JPH04101526U - Warning display device for vehicle instruments - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to improve the safety of vehicles by improving the reliability of warning display devices on vehicle instruments. [Structure] A warning sheet 21a is formed by printing a mark indicating the content of a warning using a liquid crystal that changes color as the temperature rises. Warning sheet 2
Sheet-like heating elements 21b are arranged on the back surface corresponding to each mark 1a, etc. Then, the heating element 21b corresponding to the content of the warning to be warned is energized to display a warning.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a vehicle instrument that monitors the status of each part of the vehicle and displays a warning. The present invention relates to a warning display device.

0002

[Conventional technology]

Conventionally, as this type of warning display device, there is one shown in FIGS. 4 and 5. It was common. Figure 4 is a front view of the main parts of a vehicle instrument with a warning display device. , FIG. 5 is a cross-sectional view of the instrument of FIG.

0003 The vehicle instrument includes an indicator 1 such as a speedometer and a warning display device 2. However, in the illustrated example, the warning display device 2 is arranged below the indicator 1. The indicator 1 has a pointer 1a and drives the pointer 1a according to a measured quantity such as vehicle speed. The inner unit 1b consists of an inner unit 1b and a dial 1c that displays the measured amount together with the pointer 1a. is fixed to the bottom of the case 3, and the dial 1c is arranged at the opening of the case 3.

0004 Warning display device 2 indicates engine oil shortage, upper beam lighting and combustion. Equipped with a warning lens 2a for displaying warnings to warn of insufficient balance, etc. I can do it. This warning lens 2a is made of a transparent plate made of polycarbonate resin, etc. A simple pattern 2b that shows the above warning content by printing letters on the surface. In addition to forming a plurality of layers, for example, a printed layer 2c of an alarm color is formed on the back surface. There is. On the back side of the warning lens 2a, there are spaces at the positions corresponding to each warning display. A chamber 2d is formed, and a valve 2e is attached to this compartment 2d.

[0005] Therefore, when a warning condition is detected, the valve 2 corresponding to the warning content is activated. By lighting up the light from the bulb 2e, the light from the bulb 2e passes through the warning lens 2a and the alarm is activated. The notification content will now be displayed in warning color.

[0006] For this purpose, the valve 2e is mounted on a flexible printed wiring board arranged on the back side of the case 3. It is electrically connected to the board (FPC) 4. In addition, the warning lens 2a, the finger The dial 1c of the indicator 1 is masked by a cover 5 except for the necessary parts, and the dial 1c is The entire opening of the base 3 is covered with a front cover 6 made of a transparent resin material. It is.

[0007] With the above configuration, first, for example, the gasoline remaining amount sensor detects the amount of gasoline remaining. When it is detected that the remaining amount is less than a certain amount, the A voltage is applied to the bulb 2e, the bulb 2e is turned on, and a warning light appears in the red background. A pattern 2b that indicates the amount of fuel remaining in the engine lens 2a appears in relief.

[0008]

[Problem that the idea aims to solve]

However, the conventional warning display device described above does not display a warning. Since the transmitted light of bulb 2e, which has a relatively short life, is used to If the bulb ran out, a warning could no longer be displayed, which caused problems in terms of reliability.

[0009] In addition, if the bulb burns out, do not use the vehicle until the bulb 2e is replaced. This is inconvenient because the driver will not be able to do so, and if the driver notices that the ball is out, If not, there is a problem that it is not favorable for safe driving.

0010 Therefore, in view of the above-mentioned conventional problems, the present invention is designed to display a warning when a warning should be displayed. This is a vehicle meter that improves reliability and safety by eliminating the possibility of failure. Our objective is to provide a warning display device for equipment.

[0011]

[Means to solve the problem]

In order to solve the above problems, the warning display device developed by the present invention is Warning display for vehicle instruments that monitors the status of each part of the vehicle and displays a warning A mark on a device that indicates a warning using a liquid crystal display that changes color as the temperature rises. A warning sheet formed by printing, etc., and each map of the warning sheet. It is equipped with a sheet-like heating element stacked on the back in response to A warning is displayed by energizing the heating element that corresponds to a mark, etc. indicating the content of the warning. It is characterized by

0012

[Effect]

With the above configuration, the warning content is displayed using a liquid crystal display that changes color as the temperature rises. The back side corresponds to each mark etc. of the warning sheet formed by printing. Sheet-like heating elements are stacked on top of each other to correspond to marks indicating warning contents. The warning sheet is heated by energizing the heating element, so the mark As the temperature rises, the liquid crystal displaying the images changes color, and this discoloration causes a warning to be displayed. will be held.

[0013]

【Example】

Hereinafter, embodiments of the present invention will be described based on the drawings. Figure 1 shows the Warning of this invention. installed in a vehicle instrument configured as a combination meter with a FIG. 3 is a cross-sectional view showing a soldered state. In the figure, parts that are the same as before are given the same symbols and explained. omitted.

