Power supply circuit, power supply system, display module and display device

Abstract

The application discloses a power supply circuit, a power supply system, a display module and a display device. The power supply circuit comprises a voltage generation module, which is used for generating at least a first voltage; and a follow-up voltage generation module, which is used for inputting the first voltage, an external voltage to be followed and a constant reference voltage, determining a real-time follow-up compensation amount of the first voltage according to the external voltage to be followed and the reference voltage, and performing real-time compensation on the first voltage with the real-time follow-up compensation amount to output a second voltage. The above scheme realizes real-time linkage between the output second voltage and the external voltage to be followed, and when the above scheme is applied to a display circuit, the linkage between the voltages can solve problems such as screen flashing or abnormal display effect caused by inconsistent response time.

Description

Technical Field

[0001] This invention generally relates to the field of display technology, and more specifically to a power supply circuit, a power supply system, a display module, and a display device. Background Technology

[0002] With the continuous development and maturation of AMOLED (Active Matrix Organic Light Emitting Diode) technology, the size of AMOLED, especially flexible AMOLED, is gradually increasing. As AMOLED sizes continue to grow, two independent power ICs are generally used: a PMIC (Power Management Integrated Circuit) and an ELC (Electro-Luminescence Integrated Circuit) to provide the corresponding voltage to drive the AMOLED display.

[0003] To achieve better display results, some voltages change with brightness. This means that some voltages need to be linked with others. However, using separate PMIC and ELIC, the linkage between voltages can cause problems such as screen flickering or abnormal display due to inconsistent response times. Summary of the Invention

[0004] This application aims to provide a power supply circuit, power supply system, display module, and display device, at least to solve problems such as screen flickering or abnormal display effects caused by inconsistent response times due to voltage linkage.

[0005] In a first aspect, the present invention provides a power supply circuit, comprising:

[0006] A voltage generation module, used at least to generate a first voltage;

[0007] The follow-up voltage generation module is used to input the first voltage, the external voltage to be followed, and a constant reference voltage. Based on the external voltage to be followed and the reference voltage, it determines the real-time following compensation amount of the first voltage and performs real-time compensation on the first voltage to output the second voltage.

[0008] As an implementation method, the follow-up voltage generation module includes a real-time follow-up compensation amount determination sub-circuit, which is used to determine the real-time follow-up compensation amount of the external follow-up voltage based on the external follow-up voltage and the reference voltage.

[0009] As an implementation method, the real-time tracking compensation amount determination sub-circuit includes a first amplifier, a first resistor, a second resistor, a third resistor, and a fourth resistor, and the resistance values ​​of the first resistor, the second resistor, the third resistor, and the fourth resistor are equal.

[0010] The inverting input terminal of the first amplifier is connected to the first terminal of the first resistor, and the reference voltage is input to the second terminal of the first resistor; the inverting input terminal of the first amplifier is connected to the first terminal of the second resistor, and the second terminal of the second resistor is connected to the output terminal of the first amplifier.

[0011] The positive input terminal of the first amplifier is connected to the first terminal of the third resistor, and the second terminal of the third resistor is input to the external follower voltage; the positive input terminal of the first amplifier is connected to the first terminal of the fourth resistor, and the second terminal of the fourth resistor is grounded.

[0012] As an implementation method, the real-time tracking compensation amount determination sub-circuit includes a second amplifier, a third amplifier, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, and a ninth resistor, wherein the resistance values ​​of the fifth resistor and the sixth resistor are equal, and the resistance values ​​of the seventh resistor, the eighth resistor, and the ninth resistor are equal.

[0013] The inverting input terminal of the second amplifier is connected to the first terminal of the fifth resistor, and the second terminal of the fifth resistor is input to the external voltage that needs to be followed; the inverting input terminal of the first amplifier is connected to the first terminal of the sixth resistor, and the second terminal of the sixth resistor is connected to the output terminal of the second amplifier;

[0014] The non-inverting input terminal of the second amplifier is grounded;

[0015] The inverting input terminal of the third amplifier is connected to the first terminal of the seventh resistor, and the second terminal of the seventh resistor is connected to the output terminal of the second amplifier; the inverting input terminal of the third amplifier is connected to the first terminal of the eighth resistor, and the second terminal of the eighth resistor is connected to the output terminal of the third amplifier; the inverting input terminal of the third amplifier is connected to the first terminal of the ninth resistor, and the reference voltage is input to the second terminal of the ninth resistor.

