CN111899692B - OLED display device, compensation data power-on transmission method and image display method - Google Patents
OLED display device, compensation data power-on transmission method and image display method 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]
- 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
- G09G3/3233—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 with pixel circuitry controlling the current through the light-emitting element
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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
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
Abstract
The application provides an OLED display device, a compensation data power-on transmission method and an image display method. The display compensation value random access memory and the display compensation logic unit are arranged at the electronic client, so that the area of a driving chip is not occupied, the area of the driving chip is not required to be increased, and the problem of distortion is avoided; moreover, the original data does not need to be erased to switch different frame frequencies, no screen blacking time exists, the image display effect is better, and the user experience is good; the compensation data corresponding to different frame frequencies are directly called, so that the compensation accuracy can be ensured, and the compensation effect is better.
Description
Technical Field
The invention relates to the technical field of display, in particular to an OLED display device, a compensation data power-on transmission method and an image display method.
Background
Currently, an Active Matrix Driving organic light emitting diode (AMOLED) is widely used due to its excellent characteristics of self-luminescence, high display contrast, thin thickness, wide viewing angle, fast response speed, wide temperature range, simple structure and process. However, the current of the organic light emitting diode varies with the threshold voltage shift of the driving transistor, so that the AMOLED display panel generates a Mura (color spot defect) phenomenon with non-uniform display brightness. The Mura phenomenon is that the actual luminance of some pixels is darker or brighter than the theoretical luminance to be displayed, and further affects the luminance uniformity and the luminance constancy of the AMOED display panel.
Before the OLED display panel leaves a factory, display unevenness (demura) needs to be eliminated, demura data (hereinafter, referred to as compensation data) is usually stored in a Flash Memory (Flash), and when the OLED display panel is powered on, the compensation data is transmitted to a display compensation value Random Access Memory (De-Mura RAM), and an image is displayed after an image to be displayed is compensated through operation processing of a display compensation value Logic unit (De-Mura Logic Elements).
However, if the OLED display panel is manufactured to form an electronic client after leaving the factory, the image compensation effect is not good in the actual use process.
Disclosure of Invention
In view of the above, the present invention provides an OLED display device, a compensation data power-on transmission method, and an image display method, so as to solve the problem that the charging mode limited by charging facilities such as a charging pile or a charging socket in the prior art cannot meet the requirements of people.
In order to achieve the purpose, the invention provides the following technical scheme:
in a first aspect, the present invention provides an OLED display device comprising:
the electronic client and the driving chip are electrically connected;
the electronic client comprises a flash memory, a first display compensation value random access memory and a first display compensation value logic unit;
the driving chip comprises a display image data random access memory;
wherein the first display compensation value random access memory is in communication with the flash memory through the display image data random access memory.
In a second aspect, the present invention provides a compensation data power-on transmission method, which is applied to the above OLED display device, and the compensation data power-on transmission method includes:
when the electronic client is powered on and is not displayed, the compensation data stored in the flash memory is uploaded to the random memory for displaying the image data;
uploading the compensation data in the display image data random access memory to a first display compensation value random access memory;
and the OLED display device displays, and the transmission of the power-on data is finished.
In a third aspect, the present invention further provides an image display method of an OLED display device, which is applied to an OLED display device that is only provided with a flash memory, a first display compensation value random access memory, and a first display compensation value logic unit at an electronic client, and is based on a compensation data power-on transmission method corresponding to the OLED display device, where the image display method of the OLED display device includes:
when the OLED display device starts to display, acquiring first initial image data and the frame frequency of the first initial image data;
according to the frame frequency of the first initial image data, adopting compensation data corresponding to the frame frequency to perform image compensation, and outputting first compensated image data to a display image data random access memory;
and the first compensated image data is transmitted to a display panel of the electronic client through a gamma circuit, and the display panel displays images according to the first compensated image data.
