CN105118436A - AMOLED display driving circuit and brightness adjustment method - Google Patents

Abstract

The invention provides an AMOLED display drive circuit and brightness adjustment method, comprising: a timing control unit, an image sensor, an analog-to-digital converter, a memory, a processing unit, a brightness correction unit, a row controller, a column controller and an AMOLED pixel array. Collect the brightness information of the ambient light in real time, obtain the image grayscale value matrix of the entire frame of ambient light, obtain the brightness level of the ambient light according to the grayscale value matrix of the image, and correct the image data signal according to the brightness level of the ambient light to obtain an image a data correction signal, the image data correction signal is input into the pixel array. The present invention automatically adjusts the overall display brightness of the AMOLED display according to different ambient light intensities; in addition, users can also increase or decrease the value of the ambient light brightness level according to their own feelings about the display brightness, so that the display brightness effect is more ideal , the flexibility is greatly improved.

Description

AMOLED display drive circuit and brightness adjustment method

technical field

The invention relates to the field of organic light emitting diode display and its driving technology, in particular to an AMOLED display driving circuit and a brightness adjustment method.

Background technique

Organic light-emitting diode (Organic Light-Emitting Diode, OLED) display is a new type of display, usually composed of indium tin oxide (Indiumtinoxide, ITO) anode, metal cathode and between the two hole transport layer, electron transport layer and Emissive layer (organic material) composition. By applying a certain voltage on its cathode and anode, the organic emissive layer in which the electrons and holes recombine, and it will emit light autonomously without the need for a backlight. The color of OLED light is different according to different organic materials; the intensity of light is determined by the current flowing through the OLED.

An active-matrix organic light emitting diode (AMOLED) display is currently a mainstream OLED display. The pixel driving circuit of AMOLED usually consists of a switching element, a driving element and an energy storage element, and is integrated with an OLED device on a substrate. Compared with passive-matrix organic light emitting diode (PMOLED), AMOLED has advantages in power consumption, response speed, and contrast ratio.

Patent Publication No. CN102376241A proposes a method for improving the peak brightness and contrast of an image of an AMOLED display. As shown in FIG. 1 , a patented image data corrector 100 includes a global image load calculator 110 , a first partial image load calculator 121 , a second partial image load calculator 122 and a brightness calculator 130 . Calculate the global image load (the sum of the brightness values of all pixels) of the input image data by the global image load calculator 110, and calculate the local image load (the pixel brightness of a certain sub-region) of the input image data by the local image load calculator 120 The ratio of the sum to the average value of the pixel brightness in this area), so as to limit the maximum value of the input image data through the brightness calculator 130, reduce the luminous intensity, or adjust the brightness of the relevant pixels in a certain sub-region, thereby improving image quality and reduce power consumption.

However, the above-mentioned technique is only a static correction to the input image data, which is used to correct the brightness of the image. However, when the ambient light becomes stronger or weaker, the above-mentioned technologies, including traditional AMOLED displays, cannot spontaneously adjust display brightness to adapt to changes in ambient light intensity. In addition, the actual correction results of the above-mentioned brightness adjustment technology may not satisfy users, so it is also necessary to artificially fine-tune the overall brightness of the display.

Contents of the invention

In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide an AMOLED display drive circuit and a brightness adjustment method, which are used to solve the problem that the AMOLED display in the prior art cannot spontaneously adjust the display brightness to adapt to changes in ambient light intensity, and cannot Human fine-tuning and other issues.

