CN101408692A - Improved structure of stereo liquid crystal display - Google Patents

Abstract

The invention relates to a structure improvement of a three-dimensional liquid crystal display, which comprises two liquid crystal display panels; an optical film with non-polarization effect and capable of allowing light to penetrate; the optical film is arranged between the two liquid crystal display panels, the upper surface and the lower surface of the lower liquid crystal display panel are provided with the upper polarizer and the lower polarizer, and the upper surface of the upper liquid crystal display panel is provided with the retardation film, so when an observer can wear the polarized glasses to watch images, the two liquid crystal display panels can respectively display left-eye pictures and right-eye pictures through the three-dimensional liquid crystal display, and the depth effect generated by the two liquid crystal display panels can be displayed simultaneously, so that the three-dimensional images are better highlighted, and the phenomenon of bright-dark double stripes (Morrie) of the three-dimensional images caused by optical interference can be eliminated.

Description

Structural Improvement of Stereoscopic Liquid Crystal Display

technical field

The invention relates to a liquid crystal stereoscopic display, in particular to a structure improvement of a stereoscopic liquid crystal display which can make viewers see more prominent stereoscopic images.

Background technique

Generally, stereoscopic images are formed based on the principle of stereo eyesight through human eyes, that is, binocular parallax occurs due to the existence of a distance of about 65 mm between the eyes. In other words, the eyes see through the retina two different two-dimensional (2D) images transmitted to the brain, and the brain combines the two images to reproduce the depth and solidity of the real image.

And one of the stereoscopic imaging devices includes a microlens and a parallax barrier. The stereoscopic imaging device may combine or add a conversion device to display 2D images and 3D images. For example, add a conversion unit and a microlens with refractive anisotropy (refer to International Patent (WO patent) No. 03/015424-A2), or combine a conversion unit and a retarder (retarder) (refer to the U.S. Patent No. 6,046,849, No. 6,055,013, No. 6,437,915), or a combination of a conversion unit and a polarizing plate provided with slits (refer to U.S. Patent No. 4,717,949, No. 6,157,424) can make the stereoscopic imaging device capable of combining 2D images and 3D images are converted to each other.

The stereoscopic image display device using the microlens typically includes a display panel, a microlens panel, and a conversion unit. The microlens panel is the most important part, and as the microlens panel is precisely manufactured, the stereoscopic image display device can clearly display stereoscopic images. However, microlenses formed on the microlens panel have many problems in terms of manufacturing time.

In addition, the design of the grating is also used to separate the images seen by the left and right eyes. The principle is to add a twisted nematic grating or two sets of twisted nematic gratings to the liquid crystal display module, as shown in Taiwan Patent Publication No. In the No. 266077 patent, two sets of complementary nematic gratings are respectively turned on at odd or even frequencies, so that the left and right eyes can see an independent image at odd and even frequencies, thereby forming a three-dimensional image. Since the left and right images are on the same display panel, although stereoscopic images can be produced, visual depth cannot be expressed.

Contents of the invention

The main purpose of the present invention is to provide a three-dimensional liquid crystal display, which displays images for the left and right eyes respectively through two liquid crystal display panels, and simultaneously displays the depth effect generated by the two liquid crystal display panels, so that the three-dimensional image is better highlighted.

The second object of the present invention is to generate a distance between the first liquid crystal panel and the second panel through the optical film between the two liquid crystal panels, so that the light passing through the liquid crystal crystal hole (CELL) will not be affected by The influence of light-transmitting pores on the spacing of liquid crystal crystal holes (CELLs) can overcome the phenomenon of light and dark moiré caused by diffraction and light interference.

The third purpose of the present invention is to generate a distance between the two panels by means of the surface structure of the optical film, and also to generate an air gap in the optical film, so that the glass will not be glued together, and the problem of adhesion can be avoided. Spot situation.