In a fourth aspect, the present invention further provides an image display method for an OLED display device, which is applied to an OLED display device in which a flash memory, a first display compensation value random access memory, and a first display compensation value logic unit are disposed at an electronic client, and a second display compensation value random access memory and a second display compensation value logic circuit are disposed in a driver chip, and based on a compensation data power-on transmission method corresponding to the device, the image display method for the OLED display device includes:
when the OLED display device starts to display, acquiring second initial image data and the frame frequency of the second initial image data;
judging whether the frame frequency of the second initial image data is a first frame frequency, wherein the first frame frequency is a frame frequency corresponding to compensation data stored in a second display compensation value random access memory;
if so, calling compensation data stored in a second display compensation value random access memory to compensate the second initial image data, and outputting second compensated image data to a gamma circuit;
the second compensated image data is transmitted to a display panel of the electronic client through a gamma circuit, and the display panel displays images according to the second compensated image data;
if not, according to the frame frequency of the second initial image data, calling compensation data stored in a first display compensation value random access memory to compensate the second initial image data, and outputting third compensated image data to a display image data random access memory;
and the third compensated image data is transmitted to a display panel of the electronic client through a gamma circuit, and the display panel displays images according to the third compensated image data.
According to the technical scheme, the OLED display device provided by the invention has the advantages that the display compensation value random access memory and the display compensation logic unit in the driving chip are arranged at the electronic client, the structures are communicated with each other through the electrical connection, in the using process of the electronic client, the compensation data in the flash memory can be called through the display image data random access memory in the driving chip in the power-on non-display stage, then the compensation data is stored in the display compensation value random access memory of the electronic client, and the image is compensated through the display compensation logic unit of the electronic client. Even if the data volume is large, the display compensation value random access memory and the display compensation logic unit are arranged at the electronic client, so that the area of a driving chip is not occupied, the area of the driving chip is not required to be increased, the compensation data is not required to be compressed, and the problem of distortion is avoided; moreover, the data of which frame frequency is required can be directly called, the switching of different frame frequencies is not required to be carried out by erasing the original data, the switching can be directly carried out by the addresses of the data of different frame frequencies, the black screen time is avoided, the image display effect is better, and the user experience is good; and the compensation data corresponding to different frame frequencies are directly called, so that the compensation accuracy can be ensured, and the compensation effect is better.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of a compensation structure of an OLED display device in the prior art;
FIG. 2 is a data flow diagram of an OLED display device in the prior art;
fig. 3 is a schematic structural diagram of an OLED display device according to an embodiment of the present invention;
fig. 4 illustrates a data flow direction of a compensation data burning process of an OELD display device according to an embodiment of the present invention;
fig. 5 is a data flow diagram when the electronic client is powered on and is not displayed according to an embodiment of the present invention;
fig. 6 is a flowchart of an image display method of an OLED display device according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of another OLED display device according to an embodiment of the present invention;
fig. 8 is a schematic flowchart of an image display method of an OLED display device according to an embodiment of the present invention;
fig. 9 is a schematic flow chart of an image display method of another OLED display device according to an embodiment of the present invention.
Detailed Description
As described in the background section, in the prior art, after the OLED display panel is manufactured to form the electronic client, the image compensation effect is not good in the actual use process.
The inventors found that the problems of the above phenomena are:
fig. 1 is a schematic diagram illustrating a compensation structure of an OLED display device in the prior art; the system comprises a Flash011 positioned on a main FPC (flexible circuit board) 01 of an electronic client P and used for storing compensation data; a Display compensation random access memory (De-Mura RAM)021, a corresponding Display compensation Logic unit (De-Mura Logic Elements)022, and a Display image data random access memory (Display RAM)023 and Other Logic units (Other Logic Elements)024, which are located in a Display Driver IC 02 outside the electronic client P. As shown in fig. 2, which is a data flow diagram of an OLED Display device in the prior art, compensation data is stored in Flash011, and when power is turned on, the compensation data is retrieved from Flash011 by Display RAM 023, then internally transmitted through RAM, and transferred to De-Mura RAM 021.
With the generation of multi-frame frequency display panels, data compensation needs to be performed on multiple frame frequencies of the display panels. The image compensation process of the compensation data in the prior art is described by taking an example that the display panel can display two frame frequencies (for example, 60Hz and 90 Hz):
the first method is to store two sets of Demura compensation data into Flash, and when the display panel is lighted, the two sets of Demura compensation data can be simultaneously transmitted into a random access memory De-Mura RAM in the display driving chip, and different compensation data can be called when different frame frequencies are displayed.
