JPS60176095A - On-board display unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention is an in-vehicle display device that displays the status of each device installed in an automobile, and which displays various information on a single screen.
The present invention relates to a display device that displays images in chronological order or in a time-division manner.

Such a display device can be installed in an automobile's instrument panel and a pad portion of a steering wheel, and can display various numerical information, alarm information, and the like.

[Prior art]

Conventionally, in the display device G provided on the instrument panel of an automobile, one display screen is provided for one display item. These display screens may be segment-type displays that display numerical values or bar graphs, or they may be translucent panels that are printed with various patterns corresponding to alarm information, and light is emitted from the back onto a screen that displays a specific pattern. This is a display device that displays pictures by irradiating light. For this reason, a large number of output screens are required to output automobile warning information. Further, since various warning information is displayed discretely over a wide range, there is a drawback that it is difficult for the driver to see.

[Purpose of the invention]

Therefore, the present invention has been made to improve these conventional drawbacks, and uses a single dot matrix type display element to form various types of information in dot patterns and display them in chronological order as necessary. It is an object of the present invention to provide a display device that displays alarm information, etc., or time-divisionally, thereby making it easier to see alarm information, etc. output from each device of an automobile.

[Structure of the invention]

That is, the present invention includes a dot matrix type display element, a pattern generator that generates a predetermined pattern on the dot matrix type display element according to a control signal, and a status signal indicating the status of each device of the automobile. According to a predetermined priority order, the status signal kites 1. The present invention relates to an on-vehicle display device comprising: a control device that outputs a control signal to the pattern generator to perform a corresponding display.

The dot matrix type display element used here is E
Various types of displays such as L displays, liquid crystal displays, light emitting diode displays, and fluorescent display tubes can be used. As mentioned in the particularly desirable embodiment section, this display element includes a transmissive liquid crystal element plate that can electrically control the light transmittance for each tod, and a light source for the liquid crystal element plate that emits light of different wavelengths. It can also be realized by combining a plurality of light emitting diode chips as one set with a variable color light emitting body formed by disposing a large number of such sets of light emitting diode chips on a metal substrate and molding them. In the case of this element, by selecting the light emitting diode chips that emit light and controlling the magnitude of the current supplied to them, the emitted light color can be changed discretely or continuously from 1lil lll-! Therefore, the display color of the display screen of this display device can be changed in accordance with the transition of each piece of information. For example, when displaying a warning for engine oil pressure, washer fluid level, etc., the color of the emitted light can be changed from yellow to red depending on the level of the warning. You can get more detailed information.

In order to drive a dot matrix type display element, a pattern generator is required which stores a predetermined display dot pattern and drives the dot matrix type display element based on this stored information. The pattern generator outputs voltage signals that form various selected dot patterns based on control signals from a control device, which will be described later. Control i
The ll device detects various states of each device installed in the automobile, inputs a plurality of state signals indicating these states,
It has a function of outputting a control signal to a pattern generator for forming a display pattern corresponding to an input state signal on a dot matrix type display element based on a predetermined priority order. When a status signal with a high priority is input, this control device processes an interrupt and performs a display corresponding to the status signal with a high priority.

For example, the alarm signals of various devices can be panned and prioritized so that the alarms are displayed in order from the one with the highest priority.

Therefore, in the event of a situation that requires the most urgent response,
You can give the highest priority to handling.

Also, if the display with the lowest priority is set to display a physical quantity that changes over time, such as the booster pressure of a turbo, then if no status signal with a higher priority is input, Physical quantities that change over time can be displayed in a bar graph or the like.

When a high-priority status signal is input while outputting such temporally continuous information, the screen can be switched to a display corresponding to that status signal and a warning can be given to the driver. . Furthermore, if a status signal with a higher priority is input while a display corresponding to the alarm is being displayed, a display corresponding to that signal is displayed. In this way, the messages can be displayed to the driver in order of urgency.

In addition, the display of items other than the lowest priority level may be changed in a time-division manner to sequentially display phrases for a certain period of time for those to which the status signal has been input.

The present invention will be described below based on specific examples.

〔Example〕

FIG. 1 is a cross-sectional view showing the structure of a dot matrix display element used in a display device according to a specific embodiment of the present invention, and FIG. FIG. 2 is a partially see-through perspective view showing the configuration of a variable color light emitting body disposed inside. A variable color light emitter 50 is disposed on the printed circuit board 6o via lead pins 14. A liquid crystal element plate 70 is arranged in steps C on the upper surface of the variable color light emitting element 50. This liquid crystal element plate 7o is electrically connected to the printed circuit board 6° by a rubber connector 75 formed by forming thin conductive rubber wiring in non-conductive rubber. Further, the liquid crystal element plate 7o is fixed to a fixing base 76 by screws 77 using a restraining plate 74. The liquid crystal element plate 70 uses a TN type liquid crystal, and is a dot matrix type in which a glass substrate on which tanzaku-shaped transparent electrodes are formed is arranged so that the electrodes form a 90 degree angle with each other. This is a liquid crystal element plate. Further, this liquid crystal element plate 70 has an analyzer 71 and a polarizer 72 on both end faces.

