CN110058765B - Screen capturing method and system for liquid crystal instrument - Google Patents
Screen capturing method and system for liquid crystal instrument Download PDFInfo
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- CN110058765B CN110058765B CN201910352604.5A CN201910352604A CN110058765B CN 110058765 B CN110058765 B CN 110058765B CN 201910352604 A CN201910352604 A CN 201910352604A CN 110058765 B CN110058765 B CN 110058765B
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- G06F16/90—Details of database functions independent of the retrieved data types
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- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0484—Interaction techniques based on graphical user interfaces [GUI] for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
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Abstract
The invention provides a screen capture method of a liquid crystal instrument, which receives a screen capture trigger instruction; reading display information of a screen, and selecting selection display information needing screen capture; comparing the selected display information with a preset system font library, and if the comparison result is matched, positioning the display position of the selected display information in a screen so as to determine a screen capture area; the system font library records the coordinates of the display information in the screen, and the positioning method comprises the steps of firstly acquiring the coordinates of the display position of the display information in the screen, and if the comparison result is matched, positioning to the corresponding coordinate position; according to the determined screen capture area, performing screen capture and storing the picture; displaying and transmitting pictures. The method captures the screen of the liquid crystal instrument which does not support the touch function and shares the real-time vehicle running information in real time. The invention also provides a screen capture system of the liquid crystal instrument.
Description
Technical Field
The invention relates to the field of display, in particular to a screen capturing method and a screen capturing system for a liquid crystal instrument.
Background
With the continuous development of electronic technology and the popularization of the internet, vehicle owners have an increasing demand for sharing vehicle condition information displayed by the liquid crystal instrument anytime and anywhere in real time. It is known from survey data (NHTSA-2010-. If a driver drives a vehicle while driving the vehicle, the driver can cross the steering wheel with a hand to touch the liquid crystal instrument display screen to read information, the operation is inconvenient, the sight line can stay on the display screen for a long time, and the driving danger is greatly increased. Based on safety considerations, liquid crystal instruments are not suitable for supporting touch functions. Therefore, a new system for sharing all or part of vehicle condition information generation pictures displayed on the liquid crystal instrument without the touch function through simple operation of the keys of the steering wheel is generated.
In the current market, a display screen supporting a touch function can be used for screen capture operation, if all or part of vehicle condition information (such as information of oil consumption, mileage, faults and the like) displayed by a liquid crystal instrument without the touch function needs to be shared, a vehicle owner can only use a photographing mode and the like, the operation performed in the vehicle driving process is easy to distract the vehicle owner, and great potential safety hazards exist. Meanwhile, the owner cannot independently screen-capture part of the content when the displayed content is screen-captured, and only the picture after screen-capture is cut and edited again can obtain the desired information picture, so that great inconvenience is brought to the owner.
Patent document CN103714787A discloses a display method of a liquid crystal instrument and a liquid crystal display device of an automobile, which aims to solve the problems that in the prior art, a large number of pictures need to be captured when data is displayed, the workload of designers is greatly increased, and more time is needed to process data, the invention provides a display method of a liquid crystal instrument, which comprises the following steps: acquiring data information needing to be displayed on a liquid crystal instrument in real time; calling a picture template with a positioned display area, wherein the picture template is used for being placed on a liquid crystal instrument to serve as a display carrier of the data information; determining a picture area on the display area according to the data information; displaying only the picture area in the display area.
Patent document CN104360816B discloses a screen capture method and system, the method includes the following steps: after receiving a screen capture triggering instruction, reading the display content of the current screen, and determining the initial position of a screen capture picture; monitoring touch screen operation of a user, and determining a screen capture picture termination position according to the touch screen operation; and reading image data from a frame buffer according to the initial position and the end position of the screen capture image, and generating the screen capture image.
None of the above patent documents relates to a technical solution for screen capturing according to a preset system font library.
Disclosure of Invention
The invention aims to provide a screen capture method for a liquid crystal instrument, which is used for capturing a screen of the liquid crystal instrument which does not support a touch function and sharing real-time vehicle running information in real time.
