CN112017596A - Display panel, brightness adjusting method and display device - Google Patents
Display panel, brightness adjusting method and display device Download PDFInfo
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- CN112017596A CN112017596A CN202010950915.4A CN202010950915A CN112017596A CN 112017596 A CN112017596 A CN 112017596A CN 202010950915 A CN202010950915 A CN 202010950915A CN 112017596 A CN112017596 A CN 112017596A
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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
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
Abstract
The invention provides a display panel, a brightness adjusting method and a display device, wherein the display panel comprises: a display area and a non-display area surrounding the display area; the display area comprises a plurality of light emitting devices, a plurality of driving control circuits, a plurality of shunt devices and at least one input device, each light emitting device is coupled with one driving control circuit, each light emitting device is connected with one shunt device in parallel, and the at least one input device is coupled with the shunt devices; the non-display area comprises a display driving chip coupled with the plurality of driving control circuits, and the display driving chip is used for receiving image data of an image to be displayed; when the current light intensity of the display panel needs to be changed, at least one control current is input to the corresponding shunt device through the at least one input device, and the shunt device adjusts the working current flowing through the light-emitting device.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel, a brightness adjustment method, and a display device.
Background
With the development of display technologies, currently, display devices often have a function of adjusting brightness, and in a process that a user uses the display devices, the display devices may adjust their own brightness according to detected ambient light intensity, or the user may manually adjust the current brightness of the display devices when the display devices display brightness adjustment options.
The existing brightness adjustment for Organic Light-Emitting Diode (OLED) display devices mainly adopts Pulse Width Modulation (PWM) dimming and Direct Current (DC) dimming, and if PWM dimming is used to adjust the brightness of a display screen, screen flicker is easily caused due to continuous alternation of on and off. If the brightness of the display screen is adjusted by software DC dimming, for example, the brightness of the display screen is reduced by software DC dimming, a Central Processing Unit (CPU) is required to map the pixel value of the image to be displayed from a high gray level value to a low gray level value, so that the Processing load of the CPU is increased, and the color depth is also reduced.
Therefore, the brightness adjustment of the conventional OLED display device is very likely to cause the reduction of the display quality.
Disclosure of Invention
The invention provides a display panel, a brightness adjusting method and a display device, which are used for adjusting the brightness of OLED display equipment and simultaneously considering the display quality of the OLED display equipment.
In a first aspect, an embodiment of the present invention provides a display panel, including:
a display area and a non-display area surrounding the display area;
the display area comprises a plurality of light emitting devices, a plurality of driving control circuits, a plurality of shunt devices and at least one input device, wherein each light emitting device is coupled with one driving control circuit, each light emitting device is connected with one shunt device in parallel, and the at least one input device is coupled with the shunt devices;
the non-display area comprises a display driving chip coupled with the plurality of driving control circuits, and the display driving chip is used for receiving image data of an image to be displayed; when the display panel displays the image to be displayed and the current light intensity of the display panel needs to be changed, at least one control current is input to the corresponding shunt device through the at least one input device, and the shunt device adjusts the working current flowing through the light-emitting device.
In one possible embodiment, the first gate of each of the input devices is coupled to the second gate of each of the shunting devices, the first pole of each of the input devices is shorted to the first gate of the corresponding input device, the first pole of each of the shunting devices is coupled to the anode of the corresponding light emitting device, the second pole of each of the shunting devices and the second pole of the corresponding input device are both coupled to a first power supply terminal, and the cathode of each of the light emitting devices is coupled to the first power supply terminal.
In a possible embodiment, the display area includes a plurality of display areas, each of the display areas is provided with one of the input devices, and each of the light emitting devices in each of the display areas shares the same one of the input devices.
In one possible embodiment, the plurality of light emitting devices includes at least two colors of the light emitting devices, and the light emitting devices of the same color share the same input device.
In one possible embodiment, the input device is disposed in a region of the display area where the light emitting device is located.
In a possible implementation manner, each input device is arranged in an area range where the light emitting device is located corresponding to the middle area of the display area.
In one possible implementation, each of the driving control circuits includes a first switching transistor, a second switching transistor, and a capacitor, wherein a third gate of the first switching transistor is coupled to a scan signal terminal, a first pole of the first switching transistor is coupled to a fourth gate of the second switching transistor, a second pole of the first switching transistor is coupled to a data signal terminal, a first pole of the second switching transistor is coupled to a second power supply terminal, a second pole of the second switching transistor is coupled to an anode of the corresponding light emitting device, a first end of the capacitor is coupled to the second power supply terminal, and a second end of the capacitor is coupled to a fourth gate of the second switching transistor.
