JPH0954554A - Display device and its method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device capable of improving resolution and contrast with a mosaical display device using optical wobbling and a method therefor. SOLUTION: A polarization plane rotating element which deflects optical paths is packaged between the mosaical display device 3, such as liquid crystal display, and an observer or a screen to apparently increase pixels by shifting display pixel patterns by using the optical wobbling without increasing the number of the pixels. A condensing optical system 2 consisting of microlens parts 2, such as microlenses, made correspondent to the pixel apertures 3a of the mosaical display device 3 is disposed on the back light side of the mosaical display device. The respective microlens parts 2a converge incident light beams 1 on the respective pixel apertures 3a smaller than the pixel apertures 3a on the display focal plane of the mosaical display device 3. As a result, the display pixel sizes are reduced, by which the pixels are made brighter and the overlaps of the pixels which are the case for the deterioration of the resolution are decreased. The contrast and resolution are thus improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display technique for improving the contrast and resolution of a mosaic display device.

[0002]

2. Description of the Related Art A mosaic display device is, for example, an LCD.
A display device configured by arranging pixels as typified by a (liquid crystal display), in which an observer directly sees the emitted light from the display panel, or the emitted light is projected on a screen ( LCD projector).

In such an LCD, in order to perform interlaced display, the number of pixels in the vertical direction needs to be double that in the case of non-interlaced display. But LCD
However, if the number of pixels is increased in order to increase the resolution, the aperture ratio deteriorates, and the production yield deteriorates due to the occurrence of bright spot defects, resulting in higher costs.

Therefore, the present applicant has filed an earlier application (Japanese Patent Application No.
No. 16955), there is proposed a resolution improving method and device capable of optically increasing the apparent number of pixels without increasing the number of pixels, and further, JP-A-6-324320 and Japanese Patent Application No. 6-324320. Japanese Patent Laid-Open No. 6-159730 proposes an improved technique related to these.

An outline of the principle will be described with reference to FIG.
FIG. 8A shows a pixel array of a color LCD for half-line non-interlaced display. In this example, one set of pixel rows of G, B and R is arrayed at a pitch Pc in the horizontal direction. One line is formed, and this line is arranged in the vertical direction at a pitch Pv so that the pixel pattern is a staggered pattern. When a means for changing the optical path of Pv / 2 in the vertical direction is provided between the LCD and the viewer or the screen, and the optical path is changed in the vertical direction for each field, for example, an odd field is set in accordance with the change of the optical path. And the image information of the even field are displayed on the LCD.
The image information of the odd field and the even field will be displayed in the same pixel on the LCD,
Since the optical path is changed and shifted in the vertical direction, the image position apparently shifts between the odd field and the even field, as shown in FIG. That is, it seems that the number of pixels is doubled in the vertical direction. Such a technique is optical wobbling.

FIG. 9 shows the principle of optical wobbling when a polarization plane rotating element using a ferroelectric liquid crystal (hereinafter, FLC) and a birefringent optical element are used as means for changing the optical path.

The LCD 15 is a TFT (thin film transistor)
Is a mosaic-type display device that transmits light rays from a backlight toward a viewer or a screen to form display light. The display light (emitted light) becomes a linearly polarized wave by the action of the liquid crystal. The birefringent optical element 16 is composed of, for example, a crystal plate, a calcite, a liquid crystal plate, or the like, has a different refractive index depending on the rotation angle of the polarization plane of the incident light, and refracts the normal light and the extraordinary light. The polarization plane rotating element 17 is an optical element also called a π cell, and is arranged between the LCD 15 and the birefringent optical element 16. The polarization plane rotation element 17 is the FLC 17
Glass plates 17b and 17c with transparent electrodes are adhered to both surfaces of a. This glass plate with transparent electrodes 1
A liquid crystal drive voltage is applied from the drive circuit 18 between the transparent electrodes of 7b and 17c, and the polarization plane is rotated and changed for each field, and the polarization planes of the normal light and the extraordinary light of the birefringent optical element 16 are made to match for each field. To be A phase compensation film 17d is provided on the outer surface of the glass plate 17c with a transparent electrode.

