WO2017063224A1 - Amoled显示器的驱动系统及驱动方法 - Google Patents

Amoled显示器的驱动系统及驱动方法 Download PDF

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Publication number
WO2017063224A1
WO2017063224A1 PCT/CN2015/092794 CN2015092794W WO2017063224A1 WO 2017063224 A1 WO2017063224 A1 WO 2017063224A1 CN 2015092794 W CN2015092794 W CN 2015092794W WO 2017063224 A1 WO2017063224 A1 WO 2017063224A1
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Prior art keywords
frame picture
frame
picture
output
module
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English (en)
French (fr)
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曾玉超
徐京
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to US14/890,910 priority Critical patent/US9847052B2/en
Priority to JP2018517398A priority patent/JP6663486B2/ja
Priority to KR1020187006684A priority patent/KR102049680B1/ko
Priority to GB1803606.1A priority patent/GB2557135B/en
Publication of WO2017063224A1 publication Critical patent/WO2017063224A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/0653—Controlling or limiting the speed of brightness adjustment of the illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/10—Special adaptations of display systems for operation with variable images
    • G09G2320/103—Detection of image changes, e.g. determination of an index representative of the image change
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/16—Determination of a pixel data signal depending on the signal applied in the previous frame

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a driving system and a driving method for an AMOLED display.
  • OLED Organic Light Emitting Display
  • OLED Organic Light Emitting Display
  • OLED displays can be classified into two types: passive matrix OLED (PMOLED) and active matrix OLED (AMOLED), namely direct addressing and thin film transistor (TFT). ) Matrix addressing two categories.
  • PMOLED passive matrix OLED
  • AMOLED active matrix OLED
  • TFT thin film transistor
  • Matrix addressing two categories the AMOLED display has pixels arranged in an array, belongs to an active display type, has high luminous efficiency, and is generally used for a high-definition large-sized display device.
  • the AMOLED display is driven by current, and its pixel structure generally includes two transistors, one storage capacitor, and one machine light emitting diode.
  • the organic light emitting diode is a current driving element. When a current flows through the organic light emitting diode, the organic light emitting diode emits light, and it generates different degrees of brightness according to the magnitude of the current flowing through.
  • the organic light emitting diode generally includes an anode, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, and a cathode.
  • the existing method for improving the life of the AMOLED display is to reduce the brightness of the display screen as a whole. In FIG.
  • the line y10 represents the original display brightness of the display screen of the AMOLED display
  • the line y20 represents the overall brightness of the display screen of the AMOLED display. Reduce the display brightness afterwards. Although this method can improve the life of the AMOLED display, the display effect of the AMOLED display is affected due to the reduction in overall brightness.
  • the object of the present invention is to provide a driving system for an AMOLED display, which can reduce the display brightness and power consumption of a static picture without affecting the display effect, and improve the AMOLED display. The life of the display.
  • Another object of the present invention is to provide a driving method for an AMOLED display, which can reduce the display brightness and power consumption of a static picture without affecting the display effect, and improve the life of the AMOLED display.
  • the present invention provides a driving system for an AMOLED display, comprising:
  • a data input module configured to sequentially input display data of two adjacent frames
  • a storage module electrically connected to the data input module, configured to store display data of a first frame of the two adjacent frames
  • a first output module electrically connected to the storage module, configured to directly output display data of the first frame of the adjacent two frames
  • a comparison module electrically connected to the data input module and the storage module, configured to compare whether the first frame picture and the second frame picture in the adjacent two frames are similar, and determine the second frame picture relative to the first frame picture Is a dynamic picture or a static picture, and outputs a time count;
  • a gray scale control module electrically connected to the comparison module and the storage module, configured to control, according to a time count, a gray scale of each pixel in the first frame picture to control an output gray level of the corresponding pixel in the second frame picture;
  • the gray level control module controls the output gray level of the corresponding pixel in the second frame picture to remain unchanged in the original gray level;
  • the grayscale control module controls that the output gray level of the corresponding pixel in the second frame picture gradually decreases with increasing time count within a specific time count range. Thereby causing the display brightness of the static picture to slowly decrease;
  • a second output module electrically connected to the grayscale control module, configured to output display data of the second frame screen processed by the grayscale control module.
  • the display data of the adjacent two frames successively input by the data input module is subjected to a frequency doubling process.
  • the grayscale control module has a built-in pixel grayscale lookup table corresponding to a function f(cnt, gray) that takes a time count and a grayscale of each pixel in the first frame as a variable parameter, wherein cnt represents The time count, gray represents the gray level of each pixel in the first frame picture; the gray level control module controls the output gray level of the corresponding pixel in the second frame picture by searching the pixel gray level lookup table.
  • the time count output by the comparison module is always 0, and the gray level control module searches for the second time from the pixel gray level lookup table.
  • the output grayscale of the corresponding pixel in the frame picture remains unchanged in the original grayscale.
  • the time count cnt output by the comparison module takes 0 as an initial value, and iteratively accumulates in increments of 1, that is, the gray is cnt
  • the output gray level of the corresponding pixel in the second frame picture searched by the order control module from the pixel gray level lookup table gradually decreases with increasing time count within a specific time count range.
  • the invention also provides a driving method of an AMOLED display, comprising the following steps:
  • Step 1 Providing a driving system of an AMOLED display
  • the driving system of the AMOLED display includes: a data input module, a storage module electrically connected to the data input module, a first output module electrically connected to the storage module, and a connection between the data input module and the storage module a module, an electrical connection comparison module and a grayscale control module of the storage module, and a second output module electrically connected to the grayscale control module;
  • Step 2 The data input module sequentially inputs display data of two adjacent frames, and the display data of the first frame of the adjacent two frames is directly output by the first output module and stored in the storage module. Displaying data of the second frame of the adjacent two frames into the comparison module;
  • Step 3 The comparison module compares whether the first frame picture and the second frame picture in the adjacent two frames are similar, and determines whether the second frame picture is a dynamic picture or a static picture relative to the first frame picture, and outputs a time count. ;
  • Step 4 The grayscale control module controls an output grayscale of a corresponding pixel in the second frame picture according to a time count and a grayscale of each pixel in the first frame picture; when the second frame picture is relative to the first When the frame picture is a dynamic picture, the gray level control module controls the output gray level of the corresponding pixel in the second frame picture to remain unchanged in the original gray level; when the second frame picture is a static picture relative to the first frame picture The grayscale control module controls that the output grayscale of the corresponding pixel in the second frame picture gradually decreases with increasing time count within a specific time count range;
  • Step 5 The second output module outputs display data of the second frame screen processed by the grayscale control module.