In order to achieve the above purpose and other related purposes, the present invention provides an AMOLED display drive circuit, the AMOLED display drive circuit at least includes:

Timing control unit, image sensor, analog-to-digital converter, memory, processing unit, brightness correction unit, row controller, column controller, and AMOLED pixel array;

The timing control unit is used to generate a timing control signal;

The image sensor is used to collect brightness information of ambient light and output pixel signals (analog voltage or current signals);

The analog-to-digital converter is connected to the output terminal of the image sensor, and performs analog-to-digital conversion on the pixel signal output by the image sensor;

The memory is connected to the output terminal of the analog-to-digital converter, and is used to store the output signal of the analog-to-digital converter to obtain an image gray value matrix of ambient light;

The processing unit is connected to the output end of the memory, reads the image gray value matrix of the entire frame of ambient light from the memory, and outputs the brightness level of the ambient light;

The brightness correction unit is connected to the output terminal of the processing unit and the image data signal, and is used to correct the image data signal according to the output signal of the processing unit, so as to obtain an image data correction signal;

The row controller is connected to the output terminal of the timing control unit, and is controlled by the timing control unit to generate a row gate signal of the AMOLED pixel array;

The column controller is connected to the output end of the brightness correction unit, and uses the image data correction signal as a column data signal of the AMOLED pixel array.

Preferably, the image sensor is a CMOS image sensor or a CCD image sensor.

Preferably, the analog-to-digital converter is an integral type, a successive approximation type, a parallel comparison type, a serial-parallel type, a Σ-Δ type, a capacitor array successive comparison type, or a voltage-frequency conversion type

Preferably, the processing unit is further connected to a fine-tuning signal for fine-tuning the brightness level of the ambient light according to the user's experience with the brightness of the display.

In order to achieve the above purpose and other related purposes, the present invention also provides a method for adjusting the brightness of an AMOLED display, the method for adjusting the brightness of an AMOLED display at least includes:

Collect the brightness information of the ambient light in real time, obtain the image grayscale value matrix of the entire frame of ambient light, obtain the brightness level of the ambient light according to the grayscale value matrix of the image, and correct the image data signal according to the brightness level of the ambient light to obtain an image a data correction signal, the image data correction signal is input into the pixel array.

Preferably, the step of obtaining the ambient light brightness level specifically includes: reading the image gray value matrix, and calculating the average value of the image gray value matrix, and the average value of the image gray value matrix is in the interval [ 0, 2 ^N -1], divide the interval into several files, and number them sequentially according to the brightness from small to large, obtain the ambient light brightness number corresponding to the average value of the image gray value matrix, and set The ambient light brightness number is used as the ambient light brightness level, wherein, N is the number of image grayscale value bits.

More preferably, the ambient light brightness number corresponding to the average value of the image gray value matrix satisfies the following relational expression:

Wherein, K is the ambient light brightness number corresponding to the average value of the image gray value matrix, N is the image gray value bit number, AVG (I) is the average value of the image gray value matrix, AVG (I )=0 represents the highest brightness, AVG(I)=2 ^N -1 represents the lowest brightness, for not greater than The largest positive integer of .

More preferably, it also includes fine-tuning the ambient light brightness number corresponding to the average value of the image gray value matrix according to the user's experience of the brightness of the display, and using the fine-tuned ambient light brightness number as the ambient light brightness level ; If the user feels that the display is too bright, the ambient light brightness number is subtracted by 1. When the ambient light brightness number is the minimum value, the fine-tuned ambient light brightness number remains at the minimum value; If the ambient light brightness number is too dark, add 1 to the ambient light brightness number. When the ambient light brightness number reaches the maximum value, the fine-tuned ambient light brightness number remains at the maximum value; if the user is satisfied with the display brightness, then The ambient light brightness number K is directly used as the ambient light brightness level.

Preferably, the image data correction signal changes monotonically with respect to the image data signal, and when the ambient light brightness level is a minimum value, the value of the image data correction signal is smaller than the value of the image data signal; when When the ambient light brightness level is the maximum value, the value of the image data correction signal is greater than the value of the image data signal.

More preferably, the image data correction signal and the image data signal satisfy the following relationship:

Wherein, data2 is the image data correction signal, data1 is the image data signal, F is the ambient light brightness level, α(F) is a function of the ambient light brightness level F, It is the largest positive integer not greater than data1·α(F).

More preferably, the image data correction signal and the image data signal satisfy the following relationship:

Wherein, data2 is the image data correction signal, data1 is the image data signal, F is the ambient light brightness level, and β(F) is a function of the ambient light brightness level F, It is the largest positive integer not greater than data1+β(F).