The second method is that two groups of compensation data are stored in Flash, when a 60Hz frame frequency image is displayed, a Driver IC calls the compensation data corresponding to the 60Hz frame frequency from the Flash to transmit to a Display RAM, then the compensation data is transmitted to a De-Mura RAM through the internal transmission of the RAM, and the image to be displayed is compensated through the operation processing of a Display compensation value logic unit; and when the 90Hz frame frequency image is displayed, the Driver IC erases the 60Hz frame frequency compensation data in the De-Mura RAM, then obtains the 90Hz compensation data from the Flash, and transmits the 90Hz compensation data to the RAM for compensating the 90Hz frame frequency image.
The third is an improved way proposed for the second way, in which different frame rates share a set of compensation data, and a scaling factor is increased to adjust the compensation data between different frame rates.
However, when the display panel is powered on each time, the first mode needs to store the compensation data corresponding to the number of sets, because the multiple sets of compensation data are uploaded to the RAM of the driving chip at the same time, the space occupied by the multiple sets of compensation data is multiplied, the area of the De-mura RAM on the driving chip needs to be correspondingly increased, the area of the driving chip needs to be increased, the cost and the size of the driving chip are higher, the binding area of the display device is larger, the cost of the whole display panel is higher, in order to reduce the cost and the size of the driving chip, the occupied area of the De-mura RAM is smaller by increasing the compression factor of the compensation data, but the compression factor is increased, image distortion occurs, and the compensation effect is deteriorated due to the distortion.
In the second mode, in the process of switching from the 60Hz frame frequency to the 90Hz frame frequency, the compensation data of the 60Hz frame frequency needs to be firstly erased from the De-mura RAM, and then the compensation data of the 90Hz frame frequency needs to be called from the Flash to the De-mura RAM.
In the third mode, since the compensation data is not compensated according to the real-time image, but a group of compensation data is shared, for example, 90Hz compensation data is generated by 60Hz compensation data, the scaling factor corresponding to each frame frequency is compensated based on the whole panel, so that the compensation data is not directly obtained based on the display of each pixel of the image, thereby causing a phenomenon of poor compensation effect.
Based on this, the present invention provides an OLED display device, comprising:
the electronic client and the driving chip are electrically connected;
the electronic client comprises a flash memory, a first display compensation value random access memory and a first display compensation value logic unit;
the driving chip comprises a display image data random access memory;
wherein the first display compensation value random access memory is in communication with the flash memory through the display image data random access memory.
In the invention, the display compensation value random access memory and the display compensation logic unit in the driving chip are arranged at the electronic client, and the structures are communicated with each other through electrical connection, so that no matter how many groups of compensation data with different frame frequencies are stored in the flash memory, when the electronic client is powered on in the using process, the data in the flash memory can be called through the display image data random access memory in the driving chip, and then the logic operation is carried out at the electronic client, and finally the data compensation is realized; moreover, the data of which frame frequency is required can be directly called, the switching of different frame frequencies is not required to be carried out by erasing the original data, the switching can be directly carried out by the addresses of the data of different frame frequencies, the black screen time is avoided, the image display effect is better, and the user experience is good; and the compensation data corresponding to different frame frequencies are directly called, so that the compensation accuracy can be ensured, and the compensation effect is better.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 3 shows a schematic structural diagram of an OLED display device according to an embodiment of the present invention, where fig. 3 is a schematic structural diagram of an OLED display device according to an embodiment of the present invention; the OLED display device includes: an electronic client P and a Driver IC (Driver IC)1 electrically connected; the electronic client P comprises a Flash memory (Flash)11, a first display compensation value random access memory (De-mura RAM)12 and a first display compensation value Logic unit (De-mura Logic Elements) 13; a driver chip 2, the driver chip 2 including a Display image data random access memory (Display RAM) 21; wherein the first display compensation value random access memory 12 communicates with the flash memory 11 through the display image data random access memory 21.
In addition, the driving chip of the OLED display device further includes other logic unit circuits 22, and circuits for assisting display, such as a gamma circuit (not shown in the figure).
It should be noted that the electronic client described in the present invention includes a display panel and a main FPC connected to the display panel, and does not include a driver chip. The OLED display device may be a mobile phone, a computer, a television, an intelligent wearable display device, and the like, which is not limited in the present invention. The driving chip Driver IC is used for driving the OLED display panel to display images when the electronic client is started.
