CN109285499B - Integrated circuit, display device and compensation method - Google Patents

Integrated circuit, display device and compensation method Download PDF

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CN109285499B
CN109285499B CN201811478294.3A CN201811478294A CN109285499B CN 109285499 B CN109285499 B CN 109285499B CN 201811478294 A CN201811478294 A CN 201811478294A CN 109285499 B CN109285499 B CN 109285499B
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voltage
compensation
circuit
reference voltage
output
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CN109285499A (en
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刘颖
兰传艳
李奇峰
廖成浩
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BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3258—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the voltage across the light-emitting element

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The present disclosure provides an integrated circuit, a display device and a compensation method, which relate to the technical field of display, wherein the integrated circuit comprises: a first input configured to receive an input voltage; a first output terminal configured to output an operating voltage of a mobile industry processor interface module, the mobile industry processor interface module being connected between the integrated circuit and a display panel; a voltage division circuit configured to obtain a reference voltage from the input voltage; and a compensation circuit configured to derive a sampling voltage from the operating voltage; and outputting a compensation voltage to the first output end according to the sampling voltage and the reference voltage so as to enable the working voltage to be stabilized at a target value related to the reference voltage.

Description

Integrated circuit, display device and compensation method
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to an integrated circuit, a display device, and a compensation method.
Background
Compared with a liquid crystal display panel, an organic light-emitting diode (OLED) display panel has the advantages of low energy consumption, low production cost, self-luminescence, wide viewing angle, fast response speed and the like.
At present, in the use process of the OLED display panel, the display abnormity problem exists, for example, the OLED display panel has a screen-blooming phenomenon.
Disclosure of Invention
The inventor analyzes the display abnormity problem of the OLED display panel and finds that: in the use of the OLED display panel, an Integrated Circuit (IC) is required to transmit various signals, such as data signals, to the display panel through a Mobile Industry Processor Interface (MIPI) module.
The operating voltage of the MIPI module is provided by the IC. To ensure that signals sent by the IC to the display panel are accurate, the MIPI module needs to operate at a stable operating voltage, for example, 1.2V. However, the inventors have noted that, in the related art, the operating voltage output by the IC to the MIPI module fluctuates as the load impedance of the MIPI module changes. The unstable working voltage of the MIPI module causes the display abnormality problem of the OLED display panel.
Accordingly, the embodiments of the present disclosure provide the following technical solutions.
According to an aspect of the embodiments of the present disclosure, there is provided an integrated circuit including: a first input configured to receive an input voltage; a first output terminal configured to output an operating voltage of a mobile industry processor interface module, the mobile industry processor interface module being connected between the integrated circuit and a display panel; a voltage division circuit configured to obtain a reference voltage from the input voltage; and a compensation circuit configured to derive a sampling voltage from the operating voltage; and outputting a compensation voltage to the first output end according to the sampling voltage and the reference voltage so as to enable the working voltage to be stabilized at a target value related to the reference voltage.
In some embodiments, the compensation circuit comprises: a negative feedback amplifier including a third input terminal configured to receive the reference voltage, a fourth input terminal configured to receive the sampled voltage, and a second output terminal configured to output the compensation voltage to the first output terminal; wherein the operating voltage is equal to the compensation voltage.
In some embodiments, the sampled voltage is the operating voltage; the voltage division circuit is further configured to obtain an initial working voltage according to the input voltage and output the initial working voltage to the first output end; wherein the operating voltage is equal to a sum of the initial operating voltage and the compensation voltage.
In some embodiments, the compensation circuit comprises: an analog-to-digital converter configured to convert the operating voltage into a corresponding first digital signal and to convert the reference voltage into a corresponding second digital signal; a subtraction circuit configured to calculate a difference between the first digital signal and the second digital signal to obtain a third digital signal corresponding to a first difference between the operating voltage and the reference voltage; an inverting circuit configured to invert the third digital signal to obtain a fourth digital signal corresponding to a second difference between the reference voltage and the operating voltage; a digital-to-analog converter configured to convert the fourth digital signal into the second difference value and output the second difference value as the compensation voltage to the first output terminal.
