JP2013198146A - Electronic view finder using reflection type liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic view finder with high performance and high definition, which follows a design so that a conventional video camera device is not largely changed.SOLUTION: An electronic view finder includes: an eyepiece for performing enlarged display for an image of a reflection type liquid crystal display device; a lens barrel which is to hold and cover the eyepiece and the reflection type liquid crystal display device; a rotation mechanism section which includes a rotation axis in a horizontal/vertical direction to an eyepiece optical axis; a circuit board unit which can operate the reflection type liquid crystal display device; a variable volume of peaking, chromaticity, contrast and luminance of the reflection type liquid crystal display device; an operation switch of a tally, zebra and chromaticity of the reflection type liquid crystal display device; and a case for covering the circuit board unit. In the view finder, a display face of a reflection type liquid crystal display element is arranged in a position which can directly be viewed from the eyepiece on the eyepiece optical axis.

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 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, and a rotation axis in a horizontal and vertical direction with respect to the optical axis of the eyepiece lens A rotating mechanism having a circuit board unit for operating the reflective liquid crystal display device, and a variable volume of peaking (PEAKING), chromaticity (CHROMA), contrast (CONTRAST), and luminance (BRIGHT) of the reflective liquid crystal display device. And a tally (TALLY), zebra (ZEBRA), and chromaticity (CHROMA) operation switch of the reflective liquid crystal display device, and a case for covering the circuit board unit, and on the optical axis of the eyepiece lens The display surface of the reflective liquid crystal display element is arranged at a position where it can be directly viewed from the eyepiece lens. An electronic viewfinder using the reflection type liquid crystal display device having the Toraito.

  The reflective liquid crystal display device is fixed to the lens barrel by screws, and the reflective liquid crystal display device is detachable from the electronic viewfinder without removing the case for covering the circuit board unit. An electronic viewfinder using the reflective liquid crystal display device is provided.

  As for the position of the eyepiece lens, it is assumed that a mirror is disposed on the eyepiece optical axis in the horizontal direction with an inclination of 45 degrees in the lens barrel, and the eyepiece optical axis is reflected in the horizontal and vertical directions for total reflection. An electronic viewfinder using the reflective liquid crystal display device that is substantially the same position as the electronic viewfinder in which the reflective liquid crystal display device is disposed at an appropriate position on the optical axis.

  As for the position of the circuit board unit, suppose that a mirror is disposed on the optical axis of the eyepiece lens at an inclination of 45 degrees in the horizontal direction within the lens barrel, and the optical axis of the eyepiece lens is reflected in the horizontal and vertical direction for total reflection. Thus, an electronic view finder using the reflective liquid crystal display device that is substantially the same position as the electronic view finder in which the reflective liquid crystal display device is disposed at an appropriate position on the optical axis is provided.

  The position of the variable volume of peaking (PEAKING), chromaticity (CHROMA), contrast (CONTRAST), and luminance (BRIGHT) of the reflective liquid crystal display device is assumed to be set on the optical axis of the eyepiece lens in the lens barrel. An electronic viewfinder that is disposed at an inclination of 45 degrees in the horizontal direction, reflects the optical axis of the eyepiece lens in the horizontal and vertical direction for total reflection, and disposes the reflective liquid crystal display device at an appropriate position on the optical axis; An electronic viewfinder using the reflective liquid crystal display device at substantially the same position is used.

  The positions of the operation switches of the tally (TALLY), zebra (ZEBRA), and chromaticity (CHROMA) of the reflective liquid crystal display device are assumed to be 45 degrees in the horizontal direction on the optical axis of the eyepiece lens in the lens barrel. The eyepiece lens optical axis is reflected in the horizontal and vertical directions for total reflection, and the reflection type liquid crystal display device is disposed at an appropriate position on the optical axis. An electronic viewfinder using the reflective liquid crystal display device is provided.

