JP2006086721A - Infrared remote control signal light receiver and television receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an infrared remote control signal light receiver capable of satisfactorily controlling a controlled apparatus. <P>SOLUTION: The infrared remote control signal light receiver for a controlled apparatus controllable by infrared remote control signals comprises a light guide 19 having a first light guide section 19a facing a light receiving element 18 from above a light receiving window 12 of the controlled apparatus, between this window 12 and the light receiving element 18, and a second light guide section 19b in a vertical direction along the light receiving window 12. A specified spacing is provided between the light receiving window 12 and the light receiving element 18 of the controlled apparatus, and the light receiving window 12 is vertically long as prescribed, compared with a light receiver of the light receiving element 18. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an infrared remote control signal receiver and a television receiver having the infrared remote controller signal receiver.

  In general, an infrared remote control device is used to remotely control various controlled devices such as a television receiver. As an infrared remote control signal receiving device that receives an infrared remote control signal from the infrared remote commander of this infrared remote control device, for example, as shown in FIGS. 8 and 9, a television receiver that is controlled by an infrared remote control signal is used. A light receiving window is provided on, for example, the front panel 1 on the front surface of the controlled device such as a machine, and light incident on the light receiving window 2 is guided to the light receiving element 3 such as a light receiving diode provided inside the light receiving window 2. For this purpose, a light guide 4 is provided.

  The conventional light guide 4 is made of a resin that transmits infrared rays such as polycarbonate and acrylic. As shown in FIGS. 8 and 9, the front surface has the same size as the light receiving window 2, for example, the width is 5 mm and the length is 15 mm. Is a rectangular parallelepiped having a predetermined length, for example, 15 mm.

  The reason why the light guide 4 is set to a predetermined length of 15 mm, for example, is a design reason for making the light receiving element 3 such as a light receiving diode provided inside the light receiving window 2 invisible from the front surface.

  By the way, when the infrared remote control device is operated at a position close to the place where the high frequency inverter fluorescent lamp is installed as shown in FIG. 9, the infrared remote control signal light receiving device of the controlled device such as the television receiver is infrared. In addition to the remote control signal a, light b from the high-frequency inverter fluorescent lamp 5 is received, and under the influence of the light b from the high-frequency inverter fluorescent lamp 5, malfunctions such as the infrared remote control signal a being indistinguishable may occur. is there.

  The malfunction is that the high-frequency inverter fluorescent lamp has a light emission cycle of about 40 kHz and the frequency of the carrier signal of the infrared remote control signal is about 40 kHz. As shown in FIG. 9, the light b of the high-frequency inverter fluorescent lamp 5 incident on the light guide 4 from above is reflected on the lower surface of the rectangular light guide 4 and is combined with the infrared remote control signal a. This is because the light is incident on the light receiving element 3 and interferes therewith.

  Therefore, conventionally, in order to prevent malfunction due to the light b of the high-frequency inverter fluorescent lamp 5, a visible light cut filter and an interference film filter for cutting light having a wavelength longer than the infrared wavelength are superimposed on the light receiving window. There has been proposed a filter in which a filter configured as described above is mounted (Patent Document 1).

In addition, Japanese Patent Application Laid-Open No. H10-228667 proposes a cylindrical body provided in front of the light receiving window in place of the interference film filter described above.
JP-A-5-122774

  However, a filter configured by superimposing a conventional visible light cut filter and an interference film filter that cuts light having a wavelength longer than the wavelength of infrared light is difficult to manufacture and has a disadvantage of being expensive.

  Further, when the cylindrical body is provided in front of the light receiving window, there is a disadvantage that the range of the infrared remote control signal incident on the light receiving element is limited by the cylindrical body and becomes narrow.

  In view of such a point, the present invention has a relatively simple configuration and does not narrow the range of the infrared remote control signal incident on the light receiving element so as not to be affected by light from the high-frequency inverter fluorescent lamp. For the purpose.

  The infrared remote control signal light receiving device of the present invention is an infrared remote control signal light receiving device of a controlled device that is controlled by an infrared remote control signal. The infrared remote control signal light receiving device has a predetermined interval between a light receiving window and a light receiving element of the controlled device. The light receiving window has a predetermined longitudinal length compared to the light receiving portion of the light receiving element, and the first light guiding portion in the direction of the light receiving element is provided between the light receiving window and the light receiving element from above the light receiving window. A light guide having a second light guide in the vertical direction along the light receiving window is provided.

  The television receiver of the present invention has an infrared remote control signal light receiving device, and in the television receiver controlled by the infrared remote control signal, a predetermined distance is provided between the light receiving window and the light receiving element of the infrared remote control signal light receiving device. The light receiving window has a predetermined vertical length as compared with the light receiving portion of the light receiving element, and a first light guide in the direction of the light receiving element is provided between the light receiving window and the light receiving element from above the light receiving window. And a light guide body having a second light guide portion in the vertical direction along the light receiving window.

