CN210325156U - Display circuit, display device and display equipment - Google Patents
Display circuit, display device and display equipment Download PDFInfo
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- CN210325156U CN210325156U CN201921726621.2U CN201921726621U CN210325156U CN 210325156 U CN210325156 U CN 210325156U CN 201921726621 U CN201921726621 U CN 201921726621U CN 210325156 U CN210325156 U CN 210325156U
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Abstract
The application relates to a display circuit, a display device and a display device. The display circuit includes: the display device comprises a current limiting unit, a first electrode driving control end, a plurality of second electrode driving control ends and a plurality of display units, wherein the first electrode driving control end is an anode driving control end/a cathode driving control end, and the second electrode driving control end is a cathode driving control end/an anode driving control end; one end of each display unit is connected with the first electrode driving control end through the current limiting unit, and the other end of each display unit is respectively connected with the corresponding second electrode driving control end. By adopting the method and the device, the display reliability can be ensured, and the using number of the current limiting units is reduced, so that the board distribution space is effectively reduced, and the pressure of circuit layout is reduced.
Description
Technical Field
The present disclosure relates to electronic technologies, and particularly to a display circuit, a display device and a display apparatus.
Background
In a display device, a structure in which display electronic components of a plurality of branches are connected in parallel is commonly used, for example, a Light Emitting Diode (LED) is used in parallel. In order to ensure that a certain display electronic component in the parallel branches can normally display when damaged, a current-limiting resistor is generally separately configured for each branch. Therefore, when the number of the branch circuits is large, a large number of current-limiting resistors are needed, the board distribution space is occupied, and the pressure of circuit layout is increased.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is desirable to provide a display circuit, a display device, and a display apparatus that enhance display reliability and reduce the pressure on the wiring layout.
A display circuit, comprising: the display device comprises a current limiting unit, a first electrode driving control end, a plurality of second electrode driving control ends and a plurality of display units, wherein the first electrode driving control end is an anode driving control end/a cathode driving control end, and the second electrode driving control end is a cathode driving control end/an anode driving control end;
one end of each display unit is connected with the first electrode driving control end through the current limiting unit, and the other end of each display unit is respectively connected with the corresponding second electrode driving control end.
A display device comprises a control unit and the display circuit, wherein the control unit is connected with the first electrode driving control end and the second electrode driving control end.
A display device comprises a device body and the display device, wherein the display device is arranged on the device body.
According to the display circuit, the display device and the display equipment, the plurality of display units are connected with the current limiting unit, the current limiting unit is connected with the first electrode driving control end, so that the plurality of independent display units share the current limiting unit, and each display unit is respectively connected with the corresponding second electrode driving control end, so that the display driving can be respectively carried out on each display unit, the display among the display units cannot be influenced mutually, and the display reliability is ensured; moreover, under the condition that the display units do not influence each other, the plurality of display units share the current limiting unit, a current limiting unit does not need to be configured for a branch where each display unit is located, and the using number of the current limiting units is reduced, so that the board distribution space is effectively reduced, and the line layout pressure is reduced.
Drawings
FIG. 1 is a block diagram of a display circuit in one embodiment;
FIG. 2 is a circuit schematic of a display circuit in one embodiment;
fig. 3 is a circuit schematic of a display circuit in another embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further 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 present application and are not intended to limit the present application.
Referring to fig. 1, in one embodiment, there is provided a display circuit including: a first electrode driving control terminal COM, a plurality of second electrode driving control terminals SEG, a current limiting unit 130, and a plurality of display units 150. The first electrode drive control end COM is a drive control end of the first electrode, the second electrode drive control end SEG is a drive control end of the second electrode, and the first electrode and the second electrode are respectively one of a cathode and an anode; that is, the first electrode driving control terminal COM is an anode driving control terminal/cathode driving control terminal, and the second electrode driving control terminal SEG is a cathode driving control terminal/anode driving control terminal. For example, the first electrode driving control terminal COM is an anode driving control terminal, and correspondingly, the second electrode driving control terminal SEG is a cathode driving control terminal; or the first electrode driving control terminal COM is a cathode driving control terminal, and correspondingly, the second electrode driving control terminal SEG is an anode driving control terminal. Specifically, the first electrode driving control terminal COM and the second electrode driving control terminal SEG may be driving chips, or may be ports connected to an external driving circuit.
