Control circuit of display screen, mainboard and electronic equipment

Abstract

The embodiment of the utility model provides a control circuit of a display screen, a mainboard and electronic equipment, and belongs to the technical field of display screen control. The control circuit comprises a display screen connector which is provided with a first screen power supply pin and a second screen power supply pin; the switch module is connected with the power supply and the display screen connector, the switch module comprises a first switch and a second switch, the first switch is connected with the first screen power supply pin and the power supply, and the second switch is connected with the second screen power supply pin and the power supply; the processor is respectively connected with the display screen connector and the two switches; the processor can receive the control signal, send a switch-on instruction to one of the two switches to enable the power supply to supply power to the screen corresponding to the switch-on switch, and send a switch-off instruction to the other switch to enable the power supply to stop supplying power to the screen corresponding to the switch-off switch. The display screen control circuit can be respectively used for connecting an OLED screen and an LCD screen, and the test difficulty is simplified.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electronic equipment technical field especially relates to a display screen's control circuit, mainboard and electronic equipment. BACKGROUND

[0002] With the development of display technology and the pursuit of high-quality display effect of consumers, more and more notebook panels use OLED (Organic Light-Emitting Diode, also known as organic electroluminescent display) screens, but overall, the cost of OLED screens is much higher than that of LCD (Liquid Crystal Display, also known as liquid crystal display) screens. During the testing of OLED screens and LCD screens, due to the interface differences between OLED screens and LCD screens, the mainboard PCBA supporting OLED screens and LCD screens needs to be distinguished, thereby increasing the difficulty of testing and operation and maintenance. SUMMARY

[0003] In view of the above problems existing in the prior art, the purpose of the embodiments of the utility model is to provide a display screen control circuit, mainboard and electronic equipment. The display screen control circuit can be used to connect OLED screens and LCD screens respectively, simplifying the difficulty of testing.

[0004] The technical scheme adopted by the embodiments of the utility model is:

[0005] A display screen control circuit, comprising:

[0006] A display screen connector has a first screen power supply pin and a second screen power supply pin, the first screen power supply pin is used for electrical connection with a first screen, and the second screen power supply pin is used for electrical connection with a second screen;

[0007] A switch module is connected to a power supply and the display screen connector, the switch module includes a first switch and a second switch, the first switch is connected to the first screen power supply pin and the power supply, and the second switch is connected to the second screen power supply pin and the power supply;

[0008] A processor is connected to the display screen connector, the first switch and the second switch respectively; the processor can receive a control signal, send a conduction instruction to one of the first switch and the second switch to make the power supply supply power to the screen corresponding to the switch, and send a disconnection instruction to the other switch to make the power supply stop supplying power to the screen corresponding to the switch.

[0009] In some embodiments, the display screen connector further has a screen detection pin for electrical connection with the first screen or the second screen, and when the screen detection pin is connected with the first screen, the display screen connector generates a first control signal and is capable of sending the first control signal to the processor to make the processor send a turn-on instruction to the first switch and a turn-off instruction to the second switch;

[0010] and when the screen detection pin is connected with the second screen, the display screen connector generates a second control signal and is capable of sending the second control signal to the processor to make the processor send a turn-off instruction to the first switch and a turn-on instruction to the second switch.

[0011] In some embodiments, the processor is connected with the display screen connector through a signal line for transmitting the first control signal and the second control signal.

[0012] In some embodiments, the display screen connector has a display screen backlight control pin for electrical connection with the first screen or the second screen;

[0013] The switch module further comprises a signal switch for connecting the display screen backlight control pin and the processor; the processor further sends a turn-off instruction to the signal switch when receiving the first control signal; and the processor further sends a turn-on instruction to the signal switch when receiving the second control signal.

[0014] In some embodiments, the signal switch comprises a backlight signal input pin, a backlight signal output pin and a signal channel control pin;

[0015] The backlight signal input pin is electrically connected with the processor, and the backlight signal output pin is electrically connected with the display screen backlight control pin;

[0016] The processor is electrically connected with the signal channel control pin and is capable of electrically controlling the communication or disconnection of the backlight signal input pin and the backlight signal output pin through the signal channel control pin.

[0017] In some embodiments, the first switch and the second switch are both power switches.

[0018] In some embodiments, the first switch and the second switch each comprise a screen voltage input pin and a screen voltage output pin and a voltage channel control pin;

[0019] The screen voltage input pin is connected with the power supply, and the screen voltage output pin is connected with the first screen power supply pin or the second screen power supply pin of the display screen connector.

[0020] The processor is connected with the voltage channel control pin, and can control the connection or disconnection of the screen voltage input pin and the screen voltage output pin through the voltage channel control pin.

