CN117831458A - Display device driving method and display device - Google Patents
Display device driving method and display device Download PDFInfo
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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]
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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
- G09G3/2007—Display of intermediate tones
- G09G3/2074—Display of intermediate tones using sub-pixels
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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
- G09G3/34—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 by control of light from an independent source
- G09G3/3433—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 by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
- G09G3/344—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 by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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Abstract
The application discloses a display device's drive method and display device, display device includes a plurality of pixel district, and every pixel district includes three OLED sub-pixel and an electronic paper pixel, and drive method includes the step: acquiring gray-scale data of three OLED sub-pixels; judging and comparing the gray-scale data of the three OLED sub-pixels, if the gray-scale data of the three OLED sub-pixels are the same, generating corresponding gray-scale data to the electronic paper pixels to drive the electronic paper pixels to display, and if the gray-scale data of any one OLED sub-pixel is different from the gray-scale data of the other two OLED sub-pixels, generating corresponding gray-scale data to the three OLED sub-pixels to drive the three OLED sub-pixels to display; wherein the three OLED sub-pixels are different in color. According to the method, the electronic paper pixels are added in the OLED panel, and the electronic paper pixels and the OLED sub-pixels are alternately displayed in different states, so that the attenuation of the OLED sub-pixels is reduced, the power consumption of the OLED panel is reduced, and the service life is prolonged.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a driving method of a display device and a display device.
Background
Along with the increasing requirements of people on display quality, the LCD panel products cannot meet the requirements of Light, thin, quick response, low power consumption and the like, and the OLED (Organic Light-Emitting Diode) display technology gradually becomes the mainstream display technology by virtue of the advantages of fast response speed, wide working temperature range, high contrast, large visual angle, ultrathin panel, capability of realizing flexible display, light transmission display and the like.
In order to maintain a certain brightness, the backlight brightness has to be increased, thereby also increasing the backlight power consumption. Therefore, the development trend of high resolution and high color saturation of the display screen leads to the increasing of power consumption of the mobile phone, the current battery capacity can not meet the requirements, the standby time of the mobile phone is greatly shortened, and the OLED panel is easy to age due to the reasons of luminous efficiency and service life, so that the life cycle of the product is influenced.
Disclosure of Invention
The application aims to provide a driving method of a display device and the display device, which can reduce the power consumption of an OLED display panel and prolong the service life.
The application discloses a driving method of a display device, the display device includes a plurality of pixel areas, each pixel area includes three OLED sub-pixels and one electronic paper pixel, the driving method includes the steps:
acquiring gray-scale data of three OLED sub-pixels; and
judging and comparing the gray-scale data of the three OLED sub-pixels, if the gray-scale data of the three OLED sub-pixels are the same, generating corresponding gray-scale data to the electronic paper pixels to drive the electronic paper pixels to display, and if the gray-scale data of any one OLED sub-pixel is different from the gray-scale data of the other two OLED sub-pixels, generating corresponding gray-scale data to the three OLED sub-pixels to drive the three OLED sub-pixels to display;
wherein the three OLED sub-pixels are different in color.
Optionally, the display device includes a brightness detection module and a brightness compensation module, the brightness detection module is connected with the brightness compensation module, the brightness compensation module controls the light emitting brightness of the electronic paper pixel, the judging compares the gray scale data of the three OLED sub-pixels, if the gray scale data of the three OLED sub-pixels are the same, the corresponding gray scale data is generated to the electronic paper pixel to drive the electronic paper pixel to display, if the gray scale data of any one OLED sub-pixel is different from the gray scale data of the other two OLED sub-pixels, the corresponding gray scale data is generated to the three OLED sub-pixels, and the step of driving the three OLED sub-pixels to display includes:
the brightness detection module detects and acquires actual display brightness L1 after light mixing of three OLED sub-pixels, compares the actual display brightness with display brightness L2 after light mixing of gray scales corresponding to the three OLED sub-pixels, and drives the three OLED sub-pixels to display if L1 is smaller than or equal to L2 and gray scale data of any one OLED sub-pixel is different from gray scale data of other two OLED sub-pixels; and
and the brightness compensation module obtains a compensation value according to the difference value of the L1 and the L2, and controls the luminous brightness of the electronic paper pixel through the compensation value.
