CN108735137B - Circuit system for household appliance display screen and cooking appliance - Google Patents
Circuit system for household appliance display screen and cooking appliance Download PDFInfo
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- CN108735137B CN108735137B CN201810225488.6A CN201810225488A CN108735137B CN 108735137 B CN108735137 B CN 108735137B CN 201810225488 A CN201810225488 A CN 201810225488A CN 108735137 B CN108735137 B CN 108735137B
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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
Abstract
The invention provides a circuit system for a household appliance display screen and a cooking appliance, wherein the circuit system comprises: m × N display lamps arranged in a matrix; the M first switching tubes are respectively connected with M rows of display lamps in the M multiplied by N display lamps; the N second switch tubes are respectively connected with N rows of display lamps in the M multiplied by N display lamps; and the single chip microcomputer controls the states of the display lamps by controlling the states of the M first switching tubes and the states of the N second switching tubes, wherein M and N are positive integers. Therefore, the scanning mode adopted in the embodiment of the invention can meet the requirement of displaying the area blocks. Furthermore, a timing scanning mode can be used to enable the display effect to be more uniform, so that the region blocks can be uniformly displayed, that is, a plurality of lamps can be connected in parallel to display a certain region block.
Description
Technical Field
The invention relates to a circuit system for a household appliance display screen and a cooking appliance.
Background
In order to facilitate the operation of users, many current home appliances have display screens. The current display screen is mainly a digital screen, and the display effect of the digital screen is single, or is full bright, or is not bright, so that the display screen can not adapt to the diversified demands of consumers.
Disclosure of Invention
In this summary, concepts in a simplified form are introduced that are further described in the detailed description section. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
The invention provides a circuit system for a household appliance display screen, which comprises:
m × N display lamps arranged in a matrix;
the M first switching tubes are respectively connected with M rows of display lamps in the M multiplied by N display lamps;
the N second switch tubes are respectively connected with N rows of display lamps in the M multiplied by N display lamps;
the single chip microcomputer controls the states of the display lamps by controlling the states of the M first switching tubes and the states of the N second switching tubes,
wherein M and N are positive integers.
Illustratively, the single chip microcomputer controls the states of the M first switching tubes and the states of the N second switching tubes in a timing scanning mode, the period of the timing scanning is represented as T, wherein the period comprises M sections, the duration of each section is T/M,
the single chip microcomputer is used for the i-th section in the period: controlling the state of the ith first switch tube in the M first switch tubes to be a first state, controlling the states of the rest first switch tubes to be second states, and controlling the on-off of the jth display lamp in the ith row by controlling the jth second switch tube in the N second switch tubes;
wherein, the value range of i is 1 to M, and the value range of j is 1 to N.
Illustratively, the first switch tube is an NPN-type triode, the second switch tube is a PNP-type triode, and the jth display lamp in the ith row is lit for one and only one cycle of every continuous K (i, j) cycles, where K (i, j) is a positive integer,
in the ith section of the lighting period, the single chip microcomputer controls the base electrode of the ith first switch tube to be at a high level, controls the base electrodes of the other first switch tubes to be at a low level, and controls the base electrode of the jth second switch tube to be at a low level so as to light the jth display lamp in the ith row.
Illustratively, the singlechip sets a variable I for the jth display lamp in the ith rowij，IijIs 0 and every time a cycle passes, IijValue of (A)Adding 1; i isijThe period of K (I, j) is the period of the lighting, and I is set to be in the period of the lightingijReset to 0.
Illustratively, K (i, j) ═ 1.
In another aspect, the present invention provides a cooking appliance comprising the circuitry of the above aspect or any example.
Therefore, the scanning mode can meet the requirement of displaying the region blocks. Furthermore, a timing scanning mode can be used to enable the display effect to be more uniform, so that the region blocks can be uniformly displayed, that is, a plurality of lamps can be connected in parallel to display a certain region block.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments, and it is obvious for those skilled in the art that other drawings can be obtained from the drawings without creative efforts. In the drawings, like reference characters generally refer to the same or similar parts.
FIG. 1 is a schematic diagram of circuitry for a home appliance display screen in accordance with an embodiment of the present invention;
fig. 2 is a schematic block diagram of a cooking appliance according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
Many household appliances print silk screen on the back of the panel of the interface, and cannot see the prompt of silk screen characters under the condition that the display lamp is not bright, so that the silk screen characters with proper brightness between full brightness and non-brightness are required to display the silk screen characters on the interface to prompt consumers and distinguish different states of the prompt of the full brightness characters. Generally, a single chip microcomputer is adopted for supplying power, and a plurality of lamps cannot be connected in parallel to uniformly display a silk screen area block with a certain area.
For example, the household appliance in the embodiment may be a cooking appliance, and the cooking appliance may be an electric cooker, an electric pressure cooker, a food processor, a soybean milk maker, an electric stewpan, or other electric heating appliance.