Normal light of the birefringent optical element 16 is, for example, vertically polarized light (= polarization plane 90 °), and extraordinary light is horizontally polarized (=
When the polarization plane is 0 °), the polarization plane rotation element 17 rotates the polarization plane to 90 ° and 0 ° for each field. The liquid crystal drive voltage for this purpose is formed by the drive circuit 18. That is, in the drive circuit 18, the amplitude of the frame synchronization signal that is phase-synchronized with the discrimination signal of the odd field and the even field is adjusted to be the liquid crystal drive voltage, which is applied between the transparent electrodes of the polarization plane rotation element 17. As a result, the polarization plane rotation element 17 has a polarization plane of 0 in an odd field, for example.
From 90 ° to 90 °, the polarization plane is 90 ° in the even field.
To 0 ° respectively.

In the prior art as described above, the LCD
The linearly polarized wave from the display surface 15 is used as a polarization plane rotation element 17
Then, the plane of polarization is changed for each field to match the plane of polarization of the normal light and the extraordinary light of the birefringent optical element 16. In this way, the display light beam from the same pixel position of the LCD 1 is refracted by the birefringent optical element 16 with a different refractive index for each field and is incident on the viewer or the screen. As a result, the display light emitted from the same pixel also appears to be emitted from the position shifted by Δx for each field, or is displayed on the screen, and the pixel pattern is optically shifted. When the relational expression at this time is shown, the shift amount Δx is Δx = t * tan θ when the thickness of the birefringent optical element 16 is t. In addition,
θ represents a separation angle, and * represents multiplication. Therefore, this shift amount Δx is 1/2 of the scanning line interval Pv for one field.
If it is set so that the number of pixels of the LCD 1 remains the number of pixels of one field, it is possible to perform interlaced display with the number of pixels apparently doubled. That is, FIG. 10 and FIG. 11 in which full-line interlaced display can be performed without any processing to the video signal are shown in FIG. 10 and FIG. 11 showing an example of electrode division in which pixel shift is effectively performed over the entire screen and its drive. 3 is a voltage timing chart, which is a technique disclosed by the applicant in Japanese Patent Application No. 6-159730.

When an LCD is used as a mosaic display device as described above, its liquid crystal screen usually has an afterimage effect, and the written pixel holds the written state (information) up to the next field. Therefore, the information of the odd field and the even field is simultaneously stored in one screen. In the above, the entire screen is shifted at the same time, so that the field screen that should be shifted and the field screen that should not be shifted are also shifted.
Even when a mosaic display device having such an afterimage effect is used, the effect is actually observed in about half of the screen. However, in order to improve the resolution, it is desirable to shift only the same field of the screen as much as possible in synchronization with the vertical scanning. This prior art is for doing so, in synchronization with vertical scanning,
This is an example of a case where only the same field is shifted as much as possible.

In this prior art, instead of the transparent electrodes for all the screens of the glass plates 17b and 17c with transparent electrodes of the polarization plane rotation element 17 of FIG. 9, the screens are adapted to correspond to a plurality of horizontal scanning lines. The scanning line electrodes 17e-1 to 17e-5 (transparent electrodes) divided into a plurality (five in this example) are provided. Others are the same as the configuration of the polarization plane rotation element of FIG. Then, the scanning line voltage 17e-k between the scanning line electrodes 17e-k (k = 1, 2, ..., 5) and the transparent electrode of the glass plate 17c with the opposite transparent electrode is controlled in synchronization with the vertical scanning of the LCD 15. Then, the plane of polarization of the linearly polarized wave from the pixel of each scanning line is changed from 0 ° to 90 ° or 90 °.
Scan from 0 ° to 0 ° so as to rotate sequentially in the vertical direction.

FIG. 11 shows the scanning line voltage ek at this time.
It is a figure which shows the example of (k = 1, 2, ..., 5). That is, each field section is divided into five, and the scan line voltage E is divided at the timing when the writing of the divided section is started.
k is polarization plane 0 ° to 90 ° or polarization plane 90 ° to 0 °
Change the control voltage to.

In the state shown in FIG. 7, the first scanning line electrode 17e is used.
-1 and the second scanning line electrode 17e-2 are the writing area of the current field, the plane of polarization is 90 °, and the third scanning line electrode 17e-3 and below are the previous field display area. The plane of polarization is 0 °.

Ideally, the scanning line electrodes are provided for the number of scanning lines (for example, 218), but even if the entire screen is shifted, the optical deflection is effective for about half the screen. Instead of dividing into, divide into multiple lines as in the above example (for example, divide the whole into 5)
With the configuration of the transparent electrode described above, it is possible to obtain a sufficient effect while simplifying the configuration.

The effect of the above electrode division will be described with reference to FIGS. 12 and 13 in comparison with other examples. In this example, FIG.
As shown in FIG. 1 to No.
It is assumed that the display is observed through the FLC having 5 electrodes divided into 5.

