3mm。 Many of Apple's previous patents on iPhone and iPad will more or less contain some practical functions, such as the Home button, the back contour design or the overall glass cover design of the front panel. However, the patent obtained this time only describes the appearance design of a device, with rectangular rounded corners.
The application of this patent is really too wide. Of course, it can be said that the portrait in the patent drawing limits this patent to devices with a specific aspect ratio, so that tablets with other sizes and proportions can still not be infringed.
given the circumferential angle α and the chord a of the circumferential angle, the radii r, 2r = a/sinα and r = a/2sinα can be found by using the sine theorem.
Extended data:
In the cylindrical coordinate system, there is a selected reference axis and a selected reference plane perpendicular to the axis. The starting point of the system is the point where all three coordinates can give zero. This is the intersection between the reference plane and the axis. The
axis is variously called a cylindrical or longitudinal axis in order to distinguish it from rays lying in the reference plane (starting from the origin and pointing in the reference direction).
The distance from the axis can be called radial distance or radius, and the angular coordinate is sometimes called angular position or azimuth. Radius and azimuth * * * are both called polar coordinates because they correspond to a two-dimensional polar coordinate system in a plane parallel to the reference plane. The third coordinate can be called height or height (if the reference plane is considered horizontal), longitudinal position or axial position.
in a spherical coordinate system, the radius represents the distance between a point and a fixed origin. If we further reach the zenith from the position where the polar angle and azimuth angle measured between the radial direction and the fixed zenith direction are orthogonal (that is, the angle between orthogonal projections on the reference plane passing through the origin), and fix the reference direction on this plane.
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