  The case for covering the circuit board unit has a horizontal and vertical direction in which a mirror is disposed in the lens barrel with a 45-degree horizontal inclination on the eyepiece optical axis, and the eyepiece optical axis is totally reflected. The electronic view has the same shape as an electronic viewfinder in which the reflective liquid crystal display device is disposed at an appropriate position on the optical axis and the mirror is mounted on the camera body. An electronic view finder using the reflection type liquid crystal display device in which the operability is completely compatible with the finder.

  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 optical axis of the eyepiece lens. 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 (7)

In an electronic viewfinder using a reflection type liquid crystal display device equipped with a reflection type liquid crystal display element on a circuit board and having a front light on the reflection type liquid crystal display element,
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, and an axis of rotation in the horizontal and vertical directions with respect to the optical axis of the eyepiece lens Rotating mechanism having a circuit board unit for operating the reflective liquid crystal display device, and changing the peaking (PEAKING), chromaticity (CHROMA), contrast (CONTRAST), and brightness (BRIGHT) of the reflective liquid crystal display device A volume, a tally (TALLY), 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, on the optical axis of the eyepiece A reflective liquid, characterized in that a display surface of the reflective liquid crystal display element is disposed at a position where it can be directly viewed from the eyepiece. Electronic view finder using the display device.   The reflective liquid crystal display device is screwed and fixed to the lens barrel, and the reflective liquid crystal display device can be detached from the electronic viewfinder without removing the case for covering the circuit board unit. An electronic viewfinder using the reflective liquid crystal display device according to claim 1.   As for the position of the eyepiece lens, it is assumed that a mirror is disposed on the eyepiece optical axis in the horizontal direction with an inclination of 45 degrees in the lens barrel, and the eyepiece optical axis is reflected in the horizontal and vertical directions for total reflection. 3. An electronic view using a reflective liquid crystal display device according to claim 1, wherein the electronic view finder is located at substantially the same position as an electronic viewfinder in which the reflective liquid crystal display device is disposed at an appropriate position on the optical axis. Viewfinder.   As for the position of the circuit board unit, suppose that a mirror is disposed on the optical axis of the eyepiece lens at an inclination of 45 degrees in the horizontal direction within the lens barrel, and the optical axis of the eyepiece lens is reflected in the horizontal and vertical direction for total reflection. 4. The reflective liquid crystal display according to claim 1, wherein the reflective liquid crystal display is at substantially the same position as an electronic viewfinder in which the reflective liquid crystal display device is disposed at an appropriate position on the optical axis. Electronic viewfinder using the device.   The position of the variable volume of peaking (PEAKING), chromaticity (CHROMA), contrast (CONTRAST), and luminance (BRIGHT) of the reflective liquid crystal display device is assumed to be set on the optical axis of the eyepiece lens in the lens barrel. An electronic viewfinder that is disposed at an inclination of 45 degrees in the horizontal direction, reflects the optical axis of the eyepiece lens in the horizontal and vertical direction for total reflection, and disposes the reflective liquid crystal display device at an appropriate position on the optical axis; The electronic viewfinder using the reflective liquid crystal display device according to any one of claims 1 to 4, wherein the electronic viewfinder is at substantially the same position.   The positions of the operation switches of the tally (TALLY), zebra (ZEBRA), and chromaticity (CHROMA) of the reflective liquid crystal display device are assumed to be 45 degrees in the horizontal direction on the optical axis of the eyepiece lens in the lens barrel. The eyepiece lens optical axis is reflected in the horizontal and vertical directions for total reflection, and the reflection type liquid crystal display device is disposed at an appropriate position on the optical axis. An electronic viewfinder using the reflective liquid crystal display device according to any one of claims 1 to 5.   The case for covering the circuit board unit has a horizontal and vertical direction in which a mirror is disposed in the lens barrel with a 45-degree horizontal inclination on the eyepiece optical axis, and the eyepiece optical axis is totally reflected. The electronic view has the same shape as an electronic viewfinder in which the reflective liquid crystal display device is disposed at an appropriate position on the optical axis and the mirror is mounted on the camera body. The electronic viewfinder using the reflective liquid crystal display device according to any one of claims 1 to 6, wherein the viewfinder and the operability are completely compatible.

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