Method for manufacturing display device

Abstract

Provided is a method for manufacturing a display device that can easily affix a display panel and can reduce the load applied to the display panel. A method for manufacturing a display device (monitor (15)) rotatably held in an ophthalmic device (10) by a rotation holding mechanism (16) having one or more rotation shafts (C1, C2), the rotation holding mechanism (16) rotatably holding a metal plate (32) covering the rear surface side of a planar display panel (liquid crystal panel (30)), the display panel is adhered (adhesive tape (40)) and fixed to the metal plate (32).

Description

Technical Field

[0001] The present invention relates to a method for manufacturing a display device provided in an ophthalmic device. Background Art

[0002] In ophthalmology, ophthalmic devices are used to obtain (measure, photograph, observe, etc.) various ocular characteristics of the eye under examination, such as the ocular refractive power, intraocular pressure, and the number of corneal endothelial cells. In such ophthalmic devices, a touch panel display device (monitor) is rotatably held on a measuring head that obtains ocular characteristics via a rotation holding mechanism of one axis or two axes (see Patent Document 1). The display device displays an observed image of the eye under examination, the measurement results of ocular characteristics, various setting screens, various operation screens, and the like.

[0003] The display device described in Patent Document 1 has a frame body composed of a rear cover and a front cover, and a liquid crystal panel housed in the frame body. The rear cover is provided in a rotation holding mechanism and covers the back side of the liquid crystal panel. The front cover has a frame shape that exposes a display area within a display surface of the liquid crystal panel and covers the end of the display surface. The liquid crystal panel is a flat display panel and is fixed to both the front cover and the rear cover by screws.

[0004] Prior art literature Patent Literature Patent Document 1: Japanese Patent Application Publication No. 2015-091427 Summary of the invention Problem that the invention aims to solve In recent years, as liquid crystal panels have become smaller and thinner, it is difficult to fix the liquid crystal panels to the front and rear covers using screws. In addition, the frame of the display device of Patent Document 1 is rotated by the inspector when adjusting the position and posture of the display device (the orientation of the display surface). In this case, a large load may be applied to the liquid crystal panel from the front and rear covers of the frame via the screws.

[0005] The present invention has been made in view of such circumstances, and an object of the present invention is to provide a method for manufacturing a display device that can easily perform fixation of a display panel and reduce the load applied to the display panel.

[0006] Means used to solve problems A method for manufacturing a display device for achieving the purpose of the present invention, wherein the display device is rotatably held by a rotation holding mechanism having more than one rotation axis in an ophthalmic device, the rotation holding mechanism holds a plate covering the back side of a planar display panel rotatably, and the display panel is bonded and fixed to the plate.

[0007] According to this method of manufacturing a display device, the display panel can be fixed to the plate by simply bonding it.

[0008] In another aspect of the present invention, in a method for manufacturing a display device, the plate is a metal plate, and one or more conducting members are disposed between the metal plate and the display panel to conduct electricity between the display panel and the metal plate. This can achieve EMC (Electromagnetic Compatibility) countermeasures.

[0009] In another embodiment of a method for manufacturing a display device of the present invention, a plate and a display panel are housed inside a frame having a rear cover and a front cover, wherein the rear cover covers the back side of the plate opposite to the surface facing the display panel, and the front cover exposes a display area of ​​the display surface of the display panel and covers the end of the display surface.

[0010] In the method for manufacturing a display device according to another aspect of the present invention, displacement of the front side of the display surface of the display panel is restricted by the front cover, thereby preventing the display panel from warping.

[0011] In the method for manufacturing a display device according to another aspect of the present invention, the display panel is surface-bonded to the plate, thereby reducing the load applied to the display panel compared to the case where the display panel is fixed to the plate by screws.

[0012] In another aspect of the method for manufacturing a display device of the present invention, at least the left and right end surfaces of the display panel are bonded to the plate, thereby reducing the load applied to the display panel compared to the case where the display panel is fixed to the plate by screws.