In a second aspect, an embodiment of the present invention provides a display device, including:
the display panel as described above;
a dimming circuit coupled to the at least one input device;
a central processing unit coupled to the dimming circuit; wherein the content of the first and second substances,
the central processing unit is used for sending the image data of the image to be displayed to the display driving chip and sending at least one dimming instruction to the dimming circuit when the current light intensity of the display panel is determined to be required to be changed;
the dimming circuit is used for generating at least one control current corresponding to the at least one dimming command and inputting the at least one control current to the at least one input device;
the at least one input device is used for inputting the at least one control current to the plurality of shunt devices;
the plurality of shunt devices are used for adjusting the working current flowing through the plurality of light-emitting devices.
In one possible embodiment, the dimming circuit is located in the non-display area.
In a third aspect, an embodiment of the present invention further provides a method for adjusting luminance of a display panel, where the method includes:
when the display panel displays the image to be displayed and the current light intensity of the display panel is determined to need to be changed, the at least one control current is input to the corresponding shunt device through the at least one input device;
and under the action of the at least one control current on the shunt device, changing the working current of the light-emitting device connected with the shunt device in parallel.
The invention has the following beneficial effects:
the embodiment of the invention provides a display panel, a brightness adjusting method and a display device, wherein the display panel comprises: the display area comprises a plurality of light-emitting devices, a plurality of driving control circuits, a plurality of shunt devices and at least one input device, wherein each light-emitting device is coupled with one driving control circuit and is connected with one shunt device in parallel, and the at least one input device is coupled with the shunt devices; the non-display area comprises a display driving chip coupled with a plurality of driving control circuits, the display driving chip is used for receiving image data of an image to be displayed, when the display panel displays the image to be displayed, and when the current light intensity of the display panel needs to be changed, at least one control current is input to a corresponding shunt device through at least one input device, and the shunt device adjusts the working current flowing through the light-emitting device. That is to say, each light emitting device is connected in parallel with one shunt device, when the display panel displays an image to be displayed, once the current light intensity of the display panel needs to be changed is determined, the working current of the light emitting device connected in parallel with each shunt device can be adjusted by adjusting the magnitude of at least one control current input to the plurality of shunt devices through at least one input device, and further the adjustment of the light emitting brightness of each light emitting device is realized. In this way, the brightness of the display panel is adjusted and the display quality is also improved.
Drawings
FIG. 1 is a schematic diagram of a structure of an OLED display device in the related art;
FIG. 2 is a schematic diagram of an OLED display device according to the related art;
FIG. 3 is a schematic diagram of one structure of a display panel according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of one structure of a display panel according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a display panel including two display regions according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of one of the structures of the display panel in which light-emitting devices of the same color share the same input device;
FIG. 7 is a schematic diagram of one structure of a display panel according to an embodiment of the present invention;
FIG. 8 is a schematic view of a display panel according to an embodiment of the present invention;
FIG. 9 is a schematic view of one structure of a display panel according to an embodiment of the present invention;
FIG. 10 is a schematic view of a display panel according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a display device according to an embodiment of the present invention;
fig. 12 is a flowchart of a method for adjusting brightness of a display panel according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. And the embodiments and features of the embodiments may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of the word "comprise" or "comprises", and the like, in the context of this application, is intended to mean that the elements or items listed before that word, in addition to those listed after that word, do not exclude other elements or items.
It should be noted that the sizes and shapes of the figures in the drawings are not to be considered true scale, but are merely intended to schematically illustrate the present invention. And the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.
In the prior art, when the brightness of the display screen is adjusted by PWM dimming, take the OLED display device shown in fig. 1 as an example, where the pixel driving structure 1 (the area shown by the dashed line frame in fig. 1) in the display panel adopts the structure of 2T1C, Gate represents the scanning line, Data represents the Data line, VDD represents the high potential signal, OLED represents the light emitting device, IC represents the display driving chip, and CPU represents the central processing unit, for example, when the user reduces the brightness of the display screen of the OLED display device, the pixel is lit by the EM signal in the form of pulse, and the lower the brightness, the smaller the duty ratio of the lighting time of the pixel accordingly. Although the whole brightness adjustment process can keep the display data unchanged and the color depth unchanged, the display screen flickers due to the continuous on-off of the pixels, and human eyes are easy to feel uncomfortable. In addition, when the brightness of the display screen is adjusted by using software DC dimming, the OLED display device shown in fig. 2 is taken as an example, wherein the pixel driving structure 1 (the area indicated by the dashed line frame in fig. 2) in the display panel still adopts the structure of 2T1C, Gate represents a scanning line, Data represents a Data line, VDD represents a high potential signal, OLED represents a light emitting device, IC represents a display driving chip, and CPU represents a central processing unit. Although the display screen can be prevented from flickering in the whole brightness adjustment process, when the brightness of a user is reduced, the CPU needs to map the high-gray-scale value to the low-gray-scale value through certain operation on the pixel value of the original image to be displayed, so that the processing burden of the CPU is increased, and the color depth is reduced. For example, the original image data is displayed in 8-bit red, and after the user reduces the brightness of the display screen, the original highest 255 gray scale value is mapped to 32 gray scale values, and accordingly, the display screen has only a color depth of 32 gray scale values at low brightness, thereby causing the display quality to be degraded.
