JP2007184773A - Electronic device and video display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical guiding unit which efficiently guides an optical signal of infrared light to a light receiving element integrally in a panel made of a light transmissive member. <P>SOLUTION: A light reception unit 100 formed integrally with the flat plate type light transmissive member is constituted such that when light is made incident from an incidence portion 16 on a front surface 10-1 of the panel, the light is reflected first to above the light reception unit 100 by an inclined plane 100-4 formed on the side of a back surface 10-2 of the panel. Then the light is repeatedly reflected by the front surface 100-1 and back surface 100-2 of the light reception unit 100 and a portion of the light reception unit 100 which is projected to the side of the back surface 10-2 of the panel and has an interface with air to reach a projection surface 100-3 as a top surface. Then light projected from the projection surface 100-3 is made incident on the light receiving element 200 opposed to the projection surface 100-3, so that the optical signal generated by a predetermined operation of a user is converted into an electric signal. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electronic device such as a flat panel display or a flat panel color television receiver using a liquid crystal panel or a plasma display panel (PDP), which is operated based on an optical signal.

  In recent years, many electronic devices such as television receivers, video tape recorders, and hard disk recorders have been put on the market with so-called remote control functions for operating these electronic devices from a distance. Yes. In an electronic device that can use the remote control function, it is necessary to provide the electronic device with a light receiving window that receives an optical signal such as infrared rays. The light receiving window is usually provided on the front surface of the electronic device and is disposed at a position that can be seen by the user, and thus affects the design of the appearance of the electronic device. For this reason, the light receiving window is usually made inconspicuous by reducing the size of the light receiving window or coloring the light receiving window in the same color as other parts so as not to impair the appearance design of the electronic device. .

As an electronic device that is operated based on a conventionally known optical signal, there is one disclosed in Patent Document 1.
The electronic device described in Patent Document 1 is an electronic device that is operated based on a received optical signal, and is a translucent member that constitutes a part of an exterior member of the main body of the electronic device and has translucency. And a light receiving unit that is covered by the exterior member and receives an optical signal and converts it into an electrical signal, and a light guide unit that guides the optical signal incident on the translucent member to the light receiving unit.
And the translucent member which comprises a part of exterior member is used as an optical signal taking-in port, and the external appearance design property is maintained.
Japanese Patent Laying-Open No. 2005-73132 (second page, FIG. 3)

In a video display device such as a flat panel display using a PDP or a liquid crystal panel, a flat panel color television receiver, etc., a front assembly having a large area and a flat transparent member is provided on the front surface. Print characters and symbols such as company name and trademark on the member, project light from one side of the translucent member into the translucent member by a plurality of light sources, illuminate the characters and symbols with this light, Proposals have been made to make these appear to shine in the air.
However, the front assembly whose front surface is a light-transmitting member as described above has a disadvantage that the optical signal intake port by the electronic device described in Patent Document 1 cannot be adopted.
That is, in this electronic device, since the reflection surface by the metal vapor deposition film such as aluminum is seen as a single streak in order to reflect the optical signal and guide it to the light receiving portion, it cannot be adopted from the viewpoint of design. Further, in this electronic device, most of the frame body serving as the front panel among the exterior members is configured by a non-translucent member, and an optical signal capturing port by the translucent member is provided in a part of the frame body. When the remote control device is operated from the front side corresponding to the light receiving unit on the right side of the liquid crystal panel, it is possible to cause the electronic device to perform a desired operation, but when the remote control device is moved from this position, an optical signal sufficient to operate is received. However, it is difficult to use in practice.

  In view of this point, the present invention proposes an electronic device having a take-in portion and a light guide portion that are suitable for receiving an optical signal and made of only a translucent member, and a video display device to which the electronic device is applied.

  In order to solve the above problems, the present invention provides an electronic device operated based on a received optical signal, a translucent member having translucency constituting an exterior member of the electronic device body, and receiving an optical signal. A light receiving element that converts the light signal into an electrical signal, and a light guide capturing part provided in the light transmitting member, and a light guiding part that guides the light signal incident on the capturing part to the light receiving element. It is a thing.

  In order to solve the above problems, the present invention provides an image display device that has an exterior member made of a translucent member around a display unit and that is operated based on the received optical signal. A light receiving element that converts the light signal into an electrical signal, and includes a light signal take-in portion provided in the translucent member, and a light guide portion that guides the light signal incident on the take-in portion to the light receiving element .

  According to the electronic device and the image display device of the present invention configured as described above, when an optical signal is projected to the capturing portion formed integrally with the translucent member itself, the light incident on the capturing portion is Since the light is guided to the light guide and reflected by the inner surface of the light guide to reach the light receiving element, an operation signal by light can be transmitted to the light receiving element.

  According to the electronic device and the video display device of the present invention, it is possible to perform a user-desired operation using an optical signal without impairing the design of the front assembly having a light-transmitting member on the front surface.

