JPS58116528A - Viewfinder display equipped with liquid-crystal cell - Google Patents

Abstract

PURPOSE:To obtain a small-sized camera by cutting an end part of focusing glass and holding liquid-crystal cells in a viewfinder by said cut part. CONSTITUTION:For incorporation in a single-lens reflex camera, an eye beam lens 1, pentagonal roof prism 2, condenser lens 3, viewfinder visual field frame 4, focusing glass 5, reflex mirror 6, photographic lens 7, half-mirror F slanting to the condenser lens 3, photoelectric element PC, etc., are provided. In part of the focusing glass 5, the display element 100 consisting of liquid-crystal cells is incorporated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a finder display device equipped with a liquid crystal cell.

Traditionally, fC devices have used liquid crystals to display camera shadow information in the fuzzer. ! rara is known. However, these conventional devices
(9) There were problems such as dirt entering the camera and damaging the field of view, difficulty in incorporating it into a camera with a small space (9), and a lot of noise at the boundary between the shooting information display and the subject (9). However, it was not desirable as a finder device.

It is an object of the present invention to eliminate the entry point τ of such conventional devices.

The present invention will be explained below with reference to FIG. (3).

Figure wJ1 is for explaining the #lt structure and operation of an example of a V-crystalline cell applied to the present invention. 52Fi first substrate, s3 a resistance layer formed on the substrate 52;
4 is a space filled with Nemanak liquid crystal exhibiting an electric field effect;
5sij A second substrate, SS is a conductive layer or a resistive layer formed on the substrate 6, and 57 is a second polarizing plate. In the figure, the liquid crystal cell is of a transmissive type, but in the case of a reflective liquid crystal cell, #'' indicates a case where a diffuse reflection plate is provided beyond the polarizing plate 57. 1B) A plan view of the Fi substrate s2, in which a resistance layer 54 is formed on the substrate 52,
A highly conductive terminal (terminal 115in, 53Ik) is formed in at least two separate regions of the resistance layer 53. A conductive layer or a resistive layer is formed, and the space therebetween holds an electric field effect 'It; (4) 2 In the same figure, the liquid crystal cell 5 is sealed with a schematic V (shown in the diagram, s3 represents the resistive layer on the substrate 52, and 5j represents the conductive layer on the substrate S-). ◇ The arrow on the polarized light &sl indicates the polarization plane of the polarizing plate, and the arrow on the point - on the resistive layer 53 indicates the orientation direction of liquid crystal molecules on the resistive layer surface, and the arrow on IIs indicates the alignment direction of the liquid crystal molecules on the layer 55 facing the fJIJ resistor layer 53. During this time, the liquid crystal molecules filled with 41I are gradually twisted within the angle formed by the two arrows A1. The arrows on the polarizing plate 57 represent the plane of polarization of the polarizing plate.60 This polarizing plate 57 is the one that detects the light emitted from the cell. In Fi liquid 11
The orientation of the blood molecules is eoo. In the same figure, the incident light io from the top of the page is oriented according to the polarization plane of the polarizing plate S1, and is located between the resistive layer 53 and the layer 55. When the offering layer is removed, the orientation of the liquid crystal molecules changes depending on the orientation of the liquid crystal molecules, and the second polarization is obtained by rotating the 11-9 axis 8 and 57 W.
C Person H'j 6 o Now, if the plane of polarization at this time and the polarizing plate unitary (8) or WO0+r are formed, the incident light 10 will be
Chonobuo L, Mine Toka II! The surveyor identifies the data in the dark. When an electric field greater than the value of liquid crystal cell V is applied, the ridges -
Is one molecule surrounded by && in the direction of its long axis? At this time, the liquid crystal is homodynamic with respect to the incident light, so rotation between the polarizations of the incident light does not occur.By leveraging the two polarizing plates If the direction of the unidirectional force is parallel, the light will pass through when a magnetic field is applied, and when there is no application as described in niJ, it will become bright dust! is reversed. Figure 1 (The resistance is the electro-optical characteristic of the liquid crystal cell t--
This is a diagram for clarification, Shin@ is voltage, Vertical@ is transparent light storm,
vth is the threshold i1k k II of dynamic scattering liquid crystal (L) 5M effect) is about 3 to SV・It (DAP effect) = 1 h Vol
It has a sufficiently low threshold voltage compared to t. In addition, field effects exhibiting low IIIiI value characteristics include TN, D
This may be based on the AP effect, and these are caused by deformation of the alignment of liquid crystals or polarizing plate Iv! This was accomplished in a modification of the next display detection method using Also, dichromatism? &
A method is also proposed in which the color change due to the orientation change is detected by m* weaving without using a polarizing plate by adding it to the crystal layer. Book? &crystal cells can be applied to all liquid crystal display systems that possess these low-value characteristics;
The basic driving method of this donated cell, which is particularly effective for the TN effect having the lowest linear shift, is to impart a potential distribution to the resistance layer 63 as shown in FIG. and 560
When a potential skin is generated between the conductive layer 68 and the resistive layer, voltage is applied and the voltage between the resistive layer 68 and the five conductive layers or resistive layers is
A physical condition that gives a potential difference distribution based on the potential difference, and performs the desired display in a potential difference region that does not exceed the electro-optical +1lthl- of the 611 E g crystal within the potential difference distribution! I: Based on the applied magnetic pressure. Figure 1 (flyu
The horizontal axis is the long direction l of the display surface of the resistance layer 53, and the voltage t
The potential distribution generated by the resistive layer 53 where the voltage between 1dlAi1 is uniform is shown by 0-force in Figure 5, which is taken on the vertical axis, s6 in Figure 1 (4). If it consists of a low-resistance layer or a conductive layer south of the resistor, which is sufficiently lower than the resistance layer 53, the applied voltage will not change depending on the position of -, so it will be a horizontal LIL#M of cc'. The voltage distribution generated in the oQ crystal cell shown is the circle #AIl and L
! In reality, the voltage distribution is continuous. The inertia (±) (directivity) is due to the electro-optical characteristics of the liquid crystal that is used in the moment.
That's right, so that w44! iL is ± around c c/
In the vtb, wholesale 2 Considering the imperial filling area of the vtb, the arrow pointing to the left of the glenoid position is the glume area where the placement falls 'I e '1
The electrochemical change l&l11 does not occur within. Figure 1 (g
)μThe display state in such a case is shown, and the non-modulated electric range corresponding to '1 e '1 (11 indicates 6 bits) is shown for the 9-full display front area enclosed in a square. As described above, in the present invention, by making the area (1) which exceeds the threshold of the liquid crystal sufficiently large compared to the area (1) which does not exceed the threshold of the liquid crystal, it is possible to provide six apparently dot-shaped or linear lines. be.

