Parking time display device

Abstract

A parking time display device comprising a motion displacement sensor, a control chip, and a statically driven liquid crystal display screen, characterized in that the output terminal of the motion displacement sensor is connected to a corresponding input terminal of the control chip, a corresponding output terminal of the control chip being connected to the input terminal in the liquid crystal display screen, the control chip being configured to read out a signal output from the motion displacement sensor to judge whether the vehicle stops moving and then to output a control signal to the liquid crystal display screen to indicate the time at which the vehicle stops moving.

Description

TECHNICAL FIELDThe present invention relates to an apparatus for recording and displaying a parking time after parking a vehicle.PRIOR ARTAn electronic parking time indicator is a device used to indicate when a vehicle is parked in a particular area, usually to meet the local parking regulations. Existing electronic parking time display devices normally include components such as motion displacement sensors, control chips, and liquid crystal display screens, and the battery is used as a power supply. Motion displacement sensors are used to detect the state of the vehicle. The vibrations generated when the vehicle is driven are transmitted to the motion displacement sensor and corresponding data are generated therefrom. By analyzing the data outputted from the motion displacement sensor, it is judged whether the vehicle is in a running state or a parking state. The control chip is used to judge the state of the vehicle by reading the data of the motion displacement sensor: when the vehicle is in a parking state, the parking time is displayed on the liquid crystal display screen; when the vehicle is restarted, the control chip is used to judge by reading the data of the motion displacement sensor that the vehicle is no longer in a parking state, so that the parking time on the liquid crystal display screen is cleared.However, previous electronic parking time display devices generally aim to scan the liquid crystal display screen via a control chip for display to reduce cost. In this way, control chips with a smaller number of pins can be used. For realizing the function, no additional driving chip is required for the liquid crystal display panel. However, due to the scanning method for driving the liquid crystal display panel, the contrast of the liquid crystal display panel is low, which is liable to cross-talk. Particularly, when a battery is used, the voltage difference between the old state and the new state of the battery is large, resulting in that the contrast of the liquid crystal display panel does not remain consistent throughout the life of the battery. Since electronic parking time display devices are commonly used in sunny external environments, low contrast is very unfavourable for viewing the displayed information. Moreover, the control chip must always be in a wake-up state to maintain the display of the liquid crystal display panel, resulting in the power consumption of the control chip being maintained at a high level, thereby shortening the life of the battery.CONTENT OF THE PRESENT INVENTIONIn order to overcome the above-mentioned disadvantages of the prior art, the purpose of the present invention is to provide a novel parking time display device. By changing the display control method of the existing liquid crystal display panel and adopting the static driving technology, on the one hand, the display effect of the liquid crystal display panel can be improved. On the other hand, the control chip may remain idle most of the time, thereby reducing power consumption of the entire device and extending the life of the battery.A parking time display device comprising a motion displacement sensor, a control chip and a statically driven liquid crystal display screen, wherein the output terminal of the motion displacement sensor is connected to a corresponding input terminal of the control chip, wherein a corresponding output terminal of the control chip is connected to the input terminal in the liquid crystal display screen, wherein the control chip is configured to read a signal output from the motion displacement sensor to judge whether the vehicle stops moving and then to output a control signal to the liquid crystal display screen to indicate the time at which the vehicle stops moving.It is further provided that the apparatus is further provided with input keys for setting parameters for connection to the corresponding input terminal of the control chip.It is further contemplated that the liquid crystal display screen comprises a static display driver chip and a liquid crystal display screen unit, the static display driver chip being connected to the serial communication port of the control chip via a serial communication port, the output port of the liquid crystal display screen of the static display driver chip being connected to the input port of the liquid crystal display screen unit.It is also provided that a glass flip chip package, a thin film flip chip package or a plastic flip chip package is used for the static display driver chip.It is further provided that the apparatus is further provided with a clock temperature compensation circuit comprising a voltage dividing resistor and a thermistor connected in series with an output terminal of the power supply or the control chip, wherein the input terminal of the voltage dividing line is connected to the input terminal of the control chip at the location of the series connection of the voltage dividing resistor with the thermistor.The present invention has the following advantages:The control chip need only be awakened at a certain time, so that the data of the motion displacement sensor is acquired to judge whether the state of the vehicle has changed. By virtue of the liquid crystal display screen being controlled statically independently, on the one hand the contrast of the liquid crystal display screen can be improved. High contrast and low crosstalk can be maintained even at higher or lower driving voltages, thereby maintaining excellent display results. On the other hand, the updated display information is output to the liquid crystal display screen only from the control chip through the output terminal connected to the liquid crystal display screen for display when the vehicle state changes. Therefore, the control chip remains idle for the rest of the time to greatly reduce the power consumption, thereby extending the life of the battery.BRIEF DESCRIPTION OF THE DRAWINGSThe present invention will be further explained in conjunction with the drawings: Fig. 1 is a structural block diagram of a system according to the present invention. FIG. 2 is a schematic circuit diagram according to the present invention.DETAILED DESCRIPTIONHereinafter, the concept, specific structure, and generated technical effects of the present invention will be clearly and fully described in combination with the embodiments and drawings in order to fully understand the purpose, solution, and effect of the present invention. Note that the embodiments in the present application and the features in the embodiments may be combined with each other unless otherwise contradicted.It should be appreciated that when a particular feature is referred to as being attached or connected to another feature, it may be attached directly or indirectly or connected to the other feature, unless otherwise indicated. Moreover, the descriptions of the above, below, left, right, top, bottom, etc. used in the present invention relate only to the mutual positional relationship of the components of the present invention in the drawings.Moreover, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art, unless otherwise defined. The terms used in the present specification are merely for describing specific embodiments and not for limiting the present utility model. As used herein, the term And / or includes any combination of one or more related listed items.It should be understood that although various elements may be described with the terms first, second, third, etc. in the present disclosure, these