JP2012128191A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device of a parallax barrier type or lens array type using a light guide plate, which can make reflection scattered light at individual reflection scattering parts different colors.SOLUTION: A display device 10 includes a light guide plate 11 and a light source 12 for causing light to be incident upon the light guide plate 11 from an end face 11c thereof. The light guide plate 11 is provided with plural reflection scattering parts 15 for causing the incident light from the light source 12 to be reflected and scattered to the surface side of the light guide plate 11.

Description

  The present invention relates to a display device used for a display or the like, and more particularly to a display device that realizes a stereoscopically visible image display.

  As a stereoscopic display method for displaying an image stereoscopically with the naked eye, a method using parallax such as a parallax barrier method or a lens array method is known (for example, see Patent Document 1). In the parallax barrier method, a mask in which light-shielding portions and openings are alternately arranged at a constant repetition pitch (parallax barrier) is used, and images for each of a plurality of viewpoints are divided behind the masks and arranged at the repetition pitch. An image (hereinafter also referred to as a divided image) is arranged. In this method, this configuration makes it possible to see different images for each viewpoint using parallax. In the lens array method, a lens array (lenticular lens) in which minute lenses are arranged at a constant repetition pitch is used instead of a mask, but different images (divided images) can be seen for each viewpoint using parallax. This is the same as the parallax barrier method.

  The divided images are usually printed and displayed on a sheet (or plate) such as paper or displayed on a liquid crystal display screen. There is also known a method in which a light scattering plate is provided with a reflection / scattering portion made of irregularities formed by cutting, laser processing, molding or the like. In this method, light from a light source such as an LED propagates through a light guide plate and is reflected and scattered by a reflection / scattering unit, and a pattern formed by the reflected and scattered light is displayed as an image. By combining such a light guide plate with a mask or a lens array, it is possible to construct a parallax barrier type or lens array type display device using the light guide plate.

JP 2003-295117 A

  However, in the display device using the above-described conventional light guide plate, the reflected / scattered light at each of the reflection / scattering portions reflects the color of the light source as it is, so that the colors of the respective reflection / scattering portions cannot be made different colors. For example, it is possible to use a white light source as the light source and install a color filter in front of the light guide plate to partially color the light reflected and scattered from the reflection / scattering part into a specific color. Is formed on the bottom surface of the light guide plate, and depending on the viewing angle due to the effect of the thickness of the light guide plate, the intended color may not be displayed due to a positional shift between the reflection / scattering portion and the color filter. For the same reason, it has also been impossible to display images with partially different colors in a stereoscopic manner using the parallax barrier method or the lens array method.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to enable the reflected / scattered light in each of the reflected / scattering portions to have a different color in a display device using a light guide plate.

The present invention provides the following configuration in order to solve the above-described problems.
The present invention includes a light guide plate and a light source that makes light incident on the light guide plate from its end face, and a reflection / scattering portion that reflects and scatters incident light from the light source toward the light guide plate surface side on the surface of the light guide plate. A display that is formed in a plurality and has a colored light transmitting portion on the surface side of the light guide plate, and displays a specific pattern formed by light including at least light that is reflected and scattered by the reflection / scattering portion and transmitted through the colored light transmitting portion. Providing equipment.
On the surface side of the light guide plate, the colored translucent portions 1 or more colored with a plurality of specific colors, respectively, can be provided.
It is preferable that the reflection / scattering part has a reflection surface that reflects incident light from the light source to the light guide plate surface side.
The reflection / scattering part is preferably a notch formed on the surface side of the light guide plate.
The reflection surface is preferably inclined at an inclination angle of 40 to 60 degrees toward the light source with respect to the surface of the light guide plate.
In the display device of the present invention, a mask or a lens array for forming a parallax barrier can be provided on a further surface side of the colored light transmitting portion provided on the surface side of the light guide plate.
The mask preferably has a configuration in which strip-shaped light-shielding portions and openings are arranged alternately along a specific direction.
The specific plural colors are preferably red, green and blue.

  ADVANTAGE OF THE INVENTION According to this invention, in the display apparatus using a light-guide plate, in the display apparatus using a light-guide plate, the reflected scattered light in each reflection / scattering part can be made into a different color. In particular, by using a parallax barrier system or a lens array system, images with partially different colors can be displayed in a stereoscopic manner.