That is, the gift display device of the present invention changes the potential gradient between ^1 (
) and C potential level change (l
(indicated by vertical movement of tmcc') allows you to steplessly move the hatamoto to any position within the entire display area with any line width.
In other words, complete analog display is possible.

Figure 5 (k) shows a liquid crystal cell in the -11th century when the glue is a resistive layer, i.e., both substrates provided on two substrates are resistive layers. 't - In this case, the younger sister V ( shown in tdx diagram (f))
The potential difference distribution ° generated between the electrodes corresponds to the two arrows e surrounded by one edge. In this way, a realistic potential difference distribution with a large yc can be applied to the voltage of the A terminal or the D1 terminal as shown in FIG. 1 (fl).

Of course, in order to apply it to the present invention, the PI type (
The quasi-crystal cell fc of the 11L field effect activated type does not sleep, and even the DSM type (dynamic furrow type) does not sleep.

Fig. 2 is an explanatory diagram of the Sk system νIJ in which a part of the indicator according to the present invention (C) is incorporated into a reflex camera. , 4 is the viewfinder field frame, 5 is the bintofus, b is the reflex mirror, 7 is the wound lens,
F is a half mirror attached diagonally to the condenser lens, P
C is a six-piece element consisting of a monocrystalline cell incorporated in a part of the light** element 5.

Figure 3 (Punishment 1) This is a one-circle diagram and a schematic perspective view of the liquid crystal cell installation in bJti No. 21. A prism (a micro prism is also acceptable) is equipped with a matte-finished focal plane 5P on the upper side, a Fresnel prism 5F on the lower surface, and a pine illuminated by the subject light on one surface of the 7) dsM, display The display element is provided with a recessed portion with a display main body consisting of an element mounting seat 5A, etc. The display element is made of glass flat plates 10, 11 sandwiched between polarizing plates 8.1.
A desired electric field V is applied to the product substance 12 surrounded by 6
The visual field frame of o4, which is sensed IN so that the display is carried out, presents the display window 41 by masking the junction between the focal direction 5P and the gIl&& cell, and also provides the display window 41 between the condenser lens 3 and the focusing glass S. Since it doubles as a spacer, the display is clear and it also prevents dirt from entering.

