CN105118436A - AMOLED display driving circuit and brightness adjustment method - Google Patents
AMOLED display driving circuit and brightness adjustment method Download PDFInfo
- Publication number
- CN105118436A CN105118436A CN201510589987.XA CN201510589987A CN105118436A CN 105118436 A CN105118436 A CN 105118436A CN 201510589987 A CN201510589987 A CN 201510589987A CN 105118436 A CN105118436 A CN 105118436A
- Authority
- CN
- China
- Prior art keywords
- brightness
- ambient light
- image data
- image
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229920001621 AMOLED Polymers 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000012937 correction Methods 0.000 claims abstract description 61
- 239000011159 matrix material Substances 0.000 claims abstract description 50
- 238000012545 processing Methods 0.000 claims abstract description 19
- 230000007613 environmental effect Effects 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 230000006870 function Effects 0.000 claims description 6
- 238000012935 Averaging Methods 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 238000007519 figuring Methods 0.000 abstract 1
- 230000008859 change Effects 0.000 description 3
- 238000013507 mapping Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012886 linear function Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000005525 hole transport Effects 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Landscapes
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
Abstract
The invention provides an AMOLED display driving circuit and a brightness adjustment method. The AMOLED display driving circuit comprises 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. The method comprises the steps of collecting the brightness information of the ambient light in real time, acquiring the image grey value matrix of the whole-frame ambient light, figuring out the brightness level of the ambient light based on the image grey value matrix, correcting image data signals to obtain image data correction signals according to the brightness level of the ambient light, and inputting the image data correction signals into the pixel array. According to the technical scheme of the invention, according to different ambient light intensities, the overall display brightness of an AMOLED display can be automatically adjusted. In addition, users can increase or decrease the brightness level of the ambient light according to the feelings thereof on the brightness of the display. Therefore, the brightness effect of the display is more ideal and the flexibility is greatly improved.
Description
Technical Field
The invention relates to the technical field of organic light emitting diode displays and driving thereof, in particular to an AMOLED display driving circuit and a brightness adjusting method.
Background
An organic light-emitting diode (OLED) display is a new type of display, and generally comprises an Indium Tin Oxide (ITO) anode, a metal cathode, and a hole transport layer, an electron transport layer, and an emission layer (organic material) therebetween. By applying a certain voltage to the cathode and the anode, the organic emission layer in which the electron holes are recombined can emit light automatically without backlight. The emission color of the OLED differs according to the organic material; the intensity of the emitted light is determined by the current flowing through the OLED.
An Active-matrix organic light emitting diode (AMOLED) display is a mainstream OLED display at present. The pixel driving circuit of the AMOLED generally includes a switching element, a driving element, and an energy storage element, and is integrated with the OLED device on a substrate. Compared with a Passive-matrix organic light emitting diode (PMOLED), the AMOLED has advantages in power consumption, response speed and contrast.
A method of improving the image peak brightness and contrast of AMOLED displays is proposed in publication CN 102376241A. As shown in fig. 1, the image data modifier 100 of the patent includes a global image load calculator 110, a first local image load calculator 121, a second local image load calculator 122, and a brightness calculator 130. The global image load of the input image data (the sum of the brightness values of all the pixels) is calculated by the global image load calculator 110, the local image load of the input image data (the ratio of the sum of the pixel brightness of a certain sub-region to the mean value of the pixel brightness of the region) is calculated by the local image load calculator 120, so that the maximum value of the input image data is limited by the brightness calculator 130, the luminous intensity is reduced, or the brightness of the relevant pixels is adjusted in a certain sub-region, thereby improving the image quality and reducing the power consumption.
However, the above-described technique is only a kind of static correction of the input image data for correcting the image brightness. When the ambient light becomes strong or weak, the above-mentioned techniques, including the conventional AMOLED display, cannot adjust the display brightness spontaneously to adapt to the ambient light intensity variation. In addition, the actual correction result of the brightness adjustment technique may not be satisfactory for users, and therefore, the overall brightness of the display needs to be manually adjusted.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a driving circuit and a brightness adjusting method for an AMOLED display, which are used to solve the problems that the AMOLED display in the prior art cannot adjust the display brightness to adapt to the ambient light intensity change spontaneously, cannot be adjusted by human, and the like.
To achieve the above and other related objects, the present invention provides an AMOLED display driving circuit, including at least:
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 (analog voltage or current 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.