In the embodiment of the invention, the display compensation value random access memory De-mura RAM and the corresponding display compensation value Logic unit De-mura Logic Elements are used, so that the image can be directly compensated by calling various frame frequency compensation data without being limited by the area of a driving chip in the image compensation process.
It should be noted that, based on the OLED Display device, the data flow diagram of the compensation data burning process of the OELD Display device provided in the present invention is shown in fig. 4, and is not changed, or the data flow diagram is transmitted to the Display RAM21 through MIPI (Mobile Industry Processor Interface) communication by using a computer PC, and then is written into the Flash11 through SPI (Serial Peripheral Interface) communication.
In the embodiment of the invention, the Display compensation value random access memory De-Mura RAM is transferred from the Driver IC of the driving chip to the electronic client P, so that the data flow diagram of the electronic client without displaying images in the embodiment is shown in FIG. 5, when the electronic client is powered on but not displayed, the compensation data stored in the Flash memory Flash11 is uploaded to the Display RAM21 through SPI communication; then, the compensation data in the Display image data random access memory Display RAM21 is uploaded to the first Display compensation value random access memory De-Mura RAM12 by the transmission function of the Display image data random access memory Display RAM 21; and when the OLED display device displays, the power-on data transmission is finished.
In this embodiment, MIPI communication is used when uploading image data from the Display RAM to the first Display compensation value RAM, and C-Phy bidirectional communication is used.
Compared with data transmission between the RAM inside the driver chip in the prior art, MIPI communication is communication between the driver chip and the electronic client, but the MIPI communication is shorter in transmission time and faster in speed compared with SPI communication, so that actually, more data transmission time is not prolonged, namely the power-on time is not prolonged a lot, and the black screen time is within an allowable range.
In the invention, the display compensation value random access memory De-Mura RAM is moved out of the driving chip to the electronic client, so that the display compensation value random access memory De-Mura RAM is not influenced by the area of the driving chip, and therefore, the display compensation value random access memory De-Mura RAM can store compensation data corresponding to a plurality of frame frequencies, that is, the compensation data in the embodiment comprises a plurality of groups of compensation data corresponding to a plurality of frame frequencies. For example, the compensation data comprises a group of 30Hz frame frequency; a group of compensation data corresponding to 60Hz frame frequency; a group of compensation data corresponding to 90Hz frame frequency; a group of compensation data corresponding to 120Hz frame frequency; as the OLED develops, a set of compensation data corresponding to a frame frequency of 240Hz may be included, which is not limited in this embodiment. In this embodiment, the compensation data corresponding to the currently commonly used OLED image display frame frequency may be selected from the multiple sets of compensation data, that is, the multiple sets of compensation data at least include: corresponding first compensation data when the image display frame frequency is 60 Hz; second compensation data corresponding to the image display frame frequency of 90 Hz; and third compensation data corresponding to the image display frame frequency of 120 Hz.
In addition, it should be noted that the group of compensation data described in this embodiment may be compensation data that is not compressed, and only the storage size of the original data amount is directly reserved, so that when the compensation data is called, the compensation data can be directly adopted to compensate the image, and a phenomenon that the image compensation effect is poor due to a high compression magnification of the compensation data is avoided.
Based on the OLED display device and the data flow diagram, an embodiment of the present invention further provides an image display method of the OLED display device, as shown in fig. 6, where fig. 6 is a flowchart of the image display method of the OLED display device provided in the embodiment of the present invention, and the image display method includes:
s101: when the OLED display device starts to display, acquiring first initial image data and the frame frequency of the first initial image data;
in the embodiment of the invention, when the OLED display device starts to display, actually, only the display action of the driving chip on the OLED display panel is triggered correspondingly at this time, but an image is not really displayed. The first initial image data is uncompensated image data, that is, image data generated by the electronic client first, the frame frequency of the image data is determined while the image data is generated, and the image data and the frame frequency are input to the first display compensation value logic unit for processing, that is, the process proceeds to S102.
