JP2010078761A - Display device and electronic equipment - Google Patents

Abstract

A display device capable of suppressing breakage of a liquid crystal control element is provided.
The display device is provided on a flat surface, a liquid crystal control element that adjusts the amount of light emitted from a light source, and a curved display that displays an image by light emitted from the liquid crystal control element. A surface 1b and a phosphor layer 5 provided along a curved display surface 1b are provided.
[Selection] Figure 1

Description

  The present invention relates to a display device and an electronic apparatus.

Conventionally, a display device including a pair of substrates and a liquid crystal layer provided between the pair of substrates is known (for example, Patent Document 1). Patent Document 1 discloses a display device including a light adjustment unit including a pair of substrates and a liquid crystal layer provided between the pair of substrates. The display device disclosed in Patent Document 1 is configured to adjust the amount of light incident from the light source and irradiate the display surface by driving a liquid crystal by applying a voltage between the substrates of the light adjustment unit. Yes. In the display device of Patent Document 1, the light adjustment unit is deformed into a curved surface so that the substrate of the light adjustment unit formed in a flat surface is bent, and the light adjustment unit is deformed into a curved surface. It is configured to be arranged in the apparatus main body in a state.
JP 2003-337549 A

However, the display device described in Patent Document 1 is configured to display an image in a state where the light adjustment unit is deformed into a curved surface, and the substrate of the light adjustment unit is mounted on the device main body in a state where the substrate is deformed into a curved surface. Be placed. For this reason, since the stress caused by deformation is always applied to the substrate of the light adjusting unit, there is a problem that the substrate may be damaged due to the stress. Furthermore, since the light adjustment part formed in a flat surface is deformed into a curved surface, there is a limit to the curvature and shape of the curved surface, and various curved and bent shapes such as a large curvature and a hemisphere are used. Has the problem of being difficult.

The present invention has been made in order to solve the above-described problems, and one object of the present invention is to prevent the light adjusting unit from being damaged, and to have a shape with a large curvature or a hemisphere. It is to provide display devices and electronic devices having various curved shapes such as shapes.

A display device according to a first aspect of the present invention is provided on a flat surface, and includes a light adjustment unit that adjusts the amount of light emitted from a light source, and a curved surface or a bend that displays an image by light emitted from the light adjustment unit. A planar display surface and a light emitting layer provided along a curved or bent display surface.

In the display device according to the first aspect, as described above, the light adjustment unit having a flat surface shape is provided, and the light emitter layer is provided along the display surface formed in a curved surface shape or a bent surface shape. Without changing the adjustment portion into a curved surface or a bent surface, a light emitting layer that performs display by light emission can be provided in a curved surface or a bent surface. Thereby, since the stress by deformation | transformation does not generate | occur | produce in the light adjustment part formed in flat surface shape, it can suppress that a light adjustment part is damaged. In addition, since the light is adjusted from the flat surface to the curved or bent display surface, the light is supplied uniformly regardless of the curvature and shape of the display surface. be able to. That is, it is possible to easily perform display on a display surface formed in various curved shapes such as a shape having a large curvature and a hemisphere, and a bent shape. In addition, since the light emitting layer provided on the curved or curved display surface emits light, a higher brightness image can be displayed as compared with the case where display is performed using a color filter that absorbs part of the light. Can do.

In the display device according to the first aspect, it is preferable that the display surface is formed in a curved surface protruding in a convex shape in the video display direction. If comprised in this way, an image | video can be easily displayed on a convex and curved display surface by arrange | positioning a light-emitting body layer along a display surface.

In the display device according to the first aspect, preferably, the display surface provided with the light emitter layer is configured to emit light by the light emitted from the light adjusting unit. With this configuration, for example, unlike a conventional liquid crystal display device that performs display using a color filter, there is no liquid crystal field-of-view characteristic, and thus a display device with a wide viewing angle can be obtained.

In the display device according to the first aspect, it is preferable that the display device further includes a base material having a curved surface, and the light emitter layer is provided along the curved surface of the base material. If comprised in this way, the curved surface which adjusted the light adjustment part to the display surface by arrange | positioning combining the base material which has the curved-surface display surface provided with the light-emitting body layer, and the flat surface-shaped light adjustment part. Unlike the case of deforming into a shape, a display device can be easily formed.

In the display device according to the first aspect, preferably, the light adjusting unit includes a pair of substrates provided in a flat surface shape and a liquid crystal layer disposed between the pair of substrates. If configured in this way,
A liquid crystal control element that adjusts the amount of light transmitted by driving the liquid crystal with an electric field generated between the substrates can be used as the light adjusting unit.