elements should not be limited to these terms. These terms merely serve to distinguish elements of the same type from one another. The first element may also be referred to as a second element, for example, without departing from the scope of the present disclosure. In an analogous manner, the second element can also be referred to as a first element.The parking time display device is composed of at least a motion displacement sensor, a control chip, and a statically driven liquid crystal display screen. The motion displacement sensor is used to collect the vibration signal generated by the vehicle and convert it into corresponding vibration data for output. The control chip reads out the corresponding vibration data via the input terminal for judgment, for example, a corresponding threshold value may be set to judge whether the vehicle is in a moving or parked state. The control chip may be implemented with the most basic MCU. In order to reduce power consumption, a chip with sleep function is recommended. The static driving of the liquid crystal display panel may be realized by a control chip or a special static display driver chip. When the MCU is used to directly statically drive the liquid crystal display screen, the MCU needs to have more I / O ports, which increases the acquisition cost of the MCU. Therefore, it is recommended to use a static display driver chip, and communication between the MCU and the static display driver chip is required only through the serial port. When no update of the display data is required, the MCU may be in a sleep state, so that the display of the liquid crystal display screen is maintained by the static display driver chip. When the display data needs to be updated, the new display data is sent only from the MCU to the static display driver chip via the serial port, so that the updated display content of the liquid crystal display screen is driven by the static display driver chip to maintain the display. The control chip need only be awakened at a certain time, so that the data of the motion displacement sensor is acquired to judge whether the state of the vehicle has changed. By virtue of the liquid crystal display screen being controlled statically independently, on the one hand the contrast of the liquid crystal display screen can be improved. High contrast and low crosstalk can be maintained even at higher or lower driving voltages, thereby maintaining excellent display results. On the other hand, the updated display information is output to the liquid crystal display screen only from the control chip through the output terminal connected to the liquid crystal display screen for display when the vehicle state changes. Therefore, the control chip remains idle for the rest of the time to greatly reduce the power consumption, thereby extending the life of the battery.In the first use, it is normally necessary to set the clock in the control chip, including the setting of date and time. Therefore, input keys must be provided which are connected to the corresponding input terminals of the control chip.As mentioned above, it is contemplated that the liquid crystal display panel includes a static display driver chip and a liquid crystal display panel unit, the static display driver chip being connected to the serial communication port of the control chip via a serial communication port, the output port of the liquid crystal display panel of the static display driver chip being connected to the input port of the liquid crystal display panel unit. In order to simplify the design of the circuit, the following packaging methods are adopted for the static display driver chip: glass flip chip packaging, thin film flip chip packaging or plastic flip chip packaging. By these packaging methods, the static display driver chip is directly combined with the liquid crystal display screen or the lead display cable to reduce the defect rate caused by the mounting and manufacturing of the circuit board.Normally, the accuracy of the clock module built into the MCU drifts with temperature changes. In order to improve the working accuracy of the clock module, a clock temperature compensation circuit is also added to the device, which circuit comprises a voltage divider resistor and a thermistor connected in series with an output terminal of the power supply or of the control chip, wherein the input terminal of the voltage divider line is connected to the input terminal of the control chip at the location of the series connection of the voltage divider resistor with the thermistor.In summary, a parking time display device is disclosed having a motion displacement sensor, a control chip and a statically driven liquid crystal display screen, wherein the output terminal of the motion displacement sensor is connected to a corresponding input terminal of the control chip, wherein a corresponding output terminal of the control chip is connected to the input terminal in the liquid crystal display screen, wherein the control chip is configured to read a signal output from the motion displacement sensor to judge whether the vehicle stops moving and then to output a control signal to the liquid crystal display screen to indicate the time at which the vehicle stops moving. The control chip need only be awakened at a certain time, so that the data of the motion displacement sensor is acquired to judge whether the state of the vehicle has changed. By virtue of the liquid crystal display screen being controlled statically independently, on the one hand the contrast of the liquid crystal display screen can be improved. High contrast and low crosstalk can be maintained even at higher or lower driving voltages, thereby maintaining excellent display results. On the other hand, the updated display information is output to the liquid crystal display screen only from the control chip through the output terminal connected to the liquid crystal display screen for display when the vehicle state changes. Therefore, the control chip remains idle for the rest of the time to greatly reduce the power consumption, thereby extending the life of the battery.In summary, a parking time display device is disclosed having a motion displacement sensor, a control chip and a statically driven liquid crystal display screen, wherein the output terminal of the motion displacement sensor is connected to a corresponding input terminal of the control chip, wherein a corresponding output terminal of the control chip is connected to the input terminal in the liquid crystal display screen, wherein the control chip is configured to read a signal output from the motion displacement sensor to judge whether the vehicle stops moving and then to output a control signal to the liquid crystal display screen to indicate the time at which the vehicle stops moving. The control chip need only be awakened at a certain time, so that the data of the motion displacement sensor is acquired to judge whether the state of the vehicle has changed. By virtue of the liquid crystal display screen being controlled statically independently, on the one hand the contrast of the liquid crystal display screen can be improved. High contrast and low crosstalk can be maintained even at higher or lower driving voltages, thereby maintaining excellent display results. On the other hand, the updated display information is output to the liquid crystal display screen only from the control chip through the output terminal connected to the liquid crystal display screen for display when the vehicle state changes. Therefore, the control chip remains idle for the rest of the time to greatly reduce the power consumption, thereby extending the life of the battery.The foregoing are only preferred embodiments of the present invention. The present invention is not limited to the above embodiments as long as it achieves the technical effects of the present invention by the same means. All changes, equivalent substitutions, improvements, etc., made within the spirit and principles of the present disclosure should be included within the scope of the present disclosure. Within the scope of the present invention, technical solutions and / or embodiments thereof may be subject to various modifications and variations.