As mentioned above, the AMOLED display driving circuit and method of the present invention have the following beneficial effects:

The AMOLED display drive circuit and brightness adjustment method of the present invention use an image sensor to collect brightness information of ambient light, and calculate the average gray value of ambient light, and use a certain mapping method to divide the average gray value of ambient light into several ambient light values. The brightness level corresponds to different ambient light intensities, and then according to the value of the ambient light brightness level, the original image data is increased or decreased, so that the overall display brightness of the AMOLED display can be adjusted; during this process, the user can also Increase or decrease the value of the ambient light brightness level according to your own perception of the display brightness to make the display brightness effect more ideal.

Description of drawings

FIG. 1 is a schematic structural diagram of an image data corrector in the prior art.

FIG. 2 is a schematic structural diagram of an AMOLED display driving circuit of the present invention.

FIG. 3 is a schematic flow chart of obtaining ambient light brightness level in the present invention.

Component designation description

100 image data correctors

110 Global Image Load Calculator

120 partial image load calculator

121 First Partial Image Load Calculator

122 second partial image load calculator

130 brightness calculator

2AMOLED display drive circuit

21 timing control unit

22 image sensors

23 Analog-to-Digital Converters

24 memory

25 processing units

26 brightness correction units

27 row controller

28 column controller

29AMOLED pixel array

Steps S1～S3

Detailed ways

Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

Please refer to Figure 2 to Figure 3. It should be noted that the diagrams provided in this embodiment are only schematically illustrating the basic idea of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the components in actual implementation. Dimensional drawing, the type, quantity and proportion of each component can be changed arbitrarily during actual implementation, and the component layout type may also be more complicated.

Embodiment one

As shown in Figures 2 to 3, the present invention provides an AMOLED display drive circuit 2, the AMOLED display drive circuit 2 at least includes:

Timing control unit 21 , image sensor 22 , analog-to-digital converter 23 , memory 24 , processing unit 25 , brightness correction unit 26 , row controller 27 , column controller 28 and AMOLED pixel array 29 .

As shown in FIG. 2, the timing control unit 21 outputs control signals to the image sensor 22, the analog-to-digital converter 23, the processing unit 25, the brightness correction unit 26, and the line controller 27 And the column controller 28 is used to generate timing control signals to control each module to operate one by one.

As shown in FIG. 2 , the image sensor 22 is connected to the output end of the timing control unit 21 for collecting brightness information of ambient light, and after receiving the readout signal Read sent by the timing control unit 21 Output pixel signals (analog voltage or analog current) row by row or column by column. The image sensor 22 is a CMOS image sensor or a CCD image sensor. In this embodiment, the CMOS image sensor is used to collect grayscale information of ambient light.

As shown in FIG. 2, the analog-to-digital converter 23 is connected to the output terminals of the timing control unit 21 and the image sensor 22, and after receiving the enable signal EN sent by the timing control unit 21, the The pixel signal output from the image sensor 22 is analog-to-digital converted and output. The analog-to-digital converter 23 can be any analog-to-digital converter in the prior art, including integral type, successive approximation type, parallel comparison type, serial-parallel type, Σ-Δ type, capacitor array successive comparison type or voltage converter. frequency conversion type.

As shown in FIG. 2 , the memory 24 is connected to the output terminal of the analog-to-digital converter 23 for storing the output signal of the analog-to-digital converter 23 to obtain an image gray value matrix of ambient light.

As shown in FIG. 2, the processing unit 25 is connected to the output end of the timing control unit 21 and the memory 24, and reads the entire frame of ambient light from the memory 24 according to the control of the timing control unit 21. The image grayscale value matrix Image, and output a value representing the level of ambient light brightness, which is defined as the level of ambient light brightness F. The smaller the ambient light brightness level F is, the lower the brightness of the ambient light is, and the larger the ambient light brightness level F is, the higher the ambient light brightness is.

