CN105118436A - AMOLED display driving circuit and brightness adjustment method - Google Patents
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Abstract
本发明提供一种AMOLED显示器驱动电路及亮度调节方法，包括：时序控制单元、图像传感器、模数转换器、存储器、处理单元、亮度矫正单元、行控制器、列控制器以及AMOLED像素阵列。实时采集环境光的亮度信息，获取整帧环境光的图像灰度值矩阵，根据所述图像灰度值矩阵得到环境光亮度等级，根据所述环境光亮度等级对图像数据信号进行修正以获取图像数据修正信号，将所述图像数据修正信号输入到像素阵列中。本发明根据不同的环境光强度，自动调节AMOLED显示器的整体显示亮度；此外，用户还可以根据自身对显示亮度的感受，增大或减小环境光亮度等级的值，使得显示亮度效果更为理想，灵活性大大提高。
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
技术领域technical field
本发明涉及有机发光二极管显示器及其驱动技术领域，特别是涉及一种AMOLED显示器驱动电路及亮度调节方法。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.
背景技术Background technique
有机发光二极管(OrganicLight-EmittingDiode，OLED)显示器是一种新型的显示器，通常由铟锡氧化物(Indiumtinoxide，ITO)阳极、金属阴极以及位于这两者之间的空穴传输层、电子传输层和发射层(有机材料)组成。通过在其阴极和阳极上施加一定的电压，使得电子空穴在其中的有机发射层发生复合，就会自主发光，而不需要背光。OLED发光颜色根据有机材料的不同而不同；而发光的强度则由流过此OLED的电流所决定。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.
主动式有机发光二极管(Active-matrixorganiclightemittingdiode，AMOLED)显示器是目前较为主流的一种OLED显示器。AMOLED的像素驱动电路通常由开关元件、驱动元件和储能元件所组成，且与OLED器件一同集成在一个基板上。相比被动式有机发光二极管(Passive-matrixorganiclightemittingdiode，PMOLED)，AMOLED在功耗、响应速度、对比度上都有优势。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.
公开号为CN102376241A的专利中提出了一种改善AMOLED显示器的图像峰值亮度和对比度的方法。如图1所示为专利的图像数据修正器100，包括全局图像负载计算器110、第一局部图像负载计算器121、第二局部图像负载计算器122以及亮度计算器130。通过所述全局图像负载计算器110计算输入图像数据的全局图像负载(所有像素点的亮度值之和)，通过局部图像负载计算器120计算输入图像数据的局部图像负载(某子区域的像素亮度总和与该区域的像素亮度均值之比)，以此通过所述亮度计算器130来限制输入图像数据的最大值，降低发光强度，或在某一子区域对有关像素的亮度进行调节，从而提高图像的质量，并降低功耗。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.
然而，上述技术仅是对输入的图像数据的一种静态矫正，用于修正图像亮度。而当环境光变强或变弱时，上述技术，包括传统AMOLED显示器，并不能自发地调节显示亮度以适应环境光强变化。此外，上述亮度调节技术的实际修正结果可能无法另使用者满意，因此也需要人为地对显示器的整体亮度进行微调。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.
发明内容Contents of the invention
鉴于以上所述现有技术的缺点，本发明的目的在于提供一种AMOLED显示器驱动电路及亮度调节方法，用于解决现有技术中AMOLED显示器不能自发地调节显示亮度以适应环境光强变化，不能人为微调等问题。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.
