JP2015118184A - Projection type display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projection type display device having a display unit which, while securing the ease of viewing, hardly comes off and hardly slips out of place even when an external force is applied.SOLUTION: The projection type display device comprises an exterior body 17 having an opening 17d in a ridge part extending in a line with a curvature, and a display unit having a display member 103 which, while letting light from a light-emitting element 102a pass through, lets it be emitted from a display surface 103a, adjusted to the shape of the opening 17d, to the outside. The display member 103 includes a first tip surface 103 ahaving a step part 103a in which the display surface 103ais the top surface, the side surface of the step part 103a facing a first wall surface 17don one surface side, and a second tip surface 103afacing a second wall surface 17don the other surface side. When an external force is applied to the display surface 103afrom a direction perpendicular to one surface, the first wall surface 17dand the first tip surface 103 acome into contact, and when an external force is applied from a direction perpendicular to the other surface, the second wall surface 17dand the second tip surface 103acome into contact.

Description

  The present invention relates to a projection display device.

  2. Description of the Related Art Conventionally, there is a projection display device (projector) that enlarges and projects an image displayed on a display element using illumination light from a light source on an external screen. The projection display device includes a display unit (display window) that notifies the user of state information at that time. The display unit is generally incorporated in one direction on the upper surface (top surface) of the housing. Patent document 1 is disclosing the display apparatus which fixes to a display member by pinching | interposing the light guide member used as a display window with the nail | claw part of a fixing member. In this display device, the display member itself is fixed to the housing by inserting a boss of a fixing member into a small hole provided in the display window.

JP 2011-165608 A

  Here, the projection type display device is not only mounted on the table and used, but may be used, for example, attached to the ceiling. In this case, the ridgeline of the frame is rounded so that the display window is easy to see not only from one direction but also from the other direction (other angles), and the display window is installed according to the roundness. possible. However, when the display window is configured on this ridgeline, if the fixing method shown in Patent Document 1 is applied, for example, when an external force is applied, a force is applied obliquely to the nail portion. It is not desirable because it tends to come off from the housing or shift easily.

  The present invention has been made in view of such a situation. For example, the present invention provides a projection display device having a display unit that is easy to see and has a display unit that is difficult to be detached or hardly displaced even when an external force is applied. For the purpose.

  In order to solve the above-described problems, the present invention is a projection display device that projects an image on an external projection surface, and has an opening at a ridge line portion where one surface and another surface are connected with a curvature. And a display unit that is attached to the exterior case and notifies the state information when the image is projected to the outside from the opening, and the display unit emits light that represents the state information And a display member that transmits light to the outside from the display surface that matches the shape of the opening while transmitting light, and the display member has a step portion with the display surface as an upper surface, and the side surface of the step portion is The display member is attached to the exterior housing, and includes a first tip surface facing the first wall surface of the opening on the surface side and a second tip surface facing the second wall surface of the opening on the other surface side. If an external force is applied to the display surface from a direction perpendicular to the one surface, the first wall When the first tip surface and abuts when added to an external force from a direction perpendicular to the other plane, the second wall surface and the second distal surface abuts, characterized in that.

  According to the present invention, for example, it is possible to provide a projection display device having a display unit that is easy to see and has a display unit that is difficult to be displaced or hardly displaced even when an external force is applied.

It is a figure which shows the structure of the projection type display apparatus which concerns on one Embodiment of this invention. It is a figure for demonstrating the position of a light guide. It is a figure which shows the shape of a ride guide. It is a figure which shows a light guide and an LED board. It is a figure which shows the state with which the light guide and the LED board | substrate were combined. It is a figure which shows the part which attaches the ride guide of an outer case. It is a figure which shows the process in which a light guide is attached to an exterior upper case. It is a figure which shows the state in which the light guide was attached to the exterior upper case. It is a figure which shows the state in which the light guide was attached to the exterior upper case. It is a figure which shows the positional relationship of a light guide and its peripheral component.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  First, the configuration of a projection display device (hereinafter simply referred to as “display device”) according to an embodiment of the present invention will be described. Hereinafter, as a display device according to the present embodiment, an image displayed on the display element is enlarged and projected onto a screen (projected surface) installed outside using illumination light from a light source. FIG. 1 is a top view showing an internal configuration of the display device 100 according to the present embodiment. FIG. 2 is an exploded perspective view for explaining the position of the light guide 103 with respect to the outer case 17 and the inner container 6 in the display device 100. In the present embodiment, the display device 100 is fixed (installed) on the ceiling as an example.

