CN108510940B - Display screen, and display screen brightness compensation method and compensation device - Google Patents
Display screen, and display screen brightness compensation method and compensation device Download PDFInfo
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- 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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Abstract
The invention relates to a display screen, a compensation method and a compensation device for the brightness of the display screen, wherein the display screen comprises a detection component, an FPC (flexible printed circuit) and a control chip; the detection component is used for collecting a first driving current corresponding to a pixel in the first display area and a second driving current corresponding to a pixel in the second display area. And the control chip is used for acquiring a first driving current corresponding to a pixel in the first display area and a second driving current corresponding to a pixel in the second display area, determining a compensation gain of a data voltage corresponding to the pixel in the first display area according to the first driving current and the second driving current when the first driving current is larger than the second driving current, and adjusting the data voltage corresponding to the pixel in the first display area according to the compensation gain so as to enable the adjusted first driving current to be equal to the adjusted second driving current. The display screen solves the technical problem that the brightness of the display image in the special-shaped display area and the non-special-shaped display area is not uniform.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display screen, a display screen brightness compensation method and a display screen brightness compensation device.
Background
At present, the display screen of a common display device, such as a monitor, a television, a mobile phone, a tablet computer, etc., is usually regular rectangular. With the development of display technology, a rectangular display screen cannot meet diversified use requirements of users. Thus, the shapes of display screens are increasingly diversified.
In general, a non-rectangular display screen is referred to as a contoured display screen. The special-shaped display screen comprises a special-shaped display area and a normal display area. The number of pixels of each line in the special-shaped display area is different from that of pixels of each line in the normal display area.
In the conventional technology, since the display screen is shaped in a special shape, the length of the data lines for transmitting data voltage signals in the display screen is different, and the length of the data lines is related to the wiring impedance, the uniformity of the display effect of the image is poor due to the different wiring impedances corresponding to the data lines with different lengths when the image is displayed on the display screen, and the display effect is affected.
Disclosure of Invention
Therefore, it is necessary to provide a display screen, a method and a device for compensating the brightness of the display screen, which aim at the technical problem in the prior art that the brightness of the display image in the special-shaped display area and the non-special-shaped display area is not uniform.
A display screen comprises a display area and a non-display area, wherein the non-display area is positioned around the display area, the display area comprises a first display area and a second display area, and the first display area and the second display area are both provided with pixels arranged in an array manner; the display screen also comprises a detection component, an FPC and a control chip; the detection component is positioned in the non-display area and used for collecting a first driving current corresponding to a pixel in the first display area and a second driving current corresponding to a pixel in the second display area; the FPC is electrically connected with the detection component and is used for sending the signals collected by the detection component to the control chip; the control chip is used for obtaining a first driving current corresponding to a pixel in the first display area and a second driving current corresponding to a pixel in the second display area, when the first driving current is larger than the second driving current, determining a compensation gain of a data voltage corresponding to the pixel in the first display area according to the first driving current and the second driving current, and adjusting the data voltage corresponding to the pixel in the first display area according to the compensation gain so that the adjusted first driving current is equal to the second driving current.
Optionally, in the foregoing display screen, the display screen further includes a comparison feedback module, located in the non-display region, and configured to compare the first driving current with the second driving current, and obtain a gain signal of a data voltage corresponding to a pixel in the first display region according to a comparison result.
Optionally, in the display screen, the detection unit is further configured to acquire a first power voltage corresponding to a pixel in the first display area and a second power voltage corresponding to a pixel in the first display area; the control chip is further configured to determine a compensation gain of a data voltage corresponding to a pixel in the first display area according to the first driving current, the second driving current, the first power voltage, and the second power voltage.
A display screen brightness compensation method comprises a first display area and a second display area, wherein the first display area and the second display area are both provided with pixels arranged in an array manner; the method comprises the following steps: acquiring a first driving current corresponding to a pixel in the first display area and a second driving current corresponding to a pixel in the second display area; when the first driving current is larger than the second driving current, determining a compensation gain of a data voltage corresponding to a pixel in the first display area according to the first driving current and the second driving current; and adjusting the data voltage corresponding to the pixels in the first display area according to the compensation gain so as to enable the adjusted first driving current to be equal to the second driving current.
