KR20120129764A - Polarization module and image display apparatus - Google Patents

Abstract

PURPOSE: A polarized light module and an image displaying device are provided to increase moisture resisting performance, thereby providing a high quality image. CONSTITUTION: A plurality of first 1/4 wavelength plates(2) is arrange on a polarizing plate. A plurality of the first 1/4 wavelength plates is arranged so that an optic axis inclines 45 degrees for a polarizing axis of the polarizing plate. A plurality of second 1/4 wavelength plates(3) is arranged on the polarizing plate. A plurality of the second 1/4 wavelength plates is arranged so that the optic axis inclines 45 degrees for the polarizing axis of the polarizing plate. Optic axes of a plurality of the second 1/4 wavelength plates are arranged an opposite direction which is different from the optic axes of A plurality of the first 1/4 wavelength plates.

Description

POLARIZATION MODULE AND IMAGE DISPLAY APPARATUS}

The present technology relates to a polarizing module for displaying a stereoscopic image and an image display device using the same.

In recent years, development of the image display apparatus which provides a three-dimensional image is progressing. In such an image display apparatus, the image corresponding to the parallax between a right eye and a left eye is respectively displayed. For example, the observer wears glasses provided with a filter that selectively transmits the light from the right eye image and a filter that selectively transmits the light from the left eye image to the observer's right eye lens and the left eye lens, respectively. The image can be visually recognized.

For example, since an image for a right eye and an image for a left eye can select either one by the above-mentioned filter etc., they are respectively displayed by the light from which a polarization direction differs from each other (for example, refer following patent document 1).

For example, Patent Document 1 discloses dividing a right eye image and a left eye image by using two kinds of linearly polarized light having different polarization directions 90 degrees from each other.

That is, light from the liquid crystal panel is first converted into linearly polarized light by the polarizing plate. Next, the light of linearly polarized light, for example, the light of an image for a right eye transmits a phase difference film, and a polarization direction rotates 90 degrees. On the other hand, since the light of the left eye image does not transmit the retardation film, the polarization direction does not change. Thereby, the light of the right eye image and the light of the left eye image which differ from each other by 90 degree polarization directions are provided to an observer.

In addition, the observer visually recognizes a stereoscopic image by using a polarizing filter that transmits only the right polarized light and a polarization filter that transmits only the left eye linearly polarized light, respectively, disposed on the right eye lens and the left eye lens.

In addition, Patent Document 2 discloses disposing the retardation film (wavelength plate filter) in a band shape by skipping one horizontal line of pixels of the liquid crystal display unit.

[Patent Document 1] Japanese Patent Application Laid-Open No. 2004-109528 [Patent Document 2] Japanese Patent Application Laid-Open No. 2005-173033

As described above, in the image display device for providing a three-dimensional image, the left eye light and the right eye light are outputted separately. Therefore, compared with the conventional two-dimensional image display device, for example, a new member such as the polarizing plate and the retardation film described above. It is necessary to prepare.

Since such a member is disposed on the image display surface side of the image display device, high resistance to the surrounding environment is required.

In view of the foregoing, it is an object of the present technology to provide a polarization module and an image display device having high environmental resistance.

MEANS TO SOLVE THE PROBLEM In order to solve the said subject, the polarizing module of this technology includes a polarizing plate and the some 1st quarter wave plate arrange | positioned so that an optical axis may incline 45 degree with respect to the polarization axis of a polarizing plate.

Further, the polarizing module of the present technology is disposed on the polarizing plate, and the plurality of second quarters arranged such that the optical axis is inclined 45 degrees in the direction opposite to the optical axis of the first quarter wave plate with respect to the polarization axis of the polarizing plate. And a wave plate.

In addition, the image display apparatus of the present technology includes a display panel having a first pixel region displaying an image corresponding to parallax of the right eye, a second pixel region displaying an image corresponding to parallax of the left eye, and on the display panel. It includes the aforementioned polarizing module.

In this case, the first quarter wave plate is disposed to face the first pixel region of the display panel, and the second quarter wave plate is disposed to face the second pixel region of the display panel.

According to the polarizing module and image display device of the present technology, all the quarter wave plates are arranged on one polarizing plate.

According to the polarizing module and the image display device of the present technology, the moisture resistance performance can be improved, and a high quality image can be provided.

