JP2013048394A - Head mount display and optical unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a head mount display which enables a display panel to be held at a position with high accuracy, realizes a cooling structure and a dirt sealing structure of the display panel, and is small and lightweight.SOLUTION: An optical unit includes a lens block 401 housing an ocular optical system formed by combining multiple lenses; a panel holder 402 having multiple fastening pins; a panel assembly 403 having fastening holes into which the fastening pins are inserted; a cover frame 404 covering a side surface part of the display panel 224 with the panel holder 402; and a heat sink 405 made of a material having high heat conductivity.

Description

  The technology disclosed in this specification relates to a head-mounted display and an optical unit that are used by being mounted on a user's head and provides a virtual image. In particular, the position of the display panel is adjusted according to the optical characteristics of the lens. The present invention relates to a fixed head mounted display and an optical unit.

  2. Description of the Related Art A display device that is worn on a head and views an image, that is, a head mounted display (HMD) is widely known. The head-mounted display has an optical unit for each of the left and right eyes, and is configured to be used in combination with headphones to control vision and hearing. When configured to completely block the outside world when worn on the head, the virtual reality at the time of viewing increases. The head-mounted display can also display different images for the left and right eyes, and can display a 3D image by displaying an image with parallax for the left and right eyes.

  A high-resolution display panel made of, for example, an organic EL (Electro-Luminescence) element can be used for the left and right eye display units of the head-mounted display. In addition, if an appropriate angle of view is set with an optical system and multiple channels are reproduced with headphones, it will be possible to reproduce the realistic sensation as viewed in a movie theater.

  In a head-mounted display, if the optical axes of the optical system do not coincide with each other with high accuracy, the observing user feels uncomfortable. In order to match the left and right optical axes, it is common to adjust the positions of the left and right display units so that the observed image matches the adjustment index. For example, after the liquid crystal display element is mounted on the holding member after adjusting the position corresponding to the X, Y, and ω axes, the holding member to which the liquid crystal display element is fixed is attached to the optical unit that houses the eyepiece optical system. Thus, a head-mounted image display device that does not require or reduces the adjustment of the optical axis of the liquid crystal display element has been proposed (see, for example, Patent Document 1).

  In order to satisfy the required accuracy as a head-mounted display, the present applicant considers that the position of the display panel needs to be fixed in accordance with the optical characteristics of the lens. The positioning accuracy of the display panel with respect to the lens must be at least a pixel size (for example, 12 microns when an organic EL element is used).

  However, it is difficult to satisfy the required accuracy in mechanical positioning such as butting and fitting of holes. In addition, in order to realize a structure that satisfies the above-mentioned required accuracy by mechanical positioning, it is necessary to increase the accuracy of the component and to manage it according to the accuracy, resulting in an increase in component cost and assembly cost.

  Further, when foreign matter such as dust adheres to the surface of the display panel, it is magnified by the lens and observed by the user, so that the image quality is lowered and the merchantability is impaired. For this reason, a dustproof structure for sealing the light emitting surface of the display panel is required.

  Further, a thin display element such as the above-described organic EL element or liquid crystal display is used for the display unit of the head-mounted display. A display panel manufactured by this type of semiconductor process is known to generate heat according to power consumption. On the other hand, since the maximum drive temperature of the display panel is determined, the display panel incorporated in the head-mounted display must be managed within the maximum drive temperature.

  In short, the head-mounted display has different purposes for the right and left optical units, namely, maintaining the high positional accuracy of the display panel, cooling the display panel, and dust sealing structure of the light emitting surface of the display panel 3 The function of the element must be provided. However, as functions are implemented for different purposes, the size and weight of the head-mounted display body will both increase. Since a head-mounted display that is used by being mounted on the user's head must be small and light, it is difficult to equip all three functions.

JP 2008-249869 A, paragraph 0030

  An object of the technology disclosed in the present specification is to provide an excellent head-mounted display and an optical unit in which the position of the display panel is fixed in accordance with the optical characteristics of the lens.

  Another object of the technology disclosed in the present specification is to provide an excellent head-mounted display and an optical unit in which a dust-proof structure for preventing adhesion of foreign matters such as dust is taken on the surface of the display panel. is there.

  Another object of the technology disclosed in the present specification is to provide an excellent head-mounted display and an optical unit capable of suitably managing a display panel within a maximum driving temperature.

  In addition, the purpose of the technology disclosed in this specification is to provide functions of three elements having different purposes such as maintaining high position accuracy of the display panel, cooling structure of the display panel, and dust sealing structure without impairing the reduction in size and weight. It is an object to provide an excellent head mounted display and an optical unit.