  First, the display device 100 includes an illumination optical system α, a color separation / synthesis optical system β, and a projection lens optical system γ as optical system units. The illumination optical system α includes a lamp 1, which is a light source, a polarization conversion element 2, and other optical elements, and emits illumination light to the color separation / synthesis optical system β. The color separation / synthesis optical system β includes a liquid crystal panel (display element) for three colors of R, G, and B that receives light emitted from the illumination optical system α. The projection lens optical system γ receives the emitted light from the color separation / synthesis optical system β and projects an image on the screen.

  The display device 100 also includes an inner container 6, an outer upper case 17 as an outer casing, and an outer lower case (not shown) that encloses the inner container 6 and is combined with the outer upper case 17. The inner container 6 accommodates the illumination optical system α and the color separation / synthesis optical system β, and fixes the projection lens optical system γ. Further, the inner container 6 has an electromagnetic wave shielding sheet metal 101 for suppressing electromagnetic waves generated from the power supply substrate on the side surface. When the display device 100 is fixed to the ceiling, the exterior lower case faces the ceiling, while the upper surface (top surface) of the exterior upper case 17 faces toward the indoor side, that is, the user side. The outer upper case 17 has a side surface that is continuous with the upper surface. And the ridgeline part (meaning of a connection area | region) of this upper surface and a side surface has a round shape (shape with a certain curvature) as shown in FIG. Further, in the display device 100, the light guide 103 is installed in a plurality of openings 17 d formed in the ridge line portion of the outer case 17. The light guide (display member) 103 is a substantially transparent member that transmits and diffuses light generated from the LED 102a that is a light emitting element electrically connected to the drive control unit 19 and uniformly emits the light to the outside. For example, when the display device 100 does not operate normally, the drive control unit 19 detects the abnormality, and then transmits an error signal to the LED substrate 102 to cause the LED 102a to emit light (turn on or blink), and notify the user to that effect. The status information shown is broadcast. Alternatively, the LED 102a of a specific color may be caused to emit light even when the display device 100 is operating normally. Details of the shape of the light guide 103 will be described later.

  Further, the display device 100 includes the following components in addition to the inner container 6. The power source 7 has an AC inlet (not shown) and supplies power to a ballast 8 and each drive system described later. The ballast 8 is a power supply device for lighting the lamp 1. The optical cooling fan 9 sucks outside air from the first air inlet 17a in the outer case 17 and cools the optical elements of the color separation / synthesis optical system β by the exhaust air. The intake duct 11 holds the optical cooling fan 9 and guides outside air that has entered from the first intake port 17 a to the intake port of the optical cooling fan 9. The exhaust fan 13 cools the power supply 7 and the ballast 8 by supplying air, cools the lamp 1 and its peripheral part by exhausting the heat, and exhausts heat from the exhaust port 17 c in the outer case 17. The exhaust fan holder 14 holds the exhaust fan 13. The lamp cooling fan 15 takes in air used for cooling the optical elements of the color separation / synthesis optical system β and cools the lamp 1 by exhausting the air. The lamp cooling duct 16 guides the air exhausted from the lamp cooling fan 15. The air filter 18 is installed in the vicinity of the first air inlet 17a, and suppresses intrusion of dust into the housing. The drive control unit (drive control board) 19 is equipped with a connector (interface) that captures various signals such as images and controls. For example, a drive command for a liquid crystal panel in the color separation / synthesis optical system β, a lighting command for the lamp 1, etc. Alternatively, a drive command to each of the fans 9, 13, 15 is transmitted and controlled. Further, the drive control unit 19 is fixed to the outer upper case 17 via a sheet metal member (not shown). The polarization conversion element cooling fan 20 sucks air from the second air inlet 17b in the outer case 17 and cools the polarization conversion element 2 by exhausting the air. The polarization conversion element cooling duct 21 guides the air exhausted by the polarization conversion element cooling fan 20.