1 is an external perspective view showing a display device according to an embodiment of the present invention. It is a longitudinal cross-sectional view of the display apparatus of FIG. It is an expanded sectional view of the color filter vicinity in FIG. It is sectional drawing which shows an example of the color filter (film with a colored layer) of the structure which formed the colored translucent part by printing on the single side | surface of the base film. It is a top view explaining the relationship between the colored translucent part of a color filter, and the reflection scattering part (dot-shaped recessed part) of a light-guide plate. It is a longitudinal cross-sectional view explaining the display apparatus of the structure which employ | adopted the light-guide plate which formed the reflective scattering part (dot-shaped recessed part) in the back surface. It is a partial cross section figure showing other examples of a display. It is a partial sectional view showing other examples of a display. It is a longitudinal cross-sectional view which shows an example of the display apparatus to which the color filter of the structure which arranged the colored translucent part of several color type regularly was applied. It is a top view which shows the example of planar arrangement | positioning of a reflection scattering part (dot-shaped recessed part). It is a top view which shows the other example of planar arrangement | positioning of a reflection scattering part (dot-shaped recessed part). It is a top view which shows the further another example of planar arrangement | positioning of a reflection-scattering part (dot-shaped recessed part). It is a longitudinal cross-sectional view explaining an example of a lens array type display device.

Hereinafter, a display device according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1 and FIG. 2, a display device 10 according to an embodiment of the present invention is a parallax barrier display device using a light guide plate 11, and light is applied to the light guide plate 11 and the light guide plate 11. Light source 12, a color filter 20 provided so as to overlap the surface 11 a of the light guide plate 11, and a mask 32 that forms a parallax barrier on the opposite side of the light guide plate 11 through the color filter 20. It comprises.
The light source 12 is installed so that light can enter the light guide plate 11 from one end surface 11 c on the outer periphery of the light guide plate 11.
The display device 10 in the illustrated example further includes a spacer formed of a transparent plate denoted by reference numeral 40 between the mask 32 and the color filter 20, and the spacer 40 superimposed on the surface side of the color filter 20 includes: The masks 32 are stacked so as to overlap each other.

The light guide plate 11 is formed with a reflection / scattering portion 15 that is an unevenness (concave portion and / or convex portion) that reflects and scatters incident light incident from the light source 12 and emits the light toward the mask 32 from the light guide plate surface 11a. ing.
The display device 10 reflects and scatters incident light from the light source 12 by the reflection / scattering unit 15, and outputs light (reflected scattered light) from the light guide plate 11 to the mask 21 side (surface side of the light guide plate 11). Is displayed in a stereoscopic view from the surface side of the mask 32 which is the observer side (upper side in FIGS. 1 to 3. In detail, the surface side of the film 30 with a mask to be described later, hereinafter also referred to as the apparatus surface side).

As shown in FIG. 3, specifically, the mask 32 is formed by arranging a plurality of light shielding portions 32a on one side of a transparent base film 31 through slit-shaped openings 32b (portions where there is no light shielding portions 32a). The light shielding portion 32a and the opening portion 32b are alternately arranged in a stripe shape (or a strip shape). The light shielding part 32a is formed on one surface of the transparent base film 31 by printing light shielding ink, metal vapor deposition, or the like.
Specifically, the display device 10 of the illustrated example has a film 30 with a mask in which a mask 32 is formed on one surface of a base film 31 on the surface side of the spacer 40 (the side opposite to the light guide plate 11. The mask 32 is laminated in the direction toward the light guide plate 11 side.

  In addition, as a display device, instead of the spacer 40, for example, the entire periphery or a plurality of locations of the outer periphery of the film 30 with the mask is supported by a support member with respect to the light guide plate 11, and the spacer between the mask 32 and the color filter 20 is supported. This portion may be used as a gap.

  The mask 32 is not limited to a striped configuration in which strip-shaped light-shielding portions 32a and slit-shaped openings 32b are alternately arranged, and a configuration in which hole-shaped openings and light-shielding portions are alternately arranged is also possible. It is.

The light guide plate 11 of the display device 10 illustrated in FIG. 1 has a rectangular plate shape. The light sources 12 are provided at a plurality of locations in the longitudinal direction of the elongated case 13 that extends along one of the four end surfaces (indicated by reference numeral 11c; hereinafter also referred to as an incident end surface) of the outer periphery of the light guide plate 11. Light can be incident on the light guide plate 11 from the opening of the 13 light guide plate 11 side.
In the illustrated example, the light source 12 is a light emitting diode, and these light emitting diodes are turned on by the power supplied from the power supply device 14. Further, in each light emitting diode, the optical axes of the emitted light are aligned in parallel with each other so that the incident light on the light guide plate 11 is directed from the incident end face 11c toward the end opposite to the incident end face 11c.