In the display device according to the first aspect described above, preferably, the light adjustment unit is provided with a plurality of pixels, and is arranged so that the display surface overlaps the pixel portion of the light adjustment unit in a plan view. On the display surface, a light emitting layer is provided at a position corresponding to each pixel of the light adjustment unit so as to emit light in a color corresponding to each pixel. If comprised in this way, since the light from each pixel of a light adjustment part is each irradiated to a corresponding light-emitting body layer, an image | video can be reliably displayed on a curved-surface-like or curved surface display surface. In addition, since the light emitting layer is provided so as to correspond to the position of each pixel, light can be emitted in a color corresponding to each pixel. Therefore, a high-resolution video can be displayed.

In this case, preferably, a light emitting layer that emits light of any one of red, green, and blue is provided on the display surface for each position corresponding to each pixel. If comprised in this way, the display by the additive color mixture of R (red) G (green) and B (blue) can be easily performed using a light-emitting body layer.

In the display device according to the first aspect, preferably, the light emitter layer may be a phosphor.

An electronic apparatus according to a second aspect of the present invention includes a display device having the above-described configuration. If comprised in this way, the electronic device containing the display apparatus which can suppress that a light adjustment part will be damaged can be obtained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing a display device according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of a display device according to an exemplary embodiment. FIG. 3 is an enlarged cross-sectional view of a display device according to an embodiment of the present invention. FIG. 4 is a plan view of a display device according to an embodiment of the present invention. With reference to FIGS. 1-4, the structure of the display apparatus 100 by one Embodiment of this invention is demonstrated.

A display device 100 according to an embodiment of the present invention includes a substrate 1 and a liquid crystal control element 2 as shown in FIGS. 1 and 2. The liquid crystal control element 2 includes a pair of flat surface substrates 2b and 2c provided so as to sandwich the liquid crystal layer 2a (see FIG. 3), and a flat surface polarizing plate disposed so as to sandwich the substrates 2b and 2c. 2d and 2e, and is formed in a flat surface as a whole. The substrate 1 is made of glass or transparent resin. The surface 1a on the side facing the polarizing plate 2e of the substrate 1 is formed in a flat surface, and the surface (display surface) 1b opposite to the surface 1a is formed in a curved surface protruding in the arrow Z direction. Has been. The display surface 1b formed on the curved surface of the substrate 1 has a function of displaying an image. The liquid crystal control element 2 is an example of the “light adjusting unit” in the present invention.

As shown in FIG. 3, a liquid crystal layer 2a is sealed between the substrates 2b and 2c. Also,
A plurality of pixels 3 are formed between the substrates 2b and 2c, and each pixel 3 includes a pixel electrode 3a and a common electrode 3b. Specifically, a pixel electrode 3a is formed for each pixel 3 on the substrate 2b, and a common electrode (counter electrode) 3b is formed on the substrate 2c at a position facing the pixel electrode 3a. Yes. The substrate 2c is provided with a light shielding film (black matrix) 3c for guiding light for each pixel 3 with respect to the display surface 1b, but is not provided with a color filter. A backlight 4 is disposed at a position facing the polarizing plate 2d. The liquid crystal molecules of the liquid crystal layer 2a are driven by the electric field applied between the pixel electrode 3a and the common electrode 3b of the substrates 2b and 2c, and the amount of light from the backlight 4 is between the polarizing plate 2d and the substrates 2b and 2c. The liquid crystal layer 2a and the polarizing plate 2e are adjusted so that the substrate 1 is irradiated with the liquid crystal layer 2a. Moreover, as light irradiated to the base material 1 side from the backlight 4, directivity is strong and it is preferable that it is parallel light. The backlight 4 is
It is an example of the “light source” of the present invention.

Further, as shown in FIGS. 3 and 4, the plurality of pixels 3 are formed in a matrix shape in plan view. Moreover, the phosphor layer 5 is formed on the display surface 1b of the substrate 1 by coating along the curved surface shape of the display surface 1b. Specifically, the liquid crystal control element 2 is formed on the surface of the display surface 1b.
The phosphor layers 5 corresponding to red, green and blue are alternately formed in this order for each region corresponding to each of the pixels 3. Each phosphor layer 5 is arranged so that the length along the display surface 1b increases from the central portion of the display surface 1b of the substrate 1 toward the end portion.
As shown in FIG. 4, each phosphor layer 5 is configured to have the same surface area in plan view. That is, along the display surface 1b of the phosphor layer 5 formed on the end side of the display surface 1b rather than the length L1 along the display surface 1b of the phosphor layer 5 formed in the central portion of the display surface 1b. The length L2 is configured to be larger. In addition, the phosphor layer 5 is formed for each surface corresponding to each pixel 3 on the display surface 1b in a plan view, so that the light irradiated from each pixel 3 of the liquid crystal control element 2 can be used. It is configured to emit surface light. The phosphor layer 5
Is an example of the “light emitter layer” in the present invention.