Next, each shape of the light guide 103 and a part of the outer case 17 to which the light guide 103 is attached will be described. Figure 3 is a perspective view showing the shape of the light guide 103 as viewed from there is 103a ₁ (actually the user's face into the field of view when mounted on the outer upper case 17) side display surface of the stepped portion 103a. The light guide 103 has a plurality of step portions 103a each containing display surface 103a _1. Each display surface 103a ₁ has a long and narrow shape along the ridge line portion from the upper surface to the side surface of the outer case 17. Each stage unit 103a, when viewed from the side where the display surface 103a _1, has a stepped shape that the display surface 103a ₁ and the upper surface. In particular, the first tip surface 103 a _{2 on the} side surface of each step 103 a serves as a reference surface when the light guide 103 is attached to the outer case 17. The attachment procedure will be described later. Further, the number of stepped portions 103a in the present embodiment is four as an example, but it may be singular or plural. Then, the user confirms the display status of the stepped portion 103a (the color difference or the status of lighting, blinking, etc.), so that the status information when projecting an image such as normal operation or occurrence of abnormality of the display device 100 Can be recognized.

FIG. 4 shows the LED substrate 102 and the light guide 103 as a display unit as viewed from the side opposite to the side where the stepped portion 103a is present (the side facing the inner container 6 when attached to the outer case 17). It is a disassembled perspective view. On the other hand, FIG. 5 is a perspective view showing a state in which the LED substrate 102 and the light guide 103 are combined. The LED board 102 includes a plurality of LEDs 102a corresponding to the installation positions of the respective stepped parts 103a, a connector 102b electrically connected to a main control board (not shown) by an FPC (flexible printed circuit board), and a plurality (this embodiment). 2) openings 102c. On the other hand, when the light guide 103 is viewed from the side opposite to the side on which the display surface 103a ₁ is present, when the LED substrates 102 are combined, light emitted from the corresponding LEDs 102a is transmitted toward the display surface 103a ( Or a shape suitable for diffusion). Moreover, the light guide 103 has the following engaging parts and multiple types of projection parts. For example, the engaging portions 103 b are formed at both ends of the light guide 103 in the direction in which the step portions 103 a are arranged, and are inserted into the openings 102 c of the LED substrate 102 to be engaged. The LED substrate 102 is fixed to the light guide 103 by the engagement portion 103b engaging with the opening portion 102c. For example, the first restricting portion 103 c extends on the opposite side of the step 103 a at both ends to the side where the step 103 a is, and when the light guide 103 is attached to the outer upper case 17, the outer upper case 17. It is elastically deformable on the inner surface while being in surface contact with the inner surface. Due to the presence of the first restricting portion 103c, after the light guide 103 is attached to the outer case 17, the displacement movement (position shift) on the inner surface or the movement toward the outside (protruding outward). Can be avoided. In the light guide 103, the second restricting portion 103d is provided on the rib that can be elastically deformed without contacting the inner surface of the outer case 17 when the light guide 103 is attached to the outer case 17. Provided between the parts 103c. The direction in which the second restricting portion 103d is directed is perpendicular to the direction in which the first restricting portion 103c is directed, specifically, the direction from the inner surface side of the outer upper case 17 toward the inner side. Due to the presence of the second restricting portion 103d, the movement toward the inside (retraction inward) can be avoided after the light guide 103 is attached to the exterior upper case 17.