One end of each display unit 150 is connected to the first electrode driving control terminal COM through the current limiting unit 130, and the other end of each display unit 150 is connected to the corresponding second electrode driving control terminal SEG. Specifically, one display unit 150 is correspondingly connected to one second electrode driving control terminal SEG, and the second electrode driving control terminals SEG connected to different display units 150 are different. As shown in fig. 1, two display units 150 and two second electrode driving control terminals SEG are included, but fig. 1 is only a simple example, and it is understood that the number of display units 150 and second electrode driving control terminals SEG may be other. Specifically, the number of the second electrode driving control terminals SEG is the same as the number of the display units 150, and corresponds to one. It is understood that, in other embodiments, besides each display unit 150 is correspondingly connected to one second electrode driving control terminal SEG, several second electrode driving control terminals SEG may be provided as a spare, and the number of the second electrode driving control terminals SEG may also be greater than the number of the display units 150.
The current limiting unit 130 is a device that can limit the current of the line, and may include a current limiting resistor, for example. The display units 150 are not connected in parallel, and the common current limiting unit 130 limits the current to protect the operation of the display units 150. The level states of the first electrode driving control terminal COM and the second electrode driving control terminal SEG may be set, and a potential difference may be formed by setting the level states of the first electrode driving control terminal COM and the second electrode driving control terminal SEG, so that the display unit 150 connected between the first electrode driving control terminal COM and the second electrode driving control terminal SEG may be lit, and display driving of the display unit 150 may be achieved. For example, the first electrode driving control terminal COM and the second electrode driving control terminal SEG may be connected to a control unit, and the control unit controls the level states of the first electrode driving control terminal COM and the second electrode driving control terminal SEG.
In the display circuit, the plurality of display units 150 are connected with the current limiting unit 130, the current limiting unit 130 is connected with the first electrode driving control end COM, so that the independent display units 150 share the current limiting unit 130, and each display unit 150 is respectively connected with the corresponding second electrode driving control end SEG, so that the display driving can be respectively carried out on each display unit 150, the display among the display units 150 cannot be influenced mutually, and the display reliability is ensured; moreover, under the condition that the display units 150 do not affect the display, the plurality of display units 150 share the current limiting unit 130, and a current limiting unit 130 is not required to be configured for a branch where each display unit 150 is located, so that the number of the current limiting units 130 is reduced, the board distribution space is effectively reduced, and the line layout pressure is reduced.
Specifically, when the first electrode driving control terminal COM is an anode driving control terminal and the second electrode driving control terminal SEG is a cathode driving control terminal, the current limiting unit 130 is connected in series to the anode, and no more than one cathode driving control terminal is in a low level state in the same period of time, specifically, one of the cathode driving control terminals is set to be in a low level state, and the other cathode driving control terminals are in a high level state or a high impedance state; at this time, the anode driving control terminal forms a potential difference with the cathode driving control terminal in the low level state, and the display unit 150 connected to the cathode driving control terminal in the low level state can be lighted. Specifically, when the first electrode driving control terminal COM is a cathode driving control terminal and the second electrode driving control terminal SEG is an anode driving control terminal, the current limiting unit 130 is connected in series to the cathode, and no more than one anode driving control terminal is in a high level state in the same period of time, specifically, one of the anode driving control terminals is set to be in a high level state, and the other anode driving control terminals are in a low level state or a high impedance state; at this time, the cathode driving control terminal forms a potential difference with the anode driving control terminal in the high level state, and the display unit 150 connected to the anode driving control terminal in the high level state can be lighted.
In the display circuit, the forward voltage drops of the display units 150 may be different, for example, different LEDs are used, the forward voltage drops may be different, and if a potential difference is formed between the second electrode driving control terminals SEG and the first electrode driving control terminals COM at the same time, so that the plurality of display units 150 are driven at the same time, the brightness of the plurality of display units 150 may be inconsistent or some display units 150 may not be normally lighted. By forming a potential difference between no more than one second electrode driving control terminal SEG and the first electrode driving control terminal COM in the same time period and controlling the display by using the matrix scanning concept, it can be ensured that only no more than one display unit 150 among the plurality of display units 150 sharing the current limiting unit 130 can be lighted in the same time period, and the display units 150 with different forward voltage drops can be normally lighted.
