JP2009174944A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device capable of reducing costs in a display device for displaying a plurality of segment display sections using bars. <P>SOLUTION: The display device for displaying the remaining amount of fuel (amount of measurement) using bars has a bar graph display section 9 comprising a first segment display group 10 where a plurality of first segment display sections 10A are arranged in a row and a second segment display group 11 where a plurality of second segment display sections 11A having display width in a row direction different from that of the first segment display sections 10A are arranged, and a microcomputer (control means) for controlling the first and second segment display groups 10, 11 according to the remaining amount of fuel. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a display device that displays, for example, a remaining amount of fuel in a vehicle.

For example, in a display device for a vehicle, there is known a device that displays a bar for the remaining amount of fuel, the temperature of cooling water, and the like. In the display device disclosed in Patent Document 1, a plurality of segment electrodes 13 are provided at equal intervals on a liquid crystal display panel to form an engine speed display section 4, a fuel remaining amount and temperature display section 5, and this is displayed in a bar graph. The point to do is shown. The electrical connection between the circuit board 9 disposed behind the liquid crystal display panel and mounted with electronic components for driving the liquid crystal display panel and the liquid crystal display panel is shown in FIG. As shown, the conductive rubber 11 is used. Alternatively, as shown in Patent Document 2, metal lead pins 6 are used.
Japanese Utility Model Publication No. 2-62514 Japanese Utility Model Publication No. 62-195122

  However, in the display device as described above, as the number of display portions (segment display portions) increases, the number of segment electrodes increases, requiring a space for routing the segment electrodes, and the liquid crystal display panel may be enlarged. It leads to cost increase. In addition, the conductive rubber for electrically connecting the liquid crystal display panel and the circuit board is increased, resulting in an increase in cost. Further, even when lead pins (connection terminals) are used, the number of lead pins that require space increases, which may increase the cost of the liquid crystal display panel and the case for holding the liquid crystal display panel. In addition, the number of man-hours for assembling the lead pins to the liquid crystal display panel or circuit board increases.

  The present invention has been made in view of these points, and an object of the present invention is to provide a display device capable of reducing costs in a display device that displays a plurality of segment display units in a bar display.

  In order to achieve the above object, the present invention is a display device that displays a measured amount in a bar, and includes a first segment display group in which a plurality of first segment display portions are arranged in a row, and the first segment display. A bar graph display unit including a second segment display group in which a plurality of second segment display units having different display widths in the column direction than the unit are arranged, and the first segment display group according to the measurement amount and And a control means for controlling the second segment display group.

  The first segment display group and the second segment display group display the remaining fuel amount, water temperature, and engine speed of the vehicle.

  Further, the first segment display section and the second segment display section are electrically connected to a circuit board on which the control means is mounted via a metal connection terminal or conductive rubber. .

  In a display device that displays a plurality of segment display portions as bars, a display device capable of reducing costs can be obtained.

  FIG. 1 is a partial cross-sectional view of a display device showing an embodiment of the present invention. FIG. 2 is an explanatory diagram showing a display form in the display device. In the present embodiment, the display panel displayed as a bar will be described as a liquid crystal display panel.

  The display device includes a liquid crystal display panel 1, a diffusion plate 2 disposed on the back side of the liquid crystal display panel 1, a holder 3 that holds the liquid crystal display panel 1 and the diffusion plate 2, and a rear of the holder 3. A hard circuit board 6 on which a light emitting diode 4 as a light source for illuminating the liquid crystal display panel 1 and the diffusing plate 2 from behind, a microcomputer 5 (control means) for driving the liquid crystal display panel 1 and the like are mounted, and the liquid crystal display panel 1 And a front panel 8 having an opening 8A that is disposed on the front side of the liquid crystal display panel 1 and defines a visible region of the liquid crystal display panel 1.

  The liquid crystal display panel 1 has a front glass substrate 1A on which a transparent electrode (so-called segment electrode) made of ITO is formed and a transparent electrode (so-called common electrode) as well known, although details are omitted (not shown). Liquid crystal molecules are sealed between the rear glass substrate 1B and the glass substrate 1A, 1B, for example, is pasted with a dark-colored polarizing film. When a signal (voltage) corresponding to the external measurement amount is applied to each transparent electrode through the electrode routed to the end portion 1B1 of the rear glass substrate 1B, the measured fuel amount of the vehicle, for example, is reduced. It is displayed.

