JP5462513B2 - Motorcycle liquid crystal display device - Google Patents

Description

  The present invention relates to a liquid crystal display device for a motorcycle including a liquid crystal panel.

  In general, in a motorcycle, a meter unit (display device) including a speed meter for displaying the speed of the vehicle is provided at a position that is highly visible to the driver. Normally, such a meter unit is provided with an odometer that displays the total travel distance, a trip meter that displays the travel distance for each travel and can be reset arbitrarily by the driver, in addition to the speed meter.

  It is preferable that the meter unit has a specification that sufficiently exhibits its display function so that the driver can immediately view information that the driver wants to know while traveling. For example, it is desirable to visualize information such as traveling speed in various variations and display it as an image appealing to the driver's vision.

  Patent Document 1 discloses a technical idea in which a plurality of display window portions are provided in a single case, and an electronic circuit board that controls the operation of each liquid crystal panel is arranged in a wide area including each display area in the case. ing. According to the invention of this Patent Document 1, it is not necessary to install a circuit portion common to each liquid crystal panel, and the transmission light of adjacent light guide plates does not interfere with each other due to the presence of the light shielding portion. The brightness and color of the liquid crystal panel can be set or adjusted independently according to their use.

JP-A-62-17788

  In the display device disclosed in Patent Document 1, two sets of liquid crystal panels, lamps, and light guides corresponding to the two display windows are provided in order to display the image information of the traveling speed and the engine rotational speed together. Yes. For this reason, there is an inconvenience that the production cost increases as a result of an increase in the number of mounted parts of the motorcycle.

  The present invention has been made in consideration of the above problems, and provides a liquid crystal display device for a motorcycle that has a display specification for allowing a driver to immediately view information that the driver wants to know while traveling, and that reduces production costs. The purpose is to do.

A motorcycle liquid crystal display device according to claim 1 of the present invention is a motorcycle liquid crystal display device including a single liquid crystal panel, a first light source, and a second light source, The display area of the single liquid crystal panel is divided into at least a first display area and a second display area, and radiated light from the first light source is used as the first display area. The light emitted from the first liquid crystal panel is guided to the second display area, and the hollow area between the single liquid crystal panel and the first light source or the second light source is divided into two chambers. As described above, a light shielding member is provided between the first light source and the second light source, and the first light source and the second light source are arranged facing the normal direction of the single liquid crystal panel. that has been.

And in the area of the first display area is divided to be larger than the area of the second display area, an image showing a rate of at least the motorcycle in the first display area, the second Images indicating at least the engine speed of the motorcycle are displayed in the display area, and each of the first light source and the second light source is composed of at least one light emitting diode, The light emitting luminance of the light emitting diode constituting the light source is higher than the light emitting luminance of the light emitting diode constituting the first light source.

According to a second aspect of the invention, in the liquid crystal display device of a motorcycle according to claim 1 Symbol placement, emission wavelength spectrum of the second light source is characterized in that different from the emission wavelength spectrum of the first light source .

According to a third aspect of the present invention, in the motorcycle liquid crystal display device according to the first or second aspect , the second display area is disposed at a central portion of the display area of the single liquid crystal panel, and An image showing at least the engine speed of the motorcycle is displayed in the display area 2.

According to a fourth aspect of the present invention, in the motorcycle liquid crystal display device according to any one of the first to third aspects, a message display area is provided in the second display area.

According to a fifth aspect of the present invention, in the motorcycle liquid crystal display device according to the fourth aspect , the odometer is used as a message display unit.

According to a sixth aspect of the present invention, in the motorcycle liquid crystal display device according to the fourth aspect , the second display area is a bar graph representing the engine speed.

According to the first aspect of the present invention, two display areas are provided on a single liquid crystal panel, and the radiated light of the two types of light sources is guided to correspond to the divisions of the display areas. One liquid crystal panel can display an image based on different light sources. As a result, the number of mounted parts of the motorcycle is reduced. As a result, the production cost can be reduced while providing a display specification that allows the driver to immediately view information that the driver wants to know while traveling. Further, by providing a light shielding member between the two types of light sources, it is possible to prevent the radiated light from interfering with each other, and it is possible to prevent a decrease in display performance due to the generation of interference fringes.