[0016] The non-inverting input terminal of the third amplifier is grounded.

[0017] As an implementation method, the follow-up voltage generation module further includes a second voltage generation sub-circuit, which performs real-time compensation on the first voltage with the real-time follow-up compensation amount to output the second voltage.

[0018] As an implementation, the second voltage generation sub-circuit includes a fourth amplifier, a fifth amplifier, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, and a sixteenth resistor, wherein the resistance values ​​of the tenth resistor, the eleventh resistor, and the twelfth resistor are equal, and the resistance values ​​of the fourteenth resistor and the fifteenth resistor are equal.

[0019] The inverting input terminal of the fourth amplifier is connected to the first terminal of the tenth resistor, and the second terminal of the tenth resistor is connected to the first voltage; the inverting input terminal of the fourth amplifier is connected to the first terminal of the eleventh resistor, and the second terminal of the eleventh resistor is connected to the output terminal of the fourth amplifier; the inverting input terminal of the fourth amplifier is connected to the first terminal of the twelfth resistor, and the second terminal of the twelfth resistor receives the real-time tracking compensation amount.

[0020] The non-inverting input terminal of the fourth amplifier is connected to the first terminal of the thirteenth resistor, and the second terminal of the thirteenth resistor is grounded.

[0021] The inverting input terminal of the fifth amplifier is connected to the first terminal of the fourteenth resistor, and the second terminal of the fourteenth resistor is connected to the output terminal of the fourth amplifier; the inverting input terminal of the fifth amplifier is connected to the first terminal of the fifteenth resistor, and the second terminal of the fifteenth resistor is connected to the output terminal of the fifth amplifier, and the output terminal of the fifth amplifier is used to output the second voltage;

[0022] The non-inverting input terminal of the fifth amplifier is connected to the first terminal of the sixteenth resistor, and the second terminal of the sixteenth resistor is grounded.

[0023] Alternatively, the voltage generation module may also be used to generate the reference voltage.

[0024] In a second aspect, the present invention provides a power supply system, comprising:

[0025] The power supply circuit described above;

[0026] It also includes an electroluminescent power supply circuit, wherein the power supply circuit and the electroluminescent power supply circuit are two separate circuits;

[0027] The electroluminescent power supply circuit is used at least to generate the externally required voltage.

[0028] Thirdly, the present invention provides a display module, including a display panel and the power supply circuit or the power supply system described above.

[0029] Fourthly, the present invention provides a display device including the display module described above.

[0030] The above solution, by setting up a follow-up voltage generation module, is used to input the first voltage, the external voltage to be followed, and a constant reference voltage. Based on the external voltage to be followed and the reference voltage, the real-time following compensation amount of the first voltage is determined, and the first voltage is compensated in real time with the real-time following compensation amount to output the second voltage. This achieves real-time linkage between the output second voltage and the external voltage to be followed. When applied to display circuits, it can solve problems such as screen flickering or abnormal display effects caused by inconsistent response times between voltage linkages. Attached Figure Description

[0031] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0032] Figure 1 A schematic diagram of the power supply circuit provided in the first embodiment of the present invention;

[0033] Figure 2 A schematic diagram of the power supply circuit provided in the second embodiment of the present invention;

[0034] Figure 3 A schematic diagram of the power supply circuit provided in the third embodiment of the present invention;

[0035] Figure 4 A schematic diagram of the power supply circuit provided in the fourth embodiment of the present invention;

[0036] Figure 5 A schematic diagram of the power supply circuit provided in the fifth embodiment of the present invention;

[0037] Figure 6 A schematic diagram of the power supply circuit provided in the sixth embodiment of the present invention;

[0038] Figure 7 A schematic diagram of the power supply circuit provided in the 7th embodiment of the present invention;

[0039] Figure 8 A schematic diagram of the power supply circuit provided in the eighth embodiment of the present invention;

[0040] Figure 9 A schematic diagram of a power supply system provided for an embodiment of the present invention. Detailed Implementation

[0041] The present application will now be described in further detail 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 not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0042] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0043] In a first aspect, the present invention provides a power supply circuit, which may be, for example but not limited to, a PMIC, for at least outputting a drive reset voltage Vinit1, a light emission reset voltage Vinit2, a gate drive high voltage VGH, a gate drive low voltage VGL, an analog working voltage AVDD, a gamma high voltage VGMMAH, a gamma low voltage VGMMAL, etc.

