JP4877041B2 - Projector screen, projector screen manufacturing method, and projector - Google Patents

Description

  The present invention relates to a projector screen, a method for manufacturing the projector screen, and a projector including the projector screen.

2. Description of the Related Art Conventionally, a projector is known as a display device that can easily realize a large screen display. The projector system includes a front projector that assigns light split into three colors of red light (R), green light (G), and blue light (B) to each liquid crystal panel, and projects and displays an image on a reflective screen. A rear projector that displays an image on a transmissive screen is known.
In these projector systems, as the brightness has been increased, the opportunity for viewing in a bright room has increased. However, when a projected image (front projector) or a transmitted image (rear projector) is viewed in a bright environment, external light such as a fluorescent lamp is reflected on the screen, and the image cannot be sufficiently contrasted. For this reason, the screen which can cut off external light was calculated | required (for example, refer patent document 1). However, if extraneous light is filtered unnecessarily, coloring may occur in an image due to a light component remaining without filtering (that is, reflected external light), and display characteristics may be impaired.

  In addition, for the purpose of enabling a high-contrast and non-colored projection image in a bright illumination environment, the screen has an absorption wavelength region other than the center wavelength of the image light and is not absorbed by the screen. There has also been proposed a screen having a light absorption characteristic such that the color temperature range of light is 4500K to 7000K (that is, achromatic color) (Patent Document 2).

JP-A-5-216123 JP 2005-107375 A

The present inventor displays an image with good color reproducibility without being influenced by external light reflection even when viewing in a bright illumination environment by means other than the means described in Patent Document 2. As a result of extensive research to develop a screen that can be used, a colorant having an absorption wavelength region of 470 nm to 510 nm and a colorant having an absorption wavelength region of 570 nm to 610 nm are used in combination. We found that we can solve the problem.
In addition to the above colorant, when a colorant having an absorption wavelength range of 400 nm to 440 nm is used in combination or a specific printing method is used, color reproduction is not affected by external light reflection. It has also been found that an image with better characteristics can be displayed.
The present invention is based on these findings.

  Therefore, in the present invention, a colorant having an absorption wavelength region in the range of 470 nm to 510 nm and a colorant having an absorption wavelength region in the range of 570 nm to 610 nm are uniformly distributed over the entire image display region of the screen base material. The present invention provides a projector screen characterized by including the projector screen.

In a preferred embodiment of the projector screen of the present invention, a colorant having an absorption wavelength region of 400 nm to 440 nm is further carried on the entire image display region of the screen base material.
In another preferred aspect of the projector screen of the present invention, at least one of the colorants is included in a state of being uniformly distributed over the entire image display region of the screen base material.
In still another preferred aspect of the projector screen according to the present invention, at least one of the colorants is included in a non-uniformly distributed state over the entire image display region of the screen base material. In this aspect, more preferably, the concentration of the colorant in a non-uniformly distributed state gradually increases concentrically from the center of the image display region to the peripheral portion.

In still another preferred embodiment of the projector screen according to the present invention, each colorant is carried as a dot-like ink layer that is separated from each other, or carried as a dot-like ink layer that at least partially overlaps.
In still another preferred embodiment of the projector screen according to the present invention, the colorant is supported as a plurality of solid ink layers containing each colorant separately.
In still another preferred embodiment of the projector screen of the present invention, the projector screen is carried as a single solid ink layer containing each colorant simultaneously.
In still another preferred aspect of the projector screen of the present invention, the image light is reflected and displayed or the image light is transmitted and displayed.

  The present invention also relates to a front projector or a rear projector including the projector screen.

  The present invention relates to an inkjet recording ink composition containing a colorant having an absorption wavelength region of 470 nm to 510 nm and an inkjet recording ink composition containing a colorant having an absorption wavelength region of 570 nm to 610 nm. The present invention also relates to a method for manufacturing a projector screen, characterized by discharging the image onto an image display area of a screen base material.