The cooking appliance may include a pot body and a lid. The cooker body can be provided with an inner pot containing part in a cylindrical shape (or other shapes), and the inner pot can be freely put into or taken out of the inner pot containing part so as to be convenient for cleaning the inner pot. The inner pot is generally made of a metal material and has a circular opening on an upper surface for containing a material to be heated, such as rice, soup, etc.
It can be understood that the inner pot and the inner pot receiving part of the pot body have corresponding shapes. For example, the inner pan comprises a body of revolution formed by a pan wall with an upper opening and an inner cavity, the body of revolution having a shape comprising the pan wall and a pan rim attached to the upper part of the pan body (disposed along the entire circumference of the pan body). The capacity of the inner pot is usually below 6 liters (L), for example, the capacity of the inner pot can be 2L or 4L.
The cover body is connected to the cooker body in an openable and closable manner and is used for covering the cooker body. When the cover body is covered on the cooker body, a cooking space is formed between the cover body and the inner pot. Optionally, the lid body may include an upper cover and a removable cover disposed between the upper cover and the pot body and detachably connected to the upper cover to facilitate cleaning of the removable cover at any time.
The pot body may further include a heating means for heating the inner pot. In addition, the cooking appliance may further include a temperature sensor configured to measure a temperature value in the cooking space. For example, the cooking appliance may comprise a bottom temperature sensor for sensing a bottom temperature of the inner pot and/or a top temperature sensor for sensing a top temperature of the inner pot. Wherein the top temperature sensor may be provided in the cover. The bottom temperature sensor and the top temperature sensor may be thermistors. Bottom temperature sensor and top temperature sensor all are connected to cooking utensil's controlling means to after the temperature of pot in the sensing feeds back the temperature signal that senses to controlling means, thereby controlling means can realize more accurate control to the process of culinary art based on temperature signal. Wherein, when the inner pot is arranged in the inner pot accommodating part of the cooker body, the bottom temperature sensor can sense the temperature of the bottom wall of the inner pot, for example, the bottom temperature sensor can be directly or indirectly contacted with the bottom wall.
In addition, the cooker body can also comprise a power panel, and a display panel can be arranged on the cooker body. The power panel can be used for supplying power for a display panel, a control device and the like.
Fig. 1 is a schematic diagram of a circuit system for a home appliance display screen according to an embodiment of the present invention. The circuit system 10 includes: the display device comprises M multiplied by N display lamps, M first switch tubes, N second switch tubes and a single chip microcomputer (not shown in figure 1). M and N are positive integers, that is, M is more than or equal to 1, and N is more than or equal to 1. Also, the circuitry is directly powered by VCC.
Wherein, the M × N display lamps may be arranged in an M × N matrix. The M first switching tubes may be M common port (COM) ports, shown in fig. 1 as COM1, COM2, COM3 … COMm. The N second switching tubes may be N scan-end (SEG) ports, shown in fig. 1 as SEG1, SEG2 … SEGn. The M × N display lamps may be referred to in a matrix representation, and Aij represents the jth display lamp in the ith row.
M first switch tubes are respectively connected with M rows of display lamps in the M multiplied by N display lamps. The N second switch tubes are respectively connected with N rows of display lamps in the M multiplied by N display lamps. The single chip microcomputer controls the states of the display lamps by controlling the states of the M first switch tubes and the states of the N second switch tubes.
Specifically, the singlechip controls the on/off of the M × N display lamps by controlling the states of the M first switching tubes and the states of the N second switching tubes.
Illustratively, the first and second switching tubes may be triodes, such as Insulated Gate Bipolar Transistors (IGBTs), having a base (B), a collector (C), and an emitter (E). The base (B) may also be referred to as gate (G) or gate (G), the collector (C) may also be referred to as source (D), and the emitter (E) may also be referred to as drain (S). As an implementation manner, as shown in fig. 1, the first switching tube may be an NPN-type transistor, and the second switching tube may be a PNP-type transistor.
In the embodiment of the invention, a common IO port of a single chip microcomputer is used and respectively connected with M first switching tubes (COM 1-COMM) and N second switching tubes (SEG 1-SEGn). The singlechip adopts a scanning mode, and corresponding levels are respectively given to SEG 1-SEGn and COM 1-COMm, so that corresponding lamps can be turned on.
Illustratively, the single chip microcomputer controls the states of M first switching tubes (namely COM 1-COMm) and N second switching tubes (SEG 1-SEGn) in a timing scanning mode. If the period of the timing scanning is represented as T, the period comprises M sections, and the duration of each section is T/M. Then, the single chip may be used in the i-th segment of the cycle: and controlling the ith first switch tube in the M first switch tubes to be in a first state, controlling the rest first switch tubes to be in a second state, and controlling the jth display lamp in the ith row to be on or off by controlling the jth second switch tube in the N second switch tubes. Wherein, the value range of i is 1 to M, and the value range of j is 1 to N.
