CN116456050A - Automatic opening display method of entrance machine - Google Patents
Automatic opening display method of entrance machine Download PDFInfo
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- CN116456050A CN116456050A CN202310417600.7A CN202310417600A CN116456050A CN 116456050 A CN116456050 A CN 116456050A CN 202310417600 A CN202310417600 A CN 202310417600A CN 116456050 A CN116456050 A CN 116456050A
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 116
- 230000006870 function Effects 0.000 claims abstract description 21
- 238000005070 sampling Methods 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 7
- 230000010354 integration Effects 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 230000008571 general function Effects 0.000 claims 1
- 238000004891 communication Methods 0.000 description 15
- 230000000007 visual effect Effects 0.000 description 10
- 230000009286 beneficial effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000013459 approach Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000006854 communication Effects 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000007175 bidirectional communication Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000004382 visual function Effects 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
- H04N7/142—Constructional details of the terminal equipment, e.g. arrangements of the camera and the display
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/183—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source
- H04N7/186—Video door telephones
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- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention provides an automatic opening display method of a door phone, which comprises the following steps: the entrance machine is in a standby state, and the liquid crystal screen is in a closed state under the control of the controller; acquiring temperature information and humidity information through a temperature sensor and a humidity sensor of the entrance machine, and outputting the brightness and contrast of the backlight source of the liquid crystal display by the controller according to the temperature and humidity digital signals; when a user touches a key of the door phone, the controller receives a first instruction and starts a first liquid crystal screen; when the called user starts the video, the controller receives a second instruction and starts a second liquid crystal screen; and according to a third instruction preset by the controller, the controller receives the third instruction and starts a third liquid crystal screen. According to the invention, the brightness and contrast of the backlight source of the liquid crystal display are adjusted according to the temperature and humidity information, so that the complexity of adjustment after the liquid crystal display is lightened is eliminated; meanwhile, the service time of the liquid crystal screen is ensured; the liquid crystal display screens are divided into functions, so that each liquid crystal display screen is automatically opened when in use, and the operation is convenient.
Description
Technical Field
The invention relates to the technical field of door phones, in particular to an automatic opening display method of a door phone.
Background
The gate machine is a gating and intercom control device installed at the entrance of the building burglary-resisting door, the host machine is generally installed on the burglary-resisting door of the gate of each unit residence or on the wall nearby, the main function is to realize the conversation, intercom and unlocking with any resident in the unit building, and some of the gate machines also have visual functions. Because the use is more frequent, the service time and the service life of the liquid crystal screen of the entrance machine are seriously influenced, and if the liquid crystal screen is always in an open state, the service life of the liquid crystal screen is definitely greatly shortened; however, in the prior art, the automatic opening display of the liquid crystal screen of the door phone is generally realized by arranging an inductor, so that the function of the door phone is complex, the intelligent control level is not higher, and the liquid crystal screen is not well protected.
In the first prior art, application number 201510639232.6 discloses an automatic opening display method of a door phone, wherein the door phone comprises a camera and a liquid crystal display screen, and the automatic opening display method comprises the following steps: controlling the liquid crystal display screen to be in a screen-closing state under the standby condition; continuously acquiring video image data through a camera on the entrance machine; comparing the change of the adjacent video image data to judge whether a user approaches the entrance machine; when the camera detects that a person approaches the entrance machine, automatically starting a liquid crystal display screen on the entrance machine; although the user can check and operate conveniently, the control algorithm does not influence the original basic functions of the door phone, and does not add additional elements or devices, so that the competitiveness of the product can be effectively improved; however, the structure is complex, a person approaches the door phone, the door phone is not needed, and the service time of the liquid crystal display can not be prolonged to a certain extent.