The light source is not limited to the light emitting diode, and for example, a fluorescent lamp, a cold cathode tube, an incandescent lamp, and the like can be used.
In addition, the light guide plate 11 may be configured to have an end surface for allowing light emitted from the light source 12 to enter the outer periphery thereof, and is not limited to a rectangular shape as described above, and the shape thereof is not particularly limited. .

The light guide plate 11 is formed in a transparent rectangular plate shape using a synthetic resin material such as acrylic resin, polycarbonate resin, silicone resin, or cyclopolyolefin resin. It is preferable that the light guide plate 11 has such a light transmittance that it can be seen through the background. Therefore, it is preferable to apply acrylic resin to the light guide plate 11 in consideration of light transmittance, workability, and the like.
In the present invention, the term “transparent” means that the light transmission is such that the reflected light from the reflection / scattering portion is visible. This definition is commonly used in the present invention.

  As shown in FIGS. 1 to 3, the light guide plate 11 includes a light guide plate as a reflection / scattering portion 15 that reflects and scatters incident light from the light source 12 incident from the incident end surface 11c toward the surface 11a and emits the light from the surface 11a. A plurality of dot-like recesses 16, which are notched recesses that are recessed from the front surface 11 a to the back surface 11 b side, are formed.

  As shown in FIG. 3, the dot-shaped recess 16 is specifically a V-shaped notch in a cross-sectional view, and is disposed forward and backward toward the incident end surface 11 c and is on the front side (incident incident) of the two surfaces facing each other. The surface on the side of the end surface 11c is a reflecting surface 16a that reflects (also scatters) incident light incident on the light guide plate 11 from the light source 12 to the light guide plate surface 11a side and emits the light from the light guide plate surface 11a. The reflection surface 16a efficiently reflects the incident light from the light source 12 toward the light guide plate surface 11a side with high reflection efficiency. However, the reflection surface 16a also causes the incident light to scatter, and the reflection / scattering according to the present invention. It functions as a reflection / scattering surface of the part.

  The dot-shaped recess 16 is recessed with a height dimension γ1 smaller than the thickness T of the light guide plate 11 from the front surface 11a to the back surface 11b of the light guide plate 11 and having an inner space inside. The dot-shaped recess 16 reflects and scatters the incident light from the light source 12 to the light guide plate surface 11a side by the reflection surface 16a due to the refractive index difference between the air inside and the light guide plate 11.

  The reflecting surface 16a of the dot-shaped recess 16 is a plane that is inclined so as to approach the incident end surface 11c toward the light guide plate rear surface 11b side with respect to the surface (front surface 11a) of the light guide plate 11 where the dot-shaped recess 16 opens. It has become. The inclination angle α1 of the reflecting surface 16a of the dot-shaped recess 16 with respect to the light guide plate surface 11a (acute angle with respect to the light guide plate surface 11a; the inclination angle with respect to the portion located on the front side from the reflecting surface 16a of the light guide plate surface 11a) is, for example, 40 degrees or more. It is 60 degrees or less. Thereby, high reflection efficiency can be secured on the reflection surface 16a of the dot-shaped recess 16, and the visibility of reflected light can be improved. Further, it is more preferable that the inclination angle α1 is not less than 45 degrees and not more than 55 degrees.

  The reflecting surface 16a is a smooth flat surface. This also contributes to the improvement of the light reflection efficiency on the reflecting surface 16a.

  With the above-described dot-shaped recess 16, light can be reflected efficiently even with a small area in plan view (the formation area occupying the light guide plate surface 11a is small), so that a brighter image is displayed even with a fine expression. It becomes possible.

The reflection / scattering unit 15 is formed at a plurality of locations on the light guide plate surface 11a and displays a specific pattern. In this example, the reflection / scattering unit 15 displays a divided image for each of a plurality of viewpoints on the apparatus surface side by an array pattern.
In the display device 10, an image that is, for example, any one of a character, a symbol, a figure, a pattern, or a plurality of combinations selected from these is arranged on the viewer side according to the arrangement pattern of the reflection / scattering unit 15. Display is possible in a stereoscopic view from the front side of the device.

