JP2018189769A - Transmission type screen and rear projection display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transmission type screen that has a complementary color layer on a surface of a pattern layer toward a light source, the transmission type screen capable of reducing visibility of a video displayed by video light.SOLUTION: A transmission type screen 100 displays a video by transmitting video light projected from a light source side through an observation side, and comprises: a pattern layer 1 that has a pattern; a complementary color layer 2 that is arranged on a surface of the pattern layer toward the light source; and a layer that has a light diffusion function. The complementary color layer has a pattern showing a color to be a complementary color to the color shown by the pattern on the pattern layer; the pattern on the pattern layer and the pattern on the complementary color layer correspond to overlap in plan view; the distance between a surface of the pattern layer toward the complementary color layer and a surface of the complementary color layer toward the pattern layer is 20 μm or less.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a transmissive screen that displays video by transmitting image light projected from one surface side to the other surface side, and a rear projection display device that includes the transmissive screen.

  As one of display devices that display video and images, there is a rear projection display device. The rear projection display device includes a transmissive screen that transmits image light projected from the rear side, and is also referred to as a rear projection display device. For example, as disclosed in Patent Documents 1 to 4, this transmissive screen can be viewed by an observer by emitting video light projected from a video light source to the side opposite to the side where the video light source is provided. Video can be displayed.

  In recent years, a technique has been proposed in which a predetermined pattern is displayed from the observation side even when image light is not projected onto a transmissive screen. With this technique, the design of the transmission screen can be improved. For example, Patent Documents 1 and 2 disclose a configuration in which a pattern layer for displaying a predetermined pattern is arranged on the observation side surface of the transmission screen. Further, it is disclosed that a light shielding layer having a light shielding property is formed on the light source side and a large number of openings are formed in a plan view on the pattern layer arranged on the observation side of the transmission screen. By forming a large number of openings in plan view of the pattern layer, when image light is projected from the light source side, the image light can be transmitted through the opening and displayed on the observation side. .

  The transmissive screen as described above can transmit the image light to the observation side through the opening formed in the pattern layer when the image light is projected from the light source side. Therefore, the observer can visually recognize a predetermined image by the image light transmitted to the observation side. Therefore, in order to improve the visibility of the image displayed by the image light, it is necessary to increase the amount of the image light transmitted to the observation side. As a method for increasing the amount of image light transmitted to the observation side, for example, there is a method of designing a large opening formed in the picture layer. On the other hand, as the opening formed in the picture layer becomes larger, the visibility of the picture by the picture layer observed when the image light is not projected from the light source side may decrease.

  Patent Document 4 discloses a technique in which a complementary color layer exhibiting a color that is complementary to the color exhibited by the pattern of the pattern layer is provided on the light source side of the pattern layer. By providing a complementary color layer on the light source side of the pattern layer, when image light is projected from the light source side, the image light emitted from the pattern layer is colored in the color that the pattern layer exhibits and is displayed by the image light. It is possible to solve the problem that the visibility of the video to be reduced is reduced. Therefore, the image light projected from the light source side can be transmitted from the entire surface of the pattern layer to the observation side, and the amount of image light transmitted to the observation side can be reduced without forming a large opening in the pattern layer. Can be secured.

JP 2005-37818 A JP 2007-524115 A JP 2013-213883 A JP 2003-43575 A

  Patent Document 4 discloses a transmissive screen in which a complementary color layer, a light diffusion layer, and a picture layer are sequentially laminated from the light source side. Therefore, the inventors of the present invention have examined the visibility of the transmission screen having the above-described configuration. As a result, the inventors discovered a problem that the visibility of an image displayed by image light decreases as the distance between the complementary color layer and the pattern layer increases. The inventors of the present invention have repeatedly studied the above problem. As the distance between the complementary color layer and the picture layer increases, the above problem is that the image light transmitted from the complementary color layer to the picture layer is reduced on the screen surface. Is incident not in the vertical direction but in an oblique direction, a positional shift occurs between the complementary color pattern of the complementary color layer and the pattern pattern of the pattern layer, and the image light is transmitted between the corresponding complementary color layer area and the pattern layer area. The new knowledge that it originates in not transmitting is obtained. The present invention has been made based on such new findings.

  That is, the present invention mainly provides a transmissive screen having a complementary color layer on the light source side surface of the picture layer, and capable of suppressing the visibility of the image displayed by the image light. And

  The present invention is a transmissive screen that displays image by transmitting image light projected from the light source side to the observation side, and includes a pattern layer having a pattern and a complementary color disposed on the light source side surface of the pattern layer A layer having a light diffusing function, and the complementary color layer has a pattern exhibiting a color complementary to the color exhibited by the pattern of the pattern layer, and the pattern of the pattern layer and the complementary color layer The pattern corresponds to overlap in plan view, and a transmission type screen is provided in which the distance between the surface of the pattern layer on the complementary color layer side and the surface of the complementary color layer on the pattern layer side is 20 μm or less.

  According to the present invention, the distance between the surface of the pattern layer on the complementary color layer side and the surface of the complementary color layer on the pattern layer side is set to 20 μm or less, thereby reducing the visibility of the image displayed by the image light. Can be suppressed. Further, since the complementary color layer has a pattern that exhibits a color that is complementary to the color that the pattern of the pattern layer exhibits, the white balance of the image light transmitted through the complementary color layer and the pattern layer can be maintained.

  In this invention, it is preferable to laminate | stack so that the said complementary color layer may contact with one surface of the said pattern layer. It is possible to more effectively suppress a reduction in the visibility of an image displayed by image light.

  In the present invention, an intermediate layer is preferably provided between the picture layer and the complementary color layer. The function of the intermediate layer can be imparted.

In the present invention, the transmitted light that is projected from the light source side and transmitted to the observation side of the image light has the a ^* value and b ^* value of the L ^* a ^* b ^* color system satisfying the following formula (1). It is preferable. The white balance of the image light transmitted through the complementary color layer and the picture layer can be more effectively maintained.
| A ^{* 2} + b ^{* 2} | ≦ 5 Formula (1)

In the present invention, it is preferable that the transmitted light that is projected from the light source side and transmitted to the observation side has a variation in L ^* value of the L ^* a ^* b ^* color system of 3 or less. The brightness of the image light transmitted through the complementary color layer and the picture layer can be kept uniform, and the visibility of the image displayed by the image light can be improved more effectively.

In the present invention, the complementary color that the pattern of the complementary color layer exhibits is the color that the pattern of the pattern layer exhibits, the a ^* value of the L ^* a ^* b ^* color system, and the pattern of the complementary color layer The sum of the present color and the a ^* value of the L ^* a ^* b ^* color system is 5 or less, and the b ^* value of the L ^* a ^* b ^* color system of the color of the above pattern layer. And the sum of the color exhibited by the pattern of the complementary color layer and the b ^* value of the L ^* a ^* b ^* color system is preferably 5 or less. The white balance of the image light transmitted through the complementary color layer and the picture layer can be more effectively maintained.

  In the present invention, it is preferable that a light shielding layer having a semi-shielding function is provided between the picture layer and the complementary color layer. By providing the light shielding layer, it is possible to suppress the influence of the complementary color layer on the visibility of the design of the design layer when viewing the design of the design layer.

  The present invention also provides a rear projection display device comprising an image light source that emits image light and the above-described transmission screen that transmits the image light from the image light source and emits the image light to the observation side.