[0021] In some embodiments, a common voltage pin is arranged on the display screen connector, and the common voltage pin can be connected with the power supply and the first screen or the second screen.

[0022] A mainboard comprising the display screen control circuit of any one of the above embodiments.

[0023] An electronic device comprising the mainboard of the above embodiments.

[0024] Compared with the prior art, the beneficial effects of the embodiments of the present application are as follows:

[0025] The display screen connector of the display screen control circuit has the first screen power supply pin and the second screen power supply pin, and the processor controls the power supply to supply power to one of the screen power supply pins and cut off the power supply to the other screen power supply pin through the first switch and the second switch, so that the control circuit can be used to connect the OLED screen and the LCD screen, thereby simplifying the difficulty of testing.

[0026] It should be understood that the foregoing general description and the following detailed description are only exemplary and illustrative, but not for limiting the present application.

[0027] The foregoing summary of various implementations or examples of the technology described in the present application is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF DRAWINGS

[0028] In the drawings, which are not necessarily drawn to scale, like numerals can describe similar components throughout the several views. The drawings are intended to illustrate various embodiments of the application, and are not intended to limit the application. The same reference numerals in different drawings represent the same or similar elements. Where appropriate, the same reference numbers in different drawings can refer to the same or similar components.

[0029] Figure 1 A structural schematic view of the display screen control circuit of the embodiments of the present application;

[0030] Figure 2 A working principle diagram of the display screen control circuit of the embodiments of the present application.

[0031] In the figure: 1, display screen connector; 10, screen detection pin; 11, first screen power supply pin; 12, common voltage pin; 13, display screen backlight control pin; 14, second screen power supply pin; 15, signal line; 2, processor; 3, power supply; 4, first switch; 5, signal switch; 6, second switch; 7, switch module. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without any creative effort fall within the scope of the present application.

[0033] Unless otherwise defined, the technical terms or scientific terms used in the present application should be understood as the usual meaning understood by those of ordinary skill in the art to which the present application belongs. The terms "first", "second" and similar words used in the present application do not represent any order, quantity or importance, but are only used to distinguish different components.

[0034] The terms "include" or "contain" and similar words mean that the elements or objects appearing before the words cover the elements or objects listed after the words and their equivalents, without excluding other elements or objects. The terms "connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "up", "down", "left", "right" and the like are only used to represent relative positional relationships, which may change accordingly when the absolute position of the described object changes.

[0035] In order to keep the following description of the embodiments of the present application clear and simple, the detailed description of known functions and known components is omitted.

[0036] As shown in Figure 1 and Figure 2 The embodiments of the present application provide a control circuit of a display screen, which comprises a display screen connector 1, a switch module 7 and a processor 2.

[0037] The display screen connector 1 has a first screen power supply pin 11 and a second screen power supply pin 12. The first screen power supply pin 11 is used for electrical connection with a first screen, and the second screen power supply pin 12 is used for electrical connection with a second screen.

[0038] The switch module 7 is used for connecting the power supply 3 and the display screen connector 1, and the switch module 7 comprises a first switch 4 and a second switch 6. The first switch 4 is connected with the first screen power supply pin 11 and the power supply 3, and the power supply 3 can supply power to the first screen through the first screen power supply pin 11. The second switch 6 is connected with the second screen power supply pin 12 and the power supply 3, and the power supply 3 can supply power to the second screen through the second screen power supply pin 12.

[0039] The processor 2 is connected with the display screen connector 1, the first switch 4 and the second switch 6 respectively. The processor 2 can receive a control signal, and send a turn-on instruction to one of the first switch 4 and the second switch 6 to make the power supply 3 supply power to the screen corresponding to the turned-on switch, and send a turn-off instruction to the other switch to make the power supply 3 stop supplying power to the screen corresponding to the turned-off switch.

[0040] For example, the processor 2 can receive a first control signal, and then send a turn-on instruction to the first switch 4 and a turn-off instruction to the second switch 6. After the first switch 4 is turned on, the power supply 3 can supply power to the first screen. The processor 2 can receive a second control signal, and then send a turn-off instruction to the first switch 4 and a turn-on instruction to the second switch 6. After the second switch 6 is turned on, the power supply 3 can supply power to the second screen.

[0041] In the display screen control circuit of the embodiment, the display screen connector 1 has the first screen power supply pin 11 and the second screen power supply pin 12, and the processor 2 controls the power supply 3 to supply power to one of the screen power supply pins and cut off the power supply to the other screen power supply pin through the first switch 4 and the second switch 6. Therefore, the control circuit can be used for connecting OLED screens and LCD screens, thereby simplifying the difficulty of testing.