[0044] Specifically, such as Figure 1 As shown, the power supply circuit includes a voltage generation module and a follow-up voltage generation module.

[0045] The voltage generation module is used to generate at least a first voltage V1. In this example, the first voltage V1 is taken as the light-emitting reset voltage Vinit2, that is, the light-emitting reset voltage Vinit2 is the voltage that needs to change in tandem. The first voltage V1 is the light-emitting reset voltage Vinit2 before compensation, and the second voltage V2 is the light-emitting reset voltage Vinit2 after compensation of the first voltage V1. In other words, the first voltage V1 and the second voltage V2 are only different in value; both are the light-emitting reset voltage Vinit2. Of course, in other examples, the first voltage V1 can be other voltages depending on actual needs.

[0046] The follow-up voltage generation module is used to input the first voltage V1, the external voltage V4 to be followed, and the constant reference voltage V3. Based on the external voltage V4 to be followed and the reference voltage V3, it determines the real-time following compensation amount of the first voltage V1, and performs real-time compensation on the first voltage V1 with the real-time following compensation amount to output the second voltage V2.

[0047] In this example, the external voltage V4 is taken as the cathode voltage ELVSS of the light-emitting device output by the ELIC. Of course, in other examples, the external voltage V4 can be other voltages depending on the actual needs.

[0048] The external voltage V4 that needs to be followed can be understood as the voltage of which will cause other voltages that need to be followed to change accordingly. The amount of change of the other voltages that need to be followed can be the same as or different from the amount of change of the external voltage V4, depending on the actual situation.

[0049] In this example, the first voltage V1 is linked in real time with the external voltage V4. When the external voltage V4 changes, the first voltage V1 is compensated in real time and becomes the second voltage V2. The second voltage V2 is used as the real-time following voltage of the first voltage V1 as it changes with the external voltage V4 and is then output.

[0050] Wherein, the reference voltage V3 can be the voltage input from an external circuit, such as... Figure 1 As shown; in other examples, it could also be the voltage generated by the power supply circuit itself. The voltage generation module described above is also used to generate the reference voltage V3, such as... Figure 2 As shown.

[0051] The reference voltage V3 can be, for example, but not limited to, -10V to 10V, with a step size of 0.1V; that is, the reference voltage V3 can be selected from any one of -10V, -9.9V, -9.8V, -9.7V, -9.6V, -9.5V...9.5V, 9.6V, 9.7V, 9.8V, 9.9V, and 10V.

[0052] The above solution, by setting up a follow-up voltage generation module, is used to input the first voltage V1, the external voltage V4 to be followed, and a constant reference voltage V3. Based on the external voltage V4 to be followed and the reference voltage V3, the real-time following compensation amount of the first voltage V1 is determined, and the first voltage V1 is compensated in real time with the real-time following compensation amount to output the second voltage V2. This achieves real-time linkage between the output second voltage V2 and the external voltage V4 to be followed. When applied to display circuits, it can solve problems such as screen flickering or abnormal display effects caused by inconsistent response times between voltage linkages.

[0053] Furthermore, in this invention, there is no need to use a timing controller (Tcon) to control the time gap between the external voltage V4 and the first voltage V1 to achieve the first voltage V1 following the changes of the external voltage V4. Therefore, there is no problem of a time gap between the external voltage V4 and the first voltage V1. Moreover, the follow-up voltage generation module can make the first voltage V1 follow the changes of the external voltage V4 in real time and compensate to become the second voltage V2 for output, thus maximizing the display quality.