In some embodiments, the compensation circuit comprises: a subtraction circuit configured to calculate a first difference between the operating voltage and the reference voltage; an inverting circuit configured to invert the first difference voltage to obtain a second difference between the reference voltage and the operating voltage, and output the second difference as the compensation voltage to the first output terminal.
In some embodiments, the negative feedback amplifier comprises: a voltage sampling circuit configured to sample the operating voltage to obtain the sampled voltage; an operational amplifier comprising the third input, the fourth input, and the second output.
In some embodiments, the voltage sampling circuit comprises: a first resistor, a first end of the first resistor being connected to the first output end, a second end of the first resistor being connected to the second input end; and a first end of the second resistor is connected to the second input end, and a second end of the second resistor is grounded.
In some embodiments, the voltage divider circuit includes: a voltage dividing sub-circuit configured to divide the input voltage to obtain a plurality of voltages; a multiplexer configured to select the reference voltage from the plurality of voltages.
In some embodiments, the voltage divider circuit further comprises: and the linear voltage stabilizer is arranged between the first input end and the voltage dividing sub-circuit.
In some embodiments, the display panel comprises an organic light emitting diode display panel.
According to another aspect of the embodiments of the present disclosure, there is provided a display device including: an integrated circuit as in any one of the above embodiments.
According to another aspect of the embodiments of the present disclosure, there is provided a compensation method for an integrated circuit according to any of the above embodiments, including: receiving an input voltage; obtaining a reference voltage according to the input voltage; obtaining a sampling voltage according to the working voltage of the interface module of the mobile industry processor output by the first output end of the integrated circuit; and outputting a compensation voltage to the first output end according to the sampling voltage and the reference voltage so as to enable the working voltage to be stabilized at a target value related to the reference voltage.
In the integrated circuit provided by the embodiment of the disclosure, the compensation circuit obtains a sampling voltage according to the working voltage of the MIPI module, and outputs the compensation voltage to the first output end of the integrated circuit according to the sampling voltage and the reference voltage, so that the working voltage of the MIPI module is stabilized at a target value related to the reference voltage. The integrated circuit can stabilize the working voltage of the MIPI module, so that the MIPI module can work normally, and the problem of display abnormity of the display panel is solved.
Other features, aspects, and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure, in which:
FIG. 1 is a schematic diagram of an integrated circuit, according to some embodiments of the present disclosure;
FIG. 2 is a schematic diagram of an integrated circuit according to further embodiments of the present disclosure;
FIG. 3 is a schematic diagram of a negative feedback amplifier according to some implementations of the present disclosure;
FIG. 4 is a schematic diagram of an integrated circuit according to further embodiments of the present disclosure;
FIG. 5 is a schematic block diagram of a compensation circuit according to some implementations of the present disclosure;
FIG. 6 is a schematic diagram of a compensation circuit according to further implementations of the present disclosure;
FIG. 7 is a schematic block diagram of a voltage divider circuit according to some implementations of the present disclosure;
fig. 8 is a flow diagram of a compensation method according to some embodiments of the present disclosure.
It should be understood that the dimensions of the various parts shown in the figures are not drawn to scale. Further, the same or similar reference numerals denote the same or similar components.
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, numerical expressions and numerical values set forth in these embodiments should be construed as merely exemplary, and not as limiting, unless otherwise specifically stated.
The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
In the present disclosure, when a specific component is described as being located between a first component and a second component, there may or may not be intervening components between the specific component and the first component or the second component. When it is described that a specific component is connected to other components, the specific component may be directly connected to the other components without having an intervening component, or may be directly connected to the other components without having an intervening component.
All terms (including technical or scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
Fig. 1 is a schematic diagram of a structure of an integrated circuit according to some embodiments of the present disclosure.
As shown in fig. 1, the integrated circuit 100 may include a first input terminal 101, a first output terminal 102, a voltage divider circuit 103, and a compensation circuit 104. For convenience of explanation, fig. 1 also shows a MIPI module 200 and a display panel 300. Here, the MIPI module 200 is connected between the integrated circuit 100 and the display panel 300. The display panel 300 may be, for example, an OLED display panel.
The first input terminal 101 is configured to receive an input voltage VDDIO. The input voltage VDDIO may be, for example, 1.8V.
