JPH0792465A - Transmission color image display device - Google Patents

Abstract

PURPOSE:To enhance the utilization factor of the ultraviolet rays of an ultraviolet light source, in a transmission color image display device exciting phosphors for B, G and R to emit light with the ultraviolet rays from the ultraviolet light source. CONSTITUTION:The phosphors for B, G and R 30, 31 and 32 of a light emitting member 33 are surrounded by a black matrix 34 reflecting the ultraviolet rays respectively. The black matrix 34 is irradiated with a part of the ultraviolet rays projected from the ultraviolet light source 26 and a reflection member 27 and the part is reflected by the black matrix 34, then, transmits a film 29 for allowing the ultraviolet rays to transmit and reflecting light in a visible region and is returned to the ultraviolet light source 26 and the reflection member 27. Then, the optical path of a part is changed to irradiate the phosphors for B, G and R 30, 31 and 32 of the light emitting member 33 respectively. Thus, the utilization factor of the ultraviolet rays is enhanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission type color image display device for presenting an image produced on an image display device such as a liquid crystal by direct viewing or projection.

[0002]

2. Description of the Related Art A transmission type color image display device using an image display element such as a liquid crystal has a structure as shown in FIG. 4 (for example, Tani et al., "High image quality active matrix liquid crystal color display", 1985). November 14, Television Engineering Society Technical Report ED905, etc.).

In FIG. 4, an image display device 7 having a structure in which a liquid crystal layer 2 is sandwiched between glasses 3 and 4 above a linear light source 1 and polarizing plates 5 and 6 are arranged outside the glasses 3 and 4, respectively. And a color filter 8 for presenting three primary colors of blue (hereinafter referred to as B), green (hereinafter referred to as G), and red (hereinafter referred to as R) between the liquid crystal layer 2 and the glass 3. Placed (color filter 8 on the outside of the polarizing plate 5)
Some have a structure).

In order to improve the color purity of the colored light from the color filter 8, the light source 1 has a three-wavelength band emission type fluorescent lamp having a spectral characteristic of three peak lights of B, G and R as shown in FIG. Is used. Further, the spectral transmission characteristic of the color filter 8 is a characteristic corresponding to each peak light of B, G, and R from the light source 1, as shown in FIG. The image display element 7 has a shutter function of changing its transmittance according to an image signal to be displayed and blocking the irradiation light from the light source 1. An image is presented by transmitting or blocking light.

[0005]

In such a conventional transmissive color image display device, the transmissivity of the image display element 7 is about 10% to 15% in the visible range as shown in FIG.
The transmittance of the color filter 8 is about 60% to 80% at each peak wavelength of B, G, and R as shown in FIG.
Therefore, the light presented as an image through both the image display element 7 and the color filter 8 is 6% to 12% of the light emitted from the light source 1.

In recent years, one of the requirements for using a transmission type color image display device outdoors or under bright illumination light is to increase the brightness of the screen (increase the brightness). In order to realize this, it is sufficient to increase the transmittance of the liquid crystal layer 2, the polarizing plates 5 and 6, the color filter 8 and the like in the image display element 7. However, at the current technical level, it takes a lot of time and cost for technological development to increase the transmittance by several percent, and therefore, as a method for solving the above-mentioned problems, generally, illumination is performed from the rear surface of the transmissive color image display device. The actual situation is to increase the light quantity (luminance) of the backlight, that is, by using a large-capacity light source or by turning on the light source with an overload.

For this reason, the light source and the backlight are strict.
New specifications are always required. Here, the light source 1
Inner surface of the bulb when a three-wavelength emission type fluorescent lamp is used for
Considering the state of, the phosphor for B (for example,
-Ropium activated barium aluminate, magnesium: B
aMg₂ Al₁₆O₂₇; Eu²⁺Etc.) and G phosphor (Tato)
For example, television activated cerium aluminate, magnesium
Mu: CeMgAl₁₁O ₁₉; Tb³⁺Etc.) and fluorescence for R
Body (eg, europium-activated yttrium oxide: Y
₂ O₃ ; Eu³⁺3 types of phosphors are applied.
Therefore, we optimized the mixture ratio of this phosphor and excited it with ultraviolet light.
As a result, white light is emitted.

There is no problem if the B, G, and R phosphors are applied without interfering (overlapping) with each other. However, three types of phosphors are applied in a multilayered structure for the purpose of use. There is a problem in that the conversion efficiency of each phosphor into visible light is reduced and the emission efficiency as a light source is reduced.

