similar to reality but not real, created using artificial technology such as computers.

Augmented Reality (AR) is a technology that synthesizes virtual objects or information into the real environment to make them appear as if they existed in the original environment.

Mixed reality (MR) or hybrid reality refers to the creation of a new environment or new information by combining the virtual world and the real world. In particular, it is called mixed reality when it refers to real-time interaction between things that exist in reality and virtual worlds.

At this time, the created virtual environment or situation stimulates the user's five senses and allows them to freely move between reality and imagination by experiencing spatial and temporal experiences similar to reality. In addition, users can interact with things implemented in this environment by not only simply immersing themselves in this environment, but also using real devices to operate or give commands.

Recently, research on the equipment (gear, device) used in these technical fields has been actively conducted. However, the need for miniaturization and improvement of optical performance of these equipment is emerging.

The embodiment provides a projector device and an electronic device that provide easily mixed white light to a light modulator by arranging a diffusion portion at the position of an aperture or stop when using a projector device used for AR (Augmented Reality) and an electronic device including the same.

In addition, a projector device and electronic device can be provided that are miniaturized and compact through the light source and diffusion part of one panel.

In addition, it is possible to provide project devices and electronic devices with improved performance through different effective diameters between each component.

The problem to be solved in the embodiment is not limited to this, and it can be said that the purpose or effect that can be understood from the solution or embodiment of the problem described below is also included.

A projector device according to an embodiment includes a light source unit; an optical modulator that modulates light emitted from the light source unit; a diffusion unit arranged between the optical modulator and the light source unit; an intermediate lens arranged between the diffusion unit and the light source unit; a first rear lens arranged between the diffusion unit and the optical modulator; and a second rear lens arranged between the first rear lens and the optical modulator; wherein an effective diameter of the first rear lens is larger than an effective diameter of the second rear lens.

The effective diameter of the reflection side of the first rear lens may be larger than the effective diameter of the light source side of the second rear lens.

The effective diameter of the reflection side of the first rear lens may have a ratio of 1:3.4 to 1:4.1 to the light source side of the second rear lens.

It may include a reflector arranged between the second rear lens and the light modulator; and a prism arranged between the light modulator and the reflector.

The separation distance between the diffusion unit and the first rear lens may be greater than at least one of the separation distance between the intermediate lens and the diffusion unit, the separation distance between the first rear lens and the second rear lens, and the separation distance between the second rear lens and the reflector.

The separation distance between the above diffusion portion and the first rear lens may be 1 mm to 5 mm.

The size of the above diffusion portion may be smaller than the maximum effective diameter of at least one of the intermediate lens and the first rear lens.

The effective diameter of the first rear lens may be larger than the effective diameter of the reflector.

The refractive index of the intermediate lens may be lower than the refractive indices of the first rear lens and the second rear lens.

The above diffusion portion may be positioned at or adjacent to the stop.

The light source side of the above intermediate lens may be convex or concave toward the light source.

The reflective side of the above intermediate lens may be convex toward the reflective side.

The size of the radius of curvature of the light source side of the above intermediate lens may be larger than the size of the radius of curvature of the reflection side of the above intermediate lens.

The light source side surface of the first rear lens may be convex toward the light source.

The reflective side surface of the first rear lens may be convex toward the reflective side.

The embodiment implements a projector device and an electronic device that provide easily mixed white light to a light modulator by arranging a diffusion part at a stop position when using a projector device used for AR (Augmented Reality) and an electronic device including the same.

In addition, it is possible to implement miniaturized and compact projector devices and electronic devices through the light source and diffusion section of one panel.

Additionally, project devices and electronic devices with improved performance can be implemented through different effective diameters between each component.

The various advantageous and beneficial effects of the present invention are not limited to the above-described contents, and will be more easily understood in the course of explaining specific embodiments of the present invention.

Figure 1 is a block diagram showing the configuration of an extended reality electronic device according to an embodiment of the present invention.
FIG. 2 is a perspective view of an augmented reality electronic device according to an embodiment of the present invention;
Figure 3 is a perspective view of a project device according to an embodiment;
Figure 4 is an exploded perspective view of a project device according to an embodiment;
Figure 5 is a drawing taken along line AA' in Figure 3.
Figures 6 and 7 are drawings of a project device according to an embodiment with the housing removed;
Figure 8 is an optical system for a lighting system in a project device according to the first embodiment of the present invention.
Figure 9 is an optical system for a lighting system in a project device according to the second embodiment of the present invention.
Fig. 10 is an optical system for an illumination system in a project device according to a third embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

However, the technical idea of the present invention is not limited to some of the embodiments described, but can be implemented in various different forms, and within the scope of the technical idea of the present invention, one or more of the components among the embodiments can be selectively combined or substituted for use.

In addition, terms (including technical and scientific terms) used in the embodiments of the present invention can be interpreted as having a meaning that can be generally understood by a person of ordinary skill in the technical field to which the present invention belongs, unless explicitly and specifically defined and described, and terms that are commonly used, such as terms defined in a dictionary, can be interpreted in consideration of the contextual meaning of the relevant technology.

Additionally, the terms used in the embodiments of the present invention are for the purpose of describing the embodiments and are not intended to limit the present invention.

In this specification, the singular may also include the plural unless specifically stated otherwise in the phrase, and when it is described as "A and/or at least one (or more) of B, C", it may include one or more of all combinations that can be combined with A, B, C.

Additionally, in describing components of embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used.

These terms are only intended to distinguish one component from another and are not intended to limit the nature, order, or sequence of the component.

And, when a component is described as being 'connected', 'coupled' or 'connected' to another component, it may include not only cases where the component is directly connected, coupled or connected to the other component, but also cases where the component is 'connected', 'coupled' or 'connected' by another component between the component and the other component.

In addition, when described as being formed or arranged "above or below" each component, above or below includes not only the case where the two components are in direct contact with each other, but also the case where one or more other components are formed or arranged between the two components. In addition, when expressed as "above or below", it can include the meaning of the downward direction as well as the upward direction based on one component.

FIG. 1 is a block diagram showing the configuration of an extended reality electronic device according to an embodiment of the present invention.

Referring to FIG. 1, the extended reality electronic device (20) may include a wireless communication unit (21), an input unit (22), a sensing unit (23), an output unit (24), an interface unit (25), a memory (26), a control unit (27), and a power supply unit (28). The components illustrated in FIG. 1 are not essential for implementing the electronic device (20), and thus, the electronic device (20) described in this specification may have more or fewer components than the components listed above.

More specifically, among the above components, the wireless communication unit (21) may include one or more modules that enable wireless communication between the electronic device (20) and a wireless communication system, between the electronic device (20) and another electronic device, or between the electronic device (20) and an external server. In addition, the wireless communication unit (21) may include one or more modules that connect the electronic device (20) to one or more networks.

This wireless communication unit (21) may include at least one of a broadcast reception module, a mobile communication module, a wireless Internet module, a short-range communication module, and a location information module.

The input unit (22) may include a camera or a video input unit for inputting a video signal, a microphone or an audio input unit for inputting an audio signal, and a user input unit (e.g., a touch key, a mechanical key, etc.) for receiving information from a user. Voice data or image data collected by the input unit (22) may be analyzed and processed into a user's control command.