  • the data input module sequentially inputs the display data of the adjacent two frames of pictures through a frequency doubling process.
  • the grayscale control module has a built-in pixel grayscale lookup table corresponding to a function f(cnt, gray) that takes a time count and a grayscale of each pixel in the first frame as a variable parameter, wherein cnt represents Time count, gray indicates the gray level of each pixel in the first frame picture;
  • the grayscale control module controls the output grayscale of the corresponding pixel in the second frame by searching the pixel grayscale lookup table.
  • the step 3 determines that the second frame picture is a dynamic picture relative to the first frame picture
  • the time count output by the comparison module is always 0, and the gray level control module in the step 4 searches from the pixel gray level.
  • the output gray scale of the corresponding pixel in the second frame picture found in the table remains unchanged in the original gray scale.
  • the time count output by the comparison module takes 0 as an initial value, and iteratively accumulates in increments of 1, in the step 4
  • the output gray scale of the corresponding pixel in the second frame picture searched by the gray scale control module from the pixel gray scale lookup table gradually decreases with increasing time count within a specific time count range.
  • the invention also provides a driving system for an AMOLED display, comprising:
  • a data input module configured to sequentially input display data of two adjacent frames
  • a storage module electrically connected to the data input module, configured to store display data of a first frame of the two adjacent frames
  • a first output module electrically connected to the storage module, configured to directly output display data of the first frame of the adjacent two frames
  • a comparison module electrically connected to the data input module and the storage module, configured to compare whether the first frame picture and the second frame picture in the adjacent two frames are similar, and determine the second frame picture relative to the first frame picture Is a dynamic picture or a static picture, and outputs a time count;
  • a gray scale control module electrically connected to the comparison module and the storage module, configured to control, according to a time count, a gray scale of each pixel in the first frame picture to control an output gray level of the corresponding pixel in the second frame picture;
  • the gray level control module controls the output gray level of the corresponding pixel in the second frame picture to remain unchanged in the original gray level;
  • the grayscale control module controls that the output gray level of the corresponding pixel in the second frame picture gradually decreases with increasing time count within a specific time count range. Thereby causing the display brightness of the static picture to slowly decrease;
  • a second output module electrically connected to the grayscale control module, configured to output display data of the second frame screen processed by the grayscale control module;
  • the display data of the adjacent two frames successively input by the data input module is subjected to a frequency doubling process
  • the grayscale control module has a built-in pixel grayscale lookup table corresponding to a function f(cnt, gray) that uses a time count and a grayscale of each pixel in the first frame as a variable parameter, wherein Cnt represents a time count, gray represents a gray level of each pixel in the first frame picture; the gray level control module controls the output gray level of the corresponding pixel in the second frame picture by searching the pixel gray level lookup table;
  • the time count output by the comparison module is always 0, and the gray level control module searches out the pixel gray level lookup table.
  • the output gray scale of the corresponding pixel in the second frame picture remains unchanged in the original gray scale.
  • the driving system of an AMOLED display provided by the present invention
  • the method compares whether the first frame picture and the second frame picture in the adjacent two frames are similar by the comparison module, determines whether the second frame picture is a dynamic picture or a static picture relative to the first frame picture, and outputs a time count, and passes the gray level
  • the control module controls the output grayscale of the corresponding pixel in the second frame picture according to the time count and the grayscale of each pixel in the first frame picture: when the second frame picture is a dynamic picture relative to the first frame picture,
  • the grayscale control module controls the output grayscale of the corresponding pixel in the second frame to keep the original grayscale unchanged; when the second frame is a static image relative to the first frame, the grayscale control module controls The output gray level of the corresponding pixel in the second frame picture gradually decreases with increasing time count within a specific time count range, so that the display brightness of the static picture is slowly decreased at a speed that is not felt by the human eye.
  • FIG. 1 is a schematic diagram of improving the life of an AMOLED display by reducing the overall brightness of a display screen
  • FIG. 2 is a structural block diagram of a driving system of an AMOLED display of the present invention.
  • FIG. 3 and FIG. 4 are two examples of a pixel gray scale lookup table in a driving system of an AMOLED display according to the present invention.
  • FIG. 5 is a schematic diagram of reducing the brightness of a static picture display by the driving system of the AMOLED display of the present invention
  • FIG. 6 is a flow chart of a driving method of an AMOLED display of the present invention.
  • the present invention provides a driving system for an AMOLED display, comprising: a data input module 1, a storage module 2 electrically connected to the data input module 1, and a first output module electrically connected to the storage module 2. 3. Electrically connecting the data input module 1 and the storage module 2
  • the comparison module 4, the gray connection control module 5 of the electrical connection comparison module 4 and the storage module 2, and the second output module 6 of the grayscale control module 5 are electrically connected.
  • the data input module 1 is configured to input display data of two adjacent frames in sequence. It is worth mentioning that the display data of the adjacent two frames input by the data input module 1 is subjected to a frequency multiplication process, that is, the driving frequency of the AMOLED display is increased to twice the original driving frequency, so that the original display is only for one display. Two adjacent frames can be displayed in the frame picture time.
  • the storage module 2 is configured to store display data of a first frame of the adjacent two frames.
  • the first output module 3 is configured to directly output display data of a first frame of the adjacent two frames.
  • the grayscale control module 5 is configured to control an output grayscale of a corresponding pixel in the second frame according to a time count cnt and a grayscale of each pixel in the first frame picture: when the second frame is relative to the first frame
  • the gray level control module 5 controls the output gray level of the corresponding pixel in the second frame picture to remain unchanged in the original gray level; when the second frame picture is relative to the first frame picture
  • the grayscale control module 5 controls the output gray level of the corresponding pixel in the second frame picture to gradually decrease with increasing time count cnt within a specific time count range, thereby causing a static picture As shown in FIG.
  • y1 represents the original display brightness of the still picture
  • y2 represents the display brightness after the display of the static picture is reduced by the driving system of the present invention
  • the display brightness is slowly lowered at a speed that is undetectable to the human eye, and can be realized in Under the premise of not affecting the display effect, the display brightness and power consumption of the static picture are reduced, and the life of the AMOLED display is improved.
