JP2016071118A - Remote control apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a remote control device that prevents foreign substances from entering a space between a liquid crystal display device and a light guide body to suppress a reduction in display quality of the liquid crystal display device.SOLUTION: There is provided a remote control apparatus 1 including a circuit board 6, a light source 7 that is mounted on the circuit board 6, a light guide body 8 that guides light from the light source 7, a liquid crystal display device 5 that is illuminated with the light guided by the light guide body 8, and a holder 9 that holds the light guide body 8 and liquid crystal display device 5, where a diffusion member 10 and a light-shielding member 11 are provided between the light guide body 8 and liquid crystal display device 5; the light-shielding member 11 has an outer shape formed larger than an outer shape of the diffusion member 10; the light-shielding member 11 and liquid crystal display device 5 are bonded to each other and the light-shielding member 11 is bonded and fixed to the holder 9 holding the light guide body 8.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a remote control device including a liquid crystal display element.

  A conventional remote control device includes a liquid crystal display element that displays a setting state and the like, and a light guide that guides light from a light source to the liquid crystal display element (see, for example, Patent Document 1).

JP 2003-343903 A

  In the conventional remote control device, there is a possibility that foreign matter such as dust may enter between the liquid crystal display element and the light guide, and there is a concern that the display quality of the liquid crystal display element is deteriorated by the foreign matter. It was done.

  Therefore, the present invention pays attention to the above-mentioned problems, and provides a remote control device that prevents foreign matter from entering between the liquid crystal display element and the light guide and suppresses the deterioration of the display quality of the liquid crystal display element. The purpose is to do.

  In order to solve the above problems, the present invention is illuminated with a circuit board, a light source mounted on the circuit board, a light guide for guiding light from the light source, and light guided by the light guide. In a remote control device including a liquid crystal display element, the light guide, and a holder that holds the liquid crystal display element, a diffusion member and a light shielding member are provided between the light guide and the liquid crystal display element. The outer shape of the light shielding member is formed larger than the outer shape of the diffusing member, the light shielding member and the liquid crystal display element are attached, and the light shielding member is attached and fixed to the holder holding the light guide It is.

  With the above configuration, the present invention can achieve the intended purpose, prevent foreign matter from entering between the liquid crystal display element and the light guide, and suppress deterioration in display quality of the liquid crystal display element. Remote control devices can be provided.

The front view of the remote control device of 1st Embodiment of this invention. Sectional drawing of the II-II line in FIG. 1 of the embodiment. Sectional drawing of the III-III line in FIG. 1 of the embodiment. The front view of the liquid crystal display element and holder of the embodiment. The front view of the light guide and holder of the embodiment. The rear view of the light guide and holder of the embodiment. FIG. 5 is an exploded sectional view taken along line VII-VII in FIG. 4 of the embodiment. The exploded sectional view of the VIII-VIII line in Drawing 4 of the embodiment.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  The remote control device 1 of the present invention communicates and operates with devices such as an air conditioner by means such as infrared rays and wireless communication.

  The remote operation device 1 includes a case 2, a display unit 3, and operation buttons 4.

  The case 2 is made of synthetic resin, and is composed of an upper case 2a and a lower case 2b that are divided into upper and lower parts, and incorporates a display unit 3 and the like. Further, the upper case 2a is provided with a transmission cover 2c made of a transparent resin that is visible through the liquid crystal display element 5 of the display unit 3.

  The display unit 3 is a liquid crystal display element 5 in the present embodiment.

  The operation button 4 performs an operation such as pressing when changing the setting of the air conditioner. In the case 2, a control circuit that generates a control signal for controlling the air conditioner is provided on a circuit board 6 built in the case 2.

  In the case 2, a liquid crystal display element 5, a circuit board 6, a light source 7 mounted on the circuit board 6, a light guide 8, a holder 9, a diffusing member 10, and a light shielding member 11 are incorporated.

  The liquid crystal display element 5 is one in which liquid crystal molecules are sealed between two glass substrates, and displays by changing the arrangement of the liquid crystal molecules according to an applied electric signal. The liquid crystal display element 5 is electrically connected to a connector 6a provided on the circuit board 6 by a flexible wiring board 5a. In addition, although the liquid crystal display element 5 is provided with the polarizing plate etc., it is a known technique and description is abbreviate | omitted. In the liquid crystal display element 5, the light from the light source 7 is guided by the light guide 8 and is transmitted and illuminated from behind.

  The circuit board 6 is a hard board, and an insulating material such as glass epoxy resin is used as a base material. A wiring pattern made of a conductive metal such as copper is provided on the surface of the insulating material. Electronic components that form the light source 7 and the control circuit are mounted on the wiring pattern.