Optionally, in the compensation method, the determining a compensation gain of a data voltage corresponding to a pixel in the first display area according to the first driving current and the second driving current includes: determining a first relation between a driving current and a data voltage according to a driving current formula of the organic light emitting diode; and determining the compensation gain of the data voltage corresponding to the pixel in the first display area according to the first driving current, the second driving current and the first relation.
Optionally, in the compensation method, the determining a compensation gain of a data voltage corresponding to a pixel in the first display area according to the first driving current, the second driving current and the first relationship includes: obtaining a ratio of the first driving current to the second driving current according to the first driving current and the second driving current; and determining the compensation gain of the data voltage corresponding to the pixel in the first display area according to the ratio and the first relation.
Optionally, in the foregoing compensation method, before determining the compensation gain of the data voltage corresponding to the pixel in the first display area according to the first driving current and the second driving current, the method further includes: acquiring a first power supply voltage corresponding to a pixel in the first display area and a second power supply voltage corresponding to the pixel in the first display area;
the determining a compensation gain of a data voltage corresponding to a pixel in the first display region according to the first driving current and the second driving current includes:
and determining the compensation gain of the data voltage corresponding to the pixel in the first display area according to the first driving current, the second driving current, the first power voltage and the second power voltage.
Optionally, in the compensation method, the determining a compensation gain of a data voltage corresponding to a pixel in the first display area according to the first driving current, the second driving current, the first power voltage, and the second power voltage includes: determining a second relation among the driving current, the power voltage and the data voltage according to a saturation current formula of the organic light emitting diode; and determining the compensation gain of the data voltage corresponding to the pixel in the first display area according to the first driving current, the second driving current, the first power voltage, the second power voltage and the second relation.
The display screen comprises a first display area and a second display area, wherein the first display area and the second display area are both provided with pixels arranged in an array mode. The device comprises: the driving current detection module is used for acquiring a first driving current corresponding to a pixel in the first display area and a second driving current corresponding to a pixel in the second display area; a compensation gain determining module, configured to determine, when the first driving current is greater than the second driving current, a compensation gain of a data voltage corresponding to a pixel in the first display area according to the first driving current and the second driving current; and the amplifying module is used for adjusting the data voltage corresponding to the pixel in the first display area according to the compensation gain so as to enable the adjusted first driving current to be equal to the second driving current.
A display screen comprises a display part and a controller, wherein the display part comprises a first display area and a second display area, and the first display area and the second display area are both provided with pixels arranged in an array; the controller is electrically connected to the display component, the controller comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the compensation method as described above.
According to the display screen, the compensation method and the compensation device for the brightness of the display screen, the first driving current of the first display area and the second driving current of the second display area are obtained, when the first driving current is larger than the second driving current, the compensation gain of the data voltage corresponding to the pixels in the first display area is determined according to the first driving current and the second driving current, and therefore the data voltage corresponding to the pixels in the first display area is adjusted according to the compensation gain so that the data voltage corresponding to the first display area is equal to the data voltage corresponding to the second display area, the first driving current is equal to the second driving current, the technical problem that the brightness of images displayed in a special-shaped display area and a non-special-shaped display area is uneven is solved, and the display effect is improved.
Drawings
FIG. 1a is a flow chart illustrating a method for compensating brightness of a display screen according to an embodiment;
FIG. 1b is a schematic diagram of the structure of a display screen in one embodiment;
FIG. 2 is a flowchart illustrating the step S120 according to one embodiment;
FIG. 3 is a flowchart illustrating the step S220 according to one embodiment;
FIG. 4 is a flowchart illustrating a method for compensating for display screen brightness according to an embodiment;
FIG. 5 is a flowchart illustrating the step S420 according to one embodiment;
FIG. 6 is a flowchart illustrating a method for compensating for display screen brightness according to one embodiment;
FIG. 7 is a block diagram showing the structure of a device for compensating the brightness of a display screen according to an embodiment;
FIG. 8 is a schematic diagram of a display screen in one embodiment;
fig. 9 is a schematic structural diagram of a display screen in one embodiment.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In an embodiment, referring to fig. 1a, the present application provides a method for compensating brightness of a display screen, where the display screen includes a first display area and a second display area, and the first display area and the second display area are both provided with pixels arranged in an array, and the method includes the following steps:
s110, acquiring a first driving current corresponding to a pixel in the first display area and a second driving current corresponding to a pixel in the second display area.