FIG. 13A shows a state in which half-line non-interlaced display is performed. EVEN (even:
Since the even pixel) and the ODD (odd: odd number) field are overlapped by the same pixel, the vertical resolution is lower than that of the full line interlace. Since the same pixel in the ODD field and the same pixel in the EVEN field are overlaid and displayed, the screen in which the pixels in the same spatial position of the divided block are integrated in the time direction is always recognized, and the vertical resolution is higher than that of the full line interlace. drop down. FIG. 13B shows a state in which full line display is performed by performing optical deflection in which the entire screen is simultaneously shifted in the vertical direction by a half pixel pitch for each EVEN field. In this example, a screen in which the pixels in the original same spatial position of the divided block in the ODD field cycle and the pixels in the same spatial position of the divided block that are half-pixel pitch shifted in the EVEN field cycle are integrated in the time direction is recognized. As a result, although pixels are arranged in the upper part of the screen well, the lower part of the screen is reversed, for example, the ODD field is shifted despite the period for shifting the EVEN field. FIG. 13C shows a state in which the pixel pattern shift is performed for each divided electrode in accordance with the line scanning. Only the divided blocks containing the line being scanned are half-pixel pitch shifted so that the ODD / EVEN field display is well pixelated across the screen.

[0017]

[Problems to be Solved by the Invention] As described above,
The half-line non-interlaced display can be changed to a full-line interlaced display by optical wobbling, and the resolution can be improved to the same level as the full-line double speed display.

However, when the half-line non-interlaced display is changed to the full-line interlaced display by the optical wobbling, the pixel position is shifted every other field cycle, and therefore, the pixel is smaller than that in the full-line display. However, there is a problem in that the contrast is reduced by the amount that is not overwritten. This decrease can be improved by increasing the brightness of the light source incident on the LCD, but the full-line double-speed display is also improved, which is not a good method for maintaining superiority.

The contrast is the ratio of white and black levels, but if both are finite values, the ratio does not change and there is no deterioration. However, compared with perfect black (luminance level 0: inter-pixel mask portion, which affects the recognition of pixel edges), the impression that the pixel luminance is reduced (the total light amount does not change) gives a clear impression. This sense is called contrast here in a broad sense.

Further, when the aperture ratio of the half-line pixel is large, there is a problem that when the half-pixel shift is performed by the optical wobbling, some of the pixels are overlapped with each other, which causes a deterioration in resolution.

As yet another problem, there are two types of normal mosaic display devices, one with a vertical polarization direction and the other with a polarization direction. When the polarization direction is oblique, the optical path shifts in the vertical direction. Can not do it. Further, the vertical one cannot shift the optical path in any direction such as an oblique direction.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a mosaic display device using optical wobbling, which is capable of improving resolution and contrast. A primary object is to provide a method. It is a second object of the present invention to provide a display device and a method capable of freely performing optical path shift due to the optical wobbling in a desired direction regardless of the polarization direction of the mosaic display device.

[0023]

In order to achieve the above-mentioned first object, the display device of the present invention is mounted with an optical element for deflecting an optical path between the mosaic display device and an observer or a screen. In a display device in which a pixel pattern is shifted to apparently increase display pixels, a condensing optical system in which a condensing function portion for each display pixel is arranged is provided on the light source side of the mosaic display device, and the condensing optical system is arranged on each of the display pixels. It is characterized in that the size of the light-collecting pixel by the light-collecting function part is narrowed down to be smaller than the opening area of the display pixel.

In the above, the condensing optical system is configured so that the condensing pixel size is narrowed down by the value of the focal length of each condensing function part or the distance between each condensing function part and each display pixel. , Can be easily realized.

In order to achieve the above first object,
The display method of the present invention is a display method of apparently increasing the number of display pixels by shifting the display pixel pattern by deflecting the optical path of the emitted light of the mosaic display device to the observer or the screen. It is characterized in that the size of the display pixel is narrowed down by condensing on the display pixel to be smaller than the opening area of the display pixel.

