CN112509504A - Method for preventing display screen from being lighted mistakenly, induction system of display screen and electric appliance - Google Patents
Method for preventing display screen from being lighted mistakenly, induction system of display screen and electric appliance Download PDFInfo
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- CN112509504A CN112509504A CN202011468689.2A CN202011468689A CN112509504A CN 112509504 A CN112509504 A CN 112509504A CN 202011468689 A CN202011468689 A CN 202011468689A CN 112509504 A CN112509504 A CN 112509504A
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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
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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
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
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Abstract
The invention discloses a method for preventing a display screen from being lighted by mistake, a sensing system of the display screen and an electric appliance. The method for avoiding the display screen from being lighted mistakenly comprises the following steps: when a human body near the display screen is sensed, monitoring the distance between the human body and the display screen; if the distance between the human body and the display screen is smaller than or equal to the preset distance, timing is started; before the timing time reaches the delay time, if the human body sensing signal is interrupted or the distance between the human body and the display screen is monitored to be greater than the preset distance, resetting the timer; and when the timing time reaches the delay time, lightening the display screen. The invention can prevent the display screen from being frequently lightened unintentionally when the user does not intend to operate the corresponding display screen when passing through the display screen, prolongs the service life of the display screen and saves the power consumption.
Description
Technical Field
The invention relates to a human body induction control technology, in particular to a method for preventing a display screen from being lighted by mistake under the condition of unintentional drawing, an induction system for realizing the method and an electric appliance adopting the corresponding display screen and the induction system.
Background
At present, a plurality of electric appliances adopt a human body induction system, and the electric appliances are automatically started through the human body induction system. Meanwhile, many current electrical appliances are equipped with a display screen, and taking a refrigerator as an example, the refrigerator is composed of a door body, a box body, a control system (such as a compressor, a controller, a protector, a fan and the like), a refrigeration system (such as an evaporator, a condenser, a capillary tube, a filter and the like) and various interior parts (including various drawers, glass partition plates and the like). Along with the continuous improvement of people's standard of living, more and more refrigerator products use the good and more convenient function of use, operation of man-machine interaction form, if: touch LCD displays, human body sensing, cameras, etc.
At present, many refrigerator displays are convenient for people to operate, all have human body induction system, can realize following effect through human body induction system: when a person approaches the display of the refrigerator, the display can be immediately lightened, so that a user can conveniently perform related operations; after the operation is finished, the display will automatically turn off after a period of time (as shown in fig. 1).
The human body induction system matched with the display has the following problems: the refrigerators are generally placed in living rooms, kitchens, passageways and other places, so that people can conveniently take and place articles into and out of the refrigerators, but the places where the refrigerators are placed are all areas where people often move. When a person walks away from the display of the refrigerator, even if the person does not intend to operate, the person often triggers the response of the human body induction module, so that the display is lightened and is turned off after being continuously lightened for a period of time. This unintentional passage causes the display to be lit undesirably, which increases the power consumption of the user and affects the life of the display.
Therefore, how to provide a method for preventing the human body sensing display screen from being lighted unintentionally is an urgent technical problem in the industry.
Disclosure of Invention
In order to solve the technical problem that the display screen is frequently lightened by human body induction under the condition of unintentional drawing in the prior art, the invention provides a method for preventing the display screen from being lightened by mistake, an induction system of the display screen and an electric appliance.
The method for avoiding the display screen from being lighted by mistake comprises the following steps:
when a human body near the display screen is sensed, monitoring the distance between the human body and the display screen;
if the distance between the human body and the display screen is smaller than or equal to a preset distance, timing is started;
before the timing time reaches the delay time, if the human body sensing signal is interrupted or the distance between the human body and the display screen is monitored to be larger than the preset distance, resetting the timer;
and when the timing time reaches the delay time, lightening a display screen.
Further, the delay time is calculated according to a formula 2R sin (θ/2)/V, where R is a maximum effective radius at which the display screen is located and the human body can be sensed, θ is an angle at which the display screen is located and the human body can be sensed, and V is a walking speed of the human body.
