A method of controlling a display device is a method for controlling a display device including a light modulation sheet switchable between a transparent state and an opaque state. When an operation to turn on the display device is obtained, a PWM waveform for generating an alternating voltage based on a direct voltage is output, the alternating voltage having a duty cycle of 50% at a phase of 0 degrees or 180 degrees, the alternating voltage is generated from the direct voltage, based on the PWM waveform output, and the alternating voltage generated is output to the light modulation sheet.

A liquid crystal display (LCD) and a driving method thereof are disclosed. The LCD includes: an LCD panel, a grayscale voltage output portion and a grayscale voltage adjusting portion. The LCD panel includes a deformation area formed by bonding of a driver integrated circuit, and the deformation area includes a first subpixel. The grayscale voltage output portion is configured to output a first grayscale voltage to the first subpixel. The grayscale voltage adjusting portion is configured to adjust the first grayscale voltage into a second grayscale voltage, so that a brightness of the first subpixel at the second grayscale voltage is less than a brightness of the first subpixel at the first grayscale voltage.

The present disclosure provides an image capturing apparatus, including: a light source module having a first surface and a second surface opposite to each other along a thickness direction; an LCD module having a first surface and a second surface opposite to each other along the thickness direction; a light-transmitting cover plate having a first surface and a second surface opposite to each other along the thickness direction, wherein the first surface of the light-transmitting cover plate is configured to contact with an object to be captured, and the second surface of the light-transmitting cover plate is configured to face the first surface of the LCD module; and a sensor module configured to collect an incident light reflected by the light-transmitting cover plate. The present disclosure can realize image capturing based on the principle of total reflection under an LCD screen, optimize imaging effect, and improve imaging clarity.

According to one embodiment, an electronic apparatus includes a first liquid crystal panel, a second liquid crystal panel, a camera overlapping the first liquid crystal panel and the second liquid crystal panel and receiving light via the first liquid crystal panel and the second liquid crystal panel. The first liquid crystal panel includes a first liquid crystal layer, a first pixel electrode not overlapping the camera, and a second pixel electrode overlapping the camera. The second liquid crystal panel includes first transparent electrodes overlapping the camera, a second transparent electrode overlapping the first transparent electrodes, and a second liquid crystal layer disposed between the first transparent electrodes and the second transparent electrode.

Aspects of this disclosure concern controllers and control methods for applying a drive voltage to bus bars of optically switchable devices such as electrochromic devices. Such devices are often provided on windows such as architectural glass. In certain embodiments, the applied drive voltage is controlled in a manner that efficiently drives an optical transition over the entire surface of the electrochromic device. The drive voltage is controlled to account for differences in effective voltage experienced in regions between the bus bars and regions proximate the bus bars. Regions near the bus bars experience the highest effective voltage.

Provided are a polarization imaging apparatus, a polarization imaging method, a controller and a computer readable storage medium. The polarization imaging apparatus includes an optical rotation device, a lens device, an image sensor, an image processor, and a controller which are sequentially arranged along a ray direction of incident light. The controller is configured to control the optical rotation device to be in a first optical rotation state or a second optical rotation state, control the lens device to be in an in-focus state or an out-of-focus state, and control the image sensor to collect light passing through the optical rotation device and the lens device to obtain multiple images. The image processor is configured to obtain polarized image information according to the multiple images.

The present disclosure relates to a circuit of controlling a common voltage of a liquid crystal panel. According to an embodiment of the present disclosure, a voltage control circuit is configured to provide a common voltage to a common electrode of a liquid crystal panel. The liquid crystal panel includes M rows and N columns of pixel units. Each pixel unit is coupled to the common electrode. The voltage control circuit includes an operational amplifier arranged in a negative feedback configuration. The operational amplifier includes: an input stage, a gain stage and an output stage. The output stage includes a second NMOS transistor and a second PMOS transistor. A gate of the second NMOS transistor receives a first control signal, a drain of the second NMOS transistor is coupled to a gate of a first PMOS transistor, and a source of the second NMOS transistor is coupled to a second reference voltage. A gate of the second PMOS transistor receives a second control signal, a drain of the second PMOS transistor is coupled to a gate of a first NMOS transistor, and a source of the second PMOS transistor is coupled to a third reference voltage.

An electrically dynamic window structure may include first and second panes of transparent material and an electrically controllable optically active material positioned between the two panes. A driver can be electrically connected to electrode layers carried by the two panes. The driver may be configured to alternate between a drive phase in which a drive signal is applied to the electrode layers and an idle phase in which the drive signal is not applied to the electrode layers. The electrically controllable optically active material can maintain its transition state during the idle phase. As a result, the power consumption of the structure may be reduced as compared to if the driver continuously delivers the drive signal.

Systems and methods for IR readable transmissive and reflective displays are disclosed that do not suffer from a mirror-like appearance or undesirable dimming of the display due to sequential stacks of polarizers. The disclosed systems and methods use available IR LEDs in addition to, or in place of, visible light LEDs. An illuminator or integrator, which is a lightguide, is designed to maintain the polarization state of the light. The display can use a regular visible light, front polarizer and hence does not suffer from brightness reduction caused by an IR capable polarizer.

An object includes an electro-optic display device provided with an optically active element, the optical properties thereof can be modified by applying an electric voltage or current between at least one electrode and one corresponding auxiliary electrode, between which the optically active element is disposed. The object further includes a middle part which delimits an opening closed by a crystal including a bottom surface beneath which the electro-optic display device is arranged. The crystal is provided with an opaque frame which is made remotely from the edges of the opening and which covers the contour of the electro-optic display device so as to conceal electrical connection elements. The electro-optic display device defines an active display area which is confined by the opaque frame, such that, when the electro-optic display device is activated and displaying information, a transparent area remains between the opaque frame and the edges of the opening.