Preferably, the image sensor is a CMOS image sensor or a CCD image sensor.
Preferably, the analog-to-digital converter is of an integrating 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-to-frequency conversion type
Preferably, the processing unit is further connected to a fine-tuning signal for fine-tuning the ambient light brightness level according to the user experience of the display brightness.
To achieve the above and other related objects, the present invention further provides a method for adjusting the brightness of an AMOLED display, the method at least comprising:
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.
Preferably, 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]Dividing the interval into a plurality of grades, numbering the grades in sequence according to the brightness from small to large, obtaining the environmental brightness number corresponding to the average value of the image gray value matrix, and assigning the environmental brightness number to the average value of the image gray value matrixAnd the environment light brightness number is used as the environment light brightness level, wherein N is the bit number of the image gray value.
More preferably, the ambient light brightness number corresponding to the average value of the image gray-value matrix satisfies the following relation:
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 matrix, avg (i) is the average value of the image gray value matrix, avg (i) is 0 representing the highest brightness, avg (i) is 2N-1 represents the lowest luminance,is not more thanIs the largest positive integer of (a).
More preferably, the method further comprises the steps of finely adjusting the ambient 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 finely adjusted ambient light brightness number as the ambient 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.
Preferably, the image data correction signal changes monotonously with respect to the image data signal, and when the ambient light level is a minimum value, a value of the image data correction signal is smaller than a value 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.
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 level, α (F) is a function of the ambient light level F,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 level, β (F) is a function of the ambient light level F,is the largest positive integer no greater than data1+ β (F).
As described above, the AMOLED display driving circuit and method of the present invention have the following advantages:
the AMOLED display driving circuit and the brightness adjusting method collect brightness information of ambient light by using the image sensor, calculate the average gray value of the ambient light, divide the average gray value of the ambient light into a plurality of ambient light brightness levels by using a certain mapping method, correspond to different ambient light intensities, and then increase or decrease the original image data according to the values of the ambient light brightness levels, so that the overall display brightness of the AMOLED display can be adjusted; in the process, the user can increase or decrease the value of the ambient light brightness level according to the feeling of the user on the display brightness, so that the display brightness effect is more ideal.
Drawings
Fig. 1 is a schematic diagram of an image data modifier in the prior art.
Fig. 2 is a schematic structural diagram of the driving circuit of the AMOLED display according to the present invention.
FIG. 3 is a flow chart illustrating the process of obtaining the ambient light level according to the present invention.
Description of the element reference numerals
100 image data corrector
110 global image load calculator
120 local image load calculator
121 first partial image load calculator
122 second partial image load calculator
130 luminance calculator
2AMOLED display driving circuit
21 time sequence control unit
22 image sensor
23 analog-to-digital converter
24 memory
25 processing unit
26 brightness correction unit
27-line controller
28-row controller
29AMOLED pixel array
S1-S3
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Please refer to fig. 2 to fig. 3. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
Example one
As shown in fig. 2 to 3, the present invention provides an AMOLED display driving circuit 2, where the AMOLED display driving circuit 2 at least includes:
a timing control unit 21, an image sensor 22, an analog-to-digital converter 23, a memory 24, a processing unit 25, a brightness correction unit 26, a row controller 27, a column controller 28, and an 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, the row controller 27, and the column controller 28 for generating timing control signals to control the modules 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, and is configured to collect brightness information of ambient light, and output pixel signals (analog voltages or analog currents) row by row or column by column after receiving a Read signal Read sent by the timing control unit 21. The image sensor 22 is a CMOS image sensor or a CCD image sensor, and in this embodiment, the CMOS image sensor is used to collect gray scale information of ambient light.
As shown in fig. 2, the analog-to-digital converter 23 is connected to the output ends of the timing control unit 21 and the image sensor 22, and performs analog-to-digital conversion on the pixel signal output by the image sensor 22 and outputs the pixel signal after receiving the enable signal EN sent by the timing control unit 21. The analog-to-digital converter 23 may be any one of the analog-to-digital converters in the prior art, including an integrating 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-to-frequency conversion type.
As shown in fig. 2, the memory 24 is connected to the output end of the analog-to-digital converter 23, and is configured to store the output signal of the analog-to-digital converter 23, so as to obtain an image gray-scale value matrix of the ambient light.