  • the second output module 6 is configured to output display data of the second frame screen processed by the grayscale control module 5.
  • the grayscale control module 5 has a built-in pixel grayscale lookup table corresponding to a function f that uses the time count cnt and the grayscale of each pixel in the first frame as a variable parameter.
  • Cnt, gray where cnt represents the time count, and gray represents the gray level of each pixel in the first frame picture.
  • the pixel gray scale lookup table can be set according to image display characteristics such as display brightness, gamma curve, contrast, and the like.
  • the grayscale control module 5 controls the output grayscale of the corresponding pixel in the second frame by searching the pixel grayscale lookup table:
  • the time count cnt output by the comparison module 4 is always 0, and the gray level control module 5 searches out the pixel gray level lookup table.
  • the output gray level of the corresponding pixel in the second frame picture remains unchanged from the original gray level, that is, the display brightness of the corresponding pixel in the second frame picture keeps the original display brightness unchanged, so as to ensure the display effect of the dynamic picture.
  • the output gray level of the corresponding pixel in the second frame picture searched by the gray scale control module 5 from the pixel gray level lookup table is gradually decreased with increasing time count cnt within a specific time count range. Small, when the time count cnt increases beyond the specific time count range, the output gray level of the corresponding pixel in the second frame picture no longer continues to decrease with the increase of the time count cnt, but keeps the specific time count range
  • the output gray scale is reduced to the minimum. For example, as shown in FIG.
  • the gray scale of the corresponding pixel in the second frame picture can be found from the gray level lookup table as f (cnt , 255), in the specific time counting range, the output gray level is gradually decreased by 255 with the increase of the time count cnt; as shown in FIG. 4, if the gray level of a certain pixel in the first frame picture is 160, Then, the output gray scale of the corresponding pixel in the second frame picture can be found from the gray-scale lookup table as f(cnt, 160), and the output gray scale is gradually reduced by 160 with the increase of the time count cnt in the specific time counting range. small.
  • the present invention further provides a driving method of the AMOLED display, comprising the following steps:
  • Step 1 provides a driving system of an AMOLED display as shown in FIG. 2,
  • the driving system of the AMOLED display includes a data input module 1, a storage module 2 electrically connected to the data input module 1, and an electrical connection module.
  • a first output module 3 of 2 a comparison module 4 electrically connected to the data input module 1 and the storage module 2, a gray scale control module 5 of the electrical connection comparison module 4 and the storage module 2, and an electrical connection gray scale control
  • the second output module 6 of the module 5 The second output module 6 of the module 5.
  • Step 2 The data input module 1 sequentially inputs display data of two adjacent frames, and the display data of the first frame of the adjacent two frames is directly output by the first output module 3 and stored in the storage module. 2, the display data of the second frame picture in the adjacent two frames of pictures enters the comparison module 4.
  • the display data of the adjacent two frames input by the data input module 1 is subjected to a frequency doubling process.
  • Step 3 The comparison module 4 compares each of the first frame pictures of the adjacent two frames Comparing whether the first frame picture and the second frame picture are similar to each other in the display data of the corresponding pixel in the second frame picture, determining whether the second frame picture is a dynamic picture or a static picture with respect to the first frame picture, and outputting a time count cnt .
  • Step 4 The gray scale control module 5 controls the output gray scale of the corresponding pixel in the second frame picture according to the time count cnt and the gray scale of each pixel in the first frame picture.
  • the grayscale control module 5 controls the output gray level of the corresponding pixel in the second frame picture to remain unchanged in the original gray level;
  • the gray-scale control module 5 controls the output gray level of the corresponding pixel in the second frame picture to increase the cnt over time within a specific time count range.
  • the static picture is as shown in FIG. 5 (y1 represents the original display brightness of the still picture, and y2 represents the display brightness after the brightness reduction of the static picture display by the driving system of the present invention) is not perceived by the human eye.
  • the speed is slow to reduce the display brightness, which can reduce the display brightness and power consumption of the static picture without affecting the display effect, and improve the life of the AMOLED display.
  • the grayscale control module 5 has a pixel grayscale lookup table corresponding to a function f (cnt, gray) that uses the time count cnt and the grayscale of each pixel in the first frame as a variable parameter. ), where cnt represents the time count, and gray represents the gray scale of each pixel in the first frame picture.
  • the pixel gray scale lookup table can be set according to image display characteristics such as display brightness, gamma curve, contrast, and the like.
  • the grayscale control module 5 controls the output grayscale of the corresponding pixel in the second frame by searching the pixel grayscale lookup table:
  • the time count cnt output by the comparison module 4 is always 0, and the gray level control module 5 searches out the pixel gray level lookup table.
  • the output gray level of the corresponding pixel in the second frame picture remains unchanged from the original gray level, that is, the display brightness of the corresponding pixel in the second frame picture keeps the original display brightness unchanged, so as to ensure the display effect of the dynamic picture.
  • the gray level control module 5 corresponds to the second frame picture found by the gray level control module 5 from the pixel gray level lookup table
  • the output gray level of the pixel gradually decreases with increasing time count cnt within a certain time count range, and the output of the corresponding pixel in the second frame picture after the time count cnt increases beyond the specific time count range
  • the gray scale no longer continues to decrease with increasing time count cnt, but instead maintains an output gray scale that is minimized within that particular time count range. For example, as shown in FIG.
  • the gray scale of the corresponding pixel in the second frame picture can be found from the gray level lookup table as f (cnt , 255), in the specific time counting range, the output gray level is gradually decreased by 255 with the increase of the time count cnt; as shown in FIG. 4, if the gray level of a certain pixel in the first frame picture is 160, Then, the output gray scale of the corresponding pixel in the second frame picture can be found from the gray-scale lookup table as f(cnt, 160), and the output gray scale is gradually reduced by 160 with the increase of the time count cnt in the specific time counting range. small.
  • Step 5 The second output module 6 outputs display data of the second frame screen processed by the grayscale control module 5.
  • the driving system and method of the AMOLED display of the present invention compares whether the first frame picture and the second frame picture in the adjacent two frames are similar by the comparison module, and determines that the second frame picture is relative to the first frame picture.
  • the dynamic picture is still a static picture, and outputs a time count.