为实现上述目的及其他相关目的，本发明提供一种AMOLED显示器驱动电路，所述AMOLED显示器驱动电路至少包括：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:
时序控制单元、图像传感器、模数转换器、存储器、处理单元、亮度矫正单元、行控制器、列控制器以及AMOLED像素阵列；Timing control unit, image sensor, analog-to-digital converter, memory, processing unit, brightness correction unit, row controller, column controller, and AMOLED pixel array;
所述时序控制单元用于产生时序控制信号；The timing control unit is used to generate a timing control signal;
所述图像传感器，用于采集环境光的亮度信息，并输出像素信号(模拟电压或电流信号)；The image sensor is used to collect brightness information of ambient light and output pixel signals (analog voltage or current signals);
所述模数转换器连接于所述图像传感器的输出端，对所述图像传感器输出的像素信号进行模数转换；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;
所述存储器连接于所述模数转换器的输出端，用于存储所述模数转换器的输出信号，得到环境光的图像灰度值矩阵；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;
所述处理单元连接于所述存储器的输出端，从所述存储器中读取整帧环境光的图像灰度值矩阵，并输出环境光亮度等级；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;
所述亮度矫正单元连接所述处理单元的输出端和图像数据信号，用于根据所述处理单元的输出信号对所述图像数据信号进行修正，以获取图像数据修正信号；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;
所述行控制器连接于所述时序控制单元的输出端，受所述时序控制单元的控制产生所述AMOLED像素阵列的行选通信号；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;
所述列控制器连接于所述亮度矫正单元的输出端，将所述图像数据修正信号作为所述AMOLED像素阵列的列数据信号。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.
优选地，所述图像传感器为CMOS图像传感器或CCD图像传感器。Preferably, the image sensor is a CMOS image sensor or a CCD image sensor.
优选地，所述模数转换器为积分型、逐次逼近型、并行比较型、串并行型、∑-Δ型、电容阵列逐次比较型或压频变换型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
优选地，所述处理单元还连接一微调信号，用于根据用户对显示器亮度的体验对所述环境光亮度等级进行微调。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.
为实现上述目的及其他相关目的，本发明还提供一种AMOLED显示器亮度调节方法，所述AMOLED显示器亮度调节方法至少包括：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:
实时采集环境光的亮度信息，获取整帧环境光的图像灰度值矩阵，根据所述图像灰度值矩阵得到环境光亮度等级，根据所述环境光亮度等级对图像数据信号进行修正以获取图像数据修正信号，将所述图像数据修正信号输入到像素阵列中。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.
优选地，获取所述环境光亮度等级的步骤具体包括：读取所述图像灰度值矩阵，对所述图像灰度值矩阵求平均值，所述图像灰度值矩阵的平均值位于区间[0，2N-1]内，将所述区间分为若干档，并按光亮度由小到大依次编号，获取所述图像灰度值矩阵的平均值所对应的环境光亮度编号，并将所述环境光亮度编号作为所述环境光亮度等级，其中，N为图像灰度值比特数。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.
更优选地，所述图像灰度值矩阵的平均值对应的环境光亮度编号满足如下关系式：More preferably, the ambient light brightness number corresponding to the average value of the image gray value matrix satisfies the following relational expression:
其中，K为所述图像灰度值矩阵的平均值所对应的环境光亮度编号，N为图像灰度值比特数，AVG(I)为所述图像灰度值矩阵的平均值，AVG(I)＝0表示最高亮度，AVG(I)＝2N-1表示最低亮度，为不大于的最大正整数。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 .
更优选地，还包括根据用户对显示器亮度的体验对所述图像灰度值矩阵的平均值所对应的环境光亮度编号进行微调，并将微调后的环境光亮度编号作为所述环境光亮度等级；若用户感觉显示器偏亮，则对所述环境光亮度编号进行减1操作，当所述环境光亮度编号为最小值时，微调后的环境光亮度编号仍保持为最小值；若用户感觉显示器偏暗，则对所述环境光亮度编号进行加1的操作，当所述环境光亮度编号为最大值时，微调后的环境光亮度编号仍保持为最大值；若用户对显示器亮度满意，则所述环境光亮度编号K直接作为所述环境光亮度等级。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.
优选地，所述图像数据修正信号相对于所述图像数据信号单调变化，且当所述环境光亮度等级为最小值时，所述图像数据修正信号的值小于所述图像数据信号的值；当所述环境光亮度等级为最大值时，所述图像数据修正信号的值大于所述图像数据信号的值。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.
更优选地，所述图像数据修正信号与所述图像数据信号满足如下关系：More preferably, the image data correction signal and the image data signal satisfy the following relationship:
其中，data2为所述图像数据修正信号，data1为所述图像数据信号，F为所述环境光亮度等级，α(F)为所述环境光亮度等级F的函数，为不大于data1·α(F)的最大正整数。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).