In a preferred embodiment of the production method of the present invention, an ink composition for ink jet recording containing a colorant having an absorption wavelength region of 400 nm to 440 nm is further discharged onto the image display region of the screen substrate by the ink jet recording method.
In another preferred embodiment of the production method of the present invention, at least one of the ink jet recording ink compositions is ejected in a state of being uniformly distributed over the entire image display region of the screen base material.
In still another preferred embodiment of the production method of the present invention, at least one of the ink jet recording ink compositions is discharged in a state of being non-uniformly distributed over the entire image display region of the screen base material. In this aspect, more preferably, the concentration of the colorant discharged in a non-uniformly distributed state gradually increases concentrically in the direction from the center portion to the peripheral portion of the image display region.
In still another preferred embodiment of the production method of the present invention, the ink compositions for inkjet recording described above are formed so as to form dot ink layers spaced apart from each other, or at least partially overlapping dot ink layers. Discharge to form.
In still another preferred embodiment of the production method of the present invention, each of the ink jet recording ink compositions is ejected as a solid coating layer in an arbitrary order.

The present invention provides an ink composition for ink jet recording containing a colorant having an absorption wavelength region in the range of 470 nm to 510 nm and a colorant having an absorption wavelength region in the range of 570 nm to 610 nm. The present invention also relates to a method for manufacturing a projector screen, which is characterized by discharging into a region.
In a preferred embodiment of the production method of the present invention, an ink composition for ink jet recording further containing a colorant having an absorption wavelength region at 400 nm to 440 nm is ejected.
In another preferred aspect of the production method of the present invention, the ink composition for ink jet recording is discharged so that the concentration of the colorant is uniformly distributed over the entire image display region of the screen base material.
In still another preferred embodiment of the production method of the present invention, the ink composition for inkjet recording is ejected so that the concentration of the colorant is unevenly distributed over the entire image display region of the screen base material. To do. In this aspect, more preferably, the concentration of the colorant gradually increases concentrically in the direction from the center portion to the peripheral portion of the image display region.

  Further, the present invention is 2 selected from the group consisting of a colorant having an absorption wavelength region at 400 nm to 440 nm, a colorant having an absorption wavelength region at 470 nm to 510 nm, and a colorant having an absorption wavelength region at 570 nm to 610 nm. An ink jet recording ink composition containing a kind of colorant and an ink jet recording ink composition containing another colorant not contained in the ink jet recording ink composition are screened by an ink jet recording method. The present invention also relates to a method for manufacturing a projector screen, which is characterized by discharging to a video display area of a substrate.

In a preferred aspect of the production method of the present invention, at least one of the ink jet recording ink compositions is ejected in a state of being uniformly distributed over the entire image display region of the screen base material.
In another preferred aspect of the production method of the present invention, at least one of the ink jet recording ink compositions is discharged in a state of being non-uniformly distributed over the entire image display region of the screen base material. In this aspect, more preferably, the concentration of the colorant discharged in a non-uniformly distributed state gradually increases concentrically in the direction from the center portion to the peripheral portion of the image display region.
In still another preferred embodiment of the production method of the present invention, each ink composition for ink jet recording is formed so as to form dot ink layers spaced apart from each other, or at least partially overlapping dot ink layers. It discharges so that it may form.
In still another preferred embodiment of the production method of the present invention, each of the ink compositions for inkjet recording is ejected as a solid coating layer in an arbitrary order.

In the present specification, “colorant having an absorption wavelength region in the range of 470 nm to 510 nm” means that most of the absorption wavelength region indicated by the colorant exists in “470 nm to 510 nm”. Further, “mostly” means not only the case where the total absorption region exists in “470 nm to 510 nm” as shown in FIG. 1A, but also as shown in FIGS. 1B to 1D. When the total absorption region of the colorant is converted into an area, the absorption wavelength region (A) of “470 nm to 510 nm” has an absorption wavelength region (B) of less than “470 nm” and an absorption wavelength region of more than “510 nm” ( C) and the total of the absorption wavelength region (A) of “470 nm to 510 nm” are 70% or more, that is, the following calculation formula (1):
S = [A / (A + B + C)] × 100 (1)
This means that the ratio (S) calculated in (1) is 70% or more.
Similarly, “colorant having an absorption wavelength region in 570 nm to 610 nm” means that most of the absorption wavelength region indicated by the colorant is present in “570 nm to 610 nm”. When the absorption region is converted into an area, it means that 70% or more of the absorption region exists in the wavelength region.
In addition, “colorant having an absorption wavelength region at 400 nm to 440 nm” means that most of the absorption wavelength region indicated by the colorant is present at “400 nm to 440 nm”, and “almost” means total absorption. When a region is converted into an area, it means that 70% or more of the region exists in the wavelength region.

