JPH0595498A - View finder - Google Patents

Abstract

PURPOSE:To reduce the power consumption of a light source and to make the entire view finder small. CONSTITUTION:A light radiating over a large solid angle from a small area lighting section of a light emitting element 11 is converted into a light close to a collimated light by a condenser lens 13 and the directivity is spread by a diffusion plate 15 and made incident in a liquid crystal panel 14. The liquid crystal panel 14 modulates the light in response to the video signal to display a picture. The display picture is magnified by magnification lenses 16, 18. A high polymer diffusion liquid crystal panel is adopted for the liquid crystal panel 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a viewfinder for displaying a photographed image of a video camera or the like.

[0002]

2. Description of the Related Art A display device using a liquid crystal panel is a CRT.
Since there is a high possibility of making the device lighter and thinner than the display device using, the research and development is actively conducted. In recent years, a twist nematic mode (TN mode) liquid crystal display device in which the optical rotatory power of a liquid crystal is applied to image display has been put into practical use, and is used in a portable pocket TV, a viewfinder for a video camera, and the like.

A conventional viewfinder will be described below. In addition, in this specification, a viewfinder includes at least a light source and a liquid crystal panel, which are integrally configured.

The external shape of the viewfinder (Fig. 11)
The cross-sectional structure is shown in FIG. 111 is a body, 112 is an eyepiece rubber, 113 is a mounting bracket, and 123 is a T
N liquid crystal display device. A liquid crystal display device, a backlight as a light source, and the like are stored in the body. A magnifying lens 12 is provided inside the body 111 and the eyepiece ring 122.
4, 126 are arranged, and when two lenses are combined, they function as a magnifying lens. By adjusting the insertion degree of the eyepiece ring 122, the focus can be adjusted according to the visual acuity of the user. The TN liquid crystal panel 123 has a liquid crystal layer thickness of several μm.
and a polarizing plate 127 having a mosaic color filter and functioning as a polarizer and an analyzer on both sides.
a and 127b are arranged. Viewfinder
It is mounted on the video camera body by the mounting bracket 113.
Further, reference numeral 125 is an angle adjusting fitting for adjusting the angle of the polarizing plate 127a.

A perspective view of the main elements shown in FIG. 12 is shown in FIG. The light source is composed of a fluorescent tube box 129 in which fluorescent tubes are arranged, and a diffusion plate 128 arranged in front of it. As shown in FIG. 14, the diffusion plate 128 is provided with a fluorescent tube 141 in a fluorescent tube box 129.
It is used to diffuse the light emitted from the device to form a surface light source with uniform brightness.

FIG. 15 shows a conventional liquid crystal panel, TN.
The explanatory view of operation of a liquid crystal panel is shown. In FIG. 15, 151 is a polarizing plate, 152 is a polarization direction, 153 is a transparent electrode, 154 is a liquid crystal molecule, 155 is a signal source, and 156 is a switch. As shown in (FIG. 15), the incident light rotates 90 degrees in the off state, and transmits without rotating in the on state. Therefore, when the polarization directions of the two polarizing plates 151 are orthogonal to each other, light is transmitted in the off state and is blocked in the on state. However, if the polarization directions are parallel to each other, the opposite is true. As described above, the TN liquid crystal panel modulates light to display an image.

[0007]

The video camera is required to be compact and lightweight in terms of portability and operability. Therefore, introduction of a liquid crystal panel as a viewfinder display is expected. However,
At present, the power consumption of a viewfinder using a liquid crystal panel is quite large. For example, the power consumption of a viewfinder using a TN liquid crystal panel is about 0.
There is an example in which the light source as 1 W and the backlight is about 1.0 W. The video camera has a limited battery capacity in order to ensure compactness and light weight, and when the viewfinder consumes a large amount of power, the continuous use time becomes short, which is a serious problem.

The following are possible causes of the large power consumption of the TN liquid crystal panel. As mentioned above, T
A liquid crystal panel using N liquid crystal requires polarizing plates on the incident side and the emitting side, and the total transmittance of these two polarizing plates is about 30.
%. If the transmittance of the liquid crystal panel is low, a bright light source is required to obtain the required brightness, which causes an increase in power consumption.