The present application has been made in consideration of the above problems, and the technology according to claim 1
A display panel for displaying an image, and an optical unit including a lens block for optically processing an image displayed on the display panel.
A video signal processing unit for processing video signals for the left eye and right eye;
A display control unit that controls display drive of the left-eye and right-eye display panels based on the video signal processed by the video signal processing unit;
Comprising
Each of the left and right optical units holds the display panel so that the position of the optical unit can be adjusted with respect to the optical axis of the lens block, and fixes the display panel after the position adjustment, and display panel cooling for cooling the display panel And a display panel sealing portion that seals the light emitting surface of the display panel,
It is a head-mounted display.

  According to the technology described in claim 2 of the present application, in the optical unit of the head-mounted display according to claim 1, the display panel holding unit can be adjusted in six axes with respect to the optical axis of the lens block. The display panel is configured to be held.

  According to the third aspect of the present application, the optical unit of the head mounted display according to the second aspect includes a plurality of fixing pins in which the display panel holding unit is fixed to the lens barrel of the lens block. A panel assembly in which the display panel is fixed in advance to a panel outer frame having a fixing hole drilled at a position corresponding to the fixing pin, and the fixing pin is attached to each fixing hole of the panel outer frame. In the inserted state, the position of the display panel with respect to the optical axis of the lens block can be adjusted with six axes.

  According to the technology described in claim 4 of the present application, the optical unit of the head mounted display according to claim 3 has positioned the display panel with a predetermined accuracy with respect to the optical axis of the lens block. The display panel was positioned with respect to the lens block by pouring UV resin into each fixing hole of the panel outer frame to fill the gap between the fixing pin and irradiating with UV light to cure the UV resin. Configured fixed in position.

  According to the technology described in claim 5 of the present application, in the optical unit of the head mounted display according to claim 1, the display panel cooling unit has a heat sink that is in surface contact with the substrate side of the display panel. doing.

  According to the technology described in claim 6 of the present application, the optical unit of the head mounted display according to claim 5 fills a gap generated when the heat sink is brought into surface contact with the substrate side of the display panel. A thermal conductive grease.

  According to the technique described in claim 7 of the present application, the optical unit of the head mounted display according to claim 1 is configured such that the display panel sealing portion is fixed to the side surface of the display panel by the display panel holding portion. A cover frame that covers the portion and a lid that closes the opening of the cover frame are provided.

  According to the technique described in claim 8 of the present application, in the optical unit of the head-mounted display according to claim 7, the lid is a heat sink that is in surface contact with the substrate side of the display panel.

  According to the ninth aspect of the present invention, the optical unit of the head mounted display according to the eighth aspect fills a gap generated when the heat sink is brought into surface contact with the substrate side of the display panel. A thermal conductive grease.

Further, the technique according to claim 10 of the present application is
A display panel for displaying images,
A lens block for optically processing an image displayed on the display panel;
A display panel holding unit that holds the display panel so that the position of the lens block can be adjusted with respect to the optical axis of the lens block and fixes the display panel after the position adjustment;
A display panel cooling section for cooling the display panel;
A display panel sealing portion for sealing the light emitting surface of the display panel;
An optical unit for a head-mounted display.

  According to the technology described in claim 11 of the present application, the display panel holding unit of the optical unit according to claim 10 holds the display panel so that six axes can be adjusted with respect to the optical axis of the lens block. It is configured.

  According to the technique described in claim 12 of the present application, the display panel holding portion of the optical unit according to claim 11 corresponds to the plurality of fixing pins fixed to the lens barrel of the lens block and the fixing pins. A panel assembly in which the display panel is fixed in advance to a panel outer frame having a fixing hole drilled at a position, and the fixing pin is inserted into each fixing hole of the panel outer frame, The position of the display panel with respect to the optical axis of the lens block can be adjusted with six axes.

  According to the technique of claim 13 of the present application, the optical unit of claim 12 positions the display panel with a predetermined accuracy with respect to the optical axis of the lens block, and then A structure in which the display panel is fixed at a position positioned with respect to the lens block by pouring UV resin into each fixing hole to fill a gap between the fixing pins and irradiating with UV light to cure the UV resin. Is done.

  According to the technique described in claim 14 of the present application, the display panel cooling section of the optical unit described in claim 10 has a heat sink that is in surface contact with the substrate side of the display panel.

  According to the technique described in claim 15 of the present application, the optical unit described in claim 14 includes a thermally conductive grease that fills a gap generated when a heat sink is brought into surface contact with the substrate side of the display panel. In addition.