S102: according to the frame frequency of the first initial image data, adopting compensation data corresponding to the frame frequency to perform image compensation, and outputting first compensated image data to a display image data random access memory;
and the first display compensation value logic unit calls compensation data of the corresponding frame frequency in the first display compensation value random access memory according to the acquired frame frequency, namely, the compensation of the image is realized. The input of the first display compensation value logic unit is image data generated by the electronic client, the image data is transmitted to the first display compensation value logic unit through the display image random access memory, the first display compensation value logic unit also receives compensation data of a corresponding frame frequency from the first display compensation value random access memory, the compensated image data is output after the compensation data and the image data are processed, and the compensation data of the corresponding frame frequency is called in real time to perform image compensation in the process of processing the image data.
S103: and the first compensated image data is transmitted to a display panel of the electronic client through a gamma circuit, and the display panel displays images according to the first compensated image data.
The first compensated image data enters the random memory of the display image data of the driving chip, then the gamma circuit of the driving chip is used for carrying out digital-to-analog conversion and other processing, the compensated image data is converted into a voltage signal and transmitted to the display panel of the display device, and the display panel carries out compensated image display according to the voltage signal transmitted by the driving chip.
As can be seen from the comparison between the compensation data power-on transmission method and the image display method, in the embodiment of the present invention, in the power-on non-display transmission of the compensation data, the data flow direction is: and the Flash is uploaded to a Display RAM of the drive chip through SPI communication, and then is uploaded to a De-Mura RAM of the electronic client through MIPI reverse communication. In the image display method, the data flow is as follows: the electronic client transmits the compensated image data to a Display RAM of the driving chip through MIPI forward communication, then converts the image data into a voltage signal through a gamma circuit, and finally transmits the voltage signal to a Display panel for image Display.
In the embodiment of the invention, the De-Mura RAM and the De-Mura Logic Elements are placed at the electronic client through forward and reverse transmission of MIPI at different time intervals, namely time-sharing multiplexing of MIPI communication, so that compensation data are uploaded to the electronic client for use when being electrified, the De-Mura functions corresponding to different frame frequencies are adjusted according to the real-time working state of a display panel of the electronic client, the De-Mura function is prevented from being performed by increasing the area of a driving chip or adopting different coefficient reduction modes, and the purposes of reducing the cost and improving the compensation effect are achieved.
Based on the same inventive concept, an OLED display device is further provided in an embodiment of the present invention, please refer to fig. 7, fig. 7 is a schematic structural diagram of another OLED display device provided in an embodiment of the present invention, and the OLED display device, in addition to the structure shown in fig. 3, further includes a second display compensation value random access memory 12 'and a second display compensation value logic circuit 13'.
It should be noted that the second display offset random access memory 12' in this embodiment is used to store at least one set of normal uncompressed offset data, so as to prevent the offset data from being compressed, which results in poor offset effect. In order to minimize the occupied area of the second display compensation value random access memory 12 ' and the second display compensation value logic circuit 13 ' in the driving chip, in this embodiment, optionally, the second display compensation value random access memory 12 ' is used for storing a set of normal uncompressed compensation data.
When the driving chip also comprises a second display compensation value random access memory and a second display compensation value logic circuit; the compensation data power-on transmission method in the previous embodiment further includes uploading one set of compensation data to the second display compensation value random access memory. The specific compensation data power-on transmission method comprises the following steps: uploading one group of compensation data in a plurality of groups of compensation data in the display image data random access memory to a second display compensation value random access memory; and uploading the compensation data corresponding to the rest frame frequency to a first display compensation value random access memory.
Because the amounts of the compensation data corresponding to different frame frequencies are different, and when the frame frequency is larger, the amount of the compensation data is exponentially increased by times, and the power consumption of the driving chip is correspondingly increased, in this embodiment, it is optional that one group of compensation data uploaded to the second display compensation value random access memory is the compensation data corresponding to the lowest frame frequency in the plurality of groups of compensation data, so as to reduce the power consumption of the driving chip.
The compensation data in this embodiment includes multiple sets of compensation data corresponding to multiple frame frequencies. For example, the compensation data comprises a group of 30Hz frame frequency; a group of compensation data corresponding to 60Hz frame frequency; a group of compensation data corresponding to 90Hz frame frequency; a group of compensation data corresponding to 120Hz frame frequency; as the OLED develops, a set of compensation data corresponding to a frame frequency of 240Hz may be included, which is not limited in this embodiment. The optional sets of compensation data in this embodiment at least include: corresponding first compensation data when the image display frame frequency is 60 Hz; second compensation data corresponding to the image display frame frequency of 90 Hz; and third compensation data corresponding to the image display frame frequency of 120 Hz. Correspondingly, in order to reduce the power consumption of the driving chip, the corresponding first compensation data when the image display frame frequency is 60Hz is uploaded to the second display compensation value random access memory.