In view of this, embodiments of the present invention provide a display panel, a brightness adjusting method and a display apparatus, which are used for adjusting the brightness of an OLED display device and simultaneously considering the display quality of the OLED display device.
Fig. 3 is a schematic structural diagram of a display panel according to an embodiment of the present invention, specifically, the display panel includes:
a display area A and a non-display area B surrounding the display area A;
the display area a comprises a plurality of light emitting devices L, a plurality of driving control circuits 10, a plurality of shunting devices 20 and at least one input device 30, wherein each light emitting device L is coupled to one driving control circuit 10, each light emitting device L is connected in parallel to one shunting device 20, and at least one input device 30 is coupled to the plurality of shunting devices 20;
the non-display area B includes a display driving chip IC coupled to the plurality of driving control circuits 10, the display driving chip IC being configured to receive image data of an image to be displayed; when the display panel displays the image to be displayed and the current light intensity of the display panel needs to be changed, at least one control current I is input to the corresponding shunt device 20 through at least one input device 30, and the shunt device 20 adjusts the working current flowing through the light emitting device L.
In the embodiment of the present invention, the display area a may be used to display an image, and the non-display area B may be used to set signal traces connected to the display panel. Illustratively, the shape of the display area a is approximately rectangular, for example, if the corners of the display area a are all right angles, the display area a is rectangular. For another example, if the top corner of the display area a is an arc-shaped corner, the shape of the display area a is approximately rectangular.
In the embodiment of the present invention, the display area a includes a plurality of light emitting devices L and a plurality of driving control circuits 10, where the light emitting devices L may be OLEDs, and in a specific implementation process, each light emitting device L is coupled to one driving control circuit 10, and the light emitting device L emits light under the control of the corresponding driving control circuit 10. The driving control circuit 10 may be a circuit including a 2T1C pixel structure, and the driving control circuit 10 may also be a circuit including a 7T1C pixel structure, and of course, a person skilled in the art may set a specific circuit structure of the driving control circuit 10 according to actual needs, which is not limited herein.
In the embodiment of the present invention, the display area a includes a plurality of shunting devices 20 and at least one input device 30, and each light emitting device L is connected in parallel to one shunting device 20, so that the shunting devices 20 can shunt the current flowing through the corresponding light emitting device L, thereby adjusting the light emitting brightness of the light emitting device L. In addition, at least one input device 30 is coupled to the plurality of shunting devices 20, wherein the at least one input device 30 may be one or a plurality of. In the display panel shown in fig. 3, there is one at least one input device 30, and the light emitting devices L share the same input device 30. The direction indicated by the arrow in fig. 3 indicates the direction of the control current I.
In addition, in the specific implementation process, each shunt device 20 and the input device 30 coupled thereto form a current mirror structure, the magnitude of the control current I output from each shunt device 20 is the same as the magnitude of the control current I input to the input device 30, and since the magnitude of the control current I directly affects the magnitude of the working current of the light emitting device L, the luminance of the light emitting device L is further affected, in this way, the luminance of the display panel can be rapidly adjusted by adjusting the magnitude of the control current I, so that the efficiency of adjusting the luminance of the display panel is ensured.
In the embodiment of the present invention, the non-display region B includes a display driving chip IC coupled to the plurality of driving control circuits 10, the display driving chip IC being configured to receive image data of an image to be displayed; the image data of the image to be displayed may be the image data input to the display driving chip IC from the central processing unit 300 of the motherboard via the video transmission line. When the display panel displays the image to be displayed and the current light intensity of the display panel needs to be changed, at least one control current I is input to the corresponding shunt device 20 through at least one input device 30, and the shunt device 20 adjusts the working current flowing through the corresponding light emitting device L. In practical applications, when it is determined that the current light intensity of the display panel needs to be changed, by generating at least one control current I and then inputting the at least one control current I to the corresponding shunt device 20 through the at least one input device 30, the more current shunted by the shunt device 20, the lower the light emitting intensity of the light emitting device L correspondingly.