As shown in fig. 2, the processing unit 25 is connected to the output ends of the timing control unit 21 and the memory 24, reads the Image gray-level matrix Image of the whole frame of ambient light from the memory 24 according to the control of the timing control unit 21, and outputs a value representing the ambient light brightness level, which is defined as an ambient light brightness level F. The smaller the ambient light level F, the lower the brightness of the ambient light, and the larger the ambient light level F, the higher the brightness of the ambient light.
As shown in fig. 2, the brightness correction unit 26 is connected to the output terminals of the timing control unit 21 and the processing unit 25, and further connected to an image data signal data1, and is controlled by the timing control unit 21 to correct the image data signal data1 according to the ambient light brightness level F, and output an image data correction signal data 2. The image data correction signal data2 varies monotonically 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 that of the image data signal data 1; when the ambient light level F is a maximum value, the value of the image data correction signal data2 is greater than the value of the image data signal data 1.
As shown in fig. 2, the row controller 27 is connected to the output end of the timing control unit 21, and is controlled by the timing control unit 21 to generate a row strobe signal SEL of the AMOLED pixel array 29.
As shown in fig. 2, the column controller 28 is connected to the output ends 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 column data signal data _ in of the AMOLED pixel array 29.
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 strobe signal SEL and the column data signal data _ in to emit light and display image information.
When the ambient light ratio is stronger, the ambient light brightness level F is a larger value, the brightness of the display is improved through brightness correction, and the display content of the AMOLED display can be better seen by human eyes in strong light; on the contrary, when the ambient light is weak, the ambient light brightness level F is a small value, the brightness of the display is wholly adjusted downwards through brightness correction, the watching effect is not greatly influenced, meanwhile, the power consumption of the display can be reduced, and the service life of the display is prolonged.
In addition, in order to avoid that the method for controlling the display brightness according to the ambient light brightness cannot achieve the ideal display effect, artificial adjustment can be carried out. In this embodiment, the processing unit 25 is further connected to a fine tuning signal User _ feeding, and if the fine tuning signal User _ feeding is equal to 0, the operation is not performed, that is, the User is satisfied with the current display brightness; if the fine tuning signal User _ blanking is +1, the brightness is changed, that is, the User feels that the display is dark and needs to increase the brightness; if the fine tuning signal User _ blanking is-1, the dimming operation, i.e. the User feels that the display is bright, needs to be dimmed. Therefore, the final brightness level, i.e. the ambient light level F output by the processing unit 25, is defined as: when User _ springing is-1, if K is 0 (already darkest), then F is 0, and if K >0, then F is K-1; when User _ feeling is 0, F is K; when User _ springing is +1, if K is 7 (already brightest), F is 7, and if K is 7, F is K + 1.
Therefore, the brightness of the display can be automatically adjusted according to the change of the brightness of the environment, meanwhile, the brightness of the display can be manually and finely adjusted, the flexibility is greatly improved, and the display is suitable for the experience of a user.
Example two
As shown in fig. 2 to 3, the present embodiment provides a method for adjusting the brightness of an AMOLED display, which at least includes:
step S1: and acquiring brightness information of the ambient light in real time, and acquiring an Image gray value matrix Image of the whole frame of ambient light.
As shown in fig. 2, the present invention acquires brightness information of ambient light in real time through a CMOS Image sensor, and then obtains an Image gray-level value matrix Image of the entire frame of ambient light.
Step S2: and obtaining the ambient light brightness level F according to the Image gray value matrix Image.
As shown in fig. 3, the step of obtaining the ambient light brightness level F specifically includes the following steps:
step S21: the Image gray value matrix Image is read from the memory 24.
Step S22: averaging the Image gray value matrix Image, wherein the average value AVG (I) of the Image gray value matrix is positioned in the interval [0, 2 ]N-1]Internal; n is the quantization bit number of the analog-to-digital converter 23, i.e. the number of bits of the image gray value.
Specifically, as shown in fig. 3, in this embodiment, taking N as an example, the average value avg (i) of the image gray-level matrix is located in the interval [0, 255], and the average value avg (i) of the image gray-level matrix is 0 representing white, the average value avg (i) of the image gray-level matrix is 255 representing black, and the average value avg (i) of the image gray-level matrix represents the overall brightness of the ambient light and is independent of the array size of the image sensor 22.
