A display driver includes a memory, a receiver, an image output unit, a controller, and an image mode selection unit. The memory stores a video signal. The receiver receives the video signal and a first control signal from a host processor, where the first control signal corresponds to the video signal. The image output unit processes the video signal stored in the memory and outputs the processed video signal to a display unit. The controller controls the image output unit based on an image mode to display an image corresponding to the video signal. The image mode selection unit detects the first control signal and a second control signal from the controller, and changes the image mode based on the first control signal and second control signal.

Methods and apparatus are provided for displaying shadows of circular light sources. A computing device can determine a light source and an occluding polygon that is between the light source and a receiver surface, where the occluding polygon includes vertices connected by edges. The computing device can determine a shadow of the occluding polygon on the receiver surface by at least: determining, for a particular vertex, a projection vertex on the receiver surface by projecting a ray from the center point through the particular vertex; determining an outline polygon based on the projection vertex; determining a projection circle around the projection vertex; determining a penumbra of the shadow based on exterior tangents outside of the outline polygon; and determining an umbra of the shadow based on interior tangents inside the outline polygon. The computing device can display at least part of the shadow.

The present invention discloses a low-power driving control method of light sensing touch panel, which comprises the following steps: measuring the ambient light field intensity of the light sensing touch panel, and outputting a light field signal; outputting an amplification signal adapting to a touch signal according to the intensity of the light field signal; amplifying the touch signal according to the amplification signal, and driving the light sensing touch panel. The present invention further discloses a light sensing touch panel. The light sensing touch panel and the low-power driving control method thereof according to the present invention can reduce the power consumption of the touch panel without affecting the touch sensitivity.

The present invention discloses a low-power driving control method of light sensing touch panel, which comprises the following steps: measuring the ambient light field intensity of the light sensing touch panel, and outputting a light field signal; outputting an amplification signal adapting to a touch signal according to the intensity of the light field signal; amplifying the touch signal according to the amplification signal, and driving the light sensing touch panel. The present invention further discloses a light sensing touch panel. The light sensing touch panel and the low-power driving control method thereof according to the present invention can reduce the power consumption of the touch panel without affecting the touch sensitivity.

An array substrate has a display area and a bonding region. The display area includes a distal region, a proximal region, and a middle region therebetween. The array substrate includes a base, a common electrode located in the display area, a connecting lead disposed outside the distal region, a conductive frame at least partially surrounding the display area, and at least one first common signal line, at least one second common signal line and at least one third common signal line. The first common signal line, the second common signal line and the third common signal line are respectively coupled to portions of the common electrode located in the distal region, the proximal region and the middle region. The first common signal line is coupled to the connecting lead. The connecting lead and the portion of the common electrode located in the distal region are coupled to the conductive frame.

The effects of inter pixel capacitance in a pixilated array may be measured by first resetting all pixels in the array to a first voltage, where a first image is read out, followed by resetting only a subset of pixels in the array to a second voltage, where a second image is read out, where the difference in the first and second images provide information about the inter pixel capacitance. Other embodiments are described and claimed.

A head up display apparatus capable of reducing a time period during which a user cannot visually recognize a virtual image while preventing damage due to sunlight and a control method thereof are provided. According to the present invention, it is possible to contribute to Goal 3: Ensure healthy lives and promote well-being for all at all ages in the Sustainable Development Goals (SDGs). A video display 35 displays a video and emits video light of the displayed video. A mirror (video light projector) M1 projects the video light emitted from the video display 35 to a display region 5 so as to be reflected, thereby causing a user to visually recognize the projected video light as a virtual image. A shutter 68 is provided on an optical path 30 of the video light and switches to an optical path forming state in which the optical path of the video light is formed or an optical path non-forming state in which the optical path of the video light is not formed.

What is disclosed are structures and methods for testing and repairing emissive display systems. Systems are tested with use of temporary electrodes which allow operation of the system during testing and are removed afterward. Systems are repaired after identification of defective devices with use of redundant switching from defective devices to functional devices provided on repair contact pads.

A projector includes a light modulator, and a controller communicatively coupled to: an image source that provides frames to drive the light; and a light source arranged to illuminate the modulator according to colors. The controller, for a given image frame and given color: determines headroom of highest brightness pixels of the given frame, the headroom representing a difference between a peak brightness of a peak throughput of the modulator and a respective highest brightness associated with the highest brightness pixels; reduces a light source brightness to correspond to a peak light source brightness reduced by the headroom; controls highest brightness regions of the modulator to the peak throughput; and, based on reduced light source brightness, the controller controls lowest brightness regions of the modulator to a respective low-brightness throughput that maintains an about constant given low brightness output by the lowest brightness regions of the modulator across the frames.

A projector includes a light modulator, and a controller communicatively coupled to: an image source that provides frames to drive the light; and a light source arranged to illuminate the modulator according to colors. The controller, for a given image frame and given color: determines headroom of highest brightness pixels of the given frame, the headroom representing a difference between a peak brightness of a peak throughput of the modulator and a respective highest brightness associated with the highest brightness pixels; reduces a light source brightness to correspond to a peak light source brightness reduced by the headroom; controls highest brightness regions of the modulator to the peak throughput; and, based on reduced light source brightness, the controller controls lowest brightness regions of the modulator to a respective low-brightness throughput that maintains an about constant given low brightness output by the lowest brightness regions of the modulator across the frames.