  According to the technique described in claim 16 of the present application, the display panel sealing portion of the optical unit according to claim 10 includes a cover frame that covers a side surface portion of the display panel fixed by the display panel holding portion. And a cover portion for closing the opening portion of the cover frame.

  According to the technique described in claim 17 of the present application, the lid portion of the optical unit described in claim 16 is a heat sink that is in surface contact with the substrate side of the display panel.

  According to the technique described in claim 18 of the present application, the optical unit described in claim 17 includes a thermally conductive grease that fills a gap generated when the heat sink is brought into surface contact with the substrate side of the display panel. In addition.

  According to the technology disclosed in the present specification, it is possible to provide an excellent head mounted display and optical unit in which the position of the display panel is fixed in accordance with the optical characteristics of the lens.

  Further, according to the technique disclosed in this specification, it is possible to provide an excellent head mounted display and optical unit in which the position of the display panel is fixed with accuracy below the pixel size.

  In addition, according to the technology disclosed in this specification, the head-mounted display has a sealing structure in which the optical unit and the cooling mechanism are integrated, thereby preventing foreign matters such as dust from adhering to the surface of the display panel. It can prevent suitably.

  Further, according to the technology disclosed in the present specification, the cooling structure integrated with the optical unit is configured to exhaust heat from the substrate surface of the display panel. Can be managed.

  In addition, according to the technology disclosed in this specification, the optical unit and the cooling mechanism are integrated to form a sealing structure, thereby maintaining the high positional accuracy of the display panel, the cooling structure of the display panel, and the dust sealing structure. It is possible to provide an excellent head-mounted display and an optical unit that are small and light and have the functions of three elements having different purposes.

  Other objects, features, and advantages of the technology disclosed in the present specification will become apparent from a more detailed description based on the embodiments to be described later and the accompanying drawings.

FIG. 1 is a diagram schematically showing the configuration of an image display system including a head-mounted display. FIG. 2 is a diagram schematically showing the internal configuration of the head-mounted display 10. FIG. 3 is an assembly diagram of an optical unit in which a cooling mechanism is integrated. FIG. 4 is an exploded view of the optical unit shown in FIG. FIG. 5A is a diagram illustrating a state where the panel assembly 403 is viewed from the light emitting surface (display surface) side of the display panel 224. FIG. 5B is a diagram showing a state where the panel assembly 403 is viewed from the substrate side of the display panel 224. FIG. 6 is a diagram for explaining the operation of attaching the panel assembly 403 by inserting each fixing pin of the lens barrel of the lens block 401 into the corresponding fixing hole, and pouring UV resin into the fixing hole and fixing the panel assembly 403. FIG. FIG. 7 is a view showing a state in which the panel assembly 403 is fixed to the lens block 401. FIG. 8A is a diagram showing how the cover frame 404 is attached to the lens block 401. FIG. 8B is a view showing a state where the cover frame 404 is attached to the lens block 401. FIG. 9A shows how the heat sink 405 is attached to the lens block 401. FIG. 9B shows the optical unit with the heat sink 405 attached to the lens block 401 and the assembly completed.

  Hereinafter, embodiments of the technology disclosed in this specification will be described in detail with reference to the drawings.

  FIG. 1 schematically shows the configuration of an image display system including a head-mounted display. The illustrated system includes a head mounted display 10 main body, a Blu-ray disc playback device 20 that is a source of viewing content, and a high-definition display that is another output destination of the playback content of the Blu-ray disc playback device 20 (for example, HDMI-compatible television) 30 and a front-end box 40 for processing AV signals output from the Blu-ray disc playback apparatus 20.

  The front end box 40 corresponds to an HDMI repeater that performs, for example, signal processing and HDMI output when an AV signal output from the Blu-ray disc playback apparatus 20 is input via HDMI. The front end box 40 is also a two-output switcher that switches the output destination of the Blu-ray disc playback device 20 to either the head-mounted display 10 or the high-definition display 30. In the illustrated example, the front end box 40 has two outputs, but may have three or more outputs. However, the front end box 40 makes the output destination of the AV signal exclusive, and gives the highest priority to the output to the head mounted display 10.

  In addition, HDMI (High-Definition Multimedia Interface) is based on DVI (Digital Visual Interface) and mainly uses audio for digital video transmission using TMDS (Transition Minimized Differential Signaling) as a physical layer. Interface standard. This system complies with, for example, HDMI 1.4.

  The Blu-ray disc playback apparatus 20 and the front end box 40 and the front end box 40 and the high-definition display 30 are respectively connected by HDMI cables. The front end box 40 and the head mounted display 10 can also be configured to be connected with an HDMI cable, but the AV signal may be serially transferred using a cable with other specifications. Good. However, it is assumed that the AV signal and power are supplied by a single cable connecting the front end box 40 and the head mounted display 10, and the head mounted display 10 also obtains driving power via this cable. be able to.