Optionally, the display device includes a light intensity sensor, where the light intensity sensor is used to detect brightness of ambient light, and the driving method further includes the following steps:
detecting the brightness of external environment light, if the brightness value is larger than a preset brightness value, directly starting an electronic paper pixel, and closing an OLED sub-pixel; if the brightness is smaller than or equal to a preset brightness value, gray-scale data of three OLED sub-pixels are obtained, the gray-scale data of the three OLED sub-pixels are judged and compared, if the gray-scale data of the three OLED sub-pixels are the same, corresponding gray-scale data are generated to the electronic paper pixels so as to drive the electronic paper pixels to display, and if the gray-scale data of any one OLED sub-pixel are different from the gray-scale data of the other two OLED sub-pixels, corresponding gray-scale data are generated to the three OLED sub-pixels so as to drive the three OLED sub-pixels to display;
wherein, the electronic paper pixel is formed by using a color electronic paper material.
Optionally, along the data line direction of the OLED sub-pixels, the display device is divided into a plurality of partitions, each partition includes at least one row of pixels, the brightness compensation module obtains a compensation value according to the difference between L1 and L2, and the step of controlling the light emitting brightness of the electronic paper pixels through the compensation value includes:
and obtaining a compensation value according to the difference value of L1 and L2 and the difference value of the current of the pixel in the upper row and the current of the pixel in the lower row, and controlling the luminous brightness of the pixel of the electronic paper through the compensation value.
Optionally, the display device includes a first area and a second area, the first area is disposed around the second area, and the second area is a two-dimensional code area, and the driving method includes the steps of:
judging whether the current pixel belongs to a second area, and if so, simultaneously starting an OLED sub-pixel and an electronic paper pixel; and if the gray-scale data of any one OLED sub-pixel is different from the gray-scale data of other two OLED sub-pixels, generating corresponding gray-scale data to the three OLED sub-pixels to drive the three OLED sub-pixels to display.
The application also discloses a display device, uses the drive method of arbitrary one above to drive, display device includes a plurality of pixel areas, and every pixel area includes three OLED sub-pixel and an electronic paper pixel, every OLED sub-pixel all is equipped with independent positive pole, electronic paper pixel includes first electrode, second electrode and electronic capsule, display device includes data driving module and gray scale data acquisition judgement output module, gray scale data acquisition judgement output module is according to the gray scale data of data driving module output, control OLED sub-pixel and electronic paper pixel's drive demonstration.
Optionally, the display device includes a brightness detection module and a brightness compensation module, where the brightness detection module is connected with the data driving module and the brightness compensation module, the brightness compensation module is connected with the gray-scale data acquisition and judgment output module, the brightness detection module detects the actual display brightness, outputs a control signal to the brightness compensation module according to a comparison result of the actual display brightness and the display brightness of the corresponding gray scale, and controls the gray-scale data acquisition and judgment output module to output a driving voltage to the corresponding OLED sub-pixel or electronic paper pixel through a compensation value.
Optionally, the three OLED sub-pixels are respectively a red sub-pixel, a green sub-pixel and a blue sub-pixel, the area of the blue sub-pixel is larger than that of the red sub-pixel or the green sub-pixel, the three OLED sub-pixels are arranged in a triangle, and the electronic paper pixels are arranged in a column.
Optionally, the display device includes a current detection module, the current detection module detects a current value of each row of OLED subpixels and calculates to obtain a difference value of current values of two adjacent rows, and the brightness compensation module generates a brightness compensation value of a next row of pixels according to a comparison result of actual display brightness and display brightness corresponding to gray scale and the difference value of the current values of the two adjacent rows, and drives the pixels of the electronic paper.
Optionally, along the scanning line direction, the electronic pixels are arranged between any two adjacent OLED sub-pixels, along the data line direction, the first electrodes of the any two adjacent electronic paper pixels are spaced from each other, and the second electrodes are communicated with each other; wherein the second electrode is a common electrode.
