JP5972622B2 - Electronic viewfinder using a reflective liquid crystal display - Google Patents

Description

  The present invention relates to an electronic viewfinder using a reflective liquid crystal display device.

  Video camera devices for broadcasting stations are mainly electronic viewfinders using small black and white CRTs, and others use color liquid crystal panels and some use liquid crystal panels of a certain size as external monitors.

  Most electronic viewfinders for broadcast stations that are used by looking through an eyepiece lens have a mirror disposed between the eyepiece lens and the device being used, and the optical system is bent.

  FIG. 3 is a front view (A) and a top view (B) of an external view and partial internal perspective of an electronic viewfinder according to the prior art. The lens unit 201 has a lens 202 disposed therein, and includes a diopter adjustment mechanism in the diopter adjustment ring 203. By inserting the lens unit 201 into the lens unit housing 204, the video can be enlarged and viewed. On the optical axis of the lens 202, the mirror unit 205 is arranged at an angle of 45 degrees horizontally with respect to the optical axis on the wall 204 a of the lens unit housing 204, and is fixed to the lens unit housing 204 with screws 206. . The optical axis of the lens 202 is bent in the horizontal and vertical directions by the mirror unit 205, and the screen center of the CRT 207 is arranged so as to be aligned with the optical axis. As a result, the image of the CRT 207 is bent by the mirror unit 205, is in the optical axis direction of the lens 202, and can be enlarged and viewed by the lens 202. The CRT 202 is arranged inside the top case 208 and the bottom case 209 so as to make the most of the space inside the case.

  The concave portion 204b of the lens unit housing 204 has a cylindrical shape. The sliding member 210 is wound around the outer concave portion 204a and the springs (not shown) positioned and fixed to the top case 208 and the bottom case 209 are appropriately pressed. By doing so, the rotational torque is output.

  Various variable VRs (volumes) and various operation SWs (switches) are arranged on the front side of the case. In the variable VR (volume), PEAKING (peaking) 211, CONTRAST (contrast) 212, and BRIGHT (brightness) 213 are arranged at appropriate intervals. Below that, the operation SW (switch) is arranged as TALLY 214 and ZEBRA 215.

  A circuit board unit 216 constituting a circuit for operating the CRT 207 and satisfying various functions as an electronic viewfinder is formed and arranged so as to be along the inner lower surface of the bottom case 209. The design is such that the clearance between the circuit board 216 and the CRT 207 with the top case 208 assembled is secured.

  In addition, the microphone holder unit 217 is fixed to the top case 208 with screws (not shown). The VF cable 218 is electrically connected to the internal circuit board 216, and a connector portion 218a is inserted into the camera body to exchange electrical signals. The bush portion 218b is sandwiched and fixed between the bottom case 209 and the top case 208. A mounting bracket unit 219 attached to the camera body is fixed by screwing with a top case 208 and screws 220.

  FIG. 4 is a perspective view of a video camera apparatus using a conventional electronic viewfinder. An electronic viewfinder 302 is attached to a camera body 301 having a VTR function using a handle portion 301a. The electronic viewfinder 302 has a CRT (not shown) disposed on the optical axis bent in the horizontal and vertical directions by a mirror (not shown) at the tip of the optical axis of the lens unit 303. A rotation mechanism (not shown) having the bent optical axis as a rotation axis is configured inside the rotation unit 304 a of the top case 304. When the cameraman puts the camera body 301 on his shoulder and takes a shooting posture, the cameraman shoots while pressing his eyes against the eyepiece eye cap 303a of the lens unit 303 of the electronic viewfinder 302. At this time, the position of the eye cap 303 for eyepiece, that is, the position of the eye is very important and is a position that meets the demands of the photographer. Various variable VRs (volumes) (not shown) and various operation SWs (switches) (not shown) of the electronic viewfinder 302 are arranged near the electronic viewfinder front surface 302a. These are also important positions determined by the operability of the photographer, and are designed contents that cannot be changed arbitrarily.

Japanese Utility Model Publication No. 62-2847 Japanese Utility Model Publication No. 1-78465 JP 2001-326838 A JP 2008-205589 A

  In recent years, digital performance enhancement related to broadcasting equipment has progressed, and in particular, the realization of high performance and high definition of video and display equipment is remarkable. In addition, there is a demand for higher performance and higher definition. Along with this, video camera devices have also made remarkable progress toward higher performance. However, although there is a high demand for higher performance electronic viewfinders, there are still some parts such as high-definition display devices and colorization support, and these must be realized together with improvements in appearance and visibility. Has become a very important issue.