The image display by the reflected / scattered light from the reflected / scattering portion 15 is transmitted through the colored light-transmitting portion 21 provided in the layered color filter 20 covering the light guide plate surface 11a, passes through the opening portion 32b of the mask 32, and is on the device surface side. This is realized by the reflected and scattered light emitted to.
As shown in FIG. 3, the color filter 20 has a colored light transmitting portion 21 (filter body) at a position corresponding to the reflection / scattering portion 15 of the light guide plate 11. The color filter 20 functions to convert the reflected scattered light that has passed through the colored light transmitting portion 21 into colored light that is colored in any color such as red, green, and blue by the wavelength selectivity of the colored light transmitting portion 21. Fulfill.

As the light source 12 of the display device 10, one that outputs (emits) white light can be suitably used, but is not limited thereto, and the color of the emitted light from the light source 12 may be, for example, blue or red. .
In the display device 10 described here, the colors of light emitted from a plurality of light emitting diodes provided as the light source 12 are aligned with each other. Here, a light emitting diode that outputs (emits) white light is used.
In the display device 10, the incident light incident on the light guide plate 11 from the light source 12 is reflected and scattered by the reflection / scattering unit 15 through the colored light-transmitting unit 21 of the color filter 20. The light colored by the light part 21 can be emitted to the apparatus surface side through the opening part 32 b of the mask 32.

As shown in FIG. 3, the color filter 20 of the display device 10 of this example includes a plurality of colored transparent portions 21 corresponding to the reflection / scattering portions 15 of the light guide plate 11 at a plurality of locations on the film-like transparent base portion 22. It is the structure formed in the shape. The color filter 20 is entirely formed in a film shape.
As the colored translucent portion 21, for example, a resin layer formed using a translucent colored resin material mixed with a coloring material such as a dye or a pigment by a known dyeing method, pigment dispersion method, or the like can be used.
As the color filter 20, for example, as shown in FIG. 4, a colored translucent portion 21 is formed on one surface of a transparent base film 23 (transparent base portion) using a translucent colored resin material, for example, by printing or the like. (Film 20A with a colored layer) etc. are also employable.

  The color filter 20 may have a translucency that allows the reflected / scattered light from the reflection / scattering portion 15 of the light guide plate 11 to pass through the thickness of the color filter 20 at a location where the color forming portion 21 is provided. What is necessary is not required for translucency except for the portion where the colored light transmitting portion 21 is provided. For this reason, it is also possible to employ a light-shielding synthetic resin film colored in black or the like, for example, in place of the transparent base portion 22 where the colored translucent portion 21 is not provided.

Each colored light transmitting portion 21 provided corresponding to each reflection / scattering portion 15 is such that all the light emitted from the reflection / scattering portion 15 through the opening 32b of the mask 32 to the apparatus surface side is the colored light transmitting portion 21. As shown in FIG. 5, it is provided in a layered shape so as to cover the entire reflecting surface 16a of the dot-like recess 16 of the light guide plate 11 in plan view.
The colored light-transmitting portion 21 illustrated in FIG. 5 is formed in a layered shape so as to cover the entire reflecting surface 16a of the dot-shaped recess 16 of the light guide plate 11 and slightly extend around the reflecting surface 16a in plan view.

The display device 10 employs a color filter 20 having a plurality of types of colored light-transmitting portions 21 having different colors. For this reason, the color of the light emitted from the reflection / scattering part 15 to the apparatus surface side through the opening 32b of the mask 32 is not single, but depending on the color difference of the colored light-transmitting part 21 through which this light passes. Is different.
In other words, in this display device 10, the light emitted from the reflection / scattering portion 15 through the colored light-transmitting portion 21 of the color filter 20 is emitted to the device surface side through the opening 32 b of the mask 32. Color control can be easily realized.
Therefore, the reflected / scattered light at each of the reflection / scattering portions 15 can have a different color.

The color filter 20 of the display device 10 in the illustrated example has a first colored light-transmitting portion 21R that colors reflected / scattered light from the reflection / scattering portion 15 in red, a second colored light-transmitting portion 21G that is colored in green, and a blue color. The third colored translucent part 21B has three types (three color types) of colored translucent parts 21 that are distinguished by colors.
One or a plurality of colored translucent portions 21R, 21G, and 21B can be provided.
In this display device 10, the reflected and scattered light from the reflection / scattering portion 15 passes through one of the three color-type colored light-transmitting portions 21 and enters the device surface side through the opening 32 b of the mask 32. It is set as the structure radiate | emitted.