And S120, when the first driving current is larger than the second driving current, determining a compensation gain of the data voltage corresponding to the pixel in the first display area according to the first driving current and the second driving current.
S130, adjusting the data voltage corresponding to the pixel in the first display area according to the compensation gain so that the adjusted first driving current is equal to the adjusted second driving current.
Referring to fig. 1b, the display screen includes a display area and a non-display area 110, and the non-display area 110 is located around the display area. The display area is divided into a first display area 120 and a second display area 130, and the first display area 120 and the second display area 130 are each provided with pixels 140 arranged in an array. The non-display area is provided with a scan driving circuit (not shown) and a sensing module (not shown), the scan driving circuit is connected to a plurality of pixels 140 arranged in a matrix form through scan signal lines S10 to Sn0, the pixels 140 are also connected to data signal lines D1 to Dm, and are connected to a data driving circuit (not shown) located in the non-display area through data signal lines D1 to Dm. The data signal lines D1 through Dm are substantially perpendicular to the scan signal lines S10 through Sn 0. The number of pixels in the first display area 120 is different from the number of pixels distributed in the second display area 130. The driving current refers to a current flowing through the organic light emitting diode to make the pixel emit light.
Specifically, a first driving current corresponding to a pixel in the first display area 120 and a second driving current corresponding to a pixel in the second display area 130 are obtained through the detection module. The first drive current and the second drive current are compared. When the number of pixels per column in the first display area 120 is less than the number of pixels per column in the second display area 130, the first driving current is greater than the second driving current. According to the first driving current and the second driving current, a relationship between the data voltages corresponding to the pixels in the first display region 120 and the data voltages corresponding to the pixels in the second display region 130 may be determined, and a compensation gain of the data voltages corresponding to the pixels in the first display region 120 may be further determined. According to the compensation gain of the data voltage corresponding to the pixel in the first display area 120, the data voltage corresponding to the pixel in the first display area 120 is adjusted, so that the data voltage corresponding to the pixel in the first display area 120 is equal to the data voltage corresponding to the pixel in the second display area 130, and the adjusted first driving current is equal to the adjusted second driving current.
It will be appreciated that the distinction between the first display region and the second display region is relative. In the present application, a partial region with a small number of pixels in the display region is used as a "first display region"; the partial region having a larger number of pixels in the display region is referred to as a "second display region". A partial region with a larger number of pixels in the display region may also be used as the "first display region"; the partial region having the smaller number of pixels in the display region is referred to as a "second display region". Then, when the first driving current corresponding to the first display area is smaller than the second driving current corresponding to the second display area, determining a compensation gain corresponding to a pixel in the second display area according to the first driving current and the second driving current, and adjusting a data voltage corresponding to the pixel in the second display area according to the compensation gain so that the adjusted second driving current is equal to the first driving current.
In the method for compensating the brightness of the display screen, the first driving current and the second driving current respectively corresponding to the first display area and the second display area are obtained, the compensation gain of the data voltage corresponding to the pixels in the first display area is determined according to the first driving current and the second driving current, and the data voltage corresponding to the pixels in the first display area is adjusted according to the determined compensation gain, so that the adjusted data voltage corresponding to the pixels in the first display area is equal to the adjusted data voltage corresponding to the pixels in the second display area, and the adjusted first driving current is equal to the adjusted second driving current, thereby solving the technical problem of uneven brightness of the light in the first display area and the second display area.
In one embodiment, referring to fig. 2, determining a compensation gain of a data voltage corresponding to a pixel in a first display area according to a first driving current and a second driving current includes the following steps:
s210, determining a first relation between the driving current and the data voltage according to a driving current formula of the organic light emitting diode.
S220, determining a compensation gain of the data voltage corresponding to the pixel in the first display area according to the first driving current, the second driving current and the first relation.