Further, the visible light emitted from the light source 1 is not always constant in the irradiation direction but is diffused. Therefore, when the image display element 7 is a transmissive liquid crystal element, the visible light described above is used. Even if the light is irradiated onto the image display element 7, due to the relationship of the incident angle characteristics, the light emitted in a state of being perpendicular or nearly vertical to the image display element 7 easily enters the image display element 7, Not only is it hard to enter,
Color misregistration may occur or shutter function may deteriorate, that is, image quality may deteriorate due to leaked light.

For this reason, the inventors of the present application have previously proposed an illumination device (backlight) for a transmissive color image display device described in Japanese Patent Application Laid-Open No. 1-307790 as an invention for solving the above problem.

The outline of the above invention is shown in FIGS. 8 and 9. In FIG. 8 and FIG. 9, the direct ultraviolet rays from the light source 9 and the reflected ultraviolet rays from the reflecting member 10 are both emitted from the light emitting member 11.
Is irradiated. The light-emitting member 11 has a plurality of phosphor dots for blue (B), green (G), and red (R) arranged in order, and each phosphor dot is irradiated with the ultraviolet light to generate a red color. Lights of green, green, and blue are constantly emitted.

Each color light emitted from the light emitting member 11 is condensed and irradiated by the micro Fresnel lens 14 of the light matching member 13 and the light shielding plate 15, and then the image display element 12 (in the present invention, a liquid crystal is taken as an example). It is efficiently irradiated. In addition, the light shielding plate 15 is B, G,
It has a role of separating the irradiation lights from the R phosphor dots so as not to interfere with each other.

Of the image display elements 12 facing these, by opening only the element of the image to be displayed,
A color image by a combination of blue, green, and red is presented on the image display element 12. This eliminates the need for a color filter, and the amount of light can be increased accordingly.
In addition, since the blue, green, and red phosphors are separated and arranged independently in the form of dots or stripes, different phosphors do not overlap, and the amount of light can be increased by that amount. The luminous efficiency of the backlight can be improved and the brightness of the presented image can be made brighter.

In the structure shown in FIGS. 8 and 9, a plurality of B, G, and G arranged in order in the light emitting member 11 are provided in order to prevent interference between adjacent phosphors when emitting light and to improve the contrast of each color light. A black matrix 1 in which each phosphor dot of R is usually made of Cr (chrome) or the like.
The ultraviolet rays emitted from the light source 9 are separated by
Both the light emitting member 11 and the black matrix 16 are irradiated. Therefore, the ultraviolet light applied to the light emitting member 11 is converted into visible light by the phosphor of the light emitting member 11, but the ultraviolet light applied to the black matrix 16 is absorbed as it is and does not contribute to the conversion into visible light. This is a factor that reduces the utilization efficiency of the ultraviolet light emitted from the light source 9.

The present invention solves the above-mentioned problems and has a high brightness without deteriorating the utilization efficiency of ultraviolet rays of a light source.
Moreover, it is an object of the present invention to provide a transmissive color image display device in which there is no color shift of the luminescent color and unevenness of brightness on the luminescent surface.

[0016]

In order to solve the above-mentioned problems, the transmission type color image display device of the present invention has the following constitution.

(1) Of the ultraviolet rays, a light source having the maximum radiation power at a wavelength of 253.7 nm, a reflecting member which partially surrounds the light source and reflects a part of the ultraviolet rays from the light source, and the light source A light emitting member formed of a phosphor dot or a phosphor stripe that emits blue light, green light, and red light, respectively, which is provided on the upper part of the light source, and which emits blue light, green light, and red light by ultraviolet light emitted from a light source and ultraviolet light reflected by the reflection member; An image display element having a function of transmitting or blocking the irradiation light from the light emitting member and provided on the light emitting member, and further black that optically shields each phosphor dot or phosphor stripe of the light emitting member. The member is surrounded by a matrix, and the black matrix is composed of a member that reflects ultraviolet rays.

(2) The light emitting member and the black matrix are
The glass substrate is formed on the surface of the glass substrate on the image display element side by any one of coating, printing and vapor deposition, and the ultraviolet light transmitting / visible light reflecting film is formed on the surface of the glass substrate on the light source side.

(3) Ultraviolet transmission formed on the glass substrate
The visible light reflection film is set to a wavelength of 450 nm ± 50 nm (blue:
B), 530 nm ± 50 nm (green: G), 630 nm
It is a dot or stripe of a dichroic mirror that separates wavelengths into three wavelength regions of ± 50 nm (red: R).

