A method for displaying in a transportation vehicle braking operations of transportation vehicles driving ahead wherein the transportation vehicles driving ahead are detected; data are collected on the acceleration of the transportation vehicles driving ahead; and, from the data on the acceleration, first transportation vehicles driving ahead with a first acceleration are determined, the first acceleration being a negative acceleration, the magnitude of which is greater than or equal to a specified threshold value. On a display area, first graphical objects are generated, each first transportation vehicle driving ahead being assigned a first graphical object which indicates that the first transportation vehicle driving ahead assigned to the first graphical object has the first acceleration. Also disclosed is a device for displaying accelerations of transportation vehicles driving ahead in a transportation vehicle.

A method for pairing a key fob with a control unit is provided. The key fob executes an ID authenticated key agreement protocol with a pairing device based on a key fob identification to authenticate one another and to generate a first encryption key. The pairing device encrypts a control unit identification using the first encryption key. The key fob receives the encrypted control unit identification transmitted from the pairing device. The key fob then executes an ID authenticated key agreement protocol with the control unit based on the control unit identification to authenticate one another and to generate a second encryption key. The key fob then receives an operational key transmitted from the control unit that is encrypted with the second encryption key.

The present disclosure generally relates to an information system for a working machine, specifically adapted for projecting an image onto an area externally of the working machine based on construction data relating to a surrounding of the working machine. The present disclosure also relates to a corresponding method and computer program for such a working machine.

A display device, a display system, and a mobile object. The display device includes an image forming unit through which image light exits, an imaging optical system having a reflection plane and configured to form an image by reflecting the image light on the reflection plane, and a housing accommodating the image forming unit and the imaging optical system. The housing has a transmissive area through which the image light reflected by the imaging optical system passes through, and an inclination of the reflection plane is changed to reduce a project area of the reflection plane. The project area is projected to outside of the housing through the transmissive area. The display system includes the display device, and a reflector configured to reflect the image light reflected by the imaging optical system. The mobile object includes the display system, and the reflector is a front windshield.

Information related to a vehicle can be displayed by projecting an image based on the information on a road surface or the like. An image projection apparatus that projects an image includes: an acquisition unit that acquires information to be displayed; and an image projection unit that projects the image based on the information to be displayed acquired by the acquisition unit.

The present invention provides a member for displaying a projected image and a projected image display system in which a clear image can be displayed with high reflectivity and high transmittance without a double image, the member for displaying a projected image including a reflection layer, and a /2 phase difference layer, in which the reflection layer includes a cholesteric liquid crystal layer having selective reflection in a visible light range, and the projected image display system including the member for displaying a projected image, in which the /2 phase difference layer is disposed on an incidence ray side with respect to the reflection layer, and the incidence ray is p-polarized light which vibrates in a direction parallel to an incidence surface.

A head-up display device, a head-up display method and a vehicle are provided. The head-up display device includes: a light source configured to generate a to-be-modulated light beam; a phase spatial light modulator configured to modulate a phase of the to-be-modulated light beam and emit at least two phase-modulated light beams; a reproduction component configured to perform image reproduction on the at least two phase-modulated light beams, so as to generate at least two reproduced images; at least two diffusers configured to receive and diffuse the at least two reproduced images generated by the reproduction component respectively; and a reflector assembly configured to guide the at least two light beams diffused by the at least two diffusers to a projection region, so as to form at least two projection images at different spatial positions.

A drive assist device includes a fatigue degree estimator and a display controller. The fatigue degree estimator estimates a fatigue degree of a driver of a vehicle. The display controller changes a display range of an optical flow to be presented to the driver, on a basis of the fatigue degree.

A display system and an in-vehicle system include a display device provided at a vehicle and configured to display a person image indicating a person at a position visible from the outside of the vehicle; and a controller configured to acquire surrounding status information indicating a surrounding status of the vehicle and control the display device based on the acquired surrounding status information, thereby the executing external display processing of displaying the person image. As a result, the display system and the in-vehicle system provide an advantageous effect that easily-understandable displaying can be performed.

(Object) It is possible to make a display area less perceivable to a user. (Means of Achieving the Object) An HUD device (i.e., the HUD device of the practical example 1) is a display device for displaying in a display area a virtual image of at least a part of a sign that moves. The display device includes a displaying system configured to form an image of the sign that moves with light in a region including an image region (i.e., a predetermined region), and to irradiate a front windshield (i.e., transparent/reflective member) with light that forms at least a part of the image, the part of which is in the image region, such that the virtual image of the at least a part of the image is displayed in the display area. The displaying system includes an FPGA 600 (i.e., control device) that is capable of controlling a characteristic of the image in accordance with position of the virtual image relative to the display area. The image sign to be displayed is an indicator mark indicating the presence and location of an object not being viewable through the front display windshield.