CN114333680A - Display panel and power supply method and device thereof - Google Patents
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Abstract
The invention provides a display panel and a power supply method and device thereof, wherein the power supply method and device comprise the following steps: IC chip, many power supply lines; the IC chip is connected with the plurality of power supply lines; each of the plurality of power supply lines includes a comparator; the comparator is used for comparing the driving voltage variation of each power supply line in the plurality of power supply lines with the upper power supply line of each power supply line; the IC chip is used for acquiring the driving voltage variation transmitted by the comparators; determining the variable quantity of a gray scale interval corresponding to the current power supply line to be supplied according to the variable quantity of the driving voltage; determining the target bias current of the current power supply line to be supplied according to the variable quantity of the gray scale interval; and controlling to output a driving current corresponding to the target bias current to the current power supply line to be supplied. The display panel judges the target bias current in the current power supply line through the comparator in the power supply circuit, so that the power consumption of the display panel during power supply is reduced.
Description
Technical Field
The invention relates to the technical field of display panels, in particular to a display panel and a power supply method and device thereof.
Background
When the display panel supplies power to the power supply line and the sub-pixels connected to the power supply line by adopting the IC chip, the brightness required to be displayed by different power supply lines can be different, and the existing power supply mode is that no matter whether the brightness required to be displayed by different power supply lines is different, the IC chip can be output according to the same bias current, so that the requirement for high brightness can be met, the bias current with the highest brightness is generally adopted for output, and therefore, the situation of higher power consumption exists when the power supply of the display panel is carried out by adopting the mode.
Disclosure of Invention
In view of the above, the present invention provides a display panel, and a power supply method and device thereof, so as to reduce power consumption when supplying power to the display panel.
In a first aspect, an embodiment of the present invention provides a display panel, including: IC chip, many power supply lines; the IC chip is connected with the plurality of power supply lines; each of the plurality of power supply lines includes a comparator; the comparator is used for comparing the driving voltage variation of each power supply line in the plurality of power supply lines with the upper power supply line of each power supply line; the IC chip is preset with a plurality of gray scale intervals, and the corresponding brightness values of different gray scale intervals are different; the IC chip is used for sequentially outputting bias current to a plurality of power supply lines so as to supply power to the power supply lines; the IC chip is also used for acquiring the driving voltage variable quantity transmitted by the comparators; determining the variable quantity of a gray scale interval corresponding to the current power supply line to be supplied according to the variable quantity of the driving voltage; determining the target bias current of the current power supply line to be supplied according to the variable quantity of the gray scale interval; and controlling to output a driving current corresponding to the target bias current to the current power supply line to be supplied.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where the method further includes: an amplifier; the IC chip is connected with the plurality of power supply lines through the amplifier; the IC chip outputs a driving current corresponding to the target bias current to the current power supply line through the amplifier.
With reference to the first possible implementation manner of the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, where the method further includes: a plurality of sub-pixels; each power supply line in the plurality of power supply lines is connected with a plurality of sub-pixels with preset number; the IC chip outputs bias current to a plurality of power supply lines in sequence through an amplifier so as to charge sub-pixels connected to the power supply lines.
In a second aspect, an embodiment of the present invention provides a display panel power supply method, which is applied to the display panel described in any one of the first aspect to the second possible implementation manner of the first aspect, and the method includes: obtaining the driving voltage variation output by the plurality of comparators; determining the variable quantity of a gray scale interval of a current power supply line to be compared with a previous power supply line to be corresponding to the current power supply line to be compared according to the variable quantity of the driving voltage; determining the target bias current of the current power supply line to be supplied according to the variable quantity of the gray scale interval; and controlling to output a driving current corresponding to the target bias current to the current power supply line to be supplied.
With reference to the second aspect, an embodiment of the present invention provides a first possible implementation manner of the second aspect, wherein the step of obtaining the driving voltage variation of the outputs of the plurality of comparators includes: acquiring the brightness of sub-pixel points of a plurality of power supply lines and the brightness of sub-pixel points of a superior power supply line of the plurality of power supply lines; and determining the variable quantity of the driving voltage output by the comparators according to the brightness of the sub-pixel points of the power supply lines and the brightness of the sub-pixel points of the upper-level power supply lines of the power supply lines.