Furthermore , high visibility is achieved by using inexpensive light emitting diodes as a light source in a wide area display area for displaying traveling speed and the like, and expensive light emitting diodes in a narrow area display area for displaying engine speed and the like. A selective device design can be made, such as using an expensive white high-intensity light-emitting diode only for displaying the required engine speed. And since a light-emitting diode is used instead of a cold cathode tube as a backlight, the production cost of the liquid crystal display device is reduced while having a display specification for allowing the driver to immediately recognize the engine speed that the driver wants to know while traveling. be able to.

According to the second aspect of the present invention, when light sources having different emission wavelength spectra are used, it is possible to prevent display performance from being degraded due to generation of interference fringes.

According to the third aspect of the present invention, the display image such as the engine speed is arranged in the central portion with respect to the entire display area, so that the driver always keeps the engine speed display normal (the display screen is substantially omitted). (Viewed so that the viewing angle is 0 °). Thus, the driver can visually follow the change in the image that occurs in real time without being affected by the viewing angle characteristics of the liquid crystal panel, and can recognize the engine speed.

According to the fourth aspect of the present invention, by providing the message display area in the display area, it is possible to display characters other than the numbers used for displaying the travel distance and travel speed, for example, English characters. Accordingly, the message display area can be used as an odometer / trip meter, and a message to that effect can be displayed when various events occur.

According to the fifth aspect of the present invention, a message with a large number of characters can be displayed on an odometer that requires a large number of digits. Thereby, an odometer and a message display area can be shared.

According to the invention described in claim 6 , the second display area can be displayed as a bar graph. Thereby, the driver | operator can visually recognize an engine speed immediately.

1 is a schematic side view of a motorcycle in which a liquid crystal display device according to an embodiment of the present invention is incorporated. FIG. 2 is a front view of a liquid crystal display device mounted on the motorcycle shown in FIG. 1. FIG. 3 is a partially omitted view of the front view of the liquid crystal display device shown in FIG. 2. It is sectional drawing which follows the IV-IV line of FIG. FIG. 3 is a rear view of the liquid crystal display device shown in FIG. 2. It is a figure which shows the modification of the display of the odometer of the liquid crystal display device shown in FIG.

  Hereinafter, preferred embodiments of a liquid crystal display device for a motorcycle according to the present invention will be described in detail with reference to the accompanying drawings.

  First, a motorcycle incorporating a liquid crystal display device according to the present invention will be described with reference to FIG. The motorcycle 10 includes a vehicle body frame 12, a cowl portion 14 provided on the vehicle body frame 12 and covering the vehicle body frame 12, a front wheel 16 that is a steering wheel, a rear wheel 18 that is a drive wheel, and a steering that steers the front wheel 16. The unit 20 includes a seat 22 on which an occupant sits, a fuel tank 24 positioned between the steering unit 20 and the seat 22, and a headlight unit 26 for irradiating the front.

  The vehicle body frame 12 is configured to be integrally joined by welding, for example, a plurality of types of steel materials. The vehicle body frame 12 is positioned below the main frame 34, a head pipe 32 provided in the steering unit 20 via the top bridge 28 and the bottom bridge 30, a main frame 34 extending rearward from the head pipe 32, and the main frame 34. A down tube 36 extending from the head pipe 32 to the rear of the vehicle body and a front frame 38 extending from the head pipe 32 to the front of the vehicle body are provided. A meter unit 40 is attached to the front frame 38 behind the headlight unit 26.

  The cowl portion 14 includes a front cowl 42 positioned at the front of the vehicle body, an under cowl 44 positioned at the lower side of the vehicle body, and a side cowl 46 positioned at the rear of the vehicle body.

  The steering unit 20 includes a pair of front forks 52 that pivotally support the front wheels 16 from the left-right direction of the vehicle body, and a handle portion 54 attached to the pair of front forks 52. Thereby, the front wheel 16 can be steered.