[0054] As another possible approach, see at least the following: Figure 3 As shown, the follow-up voltage generation module includes a real-time follow-up compensation amount determination sub-circuit, which is used to determine the real-time follow-up compensation amount based on the external follow-up voltage V4 and the reference voltage V3.

[0055] The real-time tracking compensation amount and the first voltage V1 are respectively input to the second voltage generation sub-circuit to generate the second voltage V2.

[0056] For example, but not limited to, the real-time tracking compensation amount can be the difference between the current voltage of the external voltage V4 and the initial voltage, or the difference between the current voltage of the external voltage V4 and the reference voltage V3. Of course, in other examples, the real-time tracking compensation amount can also be other values, which will not be listed here.

[0057] Specifically, when the real-time tracking compensation amount is the difference between the current voltage and the initial voltage of the external voltage V4 to be tracked, at the initial moment, when the external voltage V4 to be tracked remains unchanged, its difference relative to the reference voltage V3 is ΔV1. After the external voltage V4 to be tracked changes, its difference relative to the reference voltage V3 changes to ΔV2. Therefore, the real-time tracking compensation amount is ΔV1 - ΔV2. Since ΔV1 and ΔV2 are the differences between the external voltage V4 to be tracked and the reference voltage V3 before and after the change, the real-time tracking compensation amount can also be expressed as the difference before and after the change of the external voltage V4 to be tracked. As mentioned above, if the external voltage V4 to be tracked is the cathode voltage ELVSS of the light-emitting device, then the real-time tracking compensation amount is ELVSS1 - ELVSS2, where ELVSS1 is the external voltage V4 to be tracked before the change, and ELVSS2 is the external voltage V4 to be tracked after the change.

[0058] When the real-time tracking compensation amount is the difference between the current voltage of the external voltage V4 and the reference voltage V3, the real-time tracking compensation amount is ELVSS2 - reference voltage V3, where ELVSS2 is the changed external voltage V4.

[0059] The following example uses the difference between the current voltage of the external voltage V4 and the reference voltage V3 as an example to illustrate the real-time tracking compensation amount.

[0060] As an implementable method, see at least the following: Figure 4 As shown, the real-time tracking compensation quantity determination sub-circuit includes a first amplifier U1, a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4, and the resistance values ​​of the first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4 are equal.

[0061] The inverting input terminal of the first amplifier U1 is connected to the first terminal of the first resistor R1, and the reference voltage V3 is input to the second terminal of the first resistor R1; the inverting input terminal of the first amplifier U1 is connected to the first terminal of the second resistor R2, and the second terminal of the second resistor R2 is connected to the output terminal of the first amplifier U1.

[0062] The positive input terminal of the first amplifier U1 is connected to the first terminal of the third resistor R3, and the second terminal of the third resistor R3 is input to the external following voltage V4; the positive input terminal of the first amplifier U1 is connected to the first terminal of the fourth resistor R4, and the second terminal of the fourth resistor R4 is grounded.

[0063] Using the above circuit, a real-time follow-up compensation amount can be output at the output terminal of the first amplifier U1. The real-time follow-up compensation amount is ELVSS2 - reference voltage V3.

[0064] As an implementable method, see at least the following: Figure 5 As shown, the real-time tracking compensation quantity determination sub-circuit includes a second amplifier U2, a third amplifier U3, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, and a ninth resistor R9. The resistance values ​​of the fifth resistor R5 and the sixth resistor R6 are equal, and the resistance values ​​of the seventh resistor R7, the eighth resistor R8, and the ninth resistor R9 are equal.

[0065] The inverting input terminal of the second amplifier U2 is connected to the first terminal of the fifth resistor R5, and the second terminal of the fifth resistor R5 is input to the external following voltage V4; the inverting input terminal of the first amplifier U1 is connected to the first terminal of the sixth resistor R6, and the second terminal of the sixth resistor R6 is connected to the output terminal of the second amplifier U2.

[0066] The non-inverting input terminal of the second amplifier U2 is grounded;

[0067] The inverting input terminal of the third amplifier U3 is connected to the first terminal of the seventh resistor R7, and the second terminal of the seventh resistor R7 is connected to the output terminal of the second amplifier U2; the inverting input terminal of the third amplifier U3 is connected to the first terminal of the eighth resistor R8, and the second terminal of the eighth resistor R8 is connected to the output terminal of the third amplifier U3; the inverting input terminal of the third amplifier U3 is connected to the first terminal of the ninth resistor R9, and the reference voltage V3 is input to the second terminal of the ninth resistor R9.