  According to the present invention, by having the above-described transmission type screen, the distance between the surface of the pattern layer on the complementary color layer side and the surface of the complementary color layer on the pattern layer side is set to 20 μm or less. A reduction in the visibility of the displayed video can be suppressed. Further, since the complementary color layer has a pattern that exhibits a color that is complementary to the color that the pattern of the pattern layer exhibits, the white balance of the image light transmitted through the complementary color layer and the pattern layer can be maintained.

  The present invention provides an effect that a transmissive screen having a complementary color layer on a light source side surface of a picture layer can provide a transmissive screen capable of suppressing the visibility of an image displayed by image light. Play.

It is explanatory drawing for demonstrating the transmission type screen of this invention. It is explanatory drawing for demonstrating the complementary color in this invention. It is explanatory drawing for demonstrating the complementary color in this invention. It is explanatory drawing for demonstrating the transmission type screen of this invention. It is explanatory drawing for demonstrating the transmission type screen of this invention. It is explanatory drawing for demonstrating the transmission type screen of this invention. It is explanatory drawing for demonstrating the conventional transmissive screen.

  The transmission screen and the rear projection display device of the present invention will be described below.

A. Transmission screen The transmission screen of the present invention is a member that displays image by transmitting image light projected from the light source side to the observation side, and includes a pattern layer having a pattern, and a light source side surface of the pattern layer. A complementary color layer and a layer having a light diffusing function, wherein the complementary color layer has a pattern exhibiting a color complementary to the color exhibited by the pattern of the pattern layer, and the pattern of the pattern layer And the pattern of the complementary color layer corresponds to overlap in plan view, and the distance between the surface of the pattern layer on the complementary color layer side and the surface of the complementary color layer on the pattern layer side is 20 μm or less. is there.

  The transmissive screen of the present invention may be formed to be curved so as to have a concave curved surface whose center is depressed when viewed from the observer side, that is, a curved surface convex to the light source side, and is not curved. May be. The drawings shown in this specification are examples in which the transmission screen is not curved.

  The transmission screen of the present invention will be described below with reference to the drawings. However, the present invention can be implemented in many different modes, and should not be construed as being limited to the description of the embodiments described below. In addition, the drawings may be schematically represented with respect to the width, thickness, shape, and the like of each part as compared with the embodiments for the sake of clarity of explanation, but are merely examples, and the interpretation of the present invention is not limited thereto. It is not limited. In addition, in the present specification and each drawing, elements similar to those described above with reference to the previous drawings are denoted by the same reference numerals, and detailed description may be omitted as appropriate.

FIG. 1A is a schematic diagram showing an example of a rear projection display device using the transmission screen of the present invention. FIG. 1B is a schematic sectional view of the transmission screen 100 shown in FIG. As illustrated in FIG. 1A, the transmissive screen of the present invention transmits image light L ₁₀ projected from the image light source 10 from one surface side of the transmissive screen 100 to the other surface side. Video can be displayed. When the observer 20 observes the transmissive screen 100 from the other surface side, the observer 20 can visually recognize the image.

As shown in FIGS. 1A and 1B, the transmission screen 100 of the present invention can display a predetermined picture from the observation side even when no image light is projected. Specifically, the external light L ₂₀ irradiated from the observation side is reflected by the pattern layer 1 in the transmissive screen 100, so that the observer 20 can visually recognize the pattern displayed by the pattern layer 1. .

  As shown in FIG. 1B, the transmission screen 100 of the present invention includes a pattern layer 1 having a pattern and a complementary color layer 2 arranged on the light source side surface of the pattern layer 1. Moreover, the distance t between the surface of the pattern layer 1 on the complementary color layer 2 side and the surface of the complementary color layer 2 on the pattern layer 1 side is 20 μm or less. Furthermore, the transmission screen 100 shown in FIG. 1B is an example in which the layer 6 having a light diffusion function is formed integrally with the pattern layer 1. In addition, since it mentions later that the layer which has a light-diffusion function is integrated with a pattern layer, description here is abbreviate | omitted.

  In the present invention, the “complementary color layer has a pattern exhibiting a color complementary to the color exhibited by the pattern of the pattern layer. Further, the pattern included in the complementary color layer overlaps the pattern of the pattern layer in plan view. "Corresponding" has the following meaning. That is, first, the complementary color layer in the present invention has the same pattern so as to overlap with the pattern of the pattern layer 1 to be described later, as shown by the dotted line in FIG. In other words, the pattern that the complementary color layer 2 has corresponds to overlap with the pattern of the pattern layer 1 in plan view. In addition, the pattern layer 1 and the complementary color layer 2 in FIG. 2A are examples having a star pattern. Here, the outer color of the star pattern included in the pattern layer 1 is denoted by reference numeral C1a, and the inner color of the star pattern included in the pattern layer 1 is denoted by reference numeral C1b. Further, the color outside the star pattern included in the complementary color layer 2 is indicated by a symbol C2a, and the color inside the star pattern included in the complementary color layer 2 is indicated by a symbol C2b. In the present invention, at this time, the color C1a exhibited by the pattern layer 1 and the color C2a exhibited by the complementary color layer 2 are complementary to each other, and the color C1b exhibited by the pattern layer and the color C2b exhibited by the complementary color layer 2 are mutually complementary. It means that there is a complementary color relationship. 2A and 2B are examples in which a light diffusion layer is provided on the surface of the complementary color layer 2 opposite to the pattern layer 1 as the layer 6 having a light diffusion function.

  In the present invention, “complementary color relationship” means a relationship in which the first color and the second color appear achromatic when white light is transmitted. Hereinafter, the color of the pattern layer and the color of the complementary color layer will be described as the first color and the second color, respectively. Here, “achromatic color” includes white, gray, or black. Further, “complementary color relationship” means, for example, a relationship between colors at opposite positions in the Munsell hue circle. The “position facing the Munsell hue ring” includes not only the opposite position but also a color adjacent to the opposite color. As a specific example of “the first color and the second color have a complementary color relationship”, for example, when the first color is blue, the second color is yellow, or the first color is red. There is a relationship such that the second color is green.

In the present invention, “complementary color relationship” preferably has the following relationship using, for example, the L ^* a ^* b ^* color system developed by the International Commission on Illumination (CIE).

That is, in the present invention, the image light is projected from the light source side, and the transmitted light that has passed through each of the layers including the complementary color layer and the pattern layer has the a ^* value and b ^* value of the L ^* a ^* b ^* color system, It is preferable to satisfy the following formula (1).
| A ^{* 2} + b ^{* 2} | ≦ 5 Formula (1)
Therefore, for example, as shown in FIG. 2B, transmitted light L _10a and L _10b when the image light L ₁₀ projected from the light source side passes through the complementary color layer 2 and the picture layer 1 are L ^* a ^* b ^{* a *} and ^{b *} values of the color system preferably satisfies the above formula (1). FIG. 2B is a cross-sectional view taken along the line AA in FIG. 2A and 2B show an example having the pattern layer 1 and the complementary color layer 2. For example, as shown in FIG. 1B, the light shielding layer 3 and the transparent substrate 4 are used. You may have. When the transmissive screen of the present invention is composed of four layers having a picture layer 1, a complementary color layer 2, a light shielding layer 3 and a transparent substrate 4, as shown in FIG. For the transmitted light that has passed through the layer, it is preferable that the a ^* value and b ^* value of the L ^* a ^* b ^* color system satisfy the above formula (1).