An example of a video display apparatus according to an embodiment of the present invention will be described with reference to FIGS.
FIG. 3 shows a perspective view seen from the front side of the video display apparatus according to the present example, and FIG. 4 shows a perspective view seen from the rear side of the video display apparatus. This example is applied to a liquid crystal display panel.

In FIG. 3, reference numeral 1 denotes a front assembly arranged on the front surface, 2 denotes an image display screen of a liquid crystal panel, and in FIG. 4, 3 denotes a rear cover, between the front assembly 1 and the rear cover 3. A liquid crystal panel main body, a driving circuit thereof, a tuner unit, a speaker and the like (not shown) are incorporated.
In this example, the video display screen of this video display device is 46 inches, for example, and this depth is made thin.

  The front assembly 1 is configured as shown in FIGS. 1 and 2. FIG. 1 is a perspective view of the front assembly 1, and FIG. 2 is an exploded perspective view of the front assembly 1 as viewed from the front side.

  1, 2, 10, 11, and 12 indicate an outer frame, an inner frame, and a cover frame, which are substantially left-right symmetrical rectangular frames each having an opening that is substantially the same size as the video display screen. The assembly 1 includes the outer frame 10, the inner frame 11, the cover frame 12, and the sash 20. Here, the sash 20 is provided in a frame shape on the four outer edges of the outer frame 10, and includes sash sides 20 a, 20 a, 20 b, and 20 b.

As shown in FIG. 2, the outer frame 10 is formed into a substantially rectangular transparent frame shape by injection molding or the like using a material having high transparency such as acrylic resin (methyl methacrylate resin) or polycarbonate resin. And the screw insertion hole for fixing integrally with the inner frame 11 mentioned later, and the screw insertion hole when assembling the rear cover 3 are formed.
Further, as shown in FIG. 3, a symbol such as a company name or a trademark (“ABCD” in the example of FIG. 3) 14 is printed on the lower frame portion of the rectangular transparent frame of the outer frame 10 and an infrared ray is displayed on the right side. An optical signal capturing unit 16 and an indicator 15 for receiving an optical signal of the remote control device are provided.
Here, the indicator 15 displays the power ON / OFF state, the presence / absence of timer setting, and the like based on the presence / absence of a light spot.

The inner frame 11 is formed by injection molding with a material having good moldability such as PS resin or ABS resin, and openings 11L and 11R exposing the speakers are integrally formed on the left and right sides of the frame shown in FIG. For example, you may make it paint after that. Further, a screw hole for fixing to the outer frame 10 and an engagement hole for detachably mounting a cover frame 12 described later are provided.
The cover frame 12 is formed by injection molding with a material having good formability and good shape stability such as PS resin or ABS resin, and is formed to have substantially the same frame size as the inner frame 11, and the inner side of the back frame shown in FIG. An engagement claw (not shown) for detachably attaching to the frame 11 is provided.
The sash 20 is composed of two long sash sides 20a and 20a and two short sash sides 20b and 20b, each having a substantially U-shaped cross section made of metal such as aluminum. The glossy surface is easy to reflect.

  In the front assembly 1 configured as described above, the inner frame 11 is fixed to the outer frame 10 with screws, and the engaging claws of the cover frame 12 are inserted into the engaging holes of the inner frame 11, so that the cover frame 12 Is detachably attached to the inner frame 11. The sash sides 20a, 20a, 20b, and 20b are fixed to the four peripheral edges of the outer frame 10 that is a rectangular frame. By attaching the cover frame 12 to the inner frame 11, the entire front surface side of the inner frame 11 including the speaker mounting portions 11L and 11R is covered so as to give a clean appearance.

  In the liquid crystal panel display device of this example, a rectangular frame-shaped cover frame 12 is arranged around the video display screen of the liquid crystal panel 2, and the transparent frame portion of the outer frame 10 is exposed on the outer periphery thereof. A sash 20 is provided. For this reason, since the liquid crystal panel 2 looks as if it is floating and the cover frame 12 can be detachably mounted, the user can easily replace the cover frame 12 of various colors and patterns, for example. You can change it to your liking and enjoy it.

Next, a light receiving mechanism unit for infrared light emitted from the remote control device to the liquid crystal panel display device will be described.
The light receiving mechanism section is composed of a light receiving section including an optical signal capturing section 16 shown in FIG. 3 and a light guide section provided integrally with the capturing section 16, and a light receiving element using an infrared sensor. And a light-receiving part is integrally formed in the flat light transmission member of the outer frame 10 which makes | forms a rectangular frame shape (refer FIG.1 and FIG.2).