In one embodiment, the current limiting unit 130 includes a plurality of current limiting components, and the display unit 150 includes a plurality of display components. One end of each display component in the same display unit 150 is connected to the first electrode driving control terminal COM through different current limiting components, and the other end of each display component in the same display unit 150 is connected to the same second electrode driving control terminal SEG. The first electrode driving control terminal COM is connected to one display element in the plurality of display units 150 through the same current limiting element; that is, the display components in the plurality of display units 150 may share one current limiting component.
Specifically, one display element in one display unit 150 and one display element in another display unit 150 may be connected to the first electrode driving control terminal COM through the same current limiting element. For example, the first display element of each display unit 150 is connected to the same current limiting element, the second display element of each display unit 150 is connected to the same current limiting element, the third display element of each display unit 150 is connected to the same current limiting element, and so on. It is understood that the number of display components contained within each display unit 150 may be the same or different; if the number of display elements included in each display unit 150 is different, some current limiting elements may not be connected to one display element in all display units 150.
Specifically, the number of the current limiting components is the same as that of the display components in one display unit 150, and each display component in one display unit 150 is connected to a corresponding current limiting component, for example, the first display component is connected to the first current limiting component, the second display component is connected to the second current limiting component, the third display component is connected to the third current limiting component, and so on. Specifically, the resistance values of the current limiting units may be the same or different, and may be specifically selected according to the brightness required to be displayed by the connected display module.
The display elements in the same display unit 150 share a second electrode driving control terminal SEG, and can be simultaneously lighted. By configuring a current limiting component for each display component in the same display unit 150, it is possible to avoid the situation that brightness is inconsistent or some display components cannot be lighted due to different forward voltage drops of the display components; meanwhile, the display components in different display units 150 share the current limiting component, so that the use of the current limiting component can be reduced, and the circuit layout pressure can be reduced. For example, when the display units 150 are N and each display unit 150 includes M display elements for multi-channel display, the total number of branches is N × M, and only M current limiting elements are needed to protect the display circuits of up to N × M different branches.
In particular, the display assembly may comprise one LED, or the display assembly may comprise a plurality of LEDs connected in series or in parallel. Specifically, the display assembly may include one LED or a plurality of LEDs connected in series or in parallel according to actual display requirements. For example, in one embodiment, as shown in FIG. 2, the display assembly includes one LED. It will be appreciated that in other embodiments, the display assembly may also include other types of display electronics.
Specifically, the current limiting component may include a current limiting resistor; or the current limiting component may comprise a plurality of current limiting resistors connected in series with the display component, that is, one current limiting component comprises a plurality of current limiting resistors connected in series. Specifically, the resistance value required for current limiting may be determined according to the display component to which the current limiting component is connected, and one current limiting resistor or a plurality of current limiting resistors connected in series may be selected according to the resistance value, so that the total resistance value of the current limiting component is equal to the resistance value required for current limiting. For example, in the embodiment shown in FIG. 2, the current limiting component comprises a current limiting resistor.
As shown in fig. 2, take two second electrode driving control terminals SEG, two display units 150, each display unit 150 including 6 display elements, current limiting unit 130 including 6 current limiting elements, display element including one LED, current limiting element including one current limiting resistor as an example; wherein, the first second electrode driving control end is SEG1, and the second electrode driving control end is SEG 2; the 6 display components in the first display unit are respectively an LED11, an LED12, an LED13, an LED14, an LED15 and an LED16, and the 6 display components in the second display unit are respectively an LED21, an LED22, an LED23, an LED24, an LED25 and an LED 26; the 6 current-limiting components are respectively a current-limiting resistor R1, a current-limiting resistor R2, a current-limiting resistor R3, a current-limiting resistor R4, a current-limiting resistor R5 and a current-limiting resistor R6. The LED11 and the LED21 form a group of display segments for non-parallel display, the common current limiting resistor R1, the LED12 and the LED22 form a group of display segments for non-parallel display, the common current limiting resistor R2, the LED13 and the LED23 form a group of display segments for non-parallel display, the common current limiting resistor R3, the LED14 and the LED24 form a group of display segments for non-parallel display, the common current limiting resistor R4, the LED15 and the LED25 form a group of display segments for non-parallel display, the common current limiting resistor R5, the LED16 and the LED26 form a group of display segments for non-parallel display, and the common current limiting resistor R6. The 6 current resistors control 6 groups of display segments displayed in non-parallel.
In one embodiment, the number of the first electrode driving control terminals COM is multiple, and one first electrode driving control terminal COM is connected with multiple current limiting components.