In the present invention, the a ^* value and b ^* value of the L ^* a ^* b ^* color system of the transmitted light that is projected from the light source side and transmitted to the observation side is the spectral value in the visible light region, for example. It can be calculated from the transmittance. Spectral transmittance can be measured using, for example, JASCO V-7100 UV-visible spectrophotometer.

In the present invention, the transmitted light that is projected from the light source side and transmitted to the observation side in the present invention is such that the a ^* value and b ^* value of the L ^* a ^* b ^* color system satisfy the above formula (1). Among them, it is preferable to satisfy the following formula (2).
| A ^{* 2} + b ^{* 2} | ≦ 3 Formula (2)

  In the present invention, by setting the distance between the surface on the complementary color layer side of the pattern layer and the surface on the pattern layer side of the complementary color layer to 20 μm or less, the following effects can be obtained.

First, Patent Document 4 described above discloses a transmissive screen in which a complementary color layer, a light diffusion layer, and a pattern layer are sequentially laminated from the light source side. Therefore, the inventors of the present invention have examined the visibility of the transmission screen having the above-described configuration. As a result, for example, as in the conventional transmissive screen 100 'shown in FIG. 7, with the distance t between the complementary layer 2 and the pattern layer 1 increases, the visibility of the image displayed by the image light L ₁₀ I found a problem that would decrease. The inventors of the present invention have made studies on the above problems and have obtained the following knowledge about the reason why the above problems occur.

Here, in FIG. 7, the color C1a exhibited by the pattern layer 1 and the color C2a exhibited by the complementary color layer 2 are complementary to each other, and the color C1b exhibited by the pattern layer and the color C2b exhibited by the complementary color layer 2 are complementary colors. It means that there is a relationship. Further, as shown in FIG. 7, the image light L ₁₀ that is transmitted from the complementary color layer 2 to the picture layer 1 includes the image light L _10a that is transmitted perpendicularly to the transmissive screen 100 ′ and the transmissive screen 100 ′. There are image lights L _10b and L _10c that pass through in an oblique direction. Furthermore, since the reference numerals not described in FIG. 7 can be the same as those in FIGS. 1A and 1B, description thereof is omitted here.

In the transmissive screen 100 ′ having the complementary color layer 2, the image light L ₁₀ originally transmitted through the complementary color layer 2 is transmitted through the corresponding pattern layer 1, so that the image light L ₁₀ is a color C _{1 a} having a complementary color relationship with each other. The color C2a or the region exhibiting the color C1b and the color C2b is transmitted, and a predetermined effect by providing the complementary color layer 2 can be obtained. However, as shown in FIG. 7, in the transmissive screen 100 ′, when the distance t between the complementary color layer 2 and the picture layer 1 increases, the video light L _10b that is transmitted obliquely with respect to the transmissive screen 100 ′. , L _10c may not pass through the region of the complementary color layer 2 and the region of the picture layer 1 that exhibit colors that are complementary to each other. This is presumably due to the fact that the image lights L _10b and L _10c are refracted between the complementary color layer and the picture layer.

Therefore, the inventors of the present invention have repeatedly studied based on the above findings. As a result, by setting the distance between the surface on the complementary color layer side of the pattern layer and the surface on the pattern layer side of the complementary color layer to 20 μm or less, for example, as shown in FIG. It can be seen that image light L _10b and L _{10c that} are transmitted in an oblique direction can suppress the occurrence of a problem that the complementary color layer 2 region and the pattern layer 1 region that exhibit complementary colors are not transmitted. It was. In other words, as in the image light L _10c shown in FIG. 2B, the distance between the surface of the pattern layer 1 on the complementary color layer 2 side and the surface of the complementary color layer 2 on the pattern layer 1 side is set to 20 μm or less. Thus, it has been found that even if the image light L _10c is refracted, the occurrence of the above-described problems can be suppressed.

  In the present invention, the distance between the surface of the pattern layer on the complementary color layer side and the surface of the complementary color layer on the pattern layer side may be 20 μm or less. Therefore, in the present invention, for example, as shown in FIG. 2 (b), the complementary color layer 2 may be laminated on one surface of the pattern layer 1 or alternatively, as shown in FIG. 1 (b). As shown in FIG. 2, an intermediate layer 30 may be provided between the pattern layer 1 and the complementary color layer 2. FIG. 1B shows an example in which the intermediate layer 30 is the light shielding layer 3.

  In the present invention, the distance between the surface of the pattern layer on the complementary color layer side and the surface of the complementary color layer on the pattern layer side may be 20 μm or less, but is preferably 10 μm or less, particularly 5 μm or less. It is preferable that Furthermore, in this invention, it is preferable to laminate | stack so that a complementary color layer may contact one side of a pattern layer. It is possible to effectively suppress the occurrence of the above-mentioned problems that occur as the distance between the complementary color layer and the pattern layer increases, and to sufficiently suppress the decrease in the visibility of the image displayed by the image light. it can. When an intermediate layer is provided between the pattern layer and the complementary color layer, the distance between the surface of the pattern layer on the complementary color layer side and the surface of the complementary color layer on the pattern layer side depends on the type of the intermediate layer. Can be adjusted accordingly.

  Here, the “intermediate layer” refers to a member provided between the picture layer and the complementary color layer, and the intermediate layer may be a single layer or a plurality of layers. Such an intermediate layer is not particularly limited as long as it is a member used for a transmissive screen, and examples thereof include a light shielding layer 3 shown in FIG. 1B and a light diffusion layer although not shown. It is done. Since the light shielding layer, the light diffusion layer, and other members will be described later, description thereof is omitted here.

  Further, in the present invention, the pattern layer has a complementary color layer on the light source side surface, and the complementary color layer has a pattern exhibiting a color that is complementary to the color exhibited by the pattern of the pattern layer. The effect is produced. That is, conventionally, there has been proposed a technique of providing a picture layer for displaying a predetermined picture to an observer when image light is not projected from the light source side to the transmissive screen. At this time, the design layer is provided with an opening for transmitting the image light to the observation side, and a light shielding layer is provided on the light source side of the design layer so that the image light does not pass through the design layer. This is for the purpose of suppressing the occurrence of a problem that the visibility of the image to be displayed by the image light is reduced due to the pattern and color of the image layer when the image light is transmitted through the image layer. Yes. Therefore, in order to transmit the image light to the observation side, it is necessary to secure a predetermined size as the opening, but if the opening is too large, the visibility of the pattern to be displayed by the pattern layer decreases. The problem arises. On the other hand, if the opening is too small, the image light cannot be sufficiently transmitted to the observation side, causing a problem that the use efficiency of the image light is lowered.

  On the other hand, in the present invention, by providing a complementary color layer on the light source side surface of the pattern layer and allowing the image light to pass through the complementary color layer and the pattern layer, it is possible to suppress a decrease in the use efficiency of the image light. . Further, since the complementary color layer has a pattern that exhibits a color that is complementary to the color that the pattern of the pattern layer exhibits, the white balance of the image light transmitted through the complementary color layer and the pattern layer can be maintained. Therefore, like the above-described conventional transmission screen, it is possible to suppress a decrease in the visibility of the image that the image light is intended to display.

The “maintaining white balance” specifically means that the a ^* value and b ^* value of the L ^* a ^* b ^* color system of the image light transmitted through the complementary color layer and the picture layer are expressed by the above formula ( 1) means satisfying. Since the above formula (1) has been described above, the description thereof is omitted here.