First, the external shape of the light-receiving part which consists of the taking-in part 16 and the light guide part is demonstrated with reference to FIG.5 and FIG.6.
5 and 6 show a light receiving portion forming portion 10a in which the light receiving portion 100 is formed, and a perspective view showing the region where the light receiving portion forming portion 10a of the outer frame 10 made of a translucent member is cut away. It is. 5A is a perspective view seen from the front, FIG. 5B is a perspective view seen from the back, FIG. 6 is a top view, FIG. 6B is a front view, and FIG. 6C is a front view. It is a right view by arrow view R2-R2 to show.
In the following description, as shown in FIGS. 5A and 5B, the length direction in the light receiving portion forming portion 10a of the outer frame 10 is defined as the x direction, the height direction is defined as the y direction, and the thickness direction is defined as the z direction.

As shown in FIGS. 5A and 5B, the light receiving unit 100 is integrally formed with the light receiving unit forming part 10 a of the lower frame of the outer frame 10 that is a rectangular frame, using the same transparent resin material as the outer frame 10. Thus, the optical signal capturing portion 16 is a convex portion having slopes 16-1 and 16-2 on the front surface 10-1, and the rectangular cross section having a width W and a depth D with respect to the capturing portion 16. The square column part is integrally formed.
The substantially quadrangular prism portion has a light emitting surface 100-3 on its upper surface protruding from the upper surface 10-3 of the light receiving portion forming portion 10a by a height H1, and a neck portion 100-5 serving as a neck. The width of the projecting portion is formed so as to widen from the upper surface 10-3 so that the width at the exit surface 100-3 becomes W1 (W1> W).
Further, a substantially quadratic prism portion, a front surface 100-1 is only set back dimension _{T 1} to the front 10-1 of the light receiving portion forming portion 10a, rear 100-2 to the rear 10-2 of the light receiving portion forming portion 10a It is projecting by a dimension _{T 2} against. At the time of formation, as shown in FIG. 5B, an inclined surface 100-4 is formed below the substantially quadrangular prism portion.

In the light receiving mechanism portion formed in this way, infrared rays from the remote control device are irradiated toward the receiving portion 16 of the light receiving portion forming portion 10a shown in FIG. 5A serving as the light receiving portion of the optical signal. The light that has entered the translucent member from 16 is guided to the upper exit surface 100-3 shown in FIGS. 5A and 5B by the substantially square column portion, and the light that has jumped out from the exit surface 100-3 is emitted from the exit surface 100−. An optical signal is converted into a predetermined electrical signal by entering a light receiving element 200 (described later) disposed opposite to 3, and an operation desired by the user can be performed on the video display device by this electrical signal.
As described above, when an operation is instructed by irradiating the optical signal capturing unit 16 of the video display device with infrared rays, it is desirable to capture the optical signal so that there is no malfunction in the widest possible irradiation range.

  The light irradiation direction in the light receiving mechanism part of this example and the optical path in the light receiving part 100 will be described.

First, the X _O Y _O Z _O coordinate system is determined as follows in the light receiving mechanism of this example.
That is, the center of received light as a reference is a point O in the translucent member shown in FIG. 6C (hereinafter referred to as the center O), the axis parallel to the z direction and passing through the center O is Z ₀ , and the y direction an axis passing through the center O in parallel to the Y ₀ (see FIG. 6C). Also, an axis passing through the center O in parallel to the x-direction and X ₀ (see FIG. 6B).
The center of the range φ around the center 0 of about axis _{Z 0} on _X 0 _{Z 0} plane shown in FIG. 6A, the center 0 of about axis _{Z 0} on _Y 0 _{Z 0} plane shown in FIG. 6C For the irradiation of the optical signal in the range ψ, a sufficient amount of light that does not cause the light receiving element to malfunction can be emitted from the emission surface 100-3.
Here, φ and ψ are, for example, φ = −45 ° to 45 ° and ψ = −30 ° to 15 °, and no malfunction occurs in this range.
The angle ω1 shown in FIG. 6B is formed so as to be a spread angle from the center O to one end portion of the neck portion 100-5 on the X ₀ Y ₀ plane. In other words, if the distance from the center O to the exit surface 100-3 is H2, the width of the neck portion (substantially square column portion width) W and the width W1 of the exit surface 100-3 are approximately W = (H2- H1) × tan (ω1), W1 = H2 × tan (ω1).

FIG. 7 is an enlarged cross-sectional view showing an enlarged cross section of the light receiving unit 100 as viewed in the direction of arrows R1-R1 shown in FIG. 6B. In the cross section indicated by the oblique lines in FIG. 7, the light that is incident on the substantially columnar portion of the translucent member that is above the formation area of the inclined surface 100-4 provided below the back surface 100-2 of the substantially rectangular column portion. Acts as a so-called light guide section that guides the light to the upper exit surface 100-3. Hereinafter, a substantially columnar portion of the light receiving portion forming portion 10a made of a light transmissive member is referred to as a “light guide block”.
This light guide block will be described with reference to FIGS.
FIG. 8 is an explanatory diagram showing the sectional view shown in FIG. 7 divided into four regions A to D for simplicity. That is, the cross section of the light receiving unit 100 is divided into a rectangular region A, a right isosceles triangular region B, a right triangular region C, and a polygonal region D. Among these, the light guide block is formed by three regions A to C.