  In addition, it is required for an electronic viewfinder that realizes high performance and high definition that an electronic viewfinder can be attached to a current video camera apparatus as it is or can be used as it is without changing the usability of the cameraman. Furthermore, proceeding so as not to greatly change the conventional video camera device can reduce the development cost, and can also reduce the product cost by sharing parts. Realizing these is also an important factor.

An electronic viewfinder using a reflective liquid crystal display device, an eyepiece for enlarging and displaying an image of the reflective liquid crystal display device, and a lens barrel for holding and covering the eyepiece and the reflective liquid crystal display device And a circuit board unit for operating the reflective liquid crystal display device, and at least one of peaking (PEAKING), chromaticity (CHROMA), contrast (CONTRAST), and luminance (BRIGHT) of the reflective liquid crystal display device. Two variable volumes, an operation switch of at least one of tally (TALLY), zebra (ZEBRA), and chromaticity (CHROMA) of the reflective liquid crystal display device, and a case for covering the circuit board unit ; It has a rotation axis in the horizontal and vertical direction with respect to the optical axis of the eyepiece, and the lens barrel is attached to the case. And anda rotary mechanism to rotate, the direct view possible positions from the eyepiece on an optical axis of the eyepiece, a display surface of the reflection type liquid crystal display device is disposed, the reflection type liquid crystal display device Is an electronic viewfinder using a reflective liquid crystal display device that can be taken out of the barrel without removing the case for covering the circuit board unit from the barrel .

A part of the lens barrel is removable from the lens barrel, and the reflective liquid crystal display device is taken out of the lens barrel through a part where the lens barrel is partly removed from the lens barrel. an electronic viewfinder using a reflection type liquid crystal display device which is capable.

  A display surface of a reflective liquid crystal display element having a circuit board at the bottom and a front light at the top is disposed at a position where the eyepiece lens can be directly viewed from the eyepiece lens, and in a horizontal and vertical direction with respect to the eyepiece lens optical axis. A rotation mechanism having a rotation axis, a circuit board unit for operating the reflective liquid crystal display device, and peaking (PEAKING), chromaticity (CHROMA), contrast (CONTRAST), and luminance (BRIGHT) of the reflective liquid crystal display device An electronic viewfinder, comprising a variable volume of the liquid crystal display, a tally (ZERY), a zebra (ZEBRA), and a chromaticity (CHROMA) operation switch of the reflective liquid crystal display device, and a case for covering the circuit board unit. High-performance, high-definition and colorization can be realized.

  By fixing the reflective liquid crystal display device to the lens barrel by screwing and making the reflective liquid crystal display device detachable from the electronic viewfinder without removing the case, workability is improved and manufacturing costs are reduced. Finally, the product cost can be lowered.

  Position of eyepiece, position of circuit board unit, peaking (PEAKING), chromaticity (CHROMA), contrast (CONTRAST), brightness (BRIGHT) of reflective liquid crystal display device, reflective liquid crystal display device The position of the tally (TALLY), zebra (ZEBRA) and chromaticity (CHROMA) operation switches are almost the same as the current electronic viewfinder, and the case shape for covering the circuit board unit is almost the same as the current electronic viewfinder. By making it the same, replacement is easy, development costs can be reduced, and product costs can be reduced by sharing parts. Therefore, it is possible to provide a high-performance, high-definition electronic viewfinder that can be replaced with the current electronic viewfinder.

Front view (A), top view (B), and side view (C) of appearance and partial internal perspective of an electronic viewfinder according to an embodiment of the present invention The perspective view of the video camera apparatus using the electronic viewfinder which is one Example of this invention Front view (A) and top view (B) of external view and partial internal perspective of an electronic viewfinder according to the prior art Perspective view of a video camera apparatus using an electronic viewfinder according to the prior art

  An electronic viewfinder using the reflective liquid crystal display device according to the present invention will be described below. FIG. 1 is a front view (A), a top view (B), and a side view (C) of an external view and partial internal perspective of an electronic viewfinder using a reflective liquid crystal display device according to the present invention.