  The color filter 20 is not limited to the configuration having the colored light transmitting portions 21 of three color types, and a configuration having the colored light transmitting portions 21 of two or more color types can also be adopted. One or a plurality of colored translucent portions 21 of each color can be provided.

The display device 10 according to the present invention has a configuration in which the film-like color filter 20 is provided so as to overlap the surface 11 a side of the light guide plate 11, so that the colored light transmitting portion 21 with respect to the reflection / scattering portion 15 of the light guide plate 11 is assembled during device assembly. The effect that it becomes easy to ensure positioning accuracy is obtained.
Also, with this configuration, since the colored light-transmitting portion 21 of the color filter 20 is disposed close to the reflection / scattering portion 15 of the light guide plate 11, it is colored with the reflection / scattering portion 15 when the angle viewed from the device surface side is changed. There is an advantage that a positional deviation from the light transmitting portion 21 (a position appears to be shifted) is less likely to occur.

  In the case of using a color filter having a colored translucent portion 21 on one side of a transparent base film, such as the color filter illustrated in FIG. 4 (film 20A with a colored layer), the reflective scattering portion 15 of the light guide plate 11 is colored. In terms of bringing the position of the light transmitting portion 21 closer, it is preferable that the surface of the color filter on which the colored light transmitting portion 21 is formed is brought into contact with the light guide plate surface 11 a and the color filter is superimposed on the light guide plate 11. .

In addition, the color filter may be a filter layer constructed by forming the colored light-transmitting portions 21 (color filter body) at a plurality of locations on one side of the transparent plate by printing or the like. In this case, the transparent plate with a filter layer having a configuration in which the filter layer is formed on one side of the transparent plate is overlapped with the light guide plate 11 with the surface on which the filter layer is formed abutting against the light guide plate surface 11a. It is preferable that the colored light transmitting portion 21 is brought closer to the reflection / scattering portion 15 of the light guide plate 11.
Moreover, about the transparent plate with a filter layer, it is also possible to make a transparent plate function as the spacer 40 illustrated to FIGS. 1-3, and there also exists an advantage that it contributes to suppression of the number of parts of a display apparatus.

  Note that the colored layer-attached film 20 </ b> A illustrated in FIG. 4 can also be regarded as a configuration having a filter layer constituted by the colored light-transmitting portion 21 on one side of the transparent base film 23 (transparent base portion).

  The color filter is brought into contact with the light guide plate 11 with a weak force so as not to be in close contact with the light guide plate 11, or is brought into contact with the pressure filter without applying a pressure contact force. This is similarly employed in the relationship between the light guide plate and the color filter in other embodiments according to the present invention.

Further, the color filter is not limited to a configuration in which the colored light-transmitting portions 21 provided one by one corresponding to each of the plurality of reflection / scattering portions 15 of the light guide plate 11 are scattered in a todd shape.
For example, a part of the reflection / scattering portions 15 formed in large numbers on the light guide plate 11 is formed in a plurality of specific regions in the light guide plate 11 (specific regions in the plan view of the light guide plate 11). It is also possible to transmit the reflected scattered light to the same color by transmitting it through one colored light-transmitting portion 21 formed to extend corresponding to the entire specific region.

  Further, in the display device according to the present invention, the colored light-transmitting portions 21 of the color filter 20 correspond to all the reflection / scattering portions 15 of the light guide plate 11 from the reflection / scattering portions 15 through the openings 32 b of the mask 32. It is not limited to the configuration in which all the light emitted to the apparatus surface side is transmitted through the colored light transmitting portion, and the colored light transmitting portion is not provided for some of the plurality of reflection scattering portions 15 of the light guide plate 11 and reflected. It is also possible to adopt a configuration in which there is reflected scattered light emitted from the scattering portion 15 to the apparatus surface side through the opening 32b of the mask 32 without passing through the colored light transmitting portion 21.

FIG. 6 is a partial cross-sectional view showing the display device 10A in which the reflection / scattering portion 15 is formed on the back surface 11b side instead of the front surface 11a side of the light guide plate 11 (indicated by reference numeral 11A). On the back surface 11 b side of the light guide plate 11 </ b> A, a plurality of dot-like recesses 18 that are recessed toward the front surface 11 a are formed as the reflection / scattering portions 15.
The dot-shaped recess 18 is a V-shaped notch in a sectional view, and has a reflecting surface 18a that is an inclined surface that reflects incident light toward the surface 11a.