Compared with the existing OLED panel, the electronic paper pixel is added into the OLED panel, and each OLED pixel consists of three OLED sub-pixels with different colors and one electronic paper sub-pixel E; the anode of each OLED sub-pixel is independently controlled, the electronic paper sub-pixel E is also independently controlled by an electrode, and the electronic paper pixel is added to alternately display the electronic paper sub-pixel and the OLED sub-pixel in different states, so that the attenuation of the OLED sub-pixel is reduced, the power consumption of an OLED panel is reduced, and the service life is prolonged.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive faculty for a person skilled in the art. In the drawings:
fig. 1 is a schematic flow chart of a driving method of a display device according to a first embodiment of the present application;
FIG. 2 is a schematic flow chart of a driving method according to a second embodiment of the present application;
FIG. 3 is a schematic flow chart of a driving method according to a third embodiment of the present application;
fig. 4 is a schematic view of a pixel structure of a display device according to a fourth embodiment of the present application;
fig. 5 is a schematic structural view of a display device of a fifth embodiment of the present application;
fig. 6 is a schematic view of a pixel structure of a display device according to a fifth embodiment of the present application;
fig. 7 is a schematic structural view of a display device of a sixth embodiment of the present application;
fig. 8 is a schematic structural view of a display device of a seventh embodiment of the present application;
fig. 9 is a schematic structural view of a display device of an eighth embodiment of the present application.
100, a display device; 101. a first region; 102. a second region; 110. a pixel region; 120. an OLED sub-pixel; 121. an anode; 122. a cathode; 123. an organic light emitting layer; 130. electronic paper pixels; 131. a first electrode; 132. an electronic capsule; 133. a second electrode; 140. an encapsulation layer; 150. a flat layer; 160. a data driving module; 170. the gray-scale data acquisition, judgment and output module; 180. a brightness detection module; 190. a brightness compensation module; 200. a current detection module; 210. and a light intensity sensor.
Detailed Description
It should be understood that the terminology, specific structural and functional details disclosed herein are merely representative for purposes of describing particular embodiments, but that the application may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.
The present application is described in detail below with reference to the attached drawings and alternative embodiments.
Example 1:
as a first embodiment of the present application, as shown in fig. 1, there is disclosed a driving method of a display device including a plurality of pixel regions each including three OLED sub-pixels and one electronic paper pixel, characterized by comprising the steps of:
s1: acquiring gray-scale data of three OLED sub-pixels; and
s2: judging and comparing the gray-scale data of the three OLED sub-pixels, if the gray-scale data of the three OLED sub-pixels are the same, generating corresponding gray-scale data to the electronic paper pixels to drive the electronic paper pixels to display, and if the gray-scale data of any one OLED sub-pixel is different from the gray-scale data of the other two OLED sub-pixels, generating corresponding gray-scale data to the three OLED sub-pixels to drive the three OLED sub-pixels to display;
wherein the three OLED sub-pixels are different in color.
In the embodiment, three OLED sub-pixels and one electronic paper pixel are arranged in a pixel area, the electronic paper pixel (EPD) and the OLED sub-pixels are respectively and independently controlled by corresponding thin film transistors, and are respectively and independently designed, namely, the resolution and the refresh rate are independent, and the design is carried out according to actual conditions; considering that the service life of the OLED sub-pixels is reduced due to long-time continuous use, the electronic paper pixels are added to replace part of the working time of the OLED sub-pixels, so that the continuous use of the OLED sub-pixels is avoided, and in order to ensure the display effect, gray-scale data of three OLED sub-pixels are usually acquired firstly when the OLED sub-pixels are switched; judging and comparing the gray-scale data of the three OLED sub-pixels, if the gray-scale data of any two OLED sub-pixels are the same, namely, the gray-scale data of the three OLED sub-pixels are the same, generating corresponding gray-scale data to the electronic paper pixels so as to drive the electronic paper pixels to display, and if the gray-scale data of any one OLED sub-pixel is different from the gray-scale data of the other two OLED sub-pixels, driving the three OLED sub-pixels to display, namely, in part of display time, the display effect of the electronic paper pixels and the three OLED sub-pixels is the same, so that the electronic paper pixels can be used for replacing the OLED sub-pixels to display, and the electronic paper pixels and the OLED sub-pixels can be alternately displayed in different states, thereby reducing the attenuation of the OLED sub-pixels, simultaneously reducing the power consumption of an OLED panel and prolonging the service life.