As an implementation manner, the first switch tube is an NPN type triode, the state of the first switch tube is a level state of a base of the NPN type triode, the first state is that the base of the NPN type triode is a high level, and the second state is that the base of the NPN type triode is a low level. Similarly, the second switch tube is a PNP type triode, and the state of the second switch tube is the level state of the base of the PNP type triode.
Referring to FIG. 1, a period T includes M segments of time T/M. In the first T/M time, the B pole of the triode of the COM1 port is controlled by the single chip microcomputer to be set to be at a high level, and the B pole of the triode of the COM 2-COMm port is set to be at a low level. Then, the level state of the B pole of the triode of the SEG 1-SEGn port can be controlled to control the on and off of the display lamp of the first row. The transistor B of the SEGj port may be set low to light the display lamp A1 j. That is, any lamp from a11 to A1n may be lit as needed, and only the B electrode of the transistor at the corresponding port of the SEG1 to SEGn needs to be set to a low level, and the other ports need to be set to a high level. Similarly, in the second T/M time, the B pole of the triode of the COM2 port is controlled to be at high level by the singlechip, and the B poles of the triodes of the COM1, COM 3-COMm ports are controlled to be at low level. To light any lamp from A21 to A2n, the B pole of the triode of the corresponding port of the SEG1 to SEGn is set to be low level, and the other ports are set to be high level. …, in the Mth T/M time, the B pole of the triode at COMm port is controlled by the single chip to be set to be high level, and the B pole of the triode at COM 1-COMm-1 port is set to be low level. To light any lamp of Am 1-Amn, the B pole of the triode of the corresponding port of SEG 1-SEGn is set to be low level, and the other ports are set to be high level. Thus, any of the M × N display lamps can be lit over one cycle.
Therefore, according to the embodiment of the invention, the VCC is adopted for direct power supply, and the triode is used as the switching tube, so that high-current power supply can be carried out. Moreover, the scanning method can satisfy the display of the region block. Furthermore, a timing scanning mode can be used to enable the display effect to be more uniform, so that the region blocks can be uniformly displayed, that is, a plurality of lamps can be connected in parallel to display a certain region block.
Illustratively, the single chip microcomputer can control the states of the M first switching tubes and the states of the N second switching tubes, so that the jth display lamp in the ith row is lighted in one and only one cycle of every continuous K (i, j) cycles, wherein K (i, j) is a positive integer, namely K (i, j) ≧ 1.
Wherein, K (i, j) corresponding to different i and/or different j may be equal or unequal, that is, for i1 ≠ i2 and/or j1 ≠ j2, K (i1, j1) ═ K (i2, j2) or K (i1, j1) ≠ K (i2, j 2).
Specifically, in the ith period of the lighting period, the single chip microcomputer controls the base of the ith first switching tube to be at a high level, controls the bases of the other first switching tubes to be at a low level, and controls the base of the jth second switching tube to be at a low level to light the jth display lamp in the ith row.
That is, for the display lamp Aij, when the B-pole of the transistor at the COMi port is set to the high level, the B-pole of the transistor at the SEGj port is set to the low level only once every K (i, j) cycles, and the rest of the cycles are set to the high level.
As an implementation mode, the singlechip can set a variable I for the jth display lamp in the ith rowij，IijIs 0 and every time a cycle passes, IijAdding 1 to the value of (c); i isijThe period K (I, j) is a period of lighting, and I is set to be in the lighting periodijReset to 0.
Wherein, the variable IijMay be an accumulator provided for the display lamp Aij, and the constant K (i, j) represents the luminance of the display lamp Aij. The variable I may be varied after each scan cycleijAdd 1 until the display light Aij is lit at K (I, j), and apply the variable IijAnd (6) clearing. It can be understood that the larger K (i, j), the longer the period between the lighting of the corresponding display lamp Aij, the smaller (darker) the brightness of the lamp is; conversely, the smaller K (i, j), the larger (brighter) the luminance of the corresponding display lamp Aij. The brightness adjustment of the display lamp can be realized, so that the brightness state effect of the display lamp is richer.
In addition, it is understood that if the brightness does not need to be adjusted, K (i, j) may be set to 1 for all the display lamps. In this case, full on or full off of all the display lamps can be realized.
Based on the description of the above embodiments, it can be known that the single chip microcomputer in the embodiments of the present invention adopts a scanning mode, controls on/off of the display lamp by controlling the first switching tube and the second switching tube, and can arbitrarily adjust the brightness according to the scanning frequency. Specifically, any brightness of each display lamp can be set at will to meet different requirements; the VCC power supply and the triode are used as a switching tube, so that the high-current power supply can be realized, and a plurality of lamps can be connected in parallel to display a certain area block; can set up the luminance of each lamp in a flexible way, can also do the breathing lamp effect, need not to adopt PWM (Pulse Width Modulation) mouth drive to do this effect specially, reduce the cost.