In view of the above problems, the present invention uses a polymer-dispersed liquid crystal panel that does not use a polarizing plate as a liquid crystal panel in order to provide a compact viewfinder with low power consumption.

The polymer dispersed liquid crystal panel will be described below. The polymer-dispersed liquid crystal panel is a type (hereinafter, PD (Polymer) in which water-drop-shaped liquid crystals are dispersed in a polymer.
rDispersed) liquid crystal panel) and a type (hereinafter referred to as PN (Polymer Network)) that colors a structure in which a polymer network is stretched around a liquid crystal layer.
k) It can be roughly divided into two). In a PD liquid crystal panel, liquid crystals exist in a polymer in a discontinuous state.
In the PN liquid crystal panel, the liquid crystal is present in a continuous state without being in the form of water drops, just as if the sponge contained the liquid crystal. In any liquid crystal panel, an image is displayed by utilizing the phenomenon that the light scattering characteristic changes depending on the applied voltage. In the present invention, any of two types of polymer dispersed liquid crystal panels can be used.

The PD liquid crystal panel utilizes the property that the refractive index differs depending on the direction in which the liquid crystal is aligned. The refractive index when the liquid crystal molecules are aligned along the applied electric field and the refractive index of the resin are matched. The behavior can be explained as a model if it is considered as follows. When no voltage is applied, the alignment directions of the liquid crystal molecules forming each water droplet liquid crystal are irregular. In this state, a difference in refractive index occurs between the polymer and the liquid crystal, so that the incident light is scattered. When a voltage is applied, the alignment directions of the liquid crystal molecules are all aligned and the difference in the refractive index between the liquid crystal and the resin disappears, so that the incident light does not scatter and travels straight.

The PN liquid crystal panel uses the irregularity itself of the alignment of liquid crystal molecules. This can also be explained as a model by considering the following. When no voltage is applied, each liquid crystal molecule is irregularly aligned, and the incident light is scattered. When a voltage is applied, the alignment state of liquid crystal molecules becomes regular,
Incident light goes straight.

A PD liquid crystal panel will be described below as an example for ease of explanation. A liquid containing a liquid crystal to be injected into a polymer dispersed liquid crystal panel is generically called a liquid crystal solution, and a state in which a resin component of the liquid crystal solution is polymerized and cured is called a polymer.

The liquid crystal material is preferably a nematic liquid crystal, a smectic liquid crystal or a cholesteric liquid crystal, and may be a single liquid crystal compound or a mixture of two or more liquid crystal compounds or a mixture containing a substance other than the liquid crystal compound. Most preferred is a cyanobiphenyl nematic liquid crystal. The resin material is preferably a transparent polymer, and may be any of thermoplastic resin, thermosetting resin, and photocurable resin. Considering the ease of the manufacturing process, the separation from the liquid crystal phase, and the like, it is preferable to use an ultraviolet curable resin. In particular, an ultraviolet curable acrylic resin is indicated, and a resin containing an acrylic monomer or an acrylic oligomer that is polymerized and cured by ultraviolet irradiation is particularly preferable. When these are irradiated with ultraviolet rays, only the resin undergoes a polymerization reaction to become a polymer, and the liquid crystal undergoes phase separation.

The ratio of the liquid crystal material to the resin material is important for obtaining good contrast. When the ratio of the liquid crystal to the resin is small, independent particle-shaped liquid crystal in the form of water drops is formed. When the ratio of the liquid crystal material to the resin is large, the resin matrix exists in the liquid crystal material in the form of particles or networks, and the liquid crystal is formed so as to form a continuous layer. The optimum mixing ratio of liquid crystal material and resin material is 9: 1 to 1: 9
And the range of 8: 2 to 4: 6 is particularly preferable.
Further, in order to secure a good contrast, it is necessary that the particle diameter of the water-drop liquid crystal or the pore diameter of the polymer network is uniform to some extent, and that the size is in the range of 0.1 μm to several μm. Otherwise, the incident light scattering performance is poor and a good contrast cannot be secured. The average particle diameter of the water-drop liquid crystal and the average pore diameter of the polymer network are preferably in the range of 0.5 μm to 2.0 μm. Above all, the range of 0.8 μm to 1.5 μm is optimal. To satisfy such conditions, the resin must be a material that can be cured in a short time, such as an ultraviolet curable resin.