The first output terminal 102 is configured to output an operating voltage VDDM of the MIPI module 200. Here, the operating voltage VDDM may be used as a power supply voltage of the MIPI module 200 on the one hand, and may be used as a reference voltage of the MIPI module 200 on the other hand. For example, in the case that the received voltage is greater than or equal to the reference voltage, the MIPI module 200 may consider the level of the voltage to be high, i.e., 1; in the case where the received voltage is less than the reference voltage, the MIPI module 200 considers the level of the voltage to be low, that is, 0.
The voltage dividing circuit 103 is configured to divide the input voltage VDDIO to obtain a reference voltage Vref。
The compensation circuit 104 is configured to obtain a sampling voltage V according to the working voltage VDDMsam(ii) a According to the sampling voltage VsamAnd a reference voltage VrefOutput compensation voltage VoffTo the first output terminal 102 to stabilize the operating voltage VDDM at the reference voltage VrefThe associated target value, for example, 1.2V.
In some implementations, the target value may be a reference voltage VrefAnd a fixed coefficient. Here, the fixed coefficient may be determined by the compensation circuit 104. For example, the fixed coefficient may be 1, i.e., the target value is the reference voltage Vref. As another example, the fixed coefficient depends on a parameter of a component inside the compensation circuit 104, such as an amplification factor of a negative feedback amplifier. These two cases will be described separately with reference to different embodiments.
In the above embodiment, the compensation circuit obtains the sampling voltage according to the working voltage of the MIPI module, and outputs the compensation voltage to the first output terminal of the integrated circuit according to the sampling voltage and the reference voltage, so that the working voltage of the MIPI module is stabilized at the target value related to the reference voltage. The integrated circuit can stabilize the working voltage of the MIPI module, so that the MIPI module can work normally, and the problem of display abnormity of the display panel is solved.
FIG. 2 is a schematic diagram of an integrated circuit according to further embodiments of the present disclosure.
As shown in fig. 2, the compensation circuit 104 includes a negative feedback amplifier 114. The negative feedback amplifier 114 includes a third input terminal 1141, a fourth input terminal 1142, and a second output terminal 1143. The third input terminal 1141 is configured to receive a reference voltage VrefThe fourth input terminal is configured to receive the sampling voltage VsamThe second output terminal 1143 is configured to output the compensation voltage VoffTo the first output 102.
In this embodiment, the compensation voltage V output from the negative feedback amplifier 114offI.e., the operating voltage VDDM. According to the principle of the negative feedback amplifier, the working voltage VDDM output by the negative feedback amplifier 114 is equal to the reference voltage VrefAnd the product of the amplification of the negative feedback amplifier. Thus, the reference voltage VrefThe product of the amplification factor of the negative feedback amplifier is the target value. The working voltage of the MIPI module can be stabilized at a target value and cannot change along with the load.
In the above embodiment, the compensation circuit includes a negative feedback amplifier, and the compensation voltage output by the negative feedback amplifier is the working voltage of the MIPI module. Such an integrated circuit can stabilize the operating voltage of the MIPI module.
Fig. 3 is a schematic diagram of a negative feedback amplifier according to some implementations of the present disclosure.
As shown in fig. 3, the negative feedback amplifier 114 includes a voltage sampling circuit 31 and an operational amplifier 32. The voltage sampling circuit 31 is configured to sample the operating voltage VDDM to obtain a sampled voltage. The operational amplifier 32 includes a third input 1141, a fourth input 1142, and a second output 1143.
In some embodiments, the voltage sampling circuit 31 may include a first resistor R1And a second resistor R2. A first resistor R1Is connected to the first output terminal 102, a first resistor R1To the second input 1142. A second resistor R2Is connected to the second input terminal 1142, and a second resistor R2The second terminal of (a) is grounded.
Assuming that the gain of the operational amplifier 32 is A1, the operational voltage VDDM output by the operational amplifier 32 is equal to the reference voltage VrefThe relationship therebetween can be represented by the following formula:
Figure BDA0001892737420000071
it can be seen that the operating voltage VDDM is lower than the reference voltage VrefThe relationship between them is fixed, so the operating voltage VDDM can be stabilized at the target value, that is:
Figure BDA0001892737420000072
fig. 4 is a schematic diagram of an integrated circuit, according to further embodiments of the present disclosure. In this embodiment, the voltage V is sampledsamIs the operating voltage VDDM.