  Further, in the present embodiment, the motorcycle 10 includes a fender 56a positioned above the front wheel 16, a fender 56b positioned above the rear wheel 18, a cushion unit 58 that cushions vibration transmitted from the rear wheel 18 to the vehicle body frame 12, A window screen 60, a rearview mirror 62, a muffler 64, and a stand 66 are provided. Needless to say, an engine 68, a transmission 70, and an air cleaner 72 are disposed below the fuel tank 24 and surrounded by a front cowl 42, an under cowl 44, and a side cowl 46. Note that reference numeral 74 in the drawing indicates a seat frame 74.

  Next, the liquid crystal display device according to the present embodiment incorporated in the motorcycle 10 basically configured as described above will be described in more detail with reference to FIGS.

  2 is a front view of the meter unit 40 applied to the liquid crystal display device according to the present embodiment, FIG. 3 is a partially omitted view of the front view of the meter unit 40 shown in FIG. 2, and FIG. 4 is IV-IV in FIG. FIG. 5 is a rear view of the meter unit 40 shown in FIG. 2.

  As shown in FIG. 4, the first casing 100 is covered with a back cover 102 and integrated with bolts 104. The second casing 106 is fitted with the first casing 100, and the three are integrated by a bolt 108 that penetrates the first casing 100 from the back cover 102.

  The second casing 106 includes a hole 116, a hole 118, and a hole 120 for fitting the first lens 110, the large-diameter second lens 112, and the third lens 114, respectively. The first lens 110 is located at the center of the second casing 106, the second lens 112 is located below the center of the second casing 106, while the third lens 114 is above the center of the second casing 106. Is located.

  In order to improve the visibility of the driver, the first lens 110, the second lens 112, and the third lens 114 are made of a transparent acrylic resin, and an anti-fogging agent is applied to the inner surface thereof.

  An inner case 124 is disposed in a chamber 122 formed by the first casing 100 and the second casing 106, and the inner case 124 is held by a bolt 126 inserted from the first casing 100.

  The circuit board 128 is fixedly disposed so as to be integrated with the inner case 124 and the first casing 100. On the surface of the circuit board 128, a first light emitting diode 130, a second light emitting diode 132, and a third light emitting diode 134 having different emission wavelength spectra are fixed. As can be easily understood from FIG. 3, a plurality of the first light emitting diodes 130, the second light emitting diodes 132, and the third light emitting diodes 134 are disposed at predetermined positions with appropriate intervals.

  The liquid crystal panel 136 is supported by a spacer holder 140 that is coupled to the inner case 124 at both ends while being stacked on the upper surface of the diffusion plate 138.

  The inner case 124 preferably has a light shielding structure so that the first light emitting diode 130, the second light emitting diode 132, and the third light emitting diode 134 do not leak radiation. The first light-emitting diode 130, the second light-emitting diode 132, and the third light-emitting diode 134 are arranged so as to block the emitted light and prevent the light from interfering with each other.

  FIG. 3 is a diagram illustrating the positional relationship among the circuit board 128, the liquid crystal panel 136, the first light emitting diode 130, the second light emitting diode 132, and the third light emitting diode 134.

  On the surface of the circuit board 128, nine first light emitting diodes 130, three second light emitting diodes 132, and five third light emitting diodes 134 are fixed. It will be easily understood that the respective light emitting diodes 130, 132, and 134 are arranged at appropriate intervals so that the emitted light is not unevenly distributed.

  The display area of the liquid crystal panel 136 is divided into a first display area 144 (area lacking a semicircle from a rectangle) and a second display area 146 (area of the semicircle) by a rotating light shielding member 142. In the present embodiment, nine first light emitting diodes 130 are disposed in the area corresponding to the first display area 144 on the back surface of the liquid crystal panel 136, while the area corresponding to the second display area 146. Three second light emitting diodes 132 are disposed therein. Specifically, six first light emitting diodes 130 in the upper row and two first light emitting diodes 130 in the lower row are arranged in parallel in the vehicle width direction (left and right direction), and one first light emitting diode 130 is disposed above the upper row. Three second light-emitting diodes 132 are disposed on the circumference of the light-shielding member 142 that goes around.