  The head mounted display 10 includes independent display units for the left eye and the right eye. Each display unit uses, for example, an organic EL element. Each of the left and right display units is equipped with a wide viewing angle optical system with low distortion and high resolution.

  FIG. 2 schematically shows the internal configuration of the head-mounted display 10. The illustrated head mounted display includes a UI (User Interface) operation unit 201, a video signal input unit 202, a central control unit 210, and a display control unit 220.

  The video signal input unit 202 inputs a video signal reproduced and output from the Blu-ray disc playback apparatus 20 via the front end box 40.

  In the central control unit 210, the left and right video signal generation unit 211 generates a left and right video signal obtained by mixing the left eye video signal and the right eye video signal from the input video signal, and writes the left and right video signals in the video buffer 212.

  The UI operation unit 201 accepts user operations via buttons and the like. In the central control unit 210, an OSD (On Screen Display) control unit 213 reads image data for the corresponding menu from the bitmap buffer 214 in response to a UI operation, and generates an OSD screen. The OSD display position control unit 215 controls the display position of the OSD screen, and the OSD drawing unit 216 writes the image data of the OSD screen at a corresponding position in the OSD buffer 217.

  Then, the image composition unit 218 superimposes the OSD screen written in the OSD buffer 217 on the image data written in the video buffer 212 and outputs it to the display control unit 220.

  In the display control unit 220, first, the left and right video signals input by the left and right video signal separation unit 221 are separated into a left-eye video signal and a right-eye video signal. Then, the left-eye display drive control unit 222 controls the drawing of the left-eye video signal on the left-eye display panel 224. The right-eye display drive control unit 223 controls the drawing of the right-eye video signal on the right-eye display panel 225. Each of the left-eye display panel 224 and the right-eye display panel 225 is equipped with a lens block (not shown in FIG. 2) for enlarging an image. The left and right lens blocks each comprise a combination of a plurality of optical lenses, and optically process the images displayed on the display panels 224 and 225. The display panels 224 and 225 are attached to the lens block with a predetermined positional accuracy to form left and right optical units. The images displayed on the light emitting surfaces of the display panels 224 and 225 are enlarged when passing through the lens block, and form a large virtual image on the retina of the user. Then, the left-eye image and the right-eye image are fused in the observing user's brain.

  The head-mounted display 10 is desirably provided with the functions of three elements having different purposes, such as maintaining the high positional accuracy of the display panel, the cooling structure of the display panel, and the dust sealing structure of the light emitting surface of the display panel. ing. However, when the functions are implemented according to the purpose, both the size and the weight increase, and there is a problem that the size and weight are impaired (as described above).

  On the other hand, according to the technology disclosed in this specification, the optical unit and the cooling mechanism are integrated to form a sealing structure, thereby maintaining high position accuracy of the display panel without impairing the size and weight. It is possible to realize the head-mounted display 10 having both the functions of three elements having different purposes such as the cooling structure of the display panel and the dust sealing structure of the light emitting surface of the display panel.

  FIG. 3 shows an assembly diagram of the optical unit in which the cooling mechanism is integrated. FIG. 4 is an exploded view illustrating components constituting the optical unit shown in FIG. 3 separated from each other substantially along the optical axis direction. Each figure shows an optical unit for the left eye. Note that the optical unit for the right eye is a structure that is substantially symmetric with respect to the optical unit for the right eye.

  As shown in FIG. 4, the optical unit includes a lens block 401 containing an eyepiece optical system composed of a combination of a plurality of lenses, a panel holder 402, and a display panel 224 fixed in advance by a panel outer frame 403A. The assembly 403, the cover frame 404 that covers the side surface portion of the display panel 224 together with the panel holder 402, and the heat sink 405 made of a material having high thermal conductivity.

  The lens block 401 has a proximity lens 401 </ b> A close to the display panel 224. In addition, a plurality of fixing pins (four in the illustrated example formed at four corners) are fixed to the lens barrel of the lens block 401. Since the configuration of the eyepiece optical system housed in the lens block 401 is a design matter, detailed description thereof is omitted in this specification. However, it should be noted that the optical characteristics of the lens block 401 vary within tolerances (ie, individual differences) with respect to the design value.

  A method of attaching the panel holder 402 to the lens block 401 is arbitrary. In the example shown in FIG. 4, the panel holder 402 is screwed to the lens block 401.