Example 2:
as shown in fig. 2, as a second embodiment of the present application, further refinement and perfection of the first embodiment are provided, in consideration of a situation that there may be insufficient brightness at the time of displaying an OLED subpixel, in this problem, the present embodiment may increase the brightness of the OLED subpixel by activating an electronic paper pixel, where the electronic paper pixel may replace not only the OLED subpixel for displaying, but also be used as a backlight, to increase the brightness of the OLED subpixel, and the display device includes a brightness detection module and a brightness compensation module, where the brightness detection module is connected to the brightness compensation module, and the brightness compensation module controls the light emitting brightness of the electronic paper pixel, where the step S2 includes:
s21: the brightness detection module detects and acquires actual display brightness L1 after light mixing of three OLED sub-pixels, compares the actual display brightness with display brightness L2 after light mixing of gray scales corresponding to the three OLED sub-pixels, and drives the three OLED sub-pixels to display if L1 is smaller than or equal to L2 and gray scale data of any one OLED sub-pixel is different from gray scale data of other two OLED sub-pixels; and
s22: and the brightness compensation module obtains a compensation value according to the difference value of the L1 and the L2, and controls the luminous brightness of the electronic paper pixel through the compensation value.
When the display device displays, the ideal value cannot be reached when the light emitted by the OLED reaches the display surface due to the film thickness or the temperature of the backlight, in this case, the light-emitting brightness of the organic light-emitting layer is generally increased at present, but the power consumption is further increased, the work of the OLED with higher power is easier to accelerate aging, and in the display of the OLED sub-pixels, the electronic paper pixels can be started according to the difference value between the actual brightness and the display brightness (ideal brightness) after the corresponding gray scale light mixing, the light-emitting brightness of the OLED sub-pixels is compensated through the electronic paper pixels, and the display effect is improved.
Further, it is also considered that when the power supply voltage is input to each row of OLED pixels, due to the effect of impedance, after the last row is turned on, the supply of the LEVDD power will be split to the OLED of the last row, and the current is I1, then the supply of the next row will not be LEVDD, but LEVDD-I1R, and similarly, it will be known that each row will be so that the supply voltage will be gradually reduced, resulting in uneven brightness display, and the OLED sub-pixels will be along the data line direction of the OLED sub-pixels, and the display device is divided into a plurality of partitions, each partition includes at least one row of pixels, and the step S22 includes:
and obtaining a compensation value according to the difference value of L1 and L2 and the difference value of the current of the pixel in the upper row and the current of the pixel in the lower row, and controlling the luminous brightness of the pixel of the electronic paper through the compensation value.
The influence of impedance is considered, and meanwhile, the difference between the actual brightness and the ideal brightness is used for obtaining a corresponding compensation value, and the compensated brightness is more approximate to the ideal brightness.
Example 3:
as shown in fig. 3, as a third embodiment of the present application, the display device includes a light intensity sensor for detecting the brightness of ambient light, and the driving method further includes the steps of:
s3: detecting the brightness of external environment light, if the brightness value is larger than a preset brightness value, directly starting an electronic paper pixel, and closing an OLED sub-pixel; if the brightness is less than or equal to the preset brightness value, executing the step S1 and the step S2;
wherein, the electronic paper pixel is formed by using a color electronic paper material.
In this embodiment, the display device further includes a light intensity sensor, where the light intensity sensor is connected to the electronic paper pixel, and the light intensity sensor detects brightness of ambient light, generates a corresponding driving voltage according to the brightness of the ambient light, and outputs the driving voltage to the electronic paper pixel, so that the electronic paper pixel in the pixel area emits light, and when the brightness value of the ambient light is greater than a preset brightness value, the electronic paper pixel is directly turned on, and the OLED sub-pixel is turned off; if the brightness is smaller than or equal to a preset brightness value, judging and comparing the gray-scale data of the three OLED sub-pixels, if the gray-scale data of any two OLED sub-pixels are the same, generating corresponding gray-scale data to the electronic paper pixels to drive the electronic paper pixels to display, if the gray-scale data of any one OLED sub-pixel is different from the gray-scale data of the other two OLED sub-pixels, driving the three OLED sub-pixels to display, and when the brightness of the three OLED sub-pixels is insufficient, simultaneously starting the electronic paper pixels to compensate the brightness of the OLED sub-pixels.