The invention relates to a screen capturing method of a liquid crystal instrument, which comprises the following steps:
s01: receiving a screen capture trigger instruction;
s02: reading display information of a screen, and selecting selected display information needing screen capture;
s03: comparing the selected display information with a preset system font library, and if the comparison result is matched, positioning the display position of the selected display information in a screen so as to determine a screen capture area;
s04: according to the determined screen capture area, performing screen capture and storing the picture;
s05: displaying and transmitting pictures.
Further, the system word stock comprises characters, numbers, letters and symbols, and the coordinates of the display information in the screen are recorded.
Further, the positioning method in step S03 is to first obtain the coordinates of the display position of the display information in the screen, and if the comparison result matches, then position the display information to the corresponding coordinate position.
Further, one method for comparing the selected display information in step S03 with the preset system font library is: and setting characters in the system font library, and if the characters of the selected display information are the same as the characters, positioning the display position of the selected display information in a screen so as to determine a screen capture area.
Further, another method for comparing the selected display information with the preset system word stock in step S03 is as follows: and setting a plurality of numerical value intervals in the system font library, and positioning the display position of the selected display information in a screen if the number of the selected display information is judged to be in a certain numerical value interval, thereby determining a screen capture area.
Further, another method for comparing the selected display information with the preset system word stock in step S03 is as follows: and setting letters in the system word stock, and if the unit of the selected display information is judged to be the same as the letters, positioning the display position of the selected display information in the screen so as to determine a screen capture area.
Further, another method for comparing the selected display information with the preset system word stock in step S03 is as follows: and setting a symbol in the system font library, and if the symbol of the selected display information is judged to be the same as the symbol, positioning the display position of the selected display information in a screen so as to determine a screen capture area.
Further, in the method for performing screen capturing in step S04, a circle or a sector is formed with the coordinate of the display position in the screen as a starting point, the area surrounded by the circle or the sector is the screen capturing range, and all pixel point information in the screen capturing range is obtained to generate the picture.
The invention also provides a screen capture system of the liquid crystal instrument, which comprises an input module, a trigger module, an information processing module, a selection module, a data module, a screen capture module, a display module and a communication module;
the input module is used for inputting a screen capture trigger instruction;
the triggering module is used for receiving a screen capturing triggering instruction to trigger the information processing module;
the information processing module comprises a processing unit and an image unit; the processing unit is used for reading display information of a screen; the image unit is used for displaying the display information on a screen;
the selection module is used for selecting and transmitting selection display information needing screen capturing;
the data module is used for storing the system word stock and comparing the selection display information with the system word stock;
the screen capture module comprises a coordinate unit, a generation unit and a storage unit; the coordinate unit is used for receiving a positioning signal, positioning the display position of the selected display information in the screen and acquiring coordinate data; the generating unit is used for receiving the coordinate data, capturing a screen and storing a picture; the storage unit receives a picture generated by screen capture;
the display module receives the pictures transmitted by the storage unit and is used for displaying and editing the pictures;
the communication module is used for transmitting pictures.
The invention has the beneficial effects that:
the selected display information is compared with a preset system font library, and if the comparison result is matched, the display position of the selected display information in the screen is positioned, so that the screen capture area is determined.
One method for comparing the selected display information with a preset system font library is as follows: and setting characters in the system character library, and if the characters of the selected display information are judged to be the same as the characters, positioning the display position of the selected display information in a screen so as to determine a screen capture area.
Another method for comparing the selected display information with the preset system word stock is as follows: and setting a plurality of numerical value intervals in the system font library, and positioning the display position of the selected display information in a screen if the number of the selected display information is judged to be in a certain numerical value interval, thereby determining a screen capture area.
Another method for comparing the selected display information with the preset system word stock is as follows: and setting letters in the system word stock, and if the unit of the selected display information is judged to be the same as the letters, positioning the display position of the selected display information in the screen so as to determine a screen capture area.
Another method for comparing the selected display information with the preset system word stock is as follows: and setting a symbol in the system font library, and if the symbol of the selected display information is judged to be the same as the symbol, positioning the display position of the selected display information in a screen so as to determine a screen capture area.