  The panel assembly 403 is obtained by bonding and fixing a display panel 224 to a panel outer frame 403A in advance. The panel outer frame 403A has a fixing hole through which each fixing pin (described above) fixed to the lens barrel of the lens block 401 is inserted. The display panel 224 includes a display element such as an organic EL and a substrate (FPC: Flexible Printed Circuits) on which the display element is mounted. Here, it should be noted that the pixel position of the display panel 224 has a variation within a tolerance with respect to the panel outer frame 403A. FIG. 5A shows a state where the panel assembly 403 is viewed from the light emitting surface (display surface) side of the display panel 224. FIG. 5B shows a state where the panel assembly 403 is viewed from the substrate side of the display panel 224.

  The panel assembly 403 is attached by inserting each fixing pin of the panel holder 402 into the corresponding fixing hole. In this state, the display panel 224 is positioned with respect to the optical axis of the lens block 401 with an accuracy of, for example, a pixel size or less. With the fixing pins of the panel holder 402 (lens barrel of the lens block 401) inserted through the corresponding fixing holes on the outer frame side of the panel 403A, the position of the display panel 224 is set to 6 via the panel holder 402. It is possible to change in the axial direction. Therefore, by changing the position of the display panel 224 in the six-axis direction, it is possible to cope with individual variations within the tolerance of the optical characteristics of the lens block 401 and individual variations in the pixel position of the display panel 224 with respect to the panel outer frame 403A. Thus, the display panel 224 can be positioned with high accuracy.

  FIG. 6 illustrates a state in which each fixing pin of the panel holder 402 is inserted through the corresponding fixing hole. When fixing the panel assembly 403, as shown in the figure, UV resin is poured into each fixing hole to fill the gap with the fixing pin.

  FIG. 7 shows a state where the panel assembly 403 is fixed to the lens block 401. As shown in the drawing, a space is provided between the panel outer frame 403 that holds the display panel 224 and the proximity lens 401A. As will be described later, the position of the display panel 224 can be changed in six axial directions for positioning. it can.

  When the position of the display panel 224 is determined, the UV resin is poured into the fixing holes to fill the gaps with the fixing pins as described above, and the UV resin is cured by irradiating with ultraviolet rays, thereby displaying on the lens block 401. The panel 224 can be fixed in a desired position.

  When the cover frame 404 is attached, the side portion of the display panel 224 together with the panel holder 402 is covered thereby. Further, a heat sink 405 is attached to the opening of the cover frame 404. A cushion material 404A is attached to the FPC removal portion of the cover frame 404 in order to reduce the external load received by the FPC from the heat sink 405 or the like. Thus, the FPC is suppressed through the cushion material 404A.

  The cover frame 404 is brought into close contact with the flange surface of the lens block 401, and the light sink surface (display surface) of the display panel 224 is sealed by bringing the heat sink 405 into surface contact with the surface of the display panel 224 on the substrate side. Is done.

  FIG. 8A shows how the cover frame 404 is attached to the lens block 401. FIG. 8B shows a state where the cover frame 404 is attached to the lens block 401. A method of attaching the cover frame 404 is arbitrary. In the illustrated example, the cover frame 404 is screwed to the lens block 401. In the figure, the portion that is in close contact with the flange surface of the lens block 401 on the cover frame 404 side and the portion that is in close contact with the cover frame 404 on the flange surface side of the lens block 401 are indicated by hatching.

  Further, since the attached heat sink 405 is in surface contact with the substrate side of the display panel 224, the display panel 224 can be effectively cooled. When the gap between the heat sink 405 and the display panel 224 is filled with thermally conductive grease, the cooling effect is further improved.

  FIG. 9A shows how the heat sink 405 is attached to the lens block 401. FIG. 9B shows the optical unit in a state where the heat sink 405 is attached to the lens block 401 (that is, the assembly is completed). The method of attaching the heat sink 405 is arbitrary. In the illustrated example, the heat sink 405 is screwed to the lens block 401 via the cover frame 404. In the figure, the portion that is in close contact with the heat sink 405 on the cover frame 404 side is indicated by hatching.

  It can be understood from FIGS. 8 and 9 that the light emitting surface of the display panel 224 is sealed by the cover frame 404 and the heat sink 405. Further, since the heat sink 405 has an effect of cooling the display panel 224 from the substrate side as described above, it can be said that the heat sink 405 is a sealing structure integrated with a cooling mechanism. It should be noted that neither the cover frame nor the heat sink 405 directly hits the display panel 224.