The sensing unit (23) may include one or more sensors for sensing at least one of information within the electronic device (20), information about the surrounding environment surrounding the electronic device (20), and user information.

For example, the sensing unit (23) may include at least one of a proximity sensor, an illumination sensor, a touch sensor, an acceleration sensor, a magnetic sensor, a G-sensor, a gyroscope sensor, a motion sensor, an RGB sensor, an infrared sensor (IR sensor), a finger scan sensor, an ultrasonic sensor, an optical sensor (e.g., a photographing device), a microphone, a battery gauge, an environmental sensor (e.g., a barometer, a hygrometer, a thermometer, a radiation detection sensor, a heat detection sensor, a gas detection sensor, etc.), and a chemical sensor (e.g., an electronic nose, a healthcare sensor, a biometric recognition sensor, etc.). Meanwhile, the electronic device (20) disclosed in the present specification may utilize information sensed by at least two or more of these sensors in combination.

The output unit (24) is for generating output related to vision, hearing, or tactile sensations, and may include at least one of a display unit, an audio output unit, a haptic module, and an optical output unit. The display unit may be formed as a layer structure with a touch sensor or formed as an integral part, thereby implementing a touch screen. This touch screen may function as a user input means that provides an input interface between the augmented reality electronic device (20) and the user, and at the same time, provide an output interface between the augmented reality electronic device (20) and the user.

The interface unit (25) serves as a passageway between various types of external devices connected to the electronic device (20). Through the interface unit (25), the electronic device (20) can receive virtual reality or augmented reality content from an external device, and can perform mutual interaction by exchanging various input signals, sensing signals, and data.

For example, the interface unit (25) may include at least one of a wired/wireless headset port, an external charger port, a wired/wireless data port, a memory card port, a port for connecting a device equipped with an identification module, an audio I/O (Input/Output) port, a video I/O (Input/Output) port, and an earphone port.

In addition, the memory (26) stores data that supports various functions of the electronic device (20). The memory (26) can store a plurality of application programs (or applications) that run on the electronic device (20), data for the operation of the electronic device (20), and commands. At least some of these application programs can be downloaded from an external server via wireless communication. In addition, at least some of these application programs can exist on the electronic device (20) from the time of shipment for basic functions of the electronic device (20) (e.g., incoming and outgoing call functions, message reception and outgoing functions).

In addition to operations related to the application program, the control unit (27) typically controls the overall operation of the electronic device (20). The control unit (27) can process signals, data, information, etc. input or output through the components discussed above.

In addition, the control unit (27) can control at least some of the components by driving the application program stored in the memory (26) to provide appropriate information to the user or process a function. Furthermore, the control unit (27) can operate at least two or more of the components included in the electronic device (20) in combination with each other to drive the application program.

In addition, the control unit (27) can detect the movement of the electronic device (20) or the user by using a gyroscope sensor, a gravity sensor, a motion sensor, etc. included in the sensing unit (23). Alternatively, the control unit (27) can detect an object approaching the electronic device (20) or the user by using a proximity sensor, a light sensor, a magnetic sensor, an infrared sensor, an ultrasonic sensor, a light sensor, etc. included in the sensing unit (23). In addition, the control unit (27) can also detect the movement of the user by using sensors provided in a controller that operates in conjunction with the electronic device (20).

Additionally, the control unit (27) can perform operations (or functions) of the electronic device (20) using an application program stored in the memory (26).

The power supply unit (28) receives external power or internal power under the control of the control unit (27) and supplies power to each component included in the electronic device (20). The power supply unit (28) includes a battery, and the battery may be provided in a built-in or replaceable form.

At least some of the above components may operate in cooperation with each other to implement the operation, control, or control method of the electronic device according to various embodiments described below. In addition, the operation, control, or control method of the electronic device may be implemented on the electronic device by driving at least one application program stored in the memory (26).

Hereinafter, an electronic device described as an example of the present invention will be described based on an embodiment applied to an HMD (Head Mounted Display). However, embodiments of the electronic device according to the present invention may include a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a PDA (personal digital assistants), a PMP (portable multimedia player), a navigation, a slate PC, a tablet PC, an ultrabook, and a wearable device. In addition to an HMD, the wearable device may include a smart watch, a contact lens, VR/AR/MR Glass, and the like.

FIG. 2 is a perspective view of an augmented reality electronic device according to an embodiment of the present invention.

As illustrated in FIG. 2, an electronic device according to an embodiment of the present invention may include a frame (100), a projector device (200), and a display unit (300).

The electronic device may be provided as a glass type (smart glass). The glass type electronic device is configured to be worn on the head of the human body and may be provided with a frame (case, housing, etc.) (100) for this purpose. The frame (100) may be formed of a flexible material to facilitate wearing.

The frame (100) is supported on the head and provides a space for mounting various components. As illustrated, electronic components such as a projector device (200), a user input unit (130), or an audio output unit (140) may be mounted on the frame (100). In addition, a lens covering at least one of the left and right eyes may be detachably mounted on the frame (100).

The frame (100) may have a form of glasses worn on the face of the user's body as shown in the drawing, but is not necessarily limited thereto, and may also have a form such as goggles worn in close contact with the user's face.

Such a frame (100) may include a front frame (110) having at least one opening, and a pair of side frames (120) that extend in the y direction (in FIG. 2) intersecting the front frame (110) and are parallel to each other.

The frame (100) may have the same or different length (DI) in the x direction and length (LI) in the y direction.

The project device (200) is provided to control various electronic components provided in an electronic device. The project device (200) may be used interchangeably with ‘optical output device’, ‘optical projector device’, ‘light irradiation device’, ‘optical device’, etc.

The projector device (200) can generate an image or a video of a series of images that are displayed to the user. The projector device (200) can include an image source panel that generates an image and a plurality of lenses that diffuse and converge light generated from the image source panel.

The project device (200) may be secured to either of the two side frames (120). For example, the project device (200) may be secured to the inside or outside of either of the side frames (120), or may be integrally formed by being built into the inside of either of the side frames (120). Alternatively, the project device (200) may be secured to the front frame (110) or may be provided separately from the electronic device.

The display unit (300) may be implemented in the form of a head mounted display (HMD). The HMD form refers to a display method that is mounted on the head and directly shows an image in front of the user's eyes. When the user wears the electronic device, the display unit (300) may be positioned to correspond to at least one of the left and right eyes so that the image can be directly provided in front of the user's eyes. In this drawing, the display unit (300) is positioned in a portion corresponding to the right eye so that the image can be output toward the user's right eye. However, as described above, it is not limited thereto and may be positioned for both the left and right eyes.

The display unit (300) can allow the user to visually perceive the external environment while simultaneously allowing the user to see an image generated by the projector device (200). For example, the display unit (300) can project an image onto the display area using a prism.

And the display unit (300) may be formed to be translucent so that the projected image and the general field of view in front (the range that the user sees through his eyes) can be viewed simultaneously. For example, the display unit (300) may be translucent and formed of an optical member including glass.