[0013] In another embodiment of the method for manufacturing a display device of the present invention, when the direction parallel to the display surface of the display panel is taken as the parallel direction, a limiting member for limiting the displacement of the display panel in the parallel direction relative to the plate is provided on the plate. The displacement of the display panel in the parallel direction relative to the plate can be reliably limited.

[0014] In a method for manufacturing a display device according to another aspect of the present invention, a rotation holding mechanism having one or two rotation axes holds the display device rotatably.

[0015] In the method for manufacturing a display device according to another aspect of the present invention, the display panel is bonded to the plate with an adhesive tape.

[0016] Effects of the Invention The present invention can simply perform the fixing of the display panel and can reduce the load applied to the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a perspective view of the appearance of an ophthalmic device.

[0018] Figure 2 It is a front perspective view of the monitor and the rotation holding mechanism.

[0019] Figure 3 It is a rear perspective view of the monitor and the rotation holding mechanism.

[0020] Figure 4 It is a perspective view showing the structure inside the cover of the horizontal rotation shaft portion.

[0021] Figure 5 yes Figure 2 A cross-sectional view of the monitor along line 5-5.

[0022] Figure 6 It is a perspective view showing a state where the housing is removed from the monitor.

[0023] Figure 7 This is a three-dimensional view of the metal plate before bonding and fixing the LCD panel.

[0024] Figure 8 This is a three-dimensional image of the metal plate after the liquid crystal panel is bonded and fixed.

[0025] Fig. 9 It is a cross-sectional view of the liquid crystal panel and the metal plate along the left-right direction.

[0026] Fig.10 It is a cross-sectional view of the liquid crystal panel and the metal plate along the vertical direction. DETAILED DESCRIPTION

[0027] [Structure of Ophthalmic Device 10] Figure 1 1 is a perspective view of the appearance of the ophthalmic device 10. In addition, in the mutually orthogonal XYZ directions (three-axis directions) in the figure, the Y direction is the up-down direction, the Z direction is the front-back direction (also called the working distance direction) parallel to the front direction close to the subject (examined eye) and the rear direction away from the subject, and the X direction is the left-right direction perpendicular to both the up-down direction and the front-back direction.

[0028] The ophthalmologic device 10 is a multifunctional device capable of measuring intraocular pressure, ocular refractive power, corneal curvature, etc. of an eye under examination. The ophthalmologic device 10 includes a base 11 , a face support 12 , a drive mechanism 13 , a measurement head 14 (also referred to as a device body), and a monitor 15 .

[0029] A face support portion 12 and a driving mechanism 13 are provided on the base 11 .

[0030] The face support portion 12 includes a jaw support portion 12 a for supporting the jaw of the subject and a forehead stop portion 12 b for contacting the forehead of the subject, and supports the face of the subject.

[0031] The drive mechanism 13 is composed of an actuator (not shown) such as a motor. The drive mechanism 13 moves the measuring head 14 in the XYZ direction relative to the base 11. Thus, the measuring head 14 can be moved relative to the eye to be examined in the XYZ direction. As a result, by driving the drive mechanism 13, the measuring head 14 and the eye to be examined can be aligned in the XYZ direction.

[0032] Various ophthalmic measuring devices including a non-contact tonometer 14A and an auto-optometer 14B are provided in the measuring head 14. Since the structures of the non-contact tonometer 14A and the auto-optometer 14B are well-known techniques, their detailed description is omitted here.

[0033] The monitor 15 is a display device manufactured by the manufacturing method of the display device of the present invention, and is, for example, a touch panel monitor. The monitor 15 is held rotatably by a two-axis rotation holding mechanism 16 provided on the measuring head 14, and its position and posture can be adjusted manually. The display area 30a of the monitor 15 displays an observation image of the inspected eye acquired by the measuring head 14, the measurement results of the eye characteristics of the inspected eye (intraocular pressure value, eye refractive power, corneal curvature, etc.), a setting menu screen for performing various settings, and an operation menu screen for performing various operations.

[0034] [Structure of the rotation holding mechanism 16] Figure 2 It is a front perspective view of the monitor 15 and the rotation holding mechanism 16 . Figure 3 It is a rear perspective view of the monitor 15 and the rotation holding mechanism 16 .