  As described above, the optical unit shown in FIG. 3 realizes the functions of three elements having different purposes such as maintaining the high positional accuracy of the display panel, the cooling structure of the display panel, and the dust sealing structure of the light emitting surface of the display panel. be able to. In addition, the function for each purpose is not realized individually, but the function for each purpose is realized at the same time by the sealing structure in which the cooling mechanism using the heat sink 405 is integrated. 10 does not hinder the reduction in size and weight. The following summarizes the points for realizing each objective function.

Maintaining High Position Accuracy of Display Panel (1) The display panel 224 is bonded and fixed to the panel outer frame 403 in advance and handled as a panel assembly 403.
(2) A space is provided between the panel outer frame 403 that holds the display panel 224 and the proximity lens 401A (see FIG. 7).
(3) The display panel 224 is positioned in a state where each fixing pin of the panel holder 402 is inserted into a corresponding fixing hole on the panel outer frame 403A side and temporarily fixed. Specifically, the camera recognizes a light emission pattern that can recognize the spatial position and orientation of the display panel 224, and adjusts the position of the display panel 224 by six axes.
(4) The state where the position adjustment of the display panel 224 is completed is maintained, and the gap between the fixing hole of the panel outer frame 403A and the fixing pin fixed to the lens barrel of the lens block 401 is filled with UV resin.
(5) While maintaining the position of the panel outer frame 403, the UV resin is irradiated with ultraviolet rays, and the cured UV resin is used to fix the panel outer frame 403 and the fixing pins (in other words, the display panel 224 and the lens block 401). Fix the spatial position.
(6) The material of the fixing pin is not particularly limited as long as the position of the panel outer frame 403 can be held within the required accuracy. For example, a resin material may be used.
(7) The fixing pin may be inserted after filling the fixing hole of the panel outer frame 403 with UV resin.
(8) The cross-sectional shape of the fixing pin may be round or square.
(9) The fixing hole of the panel outer frame 403 and the fixing pin inserted therethrough have a space margin that allows a positional error consisting of individual component dimensional accuracy and assembly accuracy.

Dust sealing structure of the light emitting surface of the display panel (1) The sealing structure for dust-proofing the light emitting surface of the display panel 224 is mainly composed of a lens block barrel, a cover frame 404, and a heat sink 405. Is done.
(2) The lens barrel of the lens block 401 and the cover frame 404 are in close contact with each other on the surfaces facing each other.
(3) The cover frame 404 and the heat sink 405 are in close contact with each other on opposite surfaces.
(4) The FPC take-out portion of the display panel 224 has a structure in which a cushion material 404A is attached to the FPC to reduce the external load, and the FPC is suppressed through the cushion material 404A.
(5) The assembling work shown in FIGS. 8 and 9 is performed in a clean booth, and prevents dust from entering and attaching to the light emitting surface of the display panel 224 during assembling.
(6) After assembly is completed, the structure is dustproof.

Display panel cooling structure (1) The display panel 224 can be discharged from the substrate-side surface (back surface of the light-emitting surface) by a heat sink 405.
(2) The height of the cover frame 404 in the optical axis direction is such that when the heat sink 405 is attached, a space is created between the back surface of the display panel 224 and the heat sink 405.
(3) Fill the gap between the back surface of the opposing display panel 224 and the heat sink 405 with thermal conductive grease.
(4) When assembling, an appropriate amount of thermally conductive grease is applied in advance to the back surface of the display panel 224 or the heat sink 405.
(5) When the heat sink 405 is attached, the thermally conductive grease is spread and filled in a certain area between the back surface of the display panel 224 and the heat sink 405.
(6) Use thermally conductive grease that has appropriate viscosity and thixotropy so that it does not sag or flow from the gap.
(7) The dimensional variation of the position of the display panel 224 relative to the heat sink 405 due to the six-axis adjustment fixing of the display panel 224 can be absorbed by this structure.