Second prior art, application number 201510107115.5 discloses a WeChat building visual intercom system, comprising: building visual intercom gate machine, building visual intercom terminal machine and micro-communication platform; the building visual intercom gate machine and the building visual intercom terminal machine are respectively connected with the WeChat platform network; the building visual intercom gate machine and the building visual intercom terminal machine both comprise a micro-communication module capable of communicating with a micro-communication platform, and the micro-communication module is in bidirectional communication with the micro-communication platform through a micro-communication interface and is used for receiving or transmitting video data, audio data and control signals; although the video and audio communication functions of the building visual intercom gate machine and the building visual intercom terminal machine are realized, the automatic opening function of the liquid crystal screen is lacked.
In the third prior art, application number 201510107261.8 discloses a visible intercom gate machine of WeChat building, including: the system comprises a main control module, an audio encoding and decoding module, a video encoding and decoding module, an audio and video synchronization module, a WeChat communication module, an access control module and a man-machine interaction module, wherein the main control module is provided with an echo elimination module and a noise elimination module; the micro-communication module comprises a micro-communication interface which is communicated with the micro-communication platform, and the micro-communication module sends video data or audio data to the micro-communication platform or receives audio data and control signals from the micro-communication platform through the micro-communication interface; although the system has mobility and diversity, enriches the use modes of the building visual intercom system, the system also lacks the automatic opening function of a liquid crystal screen, and increases the energy consumption.
The automatic opening display method of the door phone provided by the invention realizes automatic opening display by receiving the instruction of the key and adjusts the brightness of the liquid crystal screen according to the change of the surrounding environment, thereby achieving the purposes of automatic display of the liquid crystal screen and prolonging the service life.
Disclosure of Invention
In order to solve the technical problems, the invention provides an automatic opening display method of a door phone, which comprises the following steps:
the entrance machine is in a standby state, and the liquid crystal screen is in a closed state under the control of the controller;
acquiring temperature information and humidity information through a temperature sensor and a humidity sensor of the entrance machine, and outputting the brightness and contrast of the backlight source of the liquid crystal display by the controller according to the temperature and humidity digital signals;
when a user touches a key of the door phone, the controller receives a first instruction and starts a first liquid crystal screen; when the called user starts the video, the controller receives a second instruction and starts a second liquid crystal screen; and according to a third instruction preset by the controller, the controller receives the third instruction and starts a third liquid crystal screen.
Optionally, the liquid crystal screen is divided into three areas, namely a first liquid crystal screen, a second liquid crystal screen and a third liquid crystal screen, so that different functions are given, the first liquid crystal screen is used for displaying numbers of keys, the second liquid crystal screen is used for displaying videos of users and called users, and the third liquid crystal screen is used for displaying a preset interface including date, weather and background pictures.
Optionally, the method for entering the key corresponding program when the door phone is in the standby state comprises the following steps:
the controller judges whether an instruction corresponding to the key is effective or not, wherein the instruction is to press the key for a plurality of times or form a touch track on the touch panel;
the instruction is effective, the controller assigns values to the internal registers, sends interrupt signals to the corresponding programs of the keys, and enters a standby state if the instruction is ineffective;
the program corresponding to the key receives the interrupt signal, reads the value in the register and enters the program corresponding to the value.
Optionally, the control method of the key corresponding program includes the following steps:
setting an entering condition and an exiting condition of different special programs, powering on the door phone, judging whether the key time exceeds a first threshold value after the key is pressed, if so, executing the first special program, and if not, invalidating the key;
judging whether the key time is lower than a second threshold value, if yes, executing a first special program, and if no, executing a second special program;
judging whether the key time is lower than a third threshold value, if yes, executing a second special program, and if no, executing a third special program;
and when the key combination operation is received, entering a fourth special program.
Optionally, the first threshold is 1s in time, the second threshold is 3s in time, and the third threshold is 5s in time.
Optionally, the first special program is a program for displaying a common function, namely, displaying the number of the key; the second special program is used for displaying videos of the user and the called user, the third special program is used for displaying a preset interface comprising date, weather and background pictures, and the fourth special program is a maintenance program.
Optionally, the entering condition of the special program includes a program corresponding to the key press timer.
