JP3702647B2 - Viewfinder device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a viewfinder device that is effective when used in an electronic viewfinder (hereinafter referred to as EVF) mounted on a camera-integrated VTR.
[0002]
[Prior art]
In recent years, miniaturization of a camera-integrated VTR has progressed, and the color EVF which is a component of the VTR is also required to be miniaturized.
[0003]
In order to reduce the size of the color EVF portion, it is necessary to reduce the area occupied by the printed circuit board, and a double-sided pattern wiring printed board, a multilayer pattern wiring printed board, and a flexible printed board are often used. Therefore, there exists a subject that the cost concerning a printed circuit board becomes expensive.
[0004]
A conventional viewfinder device will be described below.
FIG. 3 is a cross-sectional view showing a configuration of a conventional viewfinder device, and FIG. 4 is a perspective view showing a configuration of a printed circuit board used in the conventional viewfinder device. In the figure, 28 is an EVF main body, 21 is a liquid crystal panel for displaying an image being photographed and an image when a magnetic tape is reproduced, 22 is a flat-emitting fluorescent tube provided on the back side of the liquid crystal panel 21 and emitting light, and 23 is A magnetic flux transformer 24a, which is one of inverter means for generating a high voltage necessary for lighting the flat light emitting fluorescent tube 22, is a first print made of a double-sided pattern printed circuit board on which the flat light emitting fluorescent tube 22 is mounted. A substrate, 24b is a second printed circuit board made of a double-sided pattern printed circuit board on which the magnetic flux transformer 23 is mounted, and 29 is a flexible printed circuit board for connecting the first and second printed circuit boards 24a and 24b. The first and second printed circuit boards 24a and 24b are connected by solder. Reference numeral 25 denotes a reflector that reflects the image displayed on the liquid crystal panel 21 toward the eyecap, and a mirror is usually used. Reference numeral 26 denotes a lens for enlarging the image reflected by the reflector 25, and reference numeral 27 denotes an eye cap attached to one end of the EVF main body 28. The user can view the image by looking into it from the outside.
[0005]
The operation of the conventional viewfinder device configured as described above will be described below.
First, as shown in FIG. 4, the flat light emission type fluorescent tube 22 is mounted on the back surface side of the first printed circuit board 24a made of the double-sided pattern printed circuit board. Further, the magnetic flux transformer 23 is mounted on the surface side of the second printed circuit board 24b. As described above, the first and second printed circuit boards 24a and 24b are each composed of a double-sided pattern printed circuit board, but the planar light emitting fluorescent tube 22 and the magnetic flux transformer 23 are mounted on opposite surfaces.
[0006]
The printed circuit board shown in FIG. 4 is arranged as shown in FIG. That is, the first printed circuit board 24 a is disposed on the back side of the liquid crystal panel 21, and the flat light emitting fluorescent tube 22 is used as the light source of the liquid crystal panel 21. The second printed circuit board 24b is arranged on the back side of the reflector 25. At this time, the flexible printed circuit board 29 is disposed in the gap between the liquid crystal panels 21.
[0007]
In the viewfinder device thus formed, the image displayed on the liquid crystal panel 21 is reflected by the reflector 25 by the lighting of the flat light emission type fluorescent tube 22 and is magnified by the lens. It can be seen from the outside of the cap 27.
[0008]
[Problems to be solved by the invention]
However, in the above conventional configuration, since the double-sided pattern printed boards are used for the first and second printed boards 24a and 24b, there is a problem that the cost is high.
[0009]
The present invention solves the above-mentioned conventional problems, and by using the portion of the inverter circuit on which the magnetic flux transformer and other parts are mounted folded from the flexible portion, the magnetic flux between the flat light emitting fluorescent tube and the inverter circuit is used. It is an object of the present invention to provide a viewfinder device that can realize a printed circuit board on which a transformer and other components are mounted using a single-sided pattern printed circuit board, and can reduce the cost of the printed circuit board.
[0010]
[Means for Solving the Problems]
In order to achieve this object, the viewfinder apparatus of the present invention includes a display means for displaying an image, a light emitting means disposed on the back side of the display means as a light source, and an image displayed on the display means in another direction. Reflecting means for reflecting light, inverter means arranged on the back side of the reflecting means for supplying a voltage to the light emitting means, and a single-sided pattern printed circuit board mounted with the light emitting means and arranged on the back side of the display means A first printed circuit board; a second printed circuit board comprising a single-sided pattern printed circuit board that is mounted along the back surface of the reflective surface of the reflecting means and on which the inverter means is mounted; the first printed circuit board and the first printed circuit board; A flexible printed circuit board that connects the two printed circuit boards, and the flexible printed circuit board is arranged on an upper side of the inverter means.