  A third display region 147 is provided outside (upper part) of the display region of the liquid crystal panel 136, and five third light emitting diodes 134 are arranged in the vehicle width direction in the third display region 147. They are arranged side by side (in the left-right direction). The circuit board 128 performs ON / OFF control on each third light emitting diode 134 independently of the drive control of the liquid crystal panel 136.

  In this way, the emitted light from the first light emitting diode 130 is guided to the first display region 144, the emitted light from the second light emitting diode 132 is guided to the second display region 146, and further the third light emitting diode 134 Is emitted to the third display region 147.

  Next, the meter unit 40 will be described with reference to FIGS. Note that the image displayed on the meter unit 40 of the motorcycle 10 of the present embodiment includes not only alphanumeric characters that directly represent physical quantities such as traveling speed but also other characters, figures, diagrams, pictures, and the like. Needless to say, it is a broad concept.

  As shown in FIG. 2, a circular panel 75 is provided at a substantially central portion of the meter unit 40 that is curved in appearance so as to have five corners. A tachometer 76 for displaying the engine speed of the motorcycle 10 is provided on the upper half side of the circular panel 75 and along the circumference thereof. The scale 77 of the tachometer 76 is set in increments of 0.25 from 0.00 to 10.25, and the reading of the scale 77 is 1/1000 of the engine speed (rpm: the number of revolutions per minute) of the motorcycle 10. Corresponds to the value of. Thus, the tachometer 76 displays the engine speed of the motorcycle 10 in an analog manner as a bar graph within the range of 0 to 10250 rpm.

  Since the tachometer 76 is disposed at the substantially central portion of the meter unit 40, the driver can view the tachometer 76 as needed (viewed so that the viewing angle is approximately 0 ° with respect to the display screen). Thus, the driver can visually follow the change in the meter that occurs in real time without being affected by the viewing angle characteristics of the liquid crystal panel 136, and can recognize the engine speed.

  On the left side of the circular panel 75, a speedometer 78 for displaying the traveling speed (km / h) of the motorcycle 10 and a clock 80 for displaying the current time (am / pm, hour, minute) are provided. Yes.

  On the right side of the circular panel 75, an odometer 82 that displays the total travel distance (km) of the motorcycle 10 and a travel distance (km) of the motorcycle 10 are displayed, and the driver can arbitrarily reset by a reset button 84. A trip meter 86 is provided. The odometer 82 expresses arithmetic numbers in a 7-segment system for each digit, and can display numerical values up to six integers. The trip meter 86 expresses arithmetic numbers in a 7-segment system for each digit excluding the highest digit, and can display numerical values up to 4 digits in the integer part and 1 digit in the decimal part.

  On the upper side of the circular panel 75, a fuel gauge 88 for displaying the remaining fuel amount of the motorcycle 10 is provided above the circular panel 75 and along the circumference thereof. A plurality of lamps are juxtaposed between the empty amount (E) and the full amount (F) indicating the shortage of the remaining amount of fuel, thereby allowing the driver to easily grasp the remaining amount of fuel.

  On the upper side of the fuel gauge 88, a clock adjustment button 90, a turn signal indicator L92, an FI indicator 94, a neutral indicator 96, an upper beam indicator 98, a turn signal indicator R99, and a reset button 84 are provided.

  As described above, the first light-emitting diode 130 is provided on the back surface of the liquid crystal panel 136 in the display area (first display area 144) of the speedometer 78, the clock 80, the odometer 82, the trip meter 86, and the fuel gauge 88. Individually arranged. In addition, three second light emitting diodes 132 are disposed on the back surface of the liquid crystal panel 136 in the display area (second display area 146) of the tachometer 76. Furthermore, five third light emitting diodes 134 are arranged in the display area (third display area 147) of the turn signal indicator L92, FI indicator 94, neutral indicator 96, upper beam indicator 98, and turn signal indicator R99. .