Optionally, the processing procedure of the temperature information and the humidity information comprises the following steps:
the controller receives analog signals collected by the temperature sensor and the humidity sensor, and the analog signals are sampled by the sampling circuit under the control of the controller switch array to generate sampled temperature and humidity signals;
the integrating circuit integrates the superposition part of the sampling signal and the feedback signal of the analog signal, and generates an output signal according to the integration result of the superposition part;
the comparator generates a digital signal according to the output signal, and outputs the digital signal to the analog-to-digital converter and the digital filter to obtain digital signals of the temperature sensor and the humidity sensor.
Optionally, the process of outputting the brightness and contrast of the backlight source of the liquid crystal display according to the temperature and humidity digital signals comprises the following steps:
the controller receives digital signals of the temperature sensor and the humidity sensor, inputs the digital signals into the comparator, and prestores digital signals corresponding to the brightness and the contrast of the backlight source of the liquid crystal display in the comparator;
the comparator outputs a first comparison result of the digital signal of the temperature sensor, and the controller adjusts the brightness of the backlight source of the liquid crystal display according to the first comparison result;
the comparator outputs a second comparison result of the digital signal of the humidity sensor, and the controller adjusts the contrast of the backlight source of the liquid crystal display according to the second comparison result;
and feeding back the brightness and contrast of the backlight source of the liquid crystal display to the controller, storing and judging whether the brightness and contrast are consistent with the first contrast result and the second contrast result or not by the controller, and if not, re-comparing the digital signal by the comparator.
Optionally, the processing procedure of the controller on the key comprises the following steps:
when the controller receives an instruction corresponding to the key, analyzing a key value corresponding to the instruction, wherein the key value corresponds to a key value of the scientific calculator, and when the key is pressed, the key value corresponding to the key instruction is in an activated state;
judging whether a preset key value corresponding to the key value exists in the controller or not;
executing a program corresponding to the key instruction if the preset key value exists;
and if the preset key value does not exist, discarding the key instruction to prompt the re-input.
The door machine is in a standby state, and the liquid crystal screen is in a closed state under the control of the controller; secondly, acquiring temperature information and humidity information through a temperature sensor and a humidity sensor of the entrance machine, and outputting the brightness and contrast of the backlight source of the liquid crystal display by the controller according to the temperature and humidity digital signals; finally, when a user touches a key of the door phone, the controller receives a first instruction and starts a first liquid crystal screen; when the called user starts the video, the controller receives a second instruction and starts a second liquid crystal screen; according to a third instruction preset by the controller, the controller receives the third instruction and starts a third liquid crystal screen; according to the scheme, the temperature and humidity are collected, so that the collection of temperature and humidity information around the entrance machine is realized, and the controller adjusts the brightness and contrast of the backlight source of the liquid crystal display according to the temperature and humidity information, so that the trouble of adjusting the liquid crystal display after being lightened is eliminated, and a user has better experience, and meanwhile, the service time of the liquid crystal display is effectively ensured; dividing the liquid crystal screen into three areas, namely a first liquid crystal screen, a second liquid crystal screen and a third liquid crystal screen, endowing different functions, wherein the first liquid crystal screen is used for displaying common functions, such as: displaying the number of the key, namely the room number; the second liquid crystal screen is used for displaying videos of users and called users, the third liquid crystal screen is used for displaying preset interfaces including date, weather, background pictures and the like, the liquid crystal screens are divided into functions, each liquid crystal screen can be used independently and can be used together, each liquid crystal screen is automatically opened when in use, the function is simple, the operation is convenient, the automatic opening display function of the entrance machine is guaranteed, and the service lives of the entrance machine and the liquid crystal screen are prolonged.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
fig. 1 is a flowchart of an automatic opening display method of a door phone in embodiment 1 of the present invention;
fig. 2 is a flowchart of a method for entering a key correspondence program when the door phone is in a standby state in embodiment 2 of the present invention;
FIG. 3 is a flowchart of a control method of a key correspondence program in embodiment 3 of the present invention;
FIG. 4 is a diagram showing the processing of temperature information and humidity information in example 4 of the present invention;
FIG. 5 is a diagram of an integration circuit in embodiment 4 of the present invention;
FIG. 6 is a process diagram showing the output of the brightness and contrast ratio of the LCD backlight according to the temperature and humidity digital signals in embodiment 5 of the present invention;