As shown in fig. 4, the first input terminal 101 is configured to receive an input voltage VDDIO. The first output terminal 102 is configured to output an operating voltage VDDM of the MIPI module 200.
The voltage divider circuit 103 is configured to obtain a reference voltage V according to an input voltage VDDIOref. The voltage dividing circuit 103 is further configured to obtain an initial operating voltage V according to the input voltage VDDIOiniAnd applying an initial operating voltage ViniTo the first output terminal 102.
The compensation circuit 104 is configured to obtain a sampling voltage V according to the working voltage VDDMsam(ii) a According to the sampling voltage VsamAnd a reference voltage VrefOutput compensation voltage VoffTo the first output terminal 102 to stabilize the operating voltage VDDM at the reference voltage VrefThe associated target value.
In this embodiment, the operating voltage VDDM is equal to the initial operating voltage ViniAnd a compensation voltage VoffAnd (4) summing.
The compensation circuit 104 shown in fig. 4 can be implemented in a variety of ways, as described below in conjunction with fig. 5 and 6.
Fig. 5 is a schematic diagram of a compensation circuit according to some implementations of the present disclosure.
As shown in fig. 5, the compensation circuit 104 includes an analog-to-digital converter 51, a subtraction circuit 52, an inversion circuit 53, and a digital-to-analog converter 54.
The analog-to-digital converter 51 is configured to convert the operating voltage VDDM (i.e., the sampling voltage V)sam) Converting into corresponding first digital signal, and converting into reference voltage VrefInto a corresponding second digital signal. The subtracting circuit 52 is configured to calculate a difference between the first digital signal and the second digital signal to obtain the operating voltage VDDM and the reference voltage VrefThe first difference therebetween. The inverting circuit 53 is configured to invert the third digital signal to obtain the reference voltage VrefA fourth number corresponding to a second difference between the operating voltages VDDMA signal. The digital-to-analog converter 54 is configured to convert the fourth digital signal into a second difference value, and to use the second difference value as the compensation voltage VoffTo the first output terminal 102. It should be understood that the second difference is opposite to the first difference.
The working voltage VDDM is equal to the initial working voltage ViniAnd a compensation voltage VoffAnd (4) summing. At operating voltage VDDM and reference voltage VrefIn the case that the difference between the first and second difference values is the first difference value, the compensation circuit 104 may use a second difference value, in which the first difference values are opposite numbers, as the compensation voltage VoffOutput to the first output terminal 102, so that the operating voltage VDDM is stabilized at the target value, i.e. the reference voltage Vref。
FIG. 6 is a schematic diagram of a compensation circuit, according to further implementations of the present disclosure.
As shown in fig. 6, the compensation circuit 104 includes a subtraction circuit 61 and an inversion circuit 62.
The subtracting circuit 61 is configured to calculate the operating voltage VDDM and the reference voltage VrefA first difference therebetween. The inverting circuit 62 is configured to invert the first difference voltage to obtain a reference voltage VrefAnd a second difference between the operating voltage VDDM and the second difference as a compensation voltage VoffAnd outputs to the first output terminal.
Similar to fig. 5, the compensation circuit 104 shown in fig. 6 can stabilize the operating voltage VDDM at the reference voltage Vref。
The voltage divider circuit 103 in the above embodiments can be implemented in different ways, and a specific implementation is described below with reference to fig. 7.
Fig. 7 is a schematic diagram of a voltage divider circuit according to some implementations of the present disclosure.
As shown in fig. 7, the voltage dividing circuit 103 includes a voltage dividing sub-circuit 71 and a multiplexer 72.
The voltage dividing sub-circuit 71 is configured to divide the input voltage VDDIO to obtain a plurality of voltages. The multiplexer 72 is configured to select a reference voltage V from a plurality of voltagesref. In some embodiments, the multiplexer 72 is further configured to select the plurality of powers from a plurality of powersSelecting initial working voltage Vini。
In some embodiments, the voltage divider circuit 103 may further include a linear regulator 73 disposed between the first input terminal 101 and the voltage divider sub-circuit 71 to stabilize the input voltage VDDIO.
Fig. 8 is a flow diagram of a compensation method according to some embodiments of the present disclosure. The compensation method may be implemented on the basis of the integrated circuit of any of the above embodiments.