Since their polarization direction is set to 4, when a voltage is applied between the electrodes corresponding to each driver, this liquid crystal element plate 70 can transmit light and emit variable color light. The light emitted from the body 50 is transmitted, and a display is performed depending on the color of the emitted light, corresponding to the pattern of the electrodes to which voltage is applied.Also, since the parts to which no voltage is applied are made of TN liquid crystal, The light linearly polarized by the polarizer 72 has its phase rotated by 90 degrees, and the analyzer 71 is stacked in front of it.
It becomes dark because it cannot be passed through. That is, positive type display is possible with this liquid crystal element. However, if the phase difference between the analyzer and polarizer is set to 90 degrees, negative type display is also possible.

FIG. 2 is a partially see-through perspective view showing the structure of a variable color light emitter 50 whose emission color can be controlled by applying a voltage. The lead frame 10 has lands 12 on which each light emitting diode is arranged and connects their electrodes, and externally
It has a lead bin 14 for supplying current to those light emitting diodes. On the land 12, light emitting diodes 20a, 120b, 20c, 21a, 2
1b, 21C, etc. are arranged. Here, the light emitting diodes 20a and 218 are green light emitting diodes, the light emitting diodes 20b and 21b are yellow light emitting diodes, and the light emitting diode 20C121C is a red light emitting diode. Six chips of these light emitting diodes are arranged on each land.

Further, in front of the lead frame 10, a glue deflector 32 is provided which serves as a frame for reinforcement and reflects the light emitted by each light emitting diode forward.

This reflector 32 is made of polybutylene terephthalate resin.

Further, the space formed by the reflector 32 is filled with an epoxy resin mixed with a scattering agent fused silicon, which encloses a light emitting diode and a lead frame, thereby forming a diffusion W#31. Further, the cathode of each light emitting diode is die-bonded to a land, and the anode thereof is bonded to another land using a wire A7 wire. The variable color light emitter 50 has the above configuration.

The reflector 32 has a container shape with an internal space, and serves to hermetically seal the interior from the outside, as well as to improve the mechanical strength of the interior. Reflector 32
In addition, epoxy resin, acrylic resin, polyester resin, nylon resin, polystyrene resin, polycarbonate resin, polypropylene resin, etc. can be used. However, the shape and material of the reflector 32 are not particularly limited. The above-mentioned diffusion layer 31 may be made of any light-transmitting plastic mixed with a scattering agent, synthetic silica, calcium carbonate, etc. in order to scatter light. The diffusion layer 31 can be formed by potting 1-poxy resin, acrylic resin, unsaturated polyester resin, urethane resin, etc. into the internal chamber formed by the reflector 32.

FIG. 3 is an electrical circuit diagram showing the overall configuration of the device of this embodiment. FIG. 4 is a flowchart showing the processing of the microcomputer used in the apparatus of this embodiment.

Reference numeral 80 denotes an oscillation circuit, and a oscillation signal output from the oscillation circuit is counted by a counter 82. The output signal of counter 82 is input to the lower address input terminal of memory 84.86. Memories 84 and 86 store data for generating a tod display pattern on the liquid crystal element plate 70. In addition, the upper address lines of the memory 84 and 86 are connected to a one-deep microcomputer (hereinafter simply referred to as a computer).
A control signal is input to select the display pattern output from the 0 port of the device. Further, the output of the counter 82 is input to a decoder 88, and the output of the decoder 88 is input to the horizontal electrodes of the liquid crystal element plate 70, respectively. Various relays and switches are connected to the output boat of the computer 90 as shown in the figure, and the output thereof is input to the input boat. These relays are for detecting the alarm of each sacred treasure, for example, the alarm of the door.
This is a relay switch that detects oil pressure, air pressure of tie A7, radiator temperature, liquid level, etc., and operates when these drop or rise above a certain level. For example, when the voltage at the status signal input terminal 92a decreases with respect to the reference voltage, the output of the comparator 92 goes high, the transistor 93 is activated, and the relay R1 is turned on. As a result, the status signal can be input to the computer 90 without displaying an alarm. Further, a turbo booster pressure detection signal is input to an analog input port of the computer 90.

Next, the operation of the device of this embodiment will be explained.