fig. 7 is a diagram illustrating a process of the controller to press keys in embodiment 6 of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the accompanying claims. In the description of this application, it should be understood that the terms "first," "second," "third," and the like are used merely to distinguish between similar objects and are not necessarily used to describe a particular order or sequence, nor should they be construed to indicate or imply relative importance. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
Example 1: as shown in fig. 1, an embodiment of the present invention provides an automatic opening display method for a door phone, including the following steps:
s100: the entrance machine is in a standby state, and the liquid crystal screen is in a closed state under the control of the controller;
s200: acquiring temperature information and humidity information through a temperature sensor and a humidity sensor of the entrance machine, and outputting the brightness and contrast of the backlight source of the liquid crystal display by the controller according to the temperature and humidity digital signals;
s300: when a user touches a key of the door phone, the controller receives a first instruction and starts a first liquid crystal screen; when the called user starts the video, the controller receives a second instruction and starts a second liquid crystal screen; according to a third instruction preset by the controller, the controller receives the third instruction and starts a third liquid crystal screen;
the working principle and beneficial effects of the technical scheme are as follows: in the embodiment, firstly, the entrance machine is in a standby state, and the liquid crystal screen is in a closed state under the control of the controller; secondly, acquiring temperature information and humidity information through a temperature sensor and a humidity sensor of the entrance machine, and outputting the brightness and contrast of the backlight source of the liquid crystal display by the controller according to the temperature and humidity digital signals; finally, when a user touches a key of the door phone, the controller receives a first instruction and starts a first liquid crystal screen; when the called user starts the video, the controller receives a second instruction and starts a second liquid crystal screen; according to a third instruction preset by the controller, the controller receives the third instruction and starts a third liquid crystal screen; according to the scheme, the temperature and humidity are collected, so that the collection of temperature and humidity information around the entrance machine is realized, and the controller adjusts the brightness and contrast of the backlight source of the liquid crystal display according to the temperature and humidity information, so that the trouble of adjusting the liquid crystal display after being lightened is eliminated, and a user has better experience, and meanwhile, the service time of the liquid crystal display is effectively ensured; dividing the liquid crystal screen into three areas, namely a first liquid crystal screen, a second liquid crystal screen and a third liquid crystal screen, endowing different functions, wherein the first liquid crystal screen is used for displaying common functions, such as: displaying the number of the key, namely the room number; the second liquid crystal screen is used for displaying videos of users and called users, the third liquid crystal screen is used for displaying preset interfaces including date, weather, background pictures and the like, the liquid crystal screens are divided into functions, each liquid crystal screen can be used independently and can be used together, each liquid crystal screen is automatically opened when in use, the function is simple, the operation is convenient, the automatic opening display function of the entrance machine is guaranteed, and the service lives of the entrance machine and the liquid crystal screen are prolonged.
Example 2: as shown in fig. 2, on the basis of embodiment 1, the method for entering the key corresponding program when the door phone is in the standby state according to the embodiment of the present invention includes the following steps:
s101: the controller judges whether an instruction corresponding to the key is effective or not, wherein the instruction is to press the key for a plurality of times or form a touch track on the touch panel;
s102: the instruction is effective, the controller assigns values to the internal registers, sends interrupt signals to the corresponding programs of the keys, and enters a standby state if the instruction is ineffective;
s103: the program corresponding to the key receives the interrupt signal, reads the value in the register and enters the program corresponding to the value;
the working principle and beneficial effects of the technical scheme are as follows: the controller judges whether an instruction corresponding to the key is valid or not, wherein the instruction is to press the key for a plurality of times or form a touch track on the touch panel; then the instruction is effective, the controller carries out assignment on the internal register, and sends an interrupt signal to a program corresponding to the key, and the instruction is ineffective, so that the scanning state is entered; finally, the program corresponding to the key receives the interrupt signal, reads the value in the register and enters the program corresponding to the value; according to the scheme, the key instruction is judged, the register is assigned, and the program corresponding to the key is started, so that the door phone is ensured to be in the standby state and can be rapidly switched to the working state, the response speed of the door phone is improved, and the customer experience is improved.