FIG. 6 is a perspective view showing a portion to which the light guide 103 is attached in the outer case 17. The exterior upper case 17 has a plurality of openings 17d, first ribs 17e, and second ribs 17f. Each opening 17d, when fitted with a light guide 103, each of the display surface 103a ₁ of the step portions 103a, is exposed to the outside in accordance with the shape of the display surface 103a _1. Here, the light guide 103 in combination with and luminescence of each LED102a is it recognizable user only the display surface 103a ₁ of the stepped portion 103a that corresponds to the stepped portion 103a side adjacent, as far as possible It is desirable not to leak. Therefore, first ribs 17e as wall portions that suppress leakage of light emission to the adjacent stepped portions 103a are formed in the gap regions between the openings 17d adjacent to each other. In the present embodiment, since the number of openings 17d is four, in this case, three first ribs 17e are provided. The second rib 17f acts as a wall portion that suppresses the light emission of each LED 102a from leaking from the attachment portion, and also acts as a wall portion against which the first restriction portion 103c abuts when the light guide 103 is attached.

Next, the process of attaching the light guide 103 to the outer case 17 and the state after the attachment will be described. FIG. 7 is a cross-sectional view showing, in time series, the process of attaching the light guide 103 to the outer case 17 in a state where the LED substrate 102 is combined with the light guide 103. FIG. 8 is a perspective view showing a state in which the light guide 103 is attached to the outer upper case 17 as viewed from the outside of the outer upper case 17. FIG. 9 is a perspective view showing a state in which the light guide 103 is attached to the upper outer case 17 as viewed from the inside of the outer upper case 17. First, the operator carrying out the mounting, as shown in FIG. 7 (a), one wall surface (first wall surface 17d of each opening portion 17d of the first tip surface 103a ₂ outer upper case 17 of the step portions 103a ₁ ) Contact. Then, the operator, by rotating the light guide 103 as a reference axis contact points being in contact with the respective first tip surface 103a ₂ and the first wall face 17d _1, shown in FIG. 7 (b) In this way, the entire step portion 103a is inserted into the opening portion 17d. Further, when the operator attaches the light guide 103 to the exterior upper case 17, the second rib 17 f formed on the exterior upper case 17 is pushed by pressing the first restricting portion 103 c toward the inner surface of the exterior upper case 17. It engages with the front-end | tip of elastically deforming.

  FIG. 10 is a cross-sectional view showing the positional relationship between the light guide 103 and its peripheral components in a state where the light guide 103 is attached to the outer case 17 and other assembly is completed. In assembling the display device 100, the operator places the light guide 103 on the outer case 17 according to the procedure shown in FIG. 8, and then places the inner container 6 (more specifically, for example, the electromagnetic wave in the inner container 6. The shield metal plate 101) is fixed to the upper case 17 with screws. In the present embodiment, at this time, the second restricting portion 103 d is formed on the light guide 103 so that the second restricting portion 103 d of the light guide 103 contacts one side surface of the electromagnetic wave shielding sheet metal 101. By this attachment, the rib portion having the second restricting portion 103d is elastically deformed, and as a result, the entire light guide 103 is always pressed by the electromagnetic wave shielding sheet metal 101 (inner container 6).

Thus, in the display device 100, the shape of the display surface 103 a ₁ of the light guide 103 is rounded together with the ridge line portion of the outer case 17. Therefore, even if the display device 100 is installed at a high place such as a ceiling, the user may not only view from one direction (for example, a direction perpendicular to the upper surface of the display device 100) but also from another direction (other angle). ) Has an advantage that the display surface 103a ₁ is easy to see.

