JP4305665B2 - Display device - Google Patents

Description

  The present invention relates to a display device using a fluorescent display tube, and more particularly to a display device that displays a design portion through a fluorescent display tube.

2. Description of the Related Art Conventionally, a display device using a fluorescent display tube has a filament-shaped cathode, a grid, and an anode electrode sealed in a vacuum box-shaped container formed by using two plate-shaped glasses. The phosphor is applied on the anode electrode, and emits light in various shapes such as segments, dots, or symbols. By providing a filter, the phosphor can emit light in various colors ( (See Patent Document 1 below).
JP-A-60-65557 (see FIG. 1)

  When such a fluorescent display tube is used in a vehicle display device, the vehicle display device uses various colors as display colors. For example, various colors such as red, blue, and amber are used in the display that displays the status of the vehicle, such as the parking brake operating status and high beam operating status. Although it is possible to use a fluorescent display tube for such a display device for a vehicle, since various colors are used, there is a problem in that the cost of the fluorescent display tube is increased.

  Therefore, in order to reduce the number of colors used in the fluorescent display tube, a display device 101 as shown in FIGS. 4 and 5 is considered. The display device 101 includes a fluorescent display tube 102 and an illumination device 103.

  The fluorescent display tube 102 includes a front glass 104 and a back glass 105, and the two glasses 104 and 105 are surrounded by a glass 106 to form a sealed container. In this sealed container, a filament 107, a grid 108, an anode electrode (not shown), a phosphor 110 provided on the anode electrode, an insulating layer 111 and a wiring 112 are accommodated. The speed of the vehicle is displayed by driving the anode electrode provided with the phosphor 110. The anode electrode and the wiring 112 are connected through a through hole provided in the insulating layer 111. Further, the wiring 112 is connected to an external circuit through the lead 114. The wiring 112 is made of metal and has a light-shielding property that does not allow light to pass therethrough, and a part of the wiring 112 is removed so that a vehicle direction indication, a parking brake operating state, a headlight high beam operating state, etc. The design part 102a which displays the state of is formed.

  The illuminating device 103 is provided behind the fluorescent display tube 102 and illuminates the design portion 102a from the back, and includes a diffusing and transmitting member 118 and a light emitting diode 119 that is a light source. The diffuse transmission member 118 is made of a synthetic resin containing fine particles for light diffusion and is milky white. The light emitting diodes 119 have different emission colors depending on the respective design portions 102a, the direction indication for instructing the traveling direction of the vehicle is green emission color, the parking brake operation state is red emission color, and the high beam of the headlamp The operating state is a blue emission color. Reference numeral 120 denotes a case made of a white non-transparent synthetic resin, and reference numeral 121 denotes a hard circuit board. A partition wall 122 is formed in the case 120, and an illumination chamber 123 corresponding to each design part 102 a is formed by the partition wall 122. This display device 101 could be manufactured at a lower cost than a conventional display device having only a fluorescent display tube.

  However, in the display device 101, when two or more design parts 102 a are arranged close to each other, when one design part 102 a is illuminated, the light L that illuminates one design is reflected by the back surface of the wiring 112 and is within the back glass 105. There is a problem that even if the other design portion 102a is illuminated and the light source 119 of the other design portion 102a is not lit, a phenomenon of pseudo-lighting that appears to be lit occurs. Therefore, the main object of the present invention is to provide a display device using a fluorescent display tube that is inexpensive and can suppress the occurrence of pseudo-lighting of the design portion even when two or more design portions are arranged close to each other. To do.

In order to achieve the above object, the present invention accommodates an electrode provided with a filament, a grid and a phosphor in a sealed container in which the periphery of a front glass and a rear glass is surrounded by glass, and is connected to the electrode on the rear glass. And a display member having a fluorescent display tube provided with wiring, a diffuse transmission member having a design portion, and a light source that transmits and illuminates the design portion, and an illumination chamber that accommodates the light source corresponding to the design portion. Provided in the display member, the display member is provided behind the fluorescent display tube, and two or more of the design portions are brought close to each other, and an opening for transmitting and displaying the two or more design portions in close proximity is displayed in the wiring The design portion is formed of a light shielding layer provided on the front surface of the diffuse transmission member .

  Further, a back light-shielding layer is provided on the back surface between the design portions of the diffuse transmission member.

According to the present invention, a display using a fluorescent display tube that can achieve the intended purpose, is inexpensive, and can suppress the occurrence of pseudo-lighting of the design portion even when two or more design portions are arranged close to each other. An apparatus can be provided.

Hereinafter, a display device according to the present invention will be described with reference to the drawings. 1 to 3 show a first embodiment of the present invention.

  The display device 1 according to the present invention is for a vehicle and includes a fluorescent display tube 2 and a display member 3. The speed of the vehicle is displayed numerically on the fluorescent display tube 2, and the direction of the vehicle is indicated on the display member 3, in this embodiment, the direction of the vehicle, the operating state of the parking brake, and the high beam of the headlamp. The operating state is displayed.