1 (a), 1 (b) and 1 (c) are schematic configuration diagrams showing the configuration of a polarizing module according to a first embodiment of the present technology.
2 is a diagram illustrating a polarization module and a display panel according to the first embodiment of the present technology.
3 is a schematic configuration diagram showing a polarization module of a comparative example.
4 (a), 4 (b) and 4 (c) are schematic configuration diagrams showing the configuration of a polarizing module according to a second embodiment.
5 is a perspective view illustrating an image display device according to a third embodiment.

Hereinafter, although the example of the form for implementing this technique is demonstrated, this technique is not limited to the following example.

The description is made in the following order.

1. First Embodiment (Example of Arrangement of Wavelength Plates in One-Dimensional Direction)

2. Second Embodiment (Example of Arrangement of Wavelength Plates in Two-Dimensional Direction)

3. Third embodiment (example of image display device)

1. First Embodiment (Example of Arrangement of Wavelength Plates in One-Dimensional Direction)

FIG.1 (a)-FIG.1 (c) is a schematic block diagram which shows the structure of the polarizing module 100 which concerns on 1st Embodiment. FIG. 1A is a view of the polarization module 100 viewed in a direction perpendicular to one main surface (Z-axis direction), and FIG. 1B is a view of the polarization module 100 viewed from the Y-axis direction. . 1C is a view of the polarization module 100 viewed in the X-axis direction.

The polarizing module 100 of the present embodiment includes a plurality of first wave plates 2 (first quarter wave plates) and a plurality of second plates disposed on one main surface of the polarizing plate 1 and the polarizing plate 1. The wave plate 3 (second quarter wave plate) is provided.

The polarizing plate 1 is not particularly limited as long as it transmits only light in a predetermined polarization direction. For example, a typical polarizing plate used in an image display device includes a dichroic substance such as iodine or a dichroic dye, uniaxially stretched a resin containing polyvinyl alcohol (PVA) as a main component, and both surfaces of the film. It is comprised by the protective film which stuck together. The polarizing plate 1 of this embodiment should just be a structure similar to this.

A plurality of first wave plates 2 and a plurality of second wave plates 3 are disposed on one main surface of the polarizing plate 1. The first wave plate 2 and the second wave plate 3 are fixed to the polarizing plate 1 by the adhesive layer 5. This adhesive layer 5 is comprised from a transparent adhesive agent, a transparent adhesive tape, etc., for example.

The same quarter wave plate can be used for the first wave plate 2 and the second wave plate 3.

However, the optical waveshaft of the 1st wave plate 2 is arrange | positioned inclined +45 degree with respect to the polarization axis (ground axis) of the polarizing plate 1, for example, whereas the 2nd wave plate 3 has the optical axis It is arrange | positioned inclined at -45 degrees with respect to the polarization axis of this polarizing plate 1. That is, the optical axis of the second wave plate 3 is disposed at an angle of 45 ° to the direction opposite to the optical axis of the first wave plate 2 with respect to the polarization axis of the polarizing plate 1.

Therefore, the second wave plate 3 is placed on the polarizing plate 1 with the front and back sides of the first wave plate 2 reversed.

As shown in Fig. 1A, the first wave plate 2 and the second wave plate 3 each have a rectangular main surface, and the first wave plate 2 and the first wave plate 2 are formed in the short side direction. The two wave plates 3 are alternately arranged.

In addition, the light transmissive cover panel 4 is arrange | positioned on the some 1st wave plate 2 and the some 2nd wave plate 3. For the cover panel 4, a light-transmissive plastic substrate, a glass substrate, etc. can be used, for example. The cover panel 4 is fixed to the first wave plate 2 and the second wave plate 3 by the adhesive layer 6. As the adhesive layer 6, the same one as the adhesive layer 5 may be used.

By arranging the cover panel 4 on the first wave plate 2 and the second wave plate 3, the surface of the polarizing module 100 is planarized and the first wave plate 2 and the second wave plate (3) can be protected.

In addition, you may perform anti-reflection processing, such as providing an anti-reflective film, for example on the main surface of the cover panel 4 on the opposite side to the polarizing plate 1 side.

As shown in FIG. 2, this polarizing module 100 is provided so as to overlap the image display surface side of the display panel 10. In this case, the polarization module 100 overlaps the polarizing plate 1 side with respect to the display panel 10. Light emitted from the display panel 10 passes through the polarization module 100 and reaches the observer's eye, as indicated by arrow A1.