In a specific implementation process, the current light intensity of the display panel needs to be changed, which may be a brightness adjustment option for a user to manually adjust the display panel according to a visual requirement, or may be brightness of the display panel automatically adjusted when the ambient light intensity changes, and is not limited herein. Once it is determined that the present light intensity of the display panel needs to be changed, at least one control current I is generated to adjust the operating currents of the plurality of light emitting devices L. For example, a control current I greater than a preset current value may be generated, and then the control current I is input to the corresponding shunt device 20 through an input device 30, so that the shunt device 20 will shunt the working current flowing through the light emitting device L corresponding to the shunt device 20 under the action of the control current I, thereby reducing the working current of the light emitting device L, since the luminance of the light emitting device L is often proportional to the working current, in this way, the luminance of the light emitting device L is reduced, thereby implementing the uniform adjustment of the luminance of the plurality of light emitting devices L through at least one input device 30 and the plurality of shunt devices 20, and thereby ensuring the luminance uniformity of the display panel. In addition, a control current I smaller than a preset current value may be generated, for example, the control current I is infinitely close to 0, after the control current I is input to the corresponding shunt device 20 through one input device 30, since the current shunted by the shunt device 20 is small, the working current flowing through the light emitting device L is correspondingly large, so that the luminance of the light emitting device L is improved, and the improvement of the luminance of the display panel is finally realized.
In a specific implementation process, a corresponding relationship between the control current and the brightness of the display panel may be set according to an actual application requirement, and the corresponding relationship between the control current and the brightness of the display panel may be in a linear inverse proportion relationship, for example, Luma ═ c/I, where Luma denotes the brightness value of the display panel, I denotes the magnitude of the control current, and c denotes a coefficient value. In addition, the brightness of the display panel can be adjusted when the display panel normally displays the image to be displayed, so that the display quality is considered while the brightness of the display panel is adjusted.
In the embodiment of the present invention, as shown in fig. 4, a schematic structural diagram of a display panel is shown, in fig. 4, Data _1, Data _2, … …, and Data _ m respectively represent m columns of Data lines in the display panel, and Gate _1, Gate _2, … …, and Gate _ n respectively represent n rows of scan lines in the display panel, where m and n are integers greater than 1. Specifically, the first gate of each input device 30 is coupled to the second gate of each shunting device 20, the first pole of each input device 30 is shorted to the first gate of the corresponding input device 30, the first pole of each shunting device 20 is coupled to the anode of the corresponding light emitting device L, the second pole of each shunting device 20 and the second pole of the input device 30 are both coupled to a first power supply terminal VSS, and the cathode of each light emitting device L is coupled to the first power supply terminal VSS.
In the embodiment of the present invention, each input device 30 and each shunt device 20 may be a Thin Film Transistor (TFT), or a Metal Oxide Semiconductor Field-Effect Transistor (MOSFET), which is not limited herein.
In the embodiment of the present invention, the first pole and the second pole of each input device 30 may have different functions according to the type of the transistor and the signal at the signal end, for example, the first pole may be a source, and correspondingly, the second pole may be a drain, and the other one may be a first pole, a drain, and a second pole may be a source, as shown in fig. 3 and 4, the first pole and the second pole of each input device 30 may be a drain and a source.
In the embodiment of the present invention, the first pole and the second pole of each shunting device 20 may also have different functions according to the type of the transistor and the signal at the signal end, for example, the first pole may be a source, and correspondingly, the second pole may be a drain, and the other one may be a first drain and a second source, as shown in fig. 3 and 4, the first pole and the second pole of each shunting device 20 may be a drain and a source.
In the embodiment of the invention, the voltage of the first power source terminal VSS may be a high potential voltage.
In the embodiment of the present invention, the display area a includes a plurality of display areas, each of which is provided with one input device 30, and the respective light emitting devices L within each of the display areas share the same input device 30. As shown in fig. 5, the display area of the display panel includes one of two display areas, where the two display areas are a and b, the input device 30 corresponding to the display area a is disposed at the lower right corner of the corresponding display area a, and the input device 30 corresponding to the display area b is disposed at the lower right corner of the corresponding display area b. In addition, the input device 30 may be disposed at other positions in the corresponding display area according to actual needs, and is not limited herein. Since each display area is provided with one input device 30, the difference between the control of the control current I input to the input device 30 on the light emitting device L connected in parallel with the shunt device 20 at the far end of the display panel and the control of the light emitting device L connected in parallel with the shunt device 20 at the near end of the display panel is reduced, the display uniformity of the display panel is ensured, and the display quality of the display panel is improved.
In addition, in the implementation process, in order to ensure the display uniformity of the display area a, the display area a may be divided into a corresponding number of display areas according to the actual requirement for the display quality, and then the input device 30 of the corresponding area is respectively disposed for each display area. In addition, no matter how many display regions are, the magnitude of the control current I input to the input device 30 of each display region is the same value, so that the brightness of each display region in the display region a is uniformly adjusted, and the display quality of the display panel is ensured.