(4) The light emitting member formed on the glass substrate, the black matrix, and the dot or stripe forming position of the dichroic mirror are all arranged so as to face each image display element.

[0021]

The operation of the above configuration is as follows. (1) B provided by the ultraviolet light emitted from the light source on the light emitting member
・ G / R phosphor dots or stripes are illuminated,
After converting this into one of B, G, and R visible light,
Since the image display element is directly irradiated, a color filter is not required, and not only the amount of light increases, but also
Since the B, G, and R phosphors are separated or arranged independently in the form of dots or stripes, different phosphors do not overlap with each other, and the luminous efficiency as a backlight can be improved.

(2) Each of the B, G, and R colors is formed by surrounding each of the B, G, and R phosphor dots or phosphor stripes of the light-emitting member with a black matrix and constructing this with a member that reflects ultraviolet rays. Not only makes the color clear and improves the contrast, but of the ultraviolet rays emitted from the light source, the ultraviolet rays emitted to the black matrix are reflected to the light source side, and this is again emitted to the light emitting member via the reflecting member. Therefore, the utilization efficiency of the light source (ultraviolet ray) is improved, and as a result, the emission efficiency of the backlight can be improved.

(3) Ultraviolet transmission formed on the glass substrate
By making the visible light reflection film the dots or stripes of the dichroic mirror that separates the wavelength into B, G, and R, the colored light is prevented from returning to the light source side after the light emitting member emits light by the irradiation of ultraviolet rays from the light source. In addition, the color purity of each of the B, G, and R color lights can be improved.

(4) Each of the B, G, and R light emitting members formed on the glass substrate, the black matrix, and the ultraviolet light transmitting member.
By making the dot or stripe formation position of the visible light reflection film (dichroic mirror) face each image display element, the B, G, and R color lights from the light emitting member are reflected directly or by the dichroic mirror. Since the color lights returned to the light emitting member are again applied to the image display elements arranged regularly, there is no color shift of each color of B, G and R, and the black matrix prevents
A clear image can be presented.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a configuration diagram of a transmission type color image display device which is an embodiment of the present invention, and FIG. 2 is a partially enlarged sectional view. 1 and 2, an upper substrate glass 17 and a lower substrate glass 18 are arranged so as to face each other with a spacer 19 in between, and a plurality of pixel electrodes are provided on one surface of the upper substrate glass 17 (the surface facing the lower substrate glass 18). 20 is one surface of the lower substrate glass 18 (the surface facing the upper substrate glass 17)
A common electrode 21 made of a transparent conductive film is formed on each of them, and a liquid crystal 22 is sealed between an upper substrate glass 17 and a lower substrate glass 18. In addition, the upper substrate glass 17
And outer surfaces of the lower substrate glass 18 (pixel electrode 2
The upper polarizing plate 23 and the lower polarizing plate 24 are attached to each other with an adhesive (for example, a silicone adhesive) on the surface opposite to the surface on which the 0 and the common electrode 21 are formed. These upper substrate glass 17 and lower substrate glass 1
8, the spacer 19, the pixel electrode 20 and the common electrode 21, the liquid crystal 22, the upper polarizing plate 23 and the lower polarizing plate 24.
5 are configured.

On the other hand, 26 is an ultraviolet ray, particularly 253.
A linear light source that emits UV light with a wavelength of 7 nm (for example, a germicidal lamp or a general fluorescent lamp that does not have a fluorescent substance applied and uses a quartz tube that transmits UV light to the bulb)
A reflection member 2 made of a material that efficiently reflects the ultraviolet light from the ultraviolet light source 26 is provided below the ultraviolet light source 26.
7 is provided.

Above the ultraviolet light source 26, the ultraviolet light source 2
A fluorescent substance substrate glass 28 (this material is preferably quartz glass that transmits ultraviolet rays well) is provided in parallel with the tube axis direction of 6, and the surface of the fluorescent substance substrate glass 28 on the ultraviolet light source 26 side is exposed to ultraviolet rays. An ultraviolet light transmitting / visible light reflecting film 29 made of a material that transmits and reflects visible light (for example, a film obtained by alternately depositing ZnS and SiO ₂ in a multilayer vacuum) is formed. The ultraviolet ray transmitting / visible light reflecting film 29 is used for the B phosphor 30 and the G phosphor 3 of the light emitting member 33, respectively.
1, and has a characteristic of a dichroic mirror that reflects only the B light, a dichroic mirror that reflects only the G light, and a dichroic mirror that reflects only the R light, facing the R phosphor 32, and is formed in a dot shape. ing.