And the display unit (300) may be inserted and fixed into an opening included in the front frame (110), or may be positioned on the back surface of the opening (i.e., between the opening and the user) and fixed to the front frame (110). In the drawing, the display unit (300) is positioned on the back surface of the opening and fixed to the front frame (110) as an example, but the display unit (300) may be positioned and fixed at various positions of the frame (100).

As illustrated in FIG. 2, when the electronic device projects image light from the projector device (200) to one side of the display unit (300), the image light is emitted to the other side through the display unit (300), allowing the user to see the image generated from the projector device (200).

Accordingly, the user can view the external environment through the opening of the frame (100) and at the same time view the image generated by the projector device (200). That is, the image output through the display unit (300) can be seen to overlap with the general field of view. By utilizing these display characteristics, the electronic device can provide augmented reality (AR) that superimposes a virtual image on a real image or background and shows it as a single image.

Furthermore, in addition to these drives, images generated from the external environment and the projector device (200) can be provided to the user with a time difference for a short period of time that is not recognized by the person. For example, in one frame, the external environment can be provided to the person in one section, and images from the projector device (200) can be provided to the person in another section.

Alternatively, both overlap and time difference may be provided.

In addition, the projector device according to the embodiment may have the structure described below, or may be formed of a structure further including a waveguide or/and glass in the structure. In addition, the projector device may include a digital micromirror device (DMD) projector or projector device.

FIG. 3 is a perspective view of a project device according to an embodiment, FIG. 4 is an exploded perspective view of a project device according to an embodiment, and FIG. 5 is a view taken along line AA’ in FIG. 3.

Referring to FIGS. 3 to 5, a projector device (200) according to an embodiment may include a housing (210), a light source unit (220), an intermediate lens (230), a diffusion unit (240), a rear lens group (250), a reflection unit (260), an additional lens (263), a prism (270), a light modulator (280), a projection lens unit (290), and a blocking member (TP).

The housing (210) may have a space or housing groove in which each component of the projector device (200) is accommodated or placed. The housing (210) may be located on the outside of the projector device (200). For example, a light source unit (220), an intermediate lens (230), a diffusion unit (240), a rear lens group (250), a reflection unit (260), an additional lens (263), a prism (270), a light modulator (280), and a projection lens unit (290) may be placed in the housing (210).

In addition, the housing (210) may have a structure in which one side is opened. Accordingly, each of the components described above may be assembled through the opened area or surface. Furthermore, a blocking member (TP) described later may be placed in the opened area or surface of the housing (210).

The housing (210) may have various shapes. For example, the housing (210) may have a hexahedral structure. Accordingly, the project device according to the embodiment can be easily mounted on an electronic device. In addition, the project device according to the embodiment can be easily miniaturized or compactized.

The light source unit (220) may be placed within the housing (210). The light source unit (220) may be placed adjacent to any one of the outer surfaces of the housing (210).

The light source unit (220) may include at least one light source. In an embodiment, the light source unit (220) may include one light source. For example, the light source unit (220) may use a light source formed of one panel. That is, the light source unit (220) may include a light source of one panel formed of light sources that emit red, green, and blue light.

As another example, when the light source unit (220) is composed of multiple light sources, the multiple light sources may be positioned adjacent to each other on different surfaces. And the multiple light sources may emit light of different wavelength bands or colors. For example, the multiple light sources may emit light of a green wavelength, or light of red and blue. For example, the light of red, green, and blue from each light source may correspond to light of a central wavelength.

In addition, in the projector device according to the embodiment, the first direction may correspond to the ‘X-axis direction’ in the drawing. It may correspond to the direction from the light source unit (220) toward the projection lens unit (290). Furthermore, the second direction may correspond to the Y-axis direction in the drawing. The second direction may be a direction perpendicular to the first direction. The third direction may be a direction perpendicular to the first direction and the second direction. And the third direction may correspond to the ‘Z-axis direction’ in the drawing.

The intermediate lens (230) may be positioned adjacent to the light source unit (220). The intermediate lens (230) may be positioned on the first direction (X-axis direction) side of the light source unit (220). Alternatively, the intermediate lens (230) may be positioned on the light source unit (220) in the emission direction side of the light source unit (220).

And the intermediate lens (230) can be placed between the diffusion unit (240) and the light source unit (220).

The diffusion unit (240) may be spaced apart from the intermediate lens (230). The intermediate lens (230) is positioned between the diffusion unit (240) and the light source unit (220), and the diffusion unit (240) may be positioned between the intermediate lens (230) and the rear lens group (250). In addition, the diffusion unit (240) may be positioned between the intermediate lens (230) and the prism (270). In addition, the diffusion unit (240) may be positioned between the intermediate lens (230) and the light modulator (280). Alternatively, the diffusion unit (240) may be positioned between the light source unit (220) and the light modulator (280).

And in the projector device according to the embodiment, the position of the stop may be located between the light source unit (220) and the light modulator (280). The position of the stop may be located at the rear end of the intermediate lens (230). In particular, the position of the stop may be located between the intermediate lens (230) and the rear lens group (250). Accordingly, the optical stop or stop may be an area where light or a bundle of light is gathered (or an area where they intersect). Accordingly, the position of the stop may correspond to a portion where light of different wavelengths intersects each other. For example, the stop may correspond to the position of the aperture. The stop may be an aperture stop, a field stop, etc. In this way, the light or rays of each color emitted from the light source (220) can be combined into one area and provided to the light modulator (280) through the diffusion unit (240). That is, miniaturization of the projector device through light collection is more easily realized, and even when using a light source of one panel, the light bundle is collected and emitted through the diffusion unit, so that light loss can be suppressed even with miniaturization.

Furthermore, the position of the stop may exist in each of the illumination system and the projection system. In the embodiment, the position of the stop is described based on the illumination system.

The diffusion unit (240) may be a diffuser. For example, the diffusion unit (240) may include a micro lens array. Accordingly, the diffusion unit (240) may provide white light through diffuse reflection, etc. Furthermore, the diffusion unit (240) may be positioned adjacent to or on the position of the stop, so as to effectively diffuse the collected three-color light into white light.

The rear lens group (250) may be positioned at the rear end of the diffusion unit (240). Accordingly, the diffusion unit (240) may be positioned between the rear lens group (250) and the intermediate lens (230).

Furthermore, the rear lens group (250) may be positioned between the diffusion unit (240) and the light modulator (280). Also, the rear lens group (250) may be positioned between the diffusion unit (240) (or light source unit, intermediate lens) and the prism (or reflector).

The rear lens group (250) may include a first rear lens (251) and a second rear lens (252). The second rear lens (252) may be positioned at the rear end of the first rear lens (251). In addition, the first rear lens (251) may be positioned between the diffusion unit (240) and the light modulator (or reflector). In addition, the second rear lens (252) may be positioned between the first rear lens (251) and the light modulator (or reflector).

The intermediate lens (230) and the rear lens group (250) may include relay lenses and/or collimator lenses. For example, the intermediate lens (230) may be a collimator lens. And the rear lens group (250) may be a relay lens.

The reflector (260) may be positioned at the rear end of the rear lens group (250). The reflector (260) may be positioned on the first direction (X-axis direction) side of the rear lens group (250). The reflector (260) may be spaced apart from the rear lens group (250) in the first direction. The reflector (260) may be positioned between the rear lens group (250) and the prism (270) (or light modulator).