In FIGS. 9A and B, reference numeral 150 denotes a light guide block, FIG. 9A is an integrated perspective view, and FIG. 9B is an exploded perspective view showing the structure of the block.
As shown in FIG. 9B, the light guide block 150 has a rectangular cross section 150a having a rectangular cross section with a width W and a depth D, and a height H, and two side lengths D and D1 (D1 = D). ) And a triangular prism 150b having a height of W, and a triangular prism 150c having a cross section forming a right triangle of two sides L1 and L2 sandwiching the right angle and having a height of W. , Two triangular prisms 150d and 150d having a cross section forming a right triangle with a length of two sides sandwiching a right angle of H1 and (W1-W) / 2 and a height of D.
Then, as shown in FIG. 9B, these are integrated at a predetermined position in the quadrangular column 150a to form the light guide block 150 shown in FIG. 9A.

Hereinafter, the light receiving unit 100 of this example having the light guide block 150 will be described with reference to FIGS. 8 and 9 while showing more specific dimension examples.
In the following, the cross section shown in FIG. 8 will be described as a cross sectional view of the light receiving portion forming portion 10a. That is, the area A shown in FIG. 8 is described as a cross section of the quadrangular prism 150a shown in FIG. 9B, the area B is a triangular prism 150b, and the area C is a cross section of the triangular prism 150c. Accordingly, the areas A to C forming the light guide block 150 have a thickness W in the front-rear direction of the paper surface shown in FIG. Here, the width W is assumed to be W = 8 mm, and in the range of the height H1 shown in FIG.

The rectangular column 150a corresponding to the region A shown in FIG. 8 has a vertical H of H = 31 mm, a horizontal D of D = 10 mm, and a width W of W = 8 mm. In addition, the triangular prism 150b corresponding to the region B has a right isosceles triangle with two sides lengths D and D1 of D = D1 = 10 mm and a height W of W = 8 mm. Further, the triangular prism 150c corresponding to the region C has a length of two sides L1 and L2 sandwiching a right angle of L1 = 16.5 mm, a right triangle of L2 = 6 mm and a height W of W = 8 mm. The diagonal θ of the side of the length L2 is θ = approximately 20 °, and the hypotenuse L3 is L3 = approximately 17.6 mm.
8 is arranged at the lower side of the rectangle of the region A shown in FIG. 8, and the right triangle of the right angled isosceles triangle of the region B is arranged. With the hypotenuse that is the opposite side of the corner set to the right side of the figure, a vertical apex angle is disposed on the extension line of the lower side of the rectangle of region A.
That is, as shown in FIG. 9B, first, a side surface 150-2 having a side length D and a height W of the triangular prism 150b is disposed on the bottom surface forming the width W and the depth D of the square column 150a. The side surface 150-3 that forms the height D1 is flush with the side surface 150-3. Then, a slope 150-4 having a side length L3 and a height W of the triangular prism 150c is provided integrally with the front surface 150-1 of the rectangular prism 150a.
Then, triangular prisms 150d and 150d are provided to form a light guide block 150 shown in FIG. 9A.

The light guide block 150 shown in FIG. 9A is formed integrally with a flat plate-like translucent member forming a part of the outer frame 10 before and after the paper surface shown in FIG. For example, the translucent member has a height W of W = 51 mm and a thickness t1 of t1 = 7 mm (see FIG. 5A). At this time, the front surface 150-1 (front surface 100-1 after integration) shown in FIG. 9A of the light guide block 150 is set by the length T1 from the front surface 10-1 of the translucent member as shown in FIG. 5A. Back. Here, T1 is, for example, T1 = 3 mm.
By integration with the outer frame 10, a cross-sectional area D shown in FIG. 8 is formed, and the light receiving unit 100 is formed.

In the light receiving unit 100 in which the translucent member of the outer frame 10 is formed with respect to the light guide block 150 as described above, a part of the triangular prism 150c illustrated in FIG. 9B is protruded from the translucent member, and illustrated in FIG. 5A. An intake portion 16 having two inclined surfaces 16-1 and 16-2 is formed. Then, as shown in FIG. 6C, the lower slope 16-2 is used as an optical signal incident region.
The light that has entered the capture unit 16 of the light receiving unit 100 becomes invalid light that does not return to the light guide block 150 as it is when guided to the outer frame 10 side before and after the paper surface shown in FIG. The incident light needs to use the interface with the air of the light guide block 150 inside the translucent member as a total reflection surface.
At this time, the protruding height of the ridgeline of the triangular prism 150c from the front surface 10-1 is approximately 2.6 mm.