As shown in Figure 2, the brightness correction unit 26 is connected to the output terminals of the timing control unit 21 and the processing unit 25, and is also connected to an image data signal data1, which is controlled by the timing control unit 21 according to the The ambient light level F corrects the image data signal data1, and outputs the image data correction signal data2. The image data correction signal data2 changes monotonously with respect to the image data signal data1, and when the ambient light level F is a minimum value, the value of the image data correction signal data2 is smaller than the value of the image data signal data1 ; When the ambient light brightness level F is the maximum value, the value of the image data correction signal data2 is greater than the value of the image data signal data1.

As shown in FIG. 2 , the row controller 27 is connected to the output terminal of the timing control unit 21 , and is controlled by the timing control unit 21 to generate a row gate signal SEL of the AMOLED pixel array 29 .

As shown in FIG. 2, the column controller 28 is connected to the output end of the timing control unit 21 and the brightness correction unit 26, and is controlled by the timing control unit 21 to use the image data correction signal data2 as the The column data signal data_in of the AMOLED pixel array 29 described above.

As shown in FIG. 2 , the structure of the AMOLED pixel array 29 may be 2T1C, 3T1C or any other pixel structure. The AMOLED pixel array 29 is controlled by the row select signal SEL and the column data signal data_in to emit light and display image information.

When the ambient light is relatively strong, the ambient light brightness level F is a larger value, and the brightness of the display is improved through brightness correction, and the human eye can better see the display content of the AMOLED display under strong light; on the contrary, When the ambient light is very weak, the brightness level F of the ambient light is a small value, and the overall brightness of the display is lowered through brightness correction, which will not have a great impact on the viewing effect, and at the same time can reduce the power consumption of the display and prolong the life of the display. Display life.

In addition, in order to prevent the method of controlling the display brightness according to the ambient light brightness from failing to achieve an ideal display effect, artificial adjustments can also be made. In this embodiment, the processing unit 25 is also connected to a fine-tuning signal User_feeling. If the fine-tuning signal User_feeling=0, no operation means that the user is satisfied with the current display brightness; if the fine-tuning signal User_feeling=+1, change to Bright operation, that is, the user feels that the display is too dark, and needs to increase the brightness; if the fine-tuning signal User_feeling=-1, dark operation, that is, the user feels that the display is bright, and needs to reduce the brightness. Therefore, the final brightness level, that is, the ambient light brightness level F output by the processing unit 25 is defined as: when User_feeling=-1, if K=0 (already the darkest), then F=0, If K>0, then F=K-1; when User_feeling=0, F=K; when User_feeling=+1, if K=7 (already the brightest), then F=7, if K<7, Then F=K+1.

So far, the brightness of the display can be automatically adjusted according to the change of the ambient light brightness, and at the same time, the brightness of the display can also be fine-tuned artificially, which greatly improves the flexibility and is suitable for the user's experience.

Embodiment two

As shown in FIGS. 2 to 3 , this embodiment provides a method for adjusting brightness of an AMOLED display, and the method for adjusting brightness of an AMOLED display at least includes:

Step S1: Collect the brightness information of the ambient light in real time, and obtain the image gray value matrix Image of the entire frame of ambient light.

As shown in FIG. 2 , the present invention collects brightness information of ambient light in real time through a CMOS image sensor, and then obtains an image gray value matrix Image of the entire frame of ambient light.

Step S2: Obtain the ambient light brightness level F according to the image gray value matrix Image.

As shown in Figure 3, the step of obtaining the ambient light brightness level F specifically includes the following steps:

Step S21 : read the image gray value matrix Image from the memory 24 .

Step S22: Calculate the average value of the image gray value matrix Image, the average value AVG(I) of the image gray value matrix is located in the interval [0, 2 ^N -1]; N is the analog-to-digital converter The number of quantization bits is 23, that is, the number of bits of the gray value of the image.

Specifically, as shown in Figure 3, in this embodiment, taking N=8 as an example, the average value AVG(I) of the image gray value matrix is located in the interval [0, 255], and the image The average value AVG (I) of the gray value matrix is 0 representative white, and the average value AVG (I) of the image gray value matrix is 255 to represent black, and the average value AVG (I) of the image gray value matrix represents The overall brightness of the ambient light is determined, and has nothing to do with the array size of the image sensor 22 .