  More specifically, the liquid crystal display panel 1 has a bar graph display unit 9 for displaying the remaining fuel amount in a bar. The bar graph display unit 9 includes a first segment display group 10 in which a plurality of first segment display units 10A are arranged in a row, and a second display width wider than the first segment display unit 10A in the column direction. It consists of a second segment display group 11 in which a plurality of segment display portions 11A are arranged, and a plurality of segment electrodes are formed in a line to form first and second segment display portions 10A, 11A. .

  In the present embodiment, as shown in FIG. 2, the first segment display section 10A is divided into six parts by dividing the remaining fuel amount from the EMPTY point P1 (hereinafter referred to as point E) to the intermediate point P2. The first segment display group 10 is provided. Further, the intermediate point P2 and the FULL point P3 (hereinafter referred to as F point) are divided into three equal parts, so that three second segment display parts 11A are provided to form the second segment display group 11 (the first segment display group 11). The display width in the column direction of the segment display portion 10A and the second segment display portion 11A is different, and the second segment display portion 11A is wider). That is, when displaying the remaining amount of fuel, the region from point E1 to point P2 that is important for the vehicle driver is displayed in a finely divided manner, and point F2 to point F2 that is not important compared to the point E1 side. The area up to P3 is displayed in a largely divided manner.

  In the liquid crystal display panel 1 according to the present embodiment, in addition to the bar graph display unit 9, a character display unit 12 composed of E and F displayed by forming segment electrodes, and a bar graph display unit 9 A mark display unit 13 is provided to mark the positions of the E point P1, the intermediate point P2, and the F point P3, and the character display unit 12 and the mark display unit 13 are always displayed at the same time. ing.

  The connection terminal 7 is made of metal (phosphor bronze, stainless steel, copper alloy, etc.) and has a sandwiching portion 7A and a lead portion 7B having a substantially U-shaped cross section. The sandwiching portion 7A is sandwiched between the end portions 1B1 of the rear substrate 1B of the liquid crystal display panel 1, and is electrically connected to the routing electrodes routed from the segment electrodes and the common electrode. Further, the lower end of the lead portion 7B is soldered to the circuit board 6. In the present embodiment, the connection terminals 7 include ten segments connected to the segment electrodes serving as the first segment display section 10A, the second segment display section 11A, the character display section 12, and the mark display section 13, and all of them. A total of 11 lines connected to the common electrode common to the display unit are fixed to the rear substrate 1B of the liquid crystal display panel 1.

  The holder 3 is made of, for example, a white synthetic resin, and has a penetration length through which the diffusing plate 2 and the mounting portion 3A on which the peripheral edges of the liquid crystal display panel 1 are mounted, the peripheral wall 3B, and the connection terminals 7 of the liquid crystal display panel 1 are inserted. It has a hole 3C and the like. The holder 3 is hooked or screwed to the circuit board 6.

  The diffusing plate 2 is fine so that light from the light emitting diodes 4 uniformly illuminates the liquid crystal display panel 1 on both surfaces or any one surface of a sheet material made of polycarbonate resin which is a colorless and transparent synthetic resin, for example. Although it has been printed with unevenness (texture) and light control, a milky white material having transparency may be used. Note that the diffuser plate 2 may be omitted if satisfactory illumination is obtained.

  As described above, the circuit board 6 is provided with the light emitting diode 4 and the microcomputer 5 (control means). Further, a through hole 6A is provided at a position corresponding to the lead portion 7B of the connection terminal 7, and the lower end side of the lead portion 7B inserted through the through long hole 3C of the holder 3 is inserted into the through hole 6A and soldered. Are electrically connected to the microcomputer 5 and the like.