  The light source 7 is a light emitting diode that is surface-mounted on the circuit board 6, and the light source 7 emits light along the plate surface of the circuit board 6.

  The light guide 8 guides the light from the light source 7 and is made of a transparent synthetic resin. The light guide 8 has a rectangular flat plate shape, and the cross-sectional shape thereof is an L shape. A portion corresponding to the long side portion of the L shape is the light guide plate portion 8a facing the back surface of the liquid crystal display element 5, and a portion corresponding to the short side portion of the L shape is light receiving protruding from the light guide plate portion 8a toward the light source 7 side. It is the board part 8b. The light guide plate portion 8a has a rectangular flat plate shape, and processing for efficiently reflecting the light of the light source 7 is performed on the back side of the light guide plate portion 8a, that is, the surface opposite to the liquid crystal display element 5. Has been. The light receiving portion 8c facing the light source 7 of the light receiving plate portion 8b is a curved surface in order to efficiently take in light from the light source 7.

  In addition, the light guide 8 includes protruding walls 8d at both ends of a connection portion between the light guide plate portion 8a and the light receiving plate portion 8b. The protruding wall 8d is in contact with a holder 9 described later. The light guide plate 8 includes a reflection portion 8e at a connection portion between the light guide plate portion 8a and the light receiving plate portion 8b, in which light passing through the light receiving plate portion 8b from the light source 7 is reflected to the light guide plate portion 8a. .

  The holder 9 holds the liquid crystal display element 5 and the light guide 8. The holder 9 is made of a synthetic resin that does not transmit white light. The holder 9 includes a light guide plate receiving surface 9a facing the light guide plate portion 8a of the light guide 8, and a wall portion 9b provided around the light guide plate receiving surface 9a and surrounding three sides of the light guide 8. A storage chamber 9c for storing the light receiving plate portion 8b of the light guide 8 and the light source 7, a holding wall 9d for holding the four corners of the liquid crystal display element 5, and a back surface of the light guide plate receiving surface 9a are in contact with the circuit board 6. And a leg portion 9e.

  The light guide plate portion 8a of the light guide 8 is held by the light guide plate receiving surface 9a and the wall portion 9b.

  The storage chamber 9c surrounds the light source 7 and prevents light from leaking outside the light guide 8 to the outside of the storage chamber 9c. The storage chamber 9c includes a reflection surface 9f corresponding to the reflection portion 8e of the light guide 8, and reflects light leaked from the light guide 8 and returns it to the light guide 8 again.

  The light guide 8 is positioned and held by the holder 9 when the protruding wall 8d of the light guide 8 comes into contact with the end 9a1 of the light guide plate receiving surface 9a of the holder 9. In addition, the edge part 9a1 of the light-guide plate receiving surface 9a of the holder 9 is the storage chamber 9c side of the light-guide plate receiving surface 9a.

  The holding wall 9d is provided around the wall portion 9b. The holding wall 9 d includes protrusions 9 g that are in contact with the side surface of the liquid crystal display element 5, and holds the four corner side surfaces of the liquid crystal display element 5.

  Three leg portions 9e are provided on the back surface of the light guide plate receiving surface 9a. The number of leg portions 9e is arbitrary.

  The diffusing member 10 and the light shielding member 11 are provided between the liquid crystal display element 5 and the light guide 8. The diffusion member 10 is laminated on the light guide 8 side, and the light shielding member 11 is laminated on the liquid crystal display element 5 side.

  The diffusion member 10 is a thin plate member made of milky white synthetic resin that can transmit light. The light from the light guide 8 is diffused. The diffusing member 10 has a rectangular shape, and the size of the diffusing member 10 is equal to or slightly smaller than that of the light guide plate portion 8 a of the light guide 8 and is accommodated in the wall portion 9 b of the holder 9.

  The light shielding member 11 is a thin plate-like member that does not transmit light, and includes a frame-like portion 11b having a window portion 11a through which the central portion passes. The light shielding member 11 has a two-layer structure, and the light guide 8 side is made of a white synthetic resin member, and the liquid crystal display element 5 side is made of a black synthetic resin member. The light shielding member 11 is a white member on the light guide 8 side, reflects light from the light source 7, and divides a display area of the liquid crystal display element 5 with a black member on the liquid crystal display element 5 side.