  • the grayscale control module controls the output gray level of the corresponding pixel in the second frame picture according to the time count and the gray level of each pixel in the first frame picture: when the second frame When the picture is a dynamic picture relative to the first frame picture, the gray level control module controls that the output gray level of the corresponding pixel in the second frame picture remains unchanged in the original gray level; when the second frame picture is relative to the first frame When the frame picture is a static picture, the grayscale control module controls the output gray level of the corresponding pixel in the second frame picture to gradually decrease with increasing time count within a specific time count range, thereby making the static
  • the display brightness of the screen is slowly reduced at a speed that is invisible to the human eye, and the display brightness and power consumption of the static picture are reduced without affecting the display effect, and A is improved.
  • the lifetime of MOLED displays is slowly reduced at a speed that is invisible to the human eye, and the display brightness and power consumption of the static picture are reduced without affecting the display effect, and A is improved. The lifetime of MOLED displays.

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Abstract

一种AMOLED显示器的驱动系统及驱动方法，通过对比模块(4)对比相邻两帧画面中第一帧画面与第二帧画面是否相似，判定第二帧画面是动态画面还是静态画面，并输出时间计数(cnt)，通过灰阶控制模块(5)根据时间计数(cnt)与第一帧画面中各个像素的灰阶来控制第二帧画面中对应像素的输出灰阶：当第二帧画面是动态画面时，灰阶控制模块(5)控制第二帧画面中对应像素的输出灰阶保持原始灰阶不变；当第二帧画面是静态画面时，灰阶控制模块(5)控制第二帧画面中对应像素的输出灰阶在一特定的时间计数范围内随着时间计数(cnt)的增大而逐渐减小，从而使得静态画面的显示亮度缓慢降低，既不影响显示效果，又能提高AMOLED显示器的寿命。

Description

AMOLED显示器的驱动系统及驱动方法 技术领域
本发明涉及显示技术领域，尤其涉及一种AMOLED显示器的驱动系统及驱动方法。
背景技术
有机发光二极管(Organic Light Emitting Display，OLED)显示器具有自发光、驱动电压低、发光效率高、响应时间短、清晰度与对比度高、近180°视角、使用温度范围宽，可实现柔性显示与大面积全彩显示等诸多优点，被业界公认为是最有发展潜力的显示器。
OLED显示器按照驱动方式可以分为无源矩阵型OLED(Passive Matrix OLED，PMOLED)和有源矩阵型OLED(Active Matrix OLED，AMOLED)两大类，即直接寻址和薄膜晶体管(Thin Film Transistor，TFT)矩阵寻址两类。其中，AMOLED显示器具有呈阵列式排布的像素，属于主动显示类型，发光效能高，通常用于高清晰度的大尺寸显示装置。
AMOLED显示器通过电流驱动，其像素结构一般包括两个晶体管、一个存储电容、及一个机发光二极管。有机发光二极管是一种电流驱动元件，当有电流流过有机发光二极管时，有机发光二极管发光，且其根据流经的电流大小不同而产生不同程度的亮度。
有机发光二极管通常包括阳极、空穴注入层、空穴传输层、发光层、电子传输层、电子注入层、及阴极。有机发光二极管的显示亮度越高，其内部各层材料的衰减越严重，因此，降低AMOLED显示器的画面显示亮度，可以提高AMOLED显示器寿命。如图1所示，现有的提高AMOLED显示器寿命的方法是将显示画面的亮度整体降低，图1中直线y10表示AMOLED显示器显示画面的原始显示亮度，直线y20表示将AMOLED显示器显示画面的亮度整体降低之后的显示亮度。这种方式虽然能够使AMOLED显示器的寿命得到提高，但是由于整体亮度的降低，AMOLED显示器的显示效果受到影响。
发明内容
本发明的目的在于提供一种AMOLED显示器的驱动系统，能够在不影响显示效果的前提下，降低静态画面的显示亮度与功耗，提高AMOLED显 示器的寿命。
本发明的目的还在于提供一种AMOLED显示器的驱动方法，能够在不影响显示效果的前提下，降低静态画面的显示亮度与功耗，提高AMOLED显示器的寿命。