  According to the present invention, the first light guide portion in the direction of the light receiving element is provided between the light receiving window and the light receiving element from above the light receiving window, and the second light guide portion in the vertical direction along the light receiving window. Since the infrared remote control signal from the infrared remote commander is guided to the light receiving element through the first light guide unit, the light from the high frequency inverter fluorescent lamp from above passes along the light receiving window. It is guided downward through the second light guide part in the vertical direction and is not guided to the light receiving element, and this infrared remote control signal is not affected by the light of the high frequency inverter fluorescent lamp, and the controlled device is improved. Can be controlled.

  Further, according to the present invention, since the first light guide section has a predetermined length, it is possible to hide the light receiving element and the like inside the light receiving window, and there is no design inconvenience.

  Further, according to the present invention, the first light guide portion in the direction of the light receiving element is provided between the light receiving window and the light receiving element from above the light receiving window, and the second light guide portion in the vertical direction along the light receiving window is provided. Since the light guide is provided, the structure is relatively simple, and light from above is guided to the second light guide and not guided to the light receiving element. The incident range is not narrowed.

Hereinafter, an example of the best mode for carrying out the infrared remote control signal receiving device and the television receiver of the present invention will be described with reference to the drawings.
In this example, an infrared remote control signal light receiving device according to this example is provided on a flat-screen television receiver using the liquid crystal display panel according to this example.

  FIG. 2 shows the flat-type television receiver according to this example as a whole, 10 is a cabinet, and 11 is a color liquid crystal display panel. This television receiver is configured to be remotely controlled by an infrared remote control device. Speaker grills 10L and 10R are provided on the left and right sides of the front surface of the cabinet 10, and the right speaker grill 10R and the liquid crystal display panel 11 are provided. A light receiving window 12 for receiving an infrared remote control signal is provided at a predetermined position below the inclined portion 10a provided therebetween.

  The light receiving window 12 is a vertically long rectangle having a horizontal width of, for example, 5 mm and a vertical length of, for example, 15 mm. A power source display unit 13 made of, for example, a light emitting diode, a BS power source display unit 14, an off-timer display unit 15, and a scheduled recording display unit 16 are provided above the light receiving window 12 of the inclined portion 10a.

  In this example, as shown in FIGS. 1 and 3, the light receiving window 12 at a predetermined position below the inclined portion 10 a between the speaker grill 10 </ b> R on the right side of the cabinet 10 and the liquid crystal display panel 11 and the interior of the cabinet 10. A light guide 19 for guiding light to the light receiving element 18 is provided between the light receiving element 18 such as a light receiving diode that receives an infrared remote control signal provided on the wiring board 17.

  In this case, the distance between the front side of the light receiving window 12 of the cabinet 10 of the television receiver and the light receiving element 19 is set to be slightly larger than a predetermined distance, for example, 15 mm, and the light receiving element 18 corresponds to the upper side of the light receiving window 12. Do it like this.

  The light receiving portion of the light receiving element 18 has a diameter of about 3 mm, for example, and is smaller than the longitudinal length of the light receiving window 12, for example, 15 mm.

  The light guide 19 is made of a resin that transmits infrared rays, such as polycarbonate and acrylic, and has a shape in which the light receiving window side of the light guide 19 is fitted to the light receiving window 12 as shown in FIGS. 1, 3, and 4. For example, the horizontal width is 5 mm, the vertical length is 15 mm, and a prismatic first light guide portion 19 a that guides light in the direction of the light receiving element 18 from a portion corresponding to the upper portion of the light receiving window 12 is provided and the light receiving is provided. A prismatic second light guide portion 19 b in the vertical direction along the window 12 is provided.

  The length of the first light guide 19a is a predetermined length, for example, 15 mm from the front surface of the light receiving window 12 to the light receiving element 18, and the vertical length of the end surface corresponding to the light receiving element 18 of the first light guide 19a. The thickness is set to a predetermined length, for example, 5 mm, and the end face is set to 5 mm square.

  Further, the length of the second light guide portion 19b in the direction of the light receiving element 18 is set so that the light b from the high frequency inverter fluorescent lamp 5 from above is not reflected by the lower surface of the first light guide portion 19a. And the length guided by the second light guide 19b is, for example, 5 mm.

  In this case, in this example, the longitudinal section in the direction of the light receiving element 18 from the light receiving window 12 of the light guide 19 is formed in an inverted L shape as shown in FIGS.

  In this example, as shown in FIGS. 1 and 3, the inverted L-shaped light guide 19 is fitted with the light guide window 12 on the second light guide portion 19b side of the light guide 19 and the light guide 19 is guided. The front surface of the light body 19, the front surface of the color liquid crystal display panel 11, and the front surfaces of the speaker grilles 10L and 10R are fixed so as to be flush with each other.

  In this case, the distance between the light receiving element side end face of the first light guide 19a of the light guide 19 and the light receiving element 18 is set to approximately 1 to 2 mm.