Example 4:
referring to fig. 4, as a fourth embodiment of the present application, the foregoing first embodiment is further refined, but this embodiment is not in conflict with other embodiments, and may also be an extension or extension of other embodiments, and specifically, the display device includes a first area and a second area, where the first area is disposed around the second area, and the second area is a two-dimensional code area, that is, the second area is equivalent to a specific area, where the specific area may be a fixed area or a variable area that is initially disposed, and the variable area may be analyzed and divided according to data fed back by different two-dimensional code pages, for example, in some pages, the two-dimensional code area is in the middle, and in some pages, the two-dimensional code is located in an upper middle, and the second area is obtained by analyzing data of different pages, where the driving method includes the steps of:
s4: judging whether the current pixel belongs to a second area, and if so, simultaneously starting an OLED sub-pixel and an electronic paper pixel; if the first region is included, steps S1 and S2 are performed.
In this embodiment, mainly considering some application scenarios of the panel on the mobile phone, in daily life applications of the mobile phone, the two-dimensional code is most frequently used, for example, when a bus subway is sitting, or when a user goes into or goes out of a visiting scenic spot or a business super shopping payment, the mobile phone needs to be opened to use the two-dimensional code for payment or verification, and when the two-dimensional code area is verified, higher brightness is required, if the brightness is insufficient, the corresponding equipment cannot be identified, and the use experience of the user is affected; in addition, because the two-dimensional code area mainly shows black and white, the corresponding OLED sub-pixels may be turned off, so that only the electronic paper pixels are turned on, obviously, the electronic paper pixels are simply turned on, and the brightness of the electronic paper pixels is possibly lower when the electronic paper pixels are influenced by ambient light and influence the two-dimensional code identification, so that whether the current pixels belong to the second area is judged, if the current pixels belong to the second area, the OLED sub-pixels and the electronic paper pixels are turned on at the same time, so that the brightness of the second area is improved, and if the current pixels are not in the second area, other areas can still determine whether to drive the electronic paper pixels to display or drive the three OLED sub-pixels to display according to the comparison result of the gray scale data of the three OLED sub-pixels.
Example 5:
as shown in fig. 5 and 6, as a fifth embodiment of the present application, which is an embodiment of the apparatus of the embodiment of the driving method described above, the display apparatus 100 in this embodiment may be driven using the driving method described in any of the embodiments described above, the display apparatus 100 includes a plurality of pixel regions 110, each pixel region 110 includes three OLED sub-pixels 120 and one electronic paper pixel 130, each OLED sub-pixel 120 is provided with an independent anode 121, and a common cathode 122, and an organic light emitting layer 123 is provided between the cathode 122 and the anode 121; the electronic paper pixel 130 includes a first electrode 131, a second electrode 133, and an electronic capsule 132, the display device 100 includes a data driving module 160 and a gray-scale data obtaining and judging output module 170, the gray-scale data obtaining and judging output module 170 controls the driving display of the OLED sub-pixel 120 and the electronic paper pixel 130 according to the gray-scale data output by the data driving module 160, and by adding the electronic paper pixel 130 in the OLED panel, the electronic paper pixel 130 and the OLED sub-pixel 120 can be alternately displayed in different states, thereby reducing the attenuation of the OLED sub-pixel 120 and simultaneously reducing the power consumption of the OLED panel.
The colors of the three OLED sub-pixels 120 are different, in general, the three OLED sub-pixels 120 are respectively a red sub-pixel R, a green sub-pixel G and a blue sub-pixel B, the area of the blue sub-pixel is larger than that of the red sub-pixel or the green sub-pixel, the three OLED sub-pixels 120 are arranged in a triangle, the electronic paper pixels 130 are arranged in a column, the sub-pixels RGB are arranged in a triangle, the electronic paper pixels 130E are arranged in a column, and the electronic paper sub-pixels between the two pixels can reach a common electronic paper capsule, so that the electronic paper is easier to attach, and the process difficulty is reduced.
Further, the electronic pixels are arranged between any two adjacent OLED sub-pixels 120 along the scanning line direction, the first electrodes 131 of any two adjacent electronic paper pixels 130 are spaced apart from each other along the data line direction, and the second electrodes 133 are communicated with each other; wherein the second electrode 133 is a common electrode; the electronic paper sub-pixels E of the two pixels share a common electrode, and the electronic capsules 132 share the common electrode, but the two first electrodes 131 below are not shared, and are independently arranged, so that the display of the pixels is facilitated; in addition, the OLED subpixel 120 also employs a common electrode as the cathode 122; the OLED sub-pixel 120 is provided with an encapsulation layer 140, the encapsulation layer 140 is hollowed out corresponding to the electronic paper pixel 130 area 110, and the hollowed-out area and the encapsulation layer 140 are filled with a flat layer 150.