[0035] like Figure 2 and Figure 3 As shown, the rotation holding mechanism 16 has two rotation axes C1 and C2 and holds the monitor 15 rotatably in a direction around the rotation axis C1 parallel to the Z direction and in a direction around an arbitrary rotation axis C2 perpendicular to the Z direction.

[0036] The rotation holding mechanism 16 generally includes a base 20, a vertical rotation shaft portion 22, and a horizontal rotation shaft portion 24. The base 20 is fixed to the measuring head 14. The vertical rotation shaft portion 22 is provided to be rotatable in the axial direction around the rotation axis C1 relative to the base 20. In addition, since the detailed structure of the base 20 and the vertical rotation shaft portion 22 is a known technology (refer to the above-mentioned patent document 1), the specific description is omitted here.

[0037] The horizontal rotation shaft portion 24 is provided to be rotatable in the axial direction around the rotation axis C2 relative to the vertical rotation shaft portion 22, and holds the monitor 15. Thus, the monitor 15 is held to be rotatable in the axial directions around the rotation axes C1 and C2 relative to the measuring head 14 (base 20) via the vertical rotation shaft portion 22 and the horizontal rotation shaft portion 24. The horizontal rotation shaft portion 24 is covered by a cover 37a formed integrally with a rear cover 37 of the monitor 15 described later.

[0038] Figure 4 It is a perspective view showing the structure inside the cover 37 a of the horizontal rotation shaft portion 24 . Figure 5 yes Figure 2 A cross-sectional view of the monitor 15 along line 5-5. Figure 4 and Figure 5 As shown, a horizontal plate 24a, a pair of rotation holding portions 24b, a pair of support arms 24c, and a mounting bracket 24d are provided inside the cover 37a of the horizontal rotation shaft portion 24.

[0039] The horizontal plate 24a is provided to be rotatable in the axial direction around the rotation axis C2 relative to the vertical rotation shaft portion 22. A pair of rotation holding portions 24b are provided on the horizontal plate 24a at intervals in the axial direction of the rotation axis C2. The pair of rotation holding portions 24b hold a pair of support arms 24c to be rotatable in the axial direction around the rotation axis C2.

[0040] The pair of support arms 24c are provided at intervals in the axial direction of the rotation axis C2. The base ends of the pair of support arms 24c are respectively held rotatably by the pair of rotation holding portions 24b. In addition, the front ends of the pair of support arms 24c are formed integrally with the mounting bracket 24d.

[0041] The mounting bracket 24d is a metal plate parallel to (including substantially parallel to, hereinafter the same as) the display surface of the monitor 15, and is provided so as to straddle the front end portions of the pair of support arms 24c. The mounting bracket 24d is fixed to a metal plate 32 constituting the monitor 15 described later by screws 26. Thus, the monitor 15 is fixed to the horizontal rotation shaft portion 24.

[0042] [Structure of Monitor 15 and Method of Manufacturing the Same] Figure 6 1 is a perspective view showing a state where the frame 36 is removed from the monitor 15. Figure 2 , Figure 5 and Figure 6 As shown, the monitor 15 is a liquid crystal monitor including a liquid crystal panel 30 corresponding to a planar display panel (flat panel display) of the present invention.

[0043] Although not shown in the figure, the liquid crystal panel 30 (also referred to as a liquid crystal module) is composed of, for example, a pair of parallel glass substrates having transparent electrodes, a liquid crystal sealed between the pair of glass substrates, a polarizing plate and a driving circuit provided on the glass substrates, and a backlight. The liquid crystal panel 30 is formed into a substantially rectangular shape when viewed from its display surface side. In addition, a rectangular display area 30a and a frame-shaped non-display area surrounding the display area 30a, namely, a panel end 30b (glass substrate) are formed on the display surface of the liquid crystal panel 30. Furthermore, a metal plate 32 described later is bonded and fixed to the back side of the liquid crystal panel 30, and the back side of the liquid crystal panel 30 is covered by the metal plate 32.

