JP3733744B2 - Liquid crystal device, camera data copying device and camera - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid crystal device that forms an optical image by controlling the alignment of liquid crystal. The present invention also relates to a camera data copying apparatus configured using the liquid crystal device. The present invention also relates to a camera configured using the camera data copying device.
[0002]
[Prior art]
Cameras for photographing people, landscapes, etc. are widely known. Some cameras include a device for writing data such as date and day of the week in a photographed image, that is, a camera data copying device.
[0003]
As this data copying device for a camera, a device having a liquid crystal device for forming a light image corresponding to a data image such as a date and a casing for supporting the liquid crystal device so as to face a photographic film is known. Yes.
[0004]
Further, as a liquid crystal device used here, conventionally, a pair of substrates facing each other, a liquid crystal sealed between the substrates, a light source that emits light from the outside of the substrates toward the substrates, A segment electrode formed on one of the substrates, and a light shielding pattern formed on any of the substrates to shield a region where the segment electrode is not provided (that is, a non-segment region). Things are known.
[0005]
[Problems to be solved by the invention]
However, in the conventional liquid crystal device, as shown in FIG. 6, the outer edge 52 a of the segment electrode 52 formed on one surface of the substrate 51 and the light shielding pattern 53 formed on the opposite surface of the substrate 51. The segment electrode 52 and the light shielding pattern 53 were formed on the surface of the substrate 52 so as to coincide with the outer edge 53a. On the other hand, in a liquid crystal device used for a camera data copying device or the like, a point light source is often used as a light source. Therefore, light emitted from the point light source is incident on the segment electrode 52 from an oblique direction. It was.
[0006]
As described above, in the conventional liquid crystal device, light enters the segment electrode 52 from an oblique direction, and the segment electrode 52 and the light shielding pattern are arranged so that the outer edge 52a of the segment electrode 52 and the outer edge 53a of the light shielding pattern 53 coincide with each other. Since both of them are formed, a light-shielding shift occurs due to the thickness of the substrate 51. Therefore, light leaks from a place where the light must be shielded as in the area A in FIG. As described above, there has been a phenomenon that light forming an optical image through the segment electrode 52 is accidentally shielded. When such a phenomenon occurs, there arises a problem that a visible image displayed on the liquid crystal device is deformed or missing.
[0007]
The present invention has been made in view of the above problems, and an object of the present invention is to improve the light shielding accuracy by the light shielding pattern and to form a clear light image.
[0008]
[Means for Solving the Problems]
(1) In order to achieve the above object, a liquid crystal device according to the present invention includes a pair of substrates facing each other, a liquid crystal sealed between the substrates, and facing the substrates from the outside of the pair of substrates. A light source that emits light, a segment electrode formed on one of the pair of substrates, and a light-shielding pattern formed on one of the pair of substrates to shield a region other than the segment electrode In the liquid crystal device, the light source is an LED that forms a point light source, and the light shielding pattern and the segment electrode are arranged so as to be displaced in correspondence with the optical path of light from the light source, and the positional deviation thereof The size is relatively small in the light shielding pattern at a position close to the light source and relatively large in the light shielding pattern at a position far from the light source.
[0009]
According to this liquid crystal device, light incident from an oblique direction into a non-segment area where no segment electrode is present can be reliably shielded by the light shielding pattern, and light incident from an oblique direction into the segment area where the segment electrode is present is shielded. Therefore, a clear light image free from deformation or chipping can be obtained on the light emission side.
[0010]
(2) The light shielding pattern and the segment electrode can be formed on both the front and back surfaces of the same substrate, or each can be formed on the surface of a different substrate. However, if they are formed on the surfaces of different substrates, a large gap is generated between the light shielding pattern and the segment electrode, and it is considered that it is difficult to align the two. On the other hand, if the light shielding pattern and the segment electrode are formed on the front and back of the same substrate, the distance between the two is only the thickness of the substrate, that is, the minimum distance. Alignment is easy.