Based on the OLED display device and the compensation data uploading method in this embodiment, as shown in fig. 8, fig. 8 is a schematic flow diagram of an image display method of the OLED display device according to an embodiment of the present invention; the image display method of the OLED display device comprises the following steps:
s201: when the OLED display device starts to display, acquiring second initial image data and the frame frequency of the second initial image data;
s202: judging whether the frame frequency of the second initial image data is a first frame frequency, wherein the first frame frequency is a frame frequency corresponding to compensation data stored in a second display compensation value random access memory;
if yes, the process proceeds to S203: the compensation data stored in a second display compensation value random access memory is called to compensate the second initial image data, and second compensated image data are output to a gamma circuit;
s204: the second compensated image data is transmitted to a display panel of the electronic client through a gamma circuit, and the display panel displays images according to the second compensated image data;
if not, the process proceeds to S205: according to the frame frequency of the second initial image data, calling compensation data stored in a first display compensation value random access memory to compensate the second initial image data, and outputting third compensated image data to a display image data random access memory;
s206: and the third compensated image data is transmitted to a display panel of the electronic client through a gamma circuit, and the display panel displays images according to the third compensated image data.
Optionally, in this embodiment, the compensation data stored in the second display compensation value random access memory includes compensation data corresponding to a 60Hz frame frequency; the image display method in this embodiment will be described in detail by taking an example in which the compensation data stored in the first display compensation value random access memory includes compensation data corresponding to a 90Hz frame frequency and compensation data corresponding to a 120Hz frame frequency.
Referring to fig. 9, fig. 9 is a schematic flow chart of a display method according to an embodiment.
S301: and the frame rate of the second initial image data is determined while the electronic client generates the second initial image data, and the frame rate of the display image of the display panel corresponding to the explicitly displayed second initial image data is determined.
S302: judging whether the frame frequency is 60Hz, if yes, entering S303: the second display compensation value Logic unit De-Mura Logic Elements calls compensation data corresponding to 60Hz frame frequency image data stored in a second display compensation value random access memory De-Mura RAM in the driving chip to compensate the second initial image data;
s304: and outputting the second compensated image data to a gamma circuit, converting the second compensated image data into a voltage signal through the digital-to-analog conversion function of the gamma circuit, and finally outputting the voltage signal to a display panel to drive the display panel to display.
When it is determined that the frame frequency is not the 60Hz frame frequency, S305: whether the image frame frequency is 90Hz frame frequency needs to be further judged, if so, S306: the first Display compensation value Logic unit De-Mura Logic Elements calls compensation data of 90Hz frame frequency in a first Display compensation value random access memory De-Mura RAM in the electronic client, compensates the second initial image data, finally outputs image data corresponding to the 90Hz frame frequency to a Display image data random access memory Display RAM in a driving chip, then transmits the image data to a gamma circuit, converts the image data into a voltage signal through the digital-to-analog conversion function of the gamma circuit, and finally S307: and outputting the data to a display panel, and driving the display panel to display.
If the frame frequency is 120Hz, S308: the first Display compensation value Logic unit De-Mura Logic Elements calls compensation data of 120Hz frame frequency in a first Display compensation value random access memory De-Mura RAM in the electronic client, compensates the second initial image data, finally outputs image data corresponding to the 120Hz frame frequency to a Display image data random access memory Display RAM in a driving chip, then transmits the image data to a gamma circuit, converts the image data into a voltage signal through the digital-to-analog conversion function of the gamma circuit, and finally, S309: and outputting the data to a display panel, and driving the display panel to display.
When the frame frequency of the image display is more in variety, the same can be done, and details thereof are not described in this embodiment.