The method comprises the steps of capturing a screen of a liquid crystal instrument which does not support a touch function and sharing vehicle running information in real time; the screen capture method is convenient and fast to operate, screen capture content can be selected freely, and user experience is greatly improved.
Drawings
FIG. 1 is a schematic flow diagram of the present invention;
FIG. 2 is a schematic block diagram of a liquid crystal instrument screen capture system;
fig. 3 is a control circuit diagram.
In fig. 3:
1-one bond, 2-two bond, 3-three bond, 4-four bond;
10-a first fulcrum, 20-a second fulcrum, 30-a third fulcrum, and 40-a fourth fulcrum.
Detailed Description
The technical solution is further explained below with reference to the detailed description and the accompanying drawings.
Example 1
The invention provides a screen capture method of a liquid crystal instrument, which specifically comprises the following steps as shown in figure 1:
s01: after receiving the screen capture trigger command, the system enters the screen capture mode and then enters step S02.
Specifically, the screen capture trigger instruction CAN be input through a circuit signal or a CAN bus signal.
S02: and reading the display information of the screen and displaying the display information in a bullet frame form so that a user can select the selection display information needing screen capture.
Display information transmitted by an external unit (e.g., a speed sensor, a rotational speed sensor) is collected.
Specifically, the display information includes indicator light information, fuel information (oil amount and oil pressure), water temperature information, vehicle speed information, rotation speed information, and the like. For example, the vehicle speed is 30 km/h and the rotation speed is 3000 r/min.
S03: and comparing the selected display information with a preset system word stock, and if the comparison result is matched, positioning the display position of the selected display information in a screen so as to determine a screen capture area.
Specifically, the system word stock comprises words, numbers, letters and symbols.
The positioning method comprises the steps of firstly obtaining the coordinates of the display position of the display information in the screen, and positioning to the corresponding coordinate position if the comparison result is matched. I.e. the system font library records the coordinates of the display information in the screen.
Preferably, one method for comparing the selected display information with the preset system word stock is as follows: and setting characters in the system character library, and if the characters of the selected display information are judged to be the same as the characters, positioning the display position of the selected display information in a screen so as to determine a screen capture area.
For example, if the selected display information (average oil consumption) matches the average oil consumption characters set in the system word stock, the display position of the selected display information in the screen is located.
Preferably, another method for comparing the selected display information with the preset system word stock is as follows: and setting a plurality of numerical value intervals in the system font library, and positioning the display position of the selected display information in a screen if the number of the selected display information is judged to be in a certain numerical value interval, thereby determining a screen capture area.
For example, the speed range is 0-300 km/h, the rotation speed range is 1500-4000 r/min, the numerical values thereof have obvious difference, and the difference of the numerical values can be used as the basis for judgment.
Preferably, another method for comparing the selected display information with the preset system word stock is as follows: and setting letters in the system word stock, and if the unit of the selected display information is judged to be the same as the letters, positioning the display position of the selected display information in the screen so as to determine a screen capture area.
For example, the unit km/h of the selected display information (speed) matches the km/h set in the system font, and the display position of the selected display information in the screen is located.
Preferably, another method for comparing the selected display information with the preset system word stock is as follows: and setting a symbol in the system font library, and if the symbol of the selected display information is judged to be the same as the symbol, positioning the display position of the selected display information in a screen so as to determine a screen capture area.
For example, the symbol of the selective display information is a symbol for displaying water temperature, and the symbol matches with a water temperature symbol set in the system font, so that the display position of the selective display information (water temperature) in the screen is positioned.
S04: and according to the determined screen capture area, performing screen capture and saving the picture.
Preferably, one method for performing screen capture is to use coordinates of a display position in a screen as a starting point, use a certain length (for example, 3 cm) as a radius to form a circle or a sector, use a region surrounded by the circle or the sector as a screen capture range, and obtain information (for example, positions of pixels and RGB information) of all pixel points in the screen capture range to generate a picture.
The picture format is BMP format and can be converted into PNG format or JPG format.
S05: displaying and transmitting pictures.
Specifically, the picture is sent through WeChat or microblog.
Example 2
The invention also provides a screen capture system of the liquid crystal instrument, which comprises an input module, a trigger module, an information processing module, a selection module, a data module, a screen capture module, a display module and a communication module, as shown in fig. 2.
