Embodiments of the present disclosure relate to a pixel circuit with a burn-in compensation. The pixel circuit includes a light-emitting diode (LED), a first driving transistor between a voltage source and the LED, a switching transistor coupled to a gate electrode of the first driving transistor, and a second driving transistor connected between the voltage source and the LED. The first driving transistor provides first current from the voltage source to the LED according to a gate voltage of the first driving transistor. The switching transistor is turned on after receiving an enable signal. The second driving transistor provides second current from the voltage source to the LED according to a version of the gate voltage of the first driving transistor received at a gate of the second driving transistor via the switching transistor.

To improve brightness of image information visually recognized by a user while using plastic for a light guide plate. An image display element includes: a substrate made of resin; an incident diffraction grating that diffracts incident light; and an exit diffraction grating that emits the light, the incident diffraction grating being formed on a first surface of the substrate, the exit diffraction grating being formed on a second surface on a side opposite to the first surface of the substrate, and the exit diffraction grating being formed on one surface.

Provide are an optical element that can improve a utilization efficiency of light while increasing an optical path length, an image display unit, and a head-mounted display. The optical element includes, in the following order: a first absorptive linearly polarizing plate; a first reflective linearly polarizing plate; a first retardation plate; a partially reflecting mirror that allows transmission of a part of incident light and reflects a part of the incident light; a second retardation plate; and a second reflective linearly polarizing plate, in which a turning direction of circularly polarized light that is reflected from the first reflective linearly polarizing plate in a case where light transmits through the first retardation plate and is incident into the first reflective linearly polarizing plate is opposite to a turning direction of circularly polarized light that is reflected from the second reflective linearly polarizing plate in a case where light transmits through the second retardation plate and is incident into the second reflective linearly polarizing plate.

A head up display including an image-light source, at least one reflector and a light modulation device is provided. The image-light source is configured to provide an image light. The at least one reflector is configured to transmit the image light to leave the head up display. On the transmission path of the image light, the light modulation device is disposed in the head up display. An ambient light enters the image-light source after passing through the light modulation device, and a light energy of the ambient light entering the image-light source is less than or equal to 25% of a light energy of the ambient light entering the head up display.

An HMD apparatus includes an image source, a light guiding element, a first modulating element, and a second modulating element. The image source provides an image beam. The light guiding element is arranged on a transmission path of the image beam to transmit the image beam. The light guiding element has a first surface and a second surface opposite to each other. The image beam undergoes total internal reflection at the first surface and is emitted from the second surface. The first modulating element is arranged on one side of the first surface of the light guiding element and configured to adjust a transmittance of an ambient beam. The light guiding element is arranged between the first and second modulating elements, and the second modulating element is configured to adjust a focus position of the image beam. The HMD apparatus may improve wearing comfort and achieve good display effects.

A headset for augmented reality applications is provided. The headset includes at least one eyepiece configured to provide a see-through image to a user via a transparent optical component, and to provide an artificial image through a display, and a dimming shutter configured to adjust a transparency level of the transparent optical component. The dimming shutter further includes an active liquid crystal layer configured to adjust a transparency level according to an electrical power provided between two electrodes, and a photoactive layer configured to adjust the transparency level upon absorption of an ultraviolet radiation for a selected period of time. A default orientation of a host material in the active liquid crystal layer may be in a dark state or in a clear state, when no electrical power is provided. A method and a memory storing instructions to execute the method for use of the above device are also provided.

A projection arrangement for a head-up display (HUD), includes a composite pane, which includes an outer pane and an inner pane joined to one another via a thermoplastic intermediate layer and has an HUD region; an electrically conductive coating on the surface of the outer pane or the inner pane facing the intermediate layer or within the intermediate layer; and an HUD projector, which is directed at the HUD region; wherein the radiation of the projector is p-polarised, wherein the electrically conductive coating includes a first dielectric layer or layer sequence, a first electrically conductive layer, a second dielectric layer or layer sequence, a second electrically conductive layer, a third dielectric layer or layer sequence, a third electrically conductive layer, a fourth dielectric layer or layer sequence, a fourth electrically conductive layer, and a fifth dielectric layer or layer sequence.

A head up display system presents information to a human driver of a motor vehicle such that the presented information is superimposed on a windshield of the motor vehicle. An image capturing device captures an image of a scene in front of the vehicle that is representative of a background against which the information is presented to the driver. An electronic processor receives signals from the image capturing device indicative of the captured images of the scene in front of the vehicle. The processor determines, based on a color of the presented information and the signals from the image capturing device, whether the presented information is readable by the driver. If it is determined that the presented information is not readable by the driver, then a color of the presented information is changed so as to make the presented information more readable by the driver.

To improve brightness of an image to be perceived by a user and enhance visibility there is provided a light guide plate including an incident diffraction grating which diffracts incident imaging light, an exit diffraction grating through which the imaging light goes out, and an intermediate diffraction grating existing in optical paths from the incident diffraction grating to the exit diffraction grating. In this light guide plate, a periodic linear corrugated pattern is formed as the incident diffraction grating, and when an imaginary line is established that passes through an incident point of imaging light onto the incident diffraction grating and is parallel with a periodic direction of the corrugated pattern, the intermediate diffraction grating has a first region on one side of the imaginary line and a second region on another side of the imaginary line.

A system is provided. The system includes a waveguide configured to guide an image light to propagate inside the waveguide. The system also includes a plurality of diffractive components coupled to the waveguide and switchable between operating in a diffraction state to direct the image light from the waveguide to an eye-box of the system, and operating in a non-diffraction state to transmit a light from a real-world environment to the eye-box. The system further includes a controller coupled with the plurality of diffractive components and configured to switch each of the plurality of diffractive components between operating in the diffraction state during a virtual-world subframe of a display frame and operating in the non-diffraction state during a real-world subframe of the display frame.