Step S23: Divide the interval into several levels, and number them in descending order according to the brightness, and obtain the ambient light brightness number corresponding to the average value AVG(I) of the image gray value matrix.

Specifically, the interval is equally divided into N files, and the ambient light brightness number K corresponding to the average value AVG(I) of the image gray value matrix satisfies the following relational expression:

in, for not greater than The largest positive integer of .

As shown in Figure 3, in the present embodiment, the interval is divided into 8 grades, and the ambient light brightness number K corresponding to the average value AVG (I) of the image gray value matrix satisfies the following relational expression:

The ambient light brightness number K represents the overall intensity of the ambient light, and when K=0, it means the ambient light is the weakest; when K=7, it means the ambient light is the strongest. The ambient light brightness number K can be directly used as the ambient light brightness level F, and then jump to step S25; or the ambient light brightness number K can be fine-tuned as the ambient light brightness level F, and then go straight to step S24.

Step S24: fine-tuning the ambient light brightness number K corresponding to the average value AVG(I) of the image gray value matrix according to the user's experience of the brightness of the display.

If the user feels that the display is bright and wants the display to be dark, then the ambient light brightness number K is subtracted by 1; when the ambient light brightness number K>0, the ambient light brightness level F=K-1; When the ambient light brightness number K=0 (minimum value), the ambient light brightness level F=K.

If the user feels that the display is rather dark and wants the display to become brighter, the operation of adding 1 to the number K of the ambient light brightness is performed; when the number K of the ambient light brightness<7, the level of brightness of the ambient light F=K+1 ; When the ambient light brightness number K=7 (maximum value), the ambient light brightness level F=K.

If the user is satisfied with the brightness of the display, the ambient light brightness number K is directly assigned to the ambient light brightness level F, that is, F=K.

Step S25: Outputting the ambient light brightness level F.

Acquiring the value of the brightness level F of the ambient light as a basis for subsequent brightness correction. For example, in a relatively bright outdoor environment, assuming that the average value AVG(I) of the gray value matrix of the image is 44, K=6 can be obtained. At this time, the user may feel that the display is brighter, that is, the fine-tuning Signal User_feeling=-1, so F=K-1=5. As another example, in a room without light at night, assuming that the average value AVG(I) of the image gray value matrix=211, K=1 can be obtained. If the user is satisfied with the brightness of the AMOLED display at this time, the fine-tuning signal User_feeling=0, then F=K=1.

Step S3: Correct the image data signal data1 according to the ambient light level F to obtain an image data correction signal data2, and input the image data correction signal data2 into the pixel array.

The image data correction signal data2 changes monotonously with respect to the image data signal data1, and when the ambient light level F is a minimum value, the value of the image data correction signal data2 is smaller than the value of the image data signal data1 ; When the ambient light brightness level F is the maximum value, the value of the image data correction signal data2 is greater than the value of the image data signal data1.

In this embodiment, the image data correction signal data2 and the image data signal data1 satisfy the following relationship: Wherein α(F) is a function of the brightness level F of the ambient light.

Specifically, in this embodiment, α(F) and the ambient light level F constitute a linear function: α(F)=aF+b, that is, 0<b<1. A and b can be assigned values according to actual needs. In this embodiment, When the ambient light brightness level F=0 (the ambient light is the darkest), α (F)=0.82, that is, the overall brightness of the image has been reduced by 18%; when the ambient light brightness level F=7 (the ambient light is the darkest) bright), α(F)=1.24, at this time the overall brightness of the image increases by 24%. In this embodiment, the value of the image data correction signal data2 is between 0 and 255, and if the final calculated value is greater than 255, it is 255, and if the final calculated value is less than 0, it is 0.

Therefore, through this method, the overall brightness of the AMOLED display image can be adjusted according to the ambient light brightness and the user's experience.