  The fluorescent display tube 2 includes a front glass 4 and a back glass 5, and the two glasses 4 and 5 are surrounded by a glass 6 to form a sealed container. In this sealed container, a filament 7, a grid 8, an anode electrode 9, a phosphor 10 provided on the anode electrode 9, an insulating layer 11 and a wiring 12 are accommodated. A wiring 12 is provided on the back glass 5, and an insulating layer 11, an anode electrode 9, and a phosphor 10 are laminated on the wiring 12. The anode electrode 9 and the wiring 12 are connected through a through hole 13 provided in the insulating layer 11. Further, the wiring 12 is connected to an external circuit through a lead 14. In this embodiment, the wiring 12 is made of metal and has a light shielding property that does not transmit light, and has a large area in order to prevent light from being transmitted from the back surface of the fluorescent display tube 2. Further, openings 15 a and 15 b are provided in the wiring 12 and the insulating layer 11 in order to display through the design portion of the display member 3.

  The fluorescent display tube 2 emits electrons from the filament 7, and the emitted electrons are attracted and accelerated by the positive potential applied to the grid 8 and the anode electrode 11, and the accelerated electrons are provided on the anode electrode 11. 10 hits and emits light. In this embodiment, the vehicle speed is displayed by selectively applying a potential to the grid 8 and the anode electrode 11.

  The display member 3 includes a diffuse transmission member 18 having a design portion 17 formed of a light shielding layer 16 on the front surface, and a light emitting diode 19 which is a light source that transmits and illuminates the design portion 17. The diffuse transmission member 18 is made of a synthetic resin containing fine particles for light diffusion and is milky white. The light shielding layer 16 is printed and formed using black ink. In the present embodiment, the design part 17 is a design part 17a, 17b for indicating the direction of travel of the vehicle, a design part 17c for operating the parking brake, and a design part 17d for operating the high beam of the headlamp. Each of the design portions 17a to 17d is a negative display in which the light-transmitting layer 18 is exposed without providing the light shielding layer 16. In this embodiment, the direction indicating design portion 17b, the parking brake design portion 17c, and the high beam design portion 17d are close to each other and display through the opening 15b of the fluorescent display tube 2. Further, the direction indicating design portion 17a displays through the opening 15a.

  The light emitting diode 19 has a different emission color depending on the design portions 17a to 17d, the direction indicating design portions 17a and 17b have a green emission color, the parking brake design portion 17c has a red emission color, and a high beam design portion. 17d is a blue emission color. In addition, 20 is a case which consists of a white non-transparent synthetic resin, and 21 is a hard circuit board. A partition wall 22 is formed in the case 20, and an illumination chamber 23 corresponding to each design portion 17 a to 17 d is formed by the partition wall 22.

With the above-described configuration, for example, when the high beam design portion 17d is turned on, the wiring 12 (insulation) of the fluorescent display tube 2 can be used even if the light from the light source 19 is emitted toward the design portion 17b of the direction indication that is close. By forming the opening 15b in the layer 11), there is no reflecting member on the direction indicating design portion 17b side, and the direction indicating design portion 17b does not illuminate through the rear glass 20, and the direction indicating design portion. The pseudo lighting of 17b can be suppressed.

  Also, as shown in FIG. 3, the back surface of the diffuse transmission member 18 is formed by printing with a black ink having a light shielding property between the direction indicating design portion 17b and the high beam design portion 17d. A rear light shielding layer 24 is formed.

  Further, by providing the back light-shielding layer 24 on the back surface of the diffusing and transmitting member 18, for example, when the high beam design portion 17d is lit, the light from the light source 19 is radiated to the design direction portion 17b of the direction indication in the vicinity. However, since the amount of light entering the diffuse transmission member 18 is suppressed, the direction indicating design portion 17b is not illuminated through the diffuse transmission member 18, and the pseudo lighting of the direction indicating design portion 17b can be suppressed. it can.

1 is a front view of a display device according to a first embodiment of the present invention. Sectional drawing of the AA line of FIG. Sectional drawing of the BB line of FIG. The front view of the conventional display apparatus. Sectional drawing of CC line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Display apparatus 2 Fluorescent display tube 3 Display member 4 Front glass 5 Back glass 6 Glass 7 Filament 8 Grid 9 Anode electrode (electrode)
DESCRIPTION OF SYMBOLS 10 Phosphor 11 Insulating layer 12 Wiring 13 Through-hole 14 Lead | read | reed 15a, 15b Opening 16 Light-shielding layer 17, 17a-17d Design part 18 Diffuse transmission member 19 Light source (light emitting diode)
20 Case 21 Circuit board 22 Partition wall 23 Lighting room 24 Back light shielding layer

Claims (2)

A fluorescent display tube in which an electrode provided with a filament, a grid, and a phosphor is housed in an airtight container surrounded by glass around the front glass and the back glass, and a wiring connected to the electrode is provided on the back glass, and a design A display member having a diffuse transmission member provided with a light source and a light source that transmits and illuminates the design portion, and an illumination chamber that accommodates the light source corresponding to the design portion is provided in the display member, and the display member is Provided behind the fluorescent display tube, two or more of the design portions are arranged close to each other, and an opening for transmitting and displaying the two or more design portions adjacent to each other is provided in the wiring, and the design portions are provided on the diffusion transmission member. A display device characterized by being formed of a light-shielding layer provided on the front surface . The display device according to claim 1, wherein a back light-shielding layer is provided on a back surface between the design portions of the diffuse transmission member.

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