Further, the distance between the human body and the display screen is calculated according to the time from the sending to the receiving of the human body induction signal and the transmission rate of the human body induction signal.
The invention provides a sensing system of a display screen, which comprises:
the human body induction module is used for inducing a human body near the display screen;
the timing module is used for timing when the distance between the human body and the display screen is smaller than or equal to a preset distance;
and the control module is used for controlling the human body induction module to send a human body induction signal, calculating the distance between a human body and the display screen, controlling the timing module according to the distance and controlling the display screen to be lightened according to the timing result of the timing module or the distance.
Further, the control module includes:
the instruction sending unit is used for sending corresponding instructions to the human body induction module, the timing module and the display screen;
the calculation processing unit is used for calculating the distance between the human body and the display screen according to the sending and receiving time of the human body induction signal;
the first judgment unit is used for comparing the distance obtained by the calculation processing unit with a preset distance and sending a first signal to the instruction sending unit when the distance between the human body and the display screen is smaller than or equal to the preset distance; when the human body sensing signal is interrupted or the distance between the human body and the display screen is monitored to be larger than the preset distance, a second signal is sent to the instruction sending unit;
the second judgment unit compares the timing time of the timing module with the delay time, and sends a second signal to the instruction sending unit when the timing time reaches the delay time;
and the second judging unit compares the timing time of the timing module with the delay time, and when the timing time reaches the delay time, the second judging unit wants the instruction sending unit to send a second signal.
Further, the human body induction module is an infrared receiving device and an infrared transmitting device.
Further, the human body induction module is a pyroelectric infrared sensor.
The electric appliance provided by the invention comprises a display screen and the induction system of the display screen in the technical scheme.
Further, the appliances include, but are not limited to, refrigerators and cabinet air conditioners.
The invention designs a maximum delay time and cooperates with the monitoring of the distance between the human body and the display screen, thereby avoiding the refrigerator from being frequently and unintentionally lightened, saving the power consumption of users and greatly prolonging the service life of the display screen.
Drawings
The invention is described in detail below with reference to examples and figures, in which:
fig. 1 is a flowchart of lighting control of a display screen according to the related art.
Fig. 2 is a flowchart of the lighting control of the display panel of the present invention.
Fig. 3 is a schematic diagram of the calculation of the delay time of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Thus, a feature indicated in this specification will serve to explain one of the features of one embodiment of the invention, and does not imply that every embodiment of the invention must have the stated feature. Further, it should be noted that this specification describes many features. Although some features may be combined to show a possible system design, these features may also be used in other combinations not explicitly described. Thus, the combinations illustrated are not intended to be limiting unless otherwise specified.
The principles of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in fig. 2, the method for preventing the display screen from being lighted by mistake of the present invention is based on the principle of human body sensing.
At present, there are two types of sensors commonly used in sensing systems for display screens: one is an infrared transmitting device combined with an infrared receiving device. The infrared transmitting device emits an infrared signal (i.e., a human body induction signal). When the infrared signal meets the human body, the infrared signal is reflected to the infrared receiving device. After the infrared receiving device receives the infrared signal, the infrared receiving device informs the control module, the control module sends a display screen lightening instruction, and the display screen is lightened. When the person leaves, the display screen is extinguished after a period of time. The other is a pyroelectric infrared sensor, and the wavelength of infrared rays released by the pyroelectric infrared sensor is constant due to the constant body temperature of a human body. When the pyroelectric infrared sensor receives infrared rays released by a human body, the infrared sensor informs the control module, the control module sends a display screen lightening instruction, and the display screen is lightened.
As described in the background art, some electrical appliances are placed in areas where people often move, such as refrigerators, cabinet air conditioners, etc., and when people move, the display screens of the electrical appliances are inadvertently lighted, which causes unnecessary power consumption and affects the service life of the display screens. Therefore, in one embodiment of the present invention, when an electrical appliance includes a display screen and a sensing system for sensing and lighting the display screen, the sensing system senses a human body near the display screen, monitors a distance between the human body and the display screen, starts timing once the distance between the human body and the display screen is less than or equal to a preset distance, and lights the display screen when the timing time reaches a delay time. Before the timing time reaches the delay time, if the human body sensing signal is interrupted or the distance between the human body and the display screen is monitored to be larger than the preset distance, the timer is reset, and the display screen is prevented from being accidentally lightened by matching the distance with the delay time.