[0042] In some embodiments, the power supply 3 connected with the first switch 4 and the second switch 6 respectively can be the same power supply 3, or the first switch 4 can be connected with one power supply 3 and the second switch 6 can be connected with another power supply 3.

[0043] As shown in FIG. 1, Figure 2 In some embodiments, the display screen connector 1 further has a screen detection pin 10, which is used for electrical connection with the first screen or the second screen.

[0044] When the screen detection pin 10 is connected with the first screen, the display screen connector 1 can generate a first control signal and send the first control signal to the processor 2. After receiving the first control signal, the processor 2 sends a turn-on instruction to the first switch 4 and a turn-off instruction to the second switch 6, so as to realize that the power supply 3 only supplies power to the first screen.

[0045] When the screen detection pin 10 is connected to the second screen, the display screen connector 1 can generate the second control signal and can send the second control signal to the processor 2, and the processor 2 sends the disconnection instruction to the first switch 4 and the turn-on instruction to the second switch 6 after receiving the second control signal, so as to realize that the power supply 3 only supplies power to the second screen.

[0046] In some embodiments, the control signal can be a level signal. For example, when the first screen is an OLED screen, the display screen connector 1 generates a high level signal and sends the high level signal to the processor 2. The high level signal is the first control signal; when the first screen is an LCD screen, the display screen connector 1 generates a low level signal and sends the low level signal to the processor 2. The low level signal is the second control signal.

[0047] The screen connector of the embodiment can transmit the control signal to the processor 2 in a wired or wireless manner. In some embodiments, the processor 2 can be connected to the display screen connector 1 through the signal line 15, and when the display screen connector 1 generates the first control signal or the second control signal, the signal line 15 can be used for transmission to the processor 2.

[0048] In some embodiments, the display screen connector 1 can also have a display screen backlight control pin 13 for electrical connection with the first screen or the second screen. The display screen backlight control pin 13 can be used for the LCD screen to adjust the screen backlight intensity of the LCD.

[0049] Further, the switch module 7 also includes a signal switch 5. The signal switch 5 is used to connect the display screen backlight control pin 13 and the processor 2, and the processor 2 can be used to adjust the backlight of the LCD screen.

[0050] In some embodiments, when the processor 2 receives the first control signal from the display screen connector 1, that is, after the display screen connector 1 is connected to the OLED screen, the processor 2 can also send a disconnection instruction to the signal switch 5, so as to disconnect the control of the processor 2 to the screen backlight.

[0051] When the processor 2 receives the second control signal from the display screen connector 1, that is, after the display screen connector 1 is connected to the LCD screen, the processor 2 can also send a turn-on instruction to the signal switch 5, so that the power supply 3 can realize the power supply to the LCD screen, and the processor 2 can also realize the backlight control of the LCD screen.

[0052] In some embodiments, the signal switch 5 can be a switch chip structure, which includes a backlight signal input pin, a backlight signal output pin and a signal channel control pin.

[0053] The backlight signal input pin is electrically connected to the GPIO control pin on the processor 2, and the backlight signal output pin is electrically connected to the backlight control pin 13 of the screen connector.

[0054] Furthermore, the processor 2 can be electrically connected to the signal channel control pin and can control the connection or disconnection of the backlight signal input pin and the backlight signal output pin through the signal channel control pin.

[0055] When the second screen is an LCD screen, the display backlight control pin 13 on the display connector 1 is the LCDPWM (LCD Pulse Width Modulation) pin, which is electrically connected to the backlight signal output pin.

[0056] In some embodiments, the first switch 4 and the second switch 6 can both be power switches. Furthermore, the first switch 4 and the second switch 6 can be the same power switch or different power switches.

[0057] When the first switch 4 and the second switch 6 can use the same power switch, in some embodiments, both the first switch 4 and the second switch 6 include a screen voltage input pin, a screen voltage output pin, and a voltage channel control pin.

[0058] The screen voltage input pin is connected to the power supply 3, and the screen voltage output pin is connected to the first screen power supply pin 11 or the second screen power supply pin 12 of the display connector 1.

[0059] The processor 2 can be connected to the voltage channel control pin and can control the connection or disconnection of the screen voltage input pin and the screen voltage output pin through the voltage channel control pin, thereby enabling the power supply 3 to power or de-power the screen.

[0060] like Figure 2 As shown, when the first screen is an OLED screen, the first screen power supply pin 11 on the display connector 1 will have two pins: +ELVDD (OLED positive power supply voltage) and +ELVSS (OLED negative power supply voltage). Correspondingly, the first switch 4 will have two screen voltage input pins and two screen voltage output pins, which are used to connect to the +ELVDD (OLED positive power supply voltage) pin and the +ELVSS (OLED negative power supply voltage) pin respectively.