Next, the operation of the polymer dispersed liquid crystal panel will be described. A schematic model diagram of the polymer dispersed liquid crystal panel is shown in (FIG. 16 (a)) and (FIG. 16 (b)). 161 is an array substrate, 162 is a pixel electrode, 163 is a counter electrode, 1
Reference numeral 64 is a water droplet liquid crystal, 165 is a polymer, and 166 is a counter substrate. A switching element such as a TFT is connected to the pixel electrode 162, and a voltage is applied to the pixel electrode when the switching element is turned on and off to change the liquid crystal alignment direction on the pixel electrode to modulate light. As shown in FIG. 16 (a), when no voltage is applied, the liquid crystal droplets 164 are oriented in irregular directions, and in this state, a difference in refractive index occurs between the polymer 165 and the liquid crystal, and Light is scattered. As shown in FIG. 16B, when a voltage is applied to the pixel electrodes, the directions of the liquid crystals are aligned. In this state, the refractive index of the liquid crystal and the refractive index of the polymer are equal, so that the incident light does not scatter and the array does not scatter. The light is emitted from the substrate 161.

However, the polymer dispersed liquid crystal panel has a visual field
The corners are very narrow. Light incident on polymer dispersed liquid crystal panel
The lines are parallel and the higher the directivity, the higher the contrast.
Can be taken. However, the rays are parallel and directed
If the resistance is high, a voltage is applied to the liquid crystal panel and the panel is transmitted.
The angle of the range that looks bright when it is in the state (on state)
Becomes narrower that much. I will explain this in more detail
For this purpose (FIGS. 10A and 10B), a polymer-dispersed liquid crystal panel is used.
Shows the graph of viewing angle and brightness in the transmission-scattering state of
did. Incident light rays perpendicular to polymer dispersed liquid crystal panel
The panel on the opposite side of the extension line
Angle is 0 ° in the direction perpendicular to
A plot of brightness at a point moved by degrees θ
Is. Very narrow when the panel is in the transparent state (on state)
Very bright only in a wide angle range,
Dark and dark. Also, when the panel is in the scattering state (off state)
Somewhat bright at the angle. Graph and scattering at this transmission
Angle θ at which time graph intersects ₁And θ₂In the range of
Although white is displayed when the time is excessive and black is displayed when the time is scattered, θ₁And θ₂of
Black and white are reversed in an angle range wider than the angle. For this
The display has a very narrow viewing angle.

[0018]

In order to solve the above-mentioned problems, the viewfinder of the present invention has a condenser lens for condensing light emitted from a light emitting element and converting it into parallel light, and a condenser lens for condensing the light. In addition, a liquid crystal display device for modulating light is provided, and the viewing angle is widened by using a diffusion plate or a polymer dispersed liquid crystal panel as a diffusion means in order to broaden the directivity of light rays.

[0019]

In the viewfinder, the position of the observer's pupil is almost fixed by the eyepiece ring. Therefore, a wide viewing angle is not required, but a slight viewing angle is required depending on the viewing position of the display screen in the eyepiece ring. When a polymer dispersed liquid crystal panel is used for the viewfinder, if the light source placed behind it has a narrow directivity, even the movement of the pupil within the eyepiece ring will cause black and white of the displayed image to be reversed, making it very difficult to see.

Therefore, in the viewfinder of the present invention,
Using a light source with a small light emitter, the light emitted from the light emitter in a wide solid angle is converted into nearly parallel light by a condenser lens, and the directivity is expanded by a diffusion plate. This way
Light emitted from the liquid crystal panel has a wide directivity and a wide viewing angle, which is sufficient for use in a viewfinder. If the size of the light-emitting body is small, the power consumption is naturally small.