In the present invention, it is preferable that the transmitted light that is projected from the light source side and transmitted to the viewing side of the image light has an L ^* value variation of 10 or less in the L ^* a ^* b ^* color system. As described above, the brightness of the picture displayed by the picture layer is determined by the fact that the transmission light projected from the light source side and transmitted to the observation side has a variation on the transmissive screen within a predetermined range. The pattern can be kept uniform, and the visibility of the pattern displayed by the pattern layer can be improved. In the present invention, among the transmitted light that is projected from the light source side and transmitted to the observation side, the variation in the L ^* value of the L ^* a ^* b ^* color system is preferably 5 or less. In particular, it is preferably 3 or less. Note that “the transmitted light that is projected from the light source side and transmitted to the viewing side from the image light side has an L ^* value variation of 3 or less in the L ^* a ^* b ^* color system” means that in a transmissive screen, When the L ^* value of the transmitted light transmitted from an arbitrary region is measured, the obtained L ^* value difference is 3 or less in any region. This is the same when the L ^* value variation of the L ^* a ^* b ^* color system is 10 or less or 5 or less.

  In the present invention, the variation on the transmissive screen of the transmitted light that is projected from the light source side and transmitted to the observation side can be calculated from the spectral transmittance in the visible light region, for example. Spectral transmittance can be measured using, for example, JASCO V-7100 UV-visible spectrophotometer.

  Hereinafter, the transmission screen of the present invention will be described in detail.

1. Complementary color layer The complementary color layer in the present invention is a member disposed on the light source side surface of the pattern layer. The complementary color layer has a pattern that exhibits a color that is complementary to the color that the pattern of the pattern layer exhibits. Furthermore, the pattern of the complementary color layer corresponds to overlap with the pattern of the pattern layer in plan view.

The complementary color layer in the present invention selects a color that is complementary to the color that the pattern of the pattern layer exhibits. Here, in the present invention, the “complementary color” can be expressed from a color space composed of three axes L ^* , a ^* and b ^* of the L ^* a ^* b ^* color system, for example. it can. That is, the “complementary color” means that when the first color is plotted in the color space of the L ^* a ^* b ^* color system, the second color is plotted at the position where the first color plot and the point object are pointed. Means that FIG. 3A is a schematic diagram showing a color space of the L ^* a ^* b ^* color system. FIG. 3A shows the color space in three dimensions by three axes L ^* , a ^*, and b ^* . On the other hand, when representing a “complementary color” in the present invention, it can be a point object when represented in two dimensions by two axes a ^* and b ^* . For example, as shown in FIG. 3 (b), when two-dimensionally represented by two axes a ^* and b ^* , if the a ^* value and b ^* value of the first color are plotted with the symbol C, The a ^* value and b ^* value of the second color, which is a complementary color of one color, are plotted with a symbol C ′ that is a point object of the plot indicated by the symbol C of the first color.

In the present invention, examples of a method for selecting a color that is complementary to the color exhibited by the pattern in the pattern layer include the following methods. That is, the sum of the a ^* values of the first color and the second color is 0 when the color exhibited by the pattern in the pattern layer and the color exhibited by the pattern in the complementary color layer are the first color and the second color, respectively. There is a method of selecting a color that the pattern of the complementary color layer exhibits so that the values are close to each other and the sum of the b ^* values of the first color and the second color is close to 0. More specifically, the sum of the a ^* values of the first color a ^* value and the second color a ^* value is preferably 5 or less, more preferably 3 or less, particularly 0. Preferably there is. Further, the sum of the first color b ^* value and the second color of the b ^* value is preferably 5 or less, preferably among them 3 or less, particularly preferably 0. A numerical range sum mentioned above for the first color a ^* value and the second color of the a ^* values, and numerical range sum mentioned above for the first color b ^* value and the second color of the b ^* value Thus, the color exhibited by the pattern of the complementary color layer can be a complementary color of the color exhibited by the pattern of the pattern layer. In other words, the color exhibited by the pattern in the pattern layer and the color exhibited by the pattern in the complementary color layer can have a more precise complementary color relationship.

In the present invention, it is preferable that the transmission light, which is projected from the light source side and transmitted to the observation side, has little variation on the transmission screen. The visibility of the image displayed by the image light source can be improved. In the present invention, it is preferable to select a complementary color layer that satisfies the following conditions for the pattern layer in order to suppress variation in transmitted light on the transmissive screen. That is, it is preferable to select a complementary color layer in which the variation in the L ^* value of the L ^* a ^* b ^* color system is 3 or less for the transmitted light that is projected from the light source side and transmitted to the observation side. .
In consideration of the spectral transmittance, it is preferable that the sum of the corresponding pattern layer, complementary color layer, and spectral transmittance is constant in the visible light region. A certain range cannot be defined in detail because the transmittance range varies depending on the wavelength dispersion. Therefore, it is preferable that each value of the L ^* a ^* b ^* color system is calculated from the spectral transmittance and each value falls within a desired range. Further, when an intermediate layer is provided between the pattern layer and the complementary color layer, it is necessary to consider that image light is transmitted through the intermediate layer. Therefore, when selecting the complementary color layer corresponding to the pattern layer, it is necessary to examine the transmitted light transmitted through the complementary color layer and the intermediate layer as described above.

  The pattern of the complementary color layer in the present invention corresponds to the pattern of the pattern layer so as to overlap with the pattern of the pattern layer in plan view, and thus the same pattern as the pattern of the pattern layer. Therefore, it is appropriately selected according to the pattern of the pattern layer described later. Here, examples of the “picture” in the present invention include patterns, line drawings, characters, figures, symbols, and the like. In the present invention, a pattern is also provided when the complementary color layer has a single color.

  The complementary color layer in the present invention is usually a member having a predetermined transmittance. Since the complementary color layer has a predetermined transmittance, the image light can pass through the complementary color layer when the image light is projected from the light source side. As the predetermined transmittance of the complementary color layer, for example, the total light transmittance is preferably 50% or more, more preferably 70% or more, and particularly preferably 80% or more. When image light is projected onto the transmissive screen, more image light can be emitted to the observation side, so that the visibility of the image displayed by the image light is improved. In addition, the total light transmittance of a complementary color layer can be measured by the method based on JISK7361-1: 1997, for example.

  The material of the complementary color layer is preferably a material that can draw a desired pattern. In the present invention, a picture is usually drawn using a printing method. Therefore, it is preferable to select a material that can be used for the printing method as the material of the complementary color layer. Examples of such materials include generally known inorganic pigments and organic pigments.

  Additives such as fillers, plasticizers, dispersants, lubricants, antistatic agents, antioxidants, antifungal agents, and the like can be used as appropriate for the above-mentioned materials of the complementary color layer.

  The thickness of the complementary color layer can be appropriately adjusted according to the pattern displayed by the complementary color layer, the use and size of the transmissive screen, and the like. The specific thickness of the complementary color layer is, for example, preferably in the range of 1 μm to 20 μm, and more preferably in the range of 1.5 μm to 10 μm.