As shown in fig. 3, the setting of the delay time of the present invention is an important factor affecting the user experience. If the set delay time is long, people can feel that the reaction of the electric appliance is slow, and the human-computer interaction is poor; if the delay time is set too short, it does not have the effect of reducing the frequency of unintended lighting of the display. It is assumed that an infrared transmitting device and an infrared receiving device are used to sense a human body. If the transmitting and receiving angles of the infrared transmitting and receiving devices are theta degrees, the effective maximum radius of the designed induction human body is R cm, and the maximum effective area of the human body induction is a sector area shown in figure 3. If the person walks from point B to point a in fig. 3, T = S/V =2 × R × sin (θ/2)/V, V is the walking speed of the human body, and the walking speed of the person is usually about 100cm/S to 120cm/S, and if calculated at 120cm/S, T = S/V =2 × R × sin (θ/2)/120, i.e., the time taken for the person to walk through the screen is about T. Therefore, the invention adopts the time delay of T seconds, and can avoid the error lighting of the display caused by the walking of people. Although the activities of people are irregular, the walking speed is not definite, the lighting times of the display screen can be reduced by increasing the time delay, and the purposes of reducing the power consumption and prolonging the service life of the display screen are achieved.
The effective maximum radius R for sensing the human body is not a detectable radius of the sensor, but a value set according to the actual situation in the present invention, and if the detectable radius is R1, the value of the effective maximum radius R is within a range of R1 or less. The value of the effective maximum radius R is also important, and if the value is set to be too large, the problem that the display screen is frequently lightened cannot be effectively avoided; too close, the user experience is poor. The distance is generally based on the maximum distance that the user can operate the display, and when a person enters the area, the distance is considered to be effective, and timing is started; when the person leaves the area, the distance is considered invalid and the timer is cleared.
The invention increases the time delay of the display screen lighting, and does not influence the use of users. Because the display screen is provided with the touch keys besides the induction lightening, even if the walking speed of a human body is slightly high at a certain time and the human body arrives in T s, the distance between the human body and the display screen is monitored in real time, the display screen can be lightened before the human body arrives, and even if the walking speed of the human body is too high, the distance cannot be monitored in time, and the display is not lightened at the moment, a user can lighten the display in a hand touch mode and carry out related operation.
The distance between the human body and the display screen is calculated according to the time from sending to receiving of the human body sensing signal and the transmission rate V1 of the human body sensing signal, for example, the time of sending the infrared signal is T1, the time of receiving the infrared signal returned from the human body is T2, and the approximate distance between the human body and the display screen can be obtained through (T2-T1) × V1/2.
The invention also protects the induction system of the display screen to realize the method. The reaction system of the display screen comprises three parts, namely a human body induction module, a timing module and a control module, wherein the control module can utilize the control module of an electric appliance and can also be a control module for independently controlling the induction system.
The human body sensing module is used for sensing a human body near the display screen, and includes, but is not limited to, the above-described infrared transmitting and receiving device and the pyroelectric infrared sensor. The timing module is used for timing when the distance between the human body and the display screen is smaller than or equal to a preset distance. The control module controls the human body sensing module to send a human body sensing signal, calculates the distance between a human body and the display screen, controls the timing module according to the distance, and controls the display screen to be lightened according to the timing result or the distance of the timing module.