Further, the light emitting member 33 is a phosphor for B 30, G
The phosphors 31 for R and the phosphors 32 for R are formed in a dot shape, and are provided on the surface facing the ultraviolet light transmitting / visible light reflecting film 29 with the phosphor substrate glass 28 interposed therebetween. Further, the light emitting member 33 is surrounded by a black matrix 34 for each dot, and the black matrix 34 has a characteristic of reflecting ultraviolet rays, for example, Rh.
Materials such as (rhodium), Al (aluminum), and Ni (nickel) are suitable.

In the light emitting member 33, the phosphor 30 for B is, for example, europium-activated barium aluminate, magnesium: BaMg ₂ Al ₁₆ O ₂₇ ; Eu ²⁺ , and the phosphor 31 for G is Teradium-activated cerium aluminate, magnesium: CeMgAl ₁₁ O ₁₉ ; Tb ^{3+ and the} like, and R phosphor 32 includes europium-activated yttrium oxide: Y ₂ O ₃ ; Eu ^{3+ and} other monochromatic phosphors. Suitable.

Above the light emitting member 33, the liquid crystal panel 25, which is an image display element, is arranged in parallel with and in close proximity to the light emitting member 33.
Are arranged. The light emitting member 33 emits B light having a wavelength of 450 nm ± 50 nm and a wavelength of 530 nm when excited by ultraviolet rays.
Phosphors 30, 31, and 32 which convert the visible light of three primary colors of G light of ± 50 nm and R light of wavelength 630 nm ± 50 nm to emit light efficiently are used as phosphor dots of B, G, and R, respectively. A plurality of phosphor substrate glasses 28 are arranged in order. Further, the liquid crystal panel 25 is a transmissive liquid crystal element having a shutter function of changing its transmittance according to an image signal to be displayed and transmitting or blocking the irradiation light (color light) from the light emitting member 33, An image is presented by changing the transmittance of the liquid crystal panel 25, that is, by transmitting or blocking transmitted light. In the above arrangement, one dot of each of the B, G, and R phosphor dots of the light emitting member 33 is made to face one pixel of the liquid crystal panel 25.

Further, an optical matching member 37 composed of a plurality of micro Fresnel lenses 35 and a light shielding member 36 having a part of openings is arranged between the liquid crystal panel 25 and the light emitting member 33 to emit light. The micro Fresnel lens 35 and the opening of the light shielding member correspond to one dot of each phosphor of the member 33, and one pixel of the liquid crystal panel 25 corresponds to these.

By configuring the transmissive color image display device as described above, as shown in FIGS. 1 and 2, the ultraviolet light directly radiated from the ultraviolet light source 26 and the reflection member 2 are provided.
The ultraviolet rays reflected by 7 are both directed to the light emitting member 33.

FIG. 2 shows the state in detail. After the ultraviolet ray (shown by the broken line in FIG. 2) passes through the ultraviolet ray transmitting / visible light reflecting film 29 and the phosphor substrate glass 28, the light emitting member 33 for B light. Phosphor 30, G phosphor 31, R phosphor 3
2, the black matrix 34 is irradiated. Here, B phosphor 30, G phosphor 31, and R phosphor 3
2 absorbs ultraviolet rays and is converted into visible light (shown by the solid line in FIG. 2) as color lights of B light, G light, and R light, respectively, and as shown in FIG. 3, three wavelengths of B, G, and R are conventional. It is optimized in the same manner as in the case of combining the emission spectrum of the light source and the spectral transmission characteristic of the color filter used in the transmission type color image display device. The color light converted into visible light is condensed by the adjacent micro Fresnel lens 35, and part of the visible light tries to return to the ultraviolet light source 26 side.

Here, an ultraviolet light transmitting / visible light reflecting film 29 is provided on the ultraviolet light source 26 side of the phosphor substrate glass 28, and this ultraviolet light transmitting / visible light reflecting film 29 is used for the B phosphors 30, G phosphors. Since it has the characteristics of a dichroic mirror that reflects B light, reflects G light, and reflects R light when facing the phosphor 31 and the phosphor 32 for R, for example, as shown in FIG. The returned colored light (B light) is transmitted by ultraviolet light.
After being reflected by the visible light reflection film 29 (in this case, a B-light reflecting dichroic mirror), the B phosphor is irradiated again and transmitted through the B phosphor to pass through the micro Fresnel lens 3
It is condensed at 5. Similarly, G light and R light are also reflected by the ultraviolet ray transmitting / visible light reflecting film 29, then returned to the G phosphor 31 and the R phosphor, respectively, and condensed by the micro Fresnel lens 35.