[0061] When the second screen is an LCD screen, there will be one second screen power supply pin 12 on the display connector 1, which is the +LCDVDD (LCD power supply voltage) pin. This +LCDVDD (LCD power supply voltage) pin will be electrically connected to the screen voltage output pin of the second switch 6.

[0062] In some embodiments, the display screen connector 1 is provided with a common voltage pin 14, which can be used to connect the power supply 3 and any display screen, and the power supply 3 can also be connected with the common voltage pin 14 to provide a voltage that can be shared with the first screen and the second screen respectively, for example, the voltage output by the common voltage pin 14 can be 3.3V.

[0063] The utility model embodiment further provides a kind of mainboard, and the mainboard includes the control circuit of display screen of any one of the above embodiments.

[0064] Wherein the mainboard is provided with power supply 3 for being connected with switch module 7, and the mainboard can be matched with at least two kinds of screens.

[0065] The utility model embodiment further provides an electronic equipment, and the electronic equipment can be notebook computer or desktop computer and other some other equipment needing screen display.The electronic equipment includes the mainboard described in the above embodiment.

[0066] The above description is intended to be illustrative and not restrictive, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present disclosure. Moreover, the above examples (or one or more aspects thereof) can be used in combination with each other, and these embodiments can be combined with each other in various combinations or arrangements.

Claims

1. A control circuit for a display screen, characterized by The display screen connector has a first screen power supply pin and a second screen power supply pin, the first screen power supply pin is used for electrical connection with a first screen, and the second screen power supply pin is used for electrical connection with a second screen. The switch module is connected with the power supply and the display screen connector, and comprises a first switch and a second switch, the first switch is connected with the first screen power supply pin and the power supply, and the second switch is connected with the second screen power supply pin and the power supply. The processor is connected with the display screen connector, the first switch and the second switch respectively. The processor can receive a control signal, send a turn-on instruction to one of the first switch and the second switch to make the power supply supply power to the screen corresponding to the switch, and send a turn-off instruction to the other switch to make the power supply stop supplying power to the screen corresponding to the switch. The display screen connector further has a screen detection pin, the screen detection pin is used for electrical connection with the first screen or the second screen, when the screen detection pin is connected with the first screen, the display screen connector generates a first control signal and can send the first control signal to the processor, so that the processor sends a turn-on instruction to the first switch and a turn-off instruction to the second switch.

2. A display screen control circuit as claimed in claim 1, characterized in that When the screen detection pin is connected with the second screen, the display screen connector generates a second control signal and can send the second control signal to the processor, so that the processor sends a turn-off instruction to the first switch and a turn-on instruction to the second switch. The processor is connected with the display screen connector through a signal line, and the signal line is used for transmitting the first control signal and the second control signal.

3. The control circuit for a display screen as described in claim 2, characterized in that, The display screen connector has a display screen backlight control pin, the display screen backlight control pin is used for electrical connection with the first screen or the second screen.

4. The control circuit for a display screen as described in claim 2, characterized in that, The switch module further comprises a signal switch, the signal switch is used for connecting the display screen backlight control pin and the processor, the processor further sends a turn-off instruction to the signal switch when receiving the first control signal, and the processor further sends a turn-on instruction to the signal switch when receiving the second control signal. The signal switch comprises a backlight signal input pin, a backlight signal output pin and a signal channel control pin.

5. A display screen control circuit as claimed in claim 4, wherein the display screen control circuit is configured to control the display screen to display the image in the first mode and the second mode in response to the first and second signals being in the first state. The backlight signal input pin is electrically connected with the processor, and the backlight signal output pin is electrically connected with the display screen backlight control pin. The processor is electrically connected with the signal channel control pin and can control the communication or disconnection of the backlight signal input pin and the backlight signal output pin through the signal channel control pin. The first switch and the second switch are both power switches.

6. A display screen control circuit as claimed in claim 1, characterized in that The first switch and the second switch each comprise a screen voltage input pin, a screen voltage output pin and a voltage channel control pin.

7. The control circuit for a display screen as described in claim 6, characterized in that, The screen voltage input pin is connected with the power supply, and the screen voltage output pin is connected with the first screen power supply pin or the second screen power supply pin of the display screen connector. ​ The processor is connected with the voltage channel control pin and can control the communication or disconnection of the screen voltage input pin and the screen voltage output pin through the voltage channel control pin.

8. A display screen control circuit as claimed in claim 1, characterized in that The display screen connector is provided with a common voltage pin, and the common voltage pin can be connected with a power supply and the first screen or the second screen.

9. A main board, characterized by, A control circuit comprising the display screen according to any one of claims 1-8.

10. An electronic device, comprising: A mainboard comprising the mainboard according to claim 9.

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