As shown in FIG. 2, the projector screen of the present invention is a colorant having an absorption wavelength region in the range of 470 nm to 510 nm, that is, the wavelength region of blue light (B) (curve B in FIG. 2) and green light (G). A colorant having an absorption wavelength region in the region [curve BG in FIG. 2] (hereinafter sometimes referred to as “colorant BG”), and 570 nm to 610 nm. Colorant having an absorption wavelength region, that is, an absorption wavelength region in a region between the wavelength region of green light (G) [curve G in FIG. 2] and the wavelength region of red light (R) [curve R in FIG. A colorant having the [curve GR in FIG. 2] (hereinafter sometimes referred to as “colorant GR”) is carried in a state where each colorant is uniformly or non-uniformly distributed over the entire image display region of the screen substrate. Spectral components for video display KazuSatoshi, red light (R), the light components other than the three colors] green light (G) and blue light (B) can be completely absorbed. Therefore, even when viewing in a bright illumination environment, an image with good color reproducibility can be displayed without being affected by external light reflection.
In addition to the colorant BG and the colorant GR, the projector screen of the present invention has a colorant having an absorption wavelength region in the range of 400 nm to 440 nm, that is, blue light (B), as shown in FIG. A colorant having an absorption wavelength region in the region of lower wavelength than the wavelength region [curve B in FIG. 2] (curve V in FIG. 2) [hereinafter sometimes referred to as “colorant V”] If the image display area is uniformly or non-uniformly distributed throughout the image display area, the image display spectral components [that is, three colors of red light (R), green light (G), and blue light (B) are displayed. ] Can be absorbed more completely, so that even when viewing in a bright lighting environment, it is possible to display an image with better color reproducibility without being affected by external light reflection. it can.

[screen]
A typical embodiment of a projector screen according to the present invention is schematically shown in FIGS.
FIG. 3 shows a dot-like ink layer 42 containing a colorant BG having an absorption wavelength region at 470 nm to 510 nm and 570 nm to 610 nm on the entire surface of the image display region on the reflective surface side of the reflective screen substrate 41. FIG. 3 is a schematic cross-sectional view of a front projector screen 40 that uniformly and regularly includes a dot-like ink layer 43 containing a colorant GR having an absorption wavelength region. The dot group of one dot-like ink layer 42 is distributed uniformly and distributed over the entire image display area of the screen base material independently of the dot group of the other dot-like ink layer 43, and at the same time, The dot group of the dot-like ink layer 43 is distributed uniformly and distributed over the entire image display area of the screen base material independently of the dot group of the other dot-like ink layer 42. Further, as shown in FIG. 3, the dot-like ink layer 42 and the dot-like ink layer 43 can be provided separately from each other, and the dot-like ink layers partially or entirely overlap each other. It can also be provided. Furthermore, it is preferable that the respective dot-like ink layers are regularly arranged. Alternatively, the dot-like ink layers do not have to be exactly regular, and can be randomly arranged.

In the reflective screen base material 41, one or both of the dot group of the dot-like ink layer 42 and the dot group of the dot-like ink layer 43 are distributed non-uniformly over the entire image display region of the screen base material. Can be included in the state. Here, the non-uniformly distributed state means that, for example, the concentration of the colorant gradually changes concentrically (that is, continuously or stepwise) in the direction from the central portion to the peripheral portion of the image display region. Means, for example, it becomes thinner or preferably darker. The means for changing the concentration of the colorant is not particularly limited. For example, a method of changing the dot diameter (discharge amount), a method of changing the density per unit of the same diameter dot (same discharge amount dot), or the colorant content And a method using different ink compositions.

  In addition to the dot-like ink layer 42 and the dot-like ink layer 43, a dot-like ink layer (not shown) containing a coloring agent V having an absorption wavelength region at 400 nm to 440 nm is applied to the reflective screen substrate 41. It can also be carried uniformly, regularly or randomly, or non-uniformly on the surface of the entire image display area on the reflective surface side. The dot-shaped ink layer containing the colorant V can be provided not only separately from the dot-shaped ink layer 42 and the dot-shaped ink layer 43 as shown in FIG. It can also be provided so as to partially or entirely overlap each other.