The formula of the driving current flowing through the organic light emitting diode OLED is as follows:
μ is the electron mobility of the thin film transistor, Cox is the gate oxide capacitance per unit area of the thin film transistor, W is the channel width of the thin film transistor, L is the channel length of the thin film transistor, Vsg is the source-gate voltage drop of transistor D1, and Vth is the threshold voltage of transistor D1. From the above formula, it can be known that the driving current flowing through the organic light emitting diode OLED has a close relationship with the gate voltage, the source voltage and the threshold voltage of the driving transistor. Pixel driving circuits such as 6T1C, 7T1C, etc. have appeared in the prior art, which can compensate for the variation in driving current caused by the threshold voltage Vth. The driving current flowing through the organic light emitting diode OLED is expressed by the following formula:
according to the above formula, when the power voltage signal VDD corresponding to each pixel in the display panel is consistent, the first relationship between the driving current passing through the organic light emitting diode OLED and the data voltage signal Vdata is:
the power supply voltage signal VDD is a dc voltage signal. Specifically, a first relationship of the driving current I and the data voltage Vdata is determined according to a driving current formula of the organic light emitting diode. Further, according to the first driving current, the second driving current and the first relationship, that is, the first driving current I1 and the second driving current I2 are brought into the first relationship between the driving current and the data voltage signal Vdata, the relationship between the data voltage corresponding to the pixel in the first display area and the data voltage corresponding to the pixel in the second display area is obtained, so that the compensation gain of the data voltage corresponding to the pixel in the first display area is determined.
In the above compensation method for the brightness of the display screen, when the power voltage signals corresponding to each pixel in the display screen are consistent, the compensation gain of the data voltage corresponding to the pixel in the first display area is calculated according to the first relation between the driving current and the data voltage signal brought by the first driving current and the second driving current, so that the data voltage corresponding to the pixel in the first display area can be accurately adjusted, and the technical problem of uneven brightness of the light emitted in the first display area 120 and the second display area 130 is solved.
In one embodiment, referring to fig. 3, determining a compensation gain of a data voltage corresponding to a pixel in a first display area according to a first driving current, a second driving current and a first relationship includes the following steps:
and S310, obtaining a ratio of the first driving current to the second driving current according to the first driving current and the second driving current.
S320, determining the compensation gain of the data voltage corresponding to the pixel in the first display area according to the obtained ratio and the first relation.
Specifically, the detection module detects the first driving current I1 and the second driving current I2, and obtains a ratio K of the first driving current to the second driving current by using the first driving current I1 to be greater than the second driving current I2. The power supply voltage signal VDD is a dc power supply signal, and the power supply voltage signal VDD is equal to a suitable fixed value, generally, the range of the VDD value may be a fixed constant U between 4V and 5V, and further, the ratio K of the first driving current and the second driving current and the fixed power supply voltage U are substituted into the first relationship, so as to obtain:
according to the formula, the relation between the data voltage corresponding to the pixel in the first display area and the data voltage corresponding to the pixel in the second display area can be known, and the compensation gain of the data voltage corresponding to the pixel in the first display area is determined.
In an embodiment, referring to fig. 4, before determining a compensation gain of a data voltage corresponding to a pixel in the first display area according to the first driving current and the second driving current, the compensation method further includes:
s410, acquiring a first power supply voltage corresponding to the pixels in the first display area and a second power supply voltage corresponding to the pixels in the second display area.
Determining a compensation gain of a data voltage corresponding to a pixel in the first display region according to the first driving current and the second driving current, comprising:
s420, determining a compensation gain of a data voltage corresponding to a pixel in the first display area according to the first driving current, the second driving current, the first power voltage and the second power voltage.
Specifically, a first driving current corresponding to a pixel in the first display area and a second driving current corresponding to a pixel in the second display area are obtained through the detection module. The detection module can also obtain a first power supply voltage corresponding to the pixels in the first display area and a second power supply voltage corresponding to the pixels in the second display area. Further, a ratio relation between a data voltage corresponding to the pixel in the first display area and a data voltage corresponding to the pixel in the second display area is determined according to a first driving current and a first power voltage corresponding to the pixel in the first display area, a second driving current and a second power voltage corresponding to the pixel in the second display area, so that a compensation gain of the data voltage corresponding to the pixel in the first display area can be determined.
In the above compensation method for the brightness of the display screen, because the trace resistors exist on the conductive wires for transmitting the power voltage signals, the lengths of the conductive wires for transmitting the power voltage signals to the pixels in the first display area and the pixels in the second display area are different, and the pixels in the first display area and the pixels in the second display area respectively correspond to different power voltage signals. The detection module is used for respectively obtaining a first power supply voltage corresponding to the pixels in the first display area and a second power supply voltage corresponding to the pixels in the second display area, so that the compensation gain of the data voltage corresponding to the pixels in the first display area is determined according to the first driving current, the first power supply voltage, the second driving current and the second power supply voltage. And adjusting the data voltage corresponding to the pixels in the first display area according to the determined compensation gain, so that the adjusted data voltage corresponding to the pixels in the first display area is equal to the adjusted data voltage corresponding to the pixels in the second display area, and the adjusted first driving current is equal to the adjusted second driving current, thereby solving the technical problem of nonuniform light-emitting brightness in the first display area and the second display area.