Note that the technology disclosed in the present specification can also be configured as follows.
(1) A display panel for displaying an image, an optical unit including a lens block for optically processing an image displayed on the display panel, and a left-eye and right-eye, which are provided for the left eye and the right eye, respectively. A video signal processing unit for processing a video signal for eyes;
A display control unit configured to control display drive of the display panel for the left eye and the right eye based on the video signal processed by the video signal processing unit; A display panel holding unit that holds the display panel so that the position of the display panel can be adjusted with respect to the optical axis of the block and fixes the display panel after the position adjustment, a display panel cooling unit that cools the display panel, and a light emitting surface of the display panel A head mounted display having a display panel sealing portion for sealing.
(2) The head mounted display according to (1), wherein the display panel holding unit holds the display panel so that six axes can be adjusted with respect to an optical axis of the lens block.
(3) The display panel holding part is configured to mount the display panel on a panel outer frame having a plurality of fixing pins fixed to the lens block lens barrel and fixing holes formed at positions corresponding to the fixing pins. It has a panel assembly fixed in advance, and in a state where the fixing pin is inserted into each fixing hole of the panel outer frame, the position of the display panel with respect to the optical axis of the lens block can be adjusted by six axes. The head mounted display according to (2) above.
(4) After positioning the display panel with a predetermined accuracy with respect to the optical axis of the lens block, UV resin is poured into each fixing hole of the outer frame of the panel to fill a gap with the fixing pin, and irradiation with ultraviolet rays is performed. Then, the display panel is fixed at a position positioned with respect to the lens block by curing the UV resin, and the head mounted display according to (3) above.
(5) The head mounted display according to any one of (1) and (3), wherein the display panel cooling unit includes a heat sink that is in surface contact with the substrate side of the display panel.
(6) The head mounted display according to (5), further including a heat conductive grease that fills a gap generated when the heat sink is brought into surface contact with the substrate side of the display panel.
(7) The display panel sealing portion includes a cover frame that covers a side surface portion of the display panel fixed by the display panel holding portion, and a lid portion that closes an opening portion of the cover frame. ) Or the head mounted display according to any one of (3).
(8) The head mounted display according to (7), wherein the lid is a heat sink that is in surface contact with the substrate side of the display panel.
(9) The head mounted display according to (8), further including a heat conductive grease that fills a gap generated when the heat sink is brought into surface contact with the substrate side of the display panel.
(10) A display panel for displaying an image, a lens block for optically processing an image displayed on the display panel, and holding and adjusting the position of the display panel so that the position can be adjusted with respect to the optical axis of the lens block. An optical display for a head-mounted display, comprising: a display panel holding section that is fixed after the display panel; a display panel cooling section that cools the display panel; and a display panel sealing section that seals a light emitting surface of the display panel. unit.
(11) The optical unit according to (10), wherein the display panel holding unit holds the display panel so that six axes can be adjusted with respect to an optical axis of the lens block.
(12) The display panel holding portion may be configured such that the display panel is mounted on a panel outer frame having a plurality of fixing pins fixed to a lens barrel of the lens block and fixing holes formed at positions corresponding to the fixing pins. It has a panel assembly fixed in advance, and in a state where the fixing pin is inserted into each fixing hole of the panel outer frame, the position of the display panel with respect to the optical axis of the lens block can be adjusted by six axes. The optical unit according to (11) above.
(13) After the display panel is positioned with a predetermined accuracy with respect to the optical axis of the lens block, UV resin is poured into each fixing hole of the panel outer frame to fill a gap with the fixing pin, and irradiation with ultraviolet rays is performed. Then, the optical unit according to (12), wherein the UV resin is cured to fix the display panel at a position positioned with respect to the lens block.
(14) The optical unit according to any one of (10) and (12), wherein the display panel cooling unit includes a heat sink in surface contact with the substrate side of the display panel.
(15) The optical unit according to (14), further including a heat conductive grease that fills a gap generated when the heat sink is brought into surface contact with the substrate side of the display panel.
(16) The display panel sealing portion includes a cover frame that covers a side surface portion of the display panel fixed by the display panel holding portion, and a lid portion that closes an opening portion of the cover frame. ) Or the optical unit according to any one of (12).
(17) The optical unit according to (16), wherein the lid is a heat sink that is in surface contact with the substrate side of the display panel.
(18) The optical unit according to (17), further including a heat conductive grease that fills a gap generated when the heat sink is brought into surface contact with the substrate side of the display panel.

  As described above, the technology disclosed in this specification has been described in detail with reference to specific embodiments. However, it is obvious that those skilled in the art can make modifications and substitutions of the embodiments without departing from the scope of the technology disclosed in this specification.

  In the present specification, the embodiment in which the technology disclosed in this specification is applied to a head-mounted display has been mainly described. However, the gist of the technology disclosed in this specification is the configuration of a specific head-mounted display. It is not limited to. The technology disclosed in this specification can be similarly applied to various types of display devices in which a display panel and an optical system are integrated.

  In short, the present technology has been disclosed in the form of exemplification, and the description content of the present specification should not be interpreted in a limited manner. In order to determine the gist of the present technology, the claims should be taken into consideration.