With reference to the second aspect, an embodiment of the present invention provides a second possible implementation manner of the second aspect, wherein the IC chip pre-stores a preset interval of the driving voltage variation; the step of determining the variable quantity of the gray scale interval of the current power supply line to be compared with the upper-level power supply line to be corresponding to the current power supply line to be detected according to the variable quantity of the driving voltage comprises the following steps: searching the stage number of the preset interval corresponding to the driving voltage variation; and determining the variable quantity of the gray scale interval of the current power supply line to be compared with the upper power supply line to be compared corresponding to the current power supply line to be compared according to the level.
With reference to the second possible implementation manner of the second aspect, an embodiment of the present invention provides a third possible implementation manner of the second aspect, wherein the IC chip pre-stores a first mapping table of variation amounts of gray scale intervals and corresponding target bias currents; the step of determining the target bias current according to the variation of the gray scale interval comprises the following steps: and searching the first mapping relation table according to the variable quantity of the gray scale interval, and determining the corresponding target bias current.
With reference to the third possible implementation manner of the second aspect, the embodiment of the present invention provides a fourth possible implementation manner of the second aspect, wherein the step of determining the target bias current of the current power supply line to be supplied according to the variation of the gray-scale interval includes: determining the adjustment amount of the gray scale interval corresponding to the target bias current of the current power supply line to be supplied according to the variable quantity of the gray scale interval; and determining the target bias current according to the adjustment amount of the target bias current.
With reference to the fourth possible implementation manner of the second aspect, an embodiment of the present invention provides a fifth possible implementation manner of the second aspect, where the IC chip pre-stores a second mapping table between an adjustment amount of the bias current and the corresponding target bias current; the step of determining the target bias current according to the adjustment amount of the target bias current includes: and searching the second mapping relation table according to the variable quantity of the target bias current to obtain the corresponding target bias current.
In a third aspect, an embodiment of the present invention provides a display panel power supply apparatus, including: the driving voltage variation obtaining module is used for obtaining the driving voltage variations output by the comparators; the gray scale interval determining module is used for determining the variable quantity of a gray scale interval of the current power supply line to be compared with a higher-level power supply line corresponding to the current power supply line to be compared according to the variable quantity of the driving voltage; the bias current determining module is used for determining the target bias current of the current power supply line to be supplied according to the variable quantity of the gray scale interval; and the control output module is used for controlling and outputting the driving current corresponding to the target bias current to the current power supply line to be supplied.
The embodiment of the invention has the following beneficial effects:
the display panel and the power supply method and device thereof provided by the embodiment of the invention comprise the following steps: IC chip, many power supply lines; the IC chip is connected with the plurality of power supply lines; each of the plurality of power supply lines includes a comparator; the comparator is used for comparing the driving voltage variation of each power supply line in the plurality of power supply lines with the upper power supply line of each power supply line; the IC chip is preset with a plurality of gray scale intervals, and the corresponding brightness values of different gray scale intervals are different; the IC chip is used for sequentially outputting bias current to a plurality of power supply lines so as to supply power to the power supply lines; the IC chip is also used for acquiring the driving voltage variable quantity transmitted by the comparators; determining the variable quantity of a gray scale interval corresponding to the current power supply line to be supplied according to the variable quantity of the driving voltage; determining the target bias current of the current power supply line to be supplied according to the variable quantity of the gray scale interval; and controlling to output a driving current corresponding to the target bias current to the current power supply line to be supplied. The display panel judges the target bias current in the current power supply line through the comparator in the power supply circuit, so that the power consumption of the display panel during power supply is reduced.
Additional features and advantages of the disclosure will be set forth in the description which follows, or in part may be learned by the practice of the above-described techniques of the disclosure, or may be learned by practice of the disclosure.