[0011]
(3) Next, a camera data copying device according to the present invention is a camera data copying device that exposes a data image on a photographic film, and a liquid crystal device that forms a light image corresponding to the data image; A camera data copying device having a casing for supporting the liquid crystal device so as to face the photographic film, wherein the liquid crystal device is the liquid crystal device according to (1) or (2).
[0012]
According to the liquid crystal device described in the above (1) and (2), a clear light image without deformation or chipping can be obtained. If a camera data copying device is configured using this, a date or the like can be obtained. An optical image of data can be clearly formed on a photographic film.
[0013]
(4) Next, a camera according to the present invention is a camera having a film conveyance path for conveying a photographic film and a camera data copying device disposed opposite to the film conveyance path. The data copying device is the camera data copying device described in (3) above.
[0014]
According to the camera data imprinting device described in (3) above, since the optical image of the data such as the date can be clearly formed on the photographic film as described above, the data such as the date can be clearly printed in the completed photograph. Is done.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 5 shows an embodiment of a camera according to the present invention. This camera is for a body 3 to which a lens optical system 1 and a shutter button 2 are attached, a film transport path 4 formed in the body 3, and a camera disposed opposite to the film transport path 4 And a data copying device 6. A film 7 is intermittently sent to the film transport path 4.
[0016]
As shown in FIG. 2, the camera data copying device 6 includes a first casing 11 and a second casing 12 that are assembled with a circuit board 8 interposed therebetween. A display liquid crystal device 13 and a reflection mirror 14 are attached to the first casing 11, an LED 16 acting as a point light source is attached to the circuit board 8, and a transfer liquid crystal device 17 is attached to the second casing 12. It is done. The visible image display surface of the display liquid crystal device 13 is exposed to the outside of the camera body 3 in FIG. On the other hand, the visible image display surface of the imprinting liquid crystal device 17 is positioned to face the film transport path 4. As shown in FIG. 3, the light emitted from the LED 16 is reflected by the reflection mirror 14 to illuminate the image capturing liquid crystal device 17.
[0017]
As shown in FIG. 1, the imprinting liquid crystal device 17 includes a pair of substrates 18 a and 18 b that are bonded together by a sealing material 21 and face each other, and a liquid crystal 19 that is sealed between the substrates. The substrates 18a and 18b are formed of, for example, a glass substrate. A common electrode 22 is formed on the inner surface of the substrate 18b on which light from the LED 16 is incident, and an alignment film 23 is further formed thereon. A segment electrode 24 is formed on the inner surface of the substrate 18a on the side from which light is emitted, and an alignment film 26 is further formed thereon. The alignment films 23 and 26 are subjected to a uniaxial alignment process, for example, a rubbing process. For example, as shown in FIG. 4, the segment electrodes 24 are arranged so that numbers indicating the date can be expressed.
[0018]
In FIG. 1, a polarizing plate 27 is adhered to the outer surface of the substrate 18b on the light source side. On the other hand, a light shielding pattern 28 is formed on the outer surface of the substrate 18a on the light emitting side, and a polarizing plate 29 is further adhered thereon. The light shielding pattern 28 is formed in order to prevent light from leaking from a region where the segment electrode 24 is not formed, that is, a non-segment region, and is formed by, for example, Ni (nickel) plating.
[0019]
In the conventional imprinting liquid crystal device, as shown in FIG. 6, the light shielding pattern 53 is arranged so as to exactly match the non-segment area immediately behind the non-segment area where the segment electrode 52 is not provided. It was. On the other hand, the light shielding pattern 28 of the present embodiment is not provided immediately behind the non-segment area so as to exactly match the non-segment area, but as shown in FIG. It is formed with a positional deviation of the dimension δ.
[0020]
This misalignment dimension δ is not set to a constant value for all the light shielding patterns 28, but is set individually according to the optical path R of the illumination light supplied from the LED 16, as shown in the figure. Specifically, the light shielding pattern 28 is formed such that the outer edge of the light shielding pattern 28 comes where the light beam passing through the outer edge of the segment electrode 24 reaches a position where the light shielding pattern 28 is to be provided. In this case, since the light from the LED 16 that is a point light source becomes divergent light, the positional deviation dimension δ relating to the light shielding pattern 28 located near the LED 16 is small, and the positional deviation dimension is increased as the position of the light shielding pattern 28 is further away from the LED 16. δ increases.