  The complementary color layer in the present invention may have a pattern-like opening as necessary, or may not have an opening. When the complementary color layer has a pattern-like opening, for example, as shown in FIGS. 4A and 4B, the pattern-like opening R is also formed in the pattern layer 1 and formed in the complementary color layer 2. It is preferable that the pattern-shaped opening R and the pattern-shaped opening R formed in the picture layer 1 overlap in plan view. FIG. 4B is a cross-sectional view taken along line B-B in FIG. In addition, the opening in the complementary color layer can be the same as the opening in the pattern layer described in the section “2.

2. Picture layer The picture layer in the present invention is a layer having a picture.

  Since the pattern of the pattern layer in the present invention corresponds to the pattern of the complementary color layer described above so as to overlap in plan view, it is the same pattern as the pattern of the complementary color layer. Accordingly, the pattern of the pattern layer can be the same as the contents described in the section “1. Complementary color layer”, and the description is omitted here.

  In addition, the transmittance, material, thickness, and the like of the pattern layer in the present invention can be the same as the contents described in the above section “1. Complementary color layer”, and thus description thereof is omitted here.

  The pattern layer in the present invention may have a pattern-like opening as necessary, or may not have an opening. When the pattern layer has a pattern-shaped opening, for example, as illustrated in FIGS. 4A and 4B, the pattern layer 1 is also formed with a pattern-shaped opening R and formed in the pattern layer 1. It is preferable that the pattern-shaped opening R and the pattern-shaped opening R formed in the complementary color layer 2 overlap in plan view. When the pattern layer 1 and the complementary color layer 2 have the opening R, the light diffusion layer 6 may be disposed in the opening R, and a separate sheet-shaped light is provided so as to overlap the opening R in plan view. A diffusion layer 6 may be disposed. Since the light diffusion layer will be described later, description thereof is omitted here.

  When the picture layer in the present invention has a pattern-like opening, the area ratio between the area of the opening and the other area in the plan view of the picture layer is the image when the image light is projected onto the transmissive screen. When the area ratio is such that light is transmitted to the observation side and the observer can fully see the image, and no image light is projected onto the transmission screen, the image layer is It is preferable that the displayed pattern has an area ratio that allows an observer to sufficiently recognize the pattern. Therefore, in the plan view of the optical functional layer, the area ratio between the region of the opening and the other region can be adjusted as appropriate according to the use of the transmissive screen. As the specific area ratio, for example, the region of the opening and the other region are preferably in the range of 1: 6 to 6: 1, and more preferably 1: 4 to 4: 1. It is preferably within the range, and particularly preferably within the range of 1: 4 or more and 1: 1 or less.

  The plan view shape of the pattern-like opening in the pattern layer is preferably a shape that can exhibit a function of sufficiently transmitting the image light to the observation side when the image light is projected onto the transmissive screen. . Specific examples of the planar shape of the opening include a circular shape, a rectangular shape, and a lattice shape. It is usually circular. In addition, the circle here includes an ellipse and the like. Further, a large number of openings in the pattern layer are usually formed. Therefore, the planar view shape of many opening parts may be the same, and may differ.

  The size of the plan view shape of the pattern-like opening in the pattern layer is preferably a size that satisfies the area ratio described above. As a specific size when the shape of the opening in plan view is circular, for example, the diameter can be 5 mm or less, and the interval between adjacent openings can be 5 mm. Or a diameter can be 0.1 mm or less, and the space | interval of an adjacent opening part can be 0.1 mm. In addition, the space | interval of an adjacent opening part here points out the distance shown with the code | symbol W of Fig.4 (a), for example. On the other hand, when the planar view shape of the pattern-like opening in the pattern layer is a lattice, as a specific size of the opening, for example, the length of one side of the lattice can be 4 mm or less. Moreover, when the planar view shape of the pattern-shaped opening part in a pattern layer is a strip shape, as a specific magnitude | size of an opening part, for example, the width of a strip shall be 4 mm or less, and the adjacent strip-shaped opening part is The interval can be 4 mm or less.

3. Layer Having Light Diffusion Function In the present invention, a layer having a light diffusion function is provided. In addition, the layer which has a light-diffusion function in this invention may be formed as an independent layer, and may be formed integrally with a pattern layer, a complementary color layer, etc. Hereinafter, when the layer having the light diffusion function is formed as an independent layer, the layer having the light diffusion function may be referred to as a light diffusion layer.

  Examples of the layer having a light diffusion function in the present invention include the following modes. For example, as shown in FIG. 5 (a), an independent light diffusion layer 6 is arranged on the observation side surface of the pattern layer 1, or as shown in FIG. 5 (b). As 6, an embodiment may be mentioned in which the transparent substrate 4 is disposed on the light source side surface. Furthermore, as shown in FIG.5 (c), the aspect etc. in which the layer 6 which has a light-diffusion function was integrally formed with the pattern layer 1 are mentioned. The mode illustrated in FIG. 5C is a mode in which, for example, the observation side surface of the pattern layer 1 has a predetermined surface roughness, and the pattern layer 1 has a light diffusion function. Specifically, it is preferable to use rubbed glass as the pattern layer 1.

  In the present invention, although not illustrated, the layer having a light diffusion function may be disposed between the pattern layer and the complementary color layer. In this case, the pattern layer and the layer having the light diffusion function are provided. The complementary color layer and the layer having a light diffusing function may be integrally formed. When the pattern layer and the layer having a light diffusion function are integrally formed, or when the complementary color layer and the layer having a light diffusion function are formed integrally, as the pattern layer or the complementary color layer, for example, It is preferable to use frosted glass.

  Furthermore, in this invention, as shown to Fig.5 (a), when the independent light-diffusion layer 6 is arrange | positioned at the surface at the side of observation of the pattern layer 1, the light-diffusion layer 6 functions as a surface protective layer. You may have. That is, the light diffusion layer may be formed integrally with a surface protective layer described later. Since the surface protective layer is described in the section “6. Surface functional layer” described later, description thereof is omitted here.

  Hereinafter, a case where the layer having the light diffusion function is an independent layer, that is, a light diffusion layer will be described.

  The light diffusion layer in the present invention is usually a member having optical transparency. The light transmittance of the light diffusing layer is preferably such that the image light can pass through the light diffusing layer when image light is projected onto the transmissive screen of the present invention. Here, as a specific light transmittance of the light diffusion layer, for example, the total light transmittance is preferably within a range of 60% or more, and more preferably within a range of 80% or more, particularly 90. % Is preferably within the range of at least%. When image light is projected onto the transmissive screen, more image light can be emitted to the observation side, so that the visibility of the image displayed by the image light is improved. In addition, the total light transmittance of a light-diffusion layer can be measured by the method based on JISK7361-1: 1997, for example.

  The light diffusion layer in the present invention can be obtained, for example, by dispersing a particulate light diffusion material in a transparent resin. In the present invention, a case where a transparent resin is used will be described. However, a glass containing a rubbed glass may be used instead of the transparent resin, and a fluid such as liquid or liquid crystal is used in addition to a solid. It is also possible.

  The particulate light diffusing material and the transparent resin have different refractive indexes. As a refractive index of transparent resin, it can be in the range of 1.45 or more and 1.60 or less, for example. On the other hand, the refractive index of the light diffusing material only needs to have a predetermined difference from the refractive index of the transparent resin described above, and can be appropriately selected according to the refractive index of the transparent resin. The refractive index of the light diffusing material is preferably selected within the range of 1.30 to 2.40, and more preferably within the range of 1.40 to 1.60. The absolute value of the difference in refractive index between the transparent resin and the light diffusing material is preferably in the range of 0.01 or more and 0.20 or less, for example. When the absolute value of the refractive index difference is within the above range, a transmission screen having a desired haze value can be obtained.