And the reflector (260) can be tilted at a predetermined angle with respect to the rear lens group (250). The reflector (260) can reflect light transmitted from the rear lens group (250). For example, light passing through the rear lens group (250) can be reflected by the reflector (260), and the light path can be directed toward the projection lens unit and then reflected toward the prism or light modulator below.

The reflector (260) can be tilted at a predetermined angle with respect to the rear lens group (250) or the first direction, etc. By this configuration, the length of the projector device according to the embodiment can be minimized in the second direction.

The additional lens (263) may be positioned at the rear end of the reflector (260). However, it may not be present as shown. The additional lens (263) may be positioned at the lower end of the reflector (260). The additional lens (263) may overlap at least partially with the reflector (260) in the second direction.

The additional lens (263) may include a relay lens. The additional lens (263) may transmit light reflected from the reflector (260). The additional lens (263) may transmit light from one location to another. That is, the additional lens (263) may align or change the path of the light. Furthermore, the additional lens (263) may adjust the size of the light or image (maximum area of the light) provided by the illumination system, or compensate for optical differences.

The prism (270) may be positioned at the rear end of the rear lens group (250). In addition, the prism (270) may be positioned at the rear end of the additional lens (263). In addition, the prism (270) may be positioned between the rear lens group (250) and the light modulator (280). In addition, the prism (270) may be positioned between the reflector (260) and the light modulator (280). Furthermore, the prism (270) may be positioned below the additional lens (263) or the reflector (260). The prism (270) may partially overlap with the additional lens (263) or the reflector (260) in the second direction. In addition, the prism (270) may not overlap with the additional lens (263) or the reflector (260) in the second direction in some areas. By this configuration, the prism (270) can transmit light emitted (or transmitted) from the additional lens (263), and the transmitted light can be incident on the light modulator (280) and reflected back to the projection lens unit (290).

The prism (270) may include a total internal reflection prism (TIR prism). The prism (270) may change the direction of propagation of light as described above. That is, the prism (270) may perform transmission and reflection of light. Specifically, the prism (270) may transmit light emitted (or transmitted) from the reflection unit (260) (or additional lens (263)) and reflect light emitted from the light modulator (280). In addition, the prism (270) may transmit light emitted from the light source unit (220) and reflect light emitted from the light modulator (280). For example, the prism (270) may reflect light emitted from the light modulator (280) to the projection lens unit (290). Accordingly, the path of light or the direction of light propagation may correspond to the first direction, change to the opposite direction of the second direction at the reflector (260), and then be converted back toward the first direction or the projection lens unit. By this configuration, miniaturization of the projector device according to the embodiment may be achieved.

The prism (270) may be positioned behind the prism (270) in the illumination system. And the prism (270) may be positioned behind the light modulator (280) in the projection system. In other words, the light emitted from the light source may pass through the intermediate lens (230), the diffusion unit (240), the rear lens group (250), the reflection unit (260), (additional lens (263)), the prism (270), the light modulator (280), the prism (270), and the projection lens unit (290) and finally be provided to the screen or waveguide (display unit).

Accordingly, a prism (270) on the optical path may be placed between the optical modulator (280) and the projection lens unit (290). Additionally, the prism (270) may be placed between the additional lens (263) and the optical modulator (280).

And the light modulator (280) can reflect the incident light to project an image. For example, the light modulator (280) can emit or project an image or image based on an image signal that is incident through the substrate (SB). That is, the light modulator (280) can modulate the light emitted from the light source unit (220).

The optical modulator (280) according to the embodiment may include a digital micromirror device (DMD). And the optical modulator (280) may project an image by applying different weights to light of each wavelength. As an embodiment, the optical modulator (280) may include a plurality of small mirrors. For example, each mirror may reflect or block light according to a signal (e.g., a digital signal). In other words, the optical modulator (280) may control the state of each mirror based on an image signal applied through the substrate (SB) to project or project an image (or image) corresponding to the image signal. For example, when light is reflected by the control of the mirror, a bright image area may be output, and when light is blocked, a dark image area may be output.

The projection lens unit (290) may be placed at the rear end of the prism (270) and the light modulator (280). When light emitted from the light modulator (280) is reflected by the prism (270), the light reflected by the prism (270) may be incident on the projection lens unit (290). The light described above may be projected from the projection lens unit (290). The projection lens unit (290) may project the light emitted from the projector device onto a screen or waveguide (or display unit).

In an embodiment, the projection lens unit (290) can adjust the size of the image so that light is incident within the effective stop diameter (entrance pupil diameter, EPD) of the waveguide or the like.

To this end, the projection lens unit (290) according to the embodiment may include a lens barrel (291) and a plurality of lenses (L1 to L4) (or optical systems) arranged within the lens barrel.

The plurality of lenses (L1 to L4) may at least partially overlap the prism (270) in the first direction.

The blocking member (TP) may be arranged on one outer surface of the housing (210). Accordingly, it may be arranged on the outer surface of each component after each component is accommodated in the housing (210). As an example, it may be arranged on one side of the housing (210) corresponding to a groove of the housing (210). And the blocking member (TP) may cover each component. With this configuration, the blocking member (TP) may easily block foreign substances or light from entering the components of the housing (210). Accordingly, image projection of an electronic device or a projector may be implemented more accurately.

Additionally, the project device (200) according to the embodiment may include a substrate (SB), fastening members (SC1, SC2), and reinforcing plates (ST1, ST2).

The substrate (SB) can be electrically connected to the light source unit (220) and the light modulator (280). The light source unit (220) and the light modulator (280) can be placed on the substrate (SB). And the substrate (SB) can be placed in the housing (210). For example, the substrate (SB) can be placed along the outer surface of the housing (210).

The operation of the light modulator (280) and the light source unit (220) can be controlled through the substrate (SB). The substrate (SB) can communicate with a control unit of an external device, etc., wirelessly or by wire. For example, an external control signal can be transmitted to the projector device through the substrate (SB). And the projector device can output an image based on the transmitted control signal.

The fastening members (SC1, SC2) may be arranged on the outside of the substrate (SB). Accordingly, the bonding strength between the substrate (SB), the housing (210), the light source unit (220), and the light modulator (280) may be improved. Furthermore, the substrate (SB) may be arranged on the outside of the housing (210), thereby improving the freedom of assembly or design.

The reinforcing plates (ST1, ST2) may be arranged on the outside of the substrate (SB). Furthermore, the reinforcing plates (ST1, ST2) may be made of various materials such as metal, composite materials, and resin (plastic) as a stiffener. The reinforcing plates (ST1, ST2) may be arranged on the outside of the substrate (SB) to improve the rigidity and strength of the substrate (SB) and the housing. For example, they may be arranged on the substrate (SB) corresponding to the positions of the light source unit (220) and the light modulator (280). By this configuration, deformation due to heat generated by the light source unit (220) and the light modulator (280), etc., may be suppressed. Furthermore, the reinforcing plates (ST1, ST2) may protect the projector device from external impact, etc. In addition, the fastening members (SC1, SC2) may penetrate the reinforcing plates (ST1, ST2). For example, each fastener can penetrate each reinforcing plate to improve the bonding strength between the substrate and the housing (210).