On the image display surface of the display panel 10, for example, pixels 11 of three primary colors of R (red), G (green), and B (blue) are arranged in a matrix. The pixel 11 may be, for example, a liquid crystal display pixel, or may be an LED (Light Emitting Diode) when constituting a large-area display screen.

In addition, among these pixels 11, pixels arranged in, for example, the first pixel region represented by the columns R1 to R4 display images for the right eye and are arranged in the second pixel region represented by the columns L1 to L4. Displays an image for the left eye.

By superimposing the polarization module 100 on the display panel 10, for example, the first wave plate 2 is disposed on the first pixel region of the columns R1 to R4, and the second pixels of the columns L1 to L4 are arranged. On the region, for example, the second wave plate 3 is disposed.

1 (a) to 1 (c) and 2, the polarizing module 100 and the display panel 10 are schematically illustrated, and the first wavelength plate 2 and the second wavelength are shown. The size, the number of arrangement | positioning, etc. of each structural member, such as the board 3 and the pixel 11, are changed suitably.

Light emitted from the pixels arranged in the first pixel regions of the columns R1 to R4 becomes linearly polarized light by passing through the polarizing plate 1 of the polarizing module 100, and then enters the first wavelength plate 2. Since the optical axis of the first wavelength plate 2 is inclined 45 ° with respect to the polarization axis of the polarizing plate 1, the light transmitted through the first wavelength plate 2 becomes circularly polarized light.

Further, the light emitted from the pixels arranged in the second pixel regions of the columns L1 to L4 becomes linearly polarized light by passing through the polarizing plate 1, and then enters the second wavelength plate 3. Since the optical axis of the second wave plate 3 is inclined 45 ° in the direction opposite to the optical axis of the first wave plate 2 with respect to the polarization axis of the polarizing plate 1, the light transmitted through the second wave plate 3 is transmitted. Silver becomes circularly polarized light whose rotation direction is opposite to the light transmitted through the first wave plate 2.

In this way, the light emitted from the pixels arranged in the first pixel regions of the columns R1 to R4 and the light emitted from the pixels arranged in the second pixel regions of the columns L1 to L4 are transmitted through the polarization module 100, The rotation directions are circularly polarized light opposite to each other.

The observer spectacles the circularly polarized light filter transmitting the circularly polarized light from the pixel areas of the columns L1 to L4 and the circularly polarized light filter transmitting the circularly polarized light from the pixel areas of the columns R1 to R4 to the right eye. By writing, three-dimensional images can be recognized.

In addition, in the polarization module 100 of the present embodiment, as shown in FIGS. 1A to 1C, all the first wavelength plates 2 and the second wavelength plates 3 are 1. It is arrange | positioned on the polarizing plate 1 of a sheet.

As a comparative example, FIG. 3 shows a case where a plurality of corresponding polarizing plates are arranged on a plurality of wave plates. At this time, the shape of the main surface of each polarizing plate shall be the same as that of the wave plate.

In the polarizing module 110 shown in FIG. 3, the first wave plate 22 and the second wave plate 23 are fixed to the cover panel 24 by the adhesive layer 26. These structures are the same as that of the 1st wave plate 2, the 2nd wave plate 3, and the cover panel 4 shown to FIG. 1 (a)-FIG. 1 (c).

However, in this comparative example, the polarizing plates 21 divided into a plurality of the first wave plate 22 and the second wave plate 23 are bonded one by one by the adhesive layer 25.

Thus, when a some polarizing plate is arrange | positioned, the sum total of the area of the edge part of the polarizing plate 21 as shown, for example on the surface 21a becomes large. For this reason, deterioration from the edge part of the polarizing plate 21 tends to occur.

For example, although polyvinyl alcohol exists in one of the resin materials which comprise a general polarizing plate, polyvinyl alcohol has very strong hydrophilicity. For this reason, when the sum total of the area of the edge part of the polarizing plate 21 is large, for example, when surrounding humidity is high, vinyl alcohol elutes with water droplets from the edge part of the polarizing plate 21, and the polarizing plate 21 will There is a risk of deterioration.