Fig. 2 is a schematic block diagram of a cooking appliance according to an embodiment of the present invention. The cooking appliance 20 shown in fig. 2 may include the circuitry 10, the circuitry 10 being as shown in the previous embodiments.
Wherein, the cooking utensil 20 may be an electric cooker, an electric pressure cooker, a food processor, a soymilk maker, an electric stewpan, or other electric heating utensil, which is not limited in the present invention.
It is understood that the circuit system 10 shown in fig. 1 can also be applied to other household appliances besides cooking appliances, and the invention is not limited thereto.
Therefore, according to the embodiment of the invention, the VCC is adopted for direct power supply, and the triode is used as the switching tube, so that high-current power supply can be carried out. Moreover, the scanning method can satisfy the display of the region block. Furthermore, a timing scanning mode can be used to enable the display effect to be more uniform, so that the region blocks can be uniformly displayed, that is, a plurality of lamps can be connected in parallel to display a certain region block.
It will be appreciated by those skilled in the art that the foregoing is only an embodiment of the present invention, and the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily made by those skilled in the art within the technical scope of the present invention will be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. A circuit system for a display screen of an appliance, comprising:
m × N display lamps arranged in a matrix;
the M first switching tubes are respectively connected with M rows of display lamps in the M multiplied by N display lamps;
the N second switch tubes are respectively connected with N rows of display lamps in the M multiplied by N display lamps;
a single chip microcomputer for controlling the states of the display lamps by controlling the states of the M first switching tubes and the states of the N second switching tubes, and
setting a constant K (i, j) to the jth display lamp in the ith row, wherein the constant K (i, j) represents the brightness of the jth display lamp in the ith row, so that the jth display lamp in the ith row is lighted in one and only one cycle in each continuous K (i, j) cycles,
the singlechip displays for the jth display in the ith rowLamp setting variable IijSaid variable IijIs 0, and every time a cycle passes, the variable IijAdding 1 to the value of (c); the variable IijThe period when K (I, j) is the period of the lighting, and the variable I is set to the period of the lightingijReset to 0 to realize brightness adjustment of the display lamp,
wherein M and N are positive integers, i ranges from 1 to M, j ranges from 1 to N, and K (i, j) is a positive integer.
2. The circuit system according to claim 1, wherein the single chip microcomputer controls the states of the M first switching tubes and the states of the N second switching tubes in a timing scanning mode, the period of the timing scanning is represented as T, wherein the period comprises M sections, the duration of each section is T/M,
the single chip microcomputer is used for the i-th section in the period: and controlling the ith first switch tube in the M first switch tubes to be in a first state, controlling the rest first switch tubes to be in a second state, and controlling the jth display lamp in the ith row to be on or off by controlling the jth second switch tube in the N second switch tubes.
3. The circuit system of claim 2, wherein the first switch transistor is an NPN transistor, the second switch transistor is a PNP transistor,
in the ith section of the lighting period, the single chip microcomputer controls the base electrode of the ith first switch tube to be at a high level, controls the base electrodes of the other first switch tubes to be at a low level, and controls the base electrode of the jth second switch tube to be at a low level so as to light the jth display lamp in the ith row.
4. The circuitry of claim 3, wherein K (i, j) ═ 1.
5. A cooking appliance comprising the circuitry of any one of claims 1 to 4.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720657058 | 2017-06-07 | ||
| CN2017206570582 | 2017-06-07 |
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| CN108735137A CN108735137A (en) | 2018-11-02 |
| CN108735137B true CN108735137B (en) | 2022-03-22 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4021333C1 (en) * | 1990-07-04 | 1991-11-07 | Telenorma Gmbh, 6000 Frankfurt, De | |
| MY124036A (en) * | 1999-07-08 | 2006-06-30 | Nichia Corp | Image display apparatus and its method of operation |
| CN101901570B (en) * | 2010-08-11 | 2012-10-17 | 福建泰德光电科技有限公司 | LED display screen module |
| CN202383980U (en) * | 2011-12-05 | 2012-08-15 | 杭州士兰控股有限公司 | LED display system for eliminating LED dynamic display ghost |
| CN102723055B (en) * | 2012-06-01 | 2015-06-24 | 深圳市明微电子股份有限公司 | LED display panel, system and equipment |
| CN102723056B (en) * | 2012-06-01 | 2015-11-25 | 深圳市明微电子股份有限公司 | A kind of LED display panel driving method, device, display system and equipment |
| CN206563891U (en) * | 2017-03-10 | 2017-10-17 | 浙江绍兴苏泊尔生活电器有限公司 | Cooking utensil |
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