[0014] In the figure, a warning display device 21 placed below the indicator 1 is a A liquid crystal display that changes color as the temperature rises indicates engine oil shortage and upper beam failure. A watch with multiple printed marks indicating warnings such as lighting and low fuel level. This warning sheet 21a corresponds to each mark, etc. on this warning sheet 21a. and a sheet-like heating element 21b disposed overlappingly on the back surface.

[0015] When creating the above warning sheet 21a, it is usually black in color, but the temperature For example, liquid crystal printing manufactured by Kagawa Printing Co., Ltd. (Chameleon Printing) changes color as it rises. Kid Crystal) can be used.

[0016] The heat generating sheet 21b is a sheet-shaped heat generating body as shown in FIG. , a nichrome wire 211b insulated with a sheet 212b is used. In addition, this The heat generating sheet 21b is provided corresponding to each mark, and is selectively heated through the FPC4. When energized, it generates heat, heating the opposing marks and causing them to change color.

[0017] Next, a diagram of the circuit configuration of the control device of the warning display device 21 of this embodiment is shown. This will be explained using 3. In the figure, 22 is according to a pre-stored control program. It is a CPU that operates, and the input port of this CPU22 has a function that detects the remaining amount of gasoline. A fuel sensor 23 that outputs fuel, an engine oil sensor that detects the remaining amount of engine oil A plurality of sensors such as 24 are connected. In addition, the output port of the CPU 22 is The switch element 25 connected in series with the heat generating sheet 21b corresponding to the sensor is turned on. Turn on/off. When the switch element 25 turns on, the battery 26 emits electricity. A current flows through the heat sheet 21b and the switch element 25, and the heat generating sheet 21b begins to generate a fever.

[0018] The warning display device 21 having the above configuration is first configured by the CPU 22 to The signals from the fuel sensor 23, engine oil sensor 24, etc. are monitored, and the gasoline , detects that the remaining amount of engine oil is less than a certain amount, and Depending on the result, the switch element 25 is turned on and power is supplied from the battery 26 via the FPC 4. The current is directed to the heat generating sheet 21b.

[0019] Due to this energization, the nichrome wire 211b of the heat generating sheet 21b generates heat and generates a certain amount of heat. It begins to emit heat with a calorific value. This heat is transferred to the warning sheet 21a. Instead, the warning sheet 21a is heated to a predetermined temperature. By this heating, The warning sheet 21a with liquid crystal printing is colored from black to the color corresponding to the above temperature. The color changes. This discolored color indicates low fuel level, engine oil shortage, etc. can.

[0020] In addition to the above-mentioned low fuel and engine oil shortages, the upper beam is lit, Warnings can also be displayed for door opening, handbrake, low battery voltage, etc. can.

[0021] In addition, marks indicating multiple warning contents are formed on one warning sheet 21a. Instead, one mark is formed on one warning sheet 21a. It is also possible to arrange multiple.

[0022] Furthermore, the value of the current flowing from the CPU 22 is set in several stages depending on the remaining amount. , and can also be printed with liquid crystals that change colors depending on the temperature. The warning display can also be displayed in multiple ways.

[0023]

[Effect of the idea]

As described above, in the warning display device according to the present invention, the heat generating sheet and the temperature Warning sheet with liquid crystal printing that changes color as the vehicle rises The warning display is made so that the warning display can be performed without using a valve. Therefore, the warning display can be performed reliably without causing the valve to burn out. This has the effect of improving reliability and safety.

[0024] Also, by not using a valve, the dedicated space is smaller, so It also has the effect of increasing the degree of freedom in the design and layout of the combination meter. It will be done.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a combination meter having a warning display device for a vehicle meter according to the present embodiment.

FIG. 2 is a front view of a heat generating sheet that constitutes the warning display device of FIG. 1;

FIG. 3 is a circuit configuration diagram of a control device of the warning display device of FIG. 1;

FIG. 4 is a front view of a combination meter having a conventional warning display device.

FIG. 5 is a sectional view of the combination meter of FIG. 4;

[Explanation of symbols]

1 Indicator 21 Warning display device 21a Warning sheet 21b Sheet-shaped heating element

Claims (1)

[Scope of utility model registration request] Claim 1: A warning display device for a vehicle instrument that monitors the condition of each part of a vehicle and displays a warning, comprising: a warning sheet in which a mark indicating the content of the warning is formed by printing on a liquid crystal display that changes color as the temperature rises; , a sheet-shaped heating element arranged on the back surface corresponding to each mark, etc. of the warning sheet, and a warning display is performed by energizing the heating element corresponding to the content of the warning to be issued. Warning display device for vehicle instruments.