A path of light incident on the inclined surface 16-2 of the light receiving unit 100 formed in this way will be described with reference to FIGS. 5, 8, 10, and 11. FIG. In the following, the translucent member is acrylic resin and the refractive index is 1.49.
First, the light path is obtained by simulation. At this time, the above-described center O and the X ₀ Y ₀ Z ₀ coordinate system are determined as follows based on the center O. That is, the length (height) in the y direction of the slope 16-2 shown in FIGS. 5 and 8 is 2h, the length 2h is assigned in the vertical direction, and a line orthogonal to the surface 150-1 is considered. in setting the center O to the position of the depth S of the plane 150-1, the upper indicating the left side shown in FIG. 8 in the z-direction the center O as the origin Z ₀ axis, in FIG. 8 in the y direction Y ₀ axis the front side shown in FIG. 8 in the x-direction and X ₀ axis.
Here, in the above specifications, 2h = 7.4 mm was calculated, and S = 3 mm was set. Thus, the center O is located within the triangular prism 150b shown in FIG. 9B, h = 3.7 mm downward from the bottom surface of the rectangular prism 150a, and the center of the width W at a position 6 mm from the front surface 100-1 of the light receiving unit 100. It is set on the surface (see FIG. 8).

FIG. 10 additionally shows an infrared light receiving element 200 in FIG. 7 of the longitudinal sectional view of the light receiving unit 100, and at an irradiation angle ψ (= + 15 ° to −30 °) on the Y ₀ Z ₀ plane shown in FIG. 6C. The result of simulating the optical path is shown.
Since the inclination angle θ of the slope 16-2 is θ = 20 ° as shown in FIG. 8, the light on the Z ₀ axis (ψ = 0) has an angle of 20 ° with respect to the normal of the slope 16-2 ( Is incident at an incident angle), is refracted so as to face slightly upward after the incident, and travels straight, reflected upward on the inner surface side of the region R of the inclined surface 100-4, reflected again on the back surface 100-2, and output surface 100. -3, the output surface 100-3 is refracted and jumps out and enters the light receiving element 200.
In addition, the light incident from ψ = + 15 ° has an incident angle on the inclined surface 16-2 of 35 ° (= θ + 15 °), so that it is greatly refracted by incident on the translucent member and travels straight, and the inclined surface 100 -4 is reflected upward on the inner surface side of the region R and travels straight in the translucent member to reach the exit surface 100-3, which refracts the exit surface 100-3 and enters the light receiving element 200.

In addition, the light incident from ψ = −10 ° has an incident angle on the inclined surface 16-2 of 10 ° (= θ−10 °) and is refracted by being incident on the translucent member, and then travels straight, and the inclined surface 100 4 is reflected upward on the inner surface side of the region R-4 and reflected again on the back surface 100-2 to reach the exit surface 100-3, which refracts the exit surface 100-3 and enters the light receiving element 200.
In addition, light incident from ψ = −20 ° travels straight without being refracted because it is incident on the translucent member from the normal direction when the incident angle to the inclined surface 16-2 is 0 ° (= θ−20 °). After being reflected upward on the inner surface side of the region R of the inclined surface 100-4 and reflected again on the back surface 100-2, it is also reflected on the front surface 100-1 to reach the exit surface 100-3. This exit surface 100-3 Is refracted out and incident on the light receiving element 200.
Further, the light incident from ψ = −30 ° has an incident angle on the inclined surface 16-2 of −10 ° (= θ−30 °), and is refracted by incident on the translucent member, and then proceeds straight. After being reflected upward on the inner surface side of the region R of 100-4 and reflected again on the back surface 100-2, it is also reflected on the front surface 100-1 to reach the exit surface 100-3, which refracts the exit surface 100-3. And then enters the light receiving element 200.

Thus, with respect to the incidence of light in the range of ψ = 15 ° to −30 ° on the X ₀ Z ₀ plane, the incident light is reflected upward by the inclined surface 100-4. It is reflected again on the back surface 100-2 and reaches the exit surface 100-3, or after being reflected on the back surface 100-2, it is reflected on the front surface 100-1 and reaches the exit surface 100-3. Then, the light that has jumped out from the emission surface 100-3 is received by the light receiving element 200.
In the process of reflection in the region of the light guide block 150, the light guide block 150 is reflected a plurality of times using the interface with the air as a total reflection surface and reaches the upper emission surface 100-3.