更优选地，所述图像数据修正信号与所述图像数据信号满足如下关系：More preferably, the image data correction signal and the image data signal satisfy the following relationship:
其中，data2为所述图像数据修正信号，data1为所述图像数据信号，F为所述环境光亮度等级，β(F)为所述环境光亮度等级F的函数，为不大于data1+β(F)的最大正整数。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).
如上所述，本发明的AMOLED显示器驱动电路及方法，具有以下有益效果：As mentioned above, the AMOLED display driving circuit and method of the present invention have the following beneficial effects:
本发明的AMOLED显示器驱动电路及亮度调节方法用图像传感器采集环境光的亮度信息，并计算出环境光的平均灰度值，用一定的映射方法将环境光的平均灰度值分为若干环境光亮度等级，对应不同的环境光强度，然后根据环境光亮度等级的值，将原始图像数据进行增大或减小的操作，从而能够调节AMOLED显示器的整体显示亮度；在此过程中，用户还可以根据自身对显示亮度的感受，增大或减小环境光亮度等级的值，使得显示亮度效果更为理想。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.
附图说明Description of drawings
图1显示为现有技术中的图像数据修正器的结构示意图。FIG. 1 is a schematic structural diagram of an image data corrector in the prior art.
图2显示为本发明的AMOLED显示器驱动电路的结构示意图。FIG. 2 is a schematic structural diagram of an AMOLED display driving circuit of the present invention.
图3显示为本发明的获取环境光亮度等级的流程示意图。FIG. 3 is a schematic flow chart of obtaining ambient light brightness level in the present invention.
元件标号说明Component designation description
100图像数据修正器100 image data correctors
110全局图像负载计算器110 Global Image Load Calculator
120局部图像负载计算器120 partial image load calculator
121第一局部图像负载计算器121 First Partial Image Load Calculator
122第二局部图像负载计算器122 second partial image load calculator
130亮度计算器130 brightness calculator
2AMOLED显示器驱动电路2AMOLED display drive circuit
21时序控制单元21 timing control unit
22图像传感器22 image sensors
23模数转换器23 Analog-to-Digital Converters
24存储器24 memory
25处理单元25 processing units
26亮度矫正单元26 brightness correction units
27行控制器27 row controller
28列控制器28 column controller
29AMOLED像素阵列29AMOLED pixel array
S1～S3步骤Steps S1～S3
具体实施方式Detailed ways
以下通过特定的具体实例说明本发明的实施方式，本领域技术人员可由本说明书所揭露的内容轻易地了解本发明的其他优点与功效。本发明还可以通过另外不同的具体实施方式加以实施或应用，本说明书中的各项细节也可以基于不同观点与应用，在没有背离本发明的精神下进行各种修饰或改变。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.
请参阅图2～图3。需要说明的是，本实施例中所提供的图示仅以示意方式说明本发明的基本构想，遂图式中仅显示与本发明中有关的组件而非按照实际实施时的组件数目、形状及尺寸绘制，其实际实施时各组件的型态、数量及比例可为一种随意的改变，且其组件布局型态也可能更为复杂。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.
实施例一Embodiment one
如图2～图3所示，本发明提供一种AMOLED显示器驱动电路2，所述AMOLED显示器驱动电路2至少包括：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:
时序控制单元21、图像传感器22、模数转换器23、存储器24、处理单元25、亮度矫正单元26、行控制器27、列控制器28以及AMOLED像素阵列29。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 .
如图2所示，所述时序控制单元21将控制信号输出到所述图像传感器22、所述模数转换器23、所述处理单元25、所述亮度矫正单元26、所述行控制器27以及所述列控制器28，用于产生时序控制信号，控制各模块逐个运作。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.
如图2所示，所述图像传感器22连接于所述时序控制单元21的输出端，用于采集环境光的亮度信息，并在接收到所述时序控制单元21发出的读出信号Read后逐行或逐列输出像素信号(模拟电压或模拟电流)。所述图像传感器22为CMOS图像传感器或CCD图像传感器，在本实施例中，采用CMOS图像传感器采集环境光的灰度信息。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.
如图2所示，所述模数转换器23连接于所述时序控制单元21和所述图像传感器22的输出端，在接收到所述时序控制单元21发出的使能信号EN后对所述图像传感器22输出的像素信号进行模数转换并输出。所述模数转换器23可以是现有技术中的任意一种模数转换器，包括积分型、逐次逼近型、并行比较型、串并行型、∑-Δ型、电容阵列逐次比较型或压频变换型。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.