As shown in FIG. 5, the display device 100 according to the embodiment of the present invention includes a wristwatch type electronic device 2.
00 can be used. Specifically, in the wristwatch-type electronic device 200, the display device 100 according to an embodiment of the present invention is used on an upwardly convex curved display screen 200a. Thereby, while being able to display a high-intensity image compared with the conventional clock display part,
TV image display can also be made possible, and a watch-type TV can be realized.

In the present embodiment, as described above, the flat liquid crystal control element 2 is provided, and the phosphor layer 5 is provided along the curved display surface 1b, whereby the liquid crystal control element 2 is curved. The phosphor layer 5 that performs display by light emission can be provided in a curved shape without being deformed. As a result, the liquid crystal control element 2 formed in a flat surface does not generate stress due to deformation, and therefore it is possible to prevent the substrates 2b and 2c of the liquid crystal control element 2 from being damaged. In addition, since the light is supplied from the flat liquid crystal control element 2 to the curved display surface 1b, the light is uniformly emitted regardless of the curvature and shape of the display surface 1b. Can be supplied. That is, even when the display surface 1b is formed into various curved shapes such as a large curvature and a hemisphere, and curved shapes other than the curved shape described in the present embodiment, the display can be easily performed. . Further, since the phosphor layer 5 provided on the curved display surface 1b emits light, it is possible to display an image with higher luminance than in the case where display is performed using a color filter that absorbs part of the light. .

Further, in the present embodiment, the display surface 1b is formed into a curved surface protruding in a convex shape in the direction of the arrow Z of the image, so that the phosphor layer 5 is disposed along the display surface 1b, thereby forming a convex shape. An image can be easily displayed from the curved display surface 1b.

Further, in the present embodiment, the display surface 1b provided with the phosphor layer 5 is configured to emit light by the light emitted from the liquid crystal control element 2, so that, for example, a conventional display that uses a color filter is performed. Unlike a liquid crystal display device, there is no liquid crystal field of view characteristics, so that a display device 100 with a wide viewing angle can be obtained.

In the present embodiment, the base material 1 including the display surface 1b formed in a curved surface is provided, and the phosphor layer 5 is provided along the display surface 1b formed in the curved surface shape of the base material 1 to thereby obtain fluorescence. By arranging the base material 1 having the curved display surface 1b provided with the body layer 5 and the flat liquid crystal control element 2 in combination, the liquid crystal control element 2 is curved to match the display surface 1b. Unlike the case of deforming, the display device 100 can be easily formed.

Further, in the present embodiment, the display surface 1b of the base material 1 is disposed so as to overlap the pixel 3 portion of the liquid crystal control element 2 in plan view, and each pixel of the liquid crystal control element 2 is disposed on the display surface 1b. By providing the phosphor layers 5 that emit light in the colors corresponding to the positions corresponding to 3, the light from each pixel 3 of the liquid crystal control element 2 is irradiated to the corresponding phosphor layers 5, so An image can be reliably displayed on the display surface 1b. In addition, since the phosphor layer 5 is provided so as to correspond to the position of each pixel 3, it is possible to emit light in a color corresponding to each pixel 3. Therefore, a high-resolution video can be displayed.

Further, in the present embodiment, the phosphor layer 5 is provided on the display surface 1b by providing the phosphor layer 5 that emits red, green, or blue light at each position corresponding to each pixel 3. Can be easily displayed by additive color mixing of R (red) G (green) and B (blue).

The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

For example, in the above-described embodiment, an example in which the display surface 1b has a curved surface shape protruding in the direction of the arrow Z has been described. However, the present invention is not limited thereto, and the display surface 1b has a curved surface shape having two or more protruding portions ( Curved shape having continuous irregularities). Further, the display surface 1b may have a bent surface shape such as a trapezoidal shape, for example. That is, it is sufficient that the concavo-convex shape is such that the concavo-convex shape does not cause a shadow on the substrate. In addition, as shown in FIG. 6, the present invention is also applicable when the phosphor layer 5 is applied to the surface of the base material 10 having a hemispherical shape. in this case,
A phosphor layer 5 of a different color (RGB or the like) may be applied on the surface of the hemispherical surface of the substrate 10 so as to correspond to each pixel 3 of the liquid crystal control element 2.