为实现上述目的，本发明提供一种AMOLED显示器的驱动系统，包括：
数据输入模块，用于先后输入相邻两帧画面的显示数据；
存储模块，其电性连接所述数据输入模块，用于存储所述相邻两帧画面中第一帧画面的显示数据；
第一输出模块，其电性连接所述存储模块，用于直接输出所述相邻两帧画面中第一帧画面的显示数据；
对比模块，其电性连接所述数据输入模块与存储模块，用于对比所述相邻两帧画面中第一帧画面与第二帧画面是否相似，判定第二帧画面相对于第一帧画面是动态画面还是静态画面，并输出时间计数；
灰阶控制模块，其电性连接对比模块与存储模块，用于根据时间计数与第一帧画面中各个像素的灰阶来控制所述第二帧画面中对应像素的输出灰阶；当所述第二帧画面相对于第一帧画面是动态画面时，所述灰阶控制模块控制所述第二帧画面中对应像素的输出灰阶保持原始灰阶不变；当所述第二帧画面相对于第一帧画面是静态画面时，所述灰阶控制模块控制所述第二帧画面中对应像素的输出灰阶在一特定的时间计数范围内随着时间计数的增大而逐渐减小，从而使得静态画面的显示亮度缓慢降低；
以及第二输出模块，其电性连接所述灰阶控制模块，用于输出经所述灰阶控制模块处理过的第二帧画面的显示数据。
所述数据输入模块先后输入的相邻两帧画面的显示数据经过一倍频处理。
所述灰阶控制模块内置像素灰阶查找表，该像素灰阶查找表对应于以时间计数与第一帧画面中各个像素的灰阶为变量参数的函数f(cnt，gray)，其中cnt表示时间计数，gray表示第一帧画面中各个像素的灰阶；所述灰阶控制模块通过查找该像素灰阶查找表来控制第二帧画面中对应像素的输出灰阶。
当所述第二帧画面相对于第一帧画面是动态画面时，所述对比模块输出的时间计数始终为0，所述灰阶控制模块从所述像素灰阶查找表中查找出的第二帧画面中对应像素的输出灰阶保持原始灰阶不变。
当所述第二帧画面相对于第一帧画面是静态画面时，所述对比模块输出的时间计数cnt以0为初值，以1为增量进行迭代累加，即有cnt所述灰 阶控制模块从所述像素灰阶查找表中查找出的第二帧画面中对应像素的输出灰阶在一特定的时间计数范围内随着时间计数的增大而逐渐减小。
本发明还提供一种AMOLED显示器的驱动方法，包括如下步骤：
步骤1、提供一AMOLED显示器的驱动系统；
该AMOLED显示器的驱动系统包括：数据输入模块、电性连接所述数据输入模块的存储模块、电性连接所述存储模块的第一输出模块、电性连接所述数据输入模块与存储模块的对比模块、电性连接对比模块与存储模块的灰阶控制模块、及电性连接灰阶控制模块的第二输出模块；
步骤2、所述数据输入模块先后输入相邻两帧画面的显示数据，所述相邻两帧画面中第一帧画面的显示数据由第一输出模块直接输出并存储于所述存储模块内，所述相邻两帧画面中第二帧画面的显示数据进入所述对比模块；
步骤3、所述对比模块对比所述相邻两帧画面中第一帧画面与第二帧画面是否相似，判定第二帧画面相对于第一帧画面是动态画面还是静态画面，并输出时间计数；
步骤4、所述灰阶控制模块根据时间计数与第一帧画面中各个像素的灰阶来控制所述第二帧画面中对应像素的输出灰阶；当所述第二帧画面相对于第一帧画面是动态画面时，所述灰阶控制模块控制所述第二帧画面中对应像素的输出灰阶保持原始灰阶不变；当所述第二帧画面相对于第一帧画面是静态画面时，所述灰阶控制模块控制所述第二帧画面中对应像素的输出灰阶在一特定的时间计数范围内随着时间计数的增大而逐渐减小；
步骤5、所述第二输出模块输出经所述灰阶控制模块处理过的第二帧画面的显示数据。
所述步骤2中数据输入模块先后输入相邻两帧画面的显示数据经过一倍频处理。
所述灰阶控制模块内置像素灰阶查找表，该像素灰阶查找表对应于以时间计数与第一帧画面中各个像素的灰阶为变量参数的函数f(cnt，gray)，其中cnt表示时间计数，gray表示第一帧画面中各个像素的灰阶；
所述步骤4中，所述灰阶控制模块通过查找该像素灰阶查找表来控制第二帧画面中对应像素的输出灰阶。
当所述步骤3判定第二帧画面相对于第一帧画面是动态画面时，所述对比模块输出的时间计数始终为0，所述步骤4中的灰阶控制模块从所述像素灰阶查找表中查找出的第二帧画面中对应像素的输出灰阶保持原始灰阶不变。
当所述步骤3判定第二帧画面相对于第一帧画面是静态画面时，所述对比模块输出的时间计数以0为初值，以1为增量进行迭代累加，所述步骤4中的灰阶控制模块从所述像素灰阶查找表中查找出的第二帧画面中对应像素的输出灰阶在一特定的时间计数范围内随着时间计数的增大而逐渐减小。
本发明还提供一种AMOLED显示器的驱动系统，包括：
数据输入模块，用于先后输入相邻两帧画面的显示数据；
存储模块，其电性连接所述数据输入模块，用于存储所述相邻两帧画面中第一帧画面的显示数据；
第一输出模块，其电性连接所述存储模块，用于直接输出所述相邻两帧画面中第一帧画面的显示数据；
对比模块，其电性连接所述数据输入模块与存储模块，用于对比所述相邻两帧画面中第一帧画面与第二帧画面是否相似，判定第二帧画面相对于第一帧画面是动态画面还是静态画面，并输出时间计数；
灰阶控制模块，其电性连接对比模块与存储模块，用于根据时间计数与第一帧画面中各个像素的灰阶来控制所述第二帧画面中对应像素的输出灰阶；当所述第二帧画面相对于第一帧画面是动态画面时，所述灰阶控制模块控制所述第二帧画面中对应像素的输出灰阶保持原始灰阶不变；当所述第二帧画面相对于第一帧画面是静态画面时，所述灰阶控制模块控制所述第二帧画面中对应像素的输出灰阶在一特定的时间计数范围内随着时间计数的增大而逐渐减小，从而使得静态画面的显示亮度缓慢降低；
以及第二输出模块，其电性连接所述灰阶控制模块，用于输出经所述灰阶控制模块处理过的第二帧画面的显示数据；
其中，所述数据输入模块先后输入的相邻两帧画面的显示数据经过一倍频处理；
其中，所述灰阶控制模块内置像素灰阶查找表，该像素灰阶查找表对应于以时间计数与第一帧画面中各个像素的灰阶为变量参数的函数f(cnt，gray)，其中cnt表示时间计数，gray表示第一帧画面中各个像素的灰阶；所述灰阶控制模块通过查找该像素灰阶查找表来控制第二帧画面中对应像素的输出灰阶；