DESCRIPTION OF SYMBOLS 10 ... Head mounted display 20 ... Blu-ray Disc playback apparatus 30 ... Hi-vision display 40 ... Front end box 201 ... UI operation part, 202 ... Video signal input part 210 ... Central control part, 211 ... Left and right video signal generation 212: Video buffer, 213 ... OSD control unit 214 ... Bitmap buffer, 215 ... OSD display position control unit 216 ... OSD drawing unit, 217 ... OSD buffer 218 ... Image composition unit 220 ... Display control unit, 221 ... Left / Right Video signal separation unit 222... Display driving control unit for left eye, 223. Display driving control unit for right eye 224... Display panel for left eye, 225... Display panel for right eye 401. ... Panel assembly, 404 ... Cover frame 4 5 ... heat sink

Claims (18)

A display panel for displaying an image, and an optical unit including a lens block for optically processing an image displayed on the display panel.
A video signal processing unit for processing video signals for the left eye and right eye;
A display control unit that controls display drive of the left-eye and right-eye display panels based on the video signal processed by the video signal processing unit;
Comprising
Each of the left and right optical units holds the display panel so that the position of the optical unit can be adjusted with respect to the optical axis of the lens block, and fixes the display panel after the position adjustment, and display panel cooling for cooling the display panel And a display panel sealing portion that seals the light emitting surface of the display panel,
Head mounted display. The display panel holding unit holds the display panel so that six axes can be adjusted with respect to the optical axis of the lens block.
The head-mounted display according to claim 1. The display panel holding portion previously fixed the display panel to a panel outer frame having a plurality of fixing pins fixed to a lens barrel of the lens block and fixing holes formed at positions corresponding to the fixing pins. A panel assembly is provided, and the position of the display panel with respect to the optical axis of the lens block can be adjusted in six axes in a state where the fixing pin is inserted into each fixing hole of the panel outer frame.
The head mounted display according to claim 2. After positioning the display panel with a predetermined accuracy with respect to the optical axis of the lens block, a UV resin is poured into each fixing hole of the outer frame of the panel to fill a gap with the fixing pin, and irradiation with ultraviolet rays is performed. By fixing the UV resin, the display panel is fixed at a position positioned with respect to the lens block.
The head mounted display according to claim 3. The display panel cooling unit has a heat sink in surface contact with the substrate side of the display panel.
The head-mounted display according to claim 1. A heat conductive grease filling a gap generated when the heat sink is brought into surface contact with the substrate side of the display panel;
The head mounted display according to claim 5. The display panel sealing portion includes a cover frame that covers a side surface portion of the display panel fixed by the display panel holding portion, and a lid portion that closes an opening portion of the cover frame.
The head-mounted display according to claim 1. The lid is a heat sink that is in surface contact with the substrate side of the display panel.
The head mounted display according to claim 7. A heat conductive grease filling a gap generated when the heat sink is brought into surface contact with the substrate side of the display panel;
The head mounted display according to claim 8. A display panel for displaying images,
A lens block for optically processing an image displayed on the display panel;
A display panel holding unit that holds the display panel so that the position of the lens block can be adjusted with respect to the optical axis of the lens block and fixes the display panel after the position adjustment;
A display panel cooling section for cooling the display panel;
A display panel sealing portion for sealing the light emitting surface of the display panel;
An optical unit for a head-mounted display. The display panel holding unit holds the display panel so that six axes can be adjusted with respect to the optical axis of the lens block.
The optical unit according to claim 10. The display panel holding portion previously fixed the display panel to a panel outer frame having a plurality of fixing pins fixed to a lens barrel of the lens block and fixing holes formed at positions corresponding to the fixing pins. A panel assembly is provided, and the position of the display panel with respect to the optical axis of the lens block can be adjusted in six axes in a state where the fixing pin is inserted into each fixing hole of the panel outer frame.
The optical unit according to claim 11. After positioning the display panel with a predetermined accuracy with respect to the optical axis of the lens block, a UV resin is poured into each fixing hole of the outer frame of the panel to fill a gap with the fixing pin, and irradiation with ultraviolet rays is performed. By fixing the UV resin, the display panel is fixed at a position positioned with respect to the lens block.
The optical unit according to claim 12. The display panel cooling unit has a heat sink in surface contact with the substrate side of the display panel.
The optical unit according to claim 10. A heat conductive grease filling a gap generated when the heat sink is brought into surface contact with the substrate side of the display panel;
The optical unit according to claim 14. The display panel sealing portion includes a cover frame that covers a side surface portion of the display panel fixed by the display panel holding portion, and a lid portion that closes an opening portion of the cover frame.
The optical unit according to claim 10. The lid is a heat sink that is in surface contact with the substrate side of the display panel.
The optical unit according to claim 16. A heat conductive grease filling a gap generated when the heat sink is brought into surface contact with the substrate side of the display panel;
The optical unit according to claim 17.