In a specific embodiment, the control module specifically includes an instruction sending unit, a calculation processing unit, a first judging unit and a second judging unit, wherein the instruction sending module is used for controlling the human body induction module to send out an induction signal, and receiving signals of other units to send corresponding instructions to the timing module and the display screen. And the calculation processing unit calculates the distance between the human body and the display screen according to the sending and receiving time of the human body induction signal. The first judging unit compares the distance obtained by the calculating and processing unit with a preset distance, when the distance between a human body and the display screen is smaller than or equal to the preset distance, a first signal is sent to the instruction sending unit, the instruction sending unit sends a corresponding instruction to the timing module after receiving the first signal, the timing module starts timing after receiving the instruction, when the distance between the human body and the display screen is larger than the preset distance or the human body sensing signal is interrupted, the first judging unit sends a second signal to the instruction sending unit, the instruction sending unit sends the corresponding instruction to the timing module after receiving the second signal, and the timing module clears timing time. The second judging unit compares the timing time of the timing module with the delay time, and sends a third signal to the instruction sending unit when the timing time reaches the delay time, and at the moment, the instruction sending unit sends a corresponding instruction to the display screen after receiving the third signal, so that the display screen is lightened.
The invention also protects the electric appliances adopting the induction system, which are provided with touch display screens, and the corresponding induction systems, including but not limited to the refrigerator and the cabinet air conditioner listed above.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. A method for preventing a display screen from being erroneously lit, comprising:
when a human body near the display screen is sensed, monitoring the distance between the human body and the display screen;
if the distance between the human body and the display screen is smaller than or equal to a preset distance, timing is started;
before the timing time reaches the delay time, if the human body sensing signal is interrupted or the distance between the human body and the display screen is monitored to be larger than the preset distance, resetting the timer;
and when the timing time reaches the delay time, lightening a display screen.
2. The method according to claim 1, wherein the delay time is calculated according to a formula 2 x R x sin (θ/2)/V, where R is a maximum effective radius at which a human body can be sensed with a position of the display screen as an origin, θ is an angle at which a human body can be sensed with the position of the display screen as the origin, and V is a walking speed of the human body.
3. The method for preventing the display screen from being lighted by mistake as claimed in claim 1, wherein the distance between the human body and the display screen is calculated by the time from the sending to the receiving of the human body induction signal and the transmission rate of the human body induction signal.
4. A sensing system for a display screen, comprising:
the human body induction module is used for inducing a human body near the display screen;
the timing module is used for timing when the distance between the human body and the display screen is smaller than or equal to a preset distance;
and the control module is used for controlling the human body induction module to send a human body induction signal, calculating the distance between a human body and the display screen, controlling the timing module according to the distance and controlling the display screen to be lightened according to the timing result of the timing module.
5. The display screen sensing system of claim 4, wherein the human body sensing module is an infrared receiving device and an infrared transmitting device.
6. The display screen sensing system of claim 4, wherein the control module comprises:
the instruction sending unit is used for sending corresponding instructions to the human body induction module, the timing module and the display screen;
the calculation processing unit is used for calculating the distance between the human body and the display screen according to the sending and receiving time of the human body induction signal;
the first judgment unit is used for comparing the distance obtained by the calculation processing unit with a preset distance and sending a first signal to the instruction sending unit when the distance between the human body and the display screen is smaller than or equal to the preset distance; when the human body sensing signal is interrupted or the distance between the human body and the display screen is monitored to be larger than the preset distance, a second signal is sent to the instruction sending unit;
and the second judging unit is used for comparing the timing time of the timing module with the delay time and sending a second signal to the instruction sending unit when the timing time reaches the delay time.
7. The sensing system of claim 4, wherein the human body sensing module is a pyroelectric infrared sensor.
8. An electrical appliance comprising a display screen, characterized in that it further comprises a sensing system for a display screen according to any one of claims 4 to 7.
9. The appliance of claim 8, wherein the appliance comprises a refrigerator and a cabinet air conditioner.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011468689.2A CN112509504B (en) | 2020-12-14 | 2020-12-14 | Method for preventing display screen from being lighted mistakenly, induction system of display screen and electric appliance |
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| CN202011468689.2A CN112509504B (en) | 2020-12-14 | 2020-12-14 | Method for preventing display screen from being lighted mistakenly, induction system of display screen and electric appliance |
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| CN112509504A true CN112509504A (en) | 2021-03-16 |
| CN112509504B CN112509504B (en) | 2022-04-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113074487A (en) * | 2021-04-30 | 2021-07-06 | 青岛海尔电冰箱有限公司 | Refrigerator and control method thereof |
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