In the embodiment of the present invention, the plurality of light emitting devices L includes light emitting devices L of at least two colors, and the light emitting devices L of the same color share the same input device 30. For example, the plurality of light emitting devices L includes a red light emitting device R, a green light emitting device G, and a blue light emitting device B, which is not limited herein. Fig. 6 is a schematic diagram showing a structure in which all the red light emitting devices R share the same input device 30, all the green light emitting devices G share the same input device 30, and all the blue light emitting devices B share the same input device 30, where I _ R represents a control current input to the input device 30 of the red light emitting device R, I _ G represents a control current input to the input device 30 of the green light emitting device G, I _ B represents a control current input to the input device 30 of the blue light emitting device B, Data _ R represents a Data line in a column in which the red light emitting device R is located, Data _ G represents a Data line in a column in which the green light emitting device G is located, and Data _ B represents a Data line in a column in which the blue light emitting device B is located. In the specific implementation process, because the light emitting devices of different colors have different service lives, different light emitting efficiencies and the like, the control of the working currents of the light emitting devices of different colors is realized by adopting different input devices 30, and different control currents can be input to the input devices 30 of the light emitting devices of different colors to realize different adjustments of the light emitting brightness of the light emitting devices L of different colors, so that the targeted adjustment of the light emitting devices L of different colors is realized, and the display quality of the display panel is further ensured.
In the embodiment of the present invention, the input device 30 is disposed in the area range where the light emitting device L located in the middle area of the display area a is located, as shown in fig. 7, the input device 30 is one of the structural schematic diagrams that all the light emitting devices L share the same input device 30, and the input device 30 is disposed in the area range where the light emitting device L located in the middle area of the display area a is located, where Gate _ j represents a j-th row of scanning line, Data _ k represents a k-th column of Data line, j is an integer greater than 1 and smaller than m, and k is an integer greater than 1 and smaller than m. Because the input device 30 is disposed in the area range where the light emitting device L is located in the middle area of the display panel, in this way, the control conditions of the control current I input to the input device 30 to the far end and the near end of the display panel are not greatly different, thereby ensuring the display uniformity of the display panel.
In the embodiment of the present invention, each of the input devices 30 is disposed within a region corresponding to the light emitting device L in the middle region of the display region. When the display area a is divided into a plurality of display areas, the input device 30 disposed in each display area may be correspondingly disposed in the area range of the light emitting device L in the middle area of the display area, so as to ensure the brightness of each display area to be respectively adjusted, ensure the display uniformity of each display area, and further improve the display quality of the display panel.
In addition, in practical applications, besides the above-mentioned setting condition of the input devices 30 in the display panel, the number of the input devices 30 and the positions of the input devices 30 can be set according to the actual requirements of the user, which is not described herein again.
In the embodiment of the present invention, as shown in fig. 8, a schematic diagram of one of the structures of the display panel is shown, wherein the driving control circuit 10 in the display panel is a circuit formed by a 2T1C pixel structure. Specifically, each of the drive control circuits 10 includes a first switching transistor 101, a second switching transistor 102, and a capacitor C, wherein a third Gate of the first switching transistor 101 is coupled to the scan signal terminal Gate, a first pole of the first switching transistor 101 is coupled to a fourth Gate of the second switching transistor 102, a second pole of the first switching transistor 101 is coupled to the Data signal terminal Data, a first pole of the second switching transistor 102 is coupled to the second power supply terminal VDD, a second pole of the second switching transistor 102 is coupled to an anode of the corresponding light emitting device L, a first terminal of the capacitor C is coupled to the second power supply terminal VDD, and a second terminal of the capacitor C is coupled to the fourth Gate of the second switching transistor 102. Fig. 8 is a schematic structural diagram of one structure in which, when the driving control circuit 10 is a circuit formed by 2T1C pixel structures, all the light emitting devices L share the same input device 30, and the input device 30 is disposed at the lower right corner of the display area a. Accordingly, when the driving control circuit 10 is a circuit configured by a 2T1C pixel structure, as shown in fig. 9, all the red light emitting devices R share one input device 30, all the green light emitting devices G share one input device 30 and all the blue light emitting devices B share one input device 30, and the light emitting devices L of different colors use one of the different input devices 30. As shown in fig. 10, all the light emitting devices L share the same input device 30, and the input device 30 is disposed in the middle area of the display area a within the area where the light emitting devices L are located.