  In some cases, a protective layer may be provided on the dot-shaped ink layer 42 and the dot-shaped ink layer 43 (further, a dot-shaped ink layer containing a colorant V in some cases), or one side of the reflective screen substrate 41 may be provided. On the protective layer provided on the surface, the dot-like ink layer 42 and the dot-like ink layer 43 (further, the dot-like ink layer containing the colorant V in some cases) may be provided. By providing the protective layer, the dot-shaped ink layer 42 and the dot-shaped ink layer 43 (further, the dot-shaped ink layer containing the colorant V in some cases) can be closely supported on the reflective screen substrate 41. . The dot-like ink layer 42 does not contain a colorant other than the colorant BG, and the dot-like ink layer 43 contains no colorant other than the colorant GR. Similarly, a color ink other than the colorant V is not contained in the dot-like ink layer containing the colorant V.

  A dot containing a colorant BG having an absorption wavelength region of 470 nm to 510 nm on one side surface of the transmission type screen base material instead of the reflection type screen base material 41 shown in FIG. A screen for a rear projector can be obtained by supporting the ink-like ink layer and the dot-like ink layer containing the colorant GR having an absorption wavelength region at 570 nm to 610 nm independently from each other as shown in FIG. it can. In some cases, a dot-like ink layer (not shown) containing the colorant V can be further provided. These dot-like ink layers can be included in a state of being uniformly or non-uniformly distributed over the entire image display region of the screen base material. In these cases, the surface on which the dot-like ink layer is provided is either one of the surfaces of the transmissive screen substrate (that is, either the image light incident side surface or the image light transmission side surface) or both. It can be the surface. When providing a dot-like ink layer on both surfaces of the transmission type screen substrate, a dot-like ink layer containing a colorant BG (in some cases, a dot-like ink layer further containing a colorant V) is provided on one surface. In addition, a dot-like ink layer containing the colorant GR (in some cases, a dot-like ink layer containing the colorant V may be provided) on the other surface. In addition, a protective layer may be provided on the dot-shaped ink layer, or the dot-shaped ink layer may be provided on the protective layer provided on one or both surfaces of the transmissive screen substrate.

  FIG. 4 shows an ink layer 52 containing a colorant BG and an ink layer 53 containing a colorant GR on the surface of the entire image display region on the reflective surface side of the reflective screen substrate 51 in order. It is typical sectional drawing of the screen 50 for front projectors included. It is also possible to provide the colorant GR-containing ink layer 53 on the reflective surface side surface of the reflective screen substrate 51 and then provide the colorant BG-containing ink layer 52 thereon. The colorant BG-containing ink layer 52 and the colorant GR-containing ink layer 53 are preferably provided in a state where they are in direct contact with each other without being separated.

The colorant concentration of one or both of the ink layer 52 containing the colorant BG and the ink layer 53 containing the colorant GR is uniformly distributed over the entire image display region of the screen base material or nonuniformly. It can be included in a distributed state. Here, the non-uniformly distributed state means that the concentration of the colorant is, for example, gradually (that is, continuously or stepwise) concentrically in the direction from the center to the periphery of the image display region. It means to change, for example, to become thinner or preferably darker. The means for changing the concentration of the colorant is not particularly limited. For example, when solid printing is performed by an inkjet recording method, a method for changing the discharge amount per unit area, or an ink composition having a different colorant content. Can be mentioned.

  In addition to the colorant BG-containing ink layer 52 and the colorant GR-containing ink layer 53, an ink layer (not shown) containing a colorant V having an absorption wavelength region at 400 nm to 440 nm is used as a reflective screen substrate. On the surface of the entire video display area 51 on the reflective surface side 51, it can be supported and included in any order.

  When using the three colorants BG, colorant GR and colorant V, an ink layer containing two of the colorants and an ink containing the remaining one colorant It can also be supported in a two-layer structure with a layer. When three types of colorants are carried in a two-layer structure, the colorant concentrations in both layers should be distributed uniformly or non-uniformly over the entire image display area of the screen substrate. Can do.