[0044] The monitor 15 includes a liquid crystal panel 30 , a metal plate 32 , a spacer 34 , and a frame 36 that accommodates them.

[0045] The frame 36 is composed of a rear cover 37 and a front cover 38. The rear cover 37 covers the back surface of the metal plate 32 described later, which is opposite to the surface facing the liquid crystal panel 30 (see Figure 3 ). In addition, the rear cover 37 is formed integrally with the cover 37a covering the horizontal rotation shaft portion 24 described above.

[0046] The front cover 38 is a frame-shaped frame that exposes the display area 30a on the display surface side of the liquid crystal panel 30 and covers the panel end 30b. In addition, the front cover 38 is formed with a pressing portion 38a that restricts the displacement of the liquid crystal panel 30 toward the front side of the display surface by contacting the panel end 30b.

[0047] Figure 7 It is a perspective view of the metal plate 32 before the liquid crystal panel 30 is bonded and fixed. Figure 8 3 is a perspective view of the metal plate 32 after the liquid crystal panel 30 is bonded and fixed. In the following description, the "left-right direction" refers to the left-right direction (screen width direction) of the liquid crystal panel 30 (monitor 15), and the "up-down direction" refers to the up-down direction (screen height direction) of the liquid crystal panel 30. In addition, the direction perpendicular to the display surface of the liquid crystal panel 30 and toward the front side of the display surface is simply referred to as the "display surface front side".

[0048] like Figure 7 and Figure 8 As shown, the metal plate 32 (also referred to as a metal structure) corresponds to the plate of the present invention. The metal plate 32 is formed into a substantially flat plate shape parallel to the liquid crystal panel 30 except for its upper, lower, left, and right ends, and is fixed by screws 26 (see Figure 5 ) is fixed on the mounting bracket 24d.

[0049] The two ends of the metal plate 32 in the left-right direction are bent vertically (including substantially vertically, the same below) toward the front side of the display surface. Thus, the metal plate 32 is formed with side wall portions 32a that rise from the two ends in the left-right direction toward the front side of the display surface. In addition, the two ends in the up-down direction of the metal plate 32 are also bent toward the front side of the display surface. Thus, the metal plate 32 is formed with side wall portions 32b that rise from the two ends in the up-down direction toward the front side of the display surface. In addition, in the present embodiment, the side wall portion 32a extends toward the front side of the display surface more than the side wall portion 32b.

[0050] The front end of the left side wall portion 32a is bent vertically to the left, and the front end of the right side wall portion 32a is bent vertically to the right. Thus, a rectangular bonding area 33 extending in the vertical direction and parallel to the display surface of the liquid crystal panel 30 is formed at the front ends of the left and right side walls 32a.

[0051] Adhesive tapes 40 are attached to the left and right adhesive regions 33, respectively. Thus, after the liquid crystal panel 30 is positioned relative to the metal plate 32 by a known method, the panel ends 30b of the liquid crystal panel 30 in the left and right directions are overlapped with the left and right adhesive regions 33 of the metal plate 32, so that the panel ends 30b in the left and right directions are respectively surface-bonded to the left and right adhesive regions 33 of the metal plate 32 by the adhesive tapes 40. That is, the liquid crystal panel 30 is fixed to the metal plate 32 by surface bonding. The surface bonding mentioned here means that the bonding area between the liquid crystal panel 30 and the metal plate 32 is set to a certain range or more (set to a large range). Thus, compared with the case where the panel end 30b of the liquid crystal panel 30 is screwed to the metal plate 32, the load applied to the panel end 30b is reduced. In addition, since it is not necessary to screw the liquid crystal panel 30 to the frame 36 as in the invention described in the above-mentioned patent document 1, even if the tester performs a rotation operation of the monitor 15, it is possible to prevent a large load from being directly applied to the liquid crystal panel 30 from the frame 36.

[0052] In addition, a bonding area 33 (adhesive tape 40) may be provided at the front end of the side wall portion 32b in the vertical direction of the metal plate 32, and the panel ends 30b in the vertical and horizontal directions of the liquid crystal panel 30 may be bonded to the bonding areas 33 of the vertical and horizontal metal plate 32 via the adhesive tape 40 surfaces.