The condenser lens has no aberration and the transmittance is 100%.
In the case of, the brightness of the light emitter viewed through the condenser lens is equal to the brightness of the light emitter itself. The maximum transmittance of the liquid crystal panel including the color filter and polarizing plate is 30%, the transmittance of the condenser lens is 90%, and the brightness required for the viewfinder is 1%.
If it is 5 [ft-L], the brightness required for the light source is about 560.
[Ft-L]. In the present invention, the fluorescent light emitting tube or L
An ED (Light Emitting Diode) is used. Since the fluorescent light emitting tube operates with direct current, the driving circuit is simple, and since the spectral characteristics are continuous, the color tone is good. Further, since the LED has a low driving voltage and the driving circuit is relatively simple, the driving circuit can be made very compact.

In the viewfinder of the present invention, a light emitting element having a small light emitting body is used as a light source, and light emitted from the light emitting element in a wide solid angle is efficiently condensed by a condensing means. Therefore, a fluorescent lamp backlight is used. The efficiency is higher and the power consumption of the light source is lower than the case.

Since the liquid crystal panel using the polymer dispersed liquid crystal does not require a polarizing plate, the brightness of the light source for obtaining the required screen brightness is lower than that of the liquid crystal panel using the TN liquid crystal. Therefore, the power consumption of the light source can be significantly reduced.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the viewfinder of the present invention will be described with reference to the drawings.

FIG. 1 shows a sectional structure of a first embodiment of a viewfinder according to the present invention. 11 is a light emitting element, 12 is a body, 13 is a condenser lens, 14 is a liquid crystal panel, and 15 is It is a diffusion plate.

In this embodiment, as an example, the diagonal length of the display area of the liquid crystal panel 14 is 28 mm, and the condenser lens 1
3 has an effective diameter of 30 mm and a focal length of 15 mm. The light emitting element 11 is arranged near the focus of the condenser lens 13. The condenser lens 13 is a plano-convex lens,
The plane faces the light emitting element side. An eyepiece ring 17 is attached to the end of the body 12, and the body 12 and the eyepiece ring 17 are attached.
The magnifying lenses 16 and 18 are attached to each of them.

The light emitted from the light emitting element 11 in a wide solid angle is converted into light having a narrow directivity by the condenser lens 13 so as to be nearly parallel. The light beam has its directivity widened by the diffusion plate 15 and enters the liquid crystal panel 14 from the counter electrode (not shown) side. The liquid crystal panel 14 changes the amount of light transmission or the degree of scattering of light according to a video signal to form an image.

A phenomenon in which the viewing angle of the liquid crystal panel 14 is widened by the diffusion plate 15 will be described. (Fig. 9 (a)
A graph of viewing angle and brightness in a transmission-scattering state of the polymer dispersed liquid crystal panel according to the example of the present invention is shown in (b)). The measurement conditions are the same as in (FIG. 10). When the panel is in the transmissive state (on state), the diffuser 15 emits a light beam having a wide directivity as it is, so that the angular range where it looks bright becomes wider than in the case of (FIG. 10). Even when the panel is in the scattering state (off state), if the directivity is wide, the amount of light rays obliquely incident on the panel increases, and the scattering effect increases. Therefore, the brightness around θ = 0 ° is further reduced. From this, the range of the angles θ ₃ and θ ₄ where the graph at the time of transmission and the graph at the time of scattering intersect is wider than the angles of θ ₁ and θ _{2 in} FIG. 10, that is, the viewing angle is widened.

The observer brings his eye into close contact with the eyepiece ring 15 to see the display image on the liquid crystal panel 14. When all the pixels of the liquid crystal panel 14 allow light to go straight, the condenser lens 13 is all observed after the light that has exited the light emitting element 11 and has entered the effective area of the condenser lens 13 has passed through the magnifying lenses 16 and 18. Incident on the eyes of the person. The combination of the two lenses 16 and 18 functions as a magnifying lens, so that an observer can magnify and see a small display image on the liquid crystal panel 14.