In order to achieve the above-mentioned second object, the display device of the present invention is such that, in the display device, the polarized light emitted from the mosaic display device is provided between the mosaic display device and the optical element for deflecting the optical path. On the other hand, a first optical system in which a polarizing plate for once converting the emitted polarized light into a circularly polarized light and a ¼ wavelength phase difference plate are arranged in combination, and a first optical system converted into the circularly polarized light are provided. A second optical system in which a quarter-wave retardation plate and a polarizing plate are arranged in combination so as to convert the emitted light into the optical path shift direction of an optical element that deflects the optical path, is mounted. It is characterized by

In order to achieve the above second object,
The display method of the present invention, in the above display method, when deflecting the optical path of the emitted light from the mosaic display device to the observer or the screen, first, the emitted polarized light of the mosaic display device is once circularly polarized. The output polarized light that has been converted and then converted into the circularly polarized light is converted into an optical path shift direction when the optical path is deflected.

According to the present invention, in the display device and the display method using the optical wobbling that optically increases the number of pixels without increasing the number of pixels of the mosaic display device, the pixel is formed by the condensing optical system such as a microlens. By reducing the size to brighten the pixels and reducing the overlap of pixels which is a factor of resolution deterioration, the contrast and the resolution are improved, and the contrast and the resolution equal to or higher than the full line double speed display are realized.

When the outgoing polarization direction of the mosaic display device does not coincide with the optical path shift direction, it is converted into circular polarization once by the combination of the polarizing plate and the quarter-wave retardation plate, and then quarter-polarized again. Even if the polarization direction of the mosaic pixel display device is diagonal and you want to shift the optical path vertically by converting to the desired polarization direction with the wavelength retardation plate and the polarizing plate, you can also use any direction such as diagonal direction. Also, when it is desired to shift the optical path, the polarization direction can be freely converted to the desired direction, and the optical path can be shifted in the free direction.

[0030]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a diagram showing a schematic configuration for explaining a first embodiment of the present invention. In this embodiment, the mosaic display device 3 (corresponding to the LCD 15 in FIG. 6)
Indication of incident light beam 1 side (backlight side)
In addition, condensing optical system (micro lens, Fresnel lens, etc.)
2 is arranged. The condensing optical system 2 includes a mosaic display device 3
Minute lens portion 2a corresponding to each display pixel opening 3a
Are arranged. This minute lens portion 2a
Means that the incident light beam 1 from the backlight side is narrowed down to a condensing pixel size 1a smaller than the display pixel opening 3a on the display focus surface of the mosaic display device 3, and the outgoing light beam 4 is directed to the observer side or the screen. It is emitted to the side.

FIG. 2B shows an example in which a microlens provided for improving the aperture ratio is used as the condensing optical system 2 to narrow down the condensing pixel size. For the purpose of improving the normal pixel aperture ratio, the objective can be achieved by narrowing down the size to the same size as the display pixel aperture 3a, but in the present embodiment, it is at least smaller than the pixel size of the display pixel aperture 3a (for example, half the pixel size). ). For that purpose, the distance between the microlens 2 and the display focus surface of the mosaic display device 3 may be adjusted, or the focal length of the microlens 2 may be changed.

FIG. 2A shows RG without a color filter.
The microlens 2 for accurately injecting the B beams 1R, 1G, and 1B into the pixels sharing the RGB signals (CF (color filter) -less method) is diverted to narrow down the condensing pixel size. Similar to FIG. 2B, the display pixel opening 3 is formed.
Microlens 2 below the pixel size of a (for example, half)
To narrow down. The means and method therefor are the same as in the case of FIG.

The condensing optical system may be one in which minute Fresnel lenses, minute plane lenses formed by changing the refractive index, or the like are arranged and assembled.

The operation of the present embodiment configured as above will be described. FIG. 3 is a diagram for explaining the operation of this embodiment.

FIG. 3A shows a luminance state in which a half-line non-interlaced display not embodying the present invention is changed to a full-line interlaced display by using optical wobbling. The horizontal axis represents the brightness level and the vertical axis represents the pixel position. As the display signal, a black-and-white repeating horizontal streak pattern for each line is assumed (the same applies to FIGS. 4 and 5).
Since it is a half line, the ODD field has a white level and EV
EN field is at black level (displayed with a little brightness so that it can be seen that it is a pixel part)
Becomes The brightness level 0 part is a mask part between pixels. When the black-and-white repeating signal for each line is a half-line non-interlaced display (see FIG.
It can be seen that it is reproduced compared to (a)). When the opening is formed wider than the mask portion for the purpose of improving brightness, the pixels of the original field and the pixels of the wobbled field appear to partially overlap each other. Therefore, the vertical resolution is halved.