Further, the first front end surface 103a _{2 on} each step 103a and the second front end surface 103a ₃ opposite to the first front end surface 103a ₂ are respectively in the state where the light guide 103 is attached to the outer upper case 17, respectively. It faces the wall surface of each opening 17d (see FIG. 7B). That is, when an external force is applied from the outside of the outer upper case 17 on the display surface 103a ₁ in this state, the stepped portion 103a abuts to one of the wall surface of the opening 17d. Specifically, the display surface 103a _1, for example, when an external force is applied from the upper surface direction of the outer upper case 17, the first tip surface 103a ₂ in the step portions 103a, first wall surface 17d of the opening 17d ₁ abuts. In contrast, the display surface 103a _1, for example, when an external force is applied from the side of the outer upper case 17, the second distal surface 103a ₃ in the step portions 103a, the second wall surface 17d of the opening 17d ₂ abuts. Further, the light guide 103 is pressed by the electromagnetic wave shielding sheet metal 101 through the second restricting portion 103d as described above. Therefore, even if an external force is applied to the display surface 103 a ₁ from the outside of the outer upper case 17, the light guide 103 is not easily detached from the outer upper case 17 and is not easily displaced. On the other hand, for example, even when an external force more than necessary is applied to the light guide 103 from the inside of the upper outer case 17 during attachment, the light guide 103 is attached on the outer surface due to the presence of the first restricting portion 103c. Difficult to shift from case 17.

  Further, since the light guide 103 and the outer upper case 17 to which the light guide 103 is attached have the shape as described above, a fastening member such as a screw is not required to attach the light guide 103. Therefore, when viewed from the entire display device 100, the number of components can be reduced, and the mounting operation can be facilitated.

  As described above, according to the present embodiment, it is possible to provide a projection display device having a display unit that is easy to see and has a display unit that is difficult to be displaced or hardly displaced even when an external force is applied.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

17 Exterior upper case 17d Opening 17d ₁ 1st wall 17d ₂ 2nd wall 102a LED
DESCRIPTION OF SYMBOLS 103 Display member 103a Step part 103a ₁ Display surface 103a ₂ 1st front end surface 103a ₃ 2nd front end surface 100 Projection type display apparatus

Claims (6)

A projection display device that projects an image on an external projection surface,
An exterior housing having an opening in a ridge line where one surface and the other surface are connected with curvature;
A display unit attached to the exterior housing and informing the outside of the state information when projecting the video, from the opening,
The display unit includes a light emitting element that emits light representing the state information, and a display member that transmits the light to the outside from a display surface that matches the shape of the opening,
The display member has a stepped portion with the display surface as an upper surface,
The side surface of the stepped portion includes a first tip surface facing the first wall surface of the opening on the one surface side, and a second tip surface facing the second wall surface of the opening on the other surface side. Including
When an external force is applied to the display surface from a direction perpendicular to the one surface while the display member is attached to the exterior housing, the first wall surface and the first tip end The second wall surface and the second tip surface abut when a surface abuts and an external force is applied from a direction perpendicular to the other surface,
A projection type display device characterized by that.   The first tip surface and the second tip surface contact the first tip surface with the first wall surface when the display member is attached to the exterior housing, and the display member with the contact point as a reference axis. The projection display device according to claim 1, wherein the stepped portion is formed in a shape that fits the opening while rotating. The display member is extended on a side opposite to the display surface of the stepped portion, and is elastic to the inner surface while being in surface contact with the inner surface of the outer casing while being attached to the outer casing. A deformable first restricting portion;
The exterior casing has a wall portion against which the first restricting portion abuts in a state where the display member is attached.
The projection display device according to claim 1, wherein: An internal container fixed inside the exterior housing,
The display member extends on a side opposite to the display surface of the stepped portion, and is elastically deformable while contacting one side surface of the inner container while being attached to the exterior casing. Have two regulating sections,
The projection display device according to claim 1, wherein the projection type display device is a projection type display device.   The projection display apparatus according to claim 4, wherein a direction in which the second restricting portion is directed is perpendicular to a direction in which the first restricting portion is directed. The display unit includes a substrate that holds the light emitting element,
The substrate is held by the display member;
The projection display device according to claim 1, wherein the projection display device is a projection type display device.

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