In the present invention, a fluorescent light emitting tube is used as the light emitting element 11. The appearance is a miniature bulb shape, and the filament and the anode are installed in a case made of glass. A voltage of 4 V to 10 V is applied to heat the filament to emit electrons. A voltage is also applied to the anode to accelerate the electrons, and the accelerated electrons collide with mercury molecules enclosed in the glass tube to emit ultraviolet rays. This ultraviolet ray excites the phosphor to generate visible light. As a result, a bright light source with low power consumption can be obtained.

An LED may be used as the light emitting element 11. The light-emitting body is composed of red, green, and blue light-emitting chips and has a total of four terminals, one terminal for each color light-emitting chip and a common terminal. The three light emitting chips are molded with transparent resin.

In order to improve the gradation of the displayed image on the liquid crystal panel 14, it is desirable that the transmittances of the red, green and blue pixels be substantially equal. Then, it is necessary for the LED to emit white light having a predetermined chromaticity. The LED of the present invention can adjust the emission color of the light-emitting body by controlling the voltage or current applied to each of the red, green, and blue light-emitting chips, and can adjust the chromaticity of the image displayed on the liquid crystal panel 14. You can This chromaticity adjustment is extremely easy as compared with the case where a fluorescent light backlight is used.

The liquid crystal panel 14 is preferably a polymer dispersed liquid crystal panel. As described above, in the polymer dispersed liquid crystal panel, when the voltage applied to each pixel is changed, the light scattering degree of that pixel changes. The light scattering degree is the largest when no voltage is applied, and the light scattering degree decreases when the applied voltage is increased. When light with a narrow directivity is incident on the liquid crystal panel 14 and the degree of light scattering is changed, the amount of light incident on the pupil of the observer from that pixel changes, and the brightness of the pixel seen by the observer changes. Therefore, an image is displayed using this.

A mosaic color filter (not shown) is attached to the liquid crystal panel 14. Each color filter transmits any color of red, green, and blue. The film thickness of each color may be controlled by the composition of the filter. The film thickness of the filter is adjusted and formed when the filter is manufactured. That is, the film thickness of the filter is changed between red, green and blue. The polymer-dispersed liquid crystal panel has poor scattering characteristics for long-wavelength light (red). Therefore, if the liquid crystal layer thickness of the red pixel is made thicker than that of the other blue and green pixels, the scattering performance can be improved and the gradation of red, green and blue can be made uniform. ..

The condensing lens 13 has a flat surface, that is, a surface having a large radius of curvature facing the light emitter side. This makes it easy to satisfy the sine condition and improves the brightness uniformity of the display image on the liquid crystal panel 14. This is because

By adjusting the degree of insertion of the eyepiece ring 17 into the body 12, the focus can be adjusted according to the visual acuity of the user. Two positive lenses 1
It is also possible to form 6, 18 with one lens. A sectional view of the structure at that time is shown in FIG. Further, even if the viewpoint position of the user is slightly shifted, the display image can be viewed well. Since the position of the observer's eyes with respect to the eyepiece ring 17 is fixed, it is necessary to arrange the light emitting element 11 at a predetermined position so that the observer can see a good image.
Therefore, although not shown, the light emitting element 11 is provided with a position adjusting mechanism so that it can be moved back and forth or left and right to some extent. The two positive lenses 1 shown in (FIG. 1)
It is also possible to remove 6 and 18 and use the configuration shown in FIG.

A diaphragm 41 may be arranged in the vicinity of the light emitting element 11 to have a structure as shown in FIG. By doing so, the size of the light emitting portion of the light emitting element 11 can be reduced, unnecessary light can be reduced, and at the same time, the contrast of the display image on the liquid crystal panel 14 can be improved.

The diameter of the hole of the diaphragm 41 may be variable. In this case, if the diaphragm 41 is a variable diaphragm used in a camera, and the hole diameter of the diaphragm 41 is changed by rotating a lever (not shown) taken out of the body 12. Good. Aperture 4
When the size of 1 is changed, the size of the light emitting portion of the light emitting element 11 is changed, and the directivity of the light emitted from the condenser lens 13 is changed. Therefore, the contrast of the display image on the liquid crystal panel 14 should be changed. You can

The diffusing plate 15 is preferably arranged as close as possible to the liquid crystal panel 14, and this embodiment is shown in FIG. In this way, the directivity of the light beam is widened and the light utilization efficiency is improved, and bright display is possible.