On the other hand, FIG. 3 (b) is a diagram showing the luminance state of the present embodiment in which the size of the condensing pixel is reduced by using the condensing optical system. Since the condensing pixel size is narrowed down and the display pixel size is reduced, there is no overlap between the display pixels, the resolution is improved, the brightness level is improved, and the contrast is improved. Therefore, an image quality with the same resolution and contrast as the full line double speed display of FIG. Considering moving images, the image quality is better than that of full-line double-speed display because it is interlaced by optical wobbling.

In order to further clarify the operation of this embodiment, comparison with various examples will be made below.

FIG. 4 shows the luminance state when the pixels of the half-line non-interlaced display without wobbling are narrowed down by the focusing optical system. FIG. 4A shows a brightness state before the pixel is narrowed down by the focusing optical system, and FIG. 4B shows a brightness state when the focusing pixel size is narrowed down by the focusing optical system. When the display pixel is narrowed down by narrowing the light-collecting pixel size with the light-collecting optical system, the brightness is improved, but the mesh (black) between the pixels is rather conspicuous, and the pixel shortage is emphasized.

FIG. 5 is a diagram showing a luminance state when pixels for full-line double-speed display are narrowed down by a condensing optical system. FIG.
FIG. 5A is a luminance state before the pixel is narrowed down by the condensing optical system, FIG.
(B) shows a brightness state when a condensing optical system is provided for full-line double-speed display and the pixels are narrowed down. In this case, the brightness increases, but the mesh (mask part) between pixels increases,
The higher the contrast, the more noticeable it becomes.

The full-line double-speed display is a full-line double-speed display and uses a frame memory to complicate the circuit.
Since it is expensive and the number of pixels is at least twice the number of half lines, there is a problem of deterioration of production yield. However, as is clear from the above, according to the present embodiment,
A relatively simple configuration using a low-cost display panel, in which optical wobbling is used for half-line non-interlaced display that does not cause a problem of production yield deterioration and the pixels are narrowed down by a condensing optical system while keeping the video signal as it is. It is possible to obtain an image quality equal to or higher than that of full line double speed display.

Next, a second embodiment of the present invention will be shown.

FIG. 6 is a block diagram showing an optical system for converting the polarization direction for explaining the present embodiment, and FIG.
It is a block diagram of an optical wobbling display device using this polarization direction conversion optical system.

The polarization direction conversion optical system 10 used in the present embodiment is a polarizing plate 11 and λ which convert circularly polarized waves in order from the incident side of display light in accordance with the polarization direction of the display light.
A first optical system 10a formed by a combination of a / 4 phase difference plate 12 and a combination of a λ / 4 phase difference plate 13 and a polarizing plate 14 that linearly polarize the circular polarization in an arbitrary direction. A second optical system 10b, which is a filter, is arranged and configured.

Usually, the polarization direction of the LCD has a vertical direction and an oblique direction. In the case of vertically shifting the outgoing light of the vertically polarized light of the LCD, the arrangement shown in FIG. 9 described in the related art may be used as it is, but the outgoing light of the obliquely polarized light from the LCD 15 is polarized. The polarization direction conversion optical system 10 of FIG. 6 is arranged as shown in FIG. 7 in order to convert the wave direction to the vertical direction. That is, LC is provided between the LCD 15 and the polarization plane rotation element 17 of the optical wobbling display device described in FIG.
Polarizing plate 11, λ / 4 retardation plate 12, λ / 4 from the D15 side
The retardation plate 13 and the polarizing plate 14 are arranged in this order. Here, the first optical system 10a shown in FIG. 6 is aligned with the incident polarization direction, and the second optical system 10b is aligned with the desired polarization direction, that is, the direction compatible with the optical path shifting operation of the birefringent optical element 16. To match.

With the above structure, the display light from the LCD 15 passes through the polarizing plate 11 (usually, this polarizing plate 11 can also be used as the one attached to the LCD 15 side), and the light emitted from the polarizing plate 11 is 1 It is converted into circularly polarized light by the / 4 retardation plate 12. Next, a filter for converting circularly polarized waves into linearly polarized waves by the combination of the quarter-wave plate 13 and the polarizing plate 14 can be converted to a desired polarization direction by rotating the plane of linearly polarized waves. Polarizing plate 14 constituting this filter
Is for maintaining the purity of linearly polarized waves.

Since the number of pixels in the horizontal direction can be increased in the present invention, the total number of pixels can be quadrupled. If the present invention is applied to full interlaced NTSC, HDTV display with 1125 vertical scanning lines is also possible. Furthermore, it can be applied to an EVF (electric view finder), a projector, a spectacle-type monitor display, an imaging camera, and the like. As described above, the present invention can be variously applied and modified in accordance with the gist of the invention.