Judging whether the R/G/B data are the same, if so, opening the sub-pixels of the electronic paper to display the same gray scale, wherein the R/G/B sub-pixels do not need to emit light, so that the R/G/B light emitting duration during screen display is reduced, and the service life of the electronic paper is prolonged; if the 3 data are different, the R/G/B normally emits light; the gray scale values are the same, white light is obtained after light mixing, the gray scale values are changed, the color is white, and the brightness is changed; in addition, in the strong light, in order to improve the display brightness, the luminous intensity of R/G/B is improved, and the design of the invention can improve the brightness of the panel by opening the sub-pixels of the electronic paper in the strong light, and the R/G/B keeps the original brightness unchanged, thereby prolonging the service life of the panel.
Example 6:
as shown in fig. 7, as a further refinement of the sixth embodiment of the present application, the display device 100 includes a brightness detection module 180 and a brightness compensation module 190, where the brightness detection module 180 is connected to the data driving module 160 and the brightness compensation module 190, the brightness compensation module 190 is connected to the gray-scale data obtaining and judging output module 170, the brightness detection module 180 detects the actual display brightness, outputs a control signal to the brightness compensation module 190 according to a comparison result between the actual display brightness and the display brightness of the corresponding gray-scale, and controls the gray-scale data obtaining and judging output module 170 to output a driving voltage to the corresponding OLED sub-pixel 120 or the electronic paper pixel 130 according to a compensation value.
The gray-scale data acquisition and judgment output module 170 acquires the gray-scale data output by the data driving module 160, the brightness detection module 180 acquires the brightness of the external environment, meanwhile acquires the gray-scale data output by the data driving module 160 and calculates the corresponding brightness, the compensation value is obtained according to the brightness value and fed back to the gray-scale data acquisition and judgment output module 170, the gray-scale data acquisition and judgment output module 170 generates new gray-scale data according to the compensation value and the gray-scale data comparison result and outputs the new gray-scale data to the corresponding electronic paper pixel 130, so that the brightness compensation of the electronic paper pixel 130 on the OLED sub-pixel 120 is realized, the brightness improvement is realized without increasing the driving voltage of the OLED, the power consumption is reduced, the attenuation of the OLED sub-pixel 120 is reduced, and the service life of the OLED panel is prolonged.
Further, considering that the OLED panel is affected by the resistance R of the power supply line, after the last row is turned on, the supply of the levvdd will be shunted to the OLED of the last row, and the current is I1, then the supply of the next row will not be levvdd, but levvdd-I1×r, and similarly, each row will be so, which will cause the supply voltage to become gradually smaller, resulting in uneven brightness display; in order to reduce the influence of the line resistance, the influence of the line resistance is added when the compensation value is calculated; specifically, the display device 100 includes a current detection module 200, the current detection module 200 detects a current value of each row of OLED subpixels 120, and calculates a difference value of current values of two adjacent rows, and the brightness compensation module 190 generates a brightness compensation value of a next row of pixels according to a comparison result of actual display brightness and display brightness corresponding to gray scale and the difference value of current values of two adjacent rows, so as to drive the electronic paper pixels 130, and improve accuracy of the compensation value.
Example 7:
as shown in fig. 8, as a seventh embodiment of the present application, the display device 100 includes a light intensity sensor for detecting the brightness of the ambient light, and if the brightness value of the ambient light detected by the light intensity sensor is greater than the preset brightness value, the electronic paper pixel 130 is directly turned on, and the OLED sub-pixel 120 is turned off; if the brightness is less than or equal to the preset brightness value, the gray-scale data acquiring and judging output module 170 acquires the gray-scale data of the three OLED sub-pixels 120, judges and compares the gray-scale data of the three OLED sub-pixels 120, generates corresponding gray-scale data to the electronic paper pixels 130 if the gray-scale data of any two OLED sub-pixels 120 are the same, so as to drive the electronic paper pixels 130 to display, and drives the three OLED sub-pixels 120 to display if the gray-scale data of any one OLED sub-pixel 120 is different from the gray-scale data of the other two OLED sub-pixels 120.