Figure 4 i'') t ('l is a diagram showing the details of the liquid crystal cell, which is a ten-dimensional diagram and a front view, respectively. In the same figure, the glass f plate i
On the ocDm surface, a concave tlllOc with an injection port for the liquid leakage substance 12 is removed by glass etching.
A tL% translucent resistor 1011 is deposited using, for example, A71ii. Resistor 10R4 recess 10c
It is thinner than that, and the removal depth of concave #lOC is 4-S.
Since it is sufficient to use a material with a hardness of Oμ, prevention of liquid leakage when later injecting the liquid crystal material 12 is relatively soft. For example, the inner end of the resistor 1G11 is equipped with a vacuum shield ((10F).

10F' adhesion processing is applied. On the surface of the glass flat plate 90, a translucent single pole 11T is attached, for example, by vacuum deposition, and on the -14i end, a wiring electric pole 11F is attached by vacuum deposition. After the coating agent S on both glass plates has been subjected to the contacting process as shown below, injection is performed from the injection port 121 under the pressure 1c of the liquid crystal storeroom 12, and injection port 12107-
Sealing with agent S, gloss IOW, jOW' and llW
The soldering process is carried out, and the polarizing plates 8°9 are attached to the top and bottom to form a liquid crystal cell, and the installation cost is 10mm.
It is attached to the mounting seat 5m.

aS diagram (a), (blFi is a 91-boss diagram of the viewfinder field of view according to the above-mentioned study, and it is a 9-value diagram, and 4P in the D diagram, which is a 6-digit value for the shunter second #.

11 each 4M field frame 4 subject celebration windows, 12F.

12T can be printed on the back of the wound 1 gaff plate 10 or the grave 1 with a scale that fits in the lower part, or layered on the ioiM part of the focus glass made of Jlir acrylic wood, or even a photographic film. It is provided by a method such as processing letters on the base and placing nine sheets near the focal plane IP. In this configuration, when an electric field is applied to the liquid crystal cell as described above, an opaque display is displayed, and the display content is visually recognized at an optically visible position with display noise removed.

FIG. 6 is a perspective view showing a modified example of the liquid crystal cell. I@
! k) * (') e k) shows the scissors modified example 0WIP face, the same figure (a) is a plan view of Fi glass flat plate 50, the same figure (b) is a plan view of glass flat plate 11, Oka It (@) is an enlarged sectional view of the bottom when both glass plates are joined. First, in 1 m2, there are #iS wiring electrodes 10F, 1・de', and 11F' on the glass flat plate 11, of which till@Flier' is the translucent resistor l/IK connected on the glass flat plate 4 [11], and the electrode 11 de' is the wiring electrode connected to the end of the photosensitive conductor 1i11'r on the glass flat plate lo. It is located at a position corresponding to 11P.

When both glass plates are bonded together, the wiring electrodes 11F and 11F' that were attached to each glass plate are automatically connected as shown in the same figure (-1). It is possible to take three terminals outside the optical path (9), which simplifies the wiring process.Also, since it is possible to take three terminals from one glass flat plate, it is possible to use a terminal like the one shown in 14 in the ms diagram. As shown in FIG. 1, the liquid crystal cell can be easily incorporated into the focusing glass 5, which has the advantage of simplifying the wiring process.

It goes without saying that the transparent electrode 11T and the wiring electrode 11D shown in FIG. 7(a) can be integrally formed by attaching the same transparent resistive material.

FIG. 8(,) is a cross-sectional view of another embodiment of the liquid crystal cell display section, and FIG. This is applied to needle-type exposure adjustment, and a needle IS that moves mechanically in conjunction with the aperture wheel setting or shutter speed setting dial is installed at the threshold of the crystal cell and the dial. Appropriate exposure is obtained by aligning the cell's photometry fitting 1zit6c.@In this method, the display within the 7-inder 1 can be seen as shown in Figure 1 (b) - Same as the example in the WJ note. There is a mask 4 which also serves as a spacer, so even if dirt or dust gets in through the needle passer's sky threshold, it is possible to keep the inside of the photographic field of view window in the intercalary condition by reaching the liquid crystal cell display section. a m k) is an example of a viewfinder field blind 1101E type, in which the needle 1s is installed below the focusing glass 2 or at the threshold of the condenser lens 1 and the pentaprism 20, as in a known camera.