As a variation, the reinforcing plate may be formed integrally rather than in multiple pieces corresponding to the substrate (SB). That is, the reinforcing plate may have a structure extending from the light source unit (220) to the light modulator (280).

In addition, the substrates may be arranged respectively corresponding to each light source and light modulator. In addition, the fastening members may be arranged respectively on each of the plurality of substrates. Or, each of the fastening members may penetrate all of the plurality of substrates. Accordingly, the plurality of substrates may be joined to each other with one fastening member. Accordingly, the number of fastening members may be variously set to an odd number or an even number.

Figures 6 and 7 are drawings of a project device according to an embodiment with the housing removed.

A projector device according to an embodiment may include an illuminating system and a projecting system (or a projecting system, a projecting unit, a projection unit, a projection unit, etc.).

Referring to FIG. 6, the project device may include an illumination system. According to an embodiment, the illumination system may include a housing (210), a light source unit (220), an intermediate lens (230), a diffusion unit (240), a rear lens group (250), a reflection unit (260), an additional lens (263), and a prism (270). Furthermore, light emitted from the prism (270) in the illumination system may be incident on a light modulator (280). Accordingly, the illumination system may include up to the light modulator (280).

This lighting system includes a prism (270) as a component, and can receive light from a light source (illumination light) and emit light in a predetermined direction. The illumination light can be transmitted or provided to a light modulator (280) of the projection system.

Referring further to FIG. 7, the projection system may include a prism (270), a light modulator (280), and a projection lens unit (290). The projection system may include the prism (270) as a component. In an embodiment, the prism (270) may be an element of the illumination system and the projection system. Furthermore, the projection system may modulate illumination light generated in the illumination system through the light modulator (280) and emit or diverge in a predetermined direction through the prism (270) and the projection lens unit (290).

And in the projector device, the light modulator (280) reflects the illumination light into patterned light, etc., and the patterned light can pass through the projection lens unit (290) and be output to the outside of the projector device.

Additionally, an optical folding member may be present between the output of the project device and the input of the waveguide or waveguide. The optical folding member may be formed to fold the optical path of the patterned light in at least two different directions.

Figure 8 is an optical system for an illumination system in a project device according to the first embodiment of the present invention.

Referring to FIG. 8, in a projector device according to one embodiment, an optical system (10A) includes a light source unit (220) from which light is emitted, an intermediate lens (230), a diffusion unit (240), a rear lens group (250), a reflection unit (260), an additional lens (263), and a prism (270), and an optical modulator (280) positioned at the rear end of the prism (270) and onto which light is incident can correspond to an image in the optical system.

In this project device, the position of the stop is located between the light source (220) and the light modulator (280), and in particular, the diffusion unit (240) can be placed at the position of the stop. Accordingly, light or a light bundle emitted from the light source is collected at the position of the diffusion unit (240), and can be easily mixed through the diffusion unit (240) to provide white light to the light modulator. Accordingly, size reduction can be easily achieved by using a light source composed of one panel. In addition, the propagation angle of the light bundle passing through the intermediate lens can be newly designed due to the diffusion unit (240). That is, the diffusion unit (240) can be used as a virtual plane.

In addition, the intermediate lens (230) may include a light source side surface (S1) of the intermediate lens and a reflection side surface (S2) of the intermediate lens. The light source side surface (S1) of the intermediate lens may be a surface of the intermediate lens (230) facing the light source (220). The reflection side surface (S2) of the intermediate lens may be a surface of the intermediate lens (230) facing the light modulator (280). Furthermore, the light source side surface described below corresponds to a surface of the corresponding component facing the light source. The reflection side surface corresponds to a surface of the corresponding component facing the reflection.

In the rear lens group (250), the first rear lens (251) may include a light source side surface (S3) and a reflection side surface (S4). The light source side surface (S3) of the first rear lens may be a surface facing the light source (220) in the rear lens group (250). The reflection side surface (S4) of the first rear lens may be a surface facing the light modulator (280) in the rear lens group (250).

And in the rear lens group (250), the second rear lens (252) may include a light source side surface (S5) and a reflection side surface (S6). The light source side surface (S5) of the first rear lens may be a surface facing the light source (220) in the rear lens group (250). The reflection side surface (S6) of the first rear lens may be a surface facing the light modulator (280) in the rear lens group (250).

In addition, in the embodiment, the effective diameter of the first rear lens (251) may be larger than the effective diameter of the second rear lens (252). The effective diameter of at least one of the light source side surface (S3) and the reflection side surface (S4) of the first rear lens (251) may be larger than the effective diameter of at least one of the light source side surface (S5) and the reflection side surface (S6) of the second rear lens (252). For example, the effective diameter of the reflection side surface (S2) of the first rear lens (251) may be larger than the light source side surface (S3) of the second rear lens (252).

By this configuration, effective diameter control is achieved through the first rear lens (251), so the effective diameter size of the second rear lens (252) can be made small, thereby providing the effect of improving aberration performance.

Furthermore, the effective diameter of the reflection side (S2) of the first rear lens (251) may have a ratio of 1:3.4 to 1:4.1 to the effective diameter of the light source side (S3) of the second rear lens (252). If the ratio is less than 1:1.34, aberration performance deteriorates, and if it is greater than 1:4.1, there is a limitation that it is difficult to manufacture the second rear lens.

Furthermore, in the project device according to the embodiment, each component can be applied with the contents of Table 1 (component information) and Table 2 (aspherical data) below.

Element or surface Surface type Y Radius Thickness Index Abbe semi-aperture Light source Sphere infinity 4.980 - - 0.500 Intermediate lens (S1) Asphere -46.444 3.000 1.497 81.55 1.584 Intermediate lens (S2) Asphere -3.366 0.020 - - 2.050 Diffuser Sphere infinity (0.4)TBD - - 2.000 Air Asphere infinity 5.000 - - 2 1st rear lens (S3) Asphere 3.403 1.093 1.69678 55.46 2.114 1st rear lens (S4) Asphere -31.743 2.741 - - 2.030 Air Sphere infinity 0.207 - - 0.560 Second rear lens (S5) Asphere -1.544 0.959 1.6385 55.17 0.593 Second rear lens (S6) Asphere -1.390 1.700 - - 0.931 mirror Sphere infinity 0.020 - - 1.607 Air Sphere infinity 0.880 - - 1.594 Air Sphere infinity 4.999 - - 1.101 DMD (DMD) Sphere infinity 0.000 - - 1.992