By adopting one first electrode drive control end COM to connect a plurality of current limiting components, the using number of the first electrode drive control end COM can be reduced, and the wiring pressure is further reduced. For example, as shown in fig. 2, the first electrode driving control terminal is COM1, and is connected to the current limiting resistor R1 and the current limiting resistor R2, the second first electrode driving control terminal is COM2, and is connected to the current limiting resistor R3 and the current limiting resistor R4, and the third first electrode driving control terminal is COM3, and is connected to the current limiting resistor R5 and the current limiting resistor R6. In fig. 2, the display segments displayed in parallel include LEDs 11 and 12, LEDs 13 and 14, LEDs 15 and 16, LEDs 21 and 22, LEDs 23 and 24, and LEDs 25 and 26.
In another embodiment, the number of the first electrode driving control terminals is multiple, and one first electrode driving control terminal is connected with one current limiting component. For example, as shown in fig. 3, the current limiting resistor R1 and the current limiting resistor R2 are respectively controlled by the first electrode driving control terminal COM1 and the second electrode driving control terminal COM2, and 6 current resistors are correspondingly connected to 6 first electrode driving control terminals.
In one embodiment, a display device is provided, which includes a control unit and the aforementioned display circuit, wherein the control unit is connected to the first electrode driving control terminal COM and the second electrode driving control terminal SEG.
The control unit is used for controlling the level states of the first electrode driving control end COM and the second electrode driving control end SEG. Specifically, the control unit may be a control circuit capable of changing a level at a position where the first electrode driving control terminal COM and the second electrode driving control terminal SEG are connected, or may be a control chip capable of outputting a low level or a high level to the first electrode driving control terminal COM and the second electrode driving control terminal SEG.
The display device adopts the display circuit, and can effectively reduce the board distribution space and reduce the pressure of circuit layout in the same way.
In one embodiment, a display device is provided, which includes a device body and the aforementioned display device, and the display device is disposed on the device body. The device body is a basic component of the display device, except for the display device, such as a frame for fixing the display device.
The display equipment adopts the display device, and can effectively reduce the board distribution space and reduce the pressure of circuit layout in the same way.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A display circuit, comprising: the display device comprises a current limiting unit, a first electrode driving control end, a plurality of second electrode driving control ends and a plurality of display units, wherein the first electrode driving control end is an anode driving control end/a cathode driving control end, and the second electrode driving control end is a cathode driving control end/an anode driving control end;
one end of each display unit is connected with the first electrode driving control end through the current limiting unit, and the other end of each display unit is respectively connected with the corresponding second electrode driving control end.
2. The display circuit of claim 1, wherein the display unit comprises a plurality of display components, and the current limiting unit comprises a plurality of current limiting components; one end of each display assembly in the same display unit is connected with the first electrode driving control end through different current limiting assemblies, and the other end of each display assembly in the same display unit is connected with the same second electrode driving control end; the first electrode driving control end is connected with one display component in the plurality of display units through the same current limiting component.
3. The display circuit of claim 2, wherein the number of the first electrode driving control terminals is plural, and one first electrode driving control terminal is connected to a plurality of current limiting components.
4. The display circuit of claim 2, wherein the number of the first electrode driving control terminals is plural, and one first electrode driving control terminal is connected to one current limiting component.
5. The display circuit of claim 2, wherein the display component comprises one LED, or wherein the display component comprises a plurality of LEDs connected in series or in parallel.
6. The display circuit of claim 2, wherein the current limiting component comprises a current limiting resistor, or wherein the current limiting component comprises a plurality of current limiting resistors connected in series with the display component.
7. A display device comprising a control unit and the display circuit of any one of claims 1 to 6, wherein the control unit is connected to the first electrode driving control terminal and the second electrode driving control terminal.
8. A display apparatus comprising an apparatus body and the display device according to claim 7, the display device being provided to the apparatus body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921726621.2U CN210325156U (en) | 2019-10-15 | 2019-10-15 | Display circuit, display device and display equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921726621.2U CN210325156U (en) | 2019-10-15 | 2019-10-15 | Display circuit, display device and display equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110675808A (en) * | 2019-10-15 | 2020-01-10 | 珠海格力电器股份有限公司 | Display circuit, display device and display equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110675808A (en) * | 2019-10-15 | 2020-01-10 | 珠海格力电器股份有限公司 | Display circuit, display device and display equipment |
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