In order to make it difficult for positional deviation (the position appears to be shifted) between the reflection / scattering portion 15 and the colored light transmitting portion 21 when the angle seen from the apparatus surface side changes, the colored light transmitting portion 21 of the color filter 20 and It is preferable that the reflection / scattering portion 15 of the light guide plate 11 is close.
In this respect, the display device 10 of FIGS. 1 to 3 and the like having the reflection / scattering portion 15 on the surface 11a of the light guide plate 11 as compared to the display device 10A of FIG. 6 having the reflection / scattering portion 15 on the back surface 11b of the light guide plate 11A. Is more advantageous.

Further, the display device 10 shown in FIGS. 1 to 3 and the like has a shorter distance between the reflection / scattering portion 15 and the color filter 20 than the display device 10A shown in FIG. The diffusion until the reflected and scattered light reaches the color filter 20 can be reduced.
For this reason, the display device 10 (FIGS. 1 to 3 and the like) reflects and scatters even when the size (formation range) of the colored light transmitting portion 21 in the color filter 20 is reduced as compared with the display device 10A (FIG. 6). All the light emitted from the portion 15 to the device surface side through the opening 32 b of the mask 32 can be transmitted to the colored light transmitting portion 21, which is advantageous in terms of downsizing the colored light transmitting portion 21.

  The downsizing of the colored light transmitting part 21 is advantageous for increasing the density of forming the colored light transmitting part 21, for example, increasing the formation density of the plurality of colored light transmitting parts 21 having different colors. Thereby, it becomes easy to arrange the colored light-transmitting portions 21 corresponding to the individual reflection / scattering portions 15 in a region where the large number of reflection / scattering portions 15 are formed on the light guide plate 11 at a high density. It can easily handle image display.

FIG. 7 shows another example of the light guide plate 11, and the light guide plate 11 (light guide plate 11 </ b> B) has a dot-shaped concave portion 19 formed as a reflection / scattering portion 15 on the surface 11 a.
The dot-shaped concave portion 19 is a V-shaped cutout in a cross-sectional view, and the rear surface (opposite side to the incident end surface 11c) of the two surfaces that are arranged forward and rearward toward the incident end surface 11c and face each other. The reflecting surface 19a reflects incident light from the light source 12 (also causes scattering) and emits the light from the light guide plate surface 11a.
The reflecting surface 19a is a flat surface that is inclined so as to be separated from the incident end surface 11c toward the light guide plate surface 11a side. The reflecting surface 19a is not a smooth surface, but can be a rough surface on which light diffusion easily occurs.
FIG. 8 shows still another example of the light guide plate 11. The light guide plate 11 (light guide plate 11C) has a roughened portion 24 formed as a reflection / scattering portion 15 on the surface 11a. The roughened portion 24 is formed with fine irregularities by laser processing, sandblasting or the like. Further, as the reflection / scattering portion 15, a textured portion or the like can be employed.

As the color filter used in the display device according to the present invention, for example, as shown in FIG. 9, a configuration in which a plurality of color-type colored light-transmitting portions 21 are regularly arranged without gaps can be employed.
A display device 10B illustrated in FIG. 9 employs the above-described color filter 20B in place of the color filter 20 in the display device 10 shown in FIGS.
The color filter 20B has a configuration in which dot-like colored light-transmitting portions 21R, 21G, and 21B of three types of red, green, and blue are regularly arranged without gaps.
The planar view shape of the colored translucent portion 21 is not particularly limited, and may be a band shape having a constant width, a rectangular shape, a square shape, an elliptical shape, a circular shape, or the like. The planar light-transmitting portions 21 can have the same shape and size in plan view.

The color filter 20B has a configuration in which a first colored translucent part 21R, a second colored translucent part 21G, and a third colored translucent part 21B are formed in a repetitive pattern in a certain order in parallel with each other. .
The color filter 20B may have a configuration in which a large number of colored light-transmitting portions 21 are regularly arranged on one surface of the transparent base portion, for example, and the adjacent colored light-transmitting portions 21 are integrally formed. The structure which consists of a film-like member itself and does not have a transparent base part may be sufficient.