[0011]
And with such a configuration, the part where the magnetic flux transformer and other parts of the inverter circuit are mounted is folded back from the flexible part, so that the flat light emitting fluorescent tube and the magnetic flux transformer and other parts of the inverter circuit are mounted. Thus, a viewfinder device can be obtained in which the printed circuit board to be realized is a single-sided pattern wiring printed circuit board, and the cost of the printed circuit board can be reduced.
[0012]
The present invention also provides a display means for displaying an image, a light emitting means disposed on the back side of the display means as a light source, a reflecting means for reflecting an image displayed on the display means in another direction, and the reflecting means. Inverter means for supplying a voltage to the light emitting means, a first printed circuit board comprising a single-sided pattern printed circuit board mounted with the light emitting means and arranged on the back side of the display means, and the inverter means And a flexible printed circuit connecting the first printed circuit board and the second printed circuit board, the second printed circuit board comprising a single-sided pattern printed circuit board disposed along the back surface of the reflective surface of the reflecting means. And the flexible printed circuit board is disposed between the second printed circuit board and the reflecting means.
[0013]
And with such a configuration, the part where the magnetic flux transformer and other parts of the inverter circuit are mounted is folded back from the flexible part, so that the flat light emitting fluorescent tube and the magnetic flux transformer and other parts of the inverter circuit are mounted. Thus, a viewfinder device can be obtained in which the printed circuit board to be realized is a single-sided pattern wiring printed circuit board, and the cost of the printed circuit board can be reduced.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
According to the first aspect of the present invention, a display unit for displaying an image, a light emitting unit disposed on the back side of the display unit and serving as a light source, and an image displayed on the display unit are reflected in another direction. A first means comprising a reflecting means, an inverter means disposed on the back side of the reflecting means for supplying a voltage to the light emitting means, and a single-sided pattern printed board mounted with the light emitting means and disposed on the back side of the display means . A printed circuit board; a second printed circuit board comprising a single-sided pattern printed circuit board that is mounted along the back surface of the reflecting surface of the reflecting means; and the first printed circuit board and the second printed circuit board. A flexible printed circuit board connected to the circuit board, the flexible printed circuit board being arranged on the upper side of the inverter means, and with such a configuration, The part on which the magnetic flux transformer and other parts of the inverter circuit are mounted is folded back from the flexible part, so that the single-sided pattern wiring is used for the flat light emitting fluorescent tube and the printed circuit board on which the magnetic flux transformer and other parts of the inverter circuit are mounted. A viewfinder device that can be realized with a printed circuit board and can reduce the cost of the printed circuit board can be obtained.
[0015]
According to a second aspect of the present invention, there is provided display means for displaying an image, light emitting means disposed on the back side of the display means as a light source, and reflection means for reflecting the image displayed on the display means in another direction. A first printed circuit board comprising: inverter means arranged on the back side of the reflecting means for supplying a voltage to the light emitting means; and a single-sided pattern printed board on which the light emitting means is mounted and arranged on the back side of the display means A second printed circuit board comprising a single-sided pattern printed circuit board mounted with the inverter means and disposed along the back surface of the reflection surface of the reflection means , the first printed circuit board, and the second printed circuit board. A flexible printed circuit board, wherein the flexible printed circuit board is disposed between the second printed circuit board and the reflecting means, and such As a result, the printed circuit board on which the planar light-emitting fluorescent tube and the inverter circuit flux transformer and other parts are mounted can be used by folding back the part where the flux transformer and other parts of the inverter circuit are mounted from the flexible part. A viewfinder device that can be realized by a single-sided pattern printed circuit board and can reduce the cost of the printed circuit board can be obtained.
[0016]
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
FIG. 1 is a cross-sectional view showing the configuration of the viewfinder device of the present embodiment, and FIG. 2 is a perspective view showing the configuration of a printed circuit board used in the moving embodiment. In FIG. 1, 10 is an EVF main body, 11 is a liquid crystal panel which is a display means for displaying an image being photographed and an image when a magnetic tape is reproduced, and 12 is a light emitting means which is provided on the back side of the liquid crystal panel 11 and emits light. A flat light emitting fluorescent tube, 14 is a magnetic flux transformer which is one of inverter means for generating a high voltage necessary for lighting the flat light emitting fluorescent tube 12, and 13 is a single surface on which the flat light emitting fluorescent tube 12 is mounted. A first printed circuit board composed of a pattern printed circuit board, 15 a second printed circuit board composed of a single-sided pattern printed circuit board on which a magnetic flux transformer 14 is mounted, and 17 a flexible printed circuit for connecting the first and second printed circuit boards 13 and 15. It is a board | substrate and the both ends are previously connected to the 1st and 2nd printed circuit boards 13 and 15 with the solder. Reference numeral 16 denotes a reflector which is a reflecting means for reflecting an image displayed on the liquid crystal panel 11 toward the eyecap, and a mirror is usually used. Reference numeral 19 denotes a lens for enlarging the image reflected by the reflector 16, and 20 denotes an eye cap attached to one end of the EVF main body 10. The user can view the image by looking into it from the outside.