  In some cases, the colorant BG-containing ink layer 52, the colorant GR-containing ink layer 53, and in some cases, further on the colorant V-containing ink layer (the order of stacking on the substrate 51 is arbitrary) or both A protective layer is provided between the colorant BG-containing ink layer 52, the colorant GR-containing ink layer 53, and optionally further on a protective layer provided on one surface of the reflective screen substrate 51. In addition, a colorant V-containing ink layer (arbitrary order of lamination on the substrate 51) may be provided. The colorant BG-containing ink layer 52 does not contain a colorant other than the colorant BG, and the colorant GR-containing ink layer 53 does not contain a colorant other than the colorant GR. Similarly, the ink layer containing the colorant V contains no colorant other than the colorant V.

  A transmissive screen substrate is used instead of the reflective screen substrate 51 shown in FIG. 4, and an ink layer containing a colorant BG and a colorant GR are contained on one surface of the transmissive screen substrate. A screen for a rear projector can also be obtained by providing an ink layer as shown in FIG. In some cases, an ink layer (not shown) containing the colorant V can be further provided. In these cases, the surface on which the ink layer is provided is one of the surfaces of the transmissive screen substrate (that is, either the image light incident side surface or the image light transmission side surface) or both surfaces. can do. When the ink layer is provided on both surfaces of the transmissive screen substrate, a colorant BG-containing ink layer (optionally, a colorant V-containing ink layer) is provided on one surface, and the colorant GR-containing ink is provided on the other surface. A layer (optionally, a colorant V-containing ink layer) may also be provided. In addition, a protective layer may be provided on both ink layers, or the two ink layers may be provided on a protective layer provided on one or both surfaces of the transmissive screen substrate.

  FIG. 5 shows a front projector screen 60 including an ink layer 64 containing a colorant BG and a colorant GR on the entire surface of the image display region on the reflective surface side of the reflective screen base 61. It is typical sectional drawing. In some cases, the ink layer 64 may contain a colorant V having an absorption wavelength region of 400 nm to 440 nm. The colorant concentration of the ink layer 64 may be uniform or non-uniform over the entire image display region of the screen substrate. The non-uniform density means, for example, a gradual (that is, continuous or stepwise) change concentrically from the center of the video display area to the peripheral edge. Or preferably, it means thickening. The means for changing the concentration of the colorant is not particularly limited. For example, when solid printing is performed by an inkjet recording method, a method for changing the discharge amount per unit area, or an ink composition having a different colorant content. Can be mentioned.

  In some cases, a protective layer may be provided on the ink layer 64, or the ink layer 64 may be provided on a protective layer provided on one surface of the reflective screen substrate 61. The ink layer 64 contains no colorant other than the colorant BG and the colorant GR.

  Instead of the reflective screen substrate 61 shown in FIG. 5, a transmissive screen substrate is used, and an ink layer containing the colorant BG and the colorant GR is formed on one surface of the transmissive screen substrate. By carrying it as shown in FIG. 5, a rear projector screen can be obtained. In this case, the surface on which the ink layer is provided is either one of the surfaces of the transmissive screen substrate (that is, either the image light incident side surface or the image light transmissive side surface) or both surfaces. be able to. Further, a protective layer may be provided on the ink layer, or the ink layer may be provided on the protective layer provided on one or both surfaces of the transmissive screen substrate.

  The colorant BG, the colorant GR, and optionally the colorant V are formed in a dot shape as shown in FIG. 3 on the entire surface of the image display region of the reflective screen base material or the transmissive screen base material of the present invention. It can also be carried by a combination of an ink layer and a solid ink layer as shown in FIG.

[Colorant]
In the present invention, a colorant having an absorption wavelength region between 470 nm and 510 nm, that is, a colorant having an absorption wavelength region in the region between blue light (B) and green light (G) [colorant BG], and A colorant having an absorption wavelength region at 570 nm to 610 nm, that is, a colorant [colorant GR] having an absorption wavelength region in a region between green light (G) and red light (R) is used. The colorant BG and the colorant GR are both known, and can be synthesized by a known method or a commercially available product can be used. In the present invention, in addition to the colorant BG and the colorant GR, a colorant having an absorption wavelength region in the range of 400 nm to 440 nm, that is, an absorption region in a wavelength region lower than the wavelength region of blue light (B). A colorant (colorant V) having a wavelength region can also be used. The colorant V is known and can be synthesized by a known method or a commercially available product can be used.