[0053] After the liquid crystal panel 30 is bonded to the metal plate 32, if the display surface of the liquid crystal panel 30 is covered by the front cover 38, the upper, lower, left and right panel ends 30b of the liquid crystal panel 30 are pressed by the pressing parts 38a of the front cover 38 (see Figure 5 As a result, the liquid crystal panel 30 bonded to the metal plate 32 can be prevented from being displaced toward the front side of the display surface, for example, from being warped.

[0054] The spacer 34 is equivalent to the conductive member of the present invention, and has elasticity and conductivity. One or more spacers 34 are arranged between the liquid crystal panel 30 and the metal plate 32, for example, six spacers are arranged in this embodiment. Thus, since the liquid crystal panel 30 and the metal plate 32 can be electrically conductive via each spacer 34, EMC (Electromagnetic Compatibility) countermeasures can be achieved. In addition, the number and arrangement pattern of the spacers 34 are not particularly limited, but for EMC countermeasures, it is preferred to arrange the spacers 34 in a wide range.

[0055] As described above, in the present embodiment, the liquid crystal panel 30 is not fixed to the frame 36 by screws, but is fixed to the metal plate 32 mounted on the rotation holding mechanism 16 only by bonding, so that even when the liquid crystal panel 30 is miniaturized and thinned, it can be easily fixed. In addition, since the liquid crystal panel 30 is only fixed to the metal plate 32 and is not directly fixed to the frame 36, even if the tester performs a rotation operation of the monitor 15, it is possible to prevent a large load from being applied to the liquid crystal panel 30 from the frame 36. As a result, compared with the past, the fixing of the liquid crystal panel 30 can be performed more easily, and the load applied to the liquid crystal panel 30 can be reduced.

[0056] [Modification of the monitor 15 (metal plate 32)] Fig. 9 It is a cross-sectional view of the liquid crystal panel 30 and the metal plate 32 along the left-right direction (see reference symbol H). Fig.10 4 is a cross-sectional view of the liquid crystal panel 30 and the metal plate 32 along the vertical direction (refer to the reference numeral V). In the above embodiment, the displacement of the liquid crystal panel 30 relative to the metal plate 32 in the vertical direction (equivalent to the parallel direction of the present invention) is limited only by the adhesive force of the adhesive tape 40, but the displacement of the liquid crystal panel 30 in the vertical direction may also be limited by the metal plate 32.

[0057] Specifically, Fig. 9 As shown, a limiting member 42 is further provided in the left-right direction bonding area 33 of the metal plate 32 to sandwich the liquid crystal panel 30, and the displacement of the liquid crystal panel 30 relative to the metal plate 32 in the left-right direction is limited by the limiting member 42. Fig.10 As shown, a restriction member 43 for sandwiching the liquid crystal panel 30 in the vertical direction is further provided on the vertical side wall portion 32 b of the metal plate 32 , and the restriction member 43 restricts displacement of the liquid crystal panel 30 relative to the metal plate 32 in the vertical direction.

[0058] By providing the limiting members 42 and 43 on the metal plate 32 in this way, it is possible to reliably limit the displacement of the liquid crystal panel 30 in the up-down, left-right directions relative to the metal plate 32, that is, the displacement in the direction parallel to the display surface of the liquid crystal panel 30. In addition, when the liquid crystal panel 30 is bonded and fixed to the metal plate 32, the positioning of the liquid crystal panel 30 in the up-down, left-right directions relative to the metal plate 32 can be easily performed.

[0059] Furthermore, in the above-described modified example, the restriction member 42 and the restriction member 43 are provided on the metal plate 32 , but only one of the restriction member 42 and the restriction member 43 may be provided.

[0060] [other] In each of the above-described embodiments, the liquid crystal panel 30 is bonded to the metal plate 32 using the adhesive tape 40 , but, for example, an adhesive may be used instead of the adhesive tape 40 .