[0017]
About the viewfinder apparatus of this Embodiment comprised as mentioned above, the operation | movement is demonstrated below,
First, as shown in FIG. 2, the flat light emission type fluorescent tube 12 is mounted on the first printed circuit board 13 made of a single-sided pattern printed circuit board. Further, the magnetic flux transformer 14 is mounted on the second printed circuit board 15. As described above, the first and second printed boards 13 and 15 are each formed of a single-sided pattern printed board, and the flat-emitting fluorescent tube 12 and the magnetic flux transformer 14 are mounted on the same side.
[0018]
The printed circuit board shown in FIG. 2 is arranged as shown in FIG. That is, the first printed circuit board 13 is disposed on the back side of the liquid crystal panel 11, and the flat light emitting fluorescent tube 12 is used as the light source of the liquid crystal panel 11. The second printed circuit board 15 is disposed on the back side of the reflector 16. At this time, the flexible printed circuit board 17 is arranged so as to wrap around the upper side of the magnetic flux transformer 14 through a lateral gap of the liquid crystal panel 11.
[0019]
In the viewfinder device thus formed, the image displayed on the liquid crystal panel 11 is reflected by the reflector 16 by turning on the flat light emission type fluorescent tube 12, and is enlarged by the lens 19, and the enlarged image is displayed. It can be visually observed from the outside of the eye cap 20.
[0020]
As described above, according to the present embodiment, the second printed circuit board 15 on which the magnetic flux transformer 14 of the inverter circuit is mounted is disposed on the opposite surface side of the reflecting surface 16 of the mirror or the like to the image reflecting surface. Since the flexible printed circuit board 17 is disposed so as to pass over the magnetic flux transformer 14, the first and second printed circuit boards 13 and 15 can be formed of single-sided pattern printed circuit boards, thereby reducing the cost. Can do.
[0021]
In the present embodiment, the flexible printed circuit board 17 is disposed so as to pass through the upper part of the magnetic flux transformer 14, but as shown by the flexible printed circuit board 18 shown by the dotted line in FIG. 16 may be arranged between.
[0022]
【The invention's effect】
As described above, the present invention relates to a printed circuit board on which a flat light emitting fluorescent tube and a magnetic flux transformer of an inverter circuit and other parts are mounted, and the problem that the cost is increased due to the double-sided pattern wiring printed circuit board that has been conventionally used. This is solved by using a single-sided pattern printed circuit board, and the cost of the printed circuit board can be reduced.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view illustrating a configuration of a viewfinder device according to a first embodiment of the present invention. FIG. 2 is a perspective view illustrating a configuration of a printed circuit board in the viewfinder device according to the first embodiment of the present invention. FIG. 4 is a perspective view showing the configuration of a printed circuit board in a conventional viewfinder device.
DESCRIPTION OF SYMBOLS 11 Liquid crystal panel 12 Flat light emission type fluorescent tube 13 1st printed circuit board 14 Magnetic flux transformer 15 2nd printed circuit board 16 Reflector 17 Flexible printed circuit board 18 Flexible printed circuit board

Claims (2)

A display means for displaying an image; a light emitting means disposed on the back side of the display means as a light source; a reflecting means for reflecting an image displayed on the display means in another direction; and a back side of the reflecting means. Inverter means for supplying a voltage to the light emitting means; a first printed circuit board comprising a single-sided pattern printed circuit board on which the light emitting means is mounted and disposed on the back side of the display means; and the reflection means mounted on the inverter means A second printed circuit board composed of a single-sided pattern printed circuit board arranged along the back surface of the reflecting surface of the means, and a flexible printed circuit board connecting the first printed circuit board and the second printed circuit board, The viewfinder apparatus, wherein the flexible printed circuit board is arranged on an upper side of the inverter means. A display means for displaying an image; a light emitting means disposed on the back side of the display means as a light source; a reflecting means for reflecting an image displayed on the display means in another direction; and a back side of the reflecting means. Inverter means for supplying a voltage to the light emitting means; a first printed circuit board comprising a single-sided pattern printed circuit board on which the light emitting means is mounted and disposed on the back side of the display means; and the reflection means mounted on the inverter means A second printed circuit board composed of a single-sided pattern printed circuit board arranged along the back surface of the reflecting surface of the means, and a flexible printed circuit board connecting the first printed circuit board and the second printed circuit board, The viewfinder device, wherein the flexible printed circuit board is disposed between the second printed circuit board and the reflecting means.

Images