11A and 11B are explanatory diagrams for simulating the optical path at the irradiation angle φ on the X ₀ Z ₀ plane shown in FIG. 6A. FIG. 11A is a perspective view of the light receiving portion forming portion 10a shown in FIG. In FIG. 11B, the infrared light receiving element 200 is additionally described in FIG. 7 of the longitudinal sectional view of the light receiving unit 100, and the optical path is shown.
Since light traveling from the angle φ = 0 ° toward the center O travels on the Z ₀ axis, this corresponds to ψ = 0 ° in the above-described example of FIG. Further, since the range φ = −45 ° to + 45 ° of the incident angle φ with respect to the Z ₀ axis (φ = 0) is symmetric, φ = 0 ° to + 45 ° will be described.
Here, the incident angle of the light incident from the angle φ with respect to the inclined surface 16-2 will be briefly described with reference to FIG. FIG. 12A shows the light q incident on the inclined surface 16-2 of the capturing portion 16 from the angle φ together with the normal line Q of the inclined surface 16-2 and the Z ₀ axis (ψ = 0, φ = 0). It is. As described above, both the normal line Q and the Z ₀ axis are in the Y ₀ Z ₀ plane, the light q and the Z ₀ axis are both in the X ₀ Z ₀ plane, and the light q is incident on the inclined surface 16-2. The angle ξ is an angle formed by the normal line Q and the light q.

For example, the incident angle ξ of the light q on the inclined surface 16-2 can be obtained as follows.
As shown in FIG. 12A, the incident angle of the light q on the inclined surface 16-2 in the X ₀ Z ₀ plane is defined as “a” at the incident point on the inclined surface 16-2. Then, from the point a, the X1 axis is defined in parallel to the X0 axis, and the Y1 axis is defined in the minus direction (downward) parallel to the Y0 axis. The position r away from the point a on the Z0 axis is b, the intersection point between the line b parallel to the X1 axis and the incident line of the light q is c, and the line parallel to the Y1 axis from the point b Let the intersection with the line Q be d.
As a result, as shown in FIG. 12B, a triangular pyramid consisting of the vertex abcd and having three sides orthogonal to each other at the vertex b is obtained. The above θ is θ = ∠bad, φ is φ = ∠bac, and the incident angle ξ is ξ = ∠cad. Thus, the incident angle ξ can be obtained from the relationship cos (ξ) = cos (θ) × cos (φ) using the three-square theorem and the triangular cosine theorem.
Then, the incident angle ξ of the light q can be calculated from the given angle θ and angle φ.

The light q incident from φ = + 10 ° is calculated to have an incident angle ξ to the inclined surface 16-2 of ξ = 22.3 °, and as shown in FIG. The light travels straight from the inner surface of the region R of the inclined surface 100-4 and is reflected by the surface 100-8 and the surface 100-7 projecting from the back surface 100-2 side of the light receiving unit 100 and emitted. The light reaches the surface 100-3, and enters the light receiving element 200 while being refracted by the light emitting surface 100-3. At this time, since the light q is 20 ° (= θ) with respect to the normal of the slope 16-2 when viewed in the projected image on the Y ₀ Z ₀ plane, the optical path in FIG. It is substantially the same as ψ = 0 °.
In addition, the light q incident from φ = + 25 ° is calculated to have an incident angle ξ to the inclined surface 16-2 of ξ = 31.6 °, and is greatly refracted by incident on the translucent member as shown in FIG. 11A. Then, the straight surface 100-6 and the surface 100-8 project straight on the back surface 100-2 side of the light receiving unit 100 after reflecting straight upward on the inner surface side of the region R of the inclined surface 100-4. The light is reflected to reach the exit surface 100-3, and the light exits from the exit surface 100-3 and enters the light receiving element 200 while being refracted.
Further, although not shown, the light q incident from an angle φ larger than approximately 25 ° and directed toward the center O enters the translucent member from the side of the right triangle of the capturing unit 16 in the shape of the light receiving unit 100 of this example. Then, after entering from this side surface, it is refracted greatly and then goes straight, and is reflected obliquely upward a plurality of times on the inner surface side of the region R of the inclined surface 100-4 to reach the exit surface 100-3. 3 refracts 3 and enters the light receiving element 200.

In the above description, the light q incident on the inclined surface 16-2 has been described as going from the Y ₀ Z ₀ plane or the X ₀ Z ₀ plane toward the center O. However, the present invention is not limited to this. Since the angle φ in the projected image on the X ₀ Z ₀ plane is projected from the range of −45 ° to + 45 °, and the angle ψ in the projected image on the Y ₀ Z ₀ plane is within the range of +15 to −30 °. If there is, the light is reflected upward by the inclined surface 100-4 and repeatedly reflected inside, and eventually reaches the emission surface 100-3. The emission surface 100-3 can be refracted and jumped out to be incident on the light receiving element 200.
Further, in this example, the center O that is the origin of the X ₀ Y ₀ Z ₀ coordinates is a position separated by a distance S (S = 3 mm) from the front surface 150-1 of the light guide block 150, as shown in FIG. And set so as to deviate from the center of the rectangular cross section of the quadrangular prism 150a shown in FIG. For this reason, if the center axis of the light receiving element 200 and the center of the rectangular cross section of the quadrangular prism 150a are matched as they are, the amount of light incident on the light receiving element 200 is reduced. In this example, as shown in FIGS. The light exit surface 100-3 is slightly inclined so that sufficient light is incident thereon.
Even in the process of reflection in the region of the light guide block 150, it is reflected a plurality of times using the interface with the air of the light guide block 150 as a total reflection surface to reach the upper emission surface 100-3.