Attribute name Intermediate lens (S1) Intermediate lens (S2) 1st rear lens (S3) 1st rear lens (S4) Second rear lens (S5) Second rear lens (S6) Y Radius -46.4441665 -3.36574302 3.156033619 116.6128589 -1.62065146 -1.45745607 Conic Constant (K) 9.916248105 -5.86655125 -0.32152471 2440.381269 0 0.029118354 4th Order Coefficient (A) -0.00489658 -0.01852371 -0.00135862 -0.00032918 -4.25E-02 -0.01058586 6th Order Coefficient (B) -0.00031294 0.003316493 -9.41E-05 -6.49E-05 -0.33969245 -1.20E-02 8th Order Coefficient (C) 0.000947377 -0.0010524 -1.53E-06 -1.11E-05 5.58E-01 3.55E-03 10th Order Coefficient (D) -0.00092766 0.000302912 7.34E-07 -5.30E-07 1.45E-01 7.92E-03 12th Order Coefficient (E) 0.000213995 -4.60E-05 -9.16E-08 1.25E-07 -2.39E+00 -1.73E-02 14th Order Coefficient (F) 4.54E-05 -1.70E-06 0.00E+00 0.00E+00 0 0 16th Order Coefficient (G) -4.09E-06 7.38E-07 0.00E+00 0.00E+00 0 0 18th Order Coefficient (H) -9.39E-06 1.78E-07 0.00E+00 0.00E+00 0 0 20th Order Coefficient (J) 1.66E-06 -3.43E-08 0.00E+00 0.00E+00 0 0

Here, the thickness of the left side or the light source side of the intermediate lens and the first rear lens means the thickness (refractive index, Abbe number, etc.) of the intermediate lens and the first rear lens (or the second rear lens). The thickness of the right side or the light modulator side of the intermediate lens and the first rear lens means the separation distance from the next component. In addition, 'Air' is an additional separation distance between two adjacent elements. Therefore, the separation distance between the first rear lens and the second rear lens may be 2.948 mm (2.741 + 0.207). Furthermore, the unit for thickness and length may be mm. In addition, the thickness of the diffusion part and the reflection part means the separation distance from the rear component. As an example, the distance (D1 + D2) from the light source part (220) to the reflection part side (S2) of the intermediate lens may be 5.5 mm to 9 mm. At this time, if the distance (D1+D2) from the light source (220) to the reflective side (S2) of the intermediate lens is less than 5.5 mm, assembly is difficult, and if the distance (D1+D2) from the light source (220) to the reflective side (S2) of the intermediate lens is greater than 9 mm, miniaturization is difficult.

The thickness (D2) of the intermediate lens (230) may be smaller than the distance (D1) from the light source unit (220) to the light source unit side surface (S1) of the intermediate lens. In addition, the thickness (D2) of the intermediate lens (230) may be changed in various ways. For example, the thickness (D2) of the intermediate lens (230) may be smaller than the thickness (D6) of the first rear lens or the thickness (D8) of the second rear lens.

And the reflection side (S2) of the intermediate lens (230) can be spaced apart from the diffusion side (240). For example, the distance (D3) between the diffusion side (240) and the reflection side (S2) of the intermediate lens of the intermediate lens (230) can be 15 ㎛ to 100 ㎛. Preferably, the distance (D3) between the diffusion side (240) and the reflection side (S2) of the intermediate lens of the intermediate lens (230) can be 15 ㎛ to 50 ㎛.

And the distance (D3) between the reflective side (S2) of the intermediate lens (230) and the diffusion part (240) may be smaller than the distance (D5) between the diffusion part (240) and the rear lens group (250).

In addition, the thickness (D4) of the diffusion portion (240) may be smaller than the distance (D3) between the diffusion portion (240) and the reflective side surface (S2) of the intermediate lens of the intermediate lens (230). However, depending on the thickness (D4) of the diffusion portion (240), the distance (D3) between the diffusion portion (240) and the reflective side surface (S2) of the intermediate lens of the intermediate lens (230) may be greater than or equal to the distance (D4) between the diffusion portion (240) and the reflective side surface (S2) of the intermediate lens of the intermediate lens (230).

The distance (D5) from the diffusion part (240) to the light source side (S3) of the first rear lens (251) may be 1 mm to 5 mm. If the distance (D5) from the diffusion part (240) to the light source side (S3) of the first rear lens (251) is less than 1 mm, there is a limitation that assembly is difficult. If the distance (D5) from the diffusion part (240) to the light source side (S3) of the first rear lens (251) is greater than 5 mm, there is a limitation that miniaturization is difficult.

In addition, the separation distance (D5) between the diffusion unit (240) and the first rear lens (251) may be greater than at least one of the separation distance (D3) between the intermediate lens (230) and the diffusion unit (240), the separation distance (D7) between the first rear lens (251) and the second rear lens (252), and the separation distance (D9) between the second rear lens (252) and the reflector (260). As a result, it is possible to provide efficiency improvement through focusing of the light bundle in the diffusion unit.

The thickness (D6) of the first rear lens (251) may be greater than the thickness (D8) of the second rear lens (252). The thickness (D6) of the first rear lens (251) and the thickness (D8) of the second rear lens (252) may be greater than or less than the thickness (D2) of the intermediate lens (230). In an embodiment, the thickness (D6) of the first rear lens (251) and the thickness (D8) of the second rear lens (252) may be less than the thickness (D2) of the intermediate lens (230).

The distance (D10) from the reflector (260) to the light modulator (280) may be greater than the separation distance (D5) between the diffusion unit (240) and the rear lens group (250). Furthermore, the distance (D10) from the reflector (260) to the light modulator (280) may be greater than the thickness (D2) of the intermediate lens (230), the thickness (D6) of the first rear lens (251), or the thickness (D8) of the second rear lens (252).

In addition, the distance (D6+D7+D8+D9) from the light source side surface (S3) of the first rear-end lens to the reflection part (260) may be 5 mm to 12 mm. If the distance (D6+D7+D8+D9) from the light source side surface (S3) of the first rear-end lens to the reflection part (260) is smaller than 5 mm, there is a limitation that assembly is difficult. In addition, if the distance (D6+D7+D8+D9) from the light source side surface (S3) of the first rear-end lens to the reflection part (260) is 12 mm or more, there is a limitation that miniaturization is difficult. Preferably, for miniaturization, the distance (D6+D7+D8+D9) from the light source side surface (S3) of the first rear-end lens to the reflection part (260) may be 5 mm or more and 10 mm or less.

Furthermore, the distance (D5+D6+D7+D8+D9) from the diffusion portion (240) to the reflection portion (260) may be 11.7 mm to 12.3 mm. For example, if the distance (D5+D6+D7+D8+D9) from the diffusion portion (240) to the reflection portion (260) is smaller than 11.7 mm, there is a problem that focusing design and lens shape design are difficult. In addition, if the distance (D5+D6+D7+D8+D9) from the diffusion portion (240) to the reflection portion (260) is larger than 12.3 mm, there is a problem that miniaturization is difficult.

Additionally, the light source side surface (S1) of the intermediate lens may be convex or concave toward the light source (220). In an embodiment, the light source side surface (S1) of the intermediate lens may be concave toward the light source (220).

In addition, the reflection side (S2) of the intermediate lens may be convex toward the light modulator (280) or the reflection part (260). In other words, the reflection side (S2) of the intermediate lens may be concave toward the light source part (220). By this configuration, the three colors of red (R), green (G), and blue (B) light may be effectively provided to the reflection part (260) in a state of being mixed into white light.

In particular, the absolute value of the size of the radius of curvature of the light source side surface (S1) of the intermediate lens may be greater than the absolute value of the size of the radius of curvature of the reflection side surface (S2) of the intermediate lens. Accordingly, white light may be provided to the reflection side (260) with improved efficiency.