[Screen base material]
A reflective screen base material used for a screen for a front projector can be formed from a light-reflective material normally used as this type of screen base material. In addition to the colorant BG-containing ink layer and the colorant GR-containing ink layer (and, in some cases, the colorant V-containing ink layer), the reflective screen base material has a known functional layer such as a light diffusion layer. Can be provided.
A transmissive screen substrate used for a screen for a rear projector can be formed from a light transmissive material (for example, glass or transparent plastic) that is usually used as this type of screen substrate. In addition to the colorant BG-containing ink layer and the colorant GR-containing ink layer (in some cases, the colorant V-containing ink layer), this transmissive screen substrate has a known functional layer such as a light diffusion layer. Can be provided.

[Method for producing screen substrate]
The screen base material includes an ink composition for ink jet recording containing a colorant (colorant BG) having an absorption wavelength region at 470 nm to 510 nm, and a colorant (colorant GR) having an absorption wavelength region at 570 nm to 610 nm. And an ink composition for ink jet recording, and optionally a colorant (colorant V) having an absorption wavelength region of 400 nm to 440 nm is ejected onto an image display region of a screen substrate by an ink jet recording method. be able to.

  Each of the ink compositions described above can be independently ejected in a uniformly distributed state over the entire image display region of the screen base material, or can be ejected in a non-uniformly distributed state, and in the form of dots. Or it can discharge in a solid coating shape. In the method for producing a screen substrate according to the present invention, an ink composition for ink jet recording containing the colorant BG, the colorant GR, and optionally the colorant V alone, and substantially free of other colorants. Alternatively, an ink composition for ink jet recording containing two or three of Colorant BG, Colorant GR, and optionally Colorant V is used. In addition, two or more ink-jet recording ink compositions containing the colorant BG, the colorant GR, and optionally the colorant V at different concentrations can also be used.

[Projector system]
Next, a liquid crystal projector system which is an example of a projector system provided with the screen of the present invention will be described.
FIG. 6 is a schematic configuration diagram of the projector 30, and the projector 30 of the aspect shown in FIG. 6 is a transmissive liquid crystal light for each of different colors of red light (R), green light (G), and blue light (B). This is a three-plate color liquid crystal projector provided with a valve. The projector 30 includes an illumination device 1, a light source 2, fly-eye lenses 3 and 4 as uniform illumination means, dichroic mirrors 13 and 14, reflection mirrors 15, 16, and 17, and liquid crystal light valves 22 and 23 as light modulation means. 24, a cross dichroic prism 25, and a projection lens 26 as projection means. Moreover, the screen 40 (refer FIG. 3) by this invention is also provided as a to-be-projected body of the image light projected from the projector 30. FIG. The projector 30 and the screen 40 constitute a projector system of the present invention. Instead of the screen 40, the screen 50 shown in FIG. 4 or the screen 60 shown in FIG. 5 may be used.

  The illumination device 1 includes a light source 2 and fly-eye lenses 3 and 4. The light source 2 includes a lamp 7 such as a high-pressure mercury lamp and a reflector 8 that reflects the light from the lamp 7. Further, as uniform illumination means for making the illuminance distribution of the light source light uniform in the liquid crystal light valves 22, 23, 24 that are the illuminated areas, the first fly-eye lens 3 and the second fly-eye lens from the light source 2 side. 4 are installed sequentially. Here, the first fly-eye lens 3 forms a plurality of secondary light source images, and the second fly-eye lens 4 functions as a superimposing lens that superimposes them at the light valve position. In some cases, a condenser lens for superimposing the secondary light source image may be arranged at the position of the second fly-eye lens 4 or at the subsequent stage.

The dichroic mirror 13 of the blue light, green light reflection, transmits red light L _R of the light beam from the light source 2, is intended to reflect the blue light L _B and the green light L _G. The red light _{LR that} has passed through the dichroic mirror 13 is reflected by the reflection mirror 17 and enters the liquid crystal light valve 22 for red light. Meanwhile, among the color light reflected by the dichroic mirror 13, the green light L _G is reflected by the dichroic mirror 14 for reflecting green light, is incident on the green light liquid crystal light valve 23. On the other hand, the blue light L _B dichroic mirror 14 also passes through the relay lens 18, reflecting mirror 15, a relay lens 19, reflecting mirror 16, is incident on the liquid crystal light valve 24 for blue light through a relay system 21 comprising a relay lens 20 The

The three color lights (color image light) modulated by the liquid crystal light valves 22, 23, and 24 are incident on the cross dichroic prism 25. This prism has a structure in which four right-angle prisms are bonded together, and a dielectric multilayer film that reflects red light and a dielectric multilayer film that reflects blue light are formed in a cross shape on the inner surface thereof. By these dielectric multilayer films, three color lights are combined to form light (video light) representing a color image. The synthesized light is projected onto a screen 27 by a projection lens 26 which is a projection optical system, and an enlarged image is displayed.