In order to make the aforementioned objects, features and advantages of the present disclosure more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic flow chart illustrating a power supply method for a display panel according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating a relationship between a gray scale interval and a power supply amount according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating a relationship between a gray scale interval and a power supply amount according to another embodiment of the present invention;
fig. 5 is a schematic structural diagram of a power supply device for a display panel according to an embodiment of the present invention.
Icon: 11-an IC chip; 12-a plurality of power supply lines; 51-a driving voltage variation obtaining module; 52-gray scale interval determination module; 53-bias current determination module; 54-control output module.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
At present, when the display panel supplies power to a power supply line and sub-pixels connected to the power supply line by using an IC chip, the luminance required to be displayed by different power supply lines may be different, and the existing power supply mode is that no matter whether the luminance required to be displayed by different power supply lines is different, the IC chip may output according to the same bias current, so as to meet the requirement for high luminance, the bias current with the highest luminance is generally adopted for output, and therefore, the above mode is adopted to supply power to the display panel, and the situation of higher power consumption exists.
Accordingly, embodiments of the present invention provide a display panel, and a power supply method and apparatus thereof, which can alleviate the above technical problems and effectively reduce power consumption when supplying power to the display panel. To facilitate understanding of the present embodiment, a detailed description will be given of a display panel disclosed in the present embodiment.
Example 1
As shown in fig. 1, a schematic view of a display panel structure provided in an embodiment of the present invention includes: an IC chip 11, a plurality of power supply lines 12; the IC chip 11 is connected to the plurality of power supply lines 12; each of the plurality of power supply lines 12 includes a comparator; the comparator is used for comparing the driving voltage variation of each power supply line in the plurality of power supply lines with the upper power supply line of each power supply line; the IC chip 11 is preset with a plurality of gray scale intervals, and the brightness values corresponding to different gray scale intervals are different; the IC chip 11 is configured to sequentially output bias currents to a plurality of power supply lines to supply power to the power supply lines; the IC chip 11 is further configured to obtain the driving voltage variation transmitted by the plurality of comparators; determining the variable quantity of a gray scale interval corresponding to the current power supply line to be supplied according to the variable quantity of the driving voltage; determining the target bias current of the current power supply line to be supplied according to the variable quantity of the gray scale interval; and controlling to output a driving current corresponding to the target bias current to the current power supply line to be supplied. The display panel judges the target bias current in the current power supply line through the comparator in the power supply circuit, so that the power consumption of the display panel during power supply is reduced.
In one embodiment, the display panel further includes: an amplifier; the IC chip 11 is connected with the plurality of power supply lines through the amplifier; the IC chip 11 outputs a driving current corresponding to the target bias current to the current power supply line through the amplifier.
In another embodiment, the display panel further includes: a plurality of sub-pixels; each power supply line in the plurality of power supply lines is connected with a plurality of sub-pixels with preset number; the IC chip outputs bias current to a plurality of power supply lines in sequence through an amplifier so as to charge sub-pixels connected to the power supply lines.
The display panel provided by the embodiment of the invention comprises: IC chip, many power supply lines; the IC chip is connected with the plurality of power supply lines; each of the plurality of power supply lines includes a comparator; the comparator is used for comparing the driving voltage variation of each power supply line in the plurality of power supply lines with the upper power supply line of each power supply line; the IC chip is preset with a plurality of gray scale intervals, and the corresponding brightness values of different gray scale intervals are different; the IC chip is used for sequentially outputting bias current to a plurality of power supply lines so as to supply power to the power supply lines; the IC chip is also used for acquiring the driving voltage variable quantity transmitted by the comparators; determining the variable quantity of a gray scale interval corresponding to the current power supply line to be supplied according to the variable quantity of the driving voltage; determining the target bias current of the current power supply line to be supplied according to the variable quantity of the gray scale interval; and controlling to output a driving current corresponding to the target bias current to the current power supply line to be supplied. The display panel judges the target bias current in the current power supply line through the comparator in the power supply circuit, so that the power consumption of the display panel during power supply is reduced.