On the other hand, in the polarizing module 100 of this embodiment, all the 1st wave plate 2 and the 2nd wave plate 3 are arrange | positioned on one polarizing plate 1. Thereby, since the area of the edge part of the polarizing plate 1 can be made small, it can suppress that water-soluble components, such as polyvinyl alcohol, for example, elutes with respect to water from an edge part. For this reason, it is possible to raise resistance to moisture.

In addition, by configuring the polarizing module 100 by one polarizing plate 1, it is possible to flatten the surface of the polarizing module 100, and also improve the mechanical strength as a module.

2. Second Embodiment (Example of Arrangement of Wavelength Plates in Two-Dimensional Direction)

What is necessary is just to change the external shape and arrangement pattern of each wavelength plate suitably according to the arrangement | positioning of the right eye pixel and left eye pixel of a display panel.

For example, the case where a 1st wave plate and a 2nd wave plate are arrange | positioned in matrix form (check pattern shape) is illustrated here.

4A to 4C are schematic configuration diagrams showing the configuration of the polarization module 200 according to the second embodiment. 4A is a view of the polarization module 200 viewed in a direction perpendicular to one main surface (Z-axis direction), and FIG. 4B is a view of the polarization module 200 viewed in the Y-axis direction. . 4C is a view of the polarization module 200 viewed in the X-axis direction.

In addition, the same code | symbol is attached | subjected to the site | part corresponding to 1st Embodiment (refer FIG. 1), and overlapping description is avoided.

The polarizing module 200 of this embodiment is equipped with one polarizing plate 1, the 1st wavelength plate 2a, the 2nd wavelength plate 3a, and the cover panel 4. As shown in FIG. The structure of these and the adhesive layers 5 and 6 which adhere them are basically the polarizing plate 1, the first wavelength plate 2, the second wavelength plate 3, and the cover panel 4 disclosed in the first embodiment. ), And the same. However, in this embodiment, the external shape of the 1st wave plate 2a and the 2nd wave plate 3a, and the arrangement of the 1st wave plate 2a and the 2nd wave plate 3a are the same as that of 1st Embodiment. It is different.

For example, the first wave plate 2a and the second wave plate 3a have a square shape in the light emission direction (Z-axis direction). In addition, the first wave plate 2a and the second wave plate 3a are alternately arranged in two axis directions (the X axis direction and the Y axis direction in FIG. 4) orthogonal to each other in the in-plane direction of the polarizing plate 1. . That is, the first wave plate 2a and the second wave plate 3a are arranged in a so-called checkered shape.

The polarizing module 200 is provided in a display panel in which a pixel region displaying a left eye image and a pixel region displaying a right eye image are similarly arranged in a checkered pattern. The number of pixels to be allocated to one first wave plate 2a and the second wave plate 3a may be appropriately set, and the first wave plate 2a and the first wave plate 2a and the second wave plate 3a may be appropriately set. The size of the two wave plates 3a is determined.

Also in the polarizing module 200 of this embodiment, all the 1st wave plate 2a and the 2nd wave plate 3a are arrange | positioned on one polarizing plate 1. Thereby, since the area of the edge part of the polarizing plate 1 can be made small, the moisture resistance performance of the polarizing module 200 can be improved.

In addition, other effects are the same as in the first embodiment.

3. Third embodiment (example of image display device)

5 is a perspective view illustrating the image display device 300 according to the third embodiment. In the image display device 300 of the present embodiment, a polarization module 32 is disposed on the image display unit 31.

The image display unit 31 is configured by, for example, the display panel 10 (see FIG. 2) disclosed in the first embodiment. For example, in the image display unit 31, one pixel area is allocated for each intersection of a plurality of scan lines and a plurality of signal lines arranged in a direction perpendicular to the scan line. Further, for example, a semiconductor device for driving a pixel for each pixel is disposed.

For example, the scan line is connected to a scan line driver circuit (not shown), and the semiconductor device is turned on by a pulse voltage from the scan line driver circuit.

When the semiconductor device is turned on, a video signal corresponding to luminance information is supplied from a signal driving circuit to a light emitting element such as an LED, for example. The light emitting element emits light at the luminance corresponding to the current value of this video signal, thereby displaying an image.

Further, video signals corresponding to the right eye image and the left eye image are supplied from the signal driving circuit to the light emitting elements in the pixel region displaying the right eye image and the left eye image of the display panel 10, respectively. .

As the polarization module 32, for example, the polarization module 100 disclosed in the first embodiment (see FIG. 1) or the polarization module 200 disclosed in the second embodiment (see FIG. 4) is used.

