JP5720410B2 - Imaging device - Google Patents

Description

  The present invention relates to a finder unit and an imaging apparatus.

There is known a camera in which a liquid crystal display element is provided on an upper surface of a focusing plate on which subject light that has passed through a photographing lens unit forms an image, and an AF area or the like is displayed superimposed on the subject optical image.
[Prior art documents]
[Patent Literature]
[Patent Document 1] JP 2009-253899 A

  However, components such as a pentaprism and a shutter unit are integrated in the vicinity of the focus plate, and wiring with a high-performance display element is complicated.

  The finder unit according to the first aspect of the present invention includes a focus plate that forms an image of the subject luminous flux reflected by the mirror unit, a display panel that displays information superimposed on the optical image of the subject formed on the focus plate, A support part for supporting the display panel, which is provided with a hole on the side where the subject luminous flux is incident on the mirror part, and is inserted into the hole at a position displaced toward the peripheral side of the subject luminous flux and connected to the display panel. A flexible substrate. Moreover, the imaging device in the 2nd aspect of this invention is equipped with said mirror part and a finder unit.

  It should be noted that the above summary of the invention does not enumerate all the necessary features of the present invention. In addition, a sub-combination of these feature groups can also be an invention.

It is a disassembled perspective view of the main components which comprise the optical finder periphery in the single-lens reflex camera which concerns on this embodiment. It is a perspective view which shows the relative positional relationship of the main components at the time of an assembly. It is a perspective view which shows the relative positional relationship of the main components of a pentabox periphery. It is a perspective view at the time of observing from the entrance opening part side with respect to the perspective view of FIG. It is sectional drawing of the part by which the flexible substrate was penetrated among the hole parts. It is a figure which shows a mode that some components were removed with respect to the perspective view of FIG. It is a figure which shows the relative positional relationship of a display panel and a light guide.

  Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the invention according to the claims. In addition, not all the combinations of features described in the embodiments are essential for the solving means of the invention.

  FIG. 1 is an exploded perspective view of main components constituting the periphery of the optical viewfinder in the single-lens reflex camera according to the present embodiment. The single-lens reflex camera according to the present embodiment is a type of digital camera that is equipped with an interchangeable shooting lens and includes an optical viewfinder that can observe a subject image as an optical image.

  The single-lens reflex camera includes a lens mount 10 and a lens substrate 12 as main components constituting the periphery of the optical viewfinder. The lens mount 10 is a fixing portion that fixes a replaceable photographing lens, and, for example, a bayonet method is adopted. The lens mount itself is fixed to a front plate (not shown). Similarly to the lens mount 10, the lens substrate 12 is a substrate fixed to the front plate. The lens substrate 12 includes a circuit pattern in which, for example, a diaphragm terminal slides from the photographing lens side when the photographing lens is fixed to the lens mount 10. Therefore, as shown in the figure, the lens substrate 12 includes an arc-shaped partial shape concentric with the circular opening of the lens mount 10 on which the subject light beam enters.

  The single-lens reflex camera includes a mirror unit 20, a pentabox 30, and a pentaprism 60 as main components constituting the periphery of the optical viewfinder. The mirror unit 20 is pivotally supported by the front plate with a direction orthogonal to the optical axis of the incident subject light beam as a rotation axis. The mirror unit 20 reflects the incident subject light flux in the direction of the pentaprism 60 in the illustrated oblique state. In addition, the mirror unit 20 guides the incident subject light beam in the direction of the imaging element (not shown) in a retracted state where it does not intersect the subject light beam.

  The pentabox 30 is a support member that houses and supports the pentaprism 60. The pentabox 30 itself is supported and fixed by the front plate. The pentaprism 60 is an optical element that inverts an incident subject optical image and allows a user to observe it as an erect image. Of course, a hollow pentamirror having a similar function by combining a plurality of mirrors may be used. Therefore, as shown in the figure, the pentabox 30 includes an incident opening 32 for allowing the subject light flux to enter the pentaprism 60 and an exit opening 33 for guiding the subject light flux emitted by the pentaprism 60 to the user.

  The single-lens reflex camera includes a focus plate 40, a display panel 50, and a closing plate 80 as main components constituting the periphery of the optical viewfinder. The focus plate 40 is a diffusion plate supported by the pentabox 30 so as to be in a conjugate position with respect to the light receiving surface of the image sensor. Therefore, the user can observe the subject optical image that is reflected by the mirror unit 20 and forms an image on the focus plate 40 through the pentaprism 60.

  The display unit of the display panel 50 transmits the subject optical image when the information is not displayed. On the other hand, in the information display state, the information is displayed superimposed on the subject optical image formed on the focus plate 40. For example, the liquid crystal of the segment provided corresponding to the focus detection area is in a diffusion state, and a specific display pattern can be visually recognized by overlapping the subject optical image. Specifically, a display pattern as information is superimposed on the subject optical image and guided to the user side via the pentaprism 60. Examples of information to be displayed include the remaining battery capacity, horizontal and vertical indices, exposure values, etc., in addition to the focus detection area. The detailed structure of the display panel will be described later.