Step S23: and dividing the interval into a plurality of grades, and sequentially numbering according to the brightness from small to large to obtain the environmental brightness number corresponding to the average value AVG (I) of the image gray value matrix.
Specifically, the intervals are equally divided into N levels, 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:
wherein,is not more thanIs the largest positive integer of (a).
As shown in fig. 3, in this embodiment, the interval is divided into 8 steps, and the ambient light brightness number K corresponding to the average value avg (i) of the image gray-level value matrix satisfies the following relation:
the environment light brightness number K represents the total intensity of the environment light, and when K is 0, the environment light is weakest; when K is 7, it indicates that the ambient light is strongest. The environment light brightness number K can be directly used as the environment light brightness level F, and the step S25 is skipped; the environmental light brightness number K may be trimmed to obtain the environmental light brightness level F, and the step S24 is executed.
Step S24: and finely adjusting the environment light brightness number K corresponding to the average value AVG (I) of the image gray value matrix according to the experience of a user on the brightness of the display.
If the user feels that the display is bright and wants to be dark, subtracting 1 from the environment light brightness number K; when the environment light brightness number K is larger than 0, the environment light brightness grade F is equal to K-1; when the ambient light brightness number K is 0 (minimum value), the ambient light brightness level F is K.
If the user feels that the display is dark and wants to be bright, adding 1 to the environment light brightness number K; when the environment light brightness number K is less than 7, the environment light brightness level F is equal to K + 1; when the ambient light luminance number K is 7 (is the maximum value), the ambient light luminance level F is K.
If the user is satisfied with the brightness of the display, the environment light brightness number K is directly assigned to the environment light brightness level F, that is, F is equal to K.
Step S25: and outputting the environment light brightness level F.
And acquiring the value of the ambient light brightness level F as a basis for subsequent brightness correction. For example, in a bright outdoor environment, assuming that the average avg (i) of the image gray-level matrix is 44, K may be 6, and the User may feel that the display is bright, i.e., the fine-tuning signal User _ tuning is-1, and then F is K-1 or 5. For another example, in a room without light at night, if the average avg (i) of the image gray-scale value matrix is 211, K may be 1, and if the User is satisfied with the brightness of the AMOLED display at this time, that is, if the fine-tuning signal User _ blanking is 0, F may be 1.
Step S3: the image data signal data1 is corrected according to the ambient light level F to obtain an image data correction signal data2, which is input to the pixel array 2.
The image data correction signal data2 varies monotonically 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 that of the image data signal data 1; when the ambient light level F is a maximum value, the value of the image data correction signal data2 is greater than the value of the image data signal data 1.
In the present 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 ambient light level F.
Specifically, in the present embodiment, α (F) and the ambient light brightness level F form a linear function: α (F) ═ aF + b, that is, 0<b<1. the values a, b can be assigned according to actual needs, and in the present embodiment,when the ambient light brightness level F is 0 (ambient light is darkest), α (F) is 0.82, i.e. the overall brightness of the image is reduced by 18%; when the ambient light brightness is equalWhen the level F is 7 (ambient light is brightest), α (F) is 1.24, and 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 255 is taken if the value obtained by the final calculation is greater than 255, and 0 is taken if the value obtained by the final calculation is less than 0.
Therefore, by the method, the overall brightness of the AMOLED display image can be adjusted according to the ambient light brightness and the user experience.
EXAMPLE III
The present embodiment provides a brightness adjustment method for an AMOLED display, which is consistent with the steps of the second embodiment, except that in step S23, the interval is divided into a plurality of levels in the second embodiment, in the present embodiment, the interval is divided non-uniformly, and the average value avg (i) of the image gray-level 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 gray-value matrix to the ambient light brightness number K may be in other mapping manners, and is not limited to the second embodiment and the third embodiment.
Example four
The embodiment provides a brightness adjustment method of an AMOLED display, which is consistent with the steps of the second embodiment, except that in step S3, in the second embodiment, the image data correction signal data2 and the image data signal data1 satisfy the following relationship:
in the present 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 ambient light level F.
Specifically, in the present embodiment, β (F) and the ambient light level F form a linear function: β (F) ═ cF + d, that is, d<0. c and d can be assigned according to actual needs, and in the embodiment, data2 is 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 varies monotonically 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 that of the image data signal data 1; when the ambient light level F is a maximum value, the value of the image data correction signal data2 is greater than the value of the image data signal data 1. The specific implementation manner in the second embodiment and the third embodiment is not limited.