Moreover, in the said embodiment, while the surface 1a on the side which opposes the polarizing plate 2e of the base material 1 is formed in flat surface shape, the surface (display surface) 1b on the opposite side to the surface 1a is the arrow Z direction. The display surface 1b formed in a curved shape projecting to the curved surface of the substrate 1 has an example of a function of displaying an image. However, the present invention is not limited thereto, and the polarization of the substrate 1 is not limited thereto. The surface 1a on the side facing the plate 2e may be formed in a curved shape. In this case, the surface 1b opposite to the surface 1a may be the display surface.
The surface 1a may be a display surface.

In the above embodiment, the display device 100 includes the liquid crystal control element 2 configured to generate a vertical electric field by providing the pixel electrode 3a on the substrate 2b side and providing the common electrode 3b on the substrate 2c side.
However, the present invention is not limited to this. For example, the lateral electric field is generated by providing the pixel electrode 3a and the common electrode 3b on one of the substrates 2b and 2c, such as the IPS mode and the FFS mode. You may use the liquid crystal control element of the structure to generate | occur | produce as a light adjustment part of this invention.

Moreover, although the example which uses the liquid-crystal control element 2 as an example of the light adjustment part was shown in the said embodiment, this invention is not restricted to this, As long as it has a function as a shutter with respect to the light irradiated from a light source. A mechanism other than the liquid crystal control element 2 may be used.

In the above embodiment, the phosphor layer 5 that emits red, green, and blue light is applied to the display surface 1b by coating. However, the present invention is not limited to this, and colors other than red, green, and blue are used. A phosphor layer that emits light may be formed. Moreover, you may form the fluorescent substance layer 5 in the display surface 1b by methods other than application | coating.

In the above embodiment, the phosphor layer 5 is provided on the display surface 1b as the phosphor layer. However, the present invention is not limited to this, and a layer made of a phosphor other than the phosphor may be provided.

Moreover, in the said embodiment, although the example which forms the fluorescent substance layer 5 so that one color respond | corresponds to each pixel 3 on the display surface 1b was shown, this invention is not limited to this, The several pixel 3 is shown. 1
The phosphor layer 5 may be formed so that two colors correspond to each other.

Moreover, in the said embodiment, by forming the fluorescent substance layer 5 so that the length along the display surface 1b may become large as it goes to the edge part from the center part of the display surface 1b,
Each example is shown to have the same surface area in plan view, but the present invention is not limited to this, and the phosphor layers 5 are all equal in length along the display surface 1b. You may form in the display surface 1b. In this case, since the formed phosphor layers 5 have the same surface area in the central portion and the end portion of the display surface 1b, there is no difference in luminance.

1 is a perspective view of a display device according to an embodiment of the present invention. 1 is an exploded perspective view of a display device according to an embodiment of the present invention. It is sectional drawing of the display apparatus by one Embodiment of this invention. It is a top view of the display apparatus by one Embodiment of this invention. It is a figure for demonstrating the electronic device provided with the display apparatus by one Embodiment of this invention. It is a perspective view for demonstrating the modification of the display apparatus by one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base material 1b Display surface 2 Liquid crystal control element (light adjustment part)
2a liquid crystal layer 2b substrate 2c substrate 3 pixel 5 phosphor layer (light emitting layer)
100 Display Device 200 Wristwatch Type Electronic Device

Claims (9)

A light adjustment unit that is provided in a flat surface and adjusts the amount of light emitted from the light source;
A curved or curved display surface for displaying an image by light emitted from the light adjusting unit;
And a light emitting layer provided along the curved or bent display surface. The display device according to claim 1, wherein the display surface is configured in a curved surface protruding in a convex shape in a video display direction. The display device according to claim 1, wherein the display surface provided with the light emitting layer is configured to emit light by light emitted from the light adjustment unit. It further comprises a base material having a curved surface.
The said light-emitting body layer is provided along the surface formed in the curved surface shape of the said base material.
The display apparatus of any one of -3. The display device according to claim 1, wherein the light adjusting unit includes a pair of substrates provided in a flat surface shape and a liquid crystal layer disposed between the pair of substrates. The light adjustment unit is provided with a plurality of pixels,
As viewed in a plan view, the display surface is disposed so as to overlap the pixel portion of the light adjustment unit, and the display surface has a position corresponding to each pixel of the light adjustment unit. The display device according to claim 1, wherein the light emitting layer is provided so as to emit light in a color corresponding to a pixel. The display device according to claim 6, wherein the light emitting layer that emits light of any one of red, green, and blue is provided on the display surface at each position corresponding to each pixel.   The display device according to claim 1, wherein the phosphor layer is a phosphor.   The electronic device provided with the display apparatus of any one of Claims 1-8.

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