  The transparent resin used for the light diffusion layer may be, for example, a resin having optical transparency, and specifically, a polyethylene terephthalate resin, a polycarbonate resin, a methyl methacrylate / styrene resin, a methyl methacrylate / butadiene / styrene. Examples thereof include resins, acrylic resins, triacetyl cellulose resins, polyethylene naphthalate resins, and the like. In addition, one or more kinds of various additives such as a crosslinking agent, an ultraviolet absorber, an antioxidant, an antistatic agent, a flame retardant, a plasticizer, and a colorant are added to these transparent resins as necessary. May be.

  Examples of the light diffusing material used in the light diffusing layer include organic fillers such as plastic beads, and materials having high transparency are particularly preferable. As the plastic beads, for example, those made of melamine resin, acrylic resin, acrylonitrile styrene resin, polycarbonate resin, etc. can be applied. Silicon-based beads can also be used as a light diffusing material. Furthermore, these light diffusing materials can be appropriately selected according to the desired diffusion function and the like, and can be used by combining them at a predetermined ratio.

  The particulate light diffusing material includes, for example, a light diffusing material having a shape such as a spherical shape, a flat shape, an indeterminate shape, a star shape, and a gold flat sugar shape. The particulate light diffusing material may be, for example, hollow particles or core-shell particles.

  The average particle diameter of the particulate light diffusing material is, for example, preferably in the range of 1 μm to 50 μm, and more preferably in the range of 5 μm to 30 μm. When the average particle diameter of the particulate light diffusing material has the above lower limit, the light diffusing function can be sufficiently exerted, and the visibility of the image viewed through the image light through the light diffusing layer can be reduced. Can be suppressed. Moreover, since the average particle diameter of a particulate light-diffusion material has the said upper limit, the fall of the light transmittance of a light-diffusion layer can be suppressed, and the fall of the contrast by glare can be suppressed.

  The content of the particulate light diffusing material in the light diffusing layer includes the refractive index of the transparent resin used in the light diffusing layer, the refractive index of the light diffusing material, the average particle diameter of the particulate light diffusing material, and the thickness of the light diffusing layer. The particulate light diffusing material can be appropriately adjusted according to the dispersion state in the transparent resin. For example, with respect to 100 parts by mass of the transparent resin, the particulate light diffusing material can be within a range of 0.3 parts by mass or more and 20 parts by mass or less, and particularly, within a range of 1 part by mass or more and 10 parts by mass or less. It is preferable that When the content of the particulate light diffusing material in the light diffusing layer has the above lower limit, the light diffusing layer can exhibit a desired light diffusing function. Moreover, when the content of the particulate light diffusing material in the light diffusion layer has the above upper limit, it is possible to suppress a decrease in light transmittance of the light diffusion layer.

  The thickness of the light diffusion layer can be appropriately adjusted according to the average particle diameter and content of the particulate light diffusion material used for the light diffusion layer, the refractive index of the transparent resin, the refractive index of the light diffusion material, and the like. In the present invention, it is preferable that the thickness of the light diffusion layer is such that a desired light diffusion function can be exhibited. The specific thickness of the light diffusion layer is, for example, preferably in the range of 0.05 mm to 1.5 mm, and more preferably in the range of 0.1 mm to 1.0 mm. When the thickness of the light diffusion layer has the above lower limit, the light diffusion layer can exhibit a desired light diffusion function. In addition, since the thickness of the light diffusion layer has the above upper limit, it suppresses a decrease in visibility such as a blurred image or a reduced resolution displayed when image light is projected onto a transmissive screen. Can do.

  The light diffusion layer preferably has a predetermined haze value. The specific haze value of the light diffusion layer is preferably in the range of 60% or less, for example. When the haze value of the light diffusion layer is within the above range, it is possible to suppress a decrease in visibility such as a blurred image displayed when image light is projected onto the transmissive screen. In addition, the haze value of a light-diffusion layer can be measured based on JISK7105: 1981, for example.

  The method for forming the light diffusion layer in the present invention is not particularly limited as long as it can form a light diffusion layer having a desired light diffusion performance, and generally known methods can be adopted. For example, after forming a metal thin film layer having a pattern-shaped opening on a transparent substrate, a gravure coat, a paint in which a particulate light diffusing material is dispersed in a transparent resin so as to cover the metal thin film layer, Examples of the method include coating using a known method such as roll coating, bead coating, spray coating, and inkjet, and drying.

4). Intermediate Layer The intermediate layer in the present invention is a member disposed between the pattern layer and the complementary color layer. The intermediate layer may be a single layer or a plurality of layers. Examples of such an intermediate layer include a light shielding layer and a light diffusion layer. The light diffusing layer can be the same as that described in the section “3. Layer having a light diffusing function”, and the light shielding layer can be described later in the section “5. Light shielding layer”. Therefore, the description is omitted here.

5. Light Shielding Layer In the present invention, a light shielding layer having a semi-shielding function may be provided between the pattern layer and the complementary color layer. The light shielding layer is, for example, a member indicated by reference numeral 3 in FIG.

  Here, the “semi-shielding function” means that a light-shielding layer having a semi-shielding function is disposed between the pattern layer and the complementary color layer, so that when the transmissive screen is observed from the observation side, It is possible to prevent the displayed pattern from being affected by the color exhibited by the complementary color layer, thereby reducing the visibility of the pattern on the pattern layer, and when the image light is projected from the light source side, the image light Is a function that can be transmitted to the observation side without completely shielding the screen.

  The light shielding layer in the present invention is suitable, for example, when the color of the pattern displayed by the pattern layer is light. When the color of the pattern displayed by the pattern layer is light, it is necessary to increase the thickness of the pattern layer in order to prevent the pattern from being transparent. On the other hand, when the thickness of the pattern layer becomes too thick, the thickness of the transmissive screen tends to increase. In such a case, by providing the light shielding layer, for example, it is possible to suppress the see-through of the pattern without increasing the thickness of the pattern layer.

  For the light transmittance of the light shielding layer having a semi-shielding function, for example, the total light transmittance is preferably in the range of 30% to 99%, and more preferably in the range of 50% to 95%. It is preferable that it is in the range of 70% or more and 90% or less. When the total light transmittance of the light shielding layer is within the above range, a desired semi-shielding function can be exhibited, and the above-described effects obtained by providing the light shielding layer can be sufficiently obtained. In addition, the total light transmittance of a light shielding layer can be measured by the method based on JISK7361-1: 1997, for example.

  The material of the light shielding layer is preferably a material that can suppress a decrease in the visibility of the pattern displayed by the pattern layer due to the influence of the complementary color layer. Examples of the material for the light shielding layer include a resin material containing a coloring material. In addition, the color of the coloring material used for the light shielding layer can be appropriately selected according to the color of the pattern displayed by the pattern layer, and is not particularly limited. In the present invention, it is particularly preferable that the light shielding layer exhibits a white color. This is because the visibility of the design can be improved without affecting the color of the design displayed by the design layer. In addition, about a specific material, since it is generally a well-known coloring material and the coloring material which can be used for a light-diffusion layer, for example can be applied, description here is abbreviate | omitted. Furthermore, examples of the resin material include methyl methacrylate / butadiene / styrene resin, acrylic resin, polycarbonate resin, and polyethylene terephthalate resin.