Claims

A parking time display device comprising a motion displacement sensor, a control chip and a statically driven liquid crystal display screen, characterized in that the output terminal of the motion displacement sensor is connected to a corresponding input terminal of the control chip, a corresponding output terminal of the control chip being connected to the input terminal in the liquid crystal display screen, the control chip being configured to read a signal output from the motion displacement sensor to judge whether the vehicle stops moving and then to output a control signal to the liquid crystal display screen to indicate the time when the vehicle stops moving.The parking time display device according to claim 1, characterized in that the device is further provided with input keys for setting parameters for connecting to the corresponding input terminal of the control chip.The parking time display device according to claim 1 or 2, characterized in that the liquid crystal display screen comprises a static display driver chip and a liquid crystal display screen unit, the static display driver chip being connected to the serial communication port of the control chip via a serial communication port, the output port of the liquid crystal display screen of the static display driver chip being connected to the input port of the liquid crystal display screen unit.The parking time display device according to claim 3, characterized in that for the static display driver chip, a glass flip chip package, a thin film flip chip package or a plastic flip chip package is used.The parking time display device according to any one of claims 1-3, characterized in that the device is further provided with a clock temperature compensation circuit comprising a voltage divider resistor and a thermistor connected in series with an output terminal of the power supply or the control chip, wherein the input terminal of the voltage divider line is connected to the input terminal of the control chip at the location of the series connection of the voltage divider resistor with the thermistor.

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