其中，当所述第二帧画面相对于第一帧画面是动态画面时，所述对比模块输出的时间计数始终为0，所述灰阶控制模块从所述像素灰阶查找表中查找出的第二帧画面中对应像素的输出灰阶保持原始灰阶不变。
本发明的有益效果：本发明提供的一种AMOLED显示器的驱动系统及 方法，通过对比模块对比相邻两帧画面中第一帧画面与第二帧画面是否相似，判定第二帧画面相对于第一帧画面是动态画面还是静态画面，并输出时间计数，通过灰阶控制模块根据时间计数与第一帧画面中各个像素的灰阶来控制第二帧画面中对应像素的输出灰阶：当所述第二帧画面相对于第一帧画面是动态画面时，所述灰阶控制模块控制所述第二帧画面中对应像素的输出灰阶保持原始灰阶不变；当所述第二帧画面相对于第一帧画面是静态画面时，所述灰阶控制模块控制所述第二帧画面中对应像素的输出灰阶在一特定的时间计数范围内随着时间计数的增大而逐渐减小，从而使得静态画面的显示亮度以人眼感觉不到的速度缓慢降低，实现了在不影响显示效果的前提下，降低静态画面的显示亮度与功耗，提高AMOLED显示器的寿命。
为了能更进一步了解本发明的特征以及技术内容，请参阅以下有关本发明的详细说明与附图，然而附图仅提供参考与说明用，并非用来对本发明加以限制。
附图说明
下面结合附图，通过对本发明的具体实施方式详细描述，将使本发明的技术方案及其它有益效果显而易见。
附图中，
图1为现有的通过将显示画面的亮度整体降低来提高AMOLED显示器寿命的示意图；
图2为本发明AMOLED显示器的驱动系统的结构框图；
图3、图4为本发明AMOLED显示器的驱动系统中像素灰阶查找表的两个示例；
图5为通过本发明AMOLED显示器的驱动系统降低静态画面显示亮度的示意图；
图6为本发明的AMOLED显示器的驱动方法的流程图。
具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果，以下结合本发明的优选实施例及其附图进行详细描述。
请参阅图2，本发明提供一种AMOLED显示器的驱动系统，包括：数据输入模块1、电性连接所述数据输入模块1的存储模块2、电性连接所述存储模块2的第一输出模块3、电性连接所述数据输入模块1与存储模块2 的对比模块4、电性连接对比模块4与存储模块2的灰阶控制模块5、及电性连接灰阶控制模块5的第二输出模块6。
所述数据输入模块1用于先后输入相邻两帧画面的显示数据。值得一提的是，所述数据输入模块1先后输入的相邻两帧画面的显示数据经过一倍频处理，即将AMOLED显示器的驱动频率提高到原驱动频率的两倍，使得原来仅供显示一帧画面的时间内能够显示相邻的两帧画面。
所述存储模块2用于存储所述相邻两帧画面中第一帧画面的显示数据。
所述第一输出模块3用于直接输出所述相邻两帧画面中第一帧画面的显示数据。
所述对比模块4通过比较所述相邻两帧画面的第一帧画面中各个像素与第二帧画面中对应像素的显示数据来对比第一帧画面与第二帧画面是否相似，判定第二帧画面相对于第一帧画面是动态画面还是静态画面，并输出时间计数cnt。具体的，若第一帧画面与第二帧画面不相似，则判定第二帧画面相对于第一帧画面是动态画面，此种情况下，所述对比模块4输出的时间计数cnt始终为0；若第一帧画面与第二帧画面相似，则判定第二帧画面相对于第一帧画面是静态画面，此种情况下，所述对比模块4输出的时间计数cnt以0为初值，以1为增量进行迭代累加，即cnt＝cnt+1。
所述灰阶控制模块5用于根据时间计数cnt与第一帧画面中各个像素的灰阶来控制所述第二帧画面中对应像素的输出灰阶：当所述第二帧画面相对于第一帧画面是动态画面时，所述灰阶控制模块5控制所述第二帧画面中对应像素的输出灰阶保持原始灰阶不变；当所述第二帧画面相对于第一帧画面是静态画面时，所述灰阶控制模块5控制所述第二帧画面中对应像素的输出灰阶在一特定的时间计数范围内随着时间计数cnt的增大而逐渐减小，从而使得静态画面如图5所示(y1代表静态画面的原始显示亮度，y2代表通过本发明的驱动系统对静态画面显示亮度降低后的显示亮度)以人眼感觉不到的速度缓慢降低显示亮度，能够实现在不影响显示效果的前提下，降低静态画面的显示亮度与功耗，提高AMOLED显示器的寿命。
所述第二输出模块6用于输出经所述灰阶控制模块5处理过的第二帧画面的显示数据。
需要重点说明的是，所述灰阶控制模块5内置像素灰阶查找表，该像素灰阶查找表对应于以时间计数cnt与第一帧画面中各个像素的灰阶为变量参数的函数f(cnt，gray)，其中cnt表示时间计数，gray表示第一帧画面中各个像素的灰阶。所述像素灰阶查找表可以根据显示亮度、Gamma曲线、对比度等图像显示特征进行设定。
所述灰阶控制模块5通过查找该像素灰阶查找表来控制第二帧画面中对应像素的输出灰阶：
当所述第二帧画面相对于第一帧画面是动态画面时，所述对比模块4输出的时间计数cnt始终为0，所述灰阶控制模块5从所述像素灰阶查找表中查找出的第二帧画面中对应像素的输出灰阶保持原始灰阶不变，即第二帧画面中对应像素的显示亮度保持原始显示亮度不变，以保证动态画面的显示效果。
而当所述第二帧画面相对于第一帧画面是静态画面时，所述对比模块4输出的时间计数cnt以0为初值，以1为增量进行迭代累加，即cnt＝cnt+1，所述灰阶控制模块5从所述像素灰阶查找表中查找出的第二帧画面中对应像素的输出灰阶在一特定的时间计数范围内随着时间计数cnt的增大而逐渐减小，当时间计数cnt增大到超出该特定时间计数范围之后，第二帧画面中对应像素的输出灰阶不再随着时间计数cnt的增大继续减小，而是保持该特定时间计数范围内减到最小的输出灰阶。例如：如图3所示，若所述第一帧画面中某个像素的灰阶为255，则能够从灰阶查找表中查找到第二帧画面中对应像素的输出灰阶为f(cnt，255)，在特定时间计数范围内输出灰阶由255随着时间计数cnt的增大逐渐减小；如图4所示，若所述第一帧画面中某个像素的灰阶为160，则能够从灰阶查找表中查找到第二帧画面中对应像素的输出灰阶为f(cnt，160)，在特定时间计数范围内输出灰阶由160随着时间计数cnt的增大逐渐减小。
请参阅图6，在上述AMOLED显示器的驱动系统的基础上，本发明还提供一种AMOLED显示器的驱动方法，包括如下步骤：