  In this example, as described above, the first light guide portion 19a in the direction of the light receiving element 18 from the upper part of the light receiving window 12 is provided between the light receiving window 12 and the light receiving element 18 on the front surface of the cabinet 10 of the television receiver. In addition, since the light guide 19 having the second light guide 19b in the vertical direction along the light receiving window 12 is provided, the infrared remote control signal a from the infrared remote commander is the first as shown in FIGS. The light b from the high-frequency inverter fluorescent lamp 5 from above is guided to the light receiving element 18 through the light guide portion 19a of the light and passes through the second light guide portion 19b in the vertical direction along the light receiving window 12 as shown in FIG. The infrared remote control signal a is not guided to the light receiving element 18 through the light, and the infrared remote control signal a is not affected by the light b of the high frequency inverter fluorescent lamp 5, so that the television receiver can be controlled well. .

  Further, in this case, light (infrared remote control signals) a, a1 and a2 incident from the front of the light receiving window 12 (light guide 19) and diagonally from left to right (within 30 degrees left and right) are the same as in the prior art as shown in FIG. The light is guided by the first light guide 19 a and is incident on the light receiving element 18.

  In addition, according to this example, the first light guide portion 19a has a predetermined length of 15 mm, for example, so that the light receiving element 18 and the like inside the light receiving window 12 can be made invisible, and there is no design inconvenience.

  In addition, according to this example, the first light guide portion 19 a in the direction of the light receiving element 18 is provided from the upper part of the light receiving window 12 between the light receiving window 12 and the light receiving element 18, and the first vertical direction along the light receiving window 12 is provided. Since the light guide 19 having the two light guides 19b is provided, the structure is relatively simple, and the light b from above is guided to the second light guide 19b and not to the light receiving element 18. Therefore, the incident range of the infrared remote control signal to the light receiving element 18 is not narrowed.

  7A and 7B show modifications of the light guide 19 respectively. 7A is an example in which the first light guide 19a of the light guide 19 shown in FIGS. 1 and 4 is lowered slightly below the upper end, and the light guide 19 shown in FIG. 7A is used. However, it can be easily understood that the same effect as the above-mentioned column can be obtained.

  7B is an example in which the lower end portion of the second light guide portion 19b of the light guide 19 shown in FIGS. 1 and 4 is bent and extended in the direction of the light receiving element 18, and is shown in FIG. 7B. It can be easily understood that the same effects as the above-described example can be obtained even if the light guide 19 is used.

  In the above-described example, the first and second light guide portions 19a and 19b of the light guide 19 have been described as being prismatic, but it is needless to say that other shapes may be used.

  In the above example, the present invention is applied to a television receiver. However, it is needless to say that the present invention can be applied to other controlled devices that are controlled by an infrared remote control signal.

  Further, the present invention is not limited to the above-described example, and various other configurations can be adopted without departing from the gist of the present invention.

It is a longitudinal cross-sectional view of the principal part which shows the example of the best form for implementing this invention infrared remote-control signal light-receiving device. It is a front view which shows the example of the best form for implementing the television receiver which has this invention infrared remote control signal light-receiving device. FIG. 3 is a cross-sectional view of a main part of FIG. 2. It is a perspective view which shows the example of the principal part of this invention. It is a perspective view of the example of the principal part used for description of this invention. It is a perspective view of the example of the principal part used for description of this invention. It is a perspective view which shows the other example of the principal part of this invention. It is a longitudinal cross-sectional view of the principal part which shows the example of the conventional infrared remote control signal light-receiving device. It is a perspective view of the principal part used for description of a prior art example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Cabinet, 11 ... Color liquid crystal display panel, 12 ... Light receiving window, 18 ... Light receiving element, 19 ... Light guide, 19a ... 1st light guide part, 19b ... 2nd light guide Part

Claims (4)

  In the infrared remote control signal light receiving device of the controlled device controlled by the infrared remote control signal, the light receiving window of the controlled device has a predetermined interval between the light receiving window and the light receiving element, and the light receiving window is a light receiving portion of the light receiving element. And a first light guide portion in the direction of the light receiving element from the upper part of the light receiving window between the light receiving window and the light receiving element, and in the vertical direction along the light receiving window. An infrared remote control signal light receiving device comprising a light guide body having two light guide portions. In the infrared remote control signal light receiving device according to claim 1,
An infrared remote control signal light receiving device, wherein the light guide has an inverted L-shaped longitudinal section in the light receiving element direction from the light receiving window. In a television receiver having an infrared remote control signal receiving device and being controlled by an infrared remote control signal,
A distance between the light receiving window and the light receiving element of the infrared remote control signal light receiving device is set to a predetermined distance, and the light receiving window is set to have a predetermined longitudinal length as compared with the light receiving portion of the light receiving element, and between the light receiving window and the light receiving element. A television having a first light guide in the light receiving element direction from above the light receiving window and a second light guide in the vertical direction along the light receiving window is provided. Receiver. The television receiver according to claim 3, wherein
The television set according to claim 1, wherein the light guide has a reverse L-shaped longitudinal section in the light receiving element direction from the light receiving window.

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