[0068] The non-inverting input terminal of the third amplifier U3 is grounded.

[0069] Using the above circuit, a real-time follow-up compensation amount can be output at the output terminal of the third amplifier U3. The real-time follow-up compensation amount is ELVSS2 - reference voltage V3.

[0070] As an implementable method, see at least the following: Figure 3 As shown, the follow-up voltage generation module further includes a second voltage V2 generation sub-circuit. The second voltage V2 generation sub-circuit performs real-time compensation on the first voltage V1 with the real-time follow-up compensation amount to output the second voltage V2.

[0071] As another possible approach, see at least the following: Figure 6 As shown, the second voltage V2 generation sub-circuit includes a fourth amplifier U4, a fifth amplifier U5, a tenth resistor 10, an eleventh resistor 11, a twelfth resistor 12, a thirteenth resistor 13, a fourteenth resistor 14, a fifteenth resistor 15, and a sixteenth resistor 16. The resistance values ​​of the tenth resistor 10, the eleventh resistor 11, and the twelfth resistor 12 are equal, and the resistance values ​​of the fourteenth resistor 14 and the fifteenth resistor 15 are equal.

[0072] The inverting input terminal of the fourth amplifier U4 is connected to the first terminal of the tenth resistor 10, and the second terminal of the tenth resistor 10 is connected to the first voltage V1; the inverting input terminal of the fourth amplifier U4 is connected to the first terminal of the eleventh resistor 11, and the second terminal of the eleventh resistor 11 is connected to the output terminal of the fourth amplifier U4; the inverting input terminal of the fourth amplifier U4 is connected to the first terminal of the twelfth resistor 12, and the second terminal of the twelfth resistor 12 receives the real-time tracking compensation amount.

[0073] The non-inverting input terminal of the fourth amplifier U4 is connected to the first terminal of the thirteenth resistor 13, and the second terminal of the thirteenth resistor 13 is grounded.

[0074] The inverting input terminal of the fifth amplifier U5 is connected to the first terminal of the fourteenth resistor 14, and the second terminal of the fourteenth resistor 14 is connected to the output terminal of the fourth amplifier U4; the inverting input terminal of the fifth amplifier U5 is connected to the first terminal of the fifteenth resistor 15, and the second terminal of the fifteenth resistor 15 is connected to the output terminal of the fifth amplifier U5; the output terminal of the fifth amplifier U5 is used to output the second voltage V2.

[0075] The non-inverting input terminal of the fifth amplifier U5 is connected to the first terminal of the sixteenth resistor 16, and the second terminal of the sixteenth resistor 16 is grounded.

[0076] The voltage output from the fifth amplifier U5 is the second voltage V2.

[0077] Also participate Figure 7 As shown, the power supply circuit provided by the present invention includes a voltage generation module and a follow-up voltage generation module, wherein the follow-up voltage generation module includes a real-time follow compensation amount determination sub-circuit and a second voltage V2 generation sub-circuit.

[0078] The voltage generation module generates at least a first voltage V1 and a reference voltage V3.

[0079] The real-time tracking compensation amount determination sub-circuit includes a first amplifier U1, a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4, and the resistance values ​​of the first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4 are equal.

[0080] The inverting input terminal of the first amplifier U1 is connected to the first terminal of the first resistor R1, and the reference voltage V3 is input to the second terminal of the first resistor R1; the inverting input terminal of the first amplifier U1 is connected to the first terminal of the second resistor R2, and the second terminal of the second resistor R2 is connected to the output terminal of the first amplifier U1.

[0081] The positive input terminal of the first amplifier U1 is connected to the first terminal of the third resistor R3, and the second terminal of the third resistor R3 is input to the external following voltage V4; the positive input terminal of the first amplifier U1 is connected to the first terminal of the fourth resistor R4, and the second terminal of the fourth resistor R4 is grounded.