  The area of the second display region 146 is divided so as to be smaller than the area of the first display region 144, and a second light emitting diode 132 having higher emission luminance than the first light emitting diode 130 is disposed. Thus, it becomes easier for the driver to visually recognize the display on the tachometer 76.

  On the other hand, by using a white light emitting diode, a green light emitting diode, or a blue light emitting diode as the second light emitting diode 132, it becomes easier to visually recognize the contrast of the ON / OFF display. In particular, the production cost of the meter unit 40 can be reduced if a high-luminance white light-emitting diode is used as a backlight instead of a cold-cathode tube during engine speed display that requires high visibility.

  Further, in the second display region 146, a white light emitting diode is used as the second light emitting diode 132 on the left side and the center side, and a red light emitting diode is used as the second light emitting diode 132 on the right side. It is preferable to display the high rotation range (red zone) with different colors. As a result, the driver can more easily identify the engine speed.

  Further, from the viewpoint of image quality, the turn signal indicator L92, the FI indicator 94, the neutral indicator 96, the upper beam indicator 98, the turn signal indicator R99 (in this embodiment, the first display region 147 need not use the liquid crystal panel 136). If an image is displayed in the third region 147) by ON / OFF control of the third light emitting diode 134, the arrangement area of the liquid crystal panel 136 can be reduced, and the production cost of the meter unit 40 can be reduced.

  FIG. 5 shows a rear view of the meter unit 40. A power supply terminal 148 for supplying power to the circuit board 128 is provided on the left side of the back cover 102. In addition, the back cover 102 is provided with a large number of ventilation holes 150 for discharging heat generated from the light emitting diodes or the like.

  As a modification, the display of the odometer 82 can be configured in a 14-segment system as shown in FIG. If comprised in this way, English characters etc. other than the numerical numbers used for the display of a travel distance and a travel speed can be expressed, and it can serve as a message display as well as an odometer / trip meter. For example, when the odometer 82 is composed of seven 14-segment systems, “HELLO” immediately after the driver turns on the engine, “GOODBYE” immediately after the engine is turned off, and the remaining amount of fuel is exhausted. By displaying “EMPTY” or the like on the screen, when various events occur, a message to that effect can be displayed to alert the driver.

  According to the meter unit 40 of the motorcycle 10 of the present embodiment, two display areas (a first display area 144 and a second display area 146) are provided on a single liquid crystal panel 136, and the display areas are divided into the display areas. By correspondingly guiding the radiated light of the two types of light sources (first light emitting diode 130 and second light emitting diode 132), image display based on different light sources can be performed with one liquid crystal panel. As a result, the number of mounted parts of the motorcycle is reduced. As a result, the production cost can be reduced while providing a display specification that allows the driver to immediately view information that the driver wants to know while traveling.

  Further, according to the meter unit 40 of the motorcycle 10 of the present embodiment, the first light emitting diode 130 having a low luminance is provided in the large area display area (first display area 144) for displaying the traveling speed and the like. By using the second light emitting diode 132 having high luminance as a light source in the narrow area display area (second display area 146) for displaying numbers and the like, only the tachometer 76 requiring high visibility is expensive. Selective device design such as using a white high-intensity light emitting diode can be made. And since a light-emitting diode is used instead of a cold cathode tube as a backlight, the production cost of the liquid crystal display device is reduced while having a display specification for allowing the driver to immediately recognize the engine speed that the driver wants to know while traveling. be able to.

  Further, according to the meter unit 40 of the motorcycle 10 of the present embodiment, the light shielding member 142 that circulates between the light sources (the first light emitting diode 130 and the second light emitting diode 132) having different emission wavelength spectra provides radiation. It is possible to prevent light from interfering with each other. Accordingly, it is possible to prevent the display performance from being deteriorated due to the generation of interference fringes and to make the appearance of the liquid crystal display device beautiful by utilizing the ring shape of the light shielding member.