By the display method, the display of the display compensation value random access memory De-Mura RAM can be simultaneously set by the driving chip and the electronic client, a group of normal uncompressed compensation data is placed on the driving chip, other multi-frame frequency compensation data is placed on the electronic client, under certain conditions, the compensation data in the driving chip can be directly called to directly compensate the image data, under other conditions, the compensation data of the electronic client is used for image compensation, the compensation data and the compensation data are combined, and the compensation can be rapidly realized by the multi-frame frequency images on the basis of reducing the power consumption and the area of the driving chip.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in an article or device that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. An OLED display device, comprising:
the electronic client and the driving chip are electrically connected;
the electronic client comprises a flash memory, a first display compensation value random access memory and a first display compensation value logic unit, wherein the flash memory is used for storing compensation data, and the compensation data comprises multiple groups of compensation data corresponding to multiple frame frequencies;
the driving chip comprises a display image data random access memory, a second display compensation value random access memory and a second display compensation value logic circuit;
the first display compensation value random access memory is in communication with the flash memory through the display image data random access memory, and the display image data random access memory is used for calling multiple groups of compensation data corresponding to multiple frame frequencies stored in the flash memory when the display image data random access memory is powered on and is not displayed, then uploading one group of compensation data in the multiple groups of compensation data to the second display compensation value random access memory, and uploading compensation data corresponding to the rest frame frequencies to the first display compensation value random access memory.
2. A compensation data power-on transmission method, applied to the OLED display device of claim 1, the compensation data power-on transmission method comprising:
when the electronic client is powered on and is not displayed, the compensation data stored in the flash memory is uploaded to a random memory for displaying image data, wherein the compensation data comprises multiple groups of compensation data corresponding to multiple frame frequencies;
uploading one group of compensation data in multiple groups of compensation data corresponding to the multiple frame frequencies in the display image data random access memory to a second display compensation value random access memory, and uploading the compensation data corresponding to the rest frame frequencies to a first display compensation value random access memory;
and the OLED display device displays, and the transmission of the power-on data is finished.
3. The method according to claim 2, wherein the set of compensation data uploaded to the second display compensation value ram is compensation data corresponding to a lowest frame rate of the plurality of sets of compensation data.
4. The method according to claim 2 or 3, wherein the plurality of sets of compensation data at least comprise:
corresponding first compensation data when the image display frame frequency is 60 Hz;
second compensation data corresponding to the image display frame frequency of 90 Hz;
and third compensation data corresponding to the image display frame frequency of 120 Hz.
5. An image display method of an OLED display device, applied to the OLED display device of claim 2, and based on the compensation data power-on transmission method of claim 2 or 3, the image display method of the OLED display device comprising:
when the OLED display device starts to display, acquiring second initial image data and the frame frequency of the second initial image data;
judging whether the frame frequency of the second initial image data is a first frame frequency, wherein the first frame frequency is a frame frequency corresponding to compensation data stored in a second display compensation value random access memory;
if so, calling compensation data stored in a second display compensation value random access memory to compensate the second initial image data, and outputting second compensated image data to a gamma circuit;
the second compensated image data is transmitted to a display panel of the electronic client through a gamma circuit, and the display panel displays images according to the second compensated image data;
if not, according to the frame frequency of the second initial image data, calling compensation data stored in a first display compensation value random access memory to compensate the second initial image data, and outputting third compensated image data to a display image data random access memory;
and the third compensated image data is transmitted to a display panel of the electronic client through a gamma circuit, and the display panel displays images according to the third compensated image data.
6. The image display method of the OLED display device according to claim 5, wherein the compensation data stored in the second display compensation value random access memory includes compensation data corresponding to a 60Hz frame frequency;
the compensation data stored in the first display compensation value random memory comprises compensation data corresponding to 90Hz frame frequency and compensation data corresponding to 120Hz frame frequency.
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| CN114724506A (en) * | 2021-01-04 | 2022-07-08 | 北京小米移动软件有限公司 | Electronic equipment, display method, display device and storage medium |
| TWI785461B (en) * | 2021-01-13 | 2022-12-01 | 敦泰電子股份有限公司 | Display driver circuit system |
| CN114765015A (en) * | 2021-01-13 | 2022-07-19 | 敦泰电子股份有限公司 | Display driving circuit system |
| CN113129802B (en) * | 2021-04-22 | 2022-09-02 | 昆山国显光电有限公司 | Drive chip, data storage method and display device |
| CN113724662A (en) * | 2021-07-08 | 2021-11-30 | 芯颖科技有限公司 | Display module, display device and compensation method |
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