  Further, the light guide plate 11 of the display device 10B has a plurality of reflection / scattering portions 15 (dot-shaped concave portions 16 in the illustrated example) formed on the surface 11a side, and displays an image on the device surface side so as to be stereoscopically viewable. An array pattern of the reflection / scattering portions 15 for forming a divided image for the purpose. However, the formation position of the reflection / scattering part 15 of the display device 10B illustrated in FIG. 9 is such that the reflected / scattered light from the reflection / scattering part 15 is transmitted through the colored light-transmitting part 21 of the color filter 20B to be colored in a desired color. The color filter 20B corresponds to one selected from the plurality of colored light-transmitting portions 21.

In this display device 10B, each dot-like recess 16 is colored so that the entire reflection surface 16a is covered with one selected from the plurality of colored light-transmitting portions 21 of the color filter 20B in plan view. The position and size of the reflecting surface 16a with respect to the colored light transmitting portion 21 of the filter 20B are adjusted.
Thereby, all the light reflected and scattered by the reflecting surface 16a of the dot-like reflecting part 16 and emitted to the apparatus surface side through the opening 32b of the mask 32 is selected from the plurality of colored light transmitting parts 21 of the color filter 20B. It is configured to pass through one.

The colored light-transmitting portion 21 of the color filter 20B is formed in a fine dot shape such as a rectangular shape in a plan view having a long side of several hundred μm to 1 mm and a short side of several tens μm to several hundred μm.
For this reason, all of the reflected and scattered light emitted from the color transmissive part 21 of the color filter 20B to the surface side of the apparatus through the opening 32b of the mask 32 at the position of the reflective and scattered part 15 with respect to the colored transmissive part 21 of the color filter 20B. Even if it adjusts so that one selected from the light part 21 may permeate | transmit, there is almost no visual influence which this has on the display of a divided image.

FIG. 10 is a plan view showing an example of a planar arrangement of the reflection / scattering portion 15 (dot-like concave portion 16).
In this example, in the partial range 17 </ b> A of the display device 10, the band-like regions A <b> 1 to C <b> 1 perpendicular to the extending direction of the colored light transmitting portion 21 (left and right direction in FIG. 10) correspond to the opening 32 b of the mask 32. In the belt-like region B1 at the position where the light is transmitted, the reflection / scattering portion 15B (dot-like concave portion 16B) is formed at a position overlapping the colored light transmitting portion 21B (blue).
The band-like area A1 adjacent to one side (the left side in FIG. 10) of the band-like area B1 is located at a position corresponding to the light shielding part 32a in plan view, and the reflection / scattering part 15 (dot-like recess 16) is formed in the band-like area A1. It has not been.
The band-like area C1 adjacent to the other side of the band-like area B1 (the right side in FIG. 10) is at a position corresponding to the light shielding portion 32a in plan view, and the band-like area C1 is at a position overlapping the colored light-transmitting portion 21G (green). A reflection / scattering portion 15C (dot-like concave portion 16C) is formed.
For this reason, the reflected light from the reflection / scattering portion 15 is not visually recognized at the first viewpoint where the band-like region A1 is visually recognized through the opening 32b, but at the second viewpoint where the belt-like region B1 is visually recognized through the opening 32b. The reflected light (green) from the reflection / scattering portion 15B is visually recognized at the third viewpoint where the reflected light (blue) from the reflection / scattering portion 15B is visually recognized and the band-like region C1 is visually recognized.
In this example, since the reflection / scattering part 15 that overlaps the colored light-transmitting parts 21 that are different from each other can be formed in the belt-like regions A1 to C1, different colors can be displayed for each viewpoint, and thus various expressions are possible. It becomes possible.

FIG. 11 is a plan view showing another example of the planar arrangement of the reflection / scattering portion 15 (dot-like concave portion 16).
In this example, in the partial range 17B of the display device 10, three reflection / scattering portions 15A (dot-like concave portions 16A) are formed in the band-like region A1 at positions overlapping the colored light-transmitting portions 21B (blue). In the band-like region B1, nine reflection / scattering portions 15B (dot-like concave portions 16B) are formed at positions overlapping the colored light-transmitting portion 21G (green). In the band-like region C1, one reflection / scattering portion 15C (dot-like concave portion 16C) is formed at a position overlapping the colored translucent portion 21R (red).
For this reason, reflected light (blue) having an average intensity is visually recognized at the first viewpoint where the band-like area A1 is visually recognized through the opening 32b, and relatively strong at the second viewpoint where the band-like area B1 is visually recognized. From the third viewpoint where the reflected light (green) is visually recognized and the band-like region C1 is visually recognized, relatively weak reflected light (red) is visually recognized.
In this example, since a different number of reflection / scattering portions 15 can be formed in the belt-like regions A1 to C1, not only the color but also the light intensity can be adjusted for each viewpoint. Is possible.