In one embodiment, referring to fig. 5, determining a compensation gain of a data voltage corresponding to a pixel in a first display area according to a first driving current, a second driving current, a first power voltage and a second power voltage includes the following steps:
and S510, determining a second relation among the driving current, the power voltage and the data voltage according to a driving current formula of the organic light emitting diode.
S520, determining a compensation gain of the data voltage corresponding to the pixel in the first display area according to the first driving current, the second driving current, the first power voltage, the second power voltage and the second relation.
After compensating the threshold voltage Vth, the driving current flowing through the organic light emitting diode OLED is represented by the following formula:
then the second relationship among the driving current, the power voltage and the data voltage is:
specifically, I1, VDD1, Vdata1 are the first driving current, the first power voltage and the first data voltage corresponding to the pixels in the first display region, respectively. I2, VDD2, Vdata2 are the second driving current, the second power voltage and the second data voltage corresponding to the pixels in the second display region, respectively. Because the trace resistance exists on the conductive line for transmitting the power voltage signal, and the conductive line for transmitting the first power voltage signal and the trace resistance on the conductive line for transmitting the first power voltage signal are not equal, the pixels in the first display area and the pixels in the second display area respectively correspond to different power voltage signals, that is, VDD1 is not equal to VDD 2. The first driving current I1, the first power voltage VDD1, the second driving current I2 and the second power voltage VDD2 are brought into a second relation to obtain the relation between the data voltage corresponding to the pixels in the first display area and the data voltage corresponding to the pixels in the second display area, and therefore the compensation gain of the data voltage corresponding to the pixels in the first display area is determined.
In the above compensation method for the brightness of the display screen, due to the trace resistance of the power line, the detection module obtains the first power voltage corresponding to the pixels in the first display area and the second power voltage corresponding to the pixels in the second display area, and the compensation gain of the data voltage corresponding to the pixels in the first display area is calculated by taking the first driving current I1, the first power voltage VDD1, the second driving current I2 and the second power voltage VDD2 into the second relation. By comprehensively considering the influence factors of the data voltage signals, the data voltage corresponding to the pixels in the first display area can be more accurately adjusted, so that the technical problem of uneven light emitting brightness in the first display area and the second display area is solved.
In an embodiment, referring to fig. 6, an embodiment of the present application provides a method for compensating luminance of a display screen, including the following steps:
s610, acquiring a first power supply voltage corresponding to the pixels in the first display area and a second power supply voltage corresponding to the pixels in the second display area.
S620, acquiring a first power supply voltage corresponding to the pixels in the first display area and a second power supply voltage corresponding to the pixels in the first display area.
S630, determining a second relation among the driving current, the power voltage and the data voltage according to a saturation current formula of the organic light emitting diode.
And S640, obtaining a ratio of the first driving current to the second driving current according to the first driving current and the second driving current.
And S650, when the first driving current is larger than the second driving current, determining the compensation gain of the data voltage corresponding to the pixel in the first display area according to the obtained ratio and the second relation.
And S660, adjusting the data voltage corresponding to the pixel in the first display area according to the compensation gain so that the adjusted first driving current is equal to the adjusted second driving current.
In this embodiment, a first driving current corresponding to a pixel in the first display area and a second driving current corresponding to a pixel in the second display area are obtained through the detection module. And acquiring a first power supply voltage corresponding to the pixels in the first display area and a second power supply voltage corresponding to the pixels in the second display area through the detection module. After compensating for the threshold voltage Vth, the driving current flowing through the organic light emitting diode OLED is formulated as:
then the second relationship among the driving current, the power voltage and the data voltage is:
i1, VDD1, Vdata1 are the first driving current, the first power voltage and the first data voltage corresponding to the pixels in the first display region, respectively. I2, VDD2, Vdata2 are the second driving current, the second power voltage and the second data voltage corresponding to the pixels in the second display region, respectively.