And the input module is used for inputting a screen capture triggering instruction.
Specifically, the input module is a key fixedly arranged on the steering wheel, and the key is composed of a first key 1, a second key 2, a three key 3 and a four key 4.
As shown in fig. 3, the button is electrically connected to the control circuit, and triggers the screen capture triggering instruction through an electrical signal. The control circuit comprises a first fulcrum 10, a second fulcrum 20, a third fulcrum 30 and a fourth fulcrum 40, wherein the first fulcrum 10 is respectively and electrically connected with a resistor R5, a key 1 and a resistor R4; the second fulcrum 20 is respectively and electrically connected with a resistor R4, a second key 2 and a resistor R3; the third pivot 30 is respectively and electrically connected with a resistor R3 and a triple key 3, and a resistor R2 and a resistor R1 which are connected in series; the fourth fulcrum 40 is electrically connected to the resistor R2, the resistor R1, the four-key 4 and the branch circuit in series, respectively. The branch circuit comprises a first parallel branch and a second parallel branch, the first parallel branch is electrically connected with the pull-up resistor R6, and the second parallel branch is electrically connected with the trigger module.
The resistances of the resistor R1, the resistor R2, the resistor R3, the resistor R4, the resistor 5, the resistor R1, and the pull-up resistor R6 are set according to the function.
As a specific embodiment: the terminal voltage of pull-up resistor R6 is 3.3V. Pressing one key 1, the second parallel branch generates a voltage of 2.14V. Pressing the two-key 2, the second parallel branch generates a voltage of 2.58V. Pressing the triple key 3, the second parallel branch generates a voltage of 1.57V. And when the four-key 4 is pressed, the value of the voltage generated by the second parallel branch is less than 0.322V. And setting that when the voltage is less than 0.322V and the duration is more than 5 s, triggering a screen capture triggering instruction.
Specifically, the input module inputs a screen capture trigger instruction through a CAN bus signal.
And the triggering module is used for receiving a screen capture triggering instruction so as to trigger the information processing module. The trigger module can adopt MCU.
The information processing module comprises a processing unit and an image unit.
And the processing unit is used for reading the display information of the screen.
In particular, one way to read the display information of the screen is for the processing unit to receive the display information transmitted by an external acquisition unit (e.g. speed sensor, rotation speed sensor).
And the image unit is used for displaying the display information on the screen in the form of an image pop frame.
Specifically, the image bullet frame is square or circular.
And the selection module is used for selecting and transmitting the selection display information needing screen capturing.
And the data module is used for storing the system word stock and comparing the selected display information with the system word stock. The system word stock comprises words, numbers, letters and symbols. If the comparison result is consistent, a positioning signal is sent out.
The screen capture module comprises a coordinate unit, a generation unit and a storage unit.
And the coordinate unit is used for receiving the positioning signal, positioning the display position of the selected display information in the screen and acquiring coordinate data.
Specifically, the system word stock records coordinates of display information in a screen, and the coordinate unit positions the display information to a corresponding coordinate position after receiving the positioning signal.
And the generating unit is used for receiving the coordinate data, capturing a screen and storing the picture.
Specifically, a circle or a sector is formed by taking the received coordinates as a starting point and taking a certain length (for example, 3 cm) as a radius, an area surrounded by the circle or the sector is a screen capture range, and information of all pixel points in the screen capture range is acquired to generate a picture.
The generation unit may employ a GPU.
The storage unit receives the pictures generated by screen capture and stores 40 pictures by default.
Specifically, if more than 40 pictures need to be stored, the picture with the earliest storage time is deleted by default, and rolling storage is performed.
And the display module receives the pictures transmitted by the storage unit and is used for displaying and editing the pictures.
For example, if the transmission of the screen shot picture is successful, the display "the transmission of the meter screen shot data is successful" shows that the time is 3 seconds. If the transmission of the screen capture picture fails, displaying that the transmission of the instrument screen capture data fails, wherein the display time is 3 seconds.