The AMOLED display driving circuit and the brightness adjusting method collect brightness information of ambient light by using the image sensor, calculate the average gray value of the ambient light, divide the average gray value of the ambient light into a plurality of ambient light brightness levels by using a certain mapping method, correspond to different ambient light intensities, and then increase or decrease the original image data according to the values of the ambient light brightness levels, so that the overall display brightness of the AMOLED display can be adjusted; in the process, the user can increase or decrease the value of the ambient light brightness level according to the feeling of the user on the display brightness, so that the display brightness effect is more ideal.
In summary, the present invention provides a driving circuit of an AMOLED display and a brightness adjusting method, including: the display device comprises 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. 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. The AMOLED display automatically adjusts the overall display brightness of the AMOLED display according to different ambient light intensities; in addition, the user can increase or reduce the value of the ambient light brightness level according to the feeling of the user on the display brightness, so that the display brightness effect is more ideal, and the flexibility is greatly improved. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention 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).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510589987.XA CN105118436A (en) | 2015-09-16 | 2015-09-16 | AMOLED display driving circuit and brightness adjustment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510589987.XA CN105118436A (en) | 2015-09-16 | 2015-09-16 | AMOLED display driving circuit and brightness adjustment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105118436A true CN105118436A (en) | 2015-12-02 |
Family
ID=54666399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510589987.XA Pending CN105118436A (en) | 2015-09-16 | 2015-09-16 | AMOLED display driving circuit and brightness adjustment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105118436A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107039000A (en) * | 2017-05-05 | 2017-08-11 | 深圳市华星光电技术有限公司 | The vision signal adjuster and vision signal adjusting method of display device |
| CN109326265A (en) * | 2016-08-18 | 2019-02-12 | 联发科技股份有限公司 | A kind of method and brightness control system of the brightness of adjusting panel |
| CN109817152A (en) * | 2019-04-09 | 2019-05-28 | Oppo广东移动通信有限公司 | Screen luminance adjustment method and Related product |
| CN112885310A (en) * | 2021-01-25 | 2021-06-01 | 北京欧铼德微电子技术有限公司 | Driving method and device and electronic equipment |
| CN112967669A (en) * | 2021-03-02 | 2021-06-15 | 长春希达电子技术有限公司 | Correction method for improving gray scale consistency of LED display screen |
| CN114005401A (en) * | 2020-07-28 | 2022-02-01 | 惠州视维新技术有限公司 | Display effect adjusting method, terminal and storage medium |
| CN116704950A (en) * | 2023-08-04 | 2023-09-05 | 长春希达电子技术有限公司 | Display method of Mini/Micro LED vehicle-mounted display |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101251983A (en) * | 2007-02-23 | 2008-08-27 | 三星Sdi株式会社 | Organic light emitting diode display device and driving method thereof |
| CN102982769A (en) * | 2012-11-09 | 2013-03-20 | 广东欧珀移动通信有限公司 | Method for adaptive control of screen designated area brightness |
| CN103165103A (en) * | 2011-12-12 | 2013-06-19 | 深圳富泰宏精密工业有限公司 | Brightness adjustment system of electronic device display screen and brightness adjustment method of electronic device display screen |
| EP2713359A2 (en) * | 2012-09-28 | 2014-04-02 | Samsung Electronics Co., Ltd | Method and apparatus for controlling screen brightness corresponding to variation of illumination |
| CN104464687A (en) * | 2014-10-30 | 2015-03-25 | 广东欧珀移动通信有限公司 | Method and device for adjusting backlight value of mobile terminal |
-
2015
- 2015-09-16 CN CN201510589987.XA patent/CN105118436A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101251983A (en) * | 2007-02-23 | 2008-08-27 | 三星Sdi株式会社 | Organic light emitting diode display device and driving method thereof |
| CN103165103A (en) * | 2011-12-12 | 2013-06-19 | 深圳富泰宏精密工业有限公司 | Brightness adjustment system of electronic device display screen and brightness adjustment method of electronic device display screen |