FIG. 12 is a plan view showing still another example of the planar arrangement of the reflection / scattering portion 15 (dot-like concave portion 16).
In this example, the belt-like regions A1 to C1 are regions along the extending direction of the colored light-transmitting portion 21 (the vertical direction in FIG. 12), and each of the belt-like regions A1 to C1 is a pair of colored light-transmitting portions 21G, 21B and 21R are included.
In the band-like region A1, three reflection / scattering portions 15A (dot-like concave portions 16A) are formed in a range 17C so as to overlap the colored light-transmitting portion 21G (green). In the band-like region B1, one reflection / scattering portion 15B (dot-like concave portion 16B) is formed in the range 17D at a position overlapping the colored light-transmitting portion 21B (blue). The reflection / scattering portion 15 is not formed in the belt-like region C1.
For this reason, relatively strong reflected light (green) is visually recognized at the first viewpoint where the strip-shaped region A1 is visually recognized through the opening 32b, and relatively weak reflected light is observed at the second viewpoint where the strip-shaped region B1 is visually recognized. (Blue) is visually recognized, and the reflected light from the reflection / scattering portion 15 is not visually recognized at the third viewpoint where the belt-like region C1 is visually recognized.
In this example as well, as in the example shown in FIG. 11, not only the color but also the light intensity can be adjusted for each viewpoint, so that more various expressions are possible.
In addition, other strip | belt-shaped area | regions (for example, strip | belt-shaped area | region A2-C2) can also be set as the structure similar to strip | belt-shaped area | region A1-C1.

In addition, this invention is not limited to the above-mentioned embodiment, It can change suitably in the range which does not deviate from the main point.
In the above-described embodiment, a parallax barrier display device, that is, a display device using a mask in which slit-shaped or hole-shaped openings and light-shielding portions are alternately arranged is illustrated, but the present invention is not limited to this. A lens array type display device using a lenticular lens (lens array) instead of the mask can also be employed.
For example, FIG. 13 shows a display device 10C having a configuration in which a lenticular lens 50 is used instead of the mask 32 of the display device 10 described with reference to FIGS.
Note that the display device of the present invention may be configured without a mask or lens array.

  DESCRIPTION OF SYMBOLS 10, 10A, 10B, 10C ... Display apparatus 11, 11A ... Light guide plate, 11a ... Front surface, 11b ... Back surface, 11c ... End surface (incident end surface), 12 ... Light source (light emitting diode), 15 ... Reflection scattering part, 16, 18, 19 ... Reflection / scattering part (dot-like recess), 16a, 18a ... Reflection / scattering surface (reflection surface of dot-like recess), 20, 20A, 20B ... Color filter, 21 ... Colored translucent part, 32 ... Mask, 32a ... light-shielding portion, 32b ... opening, 50 ... lens array (lenticular lens).

Claims (8)

A light guide plate, and a light source that makes light incident on the light guide plate from its end face,
On the surface of the light guide plate, a plurality of reflection / scattering portions for reflecting and scattering incident light from the light source to the light guide plate surface side are formed,
A colored translucent part is provided on the surface side of the light guide plate,
A display device that displays a specific pattern formed by light including at least light that has been reflected and scattered by the reflection / scattering part and transmitted through the colored light-transmitting part.   The display device according to claim 1, wherein the colored light-transmitting portions 1 or more colored with a plurality of specific colors are provided on the surface side of the light guide plate.   The display device according to claim 1, wherein the reflection / scattering unit includes a reflection surface that reflects incident light from the light source to a light guide plate surface side.   The display device according to claim 1, wherein the reflection / scattering part is a notch formed on a surface side of the light guide plate.   The display device according to claim 3, wherein the reflection surface is inclined at an inclination angle of 40 to 60 degrees toward the light source with respect to the surface of the light guide plate.   The display device according to claim 1, wherein a mask or a lens array for forming a parallax barrier is provided on a further surface side of the colored light transmitting portion provided on the surface side of the light guide plate.   The display device according to claim 1, wherein in the mask, strip-shaped light shielding portions and openings along a specific direction are alternately arranged.   The display device according to claim 2, wherein the plurality of specific colors are red, green, and blue.