By using the first driving current I1 to the second driving current I2, a ratio K0 of the first driving current to the second driving current is obtained. Substituting the ratio K0 of the first driving current and the second driving current into the second relation, then:
and the detection module can obtain a first power voltage corresponding to the pixels in the first display area and a second power voltage corresponding to the pixels in the second display area, so that the relation between the data voltage corresponding to the pixels in the first display area and the data voltage corresponding to the pixels in the second display area can be known according to the formula. When the first driving current is larger than the second driving current, the compensation gain of the data voltage corresponding to the pixel in the first display area can be further determined. And adjusting the data voltage corresponding to the pixels in the first display area according to the compensation gain of the data voltage corresponding to the pixels in the first display area, so that the data voltage corresponding to the pixels in the first display area is equal to the data voltage corresponding to the pixels in the second display area, and the adjusted first driving current is equal to the adjusted second driving current.
In the above compensation method for the brightness of the display screen, the pixels in the first display area and the pixels in the second display area are different corresponding to the power supply voltage signal respectively because the wiring resistor exists on the conductive wire for transmitting the power supply voltage signal. And respectively acquiring a first power supply voltage corresponding to the pixels in the first display area and a second power supply voltage corresponding to the pixels in the second display area through the detection module, so as to determine the compensation gain of the data voltage corresponding to the pixels in the first display area according to the first driving current, the first power supply voltage, the second driving current, the second power supply voltage and the second relation. And adjusting the data voltage corresponding to the pixels in the first display area according to the determined compensation gain, so that the adjusted data voltage corresponding to the pixels in the first display area is equal to the adjusted data voltage corresponding to the pixels in the second display area, and the adjusted first driving current is equal to the adjusted second driving current, thereby solving the technical problem of nonuniform light-emitting brightness in the first display area and the second display area. In this embodiment, the influence factors of the data voltage signal are considered comprehensively, so that the data voltage corresponding to the pixels in the first display area can be adjusted more accurately, and the technical problem of uneven light emitting brightness in the first display area and the second display area is solved.
It should be understood that although the various steps in the flow charts of fig. 1-6 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in the diagrams X-Y may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performing the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternately with other steps or at least some of the sub-steps or stages of other steps.
In an embodiment, please refer to fig. 7, the present application provides a device 700 for compensating brightness of a display screen, where the display screen includes a first display area and a second display area, and the first display area and the second display area are both provided with pixels arranged in an array; the device comprises:
the driving current detection module 710 is configured to obtain a first driving current corresponding to a pixel in the first display area and a second driving current corresponding to a pixel in the second display area.
And a compensation gain determining module 720, configured to determine a compensation gain of the data voltage corresponding to the pixel in the first display area according to the first driving current and the second driving current when the first driving current is greater than the second driving current.
The amplifying module 730 is configured to adjust a data voltage corresponding to a pixel in the first display area according to the compensation gain, so that the adjusted first driving current is equal to the second driving current.
For the specific definition of the compensation device, reference may be made to the above definition of the compensation method, which is not described herein again. The modules in the compensation device can be wholly or partially realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent of a processor in a display screen, and can also be stored in a memory in computer equipment in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, the present application provides a display screen, which includes a display part and a controller, wherein the display part includes a first display area and a second display area, and the first display area and the second display area are both provided with pixels arranged in an array; the controller is electrically connected with the display part, and the controller comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, and when the program is executed by the processor, the steps in the touch screen control method provided by the above embodiments are realized. It should be noted that, as will be understood by those skilled in the art, all or part of the processes in the methods of the above embodiments may be implemented by a computer program, which may be stored in a non-volatile computer readable storage medium, and the computer program may include the processes of the above embodiments of the methods when executed.
In one embodiment, referring to fig. 8, the present application provides a display screen, where the display screen includes a display area and a non-display area, the non-display area is located around the display area, and the non-display area may include an area 811, an area 812, an area 820, an area 830, an area 840, and other positions without pixels. The display region includes a first display region 850 and a second display region (not shown), and the first display region 850 and the second display region are each provided with pixels arranged in an array. The display also includes a detection section 860, an FPC (not shown), and a control chip 870.
The detecting unit 860 is disposed in the non-display region and is configured to collect a first driving current corresponding to a pixel in the first display region 850 and a second driving current corresponding to a pixel in the second display region.