  Further, according to the meter unit 40 of the motorcycle 10 of the present embodiment, the tachometer 76 is disposed at the center with respect to the entire display area of the meter unit 40, so that the driver can display the engine speed as necessary. It can be viewed normally (viewed so as to have a viewing angle of approximately 0 ° with respect to the display screen). Thus, the driver can visually follow the change in the image that occurs in real time without being affected by the viewing angle characteristics of the liquid crystal panel, and can recognize the engine speed.

  Further, according to the meter unit 40 of the motorcycle 10 of the present embodiment, by providing a message display area in the display area of the meter unit 40, characters other than arithmetic numbers used for displaying the travel distance and travel speed, for example, English characters can be displayed. Accordingly, the message display area can be used as an odometer / trip meter, and a message to that effect can be displayed when various events occur.

  Further, according to the meter unit 40 of the motorcycle 10 of the present embodiment, a message with a large number of characters can be displayed on the odometer 82 that requires a large number of digits. Thereby, an odometer and a message display area can be shared.

  Moreover, according to the meter unit 40 of the motorcycle 10 of the present embodiment, the second display area 146 can be displayed as a bar graph. Thereby, the driver | operator can visually recognize an engine speed immediately.

  It should be noted that the present invention is not limited to the above-described embodiment, and it is naturally possible to adopt various configurations without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Motorcycle 40 ... Meter unit 76 ... Tachometer 78 ... Speedometer 82 ... Odometer 86 ... Trip meter 88 ... Fuel gauge 100 ... 1st casing 102 ... Back cover 106 ... 2nd casing 110 ... 1st lens 112 ... 2nd lens 122 ... Chamber 124 ... Inner case 128 ... Circuit board 130 ... First light emitting diode 132 ... Second light emitting diode 136 ... Liquid crystal panel 142 ... Circulating light shielding member 144 ... First display area 146 ... Second display area

Claims (6)

In a liquid crystal display device (40) of a motorcycle (10) comprising a single liquid crystal panel (136), a first light source (130), and a second light source (132),
Dividing the display area of the single liquid crystal panel (136) into at least a first display area (144) and a second display area (146);
Radiated light from the first light source (130) is guided to the first display area (144), and emitted light from the second light source (132) is guided to the second display area (146). Let it light,
The first light source (the first light source (136) and the first light source (136) and the first light source (130) or the second light source (132) are divided into two chambers. 130) and the second light source (132), a light shielding member (142) is provided,
The first light source (130) and the second light source (132) are arranged facing the normal direction of the single liquid crystal panel (136) ,
The area of the first display area (144) is divided to be larger than the area of the second display area (146),
An image (78) showing at least the speed of the motorcycle (10) is displayed in the first display area (144), and an engine speed of at least the motorcycle (10) is shown in the second display area (146). Each image (76) is displayed,
Each of the first light source (130) and the second light source (132) is composed of at least one light emitting diode, and the light emission luminance of the light emitting diode constituting the second light source (132) is: A liquid crystal display device (40) for a motorcycle (10), wherein the light emission luminance of the light emitting diode constituting the first light source (130) is higher . The liquid crystal display device according to claim 1 Symbol placement of the motorcycle (10) (40),
The liquid crystal display device (40) of the motorcycle (10), wherein an emission wavelength spectrum of the second light source (132) is different from an emission wavelength spectrum of the first light source (130). In the liquid crystal display device (40) of the motorcycle (10) according to claim 1 or 2 ,
The second display area (146) is disposed at the center of the display area of the single liquid crystal panel (136),
The liquid crystal display device (40) of the motorcycle (10), wherein at least an image (76) indicating the engine speed of the motorcycle is displayed in the second display area (146). In the liquid crystal display device (40) of the motorcycle (10) according to any one of claims 1 to 3 ,
A liquid crystal display device (40) for a motorcycle (10), comprising a message display region in the second display region (146). In the liquid crystal display device (40) of the motorcycle (10) according to claim 4 ,
A liquid crystal display device (40) for a motorcycle (10), wherein the odometer (82) is a message display unit. In the liquid crystal display device (40) of the motorcycle (10) according to claim 4 ,
The liquid crystal display device (40) of the motorcycle (10), wherein the second display area (146) is a bar graph (76) representing the engine speed.

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