  The display panel 50 is inserted into the hole 31 provided on the side surface of the pentabox 30 on the side where the subject light beam is incident on the mirror unit 20, and is supported by the pentabox 30. At this time, the blocking plate 80 closes the hole 31 in which the display panel 50 is inserted in order to block stray light and dust entering the pentabox 30 from the gap between the hole 31 and the display panel 50.

  The single-lens reflex camera includes a penta substrate 70, a light guide 90, and an LED 92 as main components constituting the periphery of the optical viewfinder. The penta substrate 70 is disposed adjacent to the upper surface of the penta prism 60 opposite to the side of the surface supported by the penta box 30 (the incident surface side facing the focus plate 40). Various circuits are integrated on the penta substrate 70, and the display panel 50 is also electrically connected to the penta substrate 70, as will be described later. The light guide 90 is disposed on a side surface of the pentabox 30 that is orthogonal to both surfaces on which the entrance opening 32 and the exit opening 33 are provided. The light guide 90 introduces irradiation light of the LED 92 as an illumination unit to the display panel 50. A specific configuration will be described later.

  FIG. 2 is a perspective view showing the relative positional relationship of main components around the optical viewfinder during assembly. As described above, the lens substrate 12 has an arc-shaped partial shape, and the flexible substrate 51 constituting the display panel 50 is drawn out from the vicinity of the end of the arc shape. The end of the flexible substrate 51 is connected to a connector 72 provided on a connection portion 71 extending from the penta substrate 70.

  FIG. 3 is an assembled perspective view of the main components around the pentabox 30 when the lens substrate 12 and its related components and the closing plate 80 are removed from the main components in FIG. As described above, the hole 31 is provided on the side surface of the lens mount 10 on which the subject luminous flux is incident. At the time of assembly, the display panel 50 is inserted. That is, the hole 31 has a linear shape in accordance with the length of the long side of the display panel 50. In this case, the distance of the subject luminous flux from the optical axis is short near the center of the hole 31 and long near both ends. That is, in the relative relationship with the lens substrate 12, when viewed from the lens mount 10 side, the vicinity of the center of the hole portion 31 overlaps with the arc-shaped inner peripheral portion of the lens substrate 12, so The vicinity and the arc-shaped outer periphery of the lens substrate 12 overlap.

  At this time, if the flexible substrate 51 is pulled out from the vicinity of the center of the hole portion 31, interference with the lens substrate 12 increases, and excessive stress is applied to the flexible substrate 51. In addition, if the flexible substrate 51 has a shape that extends over the entire length of the hole 31, the restriction on handling becomes large. Therefore, as shown in the drawing, the flexible substrate 51 is desirably arranged and shaped so as to be drawn out in the vicinity of the end portion of the hole portion 31, in other words, in the hole portion 31 at a position displaced to the peripheral side with respect to the subject light flux.

  FIG. 4 is a perspective view of the perspective view of FIG. 3 when observed from the incident opening 32 side. The focus plate 40 is lifted in parallel from below the entrance opening 32 and is abutted against the pentabox 30 to be fixed. On the other hand, the display panel 50 is inserted through the hole 31 provided on the side surface and fixed to the pentabox 30 as described above. Therefore, the focus plate 40 and the display panel 50 are disposed adjacent to each other in this order from the mirror unit 20 toward the incident surface of the pentaprism 60. Since the diffusing surface of the focus plate 40 is a primary image formation surface of the subject light beam, information on the display panel 50 arranged in the vicinity thereof can also be satisfactorily observed by the user.

  FIG. 5 is a cross-sectional view of a portion where the flexible substrate 51 is inserted in the hole 31 of the pentabox 30. The display panel 50 includes a first transparent plate 52 and a second transparent plate 53 that enclose a liquid crystal layer constituting a segment. These transparent plates are provided with transparent electrodes, and connect the liquid crystal layer and the driving IC 54. The drive IC 54 is placed on the surface of the first transparent plate 52 by COG (Chip On Glass). More specifically, the first transparent plate 52 is mounted in contact with the opposing surface facing the second transparent plate 53 among the surfaces of the first transparent plate 52. The drive IC 54 is connected to the flexible substrate 51 and drives the liquid crystal layer according to a drive signal input via the flexible substrate 51.

  Further, the drive IC 54 is disposed so that at least a part of the drive IC 54 fits in the thickness of the hole 31 when the display panel 50 is inserted and fixed in the hole 31. That is, the position of the assembled driving IC 54 is at least partially coincident with the hole 31 in the depth direction of the hole 31. Further, the height of the drive IC 54 is lower than the height of the second transparent plate 53. That is, the height in the short side direction of the hole portion 31 provided in a substantially rectangular shape is higher than the height of the first transparent plate 52 and the second transparent plate 53 overlapped even when the display panel 50 is inserted. Is also sufficient. By adopting such a relative positional relationship, the end portion of the display panel 50 does not protrude from the hole 31 and the display surface of the display panel 50 can be made larger. It is preferable from the viewpoint.

