JPH04333035A - Data imprinting device for camera - Google Patents

Abstract

PURPOSE:To imprint imprinting data without having irregularities and to miniaturize and a thin device by disposing a light source in close proximity to the back part of a liquid crystal display element. CONSTITUTION:An LED mold resin 3 is provided with a projecting part, and a circuit substrate 2 has a hole. The resin 3 is mounted so as to bury the projection in the circuit substrate 2, and precisely fixed. At this time, the projecting part of the mold resin 3 is extremely escaped toward the circuit substrate 2 and the upper frame 1, and a substrate pressing part is thinned, to make the device thin. Then, an LED chip 4 has size corresponding to that of the display data 6 of the liquid crystal display element 5, and is installed on the back part of the liquid crystal element 5. Thus, a picture point light source is obtained, as the light source, and the data part of the liquid crystal display element 5 is irradiated with a parallel luminous flux, not as a diffusing luminous flux. Therefore, the data display part 6 is uniformly irradiated with light, and imprinting quality is improved. Accompanying with the fact, the length of an optical path can be shortened, an optical slit and a reflecting plate can be abolished, and the device can be miniaturized and thinned.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data imprinting device for a camera, which irradiates a liquid crystal display element with light and utilizes the transmitted light.

0002

2. Description of the Related Art A data imprinting device for a camera conventionally has a light path from a light source 12 fixed to a circuit board 12 to a liquid crystal display element 15 guided by a lower frame 9, as shown in FIG.
An optical path slit 10 and a reflecting plate 11 are provided, and the scattered light is cut by the optical path slit 10 and is reflected by 90 degrees by the reflecting plate 11 to imprint data corresponding to the content displayed on the liquid crystal display element 5 onto the film 8. It is something that

0003

However, in the above-mentioned conventional technology, since the light source 12 is a point light source as shown in FIG. When the axis 17 is placed, the data display section 20
Diffused light having an α angle with respect to the optical axis 17 is irradiated onto both ends of the film, and is projected onto the film. Therefore, compared to the center part, both ends are not correctly projected due to the diffusion of light, and the center part is bright and both ends are dark.

For the above reasons, in order to ensure imprint quality, the distance from the light source 12 to the liquid crystal display element must be increased,
It is necessary to reduce the spread of the α angle at both ends as much as possible, which also poses the problem of increasing the size of the device.

SUMMARY OF THE INVENTION The present invention is intended to solve these problems, and its objects are to improve the quality of data imprinted onto film in a camera imprinting device and to reduce the size of the device.

[0006]

[Means for Solving the Problems] The present invention comprises at least a light source, a transmissive liquid crystal display element, and a control circuit for driving the transmissive liquid crystal display element, and the light emitted from the light source is displayed on the transmissive liquid crystal display element. What is claimed is: 1. A data imprinting device for a camera in which the data portion transmitted through the light exposes a film surface, characterized in that the light source is disposed immediately behind a transmissive liquid crystal display element.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the camera data imprinting device of the present invention will be explained below based on the illustrated embodiments.

FIG. 1 is a structural diagram showing an embodiment of the present invention. First, the LED mold resin 3 is provided with a protrusion, and the circuit board 2 is provided with a hole. The protrusion is embedded in the circuit board 2 and is mounted with high accuracy. Therefore, the thickness can be reduced by letting the protrusions of the molded resin 3 escape to the circuit board 2 and the upper frame 1 as much as possible and making the board holding part thinner.

Next, the LED chip 4 is connected to a liquid crystal display element 5.
The display data 6 has a size corresponding to that of the display data 6, and is installed behind the liquid crystal display element 5. The conventional light source was a point light source, but it becomes a pixel point source, and the data portion of the liquid crystal display element 5 is irradiated with a parallel light beam 6 instead of a diffused light beam. Therefore, the data display area 6 is uniformly irradiated with light, the problem of brightness at the center and darkness at both ends is solved, and the imprint quality is dramatically improved.

Furthermore, in the conventional device, a certain distance is required between the light source and the liquid crystal display element 15 in order to reduce the diffusion of the α angle with respect to the optical axis 14, and a reflector is used to reflect the light. Bending by 90 degrees eliminates the need for miniaturization in conventional devices, and it also eliminates diffuse reflection in the optical path due to scattered light, making it possible to eliminate optical path slits.
The device itself has become smaller and thinner.

[0011]

As described above, according to the present invention, by using the light source as an image point source, display data is uniformly imprinted and imprint quality is improved. Accordingly, the optical path length can be shortened, the optical path slit and the reflecting plate can be eliminated, and the device can be made smaller and thinner.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the invention and shows a structural diagram.

[Figure 2]

FIG. 3 shows a conventional structural diagram.

[Explanation of symbols]

1 Upper frame 2　Circuit board 3 LED mold resin 4 LED chip 5 Liquid crystal display element 6 Data display part 7 Parallel light flux 8 Film 9 Lower frame 10 Optical path slit 11 Reflector 12 Light source 13 Luminous flux 14 Optical axis

Claims (1)

[Claims] Claim 1: A display device comprising at least a light source, a transmissive liquid crystal display element, and a control circuit for driving the transmissive liquid crystal display element, wherein the data portion displayed on the transmissive liquid crystal display element is transmitted with light emitted from the light source. 1. A data imprinting device for a camera which exposes a film surface by transmitting light, characterized in that the light source is installed immediately behind a transmissive liquid crystal display element.