  First, the reflective liquid crystal display device will be described. As shown in FIG. 1C, an FPC circuit board 2 is attached to the back side of the reflective liquid crystal display element 1 and positioned and fixed to a resin base 3. In order to efficiently reflect the light of an LED (not shown) mounted on the circuit board 2, a white resin light guide plate 4 is disposed so as to cover the LED (not shown). The front light housing 5 positioned and fixed by the hook portion 4a of the light guide plate 4 is arranged next to each other. Between the light guide plate 4 and the front light housing 5, a diffusion plate 6 for diffusing light and a polarizing plate 7 for passing only linearly polarized light (P wave) are inserted. A transflective sheet 8 is positioned and affixed to the front light housing 5 in order to efficiently reflect the light that has passed through the polarizing plate 7 to the reflective liquid crystal display element 1. The transflective sheet 8 adopts a type in which WGF (wire grid film) is attached to a glass plate in consideration of improvement in image performance. A part of the light guide plate 4 and the transflective sheet 8 is covered with a light shielding member 9. The FPC circuit board 2 of the reflective liquid crystal display element 1 is connected to the operation circuit board 10 of the reflective liquid crystal display element 1 positioned and fixed on the back side by a connector 10a. The above unit is a reflective liquid crystal display device 11.

  The reflective liquid crystal display device 11 is fitted inside the lens barrel 12 and is fixed by screwing 15 with a screw 15 to an upper and lower same mounting seat housing 14 positioned and fixed to the lens barrel 12 with screws 13. . On the back side of the reflective liquid crystal display device 11, a cap 16 serving as a lid for completely shielding light is fitted into the lens barrel 12. The cap 16 is fixed to the lens barrel 12 with screws 17. The lens barrel 12 and the lens unit housing 18 are integrally fastened with the screws 13 so as to sandwich the mounting seat housing 14. A lens unit 21 having a lens 19 disposed therein and having a diopter adjustment mechanism in the diopter adjustment ring 20 is inserted into the lens unit housing 18 as shown in the figure, and the image of the reflective liquid crystal display device 11 is displayed. Can be enlarged and watched. At this time, the position of the reflective liquid crystal display device 11 is on the optical axis of the lens 19 in the lens unit 21 and is in a state of direct viewing without bending the optical axis by a mirror. As a result, the performance of the high-definition reflective liquid crystal display device 11 can be observed without being deteriorated as much as possible. Further, the reflective liquid crystal display device 11 can be easily removed from the electronic viewfinder and replaced by simply removing the cap 16 on the back side of the reflective liquid crystal display device 11.

  The concave portion 18a of the lens unit housing 18 has a cylindrical shape. The sliding member 22 is wound around the outer concave portion 18a and the springs (not shown) positioned and fixed to the top case 23 and the bottom case 24 are appropriately pressed. By doing so, the rotational torque is output.

  As shown in FIG. 1A, various variable VRs (volumes) and various operation SWs (switches) are arranged on the front side of the case. In the variable VR (volume), PEAKING (peaking) 25, CHROMA (chromaticity) 26, CONTRAST (contrast) 27, and BRIGHT (luminance) 28 are arranged at appropriate intervals. Below that, the operation SW (switch) is arranged as TALLY 29, ZEBRA 30 and CHROMA 31.

  A circuit board unit 32 constituting a circuit for operating the reflective liquid crystal display device 11 and satisfying various functions as an electronic viewfinder is formed and arranged so as to be along the inner lower surface of the bottom case 24. . On top of that, the circuit board unit 33, the circuit board unit 34, and the circuit board unit 35 having the same outer size are screwed and fixed at appropriate intervals with a spacer fitting (not shown) with a screw. The maximum circuit board area can be secured while confirming the clearance between the circuit board unit 35 and the mounted components in the state where the top case 23 is assembled.

  In addition, the microphone holder unit 36 is fixed to the top case 22 with screws (not shown). The VF cable 37 is electrically connected to the internal circuit board unit 32, and a connector portion 37a is inserted into the camera body to exchange electric signals. The bush portion 37b is sandwiched and fixed between the bottom case 24 and the top case 23. The mounting bracket unit 38 attached to the camera body is fixed by screwing with the top case 23 and screws 39.