The addresses of the memories 84 and 86 are selected by a control signal outputted from the computer 90, and the pattern display data numbers stored in the addresses are sequentially updated by the counter 82 with that address as the first address, and the pattern display data numbers stored in the addresses are sequentially updated by the counter 82. Apply manual force to each vertical electrode. On the other hand, the output signal of the counter 82 is input manually to the decoder 88, and the output signal is input to the horizontal electrode, so the decoder 88
The output signal provides a scanning signal for selecting the horizontal electrodes of the liquid crystal element plate.

In this way, the 1-byte data for each horizontal electrode of the display pattern stored at the address specified by the computer 90 is sequentially output in synchronization with the scanning signal applied to the horizontal electrodes, and the liquid crystal element plate 70 receives a predetermined number of data. A display is made.

Next, the processing flow of the combination coater will be explained.

The computer begins processing at step 100.

That is, in order to read signals from various alarm relays, switches, etc., a scanning signal is output from the K output port, and the signal is input to the input port and input as various status signals. Hereinafter, this type of status signal input from the K input boat will be referred to as an alarm signal. In step 10"4, it is determined whether or not there is an alarm signal. If there is no alarm signal, the K input port will respond to all three scanning signals of 011.101.110 (positive logic). Also, if there is alarm No. 15, some signal line will be low level in response to any scanning signal, and depending on the type of scanning signal and which signal line is low level. The alarm signal h) can be determined depending on whether the alarm signal h) is in the
If it is a signal, the first alarm pattern is output to the liquid crystal element plate 70 in step 108. Then, the process returns to step 100 and similarly scans the alarm relay to input the alarm signal. The driver looks at the output of this 1st W report pattern and
Check the status of the device indicated by it and perform the corresponding processing. As a result of the processing, if the fault has been repaired, the manual input of the first alarm signal is canceled and the display of the first alarm pattern disappears. Furthermore, if the fault cannot be recovered at this point, by inputting a reset signal from the reset switch 98 in step 107, processing of the next priority alarm signal can be carried out.

Thereafter, up to the n-th Wf@1 signal is similarly determined, and a corresponding display is performed. In step 122, when all alarm signals have been checked and no 'f# alarm signal is input, the lowest priority data is input, a display corresponding to this data is displayed, and the screen is blanked.

In this embodiment, the booster pressure of the turbo is input as an analog signal from the analog port A of the computer 90, and the
After D conversion and signal processing, the signal is displayed on the liquid crystal display board 70 as a bar graph. Therefore, if no alarm signal is input, the driver can know the temporal fluctuations in the booster pressure of the turbo as a background.

In the above embodiment, when a fault is not recovered, a reset signal is input to display a display corresponding to the next priority alarm signal. The process may be performed repeatedly in parts.

[Effects of the Invention] In short, the present invention is a device that uses one dot matrix type display element and displays various information on this display element in a time-series or time-division manner.

Therefore, according to the device of the present invention, since the screen can be made single and narrow, it is possible to attach it to the pad portion of a steering wheel, for example. Furthermore, since the display range is narrow, it has the effect of making it easier for the driver to understand. Furthermore, when there is no alarm signal, a constant background display that changes over time is displayed, and when an alarm signal is input, the alarm display is performed, which improves display efficiency. At the same time, since the alarms are displayed sequentially on the same screen, the presence or absence of all alarms can be recognized at once, and therefore no alarms are overlooked.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing the structure of a dot matrix display element used in a vehicle-mounted display device according to a specific embodiment of the present invention, and FIG. 5 is a partially transparent perspective view showing the structure of the light emitting body. FIG. 3 is an electric circuit diagram showing the overall structure of the device of the embodiment, and the fourth factor is Flowchart 1 to explain the processing of the one-chip microcomputer. 50... Variable color light emitter 70... Liquid crystal element plate 80.
...Oscillator 82...Counter 84.86...Memory 88...Decoder □90...One-chip microcomputer R1...Relay 98...Reset switch Patent applicant Toyoda Gosei Co., Ltd. agent Patent attorney Professional: Hirotoshi Okawa Patent Attorney: Shudo Fujitani Patent Attorney: Akio Maruyama Figure 1 Figure 2

Claims (2)

[Claims] (1) A dot matrix type display element, a pattern generator that generates a predetermined pattern on the dot matrix type display element according to a control signal, and a status signal indicating the status of each device of the automobile as input, and the status signal output An in-vehicle display device comprising: a control device that outputs a control signal to the pattern generator for displaying a display corresponding to the status signal according to a predetermined priority order. (2) The dot matrix type display element includes a transmissive liquid crystal element plate that electrically controls the light transmittance of each dot, and a plurality of light emitting elements with different wavelengths provided on the back of the liquid crystal element plate. A vehicle-mounted display according to claim 1, characterized in that a large number of sets of light emitting diode chips are disposed substantially evenly on a substrate, and a molded variable color light emitting body is formed. Device.