如图2所示，所述存储器24连接于所述模数转换器23的输出端，用于存储所述模数转换器23的输出信号，得到环境光的图像灰度值矩阵。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.
如图2所示，所述处理单元25连接于所述时序控制单元21和所述存储器24的输出端，根据所述时序控制单元21的控制从所述存储器24中读取整帧环境光的图像灰度值矩阵Image，并输出一个表征环境光亮度等级的值，定义为环境光亮度等级F。所述环境光亮度等级F越小，表示环境光的亮度越低，所述环境光亮度等级F越大，表示环境光的亮度越高。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.
如图2所示，所述亮度矫正单元26连接于所述时序控制单元21和所述处理单元25的输出端，还连接一图像数据信号data1，受所述时序控制单元21的控制根据所述环境光亮度等级F对所述图像数据信号data1进行修正，并输出图像数据修正信号data2。所述图像数据修正信号data2相对于所述图像数据信号data1单调变化，且当所述环境光亮度等级F为最小值时，所述图像数据修正信号data2的值小于所述图像数据信号data1的值；当所述环境光亮度等级F为最大值时，所述图像数据修正信号data2的值大于所述图像数据信号data1的值。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.
如图2所示，所述行控制器27连接于所述时序控制单元21的输出端，受所述时序控制单元21的控制产生所述AMOLED像素阵列29的行选通信号SEL。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 .
如图2所示，所述列控制器28连接于所述时序控制单元21和所述亮度矫正单元26的输出端，受所述时序控制单元21的控制将所述图像数据修正信号data2作为所述AMOLED像素阵列29的列数据信号data_in。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.
如图2所示，所述AMOLED像素阵列29的结构可以是2T1C、3T1C或其他任意结构的像素结构。所述AMOLED像素阵列29受所述行选通信号SEL和所述列数据信号data_in的控制发光并显示图像信息。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.
当环境光比较强时，所述环境光亮度等级F为较大的值，通过亮度矫正将显示器的亮度提高，人眼在强光中也能较好地看到AMOLED显示器的显示内容；相反，当环境光很弱时，所述环境光亮度等级F为较小的值，通过亮度矫正将显示器的亮度整体下调，对观看效果也不会产生很大影响，同时可以降低显示器的功耗，延长显示器寿命。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.
此外，为了避免根据环境光亮度来控制显示亮度的方法不能达到理想的显示效果，还可进行人为的调整。在本实施例中，所述处理单元25还连接一微调信号User_feeling，若所述微调信号User_feeling＝0，不操作，即用户对现在的显示亮度满意；若所述微调信号User_feeling＝+1，变亮操作，即用户感到显示器偏暗，需要增加亮度；若所述微调信号User_feeling＝-1，变暗操作，即用户感到显示器偏亮，需要减低亮度。因此，最终的亮度档位，也就是所述处理单元25输出的所述环境光亮度等级F定义为：当User_feeling＝-1时，若K＝0(已经是最暗)，则F＝0，若K>0，则F＝K-1；当User_feeling＝0时，F＝K；当User_feeling＝+1时，若K＝7(已经是最亮)，则F＝7，若K<7，则F＝K+1。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.
至此，显示器的亮度根据环境光亮度的变化可实现自动调节，同时还可以人为地对显示器亮度进行微调，灵活性大大提高，适于用户的体验。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.
实施例二Embodiment two
如图2～图3所示，本实施例提供一种AMOLED显示器亮度调节方法，所述AMOLED显示器亮度调节方法至少包括：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:
步骤S1：实时采集环境光的亮度信息，获取整帧环境光的图像灰度值矩阵Image。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.
如图2所示，本发明通过CMOS图像传感器实时采集环境光的亮度信息，然后获取整帧环境光的图像灰度值矩阵Image。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.
步骤S2：根据所述图像灰度值矩阵Image得到环境光亮度等级F。Step S2: Obtain the ambient light brightness level F according to the image gray value matrix Image.