  FIG. 5 shows a state where the closing plate 80 closes the hole 31 after the display panel 50 is inserted and fixed in the hole 31. Specifically, the closing plate 80 has a gap set in consideration of the radius of curvature at which the flexible substrate 51 is bent in the direction of the pentaprism 60 at the insertion position where the flexible substrate 51 connected to the drive IC 54 is inserted. The hole 31 is closed away from the pentabox 30 by this amount. At other positions, the hole 31 is closed in contact with the pentabox 30. The closing plate 80 is formed by bending the insertion position by, for example, pressing.

  FIG. 6 is a diagram illustrating a state in which the pentaprism 60 and the penta substrate 70 are removed from the perspective view of FIG. 3. As described above, the pentabox 30 has an open box shape that accommodates and supports the pentaprism 60, and positioning portions are provided at various locations to support the focus plate 40, the display panel 50, the light guide 90, and the like. , Having a fixed part or the like. Furthermore, it has a holding function for holding the eyepiece optical system outside the exit opening 33. For supporting and fixing each component, a support member, a buffer member, a pressing member, a screw, an adhesive, or the like can be appropriately used between each component and the pentabox 30. The pentabox 30 is integrally formed by molding, for example. Thereby, the relative positional relationship of the optical components from the focusing plate 40 to the eyepiece optical system can be kept strictly.

  FIG. 7 is a diagram illustrating a relative positional relationship between the display panel 50 and the light guide 90. The light guide 90 causes the irradiation light to enter the short side of the display panel 50, that is, the side including the short side perpendicular to the long side from which the flexible substrate 51 is drawn out of the display panel 50. Specifically, the light guide 90 makes the irradiation light from the LED 92 incident on the incident surface 93, reflects the light emitted from the LED 92 toward the side surface of the display panel 50, and emits the light from the emission surface 95. Irradiation light incident on the display panel 50 is diffused by the liquid crystal in the diffusion state and visually recognized by the user. Therefore, the control unit of the single-lens reflex camera can improve the visibility of the display pattern by turning on the LED 92 in a situation where the surrounding environment is dark.

  In the above embodiment, as an example of the display panel 50, a liquid crystal panel in which a liquid crystal layer is sealed by two transparent plates and a specific display pattern is displayed has been described as an example. However, as the display panel 50, as long as it is a transmissive display panel, a liquid crystal panel capable of displaying arbitrary information by a dot matrix can be adopted, and for example, an organic EL panel other than the liquid crystal panel can be adopted. . In the above description, a digital camera is adopted as an example of a single-lens reflex camera. However, the concept according to this embodiment can be applied to a film camera.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Lens mount, 12 Lens board | substrate, 20 Mirror part, 30 Penta box, 31 Hole part, 32 Incident opening part, 33 Injecting opening part, 40 Focus board, 50 Display panel, 51 Flexible board, 52 1st transparent board, 53 1st 2 transparent plate, 54 drive IC, 60 penta prism, 70 penta substrate, 71 connection part, 72 connector, 80 closing plate, 90 light guide, 92 LED, 93 entrance surface, 94 reflection surface, 95 exit surface

Claims (6)

A mirror that reflects the subject luminous flux;
A focusing plate, wherein the subject light flux reflected on the mirror portion is imaged,
A liquid crystal layer; two transparent substrates that enclose the liquid crystal layer; and a driving IC that is mounted on one of the opposing surfaces of the two transparent substrates and drives the liquid crystal layer. A display panel that displays information superimposed on a subject optical image formed on a plate;
A support part for supporting the display panel, wherein a hole is provided on a side where the subject light beam is incident on the mirror part;
Is inserted before Kiana portion and a flexible substrate connected to the display panel,
An imaging apparatus in which at least a part of the driving IC fits in the thickness of the hole portion of the support portion that supports the display panel . The height of the driver IC, the imaging apparatus according to claim 1 lower than the height of the opposing surfaces of the two transparent plates. It said support portion, the imaging apparatus according to claim 1 or 2 also supports the focusing plate. The imaging apparatus according to any one of claims 1-3 having a closing plate for closing the hole so as to be separated from the support portion in the inserting position where the flexible substrate is inserted. A penta part that is supported by the support part and guides the subject optical image and the displayed information to the user side;
A circuit board disposed on the upper surface opposite to the surface supported by the support portion of the penta portion,
The flexible substrate imaging apparatus according to any one of 4 claims 1 connected to the circuit board. An illumination unit that illuminates the display panel;
According to item 1 one of claims 1 to 5, and a light guide portion for introducing the irradiation light from the illumination portion to the side surface including the shorter side perpendicular to the long side of the flexible substrate is pulled out of the display panel Imaging device .

Images