If the diffusing plate 15 is installed between the liquid crystal panel 14 and the magnifying lens 16, it is not preferable because the image on the liquid crystal panel 14 will be blurred, but it is shown in another embodiment of the present invention (FIG. 6). By disposing the diffusion plate 15 adjacent to the exit side of the liquid crystal panel 14 as described above, the image is not blurred, and the liquid crystal panel 14 widens the directivity of the light in the transmitted state to widen the viewing angle.

A sectional view of a viewfinder of another embodiment of the present invention is shown in FIG. In the present invention, the polymer dispersed liquid crystal panel 71 can be used as the diffusing means.
If the polymer dispersed liquid crystal panel 71 in which the polymer dispersed liquid crystal is sandwiched between the two substrates having no electrodes is used, the same effect as that of the diffusion plate 15 is exhibited. If a polymer-dispersed liquid crystal panel 71 having a polymer-dispersed liquid crystal sandwiched between two substrates having electrodes is used, a signal synchronized with the liquid crystal panel 14 that modulates light and displays an image is applied and driven. In this case, the diffusion effect can be changed between the transmission state and the scattering state, so that the light utilization efficiency can be further increased.

Many variations of the viewfinder of the present invention are conceivable based on the description of the embodiments, and all of these variations are within the scope of the present invention. For example (Figure 8)
The viewfinder in which the Fresnel lens 81 is used as the condenser lens 13 of the viewfinder of the present invention shown in FIG.

By changing the condenser lens 13 to the Fresnel lens 81, the depth can be further shortened.
However, the pitch of the Fresnel lens 81 is set to the liquid crystal panel 14
It is necessary to set the pitch of the Fresnel lens 81 so that moire does not occur between the pixel pitches.

With the above configuration, the light emitting element 11
The light emitted from a small illuminant with a wide solid angle is efficiently condensed by the condenser lens 13, so that the power consumption of the light source can be significantly reduced as compared with the case of using a fluorescent lamp backlight. it can.

When an LED is used as the light emitting element 11,
In the description of the embodiments, the red, green, and blue light emitters are resin-molded into one resin. However, the present invention is not limited to this. For example, a method of arranging the light emitters in close proximity without molding,
A method of arranging molded products of red, green, and blue light emitting bodies in close proximity to each other can be considered.

Needless to say, in the viewfinder of the present invention, when the display image on the liquid crystal panel 14 may be a single color or a two color display, an LED or a fluorescent light emitting tube emitting a single color or two colors may be used.

[0047]

As described above, in the viewfinder of the present invention, the light emitted from the small light emitting element of the light emitting element in a wide solid angle is converted into the nearly parallel light by the condenser lens and modulated by the liquid crystal panel. Then, the image is displayed, so that the power consumption is low and the uneven brightness is reduced. If a polymer dispersed liquid crystal panel is used as the liquid crystal panel, the power consumption can be further reduced as compared with the TN liquid crystal panel.

Further, the viewing angle of the polymer-dispersed liquid crystal panel can be widened by expanding the directivity of light rays by using the diffusion plate.

If the viewfinder of the present invention is used by mounting it on a video camera, it consumes less power and can be used for a long time continuously, and has a wide viewing angle and a good image even when the viewpoint is moved. Display is obtained. ..

[Brief description of drawings]

FIG. 1 is a sectional view of a viewfinder according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a viewfinder according to another embodiment of the present invention.

FIG. 3 is a sectional view of a viewfinder according to another embodiment of the present invention.

FIG. 4 is a sectional view of a viewfinder according to another embodiment of the present invention.

FIG. 5 is a sectional view of a viewfinder according to another embodiment of the present invention.

FIG. 6 is a sectional view of a viewfinder according to another embodiment of the present invention.

FIG. 7 is a sectional view of a viewfinder according to another embodiment of the present invention.