Example 3: as shown in fig. 3, on the basis of embodiment 2, the control method of the key correspondence program provided in the embodiment of the present invention includes the following steps:
s1021: setting an entering condition and an exiting condition of different special programs, powering on the door phone, judging whether the key time exceeds a first threshold value after the key is pressed, if so, executing the first special program, and if not, invalidating the key;
s1022: judging whether the key time is lower than a second threshold value, if yes, executing a first special program, and if no, executing a second special program;
s1023: judging whether the key time is lower than a third threshold value, if yes, executing a second special program, and if no, executing a third special program;
s1024: when the key combination operation is received, a fourth special program is entered;
the time of the first threshold is 1s, the time of the second threshold is 3s, and the time of the third threshold is 5s;
the first special program is a program showing ordinary functions, such as: displaying the number of the key, namely the room number; the second special program is used for displaying videos of a user and a called user, the third special program is used for displaying a preset interface comprising date, weather, background pictures and the like, and the fourth special program is a maintenance program;
the entering condition of the special program comprises a program corresponding to the key time machine.
The working principle and beneficial effects of the technical scheme are as follows: the method comprises the steps of firstly setting the entering condition and the exiting condition of different special programs, powering on a door phone, judging whether the key time exceeds a first threshold value after the key is pressed, executing the first special program if the key time exceeds the first threshold value, and invalidating the key if the key time does not exceed the first threshold value; judging whether the key time is lower than a second threshold value, if yes, executing a first special program, and if no, executing a second special program; judging whether the key time is lower than a third threshold value, if yes, executing a second special program, and if no, executing a third special program; when the key combination operation is received, a fourth special program is entered; according to the scheme, different thresholds are set, so that different special programs are set, convenience in key operation is improved, starting speed of the programs is effectively improved, occupied space of an operation panel of the door phone is reduced, and manufacturing cost of a shell and a panel of the door phone is also reduced; through the setting of a plurality of threshold values, the effective judgment of key operation time is improved, the operation purpose of a user can be timely executed, and the use of the user is more convenient.
Example 4: as shown in fig. 4, on the basis of embodiment 1, the processing procedure of the temperature information and the humidity information provided by the embodiment of the present invention includes the following steps:
s201: the controller receives analog signals collected by the temperature sensor and the humidity sensor, and the analog signals are sampled by the sampling circuit under the control of the controller switch array to generate sampled temperature and humidity signals;
s202: the integrating circuit integrates the superposition part of the sampling signal and the feedback signal of the analog signal, and generates an output signal according to the integration result of the superposition part;
as shown in fig. 5, the integrating circuit comprises a front-end bias circuit, an operational amplifier U, a reset switch S and a feedback capacitor C, and the specific connection relationship is as follows: one end of the dark pixel resistor R1 is connected with one end of the photosensitive pixel resistor R2 and the inverting input end of the operational amplifier U, the inverting input end of the operational amplifier U is connected with the positive electrode of the feedback capacitor C and one end of the reset switch S, the negative electrode of the feedback capacitor C and the other end of the reset switch S are connected with the output end of the operational amplifier U, and the non-inverting input end of the operational amplifier U is a reference voltage input end; v1, V2 and V3 are the paranoid voltages of the integrating circuit, I1 represents dark pixel current, I2 represents photosensitive pixel current, I3 represents integrating current, and V4 represents the output voltage of the operational amplifier U;
wherein B represents the voltage of the dark pixel resistor R1 and the photosensitive pixel resistor R2, the resistance value of the photosensitive pixel resistor R2 which changes after illumination is R3=R1 (1-alpha) =R2 (1-alpha), T represents the integration time, and alpha represents the absorption illumination rate of the dark pixel resistor R1 and the photosensitive pixel resistor R2;