步骤1、提供一如图2所示的AMOLED显示器的驱动系统，该AMOLED显示器的驱动系统包括数据输入模块1、电性连接所述数据输入模块1的存储模块2、电性连接所述存储模块2的第一输出模块3、电性连接所述数据输入模块1与存储模块2的对比模块4、电性连接对比模块4与存储模块2的灰阶控制模块5、及电性连接灰阶控制模块5的第二输出模块6。
步骤2、所述数据输入模块1先后输入相邻两帧画面的显示数据，所述相邻两帧画面中第一帧画面的显示数据由第一输出模块3直接输出并存储于所述存储模块2内，所述相邻两帧画面中第二帧画面的显示数据进入所述对比模块4。
值得一提的是，所述数据输入模块1先后输入的相邻两帧画面的显示数据经过一倍频处理。
步骤3、所述对比模块4通过比较所述相邻两帧画面的第一帧画面中各 个像素与第二帧画面中对应像素的显示数据来对比第一帧画面与第二帧画面是否相似，判定第二帧画面相对于第一帧画面是动态画面还是静态画面，并输出时间计数cnt。
具体的，若第一帧画面与第二帧画面不相似，则判定第二帧画面相对于第一帧画面是动态画面，此种情况下，所述对比模块4输出的时间计数cnt始终为0；若第一帧画面与第二帧画面相似，则判定第二帧画面相对于第一帧画面是静态画面，此种情况下，所述对比模块4输出的时间计数cnt以0为初值，以1为增量进行迭代累加，即cnt＝cnt+1。
步骤4、所述灰阶控制模块5根据时间计数cnt与第一帧画面中各个像素的灰阶来控制所述第二帧画面中对应像素的输出灰阶。
当所述第二帧画面相对于第一帧画面是动态画面时，所述灰阶控制模块5控制所述第二帧画面中对应像素的输出灰阶保持原始灰阶不变；当所述第二帧画面相对于第一帧画面是静态画面时，所述灰阶控制模块5控制所述第二帧画面中对应像素的输出灰阶在一特定的时间计数范围内随着时间计数cnt的增大而逐渐减小，从而使得静态画面如图5所示(y1代表静态画面的原始显示亮度，y2代表通过本发明的驱动系统对静态画面显示亮度降低后的显示亮度)以人眼感觉不到的速度缓慢降低显示亮度，能够实现在不影响显示效果的前提下，降低静态画面的显示亮度与功耗，提高AMOLED显示器的寿命。
具体地，所述灰阶控制模块5内置像素灰阶查找表，该像素灰阶查找表对应于以时间计数cnt与第一帧画面中各个像素的灰阶为变量参数的函数f(cnt，gray)，其中cnt表示时间计数，gray表示第一帧画面中各个像素的灰阶。所述像素灰阶查找表可以根据显示亮度、Gamma曲线、对比度等图像显示特征进行设定。
所述灰阶控制模块5通过查找该像素灰阶查找表来控制第二帧画面中对应像素的输出灰阶：
当所述第二帧画面相对于第一帧画面是动态画面时，所述对比模块4输出的时间计数cnt始终为0，所述灰阶控制模块5从所述像素灰阶查找表中查找出的第二帧画面中对应像素的输出灰阶保持原始灰阶不变，即第二帧画面中对应像素的显示亮度保持原始显示亮度不变，以保证动态画面的显示效果。
而当所述第二帧画面相对于第一帧画面是静态画面时，所述对比模块4输出的时间计数cnt以0为初值，以1为增量进行迭代累加，即cnt＝cnt+1，所述灰阶控制模块5从所述像素灰阶查找表中查找出的第二帧画面中对应 像素的输出灰阶在一特定的时间计数范围内随着时间计数cnt的增大而逐渐减小，当时间计数cnt增大到超出该特定时间计数范围之后，第二帧画面中对应像素的输出灰阶不再随着时间计数cnt的增大继续减小，而是保持该特定时间计数范围内减到最小的输出灰阶。例如：如图3所示，若所述第一帧画面中某个像素的灰阶为255，则能够从灰阶查找表中查找到第二帧画面中对应像素的输出灰阶为f(cnt，255)，在特定时间计数范围内输出灰阶由255随着时间计数cnt的增大逐渐减小；如图4所示，若所述第一帧画面中某个像素的灰阶为160，则能够从灰阶查找表中查找到第二帧画面中对应像素的输出灰阶为f(cnt，160)，在特定时间计数范围内输出灰阶由160随着时间计数cnt的增大逐渐减小。
步骤5、所述第二输出模块6输出经所述灰阶控制模块5处理过的第二帧画面的显示数据。
综上所述，本发明的AMOLED显示器的驱动系统及方法，通过对比模块对比相邻两帧画面中第一帧画面与第二帧画面是否相似，判定第二帧画面相对于第一帧画面是动态画面还是静态画面，并输出时间计数，通过灰阶控制模块根据时间计数与第一帧画面中各个像素的灰阶来控制第二帧画面中对应像素的输出灰阶：当所述第二帧画面相对于第一帧画面是动态画面时，所述灰阶控制模块控制所述第二帧画面中对应像素的输出灰阶保持原始灰阶不变；当所述第二帧画面相对于第一帧画面是静态画面时，所述灰阶控制模块控制所述第二帧画面中对应像素的输出灰阶在一特定的时间计数范围内随着时间计数的增大而逐渐减小，从而使得静态画面的显示亮度以人眼感觉不到的速度缓慢降低，实现了在不影响显示效果的前提下，降低静态画面的显示亮度与功耗，提高AMOLED显示器的寿命。
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明权利要求的保护范围。

Claims (12)

  1. 一种AMOLED显示器的驱动系统，包括：
    数据输入模块，用于先后输入相邻两帧画面的显示数据；
    存储模块，其电性连接所述数据输入模块，用于存储所述相邻两帧画面中第一帧画面的显示数据；
    第一输出模块，其电性连接所述存储模块，用于直接输出所述相邻两帧画面中第一帧画面的显示数据；
    对比模块，其电性连接所述数据输入模块与存储模块，用于对比所述相邻两帧画面中第一帧画面与第二帧画面是否相似，判定第二帧画面相对于第一帧画面是动态画面还是静态画面，并输出时间计数；
    灰阶控制模块，其电性连接对比模块与存储模块，用于根据时间计数与第一帧画面中各个像素的灰阶来控制所述第二帧画面中对应像素的输出灰阶；当所述第二帧画面相对于第一帧画面是动态画面时，所述灰阶控制模块控制所述第二帧画面中对应像素的输出灰阶保持原始灰阶不变；当所述第二帧画面相对于第一帧画面是静态画面时，所述灰阶控制模块控制所述第二帧画面中对应像素的输出灰阶在一特定的时间计数范围内随着时间计数的增大而逐渐减小，从而使得静态画面的显示亮度缓慢降低；
    以及第二输出模块，其电性连接所述灰阶控制模块，用于输出经所述灰阶控制模块处理过的第二帧画面的显示数据。
  2. 如权利要求1所述的AMOLED显示器的驱动系统，其中，所述数据输入模块先后输入的相邻两帧画面的显示数据经过一倍频处理。
