An object of the present invention is to provide a projection apparatus capable of appropriately performing control relating to rotation of the projection lens. A projection apparatus according to a first aspect of the present invention includes a housing; a power supply; and a projection lens attached to the housing, the projection lens having a holder and a locking mechanism unit that brings rotation of the holder into a locked state or an unlocked state. Rotation of the holder is in the locked state when the power supply has been turned on. With the first aspect, since the power is turned on in a state in which the projection lens is not rotatable, the locked state can be safely unlocked by user's intention and the holder can be rotated.

A display device includes: a light projection device configured to project light including an image; an optical mechanism provided on a path of the light and configured to be capable of adjusting a distance from a predetermined position to a position at which the light is formed as a virtual image; and a control device configured to control the light projection device. The control device corrects a position of an image formed based on an external environment of a vehicle when a distance between a gazing point of an occupant of the vehicle and a vanishing point of a travel lane of the vehicle is less than a predetermined distance, and suppresses the correction of the position of the image when the distance between the gazing point and the vanishing point is equal to or greater than the predetermined distance.

The present disclosure relates to a projection device, and more particularly, to a projection device including: a projector module configured to provide an image to a screen; and a lens module between a user's eyes and the screen, wherein the project module includes: a display module configured to provide a certain image; and a backlight module configured to provide light to the display module such that the image provided by the display module is projected on the screen, wherein the display module is between the backlight module and the screen, the display module is configured to induce a convergence reaction on the user's eyes such that the image projected on the screen has a convergence distance, and the lens module is configured to induce a focus reaction on the user's eyes and change a focal length of the image reproduced by the display module within a certain range.

An illumination system comprises an exciting light source, a phosphor wheel, a first lens, a first reflector, and a light uniforming element. The exciting light source emits an excitation beam. In a first time sequence, the phosphor wheel reflects the excitation beam to the first reflector, the first reflector reflects the excitation beam to the first lens and the excitation beam passes through the first lens and transmits to the light uniforming element. In a second time sequence, the phosphor wheel converts the excitation beam to a conversion beam, the conversion beam from the phosphor wheel passes through the first lens and transmits to the first reflector, the first reflector reflects the conversion beam to the first lens, the conversion beam passes through the first lens and transmits to the light uniforming element, the excitation beam and the conversion beam, sequentially and respectively transmits to the light uniforming element.

An illumination system provides an illumination beam and includes a red light source, a green light source, a blue light source, a first supplementary light source, a first X-shaped light-splitting assembly, a first light-splitting element, and a light-uniforming element. The red light source provides a red beam. The green light source provides a green beam. The blue light source provides a blue beam. The first supplementary light source provides a first supplementary beam. The first X-shaped light-splitting assembly guides the first supplementary beam and the blue beam to the first light-splitting element. The first light-splitting element guides the red beam, the green beam, the blue beam, and the first supplementary beam to the light-uniforming element. The first supplementary beam is a red supplementary beam or a blue supplementary beam, and the illumination system includes at least five light-emitting elements. A projection apparatus including the above illumination system is also provided.

The present disclosure provides a projection device and manufacturing method, comprising the steps of fixing the positions of a red light source, green light source and blue light source so that the light sources are immovable; providing a mirror which is configured to oscillate such that it can scan light it receives across a display screen; positioning an optical component, which is configured to deflect light, such that it can receive red, green and blue light beams outputted from the red, green and blue light sources respectively; adjusting the optical component such that the optical component compensates for variation between the light sources, in the direction in which the red, green and blue light beams are output from the red, green and blue light sources, so that each of the red, green and blue light beams are directed to the same point on the display screen.

A light source apparatus includes an excitation light emitter configured to irradiate excitation light, a phosphor that receives the excitation light and converts the excitation light into wavelength band light different from the excitation light, and a color wheel device. A first region of regions divided in a radial direction of the color wheel device includes a first transparent part that transmits the wavelength band light. A second region, which is different from the first region of the regions divided in the radial direction of the color wheel device, includes a reflector that reflects the excitation light and changes a light path and a second transparent part that transmits the excitation light. The phosphor is arranged on a light path of the excitation light reflected by the reflector or on a light path of the excitation light transmitted by the second transparent part.

First to third lens groups that are formed of anamorphic lenses having positive power and anamorphic lenses having negative power combined with one another and allow the distances between the anamorphic lenses to be changed cooperate with one another to allow field curvature to be changed both in the meridian direction and the sagittal direction.

A projection apparatus is provided, including a lens module, a movement element, a sensing element, and a lens control element. When the lens module moves to the origin position, the lens control element controls an image beam to focus on a first position on a reference plane in one of the tele mode and the wide mode, the lens control element controls the image beam to focus on a second position on the reference plane in the other mode, and the lens control element determines whether there is an offset between the first position and the second position. When the offset exists, the lens control element adjusts a movement parameter value of the movement element based on the offset value between the first position and the second position, so that the image beam is focused on the same position on the reference plane in the tele mode and wide mode.

A projection optical device includes an incident side optical path on which image light is made incident from a image generation device, a bending member configured to bend the image light having passed through the incident side optical path, an emission side optical path on which the image light bent by the bending member is made incident, the emission side optical path being disposed side by side with the light source device, and a reflection element provided on the emission side optical path and configured to reflect the image light made incident thereon and project the image light to the outside of the exterior housing. The absolute value of f2/f1 satisfies the following expression when a focal length of the projection optical device is represented as f1 and a focal length of the reflection element is represented as f2.