It should be noted that the reasons why the screen capture data transmission fails include: the power supply gear of the whole vehicle is changed from an ON gear to an ACC gear or an OFF gear; the gear of the whole vehicle is changed from non-reverse gear to reverse gear; switching the theme of the liquid crystal instrument or the display module; carrying out upgrading operation on the liquid crystal instrument or the display module; and starting the IACC function.
The communication module is used for transmitting pictures.
Specifically, the communication module transmits and shares pictures with APPs (WeChat and microblog) through a network.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and substitutions can be made without departing from the principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (7)
1. A screen capture method of a liquid crystal instrument is characterized in that,
the method comprises the following steps:
s01: receiving a screen capture trigger instruction;
s02: reading display information of a screen, and selecting selection display information needing screen capture;
s03: comparing the selected display information with a preset system font library, and if the comparison result is matched, positioning the display position of the selected display information in a screen so as to determine a screen capture area;
s04: according to the determined screen capture area, performing screen capture and storing the picture;
s05: displaying and transmitting pictures;
the system word stock comprises characters, numbers, letters and symbols, and records the coordinates of display information in a screen; the positioning method in step S03 is to first obtain the coordinates of the display position of the display information in the screen, and if the comparison result matches, then position the display information to the corresponding coordinate position.
2. The screen capturing method for liquid crystal instrument of claim 1, wherein one method for comparing the selected display information in step S03 with the preset system font library is: and setting characters in the system character library, and if the characters of the selected display information are judged to be the same as the characters, positioning the display position of the selected display information in a screen so as to determine a screen capture area.
3. The screen capturing method for the liquid crystal instrument according to claim 1 or 2, wherein another method for comparing the selected display information with the preset system font library in the step S03 is: and setting a plurality of numerical value intervals in the system font library, and positioning the display position of the selected display information in a screen if the number of the selected display information is judged to be in a certain numerical value interval, thereby determining a screen capture area.
4. The screen capturing method for liquid crystal instrument of claim 3, wherein the further method for comparing the selected display information in step S03 with the preset system font library is: and setting letters in the system word stock, and if the unit of the selected display information is judged to be the same as the letters, positioning the display position of the selected display information in the screen so as to determine a screen capture area.
5. The liquid crystal meter screen capturing method according to claim 1, 2 or 4, wherein another method for comparing the selected display information in step S03 with the preset system word stock is: and setting a symbol in the system font library, and if the symbol of the selected display information is judged to be the same as the symbol, positioning the display position of the selected display information in a screen so as to determine a screen capture area.
6. The liquid crystal instrument screen capturing method of claim 5, wherein in the step S04, the screen capturing method is to form a circle or a sector with the coordinates of the display position in the screen as a starting point, the area enclosed by the circle or the sector is the screen capturing range, and all pixel point information in the screen capturing range is obtained to generate the picture.
7. A screen capture system of a liquid crystal instrument is characterized by comprising an input module, a trigger module, an information processing module, a selection module, a data module, a screen capture module, a display module and a communication module;
the input module is used for inputting a screen capture trigger instruction;
the triggering module is used for receiving a screen capture triggering instruction so as to trigger the information processing module;
the information processing module comprises a processing unit and an image unit; the processing unit is used for reading display information of a screen; the image unit is used for displaying the display information on a screen;
the selection module is used for selecting and transmitting selection display information needing screen capturing;
the data module is used for storing the system word stock and comparing the selection display information with the system word stock;
the screen capture module comprises a coordinate unit, a generation unit and a storage unit; the coordinate unit is used for receiving a positioning signal, positioning the display position of the selected display information in the screen and acquiring coordinate data;
the generating unit is used for receiving the coordinate data, capturing a screen and storing a picture;
the storage unit receives a picture generated by screen capture;
the display module receives the pictures transmitted by the storage unit and is used for displaying and editing the pictures;
the communication module is used for transmitting pictures.
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| CN111845345A (en) * | 2020-06-28 | 2020-10-30 | 东风电驱动系统有限公司 | Automobile full liquid crystal instrument display state screenshot transmission method |
| CN114312809A (en) * | 2021-12-31 | 2022-04-12 | 上海洛轲智能科技有限公司 | Vehicle-mounted display terminal control method, device, vehicle, medium and program product |
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