s203: the comparator generates a digital signal according to the output signal, and outputs the digital signal to the analog-to-digital converter and the digital filter to obtain digital signals of the temperature sensor and the humidity sensor;
the working principle and beneficial effects of the technical scheme are as follows: in the embodiment, firstly, a controller receives analog signals acquired by a temperature sensor and a humidity sensor, and the analog signals are sampled by a sampling circuit under the control of a controller switch array to generate sampling temperature and humidity signals; secondly, an integrating circuit integrates a superposition part of a sampling signal and a feedback signal of the analog signal, and an output signal is generated according to an integration result of the superposition part; finally, the analog-to-digital converter generates a digital signal according to the output signal and outputs the digital signal to the digital filter to obtain digital signals of the temperature sensor and the humidity sensor; according to the scheme, the integrating circuit is adopted, the integrating drift caused by the offset voltage is reduced through the integrating circuit, the supply of the offset voltage is reduced, the stability and the reliability of an output signal are improved, the digital signal is generated through the analog-to-digital converter, the brightness and the contrast ratio of the backlight source of the liquid crystal display are improved, and the signal identification efficiency is improved; the digital signal is filtered through the digital filter, so that the influence of interference signals is restrained, and the control efficiency of the digital signal is improved.
Example 5: as shown in fig. 6, based on embodiment 1, the process of outputting the brightness and contrast of the backlight source of the liquid crystal display according to the temperature and humidity digital signals provided by the embodiment of the invention includes the following steps:
s204: the controller receives digital signals of the temperature sensor and the humidity sensor, inputs the digital signals into the comparator, and prestores digital signals corresponding to the brightness and the contrast of the backlight source of the liquid crystal display in the comparator;
s205: the comparator outputs a first comparison result of the digital signal of the temperature sensor, and the controller adjusts the brightness of the backlight source of the liquid crystal display according to the first comparison result;
s206: the comparator outputs a second comparison result of the digital signal of the humidity sensor, and the controller adjusts the contrast of the backlight source of the liquid crystal display according to the second comparison result;
s207: the brightness and contrast of the backlight source of the liquid crystal display are fed back to the controller, the controller stores and judges whether the brightness and the contrast are consistent with the first contrast result and the second contrast result, and if the brightness and the contrast are inconsistent with the first contrast result and the second contrast result, the comparator re-compares the digital signals;
the working principle and beneficial effects of the technical scheme are as follows: the controller receives the digital signals of the temperature sensor and the humidity sensor, inputs the digital signals into the comparator, and prestores digital signals corresponding to the brightness and contrast of the backlight source of the liquid crystal display in the comparator; secondly, the comparator outputs a first comparison result of the digital signal of the temperature sensor, and the controller adjusts the brightness of the backlight source of the liquid crystal display according to the first comparison result; then the comparator outputs a second comparison result of the digital signal of the humidity sensor, and the controller adjusts the contrast of the backlight source of the liquid crystal display according to the second comparison result; finally, the brightness and contrast of the backlight source of the liquid crystal display are fed back to the controller, the controller stores and judges whether the brightness and the contrast are consistent with the first contrast result and the second contrast result, and if the brightness and the contrast are inconsistent with the first contrast result and the second contrast result, the comparator re-compares the digital signals; according to the scheme, the brightness and the contrast of the backlight source of the liquid crystal display are respectively adjusted according to the temperature and the humidity, the brightness and the contrast are simultaneously adjusted, the defect that the brightness can only be adjusted is overcome, the experience of a user is improved due to the simultaneous adjustment of the brightness and the contrast, the equipment is protected, and the damage to eyes of the user is reduced.