[0048]

As described above, according to the present invention,
Since the display pixels of the mosaic display device using optical wobbling are narrowed down by using a condensing optical system, etc., full line display of interlace is performed without increasing the number of panel pixels, and in addition to improving brightness, contrast , The resolution can be improved. Further, since the number of pixels is not increased, the aperture ratio does not decrease and high-luminance display can be performed. Since the number of pixels is small, high-resolution display can be realized on a low-cost panel.

When the outgoing light of the mosaic display device is converted into circularly polarized light and then linearly polarized again, when the pixel shift is performed in the vertical direction by optical wobbling, the mosaic pixel display device is obtained. If the polarization direction of the mosaic pixel display device is not the same as the polarization direction of the mosaic pixel display device, such as when the polarization direction of the You can freely convert to the desired direction.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a first embodiment of the present invention.

2A and 2B are diagrams showing a configuration example of a condensing optical system in the first embodiment.

FIG. 3 is a diagram explaining an effect in the first embodiment.

FIG. 4 is a diagram showing a state of half-line non-interlaced display that does not use optical wobbling as a comparative example for explaining the effect of the first embodiment.

FIG. 5 is a diagram showing a state of full line double speed display as a comparative example for explaining the effect in the first embodiment.

FIG. 6 is a diagram illustrating a configuration of a polarization direction conversion optical system according to a second embodiment of the present invention.

FIG. 7 is a diagram showing a configuration of an optical wobbling display device showing an arrangement of a second embodiment of the present invention.

8A and 8B are diagrams showing a pixel array of a conventional mosaic display device with improved resolution.

FIG. 9 is a diagram illustrating the principle of conventional optical wobbling.

FIG. 10 is a diagram showing a configuration example of a line electrode in conventional optical wobbling.

FIG. 11 is a diagram illustrating an example of controlling a line electrode in conventional optical wobbling.

FIG. 12 is a view for explaining the action of conventional optical wobbling (No. 1)

13 (a), (b), and (c) are views for explaining the action in conventional optical wobbling (part 2).

[Explanation of symbols]

 1 ... Incident light beam 1a ... Condensing pixel size 2 ... Condensing optical system 2a ... Micro lens part 3 ... Mosaic display device (display focus surface) 3a ... Display pixel aperture 4 ... Emitting light beam 10 ... Polarization direction conversion Optical system 10a ... 1st optical system 10b ... 2nd optical system 11 ... Polarizing plate 12 ... λ / 4 phase difference plate 13 ... λ / 4 phase difference plate 14 ... Polarizing plate 15 ... LCD 16 ... Birefringent optical element 17 … Polarization plane rotation element (FLC) 18… Drive circuit

Claims (5)

[Claims] 1. A display device for mounting an optical element for deflecting an optical path between a mosaic display device and an observer or a screen to shift a display pixel pattern to apparently increase display pixels, wherein light is condensed for each display pixel. A condensing optical system in which functional portions are arranged is arranged on the light source side of the mosaic display device so that the condensing pixel size by the condensing functional portion on each display pixel is narrowed down to be smaller than the opening area of the display pixel. A display device characterized by being arranged. 2. The condensing optical system narrows down the condensing pixel size by the value of the focal length of each condensing function part or the distance between each condensing function part and each display pixel. 1. The display device according to 1. 3. A polarizing plate for converting the output polarized light of the mosaic display device into circularly polarized light once between the mosaic display device and the optical element for deflecting the optical path, and a quarter wavelength. A first optical system arranged by combining a retardation plate, and the emitted light of the first optical system converted into the circularly polarized wave,
And a second optical system in which a quarter-wave retardation plate and a polarizing plate are arranged in combination so as to convert the emitted light into an optical path shift direction of an optical element that deflects the optical path. The display device according to claim 1. 4. A display method for deflecting an optical path of emitted light of a mosaic display device to an observer or a screen to shift a display pixel pattern to apparently increase the number of display pixels, wherein the incident light is displayed for each display pixel. A display method, characterized in that the display pixel size is narrowed down by condensing light in a size smaller than the opening area of the display pixel. 5. When deflecting the optical path of the emitted light from the mosaic display device to the observer or the screen, first, the emitted polarized light of the mosaic display device is once converted into circularly polarized light, and then, 5. The display method according to claim 4, wherein outgoing polarized light converted into circular polarized light is converted into an optical path shift direction when the optical path is deflected.