Embodiment Three

This embodiment provides a method for adjusting the brightness of an AMOLED display, which is consistent with the steps in Embodiment 2, except that in Step S23, the interval is divided into several levels in Embodiment 2. In this embodiment, the interval Non-uniform division, and the average value AVG(I) of the image gray value matrix is mapped to the ambient light brightness number K, specifically,

If 180<AVG(I)<=255, then K=0;

If 70<AVG(I)<=180, then K=1;

If 0<AVG(I)<=70, then K=2.

The conversion from the average value AVG(I) of the image grayscale value matrix to the ambient light brightness number K may be performed in other mapping methods, which are not limited to Embodiment 2 and Embodiment 3.

Embodiment Four

This embodiment provides a method for adjusting the brightness of an AMOLED display, which is consistent with the steps in Embodiment 2, except that in Step S3, in Embodiment 2, the image data correction signal data2 and the image data signal data1 satisfy the following relationship:

In this embodiment, the image data correction signal data2 and the image data signal data1 satisfy the following relationship: Wherein β(F) is a function of the brightness level F of the ambient light.

Specifically, in this embodiment, β(F) and the ambient light level F constitute a linear function: β(F)=cF+d, that is, d<0. Values of c and d can be assigned according to actual needs. In this embodiment, data2=data1+3F-11.

The image data correction signal data2 and the image data signal data1 satisfy the following relationship: the image data correction signal data2 changes monotonously with respect to the image data signal data1, and when the ambient light level F is the minimum value When , the value of the image data correction signal data2 is smaller than the value of the image data signal data1; when the ambient light level F is the maximum value, the value of the image data correction signal data2 is greater than the value of the image data signal data1 value. It is not limited to the specific implementation manners in Embodiment 2 and Embodiment 3.

The AMOLED display drive circuit and brightness adjustment method of the present invention use an image sensor to collect brightness information of ambient light, and calculate the average gray value of ambient light, and use a certain mapping method to divide the average gray value of ambient light into several ambient light values. The brightness level corresponds to different ambient light intensities, and then according to the value of the ambient light brightness level, the original image data is increased or decreased, so that the overall display brightness of the AMOLED display can be adjusted; during this process, the user can also Increase or decrease the value of the ambient light brightness level according to your own perception of the display brightness to make the display brightness effect more ideal.

In summary, the present invention provides an AMOLED display drive circuit and brightness adjustment method, including: a timing control unit, an image sensor, an analog-to-digital converter, a memory, a processing unit, a brightness correction unit, a row controller, a column controller and AMOLED pixel array. Collect the brightness information of the ambient light in real time, obtain the image grayscale value matrix of the entire frame of ambient light, obtain the brightness level of the ambient light according to the grayscale value matrix of the image, and correct the image data signal according to the brightness level of the ambient light to obtain an image a data correction signal, the image data correction signal is input into the pixel array. The present invention automatically adjusts the overall display brightness of the AMOLED display according to different ambient light intensities; in addition, users can also increase or decrease the value of the ambient light brightness level according to their own feelings about the display brightness, so that the display brightness effect is more ideal , the flexibility is greatly improved. Therefore, the present invention effectively overcomes various shortcomings in the prior art and has high industrial application value.

The above-mentioned embodiments only illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims (11)

1. An AMOLED display driver circuit, comprising:

the AMOLED display device comprises a time sequence control unit, an image sensor, an analog-to-digital converter, a memory, a processing unit, a brightness correction unit, a row controller, a column controller and an AMOLED pixel array;

the time sequence control unit is used for generating a time sequence control signal;

the image sensor is used for collecting brightness information of ambient light and outputting pixel signals;

the analog-to-digital converter is connected to the output end of the image sensor and is used for performing analog-to-digital conversion on pixel signals output by the image sensor;

the memory is connected to the output end of the analog-to-digital converter and used for storing the output signal of the analog-to-digital converter to obtain an image gray value matrix of the ambient light;

the processing unit is connected to the output end of the memory, reads an image gray value matrix of the whole frame of ambient light from the memory, and outputs the ambient light brightness level;

the brightness correction unit is connected with the output end of the processing unit and the image data signal and is used for correcting the image data signal according to the output signal of the processing unit so as to obtain an image data correction signal;

the row controller is connected to the output end of the time sequence control unit and is controlled by the time sequence control unit to generate a row strobe signal of the AMOLED pixel array;

the column controller is connected to the output end of the brightness correction unit and takes the image data correction signal as a column data signal of the AMOLED pixel array.