Therefore, the structure of the three-dimensional liquid crystal display of the present invention is composed of two liquid crystal display panels and an optical film in the middle, which can be used to destroy and eliminate the light interference phenomenon of light and dark moiré in the liquid crystal display.

Description of drawings

Fig. 1 is the structural representation of the stereo liquid crystal display of the first embodiment in the present invention;

Fig. 2 is a schematic diagram of the optical film structure of the first embodiment of the present invention;

FIG. 3 is a schematic diagram of the optical film structure of the second embodiment of the present invention.

【Description of figure number】

a first air gap b second air gap

11The first LCD panel 12Optical film

13 The second LCD panel 131 Upper polarizer

132 polarizers 14 backlight components

15 retardation film 21 substrate

22 optical resin layer 23 optical resin layer

24 Optical Microstructures

Detailed ways

In order to allow the above-mentioned purpose, functional characteristics, and advantages of the present invention to be more clearly understood, the present invention will be described in detail below with preferred examples and accompanying drawings:

Please refer to Fig. 1, the three-dimensional liquid crystal display of the first embodiment of the present invention comprises two liquid crystal display panels, which are respectively the first and second liquid crystal display panels 11, 13, at least one optical film 12 without polarization effect, and a retardation film 15 and a backlight assembly 14, wherein the first liquid crystal display panel 11 is arranged above the second liquid crystal display panel 13, and the upper and lower surfaces of the second liquid crystal display panel 13 are provided with upper and lower polarizers 131, 132, the The optical film 12 is arranged between the upper polarizer 131 and the first liquid crystal display panel 11, wherein the first display panel 11 and the optical film 12 naturally form a first air gap a; and the upper polarizer 131 and the optical film 12 The other surface of the other surface forms a second air gap b; the retardation film 15 is arranged on the upper surface of the first liquid crystal display panel 11, and the uniform plane light provided by the backlight assembly 14 can be arranged on the second liquid crystal display panel. Below the display panel 13 , and the backlight assembly 14 can be an edge type backlight assembly or a direct type backlight assembly. In the embodiment shown in the figure, the backlight assembly 14 is a direct type backlight assembly.

During specific use, the light emitted by the backlight assembly 14 can form light waves of different polarities after passing through the first and second liquid crystal display panels 11 and 13 respectively. The lenses of the right two eyes individually only allow light waves passing through the first and second liquid crystal display panels 11, 13 to produce a three-dimensional effect for the left and right eyes; The pixel pitch of the liquid crystal display panel is proportional to the aperture ratio. When the light passes through, the proportional pitch can destroy the diffraction interference phenomenon of the light, so that the light and dark moiré phenomenon can be solved; in addition, due to the two liquid crystal display panels, the There is an appropriate distance, so when viewed, there is a certain depth effect visually, so that the three-dimensional image is better highlighted.

Please refer to Fig. 2, the optical film structural diagram of the first embodiment of the present invention, this optical film 12 is a substrate 21 and its two surfaces then are made of optical resin layers 22, 23, the optical of this upper surface or lower surface The resin layers 22, 23 can be further provided with an optical microstructure. In the embodiment shown in the figure, the optical resin layer 22 on the upper surface is provided with an optical microstructure 24, and the optical microstructure 24 can be a protruding optical tree. The structure 24 on the surface of the ester layer 22 makes the surface have a certain roughness, so that the optical resin layer has the effect of anti-reflection, increasing the incident light, and improving the brightness; The gap makes the light refracted four times more, which can avoid the phenomenon of light passing through; of course, optical microstructures 24 can also be provided on the optical resin layers 22 and 23 on the upper surface and the lower surface at the same time, as shown in FIG. 3 , The optical microstructure 24 may be a structure that is recessed into the surfaces 22 and 23 of the optical resin layer.