  The thickness of the light shielding layer is preferably such a thickness that a desired semi-shielding function can be exhibited. In addition, the thickness of the light shielding layer can be adjusted as appropriate according to the color of the light shielding layer. The specific thickness of the light shielding layer is, for example, preferably 20 μm or less, more preferably 10 μm or less, and particularly preferably 5 μm or less.

6). Transparent Substrate The transmission screen of the present invention may have a transparent substrate for supporting the picture layer and the complementary color layer described above. The transparent substrate may be disposed on the light source side of the transmission screen or may be disposed on the observation side. Usually, for example, as shown in FIG. It is arranged on the light source side of the screen 100.

  The transparent substrate in the present invention preferably has a transparency that does not hinder the transmission of image light when image light is projected onto a transmission screen. As specific transparency of the transparent substrate, for example, the visible light transmittance is preferably 80% or more, and more preferably 90% or more. In addition, about the visible light transmittance | permeability of a transparent base material, it can measure with the test method of the total light transmittance of the plastic-transparent base material based on JISK7361-1.

  As a material for the transparent substrate in the present invention, it is preferable to select a material having a predetermined visible light transmittance as described above. Specific examples thereof include resin films such as polyethylene terephthalate, polycarbonate, acrylic resin, cycloolefin resin, polyester resin, polystyrene resin, and acrylic styrene resin, and glass such as quartz glass, Pyrex (registered trademark), and synthetic quartz plate. In addition, the transparent base material in this invention may contain the ultraviolet absorber, the heat ray absorber, etc. other than the material mentioned above as needed.

  The thickness of the transparent substrate in the present invention preferably has a thickness that can support the light diffusion layer and the optical function layer described above. For example, the thickness of the transparent substrate is preferably in the range of 0.1 mm to 4.0 mm, and more preferably in the range of 1.0 mm to 2.0 mm. If the thickness of the transparent substrate is in the above range, desired support can be obtained, and if the transparent substrate is too thick, the occurrence of stray light and double images is suppressed. can do.

  The transparent substrate in the present invention may be, for example, a transfer substrate for transferring a transmission screen. In this case, the pattern layer 1, the complementary color layer 2, and the light shielding layer 3 can be disposed on the transfer substrate 7 as the transparent substrate 4, for example, as in the transmission screen 100 shown in FIG. . Further, the transmission screen 100 shown in FIG. 6A is designed to use the side on which the transfer base material 7 is disposed as the observation side of the transmission type screen. Layer 3 and complementary color layer 2 are laminated. Further, in the transmissive screen 100 shown in FIG. 6A, the light source side surface of the transmissive screen 100 is attached to the adherend 40 via the adhesive layer 9 as shown in FIG. 6B. Can be used. After the transmission screen 100 is attached to the adherend 40, the transfer substrate 7 is finally peeled off. As shown in FIGS. 6A and 6B, when the transparent base material 4 is used as the transfer base material 7, a release layer 8 for easily peeling the transfer base material 7 is provided. Also good. Further, as shown in FIGS. 6A and 6B, the observation side of the transmission screen 100 has a hard coat function as a surface functional layer 5 for protecting the observation side surface of the pattern layer 1. A surface protective layer 5a may be disposed. Since the description of the surface functional layer will be described later, description thereof is omitted here.

  When the transparent substrate is a transfer substrate, the material of the transfer substrate can be the same as the material described as the material of the transparent substrate, but from the viewpoint of easily peeling the transfer substrate, the predetermined It is preferable to use a flexible resin material.

  Further, when the transparent substrate is a transfer substrate, a release layer for easily peeling the transfer substrate may be provided. In addition, about a peeling layer, since it can be set as the thing of generally well-known, description here is abbreviate | omitted.

  The transmission screen of the present invention may be formed to be curved so as to have a concave curved surface whose center is depressed when viewed from the viewer side, that is, a curved surface that is convex toward the light source side, as necessary. . When obtaining such a curved transmissive screen, a transparent substrate having a function as a support for the transmissive screen is usually formed into a curved shape so as to have a curved surface, and then the curved transparent substrate is formed. A method of laminating the pattern layer, the light diffusion layer, and the metal thin film layer on the top can be employed. Examples of the method for forming the transparent substrate into a curved shape so as to have a curved surface include an insert molding method and an injection molding method. Note that the insert molding method and the injection molding method can be the same as the contents disclosed in, for example, Japanese Patent Application Laid-Open No. 2012-032513, and thus the description thereof is omitted here.

7). Surface Functional Layer The transmission screen of the present invention may have a surface functional layer as necessary. In the present invention, for example, as shown in FIG. 6B, the surface functional layer 5 can be disposed in the outermost layer on the observation side of the transmission screen 100.

  Examples of the function of the surface functional layer in the present invention include at least one function such as a hard coat function, an antiglare function, an antireflection function, an antistatic function, an ultraviolet absorption function, and an antifouling function. In the present invention, the surface functional layer is preferably a surface protective layer having a hard coat function.

  The surface protective layer in the present invention preferably has a predetermined hardness. As specific hardness, it is preferable that it is the hardness more than "HB" in the pencil hardness test prescribed | regulated by JISK600-5-4 (1994), for example. This is because the surface protective layer can exhibit a desired hard coat function.

  As the material for the surface protective layer in the present invention, for example, a material that exhibits a desired hard coat function and can protect the transmission screen of the present invention is preferable. The specific material of the surface protective layer preferably includes, for example, an ionizing radiation curable resin or a thermosetting resin. Here, the ionizing radiation curable resin refers to a resin containing at least an ionizing radiation curable resin monomer, an ionizing radiation curable resin oligomer, or a mixture thereof. In addition, when providing another function to the surface protective layer in this invention, an additive etc. can be suitably contained in a surface protective layer other than the said material.

  The thickness of the surface protective layer in the present invention is preferably, for example, a thickness that can exhibit a desired hard coat function, and can be appropriately adjusted according to the use of the transmission screen of the present invention. As a specific thickness of the surface protective layer, for example, it can be in the range of 0.05 μm or more and 2 μm or less.

8). Others The physical properties and applications of the transmission screen will be described below.

(1) Physical properties of transmission screen The transmission screen of the present invention preferably has a predetermined haze value. The specific haze value of the transmission screen is, for example, preferably in the range of 20% to 95%, and more preferably in the range of 30% to 60%. When the haze value of the transmissive screen has the above lower limit, it is possible to display a clear image when projecting image light. The haze value of the transmission screen can be appropriately adjusted according to, for example, the thickness of the light diffusion layer, the content of the particulate light diffusion material contained in the light diffusion layer, and the like. The haze value of the transmissive screen can be measured according to, for example, JIS K7136: 2000.

  The transmission screen of the present invention preferably has a predetermined transparency. As the specific transparency of the transmission screen, for example, the total light transmittance is preferably 60% or more, more preferably 80% or more, and particularly preferably 90% or more. In addition, the total light transmittance of a transmission type screen can be measured based on JISK7361-1: 1997, for example.

(2) Applications Examples of the transmission screen of the present invention include the following applications. There is an application as an advertisement that is attached to the inside or outside of the glass surface of the show window through an adhesive layer.

(3) Manufacturing Method The method for manufacturing the transmission screen of the present invention may be any method that can obtain the transmission screen having the predetermined configuration as described above, and generally adopts a known method. The description here is omitted.