In the present embodiment, the ultraviolet light transmitting / visible light reflecting film 29 is formed into dots having the characteristics of dichroic mirrors of B light reflection, G light reflection and R light reflection, so that B light and G light can be obtained. , The R light of each color is improved to improve the color reproducibility, but the emission spectra of the B phosphor 30, the G phosphor 31, and the R phosphor 32 of the light emitting member 33 have a narrow band. It is not necessary to use the characteristics of the dichroic mirror for B light reflection, G light reflection, and R light reflection as long as it has emission characteristics of wavelength and high color purity. It may be the one that is held.

Usually, the color light emitted from each phosphor dot of the light emitting member 33 is diffused in a non-uniform irradiation direction. Therefore, in the case where the liquid crystal panel 25 is a transmissive liquid crystal element, even if the liquid crystal panel 25 is irradiated with the above-mentioned colored light, the liquid crystal panel 25 is irradiated vertically or nearly vertically to the liquid crystal panel 25 due to the relationship of the incident angle characteristics. The incident light easily enters the liquid crystal panel 25, but as it becomes more oblique, it becomes more difficult to enter, and color misregistration or shutter function deterioration, that is, image quality due to leakage light may occur.

The light matching member 37 solves this problem, and the irradiation light from the light emitting member 33 is included in the micro Fresnel lens 35 forming the light matching member 37.
Side light blocking member 36 by the micro Fresnel lens 35
After the light is focused at the opening position, the irradiation direction is aligned by the micro Fresnel lens 35 on the liquid crystal panel 25 side, and then the liquid crystal panel 25 is efficiently irradiated. The light blocking member 36 also has a role of separating the irradiation lights from the B, G, and R phosphor dots so as not to interfere with each other.

On the other hand, the phosphors for B 30, G of the light emitting member 33
Since the black matrix 34 irradiated with ultraviolet rays has the property of reflecting ultraviolet rays like the red phosphor 31 and the R phosphor 32, after being reflected by the black matrix 34, the ultraviolet light transmitting / visible light reflecting film 29. And is returned to the ultraviolet light source 26 and the reflecting member 27, part of the optical path is changed, and the B phosphor 30, the G phosphor 31, and the R phosphor 32 of the light emitting member 33 are irradiated again. It

In this way, the ultraviolet light emitted from the ultraviolet light source 26 is directly applied to the light emitting member 33, reflected by the black matrix 34, and then returned to the reflecting member 27 to change the optical path to the light emitting member 33. Since it is possible to irradiate, it is possible to improve the utilization efficiency of the ultraviolet light from the ultraviolet light source 26, and it is possible not only to efficiently irradiate the liquid crystal panel 25 with the light from the light emitting member 33, but also to prevent leakage light, It is possible to display a transparent image with high brightness and high image quality.

In this embodiment, the phosphor 3 for B is used.
The 0, G phosphor 31, the R phosphor 32 and the ultraviolet ray transmitting / visible light reflecting film 29 are formed in a dot shape.
It may be formed in a stripe shape in accordance with the pixel arrangement of No. 5.

Further, although the micro Fresnel lens is used as the light matching member 37, a similar effect can be obtained by using a distributed refractive index lens, an optical fiber, a light guide, a filter with a light control function or the like instead of the micro Fresnel lens. There is.

Further, although a linear light source which emits ultraviolet rays was used as the ultraviolet light source, instead of the linear light source, a planar or irregular shape (the linear light source is bent into a square shape, a W shape, a U shape, etc., It may be a flattened ultraviolet light source.

In addition, an example in which a transmissive liquid crystal element is used for the liquid crystal panel has been described, but an electrochromic element (ECD), an electro-optical ceramic element (PLZT), or a mechanical shutter mechanism is applied instead of the liquid crystal element. The same effect can be obtained by using any element such as an element as long as it can arbitrarily change the light transmittance (blocking and opening).

[0044]

As described above, according to the present invention, the following effects can be obtained. (1) By converting the B, G, and R phosphor dots or stripes provided on the light emitting member with ultraviolet rays emitted from a light source to convert them into visible light of B, G, and R Since the display element can be directly irradiated,
The color filter becomes unnecessary and the amount of light increases accordingly. In addition, since the B, G, and R phosphors are separated or arranged independently in the form of dots or stripes, different phosphors do not overlap with each other, and the luminous efficiency of the backlight can be improved.