And an FPC electrically connected to the detection part 860, for transmitting the signal collected by the detection part 860 to the control chip 870.
The control chip 870 is configured to obtain a first driving current corresponding to a pixel in the first display area 850 and a second driving current corresponding to a pixel in the second display area, determine a compensation gain of a data voltage corresponding to a pixel in the first display area 850 according to the first driving current and the second driving current when the first driving current is greater than the second driving current, and adjust the data voltage corresponding to a pixel in the first display area 850 according to the compensation gain so that the adjusted first driving current is equal to the second driving current.
The control chip 870 is connected to the pixels in the first display area 850 and the second display area through different data signal lines 880, and provides data voltage signals to the pixels in the first display area 850 and the second display area. Since the number of pixels in the first display area is different from that in the second display area, and the length of the data signal line 880 corresponding to the first display area 850 is different from that of the data signal line 880 corresponding to the second display area, the luminance of the first display area 850 is not uniform from that of the second display area. Specifically, a first driving current corresponding to a pixel in the first display area 850 and a second driving current corresponding to a pixel in the second display area are obtained by the detection module and sent to the control chip 870. The control chip 870 obtains a first driving current corresponding to a pixel in the first display area 850 and a second driving current corresponding to a pixel in the second display area. When the first driving current is greater than the second driving current, the control chip 870 determines a compensation gain of the data voltage corresponding to the pixel in the first display area 850 according to the first driving current and the second driving current, and adjusts the data voltage corresponding to the pixel in the first display area 850 according to the compensation gain so that the adjusted first driving current is equal to the second driving current.
In an embodiment, referring to fig. 9, the display panel provided in the present application further includes a comparison feedback module 910, located in the non-display area, for comparing the first driving current and the second driving current, and obtaining a gain signal of the data voltage corresponding to the pixel in the first display area according to the comparison result. Specifically, the comparison feedback module 910 is electrically connected to the detection module 860, the detection module 860 sends the first driving current and the second driving current to the comparison feedback module 910, and the comparison feedback module 910 compares the first driving current and the second driving current. The comparison feedback module 910 may obtain a gain signal of the data voltage corresponding to the pixel in the first display region according to the comparison result. The comparison feedback module 910 sends the gain signal to the control chip 870.
In one embodiment, the detection component of the display screen provided by the present application is further configured to acquire a first power voltage corresponding to a pixel in the first display area and a second power voltage corresponding to a pixel in the first display area. The control chip is further used for determining compensation gain of data voltage corresponding to the pixels in the first display area according to the first driving current, the second driving current, the first power voltage and the second power voltage. In this embodiment, for specific limitations of the detection module and the control chip of the display screen, reference may be made to the above limitations on the compensation method, which is not described herein again.
It should be noted that the number of pixels in the first display area is different from the number of pixels in the second display area, for example, referring to fig. 1, the number of pixels in each row in the first display area may be different from the number of pixels in each row in the second display area, and for example, referring to fig. 8, the number of pixels in each column in the first display area may also be different from the number of pixels in each column in the second display area.
The present application does not limit the manner in which the first display area and the second display area are divided. For example, referring to fig. 1, the first display area may be a horizontal first display area 130; for another example, referring to fig. 8, the first display area may be a vertical first display area 850.
The number of the first display areas and the number of the second display areas are not limited in the present application. For example, the first display area may include a plurality of first sub-display areas, and the first display area may be divided into a plurality of first sub-display areas according to the number of pixels in each row/column; the second display region may include a plurality of second sub-display regions, and the second display region may be divided into a number of second sub-display regions according to the number of pixels per row/column.
No matter how the first display area and the second display area are divided or how the number of the first display area and the second display area is, the detection module can be used for detecting the first driving current and the second driving current respectively corresponding to the pixels in the first display area and the second display area, so as to determine the corresponding display area with larger driving current, and adjust the data voltage corresponding to the display area to enable the first driving current to be equal to the second driving current. The driving currents corresponding to the pixels in the first sub-display area and the second sub-display area can be detected through the detection module, a plurality of corresponding sub-display areas with larger driving currents are further determined, and the data voltages corresponding to the plurality of sub-display areas are adjusted, so that the brightness of the display screen is uniform.
