Abstract: A slit grating and a three-dimensional (3D) display apparatus including the slit grating are disclosed herein, the slit grating includes a plurality of grating structures (11-17) arranged side by side. The widths of the grating structures (11-17) increase and then decrease, along the direction in which the grating structures (11-17) are arranged. A grating structure (13,14) having the largest width may define a trend change point after which the trend in the widths of the grating structure widths changes.

Abstract: A curved grating structure, a display panel and the display device are provided. The curved grating structure includes multiple grating strips spaced from each other. Grating intervals between adjacent grating strips are successively decreased from a center point of the curved grating structure to a terminal of the curved grating structure. The grating interval between two adjacent grating strips is a distance in a first direction between center points of the two adjacent grating strips, and the first direction is a direction perpendicular to a normal vector of the curved grating structure passing through a center point of the curved grating structure.

Abstract: A slit grating and a three-dimensional (3D) display apparatus including the slit grating are disclosed herein, the slit grating includes a plurality of grating structures (11-17) arranged side by side. The widths of the grating structures (11-17) increase and then decrease, along the direction in which the grating structures (11-17) are arranged. A grating structure (13,14) having the largest width may define a trend change point after which the trend in the widths of the grating structure widths changes.

Abstract: A curved grating structure, a display panel and the display device are provided. The curved grating structure includes multiple grating strips spaced from each other. Grating intervals between adjacent grating strips are successively decreased from a center point of the curved grating structure to a terminal of the curved grating structure. The grating interval between two adjacent grating strips is a distance in a first direction between center points of the two adjacent grating strips, and the first direction is a direction perpendicular to a normal vector of the curved grating structure passing through a center point of the curved grating structure.

Abstract: A position detecting device is provided, which is configured to minimize leakage of magnetic flux in an electromagnetic induction system. The position detecting device includes: a sensor unit including a plurality of first loop coils arranged in a first direction and a plurality of second loop coils arranged in a second direction intersecting with the first direction; a yoke sheet provided on a side of the sensor unit that is opposite to a side that faces a position indicator; an auxiliary loop coil provided at a corner part of the sensor unit; a signal transmitter configured to transmit a signal to one of the coils in order to generate a magnetic field to induce an induced current in a coil of the position indicator; and a controller configured to select one of the coils, and to control whether to transmit a signal from the signal transmitter to the selected one of the coils or to make the selected one of the coils receive a signal from the position indicator.

Abstract: A position detecting device is provided, which is configured to minimize leakage of magnetic flux in an electromagnetic induction system. The position detecting device includes: a sensor unit including a plurality of first loop coils arranged in a first direction and a plurality of second loop coils arranged in a second direction intersecting with the first direction; a yoke sheet provided on a side of the sensor unit that is opposite to a side that faces a position indicator; an auxiliary loop coil provided at a corner part of the sensor unit; a signal transmitter configured to transmit a signal to one of the coils in order to generate a magnetic field to induce an induced current in a coil of the position indicator; and a controller configured to select one of the coils, and to control whether to transmit a signal from the signal transmitter to the selected one of the coils or to make the selected one of the coils receive a signal from the position indicator.