The electronic paper pixel 130 is formed by using a color electronic paper material, and when the OLED sub-pixel 120 is turned off, color display can be realized only when the electronic paper pixel 130 is turned on, and in addition, because the brightness is enough when the ambient light is strong, the electronic paper pixel 130 capable of displaying color is independently used, not only color display can be realized, but also power consumption can be reduced, and importantly, the OLED sub-pixel 120 can stop working, thereby reducing attenuation of the OLED sub-pixel 120.
Example 8:
as shown in fig. 9, as an eighth embodiment of the present application, unlike the above-mentioned embodiments, the present embodiment mainly considers that, because a part of the area needs to be kept highlighted, if the electronic paper pixel 130 is directly turned off under the condition that the gray-scale data of the OLED sub-pixel 120 is the same, there may be an insufficient brightness, so in some areas, even if the gray-scale data of the OLED sub-pixel 120 is the same, the electronic paper pixel 130 is still kept on, and specifically, referring to fig. 5 and 9, the display device 100 includes a first area 101 and a second area 102, where the first area 101 is disposed around the second area 102, the second area 102 is a two-dimensional code area, and it is determined whether the current pixel belongs to the second area 102, and if it belongs to the second area 102, the OLED sub-pixel 120 and the electronic paper pixel 130 are simultaneously turned on; if the pixel data belongs to the first area 101, the gray-scale data acquiring and judging output module 170 acquires the gray-scale data of the three OLED sub-pixels 120, judges and compares the gray-scale data of the three OLED sub-pixels 120, generates corresponding gray-scale data to the electronic paper pixels 130 if the gray-scale data of any two OLED sub-pixels 120 are the same, so as to drive the electronic paper pixels 130 to display, and drives the three OLED sub-pixels 120 to display if the gray-scale data of any one OLED sub-pixel 120 is different from the gray-scale data of other two OLED sub-pixels 120, so that the electronic paper pixels 130 and the R/G/B sub-pixels alternately display in different states.
It should be noted that, the limitation of each step in the present solution is not to be considered as limiting the sequence of steps on the premise of not affecting the implementation of the specific solution, that is, the steps written in the previous step may be executed before, may be executed after, or may even be executed simultaneously, and as long as the implementation of the present solution is possible, all the steps should be considered as falling within the protection scope of the present application. The inventive concept of the present application may form a very large number of embodiments, but the application documents are limited in size and cannot be listed one by one, so that on the premise of no conflict, the above-described embodiments or technical features can be arbitrarily combined to form new embodiments, and after the embodiments or technical features are combined, the original technical effects will be enhanced.
The foregoing is a further detailed description of the present application in connection with specific alternative embodiments, and it is not intended that the practice of the present application be limited to such descriptions. It should be understood that those skilled in the art to which the present application pertains may make several simple deductions or substitutions without departing from the spirit of the present application, and all such deductions or substitutions should be considered to be within the scope of the present application.
Claims (10)
1. A driving method of a display device including a plurality of pixel regions each including three OLED sub-pixels and one electronic paper pixel, the driving method comprising the steps of:
acquiring gray-scale data of three OLED sub-pixels; and
judging and comparing the gray-scale data of the three OLED sub-pixels, if the gray-scale data of the three OLED sub-pixels are the same, generating corresponding gray-scale data to the electronic paper pixels to drive the electronic paper pixels to display, and if the gray-scale data of any one OLED sub-pixel is different from the gray-scale data of the other two OLED sub-pixels, generating corresponding gray-scale data to the three OLED sub-pixels to drive the three OLED sub-pixels to display;
wherein the three OLED sub-pixels are different in color.
2. The driving method according to claim 1, wherein the display device includes a brightness detection module and a brightness compensation module, the brightness detection module is connected to the brightness compensation module, the brightness compensation module controls the brightness of the electronic paper pixel, the judging compares the gray-scale data of the three OLED sub-pixels, if the gray-scale data of the three OLED sub-pixels are the same, the corresponding gray-scale data is generated to the electronic paper pixel to drive the electronic paper pixel to display, if the gray-scale data of any one OLED sub-pixel is different from the gray-scale data of the other two OLED sub-pixels, the corresponding gray-scale data is generated to the three OLED sub-pixels, and the driving the three OLED sub-pixels to display includes:
the brightness detection module detects and acquires actual display brightness L1 after light mixing of three OLED sub-pixels, compares the actual display brightness with display brightness L2 after light mixing of gray scales corresponding to the three OLED sub-pixels, and drives the three OLED sub-pixels to display if L1 is smaller than or equal to L2 and gray scale data of any one OLED sub-pixel is different from gray scale data of other two OLED sub-pixels; and
and the brightness compensation module obtains a compensation value according to the difference value of the L1 and the L2, and controls the luminous brightness of the electronic paper pixel through the compensation value.