2. The AMOLED display driver circuit of claim 1, wherein: the image sensor is a CMOS image sensor or a CCD image sensor.

3. The AMOLED display driver circuit of claim 1, wherein: the analog-to-digital converter is of an integral type, a successive approximation type, a parallel comparison type, a serial-parallel type, a sigma-delta type, a capacitor array successive comparison type or a voltage-frequency conversion type.

4. The AMOLED display driver circuit of claim 1, wherein: the processing unit is also connected with a fine adjustment signal and is used for fine adjusting the environment light brightness level according to the experience of a user on the display brightness.

5. An AMOLED display brightness adjusting method is characterized by comprising the following steps:

the method comprises the steps of collecting brightness information of ambient light in real time, obtaining an image gray value matrix of the whole frame of ambient light, obtaining an ambient light brightness level according to the image gray value matrix, correcting an image data signal according to the ambient light brightness level to obtain an image data correction signal, and inputting the image data correction signal into a pixel array.

6. The AMOLED display brightness adjustment method of claim 5, wherein: the step of obtaining the ambient light brightness level specifically includes: reading the image gray value matrix, and averaging the image gray value matrix, wherein the average value of the image gray value matrix is located in an interval [0, 2 ]^N-1]And dividing the interval into a plurality of grades, sequentially numbering according to the brightness from small to large, acquiring the environment brightness number corresponding to the average value of the image gray value matrix, and taking the environment brightness number as the environment brightness level, wherein N is the bit number of the image gray value.

7. The AMOLED display brightness adjustment method of claim 6, wherein: the environment light brightness number corresponding to the average value of the image gray value matrix meets the following relational expression:

wherein K is the ambient light brightness number corresponding to the average value of the image gray value matrix, N is the bit number of the image gray value, AVG (I) is the average value of the image gray value matrix,is not more thanIs the largest positive integer of (a).

8. The AMOLED display brightness adjustment method of claim 6, wherein: the method also comprises the steps of carrying out fine adjustment on the environment light brightness number corresponding to the average value of the image gray value matrix according to the experience of a user on the brightness of the display, and taking the environment light brightness number after the fine adjustment as the environment light brightness level; if the user feels that the display is bright, the number of the environmental light brightness is reduced by 1, and when the number of the environmental light brightness is the minimum value, the number of the environmental light brightness after fine adjustment is still kept to be the minimum value; if the user feels that the display is dark, adding 1 to the environment light brightness number, and when the environment light brightness number is the maximum value, keeping the environment light brightness number after fine adjustment to be the maximum value; and if the user is satisfied with the brightness of the display, directly taking the environment light brightness number K as the environment light brightness level.

9. The AMOLED display brightness adjustment method of claim 5, wherein: the image data correction signal changes monotonously relative to the image data signal, and when the ambient light brightness level is the minimum value, the value of the image data correction signal is smaller than that of the image data signal; when the ambient light level is a maximum value, the value of the image data correction signal is greater than the value of the image data signal.

10. The AMOLED display brightness adjustment method of claim 9, wherein: the image data correction signal and the image data signal satisfy the following relationship:

wherein data2 is the image data correction signal, data1 is the image data signal, F is the ambient light brightness level, α (F) is a function of the ambient light brightness level F,is the largest positive integer not greater than data1 · α (F).

11. The AMOLED display brightness adjustment method of claim 9, wherein: the image data correction signal and the image data signal satisfy the following relationship:

wherein data2 is the image data correction signal, data1 is the image data signal, F is the ambient light level, β (F) is a function of the ambient light level F,is the largest positive integer no greater than data1+ β (F).