Provided is a head-up display system and a transportation machine including the head-up display system, the head-up display system including a windshield glass having a selective reflection layer and a projector including laser light sources of three colors of blue light, green light, and red light for forming a projection image on the windshield glass,

in which the selective reflection layer includes the following selective reflection central wavelengths ?.sub.B, ?.sub.G, and ?.sub.R at a light incidence angle of 60?,

400nm??.sub.B<500nm

500nm??.sub.G<600nm

600nm??.sub.R<700nm

all of X.sub.B/X.sub.G, X.sub.B/X.sub.R, and X.sub.G/X.sub.R are in a range of 0.80 to 1.20.

In the above, X.sub.B=R.sub.B?L.sub.B, X.sub.G=R.sub.G?L.sub.G, and X.sub.R=R.sub.R?L.sub.R.

R.sub.B, R.sub.G, and R.sub.R indicate a natural light reflectivity at ?.sub.B, ?.sub.G, and ?.sub.R, and L.sub.B, L.sub.G, and L.sub.R indicate the brightness of blue, green, and red laser beam emitted from the projector.

A apparatus includes a picture generation unit, an enlarging and display unit, and a touch control unit. The picture generation unit is configured to generate a source image. The enlarging and display unit is configured to enlarge the source image generated by the picture generation unit. In addition, the picture generation unit is further configured to generate and project a touchscreen. The touch control unit is configured to detect and respond to a touch operation performed by a user on the touchscreen.

A monitoring system for an automobile includes at least one illumination source that is configured to project a first illumination type towards a driver location. At least one imaging device is configured to capture the first illumination type at the driver location. A visor assembly includes a stowed position and an articulated position. The visor assembly in the articulated position obscures at least part of the first illumination type from the driver location. An electro-optic device is located in the visor assembly and is configured to switch between a transmissive state and a darkened state. The first illumination type passes through the electro-optic device in the transmissive state and the darkened state, and a second illumination type passes through the electro-optic device in the transmissive state but is blocked in the darkened state.

The invention relates to a steering module (8) for a motor vehicle (1), the steering module (8) comprising an optical signaling unit (14), which optically indicates an operating state of the motor vehicle (1), wherein the optical signaling unit (14) comprises at least one light source (15) and a light guide (16), by which the light emitted by the light source (15) with a main radiation direction (20) is capable of being deflected in an exit direction which is different from the main radiation direction (20) and the light exits in this exit direction (19) from an emission surface (18) from the light guide (16), wherein the light guide (16) is shaped in such a way that light rays of the coupled-in light are reflected therein at least twice so that the exit direction (19) is opposite to the main radiation direction (20).

Discussed is a liquid crystal display device that can include a backlight unit, a switching unit disposed on an upper side of the backlight unit and including a first twisted nematic (TN) switching cell configured to change light transmittance for a first direction between a first mode and a second mode and a second twisted nematic (TN) switching cell disposed on an upper side of the first TN switching cell, and an image display layer disposed on an upper side of the switching unit. According to embodiments of the present disclosure, by providing a liquid crystal display device having a triple cell structure including two TN switching cells and one image cell, a light output for a first direction can be effectively blocked in a second mode in which partial viewing angle blocking is needed.

A hybrid projector system for a head up display within a vehicle includes a digital light projector adapted to project a first graphical image onto an inner surface of a windshield of the vehicle, and a vector graphics projector adapted to project a second graphical image onto the inner surface of the windshield of the vehicle.

In some embodiments, a display system comprises a set of reflective or semi-reflective elements. A display emits light such that one portion of the light travels a first path through the display system, and another portion travels a second path, which includes a reflection from a windshield. The two portions form virtual images that are simultaneously viewable in a headbox. In some embodiments, the source of light that forms the image is an ambient source, and the display system is at least in part a sunlight-driven display system. In some embodiments, virtual images have a monocular depth that is far from a viewer. In some embodiments, the virtual images are closer to a viewer, and a gesture camera captures information about gestures made by a viewer, said gestures modifying the virtual images or some property or dynamics of the vehicle.

A set of training images are input into a neural network that outputs a pixel-wise phase matrix identifying pixels in the training images. Based on the pixel-wise phase matrix, a spatial light modulator (SLM) is actuated to output, onto a vehicle windshield, an augmented reality (AR) image including a plurality of sub-images each output in one of a plurality of focal planes. Each training image corresponds to one respective sub-image. A feedback image of the AR image is obtained via an image sensor. An offset is determined based on comparing the training images to the feedback image. Parameters of a loss function are updated based on the offset, and the updated parameters are provided to the neural network to obtain an updated offset.

A display apparatus providing a virtual image to user is provided. The display apparatus may include a hologram optical element on a path of light emitted from a display panel. The display panel may emit light having different peak wavelength ranges. The reflection angle or the refraction angle recorded in the hologram optical element is different according to the peak wavelength range. Thus, the display apparatus may provide a plurality of virtual images having different focal lengths to the user without physical movement or mechanical operation of the display panel.

A control unit, in a disclosed embodiment, includes a transceiver, memory, and a processor. The processor is coupled to the transceiver and memory and executes instructions from the memory to cause the control unit to receive a first transmission containing a certificate, verify the authenticity of the certificate, and, after verifying authenticity of the certificate, execute a public key agreement protocol to generate a first common secret encryption key, receive a second transmission containing an encrypted first public key that is encrypted by the first common secret encryption key, decrypt the encrypted first public key using the first common secret encryption key to determine the first public key, execute a public key agreement protocol to generate a second common secret encryption key, generate an operational key, encrypt the operational key using the second common secret encryption key, and transmit the encrypted operational key.