3. The driving method according to claim 1, wherein the display device includes a light intensity sensor for detecting a brightness of the ambient light, the driving method further comprising the steps of:
detecting the brightness of external environment light, if the brightness value is larger than a preset brightness value, directly starting an electronic paper pixel, and closing an OLED sub-pixel; if the brightness is smaller than or equal to a preset brightness value, gray-scale data of three OLED sub-pixels are obtained, the gray-scale data of the three OLED sub-pixels are judged and compared, if the gray-scale data of the three OLED sub-pixels are the same, corresponding gray-scale data are generated to the electronic paper pixels so as to drive the electronic paper pixels to display, and if the gray-scale data of any one OLED sub-pixel are different from the gray-scale data of the other two OLED sub-pixels, corresponding gray-scale data are generated to the three OLED sub-pixels so as to drive the three OLED sub-pixels to display;
wherein, the electronic paper pixel is formed by using a color electronic paper material.
4. The driving method of claim 2, wherein the display device is divided into a plurality of partitions along the data line direction of the OLED subpixels, each partition including at least one row of pixels, the luminance compensation module obtains a compensation value according to a difference between L1 and L2, and the step of controlling the light emission luminance of the electronic paper pixels by the compensation value comprises:
and obtaining a compensation value according to the difference value of L1 and L2 and the difference value of the current of the pixel in the upper row and the current of the pixel in the lower row, and controlling the luminous brightness of the pixel of the electronic paper through the compensation value.
5. The driving method according to claim 1, wherein the display device includes a first region and a second region, the first region being disposed around the second region, the second region being a two-dimensional code region, the driving method comprising the steps of:
judging whether the current pixel belongs to a second area, and if so, simultaneously starting an OLED sub-pixel and an electronic paper pixel; and if the gray-scale data of any one OLED sub-pixel is different from the gray-scale data of other two OLED sub-pixels, generating corresponding gray-scale data to the three OLED sub-pixels to drive the three OLED sub-pixels to display.
6. A display device driven by the driving method according to any one of claims 1 to 5, wherein the display device comprises a plurality of pixel areas, each pixel area comprises three OLED sub-pixels and one electronic paper pixel, each OLED sub-pixel is provided with an independent anode, each electronic paper pixel comprises a first electrode, a second electrode and an electronic capsule, the display device comprises a data driving module and a gray-scale data acquisition and judgment output module, and the gray-scale data acquisition and judgment output module controls driving display of the OLED sub-pixels and the electronic paper pixels according to gray-scale data output by the data driving module.
7. The display device according to claim 6, wherein the display device comprises a brightness detection module and a brightness compensation module, the brightness detection module is respectively connected with the data driving module and the brightness compensation module, the brightness compensation module is connected with the gray-scale data acquisition and judgment output module, the brightness detection module detects the actual display brightness, and outputs a control signal to the brightness compensation module according to the comparison result of the actual display brightness and the display brightness of the corresponding gray scale, and the gray-scale data acquisition and judgment output module is controlled by the compensation value to output a driving voltage to the corresponding OLED sub-pixel or electronic paper pixel.
8. The display device of claim 6, wherein the three OLED subpixels are respectively a red subpixel, a green subpixel, and a blue subpixel, the blue subpixel has an area larger than the red subpixel or the green subpixel, the three OLED subpixels are arranged in a triangle, and the electronic paper pixels are arranged in a column.
9. The display device according to claim 7, wherein the display device comprises a current detection module, the current detection module detects a current value of each row of OLED subpixels and calculates a difference value of current values of two adjacent rows, and the brightness compensation module generates a brightness compensation value of a next row of pixels according to a comparison result of actual display brightness and display brightness corresponding to gray scale and the difference value of the current values of the two adjacent rows, and drives the electronic paper pixels.
10. The display device according to claim 8, wherein the electronic pixels are arranged between any adjacent two of the OLED subpixels in the scanning line direction, first electrodes of the any adjacent two of the electronic paper pixels are spaced apart from each other in the data line direction, and the second electrodes are communicated with each other;
wherein the second electrode is a common electrode.
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