[Rear projector]
Next, an example of a rear projector including the transmission screen of the present invention will be described with reference to FIG.
FIG. 7 is a schematic configuration diagram of the projector 100. The rear projector 100 of the aspect shown in FIG. 7 is a rear projection type projector 55 that transmits and emits image light and the present invention for displaying a projected image. And a reflection mirror 56 for reflecting the image light emitted from the rear projection projector 55 and guiding it to the transmission screen 65. The rear projection projector 55 includes a light source device, an image forming optical system, a projection lens, and the like (not shown), and generates and emits projection light. The projected light reaches the reflection mirror 56 while spreading, is reflected by the reflection mirror 56, and reaches the transmission screen 65. In this transmissive screen 65, only the original projection light can be transmitted substantially parallel to the optical axis 60a and displayed as an image.

  The projector screen according to the present invention can be used as a reflective screen for projecting and displaying an image on a front projector, or as a transmissive screen for transmitting and displaying an image on a rear projector.

It is typical explanatory drawing which shows the absorption wavelength area | region of 3 types of coloring agents used by this invention. Schematic explanatory drawing showing each wavelength region of blue light (B), green light (G), and red light (R), and each wavelength region of colorant BG, colorant GR, and colorant V used in the present invention. It is. It is typical sectional drawing which shows the structure of the reflective screen by this invention which carry | supports the coloring agent BG containing dot-shaped ink layer and the coloring agent GR containing dot-shaped ink layer on the surface of a reflective screen base material. FIG. 3 is a schematic cross-sectional view showing the structure of a reflective screen according to the present invention in which a colorant BG-containing ink layer and a colorant GR-containing ink layer are stacked and supported on the surface of a reflective screen substrate. It is typical sectional drawing which shows the structure of the reflective screen by this invention which carry | supports the coloring agent BG and the coloring agent GR containing ink layer on the surface of a reflective screen base material. It is a schematic block diagram of the front projector system provided with the reflective screen of this invention. It is a schematic block diagram of the rear projector system provided with the transmission type screen of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Illuminating device; 2 ... Light source; 3, 4 ... Fly eye lens;
7 ... lamp; 8 ... reflector;
13, 14 ... Dichroic mirror; 15, 16, 17 ... Reflection mirror;
18, 19, 20 ... relay lens; 21 ... relay system;
22, 23, 24 ... liquid crystal light valve; 25 ... cross dichroic prism; 26 ... projection lens; 30 ... front projector;
40, 50, 60 ... screen; 41, 51, 61 ... reflective screen substrate;
42, 43 ... dot ink layer; 52, 53, 64 ... ink layer;
55 ... rear projection type projector; 56 ... reflection mirror; 60a ... optical axis;
65: transmissive screen; 100: rear projector.

Claims (4)

(1) a colorant having an absorption wavelength region at 470 nm to 510 nm;
(2) A colorant having an absorption wavelength region at 570 nm to 610 nm is supported on the entire image display region of the screen base material ,
Including at least one of the colorants in a non-uniformly distributed state throughout the image display area of the screen substrate;
The projector screen according to claim 1, wherein the concentration of the colorant in the non-uniformly distributed state gradually increases concentrically from the center portion to the peripheral portion of the image display region .
[Here, the absorption wavelength region is the range specified in the above (1) and (2) when the total absorption region of each of the colorants in (1) and (2) is converted into an area] The absorption wavelength region is 70% or more with respect to the total absorption wavelength region of the respective colorants (1) and (2). ]
The projector screen according to claim 1, wherein each colorant is carried as a dot-like ink layer spaced apart from each other or as a dot-like ink layer at least partially overlapping. The projector screen according to claim 1, which is carried as a plurality of solid ink layers containing each colorant separately from each other. The projector screen according to claim 1, which is carried as a single solid ink layer containing each colorant simultaneously.

Images