In the embodiment of the present invention, the second power terminal VDD may be a low potential voltage, and the second power terminal VDD may also be ground. The scan signal terminal Gate may be coupled to the Gate driving circuit GOA, or may be coupled to the Gate driving chip Gate IC, which is not limited herein. The display driving chip IC can input the Data signal to the corresponding Data signal terminal Data, thereby implementing the display function of the display panel.
Based on the same inventive concept, as shown in fig. 11, the embodiment of the present invention further provides a schematic structural diagram of a display device, specifically, the display device includes the display panel 100 as described above, a dimming circuit 200 coupled to at least one input device 30, and a cpu 300 coupled to the dimming circuit 200; wherein the content of the first and second substances,
the central processing unit 300 is configured to send the image data of the image to be displayed to the display driving chip IC, and send at least one dimming instruction to the dimming circuit 200 when it is determined that the current light intensity of the display panel 100 needs to be changed;
the dimming circuit 200 is configured to generate the at least one control current I corresponding to the at least one dimming command and input the at least one control current I to the at least one input device 30;
at least one input device 30 for inputting the at least one control current I to the plurality of shunting devices 20;
the plurality of shunt devices 20 are used for adjusting the operating current flowing through the plurality of light emitting devices L.
In the implementation, fig. 11 only illustrates one configuration of the driving control circuit 10 in the case of 2TIC, and in the implementation, driving control circuits with other configurations may be used.
In the embodiment of the present invention, the central processing unit 300 may send image data of an image to be displayed to the display driving chip IC through a video transmission bus (MiPi DSI), the central processing unit 300 is connected to the dimming circuit 200 through a Single Wire (Single Wire), and the central processing unit 300 may send at least one dimming instruction to the dimming circuit 200 when determining that the current light intensity of the display panel 100 needs to be changed, for example, the at least one dimming instruction may be an instruction to increase the brightness or an instruction to decrease the brightness.
In the embodiment of the present invention, the dimming circuit 200 is configured to generate at least one control current I corresponding to at least one dimming command, and input the at least one control current I to the at least one input device 30, and then the at least one input device 30 inputs the at least one control current I to the plurality of shunting devices 20, and the plurality of shunting devices 20 adjust the operating current flowing through the corresponding plurality of light emitting devices L. In an implementation, when the at least one dimming command is a command for increasing brightness, the dimming circuit 200 receives a current value with a higher value, converts the current value into a corresponding control current I, and then inputs the control current I to the at least one input device 30. When the at least one dimming command is a command to decrease the brightness, the dimming circuit 200 receives a current value with a lower value, converts the current value into a corresponding control current I, and then inputs the control current I to the at least one input device 30. Then, the control current I is input to each shunt device 20, thereby adjusting the operating current of the light emitting device L. Since the central processing unit 300 only needs to send the corresponding dimming command to the dimming circuit 200 during the whole brightness adjustment process, the dimming circuit 200 can be used in combination with the at least one input device 30 and the plurality of shunting devices 20 to adjust the brightness of the display panel 100, thereby reducing the processing load of the central processing unit 300 and realizing the brightness adjustment efficiency of the display panel 100.
In addition, in the process of brightness adjustment, the central processing unit 300 sends the image data of the image to be displayed to the display driving chip IC, so that the display quality is considered while the brightness is adjusted.
In the embodiment of the invention, the dimming circuit 200 is located in the non-display area B. The dimming circuit 200 may be disposed together with the display driving chip IC, and the dimming circuit 200 may also be disposed on the motherboard together with the central processing unit 300, thereby implementing a narrow frame design of the display panel 100.
In a specific implementation process, the display device provided by the embodiment of the present invention may be a mobile phone, and certainly, the display device provided by the embodiment of the present invention may also be any product or component having a display function, such as a tablet computer, a television, a display, a notebook computer, a digital photo frame, and a navigator. Other essential components of the display device are understood by those skilled in the art, and are not described herein nor should they be construed as limiting the present invention.
Since the principle of the display device to solve the problem is similar to that of the display panel 100, the display device can be implemented by referring to the implementation of the display panel 100, and repeated descriptions are omitted.
Based on the same inventive concept, as shown in fig. 12, an embodiment of the present invention provides a method for adjusting brightness of a display panel, including:
s101: when the display panel displays the image to be displayed and the current light intensity of the display panel is determined to need to be changed, the at least one control current is input to the corresponding shunt device through the at least one input device;
s102: and under the action of the at least one control current on the shunt device, changing the working current of the light-emitting device connected with the shunt device in parallel.