Figure 9 shows a modification of the enemy crystal cell O@ display method. In the modification, a viewing frame is displayed in conjunction with the battery switch. An enemy insect cell that is sandwiched between two processed glass plates and subjected to sML using a dichroic polarizing plate for polarization and S is prepared in the same circle as the entire image of the viewfinder, and the photoforming turtle described above is By making the adhesion area the same as the viewing frame range, when the battery is switched off, the entire surface is displayed in uniform color as shown in the figure (,), and when the OS is on, it is displayed as in the same figure (b). Only the sea bream area within the field of view frame 210, which also serves as a mask for 1!4I, is displayed transparently. This display method not only displays a field frame that also serves as a mask for the liquid crystal display section, but also serves as a battery switch OFF display.

As described above, in a camera finder display device that uses the Fi liquid crystal cell of the present invention to display wound information in the viewfinder, the end of the focusing glass is cut out, and the back of the focusing glass is cut out. Since the liquid crystal cell is held within the finder, the liquid crystal cell can be extremely easily positioned at a predetermined position within the finder optical path. Further, according to the present invention #1, there is no need to provide a round member for positioning the liquid crystal cell, and the miniaturization of the camera becomes more efficient.

[Brief explanation of the drawing]

I! The z diagram shows an example of a liquid crystal cell applied to the finder display device according to the present invention, the diagram (1) is a configuration diagram, and the diagram (1) is a configuration diagram.
b) and (c) are the substrate 8 of the cell, respectively. . A plan view of the liquid crystal cell, the figure (-) shows the electrical connection If of the liquid crystal cell.
t#A, same figure (・) Graph of the electro-optical characteristics of the above liquid cell before Fi, same figure (f) # (g) is an explanatory diagram of the operation of the above liquid crystal cell, #J wA(kl, (1) is An electrical connection diagram and an operation explanatory diagram of a modified example of the cell, respectively. Figure 2 is a plan view showing an embodiment of the present invention partially adapted to a V7 camera. Figure 3 (-), (b) ) shows the details of the cell attachment to the liquid shown in FIG. 2, and FIG. Plan view and cross-sectional view / Figure S<@) I (b) shows an example of the viewfinder field of view, and Figure 6 shows an example of displaying the tltb value and shutter speed value, respectively. Perspective view showing the embodiment □Figure 7 ta
) *(h) is the plan view of the black cell in Figure 6, respectively.
Figure 1 (, l is an enlarged cross-sectional view of the main part of the liquid crystal cell, the summary figure (, ) is a cross-sectional view of the main part of another embodiment of the liquid crystal cell display section, and the aga figure (bl is the viewfinder field of view m at this time). Figure 8 (C1 is a diagram showing a modified example of the viewfinder field of view, Figure 9 (a), (bl is a plan view showing a modified example of the display method of the Eurocrystal cell. 4... Mask, 5...Pinto glass, 10.11.
・Glass flat plate, 10R...Transparent resistor, IIT・
...Translucent electrode, 1! ...Liquid crystal substance, 18...Liquid crystal cell, 10 G...Display cell active IV (α) (d) O (h) (L) Third haze (α) (α) (b) CC) Procedural amendment (Mr. Kazuo Wakasugi, Commissioner of the Japan Patent Office, Hogen1, Indication of the case: 1957 Patent Application No. 1381632, Title of the invention: Finder display device equipped with a liquid crystal cell 3, Person making the amendment; Relationship Patent applicant address: 3-30-25 Shimomaruko, Ota-ku, Tokyo; Date of amendment order: January 25, 1982 (shipment date); Specification to be amended; Drawing 7; Contents of amendment (1): Specification No. 15, line 6 [same figure (f), (g
) is” is corrected to “(f) of the same figure”. (2) On page 15, line 7, ``(h) and (i) in the same figure'' is corrected to ``(g) and (h) in the same figure''. (3) Figure 1 is corrected to the attached drawing. 1st spring (C3) 1;1 (8) --1 1561

Claims (1)

[Claims] In a camera finder display device that uses a liquid crystal cell to display shooting information in the finder, the end of the focusing glass is cut out, and the liquid crystal cell is held in the finder by the cutout of the focusing glass. A finder 1-display device characterized by the following.