[0082] The second voltage V2 generation sub-circuit includes a fourth amplifier U4, a fifth amplifier U5, a tenth resistor 10, an eleventh resistor 11, a twelfth resistor 12, a thirteenth resistor 13, a fourteenth resistor 14, a fifteenth resistor 15, and a sixteenth resistor 16. The resistance values ​​of the tenth resistor 10, the eleventh resistor 11, and the twelfth resistor 12 are equal, and the resistance values ​​of the fourteenth resistor 14 and the fifteenth resistor 15 are equal.

[0083] The inverting input terminal of the fourth amplifier U4 is connected to the first terminal of the tenth resistor 10, and the second terminal of the tenth resistor 10 is connected to the first voltage V1; the inverting input terminal of the fourth amplifier U4 is connected to the first terminal of the eleventh resistor 11, and the second terminal of the eleventh resistor 11 is connected to the output terminal of the fourth amplifier U4; the inverting input terminal of the fourth amplifier U4 is connected to the first terminal of the twelfth resistor 12, and the second terminal of the twelfth resistor 12 receives the real-time tracking compensation amount; that is, the second terminal of the twelfth resistor 12 is connected to the output terminal of the first amplifier U1.

[0084] The non-inverting input terminal of the fourth amplifier U4 is connected to the first terminal of the thirteenth resistor 13, and the second terminal of the thirteenth resistor 13 is grounded.

[0085] The inverting input terminal of the fifth amplifier U5 is connected to the first terminal of the fourteenth resistor 14, and the second terminal of the fourteenth resistor 14 is connected to the output terminal of the fourth amplifier U4; the inverting input terminal of the fifth amplifier U5 is connected to the first terminal of the fifteenth resistor 15, and the second terminal of the fifteenth resistor 15 is connected to the output terminal of the fifth amplifier U5; the output terminal of the fifth amplifier U5 is used to output the second voltage V2.

[0086] The non-inverting input terminal of the fifth amplifier U5 is connected to the first terminal of the sixteenth resistor 16, and the second terminal of the sixteenth resistor 16 is grounded.

[0087] The voltage output from the fifth amplifier U5 is the second voltage V2.

[0088] Also participate Figure 8 As shown, the power supply circuit provided by the present invention includes a voltage generation module and a follow-up voltage generation module, wherein the follow-up voltage generation module includes a real-time follow compensation amount determination sub-circuit and a second voltage V2 generation sub-circuit.

[0089] The voltage generation module generates at least a first voltage V1 and a reference voltage V3.

[0090] The real-time tracking compensation amount determination sub-circuit includes a second amplifier U2, a third amplifier U3, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, and a ninth resistor R9. The resistance values ​​of the fifth resistor R5 and the sixth resistor R6 are equal, and the resistance values ​​of the seventh resistor R7, the eighth resistor R8, and the ninth resistor R9 are equal.

[0091] The inverting input terminal of the second amplifier U2 is connected to the first terminal of the fifth resistor R5, and the second terminal of the fifth resistor R5 is input to the external following voltage V4; the inverting input terminal of the first amplifier U1 is connected to the first terminal of the sixth resistor R6, and the second terminal of the sixth resistor R6 is connected to the output terminal of the second amplifier U2.

[0092] The non-inverting input terminal of the second amplifier U2 is grounded;

[0093] The inverting input terminal of the third amplifier U3 is connected to the first terminal of the seventh resistor R7, and the second terminal of the seventh resistor R7 is connected to the output terminal of the second amplifier U2; the inverting input terminal of the third amplifier U3 is connected to the first terminal of the eighth resistor R8, and the second terminal of the eighth resistor R8 is connected to the output terminal of the third amplifier U3; the inverting input terminal of the third amplifier U3 is connected to the first terminal of the ninth resistor R9, and the reference voltage V3 is input to the second terminal of the ninth resistor R9.

[0094] The non-inverting input terminal of the third amplifier U3 is grounded.

[0095] The second voltage V2 generation sub-circuit includes a fourth amplifier U4, a fifth amplifier U5, a tenth resistor 10, an eleventh resistor 11, a twelfth resistor 12, a thirteenth resistor 13, a fourteenth resistor 14, a fifteenth resistor 15, and a sixteenth resistor 16. The resistance values ​​of the tenth resistor 10, the eleventh resistor 11, and the twelfth resistor 12 are equal, and the resistance values ​​of the fourteenth resistor 14 and the fifteenth resistor 15 are equal.