In addition, the light source side surface (S3) of the first rear lens may be convex toward the light source (220). And the reflection side surface (S4) of the first rear lens may be convex toward the light modulator or reflection. With this configuration, the reflection side (260) can be miniaturized, and distance adjustment can be easily performed in response to lighting performance.

The light source side surface (S5) of the second rear lens may be convex toward the reflector. In addition, the reflection side surface of the second rear lens may be convex toward the reflection.

And the optical axis (OX) of the light emitted from the light source (220) may form an angle (θa) of 42 to 48 degrees with the reflection surface of the reflection surface (260). For example, it may correspond to the reflection angle of the light in the reflection surface (260). By this configuration, miniaturization may be more easily achieved. And the angle formed by the optical axis (OX) with the reflection surface of the reflection surface (260) may be adjusted by the refractive index of the prism (270). The optical axis (OX) may be parallel to the first direction.

In addition, the size of the diffusion part (240) may be smaller than the maximum effective diameter of at least one of the intermediate lens (230) and the first rear lens (251). When the diffusion part (240) is a micro lens array, the entire active area (AA) may correspond to the size of the diffusion part (240). With this configuration, mixing of the light bundle by the diffusion part (240) at the stop may be easily performed, and the efficiency of the white light emitted from the diffusion part (240) may be increased.

In addition, the effective diameter of the first rear lens (251) may be larger than the effective diameter of the reflector (260). Accordingly, a miniaturized optical system or projector device can be provided.

Furthermore, the refractive index of the intermediate lens (230) may be lower than the refractive indices of the first rear lens (251) and the second rear lens (252).

Figure 9 is an optical system for an illumination system in a project device according to the second embodiment of the present invention.

In the projector device according to the second embodiment, the optical system (10B) includes a light source unit (220) from which light is emitted, an intermediate lens (230), a diffusion unit (240), a rear lens group (250), a reflection unit (260), an additional lens (263), and a prism (270) as described above, and an optical modulator (280) positioned at the rear end of the prism (270) and onto which light is incident can correspond to an image in the optical system. In the present projector device, the position of the stop is positioned between the light source unit (220) and the optical modulator (280), and in particular, the diffusion unit (240) can be arranged at the position of the stop. Furthermore, the contents of the above-described projector device can be equally applied, except for the contents described below.

Furthermore, in a project device according to another embodiment, each component may be applied with the contents of Table 3 (component information) and Table 4 (aspherical data) below.

Element or surface Surface type Y Radius Thickness Index Abbe semi-aperture Light source Sphere infinity 4.980 - - 0.500 Intermediate lens (S1) Asphere -46.444 3.000 1.497 81.55 1.584 Intermediate lens (S2) Asphere -3.366 0.020 - - 2.050 Diffuser Sphere infinity (0.4)TBD - - 2.000 Air Asphere infinity 5.000 - - 2 1st rear lens (S3) Asphere 3.403 1.093 1.69678 55.46 2.114 1st rear lens (S4) Asphere -31.743 2.741 - - 2.030 Air Sphere infinity 0.207 - - 0.560 Second rear lens (S5) Asphere -1.544 0.959 1.6385 55.17 0.593 Second rear lens (S6) Asphere -1.390 1.700 - - 0.931 mirror Sphere infinity 0.020 - - 1.607 Air Sphere infinity 0.880 - - 1.594 Air Sphere infinity 4.999 - - 1.101 DMD (DMD) Sphere infinity 0.000 - - 1.992

Attribute name Intermediate lens (S1) Intermediate lens (S2) 1st rear lens (S3) 1st rear lens (S4) Second rear lens (S5) Second rear lens (S6) Y Radius -46.4441665 -3.36574302 3.156033619 116.6128589 -1.62065146 -1.45745607 Conic Constant (K) 9.916248105 -5.86655125 -0.32152471 2440.381269 0 0.029118354 4th Order Coefficient (A) -0.00489658 -0.01852371 -0.00135862 -0.00032918 -4.25E-02 -0.01058586 6th Order Coefficient (B) -0.00031294 0.003316493 -9.41E-05 -6.49E-05 -0.33969245 -1.20E-02 8th Order Coefficient (C) 0.000947377 -0.0010524 -1.53E-06 -1.11E-05 5.58E-01 3.55E-03 10th Order Coefficient (D) -0.00092766 0.000302912 7.34E-07 -5.30E-07 1.45E-01 7.92E-03 12th Order Coefficient (E) 0.000213995 -4.60E-05 -9.16E-08 1.25E-07 -2.39E+00 -1.73E-02 14th Order Coefficient (F) 4.54E-05 -1.70E-06 0.00E+00 0.00E+00 0 0 16th Order Coefficient (G) -4.09E-06 7.38E-07 0.00E+00 0.00E+00 0 0 18th Order Coefficient (H) -9.39E-06 1.78E-07 0.00E+00 0.00E+00 0 0 20th Order Coefficient (J) 1.66E-06 -3.43E-08 0.00E+00 0.00E+00 0 0

Here, the thickness of the left or light source side of the intermediate lens and the first rear lens means the thickness (refractive index, Abbe number, etc.) of the intermediate lens and the first rear lens (or the second rear lens). The thickness of the right or light modulator side of the intermediate lens and the first rear lens means the separation distance from the next component. In addition, 'Air' is an additional separation distance between two adjacent elements. Therefore, the separation distance between the first rear lens and the second rear lens may be 2.948 mm (2.741 + 0.207). Furthermore, the unit for thickness and length may be mm. In addition, the thickness of the diffusion part and the reflection part means the separation distance from the rear component. In the embodiment, the light source side (S1) of the intermediate lens may be convex toward the light source part (220). In addition, the absolute value of the size of the radius of curvature of the light source side (S1) of the intermediate lens may be greater than the absolute value of the size of the radius of curvature of the reflection side (S2) of the intermediate lens. Accordingly, white light may be provided to the reflection side (260) with improved efficiency.

The thickness (D2) of the intermediate lens (230) may be smaller than the separation distance (D7) between the first rear lens (251) and the second rear lens (252) and the separation distance (D9) between the second rear lens (252) and the reflector (260).

Fig. 10 is an optical system for an illumination system in a project device according to a third embodiment of the present invention.

In the projector device according to the third embodiment, the optical system (10C) includes a light source unit (220) from which light is emitted, an intermediate lens (230), a diffusion unit (240), a rear lens group (250), a reflection unit (260), an additional lens (263), and a prism (270) as described above, and an optical modulator (280) positioned at the rear end of the prism (270) and onto which light is incident can correspond to an image in the optical system. In the present projector device, the position of the stop is positioned between the light source unit (220) and the optical modulator (280), and in particular, the diffusion unit (240) can be arranged at the position of the stop. Furthermore, the contents of the above-described projector device can be equally applied, except for the contents described below.

Furthermore, in a project device according to another embodiment, each component may be applied with the contents of Table 5 (component information) and Table 6 (aspherical data) below.