  In the apparatus of this example, the light guide block 150 is integrally formed on the translucent member of the outer frame 10, and the light receiving unit 100 is configured. When light is irradiated toward the inclined surface 16-2 of the installed capturing portion 16, the light incident from the capturing portion 16 has an interface with the air of the light guide block 150 as a reflecting surface inside the light receiving portion 100. The light is reflected a plurality of times and reaches the upper exit surface 100-3, and the light emitted from the exit surface 100-3 is received by the light receiving element 200, and the optical signal is converted into an electrical signal. Then, it is possible to cause the apparatus to perform a desired operation corresponding to the remote control operation by the user.

Next, an example of a light receiving portion forming portion of a video display device according to another embodiment of the present invention will be described with reference to FIGS.
In the example of the light receiving part forming part of FIG. 13, the light guide block of the light receiving part forming part 10 a of the example of FIGS. 5 and 6 is integrally formed at the time of forming the translucent member, whereas the light guide to the light receiving element 200. The member is joined later as a separate part.

13A is a side sectional view of the light receiving portion forming portion of this example, FIGS. 13B and 13C are perspective views showing the light receiving portion forming portion of this example broken and enlarged on the outer frame side, and FIG. FIG. 13C is an enlarged perspective view of a main part viewed from the back side.
In FIGS. 13A to 13C, 16 and 160 respectively indicate a take-in portion and a light guide member. As shown in FIG. 13A, in the light receiving portion forming portion of the outer frame 10, the left side of FIG. Only the take-in portion 16 protrudes integrally on the front surface 10-1 side shown in FIG. 2, and a shallow vertical groove 10b having a rectangular cross section on the back surface 10-2 side corresponding to the take-in portion 16 extends from the upper surface 10-3. It is provided halfway down.
Here, as shown in FIG. 13B, the setback (concave groove) in the example of FIG. 5 is not provided on the front surface 10-1 side of the translucent member in FIG. 13A. 13 corresponds to the triangular prism 150c shown in FIG. 9, and the triangular prism whose section is a right triangle is lying on the front surface 10-1 of the translucent member shown in FIG. 13B. Protrusively installed. Further, the vertical groove 10b provided on the back surface 10-2 is formed so that its width is slightly larger than the width W of the light guide member 160 shown in FIG. 13C.

The light guide member 160 formed of the same material as the translucent member includes a rectangular column 150a (region A) shown in FIG. 9B, a triangular column 150b (region B) having an inclined surface 100-4, and an upper portion of the square column 150a. The two triangular prisms 150d provided in the are integrally formed.
And the light guide member 160 is joined to the vertical groove 10b of the back surface 10-2 of the translucent member with the same resin adhesive as the translucent member (FIGS. 13B and 13C). At this time, the joining position of the light guide member 160 is such that the position of the inclined surface 100-4 with respect to the take-in portion 16 is substantially the same as the positional relationship shown in FIG.
In addition, in the joining of the light guide member 160 to the vertical groove 10b of the outer frame 10, the translucency at the joining surface 30 shown in FIG. 13A by both members becomes a problem. For example, the translucent member and the light guide member When 160 is made of an acrylic resin, the acrylic resins can be melted with a special adhesive (solvent) and directly joined so that there is no boundary surface between the two members. For this reason, the same transparency and strength can be imparted to the joint surface as if the light guide member 160 was provided integrally with the outer frame 10, and there is no problem with light transmission deterioration, light refraction, etc. at this portion.

  Of course, the apparatus having the outer frame provided with the light receiving portion forming portion in the example of FIG. 13 can achieve the same effects as when the above-described examples of FIGS. 5 and 6 are used.

  According to the apparatus of this example, a transparent frame-shaped outer frame 10 is provided for a flat display panel such as a liquid crystal panel, and a sash 20 is provided on the outer edge of the outer frame 10 so as to separate it from the indoor space. Yes. When the video screen is viewed, the video screen appears to float in the air, giving the viewer an open sense of design.

  Of course, the present invention is not limited to the above-described examples, and various other configurations can be adopted without departing from the gist of the present invention. For example, in the case of the above-described embodiment, the video display device has been described as an example. However, the present invention can be applied to other various electronic devices as long as the device is operated by receiving an optical signal such as an infrared signal. It is.