[0021]
In FIG. 1, the light beam from the LED 16 to the light shielding pattern 28 is drawn in a straight line, but in reality, it may be refracted at the substrate 18a, the substrate 18b, or the like. Accordingly, when determining the outer edge position of the light shielding pattern 28 in such a case, it is desirable to set the outer edge position of the light shielding pattern 28 in consideration of the light beam being refracted.
[0022]
In the present embodiment, since the light shielding pattern 28 is arranged with the position shifted with respect to the segment electrode 24 in accordance with the rules as described above, even if light is incident on the liquid crystal device 17 from an oblique direction, the light shielding pattern 28 causes non-segmentation. Only the area can be shielded accurately.
[0023]
The present invention has been described with reference to the preferred embodiments. However, the present invention is not limited to the embodiments, and various modifications can be made within the scope of the invention described in the claims.
[0024]
For example, the liquid crystal device according to the present invention is not limited to being used in a camera data copying device, and can be applied to all liquid crystal devices that need to shield non-segment areas with a light shielding pattern. Further, the pattern of the segment electrode is not limited to a number such as a date, but may be a character, a picture, or the like.
[0025]
【The invention's effect】
According to the liquid crystal device, the camera data copying device, and the camera according to the present invention, the light incident on the non-segment region from the oblique direction can be surely shielded by the light shielding pattern, and the light incident on the segment region from the oblique direction is Since light is not blocked by the light blocking pattern, a clear light image free from deformation or chipping can be obtained on the light emission side.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view schematically showing an embodiment of a liquid crystal device according to the present invention.
FIG. 2 is a perspective view showing an embodiment of a camera data copying device according to the present invention.
3 is a cross-sectional view showing a cross-sectional structure according to the ZZ line of FIG. 2;
4 is a plan view of the liquid crystal device of FIG. 1. FIG.
FIG. 5 is a perspective view showing an embodiment of a camera according to the present invention.
FIG. 6 is a cross-sectional view showing a main part of a conventional liquid crystal device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lens optical system 2 Shutter button 3 Camera body 4 Film conveyance path 6 Camera data copying device 7 Film 8 Circuit board 11 1st casing 12 2nd casing 13 Display liquid crystal device 14 Reflection mirror 16 LED (light source)
17 Liquid crystal device 18a for printing, 18b Substrate 19 Liquid crystal 21 Sealing material 22 Common electrode 23, 26 Alignment film 24 Segment electrode 27, 29 Alignment film 28 Light shielding pattern

Claims (4)

A pair of substrates facing each other, a liquid crystal sealed between the substrates, a light source that emits light from outside the pair of substrates toward the substrates, and one of the pair of substrates. In a liquid crystal device having a segment electrode and a light-shielding pattern formed on one of the pair of substrates to shield the region other than the segment electrode,
The light source is an LED that forms a point light source, and the light-shielding pattern and the segment electrode are displaced in position corresponding to the optical path of light from the light source, and the positional displacement dimension is close to that of the light source. A liquid crystal device, wherein the light shielding pattern at a position is relatively small and the light shielding pattern at a position far from the light source is relatively large.   2. The liquid crystal device according to claim 1, wherein the light shielding pattern and the segment electrode are formed on the front and back of the same substrate. A data copying device for a camera that exposes a data image on a photographic film,
In a data copying device for a camera, comprising: a liquid crystal device that forms an optical image corresponding to the data image; and a casing that supports the liquid crystal device so as to face the photographic film.
3. The camera data copying device according to claim 1, wherein the liquid crystal device is the liquid crystal device according to claim 1. In a camera having a film transport path for transporting photographic film and a camera data copying device disposed opposite to the film transport path,
The camera data copying device is a camera data copying device according to claim 3.

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