[0061] In the above-mentioned embodiments, the liquid crystal panel 30 is surface-bonded to the metal plate 32 , but it may be point-bonded at a plurality of locations. Alternatively, the entire back surface of the liquid crystal panel 30 may be surface-bonded to the metal plate 32 .

[0062] In the above-mentioned embodiments, the monitor 15 is described by taking the monitor 15 rotatably held by the rotation holding mechanism 16 of two axes as an example, but the present invention can also be applied to the manufacturing method of the monitor 15 rotatably held by the rotation holding mechanism 16 of one axis or more than three axes.

[0063] In the above embodiments, the panel end 30 b of the liquid crystal panel 30 is bonded to the metal plate 32 . However, any region such as the center (the back side of the display region 30 a ) of the liquid crystal panel 30 may be bonded to the metal plate 32 .

[0064] In the above-mentioned embodiments, the manufacturing method of the monitor 15 having the liquid crystal panel 30 is described as an example. However, the present invention is also applicable to the manufacturing method of the monitor 15 having various well-known display panels such as organic EL (Electro Luminescence).

[0065] In each of the above-described embodiments, the liquid crystal panel 30 is bonded to the metal plate 32 , but the liquid crystal panel 30 may be bonded to a plate formed of a material other than metal (preferably a conductive material).

[0066] In the above-mentioned embodiments, the manufacturing method of the monitor 15 of the ophthalmic device 10 (multi-function device) for measuring the intraocular pressure value, eye refractive power and corneal curvature of the examined eye is described as an example, but the present invention can also be applied to the manufacturing method of various monitors provided in various known ophthalmic devices.

[0067] Description of Reference Numerals 10: Ophthalmic devices, 11: Base, 12: Facial support part, 12a: jaw support, 12b: forehead guard, 13: Driving mechanism, 14: Measuring head, 14A: Non-contact tonometer, 14B: Automatic optometry, 15: Monitor, 16: Rotation holding mechanism, 20: Base, 22: Vertical rotation axis, 24: Horizontal rotation axis, 24a: horizontal plate, 24b: Rotation holding portion 24c: support arm, 24d: Install the pallet, 26: Screws, 30: LCD panel, 30a: Display area, 30b: Panel end, 32: Metal plate, 32a: side wall portion, 32b: side wall, 33: bonding area, 34: Pad, 36: frame, 37: rear cover, 37a: hood, 38: Front cover, 38a: Pressing part, 40: Adhesive tape, 42: Restriction components, 43: Restriction components, C1: Rotation axis, C2: Rotation axis.

Claims

1. A method for manufacturing a display device, wherein the display device is rotatably held by a rotation holding mechanism having more than one rotation axis in an ophthalmic device, wherein: The rotation holding mechanism is configured to rotatably hold a plate covering the back side of a planar display panel, and the display panel is bonded and fixed to the plate.

2. The method for manufacturing a display device according to claim 1, wherein: The plate is a metal plate, One or more conducting members are disposed between the metal plate and the display panel to provide electrical connection between the display panel and the metal plate.

3. The method for manufacturing a display device according to claim 1, wherein: The board and the display panel are housed in a frame having a rear cover covering the back side of the board opposite to the surface facing the display panel and a front cover exposing a display area of ​​the display surface of the display panel and covering an end of the display surface.

4. The method for manufacturing a display device according to claim 3, wherein: The front cover restricts displacement of the front side of the display surface of the display panel.

5. The method for manufacturing a display device according to claim 1, wherein: The display panel surface is bonded to the plate.

6. The method for manufacturing a display device according to claim 5, wherein: At least left and right end surfaces of the display panel are bonded to the plate.

7. The method for manufacturing a display device according to any one of claims 1 to 6, wherein: When a direction parallel to a display surface of the display panel is defined as a parallel direction, a restriction member that restricts displacement of the display panel relative to the plate in the parallel direction is provided on the plate.

8. The method for manufacturing a display device according to any one of claims 1 to 6, wherein: The rotation holding mechanism having the rotation axis of one axis or two axes holds the display device rotatably.

9. The method for manufacturing a display device according to any one of claims 1 to 6, wherein: The display panel is bonded to the plate by an adhesive tape.

Images