Element or surface Surface type Y Radius Thickness Index Abbe semi-aperture Light source Sphere infinity 4.980 - - 0.500 Intermediate lens (S1) Asphere -46.444 3.000 1.497 81.55 1.584 Intermediate lens (S2) Asphere -3.366 0.020 - - 2.050 Diffuser Sphere infinity (0.4)TBD - - 2.000 Air Asphere infinity 5.000 - - 2 1st rear lens (S3) Asphere 3.403 1.093 1.69678 55.46 2.114 1st rear lens (S4) Asphere -31.743 2.741 - - 2.030 Air Sphere infinity 0.207 - - 0.560 Second rear lens (S5) Asphere -1.544 0.959 1.6385 55.17 0.593 Second rear lens (S6) Asphere -1.390 1.700 - - 0.931 mirror Sphere infinity 0.020 - - 1.607 Air Sphere infinity 0.880 - - 1.594 Air Sphere infinity 4.999 - - 1.101 DMD (DMD) Sphere infinity 0.000 - - 1.992

Attribute name Intermediate lens (S1) Intermediate lens (S2) 1st rear lens (S3) 1st rear lens (S4) Second rear lens (S5) Second rear lens (S6) Y Radius -46.4441665 -3.36574302 3.156033619 116.6128589 -1.62065146 -1.45745607 Conic Constant (K) 9.916248105 -5.86655125 -0.32152471 2440.381269 0 0.029118354 4th Order Coefficient (A) -0.00489658 -0.01852371 -0.00135862 -0.00032918 -4.25E-02 -0.01058586 6th Order Coefficient (B) -0.00031294 0.003316493 -9.41E-05 -6.49E-05 -0.33969245 -1.20E-02 8th Order Coefficient (C) 0.000947377 -0.0010524 -1.53E-06 -1.11E-05 5.58E-01 3.55E-03 10th Order Coefficient (D) -0.00092766 0.000302912 7.34E-07 -5.30E-07 1.45E-01 7.92E-03 12th Order Coefficient (E) 0.000213995 -4.60E-05 -9.16E-08 1.25E-07 -2.39E+00 -1.73E-02 14th Order Coefficient (F) 4.54E-05 -1.70E-06 0.00E+00 0.00E+00 0 0 16th Order Coefficient (G) -4.09E-06 7.38E-07 0.00E+00 0.00E+00 0 0 18th Order Coefficient (H) -9.39E-06 1.78E-07 0.00E+00 0.00E+00 0 0 20th Order Coefficient (J) 1.66E-06 -3.43E-08 0.00E+00 0.00E+00 0 0

Here, the thickness of the left or light source side of the intermediate lens and the first rear lens means the thickness (refractive index, Abbe number, etc.) of the intermediate lens and the first rear lens (or the second rear lens). The thickness of the right or light modulator side of the intermediate lens and the first rear lens means the separation distance from the next component. In addition, 'Air' is an additional separation distance between two adjacent elements. Therefore, the separation distance between the first rear lens and the second rear lens may be 2.948 mm (2.741 + 0.207). Furthermore, the unit for thickness and length may be mm. In addition, the thickness of the diffusion part and the reflection part means the separation distance from the rear component. In the embodiment, the light source side (S1) of the intermediate lens may be convex toward the light source part (220). In addition, the absolute value of the size of the radius of curvature of the light source side surface (S1) of the intermediate lens may be greater than the absolute value of the size of the radius of curvature of the reflection side surface (S2) of the intermediate lens. For example, the light source side surface (S1) of the intermediate lens may be a flat surface. Accordingly, the light source side surface (S1) of the intermediate lens may have an infinite radius of curvature. Accordingly, white light may be provided to the reflection side (260) with improved efficiency.

In addition, as the absolute value of the size of the curvature radius of the light source side (S1) of the intermediate lens increases, the absolute value of the size of the curvature radius of the reflective side (S2) of the intermediate lens may decrease.

Additionally, the thickness (D2) of the intermediate lens (230) may be smaller than the separation distance (D7) between the first rear lens (251) and the second rear lens (252) and the separation distance (D9) between the second rear lens (252) and the reflector (260).

And the thickness (D2) of the intermediate lens (230) may be smaller than the thickness (D6) of the first rear lens or the thickness (D8) of the second rear lens.

The features, structures, effects, etc. described in the embodiments above are included in at least one embodiment, and are not necessarily limited to one embodiment. Furthermore, the features, structures, effects, etc. exemplified in each embodiment can be combined or modified and implemented in other embodiments by a person having ordinary knowledge in the field to which the embodiments belong. Therefore, the contents related to such combinations and modifications should be interpreted as being included in the scope of the embodiments.

Although the above description focuses on examples, these are merely examples and do not limit the examples, and those with ordinary knowledge in the field to which the examples belong will recognize that various modifications and applications not exemplified above are possible without departing from the essential characteristics of the present examples. For example, each component specifically shown in the examples can be modified and implemented. In addition, the differences related to such modifications and applications should be interpreted as being included in the scope of the embodiments set forth in the appended claims.

Claims (15)

light source;
A light modulator that modulates light emitted from the above light source;
A diffusion unit disposed between the above optical modulator and the light source unit;
An intermediate lens disposed between the diffusion unit and the light source unit;
A first rear lens disposed between the diffusion unit and the optical modulator; and
A second rear lens is disposed between the first rear lens and the optical modulator;
A project device in which the effective diameter of the first rear lens is larger than the effective diameter of the second rear lens. In the first paragraph,
A projector device in which the effective diameter of the reflection side of the first rear lens is larger than the effective diameter of the light source side of the second rear lens. In the first paragraph,
A projector device in which the effective diameter of the reflection side of the first rear lens and the light source side of the second rear lens have a ratio of 1:3.4 to 1:4.1. In the first paragraph,
A reflector disposed between the second rear lens and the optical modulator;
A project device including a prism disposed between the optical modulator and the reflector. In paragraph 4,
A projector device in which the distance between the diffusion unit and the first rear lens is greater than at least one of the distance between the intermediate lens and the diffusion unit, the distance between the first rear lens and the second rear lens, and the distance between the second rear lens and the reflector. In the first paragraph,
A project device wherein the distance between the diffusion portion and the first rear lens is 1 mm to 5 mm. In the first paragraph,
A project device in which the size of the above diffusion portion is smaller than the maximum effective diameter of at least one of the intermediate lens and the first rear lens. In paragraph 4,
A project device in which the effective diameter of the first rear lens is larger than the effective diameter of the reflector. In the first paragraph,
A projector device in which the refractive index of the intermediate lens is lower than the refractive indices of the first rear lens and the second rear lens. In the first paragraph,
The above diffusion unit is a project device positioned at or adjacent to the stop position. In the first paragraph,
The light source side of the above intermediate lens is a convex or concave projector device toward the light source. In paragraph 4,
A project device in which the reflective surface of the above intermediate lens is convex toward the reflective surface. In paragraph 4,
A projector device in which the size of the radius of curvature of the light source side of the above intermediate lens is larger than the size of the radius of curvature of the reflection side of the above intermediate lens. In paragraph 4,
A projector device in which the light source side of the first rear lens is convex toward the light source. In paragraph 4,
A projector device in which the reflective surface of the first rear lens is convex toward the reflective surface.

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