In the specific implementation process, the specific implementation process from step S101 to step S102 is as follows:
first, when it is determined that the present light intensity of the display panel needs to be changed while the display panel displays an image to be displayed, at least one control current I is input to the corresponding shunt device 20 through at least one input device 30. Wherein, if the current light intensity of the display panel is increased, the current control current I is increased. If the present light intensity of the display panel is reduced, the present control current I is reduced. Then, under the action of the at least one control current I on the current divider 20, the operating current of the light emitting device L associated with the current divider 20 is changed, thereby realizing the brightness adjustment of the light emitting device L and further realizing the brightness adjustment of the display panel. Since the principle of the method for adjusting the brightness of the display panel 100 to solve the problem is similar to that of the display panel 100, the implementation of the method for adjusting the brightness can be referred to the implementation of the display panel 100, and repeated descriptions are omitted.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A display panel, comprising:
a display area and a non-display area surrounding the display area;
the display area comprises a plurality of light emitting devices, a plurality of driving control circuits, a plurality of shunt devices and at least one input device, wherein each light emitting device is coupled with one driving control circuit, each light emitting device is connected with one shunt device in parallel, and the at least one input device is coupled with the shunt devices;
the non-display area comprises a display driving chip coupled with the plurality of driving control circuits, and the display driving chip is used for receiving image data of an image to be displayed; when the display panel displays the image to be displayed and the current light intensity of the display panel needs to be changed, at least one control current is input to the corresponding shunt device through the at least one input device, and the shunt device adjusts the working current flowing through the light-emitting device.
2. The display panel of claim 1, wherein a first gate of each of the input devices is coupled to a second gate of each of the shunting devices, a first pole of each of the input devices is shorted to the first gate of the corresponding input device, the first pole of each of the shunting devices is coupled to an anode of the corresponding light emitting device, the second pole of each of the shunting devices and the second pole of the corresponding input device are both coupled to a first power supply terminal, and a cathode of each of the light emitting devices is coupled to the first power supply terminal.
3. The display panel according to claim 1, wherein the display region includes a plurality of display regions, each of the display regions is provided with one of the input devices, and the respective light emitting devices in each of the display regions share the same one of the input devices.
4. The display panel according to claim 1, wherein the plurality of light emitting devices include at least two colors of the light emitting devices, and the light emitting devices of the same color share the same input device.
5. The display panel according to claim 1, wherein the input device is disposed in a region where the light emitting device is located in a middle region of the display area.
6. The display panel according to claim 3, wherein each of the input devices is disposed within a region corresponding to a middle region of the display region where the light emitting device is located.
7. The display panel of claim 1, wherein each of the driving control circuits includes a first switching transistor, a second switching transistor, and a capacitor, wherein a third gate of the first switching transistor is coupled to a scan signal terminal, a first pole of the first switching transistor is coupled to a fourth gate of the second switching transistor, a second pole of the first switching transistor is coupled to a data signal terminal, a first pole of the second switching transistor is coupled to a second power supply terminal, a second pole of the second switching transistor is coupled to an anode of the corresponding light emitting device, a first terminal of the capacitor is coupled to the second power supply terminal, and a second terminal of the capacitor is coupled to a fourth gate of the second switching transistor.
8. A display device, comprising:
the display panel of any one of claims 1-7;
a dimming circuit coupled to the at least one input device;
a central processing unit coupled to the dimming circuit; wherein the content of the first and second substances,
the central processing unit is used for sending the image data of the image to be displayed to the display driving chip and sending at least one dimming instruction to the dimming circuit when the current light intensity of the display panel is determined to be required to be changed;
the dimming circuit is used for generating at least one control current corresponding to the at least one dimming command and inputting the at least one control current to the at least one input device;
the at least one input device is used for inputting the at least one control current to the plurality of shunt devices;
the plurality of shunt devices are used for adjusting the working current flowing through the plurality of light-emitting devices.
