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941 results about "Pixel density" patented technology

Pixels per inch (ppi) and pixels per centimetre (ppcm or pixels/cm) are measurements of the pixel density (resolution) of an electronic image device, such as a computer monitor or television display, or image digitizing device such as a camera or image scanner. Horizontal and vertical density are usually the same, as most devices have square pixels, but differ on devices that have non-square pixels.

Image sensor pixel for global electronic shuttering

A pixel design for CMOS image sensors that has a high frame rate potential and, therefore, provides motion capture capabilities. The pixel is designed for global electronic shuttering so every pixel is exposed simultaneously to images incident upon the pixel array plane. The present invention has the advantages of: (1) Allowing the accommodation of changes in the pixel output groupings for different monochrome output format or CFA patterns with only changes in metal routing layers; (2) allowing true electronic shuttering to image moving scene with all the pixels having the same capture time windows; and (3) providing a symmetric global shutter gate and transfer gate to minimize pixel related fixed pattern noise. The pixel architecture provides for a CMOS based, active pixel image sensor comprising an array of pixels formed in rows and columns, with each of the pixels containing at least one active circuit element. There are a plurality of output channels formed such that each of the output channels are operatively connected to a subset of pixels wherein each of the pixel have an attribute that is the same. The pixel architecture also provides an output gate region and a shutter gate region that are symmetric about the center of the pixel. By arranging the shutter and transfer gates, a symmetric manner about the center of the pixel, a more efficient transfer of electrons to these gates is provided. A Pixel Output Bus structure allows configurable connections to column-wise signal busses that provide parallel output channels.
Owner:OMNIVISION TECH INC

Optical system for head mounted display

The present invention relates to a head mounted display that is constructed such that stereoscopic images can be seen on a liquid crystal display screen disposed adjacent to two human eyes. The present invention provides an optical system for a head mounted display, comprising a light source; a light guide panel which has a side portion, a top portion and a bottom portion, which receives light rays emitted from the light source through the side portion, reflects the light rays substantially perpendicular to a direction of the light rays, and emits the light rays toward the top portion, and which emits most of the light rays incident on the top portion through the bottom portion; a frontlight liquid crystal display screen which is disposed to face the top portion of the light guide panel and on which images are displayed by reflecting the light rays emitted from the top portion of the light guide panel and causing the light rays to be incident on the top portion of the light guide panel; and a free-form-surface prism disposed in front of the bottom portion of the light guide panel for magnifying the images on the liquid crystal display screen by reflecting and focusing the light rays which are reflected from the frontlight liquid crystal display screen and emitted toward the bottom portion of the light guide panel. According to the an optical system for a head mounted display of the present invention, there is an advantage in that its production costs can be reduced, since the optical system for the head mounted display of the present invention employs the frontlight liquid crystal display screen which is inexpensive and has a high pixel density. Further, there is another advantage in that the use efficiency of the light source can be enhanced, since the optical system of the present invention includes the inexpensive light emitting diode and the light guide panel for reflecting the light rays emitted from the light emitting diode and focusing the light rays within a range of the predetermined angles.
Owner:DAEYANG ENG

Optical system for head mounted display

The present invention relates to a head mounted display that is constructed such that stereoscopic images can be seen on a liquid crystal display screen disposed adjacent to eyes. The present invention provides an optical system for a head mounted display, comprising a light source; an illuminating prism for controlling an optical path of light rays from the light source by reflecting and refracting the light rays; a polarizer for polarizing the light rays emitted from the illuminating prism; a polarization beam splitter for reflecting the polarized light rays emitted from the polarizer; a frontlight liquid crystal display screen on which images are displayed by means of the light rays reflected by the polarization beam splitter; and a free-form-surface prism disposed in front of the polarization beam splitter for magnifying the images on the liquid crystal display screen by reflecting and converging the light rays emitted from the liquid crystal display screen. According to the present invention, since the optical system for the head mounted display employs the frontlight liquid crystal display screen which is inexpensive and has a high pixel density, there is an advantage in that its production costs can be reduced. Further, the optical system includes the inexpensive light emitting diode, and the illuminating prism and the plurality of sheets for diffusing and focusing the light rays emitted from the light emitting diode, so that the use efficiency of the light source can be enhanced.
Owner:DAEYANG ENG

Display panel and display device

ActiveCN110874990APromote lowerMitigating the impact of optical performanceTelevision system detailsColor television detailsPixel densityDisplay device
The embodiment of the invention provides a display panel and a display device. The display panel comprises a display area, wherein the display area comprises a first display area, a transition area and a second display area, wherein the sub-pixel density of the first display area, the transition area and the second display area is gradually increased. The first display area comprises a plurality of first sub-pixels, and a first pixel circuit for driving the first sub-pixels is located in the transition area, so that the light transmission area of the first display area is increased. The firstsub-pixels are electrically connected with the first pixel circuit through a connecting line. Each of a first line segment, a second line segment and a third line segment belongs to a different connecting line, and the first line segment, the second line segment and the third line segment all extend in a first direction and are sequentially arranged in a second direction. There is no gap between the first line segment and the second line segment arranged in sequence, and there is no gap between the second line segment and the third line segment arranged in sequence, so that the light transmittance of the first display area can be improved, the diffraction phenomenon when the light ray penetrates through the first display area is improved, and the optical performance of an under-screen optical device is improved.
Owner:WUHAN TIANMA MICRO ELECTRONICS CO LTD
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