| EP2713359A2 (en) * | 2012-09-28 | 2014-04-02 | Samsung Electronics Co., Ltd | Method and apparatus for controlling screen brightness corresponding to variation of illumination |
| CN102982769A (en) * | 2012-11-09 | 2013-03-20 | 广东欧珀移动通信有限公司 | Method for adaptive control of screen designated area brightness |
| CN104464687A (en) * | 2014-10-30 | 2015-03-25 | 广东欧珀移动通信有限公司 | Method and device for adjusting backlight value of mobile terminal |
Non-Patent Citations (1)
| Title |
|---|
| 王仲东等: "《物联网和开发与应用实践》", 28 February 2014 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109326265A (en) * | 2016-08-18 | 2019-02-12 | 联发科技股份有限公司 | A kind of method and brightness control system of the brightness of adjusting panel |
| CN107039000A (en) * | 2017-05-05 | 2017-08-11 | 深圳市华星光电技术有限公司 | The vision signal adjuster and vision signal adjusting method of display device |
| CN109817152A (en) * | 2019-04-09 | 2019-05-28 | Oppo广东移动通信有限公司 | Screen luminance adjustment method and Related product |
| CN109817152B (en) * | 2019-04-09 | 2022-03-11 | Oppo广东移动通信有限公司 | Screen brightness adjusting method and related product |
| CN114005401A (en) * | 2020-07-28 | 2022-02-01 | 惠州视维新技术有限公司 | Display effect adjusting method, terminal and storage medium |
| CN114005401B (en) * | 2020-07-28 | 2023-01-20 | 惠州视维新技术有限公司 | Display effect adjusting method, terminal and storage medium |
| CN112885310A (en) * | 2021-01-25 | 2021-06-01 | 北京欧铼德微电子技术有限公司 | Driving method and device and electronic equipment |
| CN112885310B (en) * | 2021-01-25 | 2022-05-03 | 北京欧铼德微电子技术有限公司 | Driving method and device and electronic equipment |
| CN112967669A (en) * | 2021-03-02 | 2021-06-15 | 长春希达电子技术有限公司 | Correction method for improving gray scale consistency of LED display screen |
| CN112967669B (en) * | 2021-03-02 | 2022-07-12 | 长春希达电子技术有限公司 | Correction method for improving gray scale consistency of LED display screen |
| CN116704950A (en) * | 2023-08-04 | 2023-09-05 | 长春希达电子技术有限公司 | Display method of Mini/Micro LED vehicle-mounted display |
| CN116704950B (en) * | 2023-08-04 | 2024-01-09 | 长春希达电子技术有限公司 | Display method of Mini/Micro LED vehicle-mounted display |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105118436A (en) | AMOLED display driving circuit and brightness adjustment method | |
| KR100844775B1 (en) | Organic light emitting display device | |
| JP4902172B2 (en) | Light emitting display device and driving method thereof | |
| CN103854599B (en) | For the method and apparatus controlling organic light-emitting diode (OLED) display apparatus electric current | |
| CN103731590B (en) | Display device and its control method | |
| KR100793542B1 (en) | Organic electro luminescence display and driving method thereof | |
| TWI393111B (en) | Method and apparatus for power level control and/or contrast control in a display device | |
| US8154478B2 (en) | Organic electro luminescence display and driving method thereof | |
| KR102207464B1 (en) | Display apparatus and driving method thereof | |
| JP5734580B2 (en) | Pixel data correction method and display device for performing the same | |
| JP2008209886A (en) | Organic electroluminescence display and drive method therefor | |
| CN112053653B (en) | Light emitting display device and driving method thereof | |
| KR20150040095A (en) | dimming driving method for Organic Light Emitting Display Device | |
| CN106898306A (en) | Organic light emitting diode display device | |
| KR20160019588A (en) | Display apparatus and display method | |
| JP2024518890A (en) | Display control method, display control device and display device | |
| US20070052632A1 (en) | Driving method which drives display units of different frequency spectra with respective sweep signals and apparatus based on the same | |
| KR100844774B1 (en) | Driving method of organic light emitting display device | |
| TW201033972A (en) | Display device | |
| CN116189617A (en) | Organic light emitting display device and driving method thereof | |
| JP3883890B2 (en) | Luminance control method and luminance control circuit for organic EL display | |
| KR101895996B1 (en) | Organic Light Emitting Display Device and Driving Method Thereof | |
| CN115273749B (en) | OLED adaptive power-saving dimming method | |
| KR100762692B1 (en) | Organic light emitting display and driving method the same | |
| US11908433B2 (en) | Display device and driving method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151202 |
|
| WD01 | Invention patent application deemed withdrawn after publication |