  3. 如权利要求1所述的AMOLED显示器的驱动系统，其中，所述灰阶控制模块内置像素灰阶查找表，该像素灰阶查找表对应于以时间计数与第一帧画面中各个像素的灰阶为变量参数的函数f(cnt，gray)，其中cnt表示时间计数，gray表示第一帧画面中各个像素的灰阶；所述灰阶控制模块通过查找该像素灰阶查找表来控制第二帧画面中对应像素的输出灰阶。
  4. 如权利要求3所述的AMOLED显示器的驱动系统，其中，当所述第二帧画面相对于第一帧画面是动态画面时，所述对比模块输出的时间计数始终为0，所述灰阶控制模块从所述像素灰阶查找表中查找出的第二帧画面中对应像素的输出灰阶保持原始灰阶不变。
  5. 如权利要求4所述的AMOLED显示器的驱动系统，其中，当所述第二帧画面相对于第一帧画面是静态画面时，所述对比模块输出的时间计 数以0为初值，以1为增量进行迭代累加，所述灰阶控制模块从所述像素灰阶查找表中查找出的第二帧画面中对应像素的输出灰阶在一特定的时间计数范围内随着时间计数的增大而逐渐减小。
  6. 一种AMOLED显示器的驱动方法，包括如下步骤：
    步骤1、提供一AMOLED显示器的驱动系统；
    该AMOLED显示器的驱动系统包括：数据输入模块、电性连接所述数据输入模块的存储模块、电性连接所述存储模块的第一输出模块、电性连接所述数据输入模块与存储模块的对比模块、电性连接对比模块与存储模块的灰阶控制模块、及电性连接灰阶控制模块的第二输出模块；
    步骤2、所述数据输入模块先后输入相邻两帧画面的显示数据，所述相邻两帧画面中第一帧画面的显示数据由第一输出模块直接输出并存储于所述存储模块内，所述相邻两帧画面中第二帧画面的显示数据进入所述对比模块；
    步骤3、所述对比模块对比所述相邻两帧画面中第一帧画面与第二帧画面是否相似，判定第二帧画面相对于第一帧画面是动态画面还是静态画面，并输出时间计数；
    步骤4、所述灰阶控制模块根据时间计数与第一帧画面中各个像素的灰阶来控制所述第二帧画面中对应像素的输出灰阶；当所述第二帧画面相对于第一帧画面是动态画面时，所述灰阶控制模块控制所述第二帧画面中对应像素的输出灰阶保持原始灰阶不变；当所述第二帧画面相对于第一帧画面是静态画面时，所述灰阶控制模块控制所述第二帧画面中对应像素的输出灰阶在一特定的时间计数范围内随着时间计数的增大而逐渐减小；
    步骤5、所述第二输出模块输出经所述灰阶控制模块处理过的第二帧画面的显示数据。
  7. 如权利要求6所述的AMOLED显示器的驱动方法，其中，所述步骤2中数据输入模块先后输入相邻两帧画面的显示数据经过一倍频处理。
  8. 如权利要求6所述的AMOLED显示器的驱动方法，其中，所述灰阶控制模块内置像素灰阶查找表，该像素灰阶查找表对应于以时间计数与第一帧画面中各个像素的灰阶为变量参数的函数f(cnt，gray)，其中cnt表示时间计数，gray表示第一帧画面中各个像素的灰阶；
    所述步骤4中，所述灰阶控制模块通过查找该像素灰阶查找表来控制第二帧画面中对应像素的输出灰阶。
  9. 如权利要求8所述的AMOLED显示器的驱动方法，其中，当所述步骤3判定第二帧画面相对于第一帧画面是动态画面时，所述对比模块输 出的时间计数始终为0，所述步骤4中的灰阶控制模块从所述像素灰阶查找表中查找出的第二帧画面中对应像素的输出灰阶保持原始灰阶不变。
  10. 如权利要求8所述的AMOLED显示器的驱动方法，其中，当所述步骤3判定第二帧画面相对于第一帧画面是静态画面时，所述对比模块输出的时间计数以0为初值，以1为增量进行迭代累加，所述步骤4中的灰阶控制模块从所述像素灰阶查找表中查找出的第二帧画面中对应像素的输出灰阶在一特定的时间计数范围内随着时间计数的增大而逐渐减小。
  11. 一种AMOLED显示器的驱动系统，包括：
    数据输入模块，用于先后输入相邻两帧画面的显示数据；
    存储模块，其电性连接所述数据输入模块，用于存储所述相邻两帧画面中第一帧画面的显示数据；
    第一输出模块，其电性连接所述存储模块，用于直接输出所述相邻两帧画面中第一帧画面的显示数据；
    对比模块，其电性连接所述数据输入模块与存储模块，用于对比所述相邻两帧画面中第一帧画面与第二帧画面是否相似，判定第二帧画面相对于第一帧画面是动态画面还是静态画面，并输出时间计数；
    灰阶控制模块，其电性连接对比模块与存储模块，用于根据时间计数与第一帧画面中各个像素的灰阶来控制所述第二帧画面中对应像素的输出灰阶；当所述第二帧画面相对于第一帧画面是动态画面时，所述灰阶控制模块控制所述第二帧画面中对应像素的输出灰阶保持原始灰阶不变；当所述第二帧画面相对于第一帧画面是静态画面时，所述灰阶控制模块控制所述第二帧画面中对应像素的输出灰阶在一特定的时间计数范围内随着时间计数的增大而逐渐减小，从而使得静态画面的显示亮度缓慢降低；
    以及第二输出模块，其电性连接所述灰阶控制模块，用于输出经所述灰阶控制模块处理过的第二帧画面的显示数据；
    其中，所述数据输入模块先后输入的相邻两帧画面的显示数据经过一倍频处理；
    其中，所述灰阶控制模块内置像素灰阶查找表，该像素灰阶查找表对应于以时间计数与第一帧画面中各个像素的灰阶为变量参数的函数f(cnt，gray)，其中cnt表示时间计数，gray表示第一帧画面中各个像素的灰阶；所述灰阶控制模块通过查找该像素灰阶查找表来控制第二帧画面中对应像素的输出灰阶；
    其中，当所述第二帧画面相对于第一帧画面是动态画面时，所述对比模块输出的时间计数始终为0，所述灰阶控制模块从所述像素灰阶查找表中 查找出的第二帧画面中对应像素的输出灰阶保持原始灰阶不变。
  12. 如权利要求11所述的AMOLED显示器的驱动系统，其中，当所述第二帧画面相对于第一帧画面是静态画面时，所述对比模块输出的时间计数以0为初值，以1为增量进行迭代累加，所述灰阶控制模块从所述像素灰阶查找表中查找出的第二帧画面中对应像素的输出灰阶在一特定的时间计数范围内随着时间计数的增大而逐渐减小。
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