  FIG. 2 is a perspective view of a video camera apparatus using the electronic viewfinder according to the present invention. An electronic viewfinder 102 is attached to a camera body 101 having a VTR function using a handle 101a. A lens barrel 104 in which a reflective liquid crystal display device is arranged extends straight. Here, the reflection type liquid crystal display device is disposed on the optical axis of the lens unit 103, and is disposed in a positional relationship in which the lens unit 103 is directly viewed. A rotation mechanism portion (not shown) having a rotation axis in the horizontal and vertical directions with the optical axis of the lens unit 103 is formed inside the rotation portion 105 a of the top case 105 from near the middle of the lens barrel 104. When the cameraman puts the camera body 101 on his shoulder and takes a shooting posture, the cameraman shoots while pressing his eyes on the eyepiece eye cap 103a of the lens unit 103 of the electronic viewfinder 102. At this time, the position of the eye cap 103a for eyepiece, that is, the position of the eye is configured to be the same as that of a video camera device using a conventional electronic viewfinder. Various variable VRs (volumes) (not shown) and various operation SWs (switches) (not shown) of the electronic viewfinder 102 are arranged near the front surface 102a of the electronic viewfinder. These are also configured to be at the same position as a video camera device using a conventional electronic viewfinder. As can be seen from these, the electronic viewfinder is a display that maximizes the performance of a high-definition reflective liquid crystal display device and inherits the usability of the conventional electronic viewfinder.

DESCRIPTION OF SYMBOLS 1 Reflective type liquid crystal display element 2 Circuit board 3 Base 4 Light guide plate 4a Hook part 5 Front light housing 6 Diffusion plate 7 Polarizing plate 8 Transflective sheet 9 Light shielding member 10 Operation circuit board 10a Connector 11 Reflective type liquid crystal display device 12 Mirror Tube 13 Screw 14 Mounting seat housing 15 Screw 16 Cap 17 Screw 18 Lens portion housing 18a Recess 19 Lens 20 Diopter adjustment ring 21 Lens unit 22 Slide member 23 Top case 24 Bottom case 25 PEAKING (Peaking)
26 CHROMA (chromaticity)
27 CONTRAST (contrast)
28 BRIGHT (Luminance)
29 TALLY
30 ZEBRA
31 CHROMA (chromaticity)
32 Circuit board unit 33 Circuit board unit 34 Circuit board unit 35 Circuit board unit 36 Microphone holder unit 37 VF cable 37a Connector part 37b Bushing part 38 Mounting bracket unit 39 Screw 101 Camera body 101a Handle part 102 Electronic viewfinder 102a Electronic viewfinder front 103 Lens unit 103a Eye cap for eyepiece 104 Lens barrel 105 Top case 105a Rotating part 201 Lens unit 202 Lens 203 Diopter adjustment ring 204 Lens part housing 204a Wall part 204b Recessed part 205 Mirror unit 206 Screw 207 CRT
208 Top case 209 Bottom case 210 Sliding member 211 PEAKING
212 CONTRAST (contrast)
213 BRIGHT (luminance)
214 TALLY
215 ZEBRA
216 Circuit board unit 217 Microphone holder unit 218 VF cable 218a Connector portion 218b Bushing portion 219 Mounting bracket unit 220 Screw 301 Camera body 301a Handle portion 302 Electronic viewfinder 302a Electronic viewfinder front surface 303 Lens unit 303a Eyepiece for eyepiece 304 Top case 304a Rotating part

Claims (2)

Met electronic viewfinder using reflection-type liquid crystal display device,
An eyepiece for enlarging and displaying an image of the reflective liquid crystal display device;
A lens barrel for holding and covering the eyepiece and the reflective liquid crystal display device ;
A circuit board unit for operating the pre-Symbol reflective liquid crystal display device,
A variable volume of at least one of peaking (PEAKING), chromaticity (CHROMA), contrast (CONTRAST), and luminance (BRIGHT) of the reflective liquid crystal display device;
An operation switch of at least one of tally (TALLY), zebra (ZEBRA), and chromaticity (CHROMA) of the reflective liquid crystal display device;
A case for covering the circuit board unit ;
A rotation mechanism having a rotation axis in a horizontal and vertical direction with respect to the optical axis of the eyepiece, and rotating the lens barrel with respect to the case ;
The display surface of the reflective liquid crystal display device is disposed at a position on the optical axis of the eyepiece that can be directly viewed from the eyepiece ,
The reflective liquid crystal display device can be taken out of the lens barrel without removing the case for covering the circuit board unit from the lens barrel. Electronic viewfinder used. A part of the lens barrel is removable from the lens barrel, and the reflective liquid crystal display device is taken out of the lens barrel through a part where the lens barrel is partly removed from the lens barrel. The electronic viewfinder using the reflective liquid crystal display device according to claim 1 , wherein the electronic viewfinder is capable of being used.

Images