Example 2
On the basis of the method shown in fig. 1, the present invention also provides a power supply method for a display panel, which is applied to the display panel in embodiment 1.
As shown in fig. 2, fig. 2 is a schematic flow chart of a power supply method for a display panel according to an embodiment of the present invention.
In step S201, the driving voltage variation output by a plurality of comparators is obtained.
In actual operation, wherein obtaining the driving voltage variation amounts of the plurality of comparator outputs comprises the following steps a1-a 2:
step A1: the brightness of the sub-pixel points of the power supply lines and the brightness of the sub-pixel points of the upper-level power supply lines of the power supply lines are obtained.
Step A2: and determining the variable quantity of the driving voltage output by the comparators according to the brightness of the sub-pixel points of the power supply lines and the brightness of the sub-pixel points of the upper-level power supply lines of the power supply lines.
Step S202, according to the driving voltage variable quantity, determining the variable quantity of the gray scale interval of the current power supply line to be compared with the upper-level power supply line to be corresponding to the current power supply line to be detected.
In actual operation, the IC chip pre-stores a preset interval of the driving voltage variation. The step S202 specifically includes the following steps B1-B2:
step B1: and searching the stage number of the preset interval corresponding to the driving voltage variation.
Step B2: and determining the variable quantity of the gray scale interval of the current power supply line to be compared with the upper power supply line to be compared corresponding to the current power supply line to be compared according to the level.
Step S203, determining the target bias current of the current power supply line to be supplied according to the variable quantity of the gray scale interval.
In this embodiment, the IC chip pre-stores a first mapping table of the variation of the gray scale section and the corresponding target bias current. The step S203 specifically includes: and searching the first mapping relation table according to the variable quantity of the gray scale interval, and determining the corresponding target bias current.
Wherein the step of determining the target bias current of the current power supply line to be supplied according to the variation of the gray scale interval comprises C1-C2:
and step C1, determining the adjustment amount of the gray scale interval corresponding to the target bias current of the current power supply line to be supplied according to the variable quantity of the gray scale interval.
And step C2, determining the target bias current according to the adjustment amount of the target bias current.
Here, the IC chip prestores a second mapping table of the adjustment amount of the bias current and the corresponding target bias current. The step C2 specifically includes: and searching the second mapping relation table according to the variable quantity of the target bias current to obtain the corresponding target bias current.
For convenience of understanding, fig. 3 is a schematic diagram illustrating a corresponding relationship between a gray scale interval and a power supply amount according to an embodiment of the present invention; FIG. 4 is a diagram illustrating another gray scale interval and power supply amount mapping relationship according to an embodiment of the present invention.
And S204, controlling to output a driving current corresponding to the target bias current to the current power supply line to be supplied.
The power supply method for the display panel provided by the embodiment of the invention is applied to the display panel in the embodiment 1, and the method comprises the following steps: obtaining the driving voltage variation output by the plurality of comparators; determining the variable quantity of a gray scale interval of a current power supply line to be compared with a previous power supply line to be corresponding to the current power supply line to be compared according to the variable quantity of the driving voltage; determining the target bias current of the current power supply line to be supplied according to the variable quantity of the gray scale interval; and controlling to output a driving current corresponding to the target bias current to the current power supply line to be supplied. According to the power supply method of the display panel, the target bias current in the current power supply line is judged by obtaining the comparator in the power supply circuit, so that the power consumption of the display panel during power supply is reduced.
Example 3
An embodiment of the present invention further provides a display panel power supply apparatus, as shown in fig. 5, which is a schematic structural diagram of the display panel power supply apparatus provided in the embodiment of the present invention, and the display panel power supply apparatus includes:
a driving voltage variation obtaining module 51, configured to obtain the driving voltage variations output by the plurality of comparators.
The gray scale interval determining module 52 is configured to determine, according to the driving voltage variation, a variation of a gray scale interval of the current power supply line to be compared with a gray scale interval of a higher-level power supply line corresponding to the current power supply line to be detected.
And the bias