如图3所示，获取所述环境光亮度等级F的步骤具体包括以下步骤：As shown in Figure 3, the step of obtaining the ambient light brightness level F specifically includes the following steps:
步骤S21：从所述存储器24中读取所述图像灰度值矩阵Image。Step S21 : read the image gray value matrix Image from the memory 24 .
步骤S22：对所述图像灰度值矩阵Image求平均值，所述图像灰度值矩阵的平均值AVG(I)位于区间[0，2N-1]内；N为所述模数转换器23的量化位数，即图像灰度值比特数。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.
具体地，如图3所示，在本实施例中，以N＝8为例，则所述图像灰度值矩阵的平均值AVG(I)位于区间[0，255]内，且所述图像灰度值矩阵的平均值AVG(I)为0代表白色，所述图像灰度值矩阵的平均值AVG(I)为255代表黑色，所述图像灰度值矩阵的平均值AVG(I)表征了环境光的总体亮度，且与所述图像传感器22的阵列大小无关。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 .
步骤S23：将所述区间分为若干档，并按光亮度由小到大依次编号，获取所述图像灰度值矩阵的平均值AVG(I)所对应的环境光亮度编号。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.
具体地，将所述区间均分为N档，所述图像灰度值矩阵的平均值AVG(I)对应的环境光亮度编号K满足如下关系式：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:
其中，为不大于的最大正整数。 in, for not greater than The largest positive integer of .
如图3所示，在本实施例中，将所述区间均分为8档，所述图像灰度值矩阵的平均值AVG(I)对应的环境光亮度编号K满足如下关系式：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:
所述环境光亮度编号K表征了环境光的总体强弱，且当K＝0时表示环境光最弱；当K＝7时表示环境光最强。所述环境光亮度编号K可直接作为所述环境光亮度等级F，跳转至步骤S25；也可以对所述环境光亮度编号K进行微调后作为所述环境光亮度等级F，直线步骤S24。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.
步骤S24：根据用户对显示器亮度的体验对所述图像灰度值矩阵的平均值AVG(I)所对应的环境光亮度编号K进行微调。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.
若用户感觉显示器偏亮，希望显示器变暗，则对所述环境光亮度编号K进行减1操作；当所述环境光亮度编号K>0时，所述境光亮度等级F＝K-1；当所述环境光亮度编号K＝0(为最小值)时，所述境光亮度等级F＝K。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.
若用户感觉显示器偏暗，希望显示器变亮，则对所述环境光亮度编号K进行加1的操作；当所述环境光亮度编号K<7时，所述境光亮度等级F＝K+1；当所述环境光亮度编号K＝7(为最大值)时，所述境光亮度等级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.
若用户对显示器亮度满意，则所述环境光亮度编号K直接赋值给所述环境光亮度等级F，即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.
步骤S25：输出所述环境光亮度等级F。Step S25: Outputting the ambient light brightness level F.
获取所述环境光亮度等级F的值，以作为后续亮度矫正的依据。举例来说，在比较亮的室外，假设所述图像灰度值矩阵的平均值AVG(I)＝44，则可以得出K＝6，而此时用户可能觉得显示器偏亮，即所述微调信号User_feeling＝-1，于是F＝K-1＝5。又如，夜间在无灯光的室内，假设所述图像灰度值矩阵的平均值AVG(I)＝211，那么可得K＝1，若此时用户对AMOLED显示器亮度满意，即所述微调信号User_feeling＝0，那么F＝K＝1。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.
步骤S3：根据所述环境光亮度等级F对图像数据信号data1进行修正以获取图像数据修正信号data2，将所述图像数据修正信号data2输入到像素阵列中。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.
所述图像数据修正信号data2相对于所述图像数据信号data1单调变化，且当所述环境光亮度等级F为最小值时，所述图像数据修正信号data2的值小于所述图像数据信号data1的值；当所述环境光亮度等级F为最大值时，所述图像数据修正信号data2的值大于所述图像数据信号data1的值。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.
在本实施例中，所述图像数据修正信号data2与所述图像数据信号data1满足如下关系：其中α(F)为所述环境光亮度等级F的函数。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.
