Optical grating and dual-vision display device

Abstract

The embodiments of the present invention provide an optical grating and a dual-vision display device. With the optical grating adopted, the light effective utilization rate of the dual-vision display device comprising the optical grating can be improved. The optical grating comprises a plurality of strip-shaped light-transmitting units and light-shielding units located between adjacent every two light-transmitting units; and the light-transmitting unit includes a first strip-shaped convex lens unit and a second strip-shaped convex lens unit which are located at two sides of a center line located in the width direction of the corresponding light-transmitting unit and arranged closely side by side, so that light passing through the first convex lens unit and the second convex lens unit can be converged in a direction far away from the center line.

Description

technical field [0001] The invention relates to the field of optics, in particular to a grating and a dual-view display device. Background technique [0002] A grating is an optical element that uses the principle of multi-slit diffraction to disperse light. With the deepening of people's research, gratings are also more and more used in metrology, spectroscopy, optical communication, information processing, display technology, etc. [0003] Taking gratings applied to display technology as an example, the process of using gratings to achieve dual-view display effects will be further described. Such as Figure 1a As shown, it is a schematic structural diagram of a dual-view display in the prior art. The dual-view display device in the prior art includes a grating 01 located on the light-emitting side of the display panel 02. Under the action of the grating 01, the viewer on the left side Viewers can only see even (or odd) pixel columns when viewing, and viewers on the right ...

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Problems solved by technology

[0005] Based on this, for the entire display device, under the condition that the luminous efficiency of the light source is constant, due to the position at θ 盲 The outgoing light in the region cannot be used normally, so that the position at θ L and θ R The brightness of the effective outgoing light in the area is insufficient (usually the brightness value of this area is less than 200nit), for details, please refer to Figure 1b , that is, the dual-view display device in the prior art has low effective utilization of light

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