As described above, in the polarizing modules 100 and 200, since all the wave plates are arranged on one polarizing plate, the area of the edge portion of the polarizing plate can be reduced. Since the polarization modules 100 and 200 are used in the image display apparatus 300 of this embodiment, it is possible to improve moisture resistance and can provide a high quality stereoscopic image.

In the above, embodiment of a polarizing module and an image display apparatus was described. The present technology is not limited to the above embodiments, and includes various forms contemplated without departing from the gist of the present technology described in the claims.

In addition, this technology can also take the following structures.

(One)

With a polarizer,

A plurality of first quarter wave plates disposed on the polarizing plate and arranged such that the optical axis is inclined at 45 degrees with respect to the polarization axis of the polarizing plate;

A plurality of second quarter wave plates disposed on the polarizing plate and arranged such that the optical axis is inclined 45 degrees in a direction opposite to the optical axis of the first quarter wave plate with respect to the polarization axis of the polarizing plate. Polarizing module comprising.

(2)

The polarizing module according to (1), wherein the first wave plate and the second wave plate form a long rectangular shape and are alternately arranged in the short axis direction.

(3)

The polarizing module according to (1), wherein the first wave plate and the second wave plate are alternately arranged in a checkered shape.

(4)

The polarizing module as described in (1)-(3) containing the cover panel arrange | positioned on a said 1st quarter wave plate and a said 2nd quarter wave plate.

(5)

A display panel having a first pixel region displaying a right eye image, a second pixel region displaying a left eye image,

A plurality of first quarter wave plates disposed on the display panel, disposed on the polarizing plate, on the polarizing plate, and arranged such that the optical axis is inclined by 45 degrees with respect to the polarization axis of the polarizing plate; And a plurality of second quarter wave plates arranged so that the optical axis is inclined 45 degrees in a direction opposite to the optical axis of the first quarter wave plate with respect to the polarization axis of the polarizing plate. The display panel is provided on a surface on the side opposite to the first and second quarter wave plate sides of the plurality of first quarter wave plates, and the plurality of first quarter wave plates are disposed to face the first pixel region of the display panel. And a polarization module in which the plurality of second quarter wave plates are disposed to face the second pixel area of the display panel.

1: polarizer
2, 2a: first wave plate
3, 3a: second wave plate
4: cover panel
5: adhesive layer
6: adhesive layer
10: display panel
11: pixel
21: polarizer
21a: cotton
22: first wave plate
23: second wave plate
24: cover panel
25: adhesive layer
26: Adhesive layer
31: image display unit
32, 100, 110, 200: polarization module
300: image display device

Claims (5)

As a polarizing module,
With a polarizer,
A plurality of first quarter wave plates disposed on the polarizing plate and arranged such that the optical axis is inclined at 45 degrees with respect to the polarization axis of the polarizing plate;
A plurality of second quarter wave plates disposed on the polarizing plate and arranged such that the optical axis is inclined 45 degrees in a direction opposite to the optical axis of the first quarter wave plate with respect to the polarization axis of the polarizing plate. Including, polarizing module. The polarizing module according to claim 1, wherein the first quarter wave plate and the second quarter wave plate have a rectangular main surface and are alternately arranged in a short side direction thereof. The polarizing module of claim 1, wherein the first quarter wave plate and the second quarter wave plate are alternately disposed in a matrix shape. The polarizing module according to claim 2 or 3, further comprising cover panels disposed on the plurality of first quarter wave plates and the plurality of second quarter wave plates. As an image display apparatus,
A display panel having a first pixel region displaying a right eye image, a second pixel region displaying a left eye image,
A polarizing plate disposed on the display panel, a plurality of first quarter wave plates disposed on the polarizing plate and arranged to incline 45 degrees with respect to the polarization axis of the polarizing plate, and disposed on the polarizing plate, and A plurality of second quarter wave plates arranged such that the optical axis is inclined 45 degrees in a direction opposite to the optical axis of the first quarter wave plate with respect to the polarization axis of the polarizing plate, wherein the first quarter of the polarizing plate And the display panel is provided on a surface on the side opposite to the second quarter wave plate side, and the plurality of first quarter wave plates are disposed to face the first pixel region of the display panel. And a second quarter wave plate of which a polarization module is disposed opposite to said second pixel region of said display panel.

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