  The outer shape of the light shielding member 11 is formed larger than the outer shape of the diffusion member 10, and the size of the window portion 11 a of the light shielding member 11 is smaller than the outer shape of the diffusion member 10. Further, the outer shape of the light shielding member 11 is equivalent to the wall portion 9 b surrounded by the holding wall 9 d of the holder 9, and the size of the window portion 11 a of the light shielding member 11 is the wall surrounded by the holding wall 9 d of the holder 9. It is smaller than the part 9b. That is, the width of the frame-shaped portion 11 b of the light shielding member 11 is formed to be larger than the width of the upper end portion of the wall portion 9 b of the holder 9.

  Adhesives are provided on both surfaces of the frame-like portion 11b of the light shielding member 11, and are attached to the liquid crystal display element 5 on the liquid crystal display element 5 side of the light shielding member 11, and on the light guide body 8 side of the light shielding member 11. Further, it is affixed to the outer peripheral end portion of the diffusing member 10, and is further affixed to the upper end portion of the wall portion 9 b of the holder 9 to be fixed to the holder 9. Further, in a portion where the wall portion 9 b of the holder 9 is not provided (on the end portion 9 a 1 side of the light guide plate receiving surface 9 a of the holder 9), the diffusion member 10 attached to the light shielding member 11 contacts the liquid crystal display element 5. This prevents foreign matter from entering from this area.

  As described above, the circuit board 6, the light source 7 mounted on the circuit board 6, the light guide 8 that guides the light from the light source 7, and the liquid crystal display that is illuminated by the light guided by the light guide 8 In the remote control device 1 including the element 5, the light guide 8, and the holder 9 that holds the liquid crystal display element 5, the diffusion member 10 and the light shielding member 11 are disposed between the light guide 8 and the liquid crystal display element 5. The outer shape of the light shielding member 11 is formed larger than the outer shape of the diffusing member 10, and the light shielding member 11 and the liquid crystal display element 5 are attached, and the light shielding member 11 and the light guide 8 are attached to the holder 9. By fixing, it is possible to provide the remote control device 1 that prevents foreign matter from entering between the liquid crystal display element 5 and the light guide 8 and suppresses deterioration in display quality of the liquid crystal display element 5.

  Further, by providing the holder 9 with the storage chamber 9c for storing the light source 7, it is possible to provide the remote control device 1 that suppresses unnecessary light leakage of the light source 7 and illuminates the liquid crystal display element 5 satisfactorily.

  Further, a light source mounted on the surface by providing the light guide 8 with a light guide plate portion 8a facing the back surface of the liquid crystal display element 5 and a light receiving plate portion 8b protruding from the light guide plate portion 8a to the light source 7 side. Can be used, and an inexpensive remote control device 1 can be provided.

  In addition, projecting walls 8d are provided at both ends of the connection portion between the light guide plate portion 8a and the light receiving plate portion 8b, and the projecting walls 8d contact the end portion 9a1 of the light guide plate receiving surface 9a facing the light guide plate portion 8a of the holder 9. By contacting, the remote control device 1 that can position and hold the light guide 8 on the holder 9 without using a fastener such as a screw can be provided.

  The present invention can be used for a remote control device that holds a liquid crystal display element and a light guide in a holder.

DESCRIPTION OF SYMBOLS 1 Remote operation apparatus 2 Case 2a Upper case 2b Lower case 2c Transmission cover 3 Display part 4 Operation button 5 Liquid crystal display element 5a Flexible wiring board 6 Circuit board 6a Connector 7 Light source 8 Light guide body 8a Light guide plate part 8b Light receiving plate part 8c Light reception Part 8d Projection wall 8e Reflection part 9 Holder 9a Light guide plate receiving surface 9a1 End part 9b Wall part 9c Storage chamber 9d Holding wall 9e Leg part 9f Reflection surface 9g Projection 10 Diffusion member 11 Shading member 11a Window part 11b Frame-like part

Claims (4)

A circuit board; a light source mounted on the circuit board; a light guide that guides light from the light source; a liquid crystal display element that is illuminated by light guided by the light guide; the light guide and the liquid crystal And a holder for holding the display element, wherein a diffusion member and a light shielding member are provided between the light guide and the liquid crystal display element, and the outer shape of the light shielding member is the outer shape of the diffusion member. A remote control device having a larger size, affixing the light shielding member and the liquid crystal display element and affixing the light shielding member to the holder holding the light guide. The remote control device according to claim 1, wherein a storage chamber for storing the light source is provided in the holder. 2. The remote control according to claim 1, wherein the light guide is provided with a light guide plate portion facing the back surface of the liquid crystal display element and a light receiving plate portion protruding from the light guide plate portion toward the light source. apparatus. Protruding walls are provided at both ends of the connection portion between the light guide plate portion and the light receiving plate portion, and the projecting walls abut on the end portion of the light guide plate receiving surface facing the light guide plate portion of the holder. The remote control device according to claim 1.

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