(2) Since each of the B, G, and R phosphor dots or phosphor stripes of the light emitting member is surrounded by a black matrix and is composed of a member that reflects ultraviolet rays, Not only does the coloration of each color become clearer and the contrast improves, but of the ultraviolet rays emitted from the light source, the ultraviolet rays emitted to the black matrix can be reflected, and this can be emitted again to the light emitting member. The utilization efficiency of (ultraviolet rays) is improved, and as a result, the emission efficiency of the backlight can be improved.

(3) UV transmission formed on the glass substrate
By making the visible light reflection film the dots or stripes of the dichroic mirror that separates the wavelength into B, G, and R, the colored light is prevented from returning to the light source side after the light emitting member is irradiated with the ultraviolet light of the light source and emits light. And B
-The color purity of each of the G and R color lights can be improved.

(4) B, G, and R light-emitting members formed on a glass substrate, a black matrix, and ultraviolet light transmission
By making the dot or stripe formation position of the visible light reflection film (dichroic mirror) face each image display element, the B, G, and R color lights from the light emitting member are reflected directly or by the dichroic mirror. Since the color lights returned to the light emitting member are again applied to the image display elements arranged regularly, there is no color shift of each color of B, G and R, and the black matrix prevents
A clear image can be presented.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a transmissive color image display device that is an embodiment of the present invention.

FIG. 2 is a cross-sectional view of essential parts of a transmission type color image display device which is an embodiment of the present invention.

FIG. 3 is an emission spectrum diagram of a phosphor of a light emitting member in a transmission type color image display device which is an embodiment of the present invention.

FIG. 4 is a configuration diagram of a conventional transmissive color image display device.

FIG. 5 is a spectral characteristic diagram of a light source in a conventional transmission type color image display device.

FIG. 6 is a spectral transmission characteristic of a color filter in a conventional transmission type color image display device.

FIG. 7 is a spectral transmission characteristic of an image display element in a conventional transmission color image display device.

FIG. 8 is a configuration diagram of another conventional transmissive color image display device.

FIG. 9 is a sectional view of an essential part of another conventional transmissive color image display device.

[Explanation of symbols]

 17 Upper Substrate Glass 18 Lower Substrate Glass 19 Spacer 20 Pixel Electrode 21 Common Electrode 22 Liquid Crystal 23 Upper Polarizing Plate 24 Lower Polarizing Plate 25 Liquid Crystal Panel 26 Ultraviolet Light Source 27 Reflecting Member 28 Fluorescent Substrate Glass 29 Ultraviolet Transmitting / Visible Light Reflecting Film 30 B Fluorescent substance 31 G fluorescent substance 32 R fluorescent substance 33 Light emitting member 34 Black matrix 35 Micro Fresnel lens 36 Light shielding member 37 Optical matching member

Claims (4)

[Claims] 1. A light source having a maximum radiation power at a wavelength of 253.7 nm among ultraviolet rays, a reflection member which partially surrounds the light source and reflects a part of the ultraviolet rays from the light source, and A light-emitting member provided on the upper portion, which is composed of phosphor dots or phosphor stripes that emit blue light, green light, and red light, respectively, by ultraviolet light directly emitted from a light source and ultraviolet light reflected by the reflecting member,
A transmissive color image display device provided with an image display element having a function of transmitting or blocking irradiation light from the light emitting member, which is provided on the light emitting member, wherein each phosphor dot of the light emitting member or A transmissive color image display device characterized in that a phosphor stripe is surrounded by a black matrix that optically shields light, and the black matrix is made of a member that reflects ultraviolet rays. 2. The light emitting member and the black matrix are formed on the surface of the glass substrate facing the image display element by any one of coating, printing and vapor deposition, and the ultraviolet light transmitting / visible light reflecting film is formed on the glass substrate. The transmission type color image display device according to claim 1, wherein the transmission type color image display device is formed on a surface on the light source side. 3. The ultraviolet transmitting / visible light reflecting film formed on a glass substrate has a wavelength of 450 nm ± 50 nm (blue: B),
530nm ± 50nm (green: G), 630nm ± 50
The transmission type color image display device according to claim 1 or 2, wherein the transmission type color image display device comprises dots or stripes of a dichroic mirror that separates wavelengths into three wavelength regions of nm (red: R). 4. The light emitting member and the black matrix formed on the glass substrate, and the dot or stripe forming position of the dichroic mirror are all opposed to each image display element. 3. The transmission type color image display device according to item 3.