It is the perspective view seen from the front side which shows the example of the front assembly by one embodiment of this invention. It is the disassembled perspective view seen from the front side which shows the example of the front assembly by one embodiment of this invention. It is the perspective view which showed the example of the video display apparatus by one embodiment of this invention. It is the perspective view seen from the back side of FIG. The light-receiving part formation part by the example of one embodiment of this invention has fractured and expanded the principal part of the outer frame, A is a principal part expansion perspective view seen from the front side, B is seen from the back side. FIG. 5A is a plan view, FIG. 5B is a front view, and FIG. 5C is a side sectional view taken along line R2-R2 shown in FIG. FIG. 6B is a side cross-sectional view taken along R1-R1 of the light receiving portion forming portion in the example of FIG. 6B. It is explanatory drawing for demonstrating the cross-sectional shape of the example of FIG. 7, and the structure of a light guide part. FIG. 8 is a perspective view of the light guide block, and FIG. 9B is an exploded view illustrating elements constituting the light guide block. FIG. It is explanatory drawing which showed on the side sectional view the optical path in the light guide part by the simulation of the light irradiated to the optical signal taking-in part of one Embodiment. BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which shows the optical path in the light guide part by the simulation of the light irradiated to the optical signal taking-in part of one Embodiment, A is a perspective view which shows the example of an optical path in a light-receiving part formation part, B is an optical path It is explanatory drawing which showed on the sectional side view. It is explanatory drawing of the incident angle with respect to the inclined surface of the light which injects into the optical signal taking-in part of one Embodiment, A is explanatory drawing of the reference | standard prescribed | regulated to the inclined surface, B is explanatory drawing of the triangular pyramid extracted from A. The light-receiving part formation part by the example of other embodiment of this invention is showing the principal part of an outer frame fractured | expanded, A is sectional drawing of the light-receiving part formation part, B was seen from the front side The principal part expansion perspective view, C is the principal part expansion perspective view seen from the back side.

Explanation of symbols

  10-1, 100-1 ... front, 10-2, 100-2 ... back, 16 ... taking-in part, 100 ... light receiving part 100-3 ... emitting surface, 100-4 ... inclined surface, 200 ... light receiving element

Claims (7)

In an electronic device operated on the basis of a received optical signal,
A translucent member having translucency constituting an exterior member of the electronic device body;
A light receiving element that receives the optical signal and converts it into an electrical signal,
An electronic apparatus comprising: an optical signal capturing unit provided in the translucent member; and a light guide unit that guides the optical signal incident on the capturing unit to the light receiving element. The electronic device according to claim 1.
The taking-in part and the light guide part are provided integrally with the translucent member,
The light guide section;
It is composed of a quadrangular prism portion that forms a substantially rectangular parallelepiped, a first triangular prism portion that has a right triangle in cross section, and a second triangular prism portion,
The first triangular prism portion is integrally provided with the bottom surface of the square prism portion on the first side surface of the first and second side surfaces corresponding to the two sides adjacent to the right angle apex angle of the right triangle of the first triangular prism portion; A slope corresponding to the hypotenuse facing the apex angle of the second triangular prism portion is integrally provided on the side surface,
An electronic device, wherein a ridge line corresponding to the first apex angle of the second triangular prism portion is provided in parallel and projecting with respect to a front surface of the square prism portion. The electronic device according to claim 2.
The cross section of the first triangular prism portion is a right-angled isosceles triangle, and the first side surface of the first triangular prism portion and the bottom surface of the quadrangular prism portion have substantially the same size,
An electronic device according to claim 2, wherein a cross section of the second triangular prism portion is a right triangle, and the first apex angle is a right angle. The electronic device according to claim 2.
An electronic apparatus that projects the optical signal from a side of the ridge line of the second triangular prism portion projecting from the front surface of the quadrangular prism portion of the light guide portion. The electronic device according to claim 4.
The translucent member has a flat plate shape, and the rectangular column part of the light guide unit formed integrally with the translucent member,
A predetermined amount of the front surface of the quadrangular column portion is set back in parallel with the one surface of the translucent member in the thickness direction of the one surface, and the back surface of the quadrangular column portion is set to the other surface of the translucent member. An electronic device formed so as to project from The electronic device according to claim 1.
Protruding the front part of the translucent member, which is the light-projecting side of the optical signal, the capturing portion in which a triangular prism is horizontally disposed,
The light guide section is composed of a quadrangular prism portion having a substantially rectangular parallelepiped shape and a first triangular prism portion whose section disposed on the lower surface of the quadrangular prism portion forms a right triangle, and a cross-sectional right triangle of the first triangular prism portion. Of the first and second side surfaces corresponding to the two sides adjacent to the right angle apex angle, the bottom surface of the quadrangular column portion is integrated with the first side surface, and the second side surface is flush with the front surface of the quadrangular column portion. Provided in
An electronic device, wherein the first triangular prism portion is disposed on the back surface of the translucent member facing the take-in portion. In a video display device having an exterior member made of a translucent member around the display unit and operated based on a received optical signal,
A light receiving element that receives the optical signal and converts it into an electrical signal;
An image display device comprising: an optical signal capturing unit provided in the translucent member; and a light guide unit that guides the optical signal incident on the capturing unit to the light receiving element.

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