B. Rear Projection Display Device The rear projection display device of the present invention includes an image light source that emits image light, and the above-described transmission screen that transmits the image light from the image light source and emits the image light to the observation side. Device.

  The description of the drawing of the rear projection type display device of the present invention can be the same as that in FIGS. 1A and 1B described above, and therefore the description thereof is omitted here.

  The rear projection type display device of the present invention has the above-described transmission type screen, so that both the visibility of the image displayed by the image light and the visibility of the pattern displayed by the pattern layer can be achieved. Play. The detailed description of the effects of the present invention can be the same as the contents described in the section “A. Transmission type screen”, and the description is omitted here.

  Hereinafter, the rear projection type display device of the present invention will be described in detail.

1. Transmission Screen The transmission screen of the present invention is the same as the member described in the section “A. Transmission Screen” above. That is, the transmission screen according to the present invention is a member that displays image by transmitting image light projected from the light source side to the observation side, and the image layer having the pattern and the light source side surface of the pattern layer. A complementary color layer and a layer having a light diffusion function, wherein the complementary color layer has a pattern exhibiting a color complementary to the color exhibited by the pattern of the pattern layer, and the pattern of the pattern layer and The pattern of the complementary color layer is a corresponding member so as to overlap in plan view.

  About each member which comprises the transmission type screen in this invention, since it can be made to be the same as that of the content described in the term of the said "A. transmission type screen", description here is abbreviate | omitted.

2. Image Light Source The image light source in the present invention is a member that emits image light.

  As the image light source in the present invention, a conventionally known light source, for example, a light emitting diode called LED, a small light source such as a pico projector using a laser, a single tube light source using a DMD, or the like is used. be able to. Note that the image light emitted from the image light source may be directly projected on the transmissive screen, or may be reflected by a mirror or the like and then projected on the transmissive screen.

  The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, and the present invention has any configuration that has substantially the same configuration as the technical idea described in the claims of the present invention and that exhibits the same effects. Are included in the technical scope.

[Example 1]
(Complementary color layer formation)
A general-purpose acrylic film (thickness 75 μm, size 200 mm × 300 mm) was prepared as a transparent substrate. A complementary color layer was formed by printing on the entire surface of the transparent substrate with an inkjet printer (UJF07151PLUS made by Mimaki Engineering).

(Formation of light shielding layer)
Next, on the entire surface of the obtained complementary color layer opposite to the transparent substrate, a light shielding layer constituent material in which titanium oxide is dispersed in resin is applied by a bar coating method to form a light shielding layer having a thickness of 5 μm. did. The obtained light shielding layer was a member exhibiting white. The total light transmittance of the light shielding layer was 90%.

(Formation of pattern layer)
A pattern similar to the pattern of the complementary color layer was printed on the surface of the obtained light shielding layer opposite to the complementary color layer using an ink jet printer to form a pattern layer. The pattern layer and the complementary color layer were arranged so that the pattern of the pattern layer and the pattern of the complementary color layer overlap in plan view.

(Formation of transmissive screen)
In this way, the transmission screen of the present invention was formed.
Here, the image data of the complementary color layer is generated by performing negative / positive inversion processing on the image layer image data with general-purpose graphic software.

(Manufacture of rear projection display devices)
A general-purpose projector (2000 ANSI lumen) was placed on the surface of the obtained transmissive screen on the complementary color layer side, and image light was projected.

[Example 2]
A rear projection display device was manufactured in the same manner as in Example 1 except that the thickness of the light shielding layer was 20 μm.

[Comparative Example 1]
A rear projection display device was manufactured in the same manner as in Example 1 except that a complementary color layer was formed on one surface of the transparent substrate and a light shielding layer and a pattern layer were formed on the other surface of the transparent substrate. .

[Comparative Example 2]
A rear projection display device was manufactured in the same manner as Comparative Example 1 except that general-purpose rubbed glass (thickness 3 mm) was used as the transparent substrate.

(Evaluation)
The rear projection type display devices obtained in Examples 1 and 2 and Comparative Examples 1 and 2 were evaluated. Specifically, observation was performed in a bright room (brightness of 700 lx) from the surface of the transmission screen opposite to the projector. As a result, in the case of the rear projection type display devices obtained in Examples 1 and 2, when the projector was OFF, the pattern was illuminated with room light, and the pattern formed by the pattern layer was visible. On the other hand, when the projector was turned on and the image was projected, the color of the image light was corrected by passing through the complementary color layer, and the image light imaged on the pattern layer could be correctly displayed without color shift. On the other hand, in the case of the rear projection type display device obtained in Comparative Example 1, when the image is observed at an angle of about 60 ° C. from the direction perpendicular to the transmissive screen, the image layer and the complementary color layer are misaligned. Resulting in a blurred color and reduced visibility. Further, in the case of the rear projection type display device obtained in Comparative Example 2, when the image layer and the complementary color layer are displaced from each other when observed from an oblique direction of about 30 ° C. from the vertical direction with respect to the transmissive screen, The color looked blurred and the visibility decreased.

1 ... pattern layer 2 ... complementary layer 3 ... Light-shielding layer 4 ... transparent substrate 10 ... image light source 20 ... observer 100 ... transmission screen L ₁₀ ... video image light L ₂₀ ... external light

Claims (8)

A transmissive screen that displays image by transmitting image light projected from the light source side to the observation side,
A pattern layer having a pattern;
A complementary color layer disposed on the light source side surface of the pattern layer;
A layer having a light diffusion function,
The complementary color layer has a pattern that exhibits a color that is complementary to the color that the pattern of the pattern layer exhibits,
The pattern of the pattern layer and the pattern of the complementary color layer correspond to overlap in plan view,
A transmission screen in which a distance between a surface of the pattern layer on the complementary color layer side and a surface of the complementary color layer on the pattern layer side is 20 μm or less.   The transmissive screen according to claim 1, wherein the complementary color layer is laminated so as to contact one surface of the pattern layer.   The transmissive screen according to claim 1, further comprising an intermediate layer between the pattern layer and the complementary color layer. The transmitted light that is projected from the light source side and transmitted to the observation side of the image light is such that the a ^* value and b ^* value of the L ^* a ^* b ^* color system satisfy the following formula (1). The transmission screen according to any one of claims 3 to 4.
| A ^{* 2} + b ^{* 2} | ≦ 5 Formula (1) The transmitted light that is projected from the light source side and transmitted to the observation side of the image light has an L ^* value variation of 3 or less in the L ^* a ^* b ^* color system. 5. The transmissive screen according to claim 1. The complementary colors exhibited by the pattern of the complementary color layer are the L ^* a ^* b ^* color system a ^* value of the color exhibited by the pattern of the pattern layer and the color of the color exhibited by the pattern of the complementary color layer. ^* a ^* b ^* sum of the ^{a *} value of color system is 5 or less, the color exhibited by the pattern of the pattern ^layer, L ^* a * ^{b *} and ^{b *} values of the color system, the complementary color layer The transmissive screen according to any one of claims 1 to 5, wherein a sum of a color represented by the pattern and a b ^* value of the L ^* a ^* b ^* color system is 5 or less.   The transmissive screen according to any one of claims 1 to 6, further comprising a light shielding layer having a semi-shielding function between the picture layer and the complementary color layer. An image light source that emits image light;
A rear projection display device comprising: the transmission screen according to any one of claims 1 to 7, wherein the image light from the image light source is transmitted and emitted to the observation side.