Implementation of the embodiments example 6: as shown in fig. 7, on the basis of embodiment 1, the processing procedure of the controller for the key provided in the embodiment of the present invention includes the following steps:
s301: when the controller receives an instruction corresponding to the key, analyzing a key value corresponding to the instruction, wherein the key value corresponds to a key value of the scientific calculator, and when the key is pressed, the key value corresponding to the key instruction is in an activated state;
s302: judging whether a preset key value corresponding to the key value exists in the controller or not;
s303: executing a program corresponding to the key instruction if the preset key value exists;
s304: if the preset key value does not exist, discarding the key instruction and prompting to input again;
the working principle and beneficial effects of the technical scheme are as follows: firstly, when a controller receives an instruction corresponding to a key, analyzing a key value corresponding to the instruction, wherein the key value corresponds to a key value of a scientific calculator, and when the key is pressed, the key value corresponding to the key instruction is in an activated state; secondly, judging whether a preset key value corresponding to the key value exists in the controller or not; then, if a preset key value exists, executing a program corresponding to the key instruction; finally, if the preset key value does not exist, discarding the key instruction and prompting to input again; the key instruction identification method and device achieve key instruction identification, promote first instructions, second instructions and third instructions, facilitate automatic display of the first liquid crystal screen, the second liquid crystal screen and the third liquid crystal screen, effectively save the use area of the liquid crystal screen, greatly reduce the time for automatic starting display of the entrance machine, and prolong the use time of the entrance machine.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. The automatic opening display method of the door phone is characterized by comprising the following steps of:
the entrance machine is in a standby state, and the liquid crystal screen is in a closed state under the control of the controller;
acquiring temperature information and humidity information through a temperature sensor and a humidity sensor of the entrance machine, and outputting the brightness and contrast of the backlight source of the liquid crystal display by the controller according to the temperature and humidity digital signals;
when a user touches a key of the door phone, the controller receives a first instruction and starts a first liquid crystal screen; when the called user starts the video, the controller receives a second instruction and starts a second liquid crystal screen; and according to a third instruction preset by the controller, the controller receives the third instruction and starts a third liquid crystal screen.
2. The automatic opening display method of the door phone according to claim 1, wherein the liquid crystal screen is divided into three areas, namely, a first liquid crystal screen, a second liquid crystal screen and a third liquid crystal screen, different functions are given to the liquid crystal screen, the first liquid crystal screen is used for displaying numbers of keys, the second liquid crystal screen is used for displaying videos of users and called users, and the third liquid crystal screen is used for displaying a preset interface including date, weather and background pictures.
3. The method for automatically opening and displaying the door phone according to claim 1, wherein the method for entering the key correspondence program when the door phone is in the standby state comprises the steps of:
the controller judges whether an instruction corresponding to the key is effective or not, wherein the instruction is to press the key for a plurality of times or form a touch track on the touch panel;
the instruction is effective, the controller assigns values to the internal registers, sends interrupt signals to the corresponding programs of the keys, and enters a standby state if the instruction is ineffective;
the program corresponding to the key receives the interrupt signal, reads the value in the register and enters the program corresponding to the value.
4. The automatic opening display method of door phone according to claim 3, wherein the control method of the key correspondence program comprises the steps of:
setting an entering condition and an exiting condition of different special programs, powering on the door phone, judging whether the key time exceeds a first threshold value after the key is pressed, if so, executing the first special program, and if not, invalidating the key;
judging whether the key time is lower than a second threshold value, if yes, executing a first special program, and if no, executing a second special program;
judging whether the key time is lower than a third threshold value, if yes, executing a second special program, and if no, executing a third special program;
and when the key combination operation is received, entering a fourth special program.
5. The method for automatically opening and displaying a door phone according to claim 4, wherein the time of the first threshold is 1s, the time of the second threshold is 3s, and the time of the third threshold is 5s.