  In the display device configured as described above, by applying a voltage to the segment electrode and the common electrode corresponding to the remaining amount of fuel that is a measurement amount, the corresponding first and second segment display portions 10A and 11A are displayed. The light enters the transmissive state, for example, receives light from the light emitting diode 4 that emits white light, and is transmitted and illuminated in white. Further, as described above, the character display unit 12 and the mark display unit 13 are always displayed at the same time, and similarly receive the light of the light emitting diode 4 that emits white light, and are transmitted and illuminated in white. It should be noted that light from the light-emitting diode 4 does not pass through the nine portions of the bar graph display portion corresponding to the segment electrodes that are not selected (no voltage is applied) and the background portions other than the character display portion 12 and the mark display portion 13. It has become.

  In this way, the display device displays the remaining fuel amount in a bar, and includes a first segment display group 10 in which six first segment display portions 10A are arranged in a row, and a first segment display portion 10A. A bar graph display unit 9 including a second segment display group 11 provided with three second segment display units 11A having a wide display width in the column direction, and a first segment display group 10 according to the fuel remaining amount In addition, since the display device includes the microcomputer 5 that controls the second segment display group 11, the number of segment electrodes is reduced as compared with the case where the entire bar graph display unit 9 is divided into equal parts. The space for drawing the electrodes is small, and the liquid crystal display panel 1 can be prevented from becoming large. In addition, the number of connection electrodes that connect the segment electrodes serving as the first and second segment display portions 10A and 11A and the microcomputer 5 is reduced, and the cost can be reduced.

  The first segment display group 10 and the second segment display group 11 display the remaining amount of fuel in the vehicle, and are effective in reducing the cost as a display device for the vehicle.

  In the display device in which the first segment display unit 10A and the second segment display unit 11A are electrically connected to the circuit board 6 on which the microcomputer 5 is mounted via the connection terminal 7, the connection terminal The number of 7 is small, and the liquid crystal display panel 1 and the holder 3 do not need to be enlarged. Further, the number of steps for assembling the connection terminal 7 to the liquid crystal display panel 1 and the circuit board 6 can be reduced, and the cost can be reduced.

  In the present embodiment, the target of the measurement amount is the one that displays the remaining amount of fuel in the vehicle, but it may be one that displays the temperature of the cooling water of the vehicle or the engine speed. Even in this case, as in the case of a display device that displays the remaining amount of fuel in a bar, it is possible to reduce costs by subdividing a region that is regarded as important or a region that is frequently used and dividing other regions roughly.

  Further, although the liquid crystal display panel 1 and the circuit board 6 are electrically connected using the connection terminals 7, conductive rubber or FPC as described in the background art may be used. Even in such a case, by reducing the number of segment electrodes, the conductive rubber or FPC can be made smaller (narrower), and the cost can be reduced.

  In addition, the first and second segment display portions 10A and 11A are transmissive and the background portion other than the display portion is a non-transparent so-called negative display type, but the display portion is non-transparent and the background portion is transmissive. A so-called positive display type may be used. Moreover, although it was set as the display panel which consists of the liquid crystal display panel 1, it is good also as a display panel using segment type organic EL and a fluorescent display tube.

1 is a partial cross-sectional view of a display device showing an embodiment of the present invention. Explanatory drawing which shows the display form in a display apparatus.

Explanation of symbols

1 Liquid crystal display panel (display panel)
3 Holder 5 Microcomputer (control means)
6 Circuit board 7 Connection terminal 9 Bar graph display unit 10 First segment display group 10A First segment display unit 11 Second segment display group 11A Second segment display unit

Claims (3)

  A display device that displays a measured amount in a bar, and a display width in the column direction is different from that of the first segment display group in which a plurality of first segment display units are arranged in a row, and the first segment display unit. A bar graph display unit including a second segment display group in which a plurality of second segment display units are arranged, and the first segment display group and the second segment display group are controlled according to the measurement amount. And a control means.   2. The display device according to claim 1, wherein the first segment display group and the second segment display group display a fuel remaining amount, a water temperature, and an engine speed of a vehicle.   The first segment display section and the second segment display section are electrically connected to a circuit board on which the control means is mounted via a metal connection terminal or conductive rubber. The display device according to claim 1.

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