[0096] The inverting input terminal of the fourth amplifier U4 is connected to the first terminal of the tenth resistor 10, and the second terminal of the tenth resistor 10 is connected to the first voltage V1; the inverting input terminal of the fourth amplifier U4 is connected to the first terminal of the eleventh resistor 11, and the second terminal of the eleventh resistor 11 is connected to the output terminal of the fourth amplifier U4; the inverting input terminal of the fourth amplifier U4 is connected to the first terminal of the twelfth resistor 12, and the second terminal of the twelfth resistor 12 receives the real-time tracking compensation amount; that is, the second terminal of the twelfth resistor 12 is connected to the output terminal of the third amplifier U3;

[0097] The non-inverting input terminal of the fourth amplifier U4 is connected to the first terminal of the thirteenth resistor 13, and the second terminal of the thirteenth resistor 13 is grounded.

[0098] The inverting input terminal of the fifth amplifier U5 is connected to the first terminal of the fourteenth resistor 14, and the second terminal of the fourteenth resistor 14 is connected to the output terminal of the fourth amplifier U4; the inverting input terminal of the fifth amplifier U5 is connected to the first terminal of the fifteenth resistor 15, and the second terminal of the fifteenth resistor 15 is connected to the output terminal of the fifth amplifier U5; the output terminal of the fifth amplifier U5 is used to output the second voltage V2.

[0099] The non-inverting input terminal of the fifth amplifier U5 is connected to the first terminal of the sixteenth resistor 16, and the second terminal of the sixteenth resistor 16 is grounded.

[0100] The voltage output from the fifth amplifier U5 is the second voltage V2.

[0101] Secondly, such as Figure 9 As shown, the present invention provides a power supply system, comprising:

[0102] The power supply circuit PMIC described above; the specific circuit of the power supply circuit PMIC can be found in the examples above, and will not be repeated here.

[0103] It also includes an electroluminescent power supply circuit ELIC, wherein the power supply circuit PMIC and the electroluminescent power supply circuit ELIC are two separate circuits;

[0104] The electroluminescent power supply circuit ELIC is used at least to generate the external follower voltage V4.

[0105] The external voltage V4 here needs to be the cathode voltage ELVSS of the light-emitting device. Of course, the electroluminescent power supply circuit is also used to generate the anode voltage ELVDD of the light-emitting device.

[0106] Thirdly, the present invention provides a display module, including a display panel and the power supply circuit or the power supply system described above.

[0107] Fourthly, the present invention provides a display device including the display module described above.

[0108] The display device is, for example but not limited to, desktop computers, tablets, laptops, mobile phones, PDAs (Personal Digital Assistants), GPS (Global Positioning System), in-vehicle displays, projection displays, cameras, digital cameras, electronic watches, calculators, electronic instruments, meters, LCD panels, electronic paper, televisions, monitors, digital photo frames, navigators, and any other products or components with display functions, and can be applied to products or components such as public displays and virtual displays.

[0109] It should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., used above to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise stated, "a plurality of" means two or more.