FIG. 8 is a sectional view of a viewfinder according to another embodiment of the present invention.

FIG. 9 is a graph showing the relationship between the viewing angle and the brightness in the polymer dispersed liquid crystal panel used for the viewfinder of the present invention.

FIG. 10 is a graph showing a relationship between a viewing angle and brightness in a polymer dispersed liquid crystal panel.

FIG. 11 is a perspective view of a viewfinder of a video camera.

FIG. 12 is a sectional view of a conventional viewfinder.

FIG. 13 is an explanatory diagram of a conventional viewfinder.

FIG. 14 is an explanatory diagram of a conventional viewfinder.

FIG. 15 is an explanatory diagram of the operation of the TN liquid crystal panel.

FIG. 16 is an explanatory diagram of the operation of the polymer dispersed liquid crystal panel.

[Explanation of symbols]

 11 Light-Emitting Element 12 Body 13 Condensing Lens 14 Liquid Crystal Panel 15 Diffusing Plate 16, 18 Magnifying Lens 17 Eyepiece Ring 41 Aperture 71 Polymer Dispersed Liquid Crystal Panel 81 Fresnel Lens 123 TN Liquid Crystal Panel 127a, 127b Polarizing Plate 129 Fluorescent Tube Box 141 Fluorescent Tube

Claims (11)

[Claims] 1. A light emitting element, a condensing means for converting light emitted from the light emitting element into substantially parallel light, a liquid crystal panel for modulating light emitted from the condensing means, the light emitting element and a liquid crystal panel. A viewfinder, which is provided between the light emitting elements and diffuses the light emitted from the light emitting element. 2. A light emitting element, a condensing means for converting light emitted from the light emitting element into substantially parallel light, a liquid crystal panel for modulating light emitted from the condensing means, the light emitting element and a liquid crystal panel. A viewfinder comprising: a diffusion unit disposed between the diffusion units for diffusing light emitted from the light emitting element; and a magnifying display unit for magnifying a display image on the liquid crystal panel. 3. A light emitting element, a condensing means for converting light emitted from the light emitting element into substantially parallel light, a liquid crystal panel for modulating light emitted from the condensing means, and a display image on the liquid crystal panel. A viewfinder characterized in that a magnifying display means for enlarging and a diffusing means arranged between the light emitting element and the liquid crystal panel for diffusing light emitted from the light emitting element are arranged close to an incident side of the liquid crystal panel. 4. A light emitting element, a condensing means for converting light emitted from the light emitting element into substantially parallel light, a liquid crystal panel for modulating light emitted from the condensing means, and a display image on the liquid crystal panel. A viewfinder characterized in that a magnifying display means for enlarging and a diffusing means for diffusing the light modulated by the liquid crystal panel are arranged close to the emission side of the liquid crystal panel. 5. A light emitting element, a condensing means for converting light emitted from the light emitting element into substantially parallel light, and a diaphragm means arranged in the vicinity of the light emitting element for controlling light emitted from the light emitting element. A view comprising: a liquid crystal display panel for modulating light emitted from the light collecting means; and a diffusing means arranged between the light collecting means and the liquid crystal panel for diffusing light emitted from a light emitting element. finder. 6. The viewfinder according to claim 1, wherein the liquid crystal panel uses a polymer-dispersed liquid crystal. 7. The viewfinder according to claim 1, wherein the light collecting means is a Fresnel lens. 8. The viewfinder according to claim 1, wherein the diffusing means is a polymer dispersed liquid crystal panel. 9. The light condensing means is configured so that the light emitted from the light emitting element and entering the effective area of the light condensing means and traveling straight through the liquid crystal panel reaches the pupil of the observer. The viewfinder according to claim 5. 10. The viewfinder according to claim 6, wherein the liquid crystal layer of the polymer-dispersed liquid crystal panel has an average particle diameter of water-drop-like liquid crystals or an average pore diameter of a polymer network of 0.5 to 2.0 μm. 11. The viewfinder according to claim 1, wherein the light emitting element is a fluorescent light emitting element having a phosphor.