It will be appreciated that the distinction between the first display area and the second display area is relative. In the present application, a partial region with a small number of pixels in the display region is used as a "first display region"; the partial region having a larger number of pixels in the display region is referred to as a "second display region".
In addition, the terms "first", "second", and the like used in the embodiments of the present application may be used herein to describe various elements, but the elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, the first display region may be referred to as the second display region, and similarly, the second display region may be referred to as the first display region without departing from the scope of the present application. Both the first display area and the second display area are display areas, but they are not the same display area.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (6)
1. A display screen, characterized in that the display screen comprises a display area and a non-display area, wherein the non-display area surrounds the display area; the display area comprises a first display area and a second display area, and the first display area and the second display area are both provided with pixels arranged in an array; the display screen also comprises a detection component, an FPC and a control chip;
the detection component is positioned in the non-display area and used for acquiring a first driving current and a first power voltage corresponding to a pixel in the first display area and a second driving current and a second power voltage corresponding to a pixel in the second display area;
the FPC is electrically connected with the detection component and is used for sending the signals collected by the detection component to the control chip;
the control chip is used for acquiring a first driving current and a first power voltage corresponding to a pixel in the first display area and a second driving current and a second power voltage corresponding to a pixel in the second display area, when the first driving current is larger than the second driving current, determining a compensation gain of a data voltage corresponding to the pixel in the first display area according to the first driving current, the first power voltage, the second driving current and the second power voltage, and adjusting the data voltage corresponding to the pixel in the first display area according to the compensation gain so that the adjusted first driving current is equal to the second driving current;
the control chip is respectively connected with the pixels in the first display area and the second display area through different data signal lines to provide data voltage signals for the pixels in the first display area and the second display area.
2. The display screen of claim 1, further comprising a comparison feedback module, located in the non-display area, for comparing the first driving current with the second driving current and obtaining a corresponding gain signal of the data voltage corresponding to the pixel in the first display area according to the comparison result.
3. The method for compensating the brightness of the display screen is characterized in that the display screen comprises a first display area and a second display area, and the first display area and the second display area are both provided with pixels arranged in an array manner; the method comprises the following steps:
acquiring a first driving current and a first power voltage corresponding to a pixel in the first display area and a second driving current and a second power voltage corresponding to a pixel in the second display area;
when the first driving current is larger than the second driving current, determining a compensation gain of a data voltage corresponding to a pixel in the first display area according to the first driving current, the first power voltage, the second driving current and the second power voltage;
adjusting the data voltage corresponding to the pixels in the first display area according to the compensation gain to enable the adjusted first driving current to be equal to the second driving current;
and respectively providing data voltages corresponding to the pixels in the first display area and the pixels in the second display area through different data signal lines.
4. The method of claim 3, wherein determining a compensation gain for a data voltage corresponding to a pixel in the first display region according to the first driving current, the second driving current, the first power voltage, and the second power voltage comprises:
determining a second relation among the driving current, the power voltage and the data voltage according to a saturation current formula of the organic light emitting diode;
and determining the compensation gain of the data voltage corresponding to the pixel in the first display area according to the first driving current, the second driving current, the first power voltage, the second power voltage and the second relation.
5. The device for compensating the brightness of the display screen is characterized in that the display screen comprises a first display area and a second display area, and the first display area and the second display area are both provided with pixels which are arranged in an array manner; the device comprises:
the driving current detection module is used for acquiring a first driving current and a first power supply voltage corresponding to a pixel in the first display area and a second driving current and a second power supply voltage corresponding to a pixel in the second display area;
a compensation gain determining module, configured to determine a compensation gain of a data voltage corresponding to a pixel in the first display area according to the first driving current, the first power voltage, the second driving current, and the second power voltage when the first driving current is greater than the second driving current;
and the amplifying module is used for adjusting the data voltage corresponding to the pixel in the first display area according to the compensation gain so as to enable the adjusted first driving current to be equal to the second driving current.
6. A display screen is characterized by comprising a display part and a controller, wherein the display part comprises a first display area and a second display area, and the first display area and the second display area are both provided with pixels arranged in an array; the controller is electrically connected to the display component, the controller comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program when executed by the processor implementing the steps of the method of any one of claims 3 to 4.
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| CN110942744A (en) * | 2018-09-21 | 2020-03-31 | 南京瀚宇彩欣科技有限责任公司 | Display brightness adjusting method and display driving method |
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