[0110] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A power supply circuit, characterized in that, include: A voltage generation module, used at least to generate a first voltage; The follow-up voltage generation module is used to input the first voltage, the external voltage to be followed, and a constant reference voltage. Based on the external voltage to be followed and the reference voltage, it determines the real-time following compensation amount of the first voltage and performs real-time compensation on the first voltage with the real-time following compensation amount to output the second voltage. The follow-up voltage generation module further includes a second voltage generation sub-circuit, which compensates the first voltage in real time with the real-time follow-up compensation amount to output the second voltage; wherein... The second voltage generation sub-circuit includes a fourth amplifier, a fifth amplifier, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, and a sixteenth resistor. The resistance values ​​of the tenth resistor, the eleventh resistor, and the twelfth resistor are equal, and the resistance values ​​of the fourteenth resistor and the fifteenth resistor are equal. The inverting input terminal of the fourth amplifier is connected to the first terminal of the tenth resistor, and the second terminal of the tenth resistor is connected to the first voltage; the inverting input terminal of the fourth amplifier is connected to the first terminal of the eleventh resistor, and the second terminal of the eleventh resistor is connected to the output terminal of the fourth amplifier; the inverting input terminal of the fourth amplifier is connected to the first terminal of the twelfth resistor, and the second terminal of the twelfth resistor receives the real-time tracking compensation amount. The non-inverting input terminal of the fourth amplifier is connected to the first terminal of the thirteenth resistor, and the second terminal of the thirteenth resistor is grounded. The inverting input terminal of the fifth amplifier is connected to the first terminal of the fourteenth resistor, and the second terminal of the fourteenth resistor is connected to the output terminal of the fourth amplifier; the inverting input terminal of the fifth amplifier is connected to the first terminal of the fifteenth resistor, and the second terminal of the fifteenth resistor is connected to the output terminal of the fifth amplifier, and the output terminal of the fifth amplifier is used to output the second voltage; The non-inverting input terminal of the fifth amplifier is connected to the first terminal of the sixteenth resistor, and the second terminal of the sixteenth resistor is grounded.

2. The power supply circuit according to claim 1, characterized in that, The follow-up voltage generation module includes a real-time follow-up compensation amount determination sub-circuit, which is used to determine the real-time follow-up compensation amount based on the external voltage to be followed and the reference voltage.

3. The power supply circuit according to claim 2, characterized in that, The real-time tracking compensation amount determination sub-circuit includes a first amplifier, a first resistor, a second resistor, a third resistor, and a fourth resistor, and the resistance values ​​of the first resistor, the second resistor, the third resistor, and the fourth resistor are equal. The inverting input terminal of the first amplifier is connected to the first terminal of the first resistor, and the reference voltage is input to the second terminal of the first resistor; the inverting input terminal of the first amplifier is connected to the first terminal of the second resistor, and the second terminal of the second resistor is connected to the output terminal of the first amplifier. The positive input terminal of the first amplifier is connected to the first terminal of the third resistor, and the second terminal of the third resistor is input to the external follower voltage; the positive input terminal of the first amplifier is connected to the first terminal of the fourth resistor, and the second terminal of the fourth resistor is grounded.

4. The power supply circuit according to claim 2, characterized in that, The real-time tracking compensation quantity determination sub-circuit includes a second amplifier, a third amplifier, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, and a ninth resistor, wherein the resistance values ​​of the fifth resistor and the sixth resistor are equal, and the resistance values ​​of the seventh resistor, the eighth resistor, and the ninth resistor are equal. The inverting input terminal of the second amplifier is connected to the first terminal of the fifth resistor, and the second terminal of the fifth resistor is input to the external voltage that needs to be followed; the inverting input terminal of the second amplifier is connected to the first terminal of the sixth resistor, and the second terminal of the sixth resistor is connected to the output terminal of the second amplifier; The non-inverting input terminal of the second amplifier is grounded; The inverting input terminal of the third amplifier is connected to the first terminal of the seventh resistor, and the second terminal of the seventh resistor is connected to the output terminal of the second amplifier; the inverting input terminal of the third amplifier is connected to the first terminal of the eighth resistor, and the second terminal of the eighth resistor is connected to the output terminal of the third amplifier; the inverting input terminal of the third amplifier is connected to the first terminal of the ninth resistor, and the reference voltage is input to the second terminal of the ninth resistor. The non-inverting input terminal of the third amplifier is grounded.

5. The power supply circuit according to any one of claims 1-4, characterized in that, The voltage generation module is also used to generate the reference voltage.

6. A power supply system, characterized in that, include: The power supply circuit according to any one of claims 1-5; It also includes an electroluminescent power supply circuit, wherein the power supply circuit and the electroluminescent power supply circuit are two separate circuits; The electroluminescent power supply circuit is used at least to generate the externally required voltage.

7. A display module, characterized in that, It includes a display panel and a power supply circuit as described in any one of claims 1-5 or a power supply system as described in claim 6.

8. A display device, characterized in that, Includes the display module as described in claim 7.

Images