具体地，在本实施例中，α(F)与所述环境光亮度等级F构成一次函数：α(F)＝aF+b，即， 0<b<1。可根据实际需要对a、b进行赋值，在本实施例中，当所述环境光亮度等级F＝0时(环境光最暗)，α(F)＝0.82，即图像的整体亮度降低了18％；当所述环境光亮度等级F＝7时(环境光最亮)，α(F)＝1.24，此时图像的整体亮度增加了24％。在本实施例中，所述图像数据修正信号data2的值在0～255之间，若最终计算得到的值大于255则取255，若最终计算得到的值小于0则取0。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.
因此，通过此种方法，AMOLED显示器图像的整体亮度可以根据环境光亮度和用户的感受进行调节。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.
实施例三Embodiment Three
本实施例提供一种AMOLED显示器亮度调节方法，与实施例二的步骤一致，不同之处在于步骤S23，实施例二中将所述区间均分为若干档，在本实施例中，所述区间非均匀划分，并将所述图像灰度值矩阵的平均值AVG(I)映射到所述环境光亮度编号K，具体地，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,
若180<AVG(I)<＝255，则K＝0；If 180<AVG(I)<=255, then K=0;
若70<AVG(I)<＝180，则K＝1；If 70<AVG(I)<=180, then K=1;
若0<AVG(I)<＝70，则K＝2。If 0<AVG(I)<=70, then K=2.
所述图像灰度值矩阵的平均值AVG(I)到所述环境光亮度编号K的转换可以是其它的映射方式，不以实施例二和实施例三为限。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.
实施例四Embodiment Four
本实施例提供一种AMOLED显示器亮度调节方法，与实施例二的步骤一致，不同之处在于步骤S3，实施例二中，所述图像数据修正信号data2与所述图像数据信号data1满足如下关系： 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:
在本实施例中，所述图像数据修正信号data2与所述图像数据信号data1满足如下关系：其中β(F)为所述环境光亮度等级F的函数。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.
具体地，在本实施例中，β(F)与所述环境光亮度等级F构成一次函数：β(F)＝cF+d，即， d<0。可根据实际需要对c、d进行赋值，在本实施例中，data2＝data1+3F-11。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.
所述图像数据修正信号data2与所述图像数据信号data1满足如下关系即可：所述图像数据修正信号data2相对于所述图像数据信号data1单调变化，且当所述环境光亮度等级F为最小值时，所述图像数据修正信号data2的值小于所述图像数据信号data1的值；当所述环境光亮度等级F为最大值时，所述图像数据修正信号data2的值大于所述图像数据信号data1的值。不以实施例二和实施例三中的具体实施方式为限。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.
本发明的AMOLED显示器驱动电路及亮度调节方法用图像传感器采集环境光的亮度信息，并计算出环境光的平均灰度值，用一定的映射方法将环境光的平均灰度值分为若干环境光亮度等级，对应不同的环境光强度，然后根据环境光亮度等级的值，将原始图像数据进行增大或减小的操作，从而能够调节AMOLED显示器的整体显示亮度；在此过程中，用户还可以根据自身对显示亮度的感受，增大或减小环境光亮度等级的值，使得显示亮度效果更为理想。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.
综上所述，本发明提供一种AMOLED显示器驱动电路及亮度调节方法，包括：时序控制单元、图像传感器、模数转换器、存储器、处理单元、亮度矫正单元、行控制器、列控制器以及AMOLED像素阵列。实时采集环境光的亮度信息，获取整帧环境光的图像灰度值矩阵，根据所述图像灰度值矩阵得到环境光亮度等级，根据所述环境光亮度等级对图像数据信号进行修正以获取图像数据修正信号，将所述图像数据修正信号输入到像素阵列中。本发明根据不同的环境光强度，自动调节AMOLED显示器的整体显示亮度；此外，用户还可以根据自身对显示亮度的感受，增大或减小环境光亮度等级的值，使得显示亮度效果更为理想，灵活性大大提高。所以，本发明有效克服了现有技术中的种种缺点而具高度产业利用价值。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.
上述实施例仅例示性说明本发明的原理及其功效，而非用于限制本发明。任何熟悉此技术的人士皆可在不违背本发明的精神及范畴下，对上述实施例进行修饰或改变。因此，举凡所属技术领域中具有通常知识者在未脱离本发明所揭示的精神与技术思想下所完成的一切等效修饰或改变，仍应由本发明的权利要求所涵盖。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.
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