The substrate 21 is a material with no stress residue and no birefringence, and its material is preferably polyethylene terephthalate (PET), polycarbonate (PC), polymethyl methacrylate PMMA, polycycloolefin Polymer (COP), epoxy resin (EXOPY), polystyrene (PS) and other related polymer materials, cellulose derivatives (such as cellulose ester, cellulose ether or low-carbon fatty acid ester of cellulose, triacetate fiber element), orthobornene-based polymers or ethylene-based polymers (such as polymethyl methacrylate), and the substrate is stretched at a stretching ratio of 3-100%; moreover, the substrate can also be It is produced by melt extrusion using heat-melted polymers, or by solution casting using coating paints containing additives, particles, solvents, and polymers (such as cellulose acylate).

And the material of optical resin layer 22,23 can be epoxy resin, melamine resin (Melami), polyurethane (PU), polymethyl methacrylate (PMMA), vinyl acetate Ester copolymer (EVA), polyvinyl alcohol (PVA) or a combination thereof, can also be mixed with organic diffusion particles, the material is preferably polymethyl methacrylate (PMMA), polyvinyl chloride (PVC), silica gel (silicon) , polyaminomethyl ester (PU-polyurethane), polystyrene (PS-polystyrene) or a combination thereof, or inorganic diffusion particles whose material is preferably silicon oxide (SiO ₂ ), aluminum oxide (Al ₂ O ₃ ) or a combination thereof.

It is worth mentioning that the optical film of the present invention has no effect on the polarization of light and can allow polarized light to pass through, and the optical film is arranged between two liquid crystal display panels, and the surface of the optical film can further An optical microstructure is provided, and the optical microstructure can effectively eliminate the Morrie phenomenon of the three-dimensional image due to optical interference.

As mentioned above, the present invention is preferably feasible to improve the structure of the three-dimensional liquid crystal display, so the application for the invention patent is submitted according to the law; however, the above implementation description and drawings show the preferred embodiments of the present invention, which are not intended to limit the present invention Therefore, all similar and identical structures, devices, and features of the present invention should fall within the creation purpose of the present invention and the scope of the patent application.

Claims (10)

1. A structural improvement of a three-dimensional liquid crystal display, which is at least provided with: Two liquid crystal display panels, respectively the first and second liquid crystal display panels, the first liquid crystal display panel is arranged above the second liquid crystal display panel, and the upper and lower surfaces of the second liquid crystal display panel are provided with upper and lower polarizers ; At least one optical film without polarizing effect, the optical film is arranged between the upper polarizer and the first liquid crystal display panel. 2. The improved structure of a three-dimensional liquid crystal display according to claim 1, wherein a first air gap is formed between the upper polarizer and the optical film, and a second air gap is formed between the first liquid crystal display panel and the optical film. 3. The improved structure of a three-dimensional liquid crystal display as claimed in claim 1, wherein a retardation film is provided on the upper surface of the first liquid crystal display panel. 4. The improved structure of a three-dimensional liquid crystal display as claimed in claim 1, wherein a backlight assembly is provided under the first liquid crystal display panel. 5. The structural improvement of a three-dimensional liquid crystal display as claimed in claim 1, wherein the optical film is mainly composed of a substrate, and the upper and lower surfaces of the substrate are optical resin layers. 6. The structural improvement of a three-dimensional liquid crystal display as claimed in claim 5, wherein the substrate is made of a material with no stress residue and no birefringence. 7. The structural improvement of a three-dimensional liquid crystal display as claimed in claim 5, wherein organic or inorganic diffusion particles can be mixed in the optical resin layer. 8. The improved structure of a three-dimensional liquid crystal display as claimed in claim 5, wherein the optical resin layer on the upper surface or the lower surface can further be provided with an optical microstructure. 9. The improved structure of a three-dimensional liquid crystal display as claimed in claim 5, wherein the optical resin layer on the upper surface and the lower surface can further be provided with an optical microstructure. 10. The structural improvement of a three-dimensional liquid crystal display according to claim 8 or 9, wherein the optical microstructure may be a structure protruding or concave on the surface of the optical resin layer.

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