6. The method for automatically opening and displaying a door phone according to claim 4, wherein the first special program is a program for displaying a general function, i.e., a number of a display button; the second special program is used for displaying videos of the user and the called user, the third special program is used for displaying a preset interface comprising date, weather and background pictures, and the fourth special program is a maintenance program.
7. The method for automatically opening and displaying a door phone according to claim 4, wherein the entry condition of the special program includes a program corresponding to a key time machine.
8. The automatic opening display method of door phone according to claim 1, wherein the processing of the temperature information and the humidity information comprises the steps of:
the controller receives analog signals collected by the temperature sensor and the humidity sensor, and the analog signals are sampled by the sampling circuit under the control of the controller switch array to generate sampled temperature and humidity signals;
the integrating circuit integrates the superposition part of the sampling signal and the feedback signal of the analog signal, and generates an output signal according to the integration result of the superposition part;
the comparator generates a digital signal according to the output signal, and outputs the digital signal to the analog-to-digital converter and the digital filter to obtain digital signals of the temperature sensor and the humidity sensor.
9. The automatic opening display method of the door phone according to claim 1, wherein the process of outputting the brightness and contrast of the liquid crystal screen backlight source according to the temperature and humidity digital signals comprises the following steps:
the controller receives digital signals of the temperature sensor and the humidity sensor, inputs the digital signals into the comparator, and prestores digital signals corresponding to the brightness and the contrast of the backlight source of the liquid crystal display in the comparator;
the comparator outputs a first comparison result of the digital signal of the temperature sensor, and the controller adjusts the brightness of the backlight source of the liquid crystal display according to the first comparison result;
the comparator outputs a second comparison result of the digital signal of the humidity sensor, and the controller adjusts the contrast of the backlight source of the liquid crystal display according to the second comparison result;
and feeding back the brightness and contrast of the backlight source of the liquid crystal display to the controller, storing and judging whether the brightness and contrast are consistent with the first contrast result and the second contrast result or not by the controller, and if not, re-comparing the digital signal by the comparator.
10. The automatic opening display method of the door phone according to claim 1, wherein the processing procedure of the controller to the key comprises the following steps:
when the controller receives an instruction corresponding to the key, analyzing a key value corresponding to the instruction, wherein the key value corresponds to a key value of the scientific calculator, and when the key is pressed, the key value corresponding to the key instruction is in an activated state;
judging whether a preset key value corresponding to the key value exists in the controller or not;
executing a program corresponding to the key instruction if the preset key value exists;
and if the preset key value does not exist, discarding the key instruction to prompt the re-input.
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| JP2000035564A (en) * | 1998-07-17 | 2000-02-02 | Maspro Denkoh Corp | Brightness correction device of liquid crystal display |
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| CN105245839A (en) * | 2015-09-30 | 2016-01-13 | 万科思自控信息（中国）有限公司 | Automatic opening display method for entrance machine |
| CN206628247U (en) * | 2017-04-12 | 2017-11-10 | 上海泰金电子科技有限公司 | A kind of doorway machine for showing building generic term for a building, e. g. Apartment, store, a movie theater, etc. code |
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2023
- 2023-04-11 CN CN202310417600.7A patent/CN116456050B/en active Active
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| JP2000035564A (en) * | 1998-07-17 | 2000-02-02 | Maspro Denkoh Corp | Brightness correction device of liquid crystal display |
| CN202485718U (en) * | 2012-02-14 | 2012-10-10 | 陕西理工学院 | Distributed environment temperature and humidity monitoring device |
| CN203260301U (en) * | 2013-02-07 | 2013-10-30 | 杭州银江智慧城市技术有限公司 | Automatic brightness control apparatus for LED display screen |
| CN105245839A (en) * | 2015-09-30 | 2016-01-13 | 万科思自控信息（中国）有限公司 | Automatic opening display method for entrance machine |
| CN206628247U (en) * | 2017-04-12 | 2017-11-10 | 上海泰金电子科技有限公司 | A kind of doorway machine for showing building generic term for a building, e. g. Apartment, store, a movie theater, etc. code |
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