9. The display device according to claim 8, wherein the dimming circuit is located in the non-display region.
10. A method for adjusting luminance of a display panel according to any one of claims 1 to 7, comprising:
when the display panel displays the image to be displayed and the current light intensity of the display panel is determined to need to be changed, the at least one control current is input to the corresponding shunt device through the at least one input device;
and under the action of the at least one control current on the shunt device, changing the working current of the light-emitting device connected with the shunt device in parallel.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113012632A (en) * | 2021-02-25 | 2021-06-22 | Oppo广东移动通信有限公司 | Screen brightness adjusting method and device, storage medium and electronic equipment |
| WO2022247467A1 (en) * | 2021-05-28 | 2022-12-01 | Oppo广东移动通信有限公司 | Display panel and display device |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101276542A (en) * | 2007-03-28 | 2008-10-01 | 中国科学院微电子研究所 | Drive circuit for organic LED pixels |
| CN101794551A (en) * | 2010-02-04 | 2010-08-04 | 友达光电股份有限公司 | Method for improving image brightness in OLED display panel |
| WO2011005314A2 (en) * | 2009-07-06 | 2011-01-13 | Rodriquez Edward T | Cooling solid state high-brightness white-light illumination sources |
| EP2224488B1 (en) * | 2004-07-29 | 2011-11-02 | Sony Corporation | Solid-state imaging device, production method and drive method thereof, and camera |
| CN103260313A (en) * | 2013-05-23 | 2013-08-21 | 中山市德源照明电器有限公司 | Shunting-type LED dimming drive system and method thereof |
| CN206601944U (en) * | 2017-02-07 | 2017-10-31 | 深圳市联建光电股份有限公司 | A kind of low-light level high gray circuit for LED display |
| CN109285508A (en) * | 2018-11-27 | 2019-01-29 | 合肥惠科金扬科技有限公司 | A kind of driving method of display device, drive system and display device |
| CN109348067A (en) * | 2018-11-30 | 2019-02-15 | 努比亚技术有限公司 | A kind of method, mobile terminal and computer readable storage medium adjusting screen display brightness |
| CN109688353A (en) * | 2019-01-08 | 2019-04-26 | 京东方科技集团股份有限公司 | Optical detecting unit, imaging sensor, electronic equipment and detection method |
| CN110689855A (en) * | 2018-07-06 | 2020-01-14 | 鸿富锦精密工业（深圳）有限公司 | Display brightness adjusting method and device of display device and display device |
| CN110969990A (en) * | 2018-09-28 | 2020-04-07 | 乐金显示有限公司 | Current sensing device and organic light emitting display device including the same |
| CN111462680A (en) * | 2020-04-22 | 2020-07-28 | 昆山国显光电有限公司 | Pixel circuit, driving method thereof, display panel and display device |
| CN111554198A (en) * | 2019-02-08 | 2020-08-18 | 三星显示有限公司 | Display device |
-
2020
- 2020-09-11 CN CN202010950915.4A patent/CN112017596A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2224488B1 (en) * | 2004-07-29 | 2011-11-02 | Sony Corporation | Solid-state imaging device, production method and drive method thereof, and camera |
| CN101276542A (en) * | 2007-03-28 | 2008-10-01 | 中国科学院微电子研究所 | Drive circuit for organic LED pixels |
| WO2011005314A2 (en) * | 2009-07-06 | 2011-01-13 | Rodriquez Edward T | Cooling solid state high-brightness white-light illumination sources |
| CN101794551A (en) * | 2010-02-04 | 2010-08-04 | 友达光电股份有限公司 | Method for improving image brightness in OLED display panel |
| CN103260313A (en) * | 2013-05-23 | 2013-08-21 | 中山市德源照明电器有限公司 | Shunting-type LED dimming drive system and method thereof |
| CN206601944U (en) * | 2017-02-07 | 2017-10-31 | 深圳市联建光电股份有限公司 | A kind of low-light level high gray circuit for LED display |
| CN110689855A (en) * | 2018-07-06 | 2020-01-14 | 鸿富锦精密工业（深圳）有限公司 | Display brightness adjusting method and device of display device and display device |
| CN110969990A (en) * | 2018-09-28 | 2020-04-07 | 乐金显示有限公司 | Current sensing device and organic light emitting display device including the same |
| CN109285508A (en) * | 2018-11-27 | 2019-01-29 | 合肥惠科金扬科技有限公司 | A kind of driving method of display device, drive system and display device |
| CN109348067A (en) * | 2018-11-30 | 2019-02-15 | 努比亚技术有限公司 | A kind of method, mobile terminal and computer readable storage medium adjusting screen display brightness |
| CN109688353A (en) * | 2019-01-08 | 2019-04-26 | 京东方科技集团股份有限公司 | Optical detecting unit, imaging sensor, electronic equipment and detection method |
| CN111554198A (en) * | 2019-02-08 | 2020-08-18 | 三星显示有限公司 | Display device |
| CN111462680A (en) * | 2020-04-22 | 2020-07-28 | 昆山国显光电有限公司 | Pixel circuit, driving method thereof, display panel and display device |
Non-Patent Citations (1)
| Title |
|---|
| 赵坚勇: "《有机发光二极管（OLED）显示技术》", 31 July 2012, 国防工业出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113012632A (en) * | 2021-02-25 | 2021-06-22 | Oppo广东移动通信有限公司 | Screen brightness adjusting method and device, storage medium and electronic equipment |
| CN113012632B (en) * | 2021-02-25 | 2022-04-26 | Oppo广东移动通信有限公司 | Screen brightness adjusting method and device, storage medium and electronic equipment |
| WO2022247467A1 (en) * | 2021-05-28 | 2022-12-01 | Oppo广东移动通信有限公司 | Display panel and display device |
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