At step 802, an input voltage is received. The input voltage may be, for example, 1.8V.
In step 804, a reference voltage is obtained according to the input voltage.
For example, the input voltage may be divided to obtain a plurality of voltages. Then, a reference voltage is selected from the plurality of voltages. In some embodiments, the reference voltage may be 1.2V.
In step 806, a sampling voltage is obtained according to the working voltage of the MIPI module output by the first output terminal of the integrated circuit.
In some implementations, the sampling voltage may be equal to the operating voltage. In other implementations, the sampling voltage may be less than the operating voltage.
In step 808, a compensation voltage is output to the first output terminal according to the sampled voltage and the reference voltage, so that the operating voltage is stabilized at a target value related to the reference voltage.
In some implementations, the operating voltage may be equal to the compensation voltage.
In other implementations, the compensation method may further include: and obtaining an initial working voltage according to the input voltage, and outputting the initial working voltage to a first output end. In such implementations, the operating voltage is equal to the sum of the initial operating voltage and the compensation voltage.
In the above embodiment, the sampling voltage is obtained according to the operating voltage of the MIPI module, and the compensation voltage is output to the first output terminal of the integrated circuit according to the sampling voltage and the reference voltage, so that the operating voltage of the MIPI module is stabilized at the target value related to the reference voltage. By the mode, the working voltage of the MIPI module can be stable, so that the MIPI module can work normally, and the problem of display abnormity of the display panel is solved.
The present disclosure also provides a display device including the integrated circuit of any one of the above embodiments. The display device may further include a MIPI module and a display panel. In some embodiments, the display device may be any product or component with a display function, such as a mobile terminal, a television, a display, a notebook computer, a digital photo frame, a navigator, an electronic paper, and the like.
Thus, various embodiments of the present disclosure have been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims (6)

1. A display device, comprising:
a display panel;
an integrated circuit; and
a mobile industry processor interface module connected between the integrated circuit and the display panel;
the integrated circuit includes:
a first input configured to receive an input voltage;
a first output configured to output an operating voltage of the mobile industry processor interface module;
the voltage division circuit is configured to obtain a reference voltage and an initial working voltage according to the input voltage and output the initial working voltage to the first output end; and
the compensation circuit is configured to obtain a sampling voltage according to the working voltage, and the sampling voltage is the working voltage; outputting a compensation voltage to the first output end according to the sampling voltage and the reference voltage so that the working voltage is stabilized at the reference voltage, wherein the working voltage is equal to the sum of the initial working voltage and the compensation voltage;
the compensation circuit includes:
an analog-to-digital converter configured to convert the operating voltage into a corresponding first digital signal and to convert the reference voltage into a corresponding second digital signal;
a subtraction circuit configured to calculate a difference between the first digital signal and the second digital signal to obtain a third digital signal corresponding to a first difference between the operating voltage and the reference voltage;
an inverting circuit configured to invert the third digital signal to obtain a fourth digital signal corresponding to a second difference between the reference voltage and the operating voltage; and
a digital-to-analog converter configured to convert the fourth digital signal into the second difference value and output the second difference value as the compensation voltage to the first output terminal.
2. The display device of claim 1, wherein the operating voltage is a supply voltage and a reference voltage of the mobile industry processor interface module.
3. The display device according to claim 1, wherein the voltage dividing circuit comprises:
a voltage dividing sub-circuit configured to divide the input voltage to obtain a plurality of voltages;
a multiplexer configured to select the reference voltage from the plurality of voltages.
4. The display device according to claim 3, wherein the voltage dividing circuit further comprises:
and the linear voltage stabilizer is arranged between the first input end and the voltage dividing sub-circuit.
5. The display device according to any one of claims 1 to 4, wherein the display panel comprises an organic light emitting diode display panel.
6. A compensation method based on the display device of any one of claims 1-5, comprising:
receiving an input voltage;
obtaining a reference voltage according to the input voltage;
obtaining a sampling voltage according to the working voltage of the interface module of the mobile industry processor output by the first output end of the integrated circuit;
and outputting a compensation voltage to the first output end according to the sampling voltage and the reference voltage so as to enable the working voltage to be stabilized at the reference voltage.
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