Image light deflection device
A technology of deflection device and light, applied in the direction of optics, optical elements, diffraction grating, etc., can solve the problem of gray scale inversion and achieve the effect of gray scale inversion
Active Publication Date: 2014-11-19
CM VISUAL TECH CORP
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Problems solved by technology
Usually, the wide viewing angle compensation film is different from the general polymer film, but it is composed of a discotic compound, which can increase the left and right viewing angles to 140 degrees and the up and down viewing angles to 120 degrees, but it does not solve the problem of grayscale inversion
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[0032] The implementation of the present invention will be described in more detail below with reference to the accompanying drawings and component symbols, so that those familiar with the art can implement it after studying this specification.
[0033] The technical feature of the present invention is to use the method of making a hologram to form a grating film. By arranging the grating film on a light-transmitting sheet or a display to expand the viewing angle or deflect it to a specific display angle, and then show special visual effects, especially Directly applied to TN displays with high light transmittance.
[0034] A hologram showing a stereoscopic image or a hologram is mainly formed by using holography to record two highly coherent (Coherent) lights at different angles (such as laser light generated by a beam splitter) One of the light beams is projected onto the photosensitive sheet after being reflected by the target object, and the other light beam is also projec...
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The invention relates to an image light deflection device, which is used for deflecting image light emitted from outside to generate emergent light capable of being deflected to a specific direction and projected to the outside, and comprises a grating film and a light-transmitting piece, wherein the grating film is piled on the light-transmitting piece, and the grating film is made of a light-transmitting material and has a surface microstructure; the surface microstructure is made by a hologram process, can comprise a plurality of protrusions, ridges, depressions or grooves, and can generate visual effects which can enlarge an angle of view or change a light exit angle so as to increase the viewing angle of viewers and enhance the display effect of image information, or prevent the emergent light from being projected to other light direction without display effect, so that the brightness of a light source is reduced, the power consumption of electric power is saved, and the purpose of energy saving is achieved.
Description
technical field [0001] The invention relates to an optical film for deflecting image light, especially for deflecting image light to a specific orientation. Background technique [0002] Currently commercially available large-size liquid crystal displays, the most common ones are Twisted Nematic (TN) displays, In-Plane Switching (IPS) displays, and Multi-Domain Vertical Alignment (MVA) displays. monitor. [0003] The traditional TN display uses the upper and lower electrodes to apply voltage on the upper and lower sides of the liquid crystal layer to generate a vertical electric field, twisting the liquid crystal molecules to change the polarization state of the incident light, and then cooperate with the upper and lower polarizers and color filters whose optical axes are perpendicular to each other In order to produce the required color images, the biggest problem with TN displays is that the viewing angle is too narrow, especially at the lower viewing angle, there will be...
Claims
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IPC IPC(8): G02B27/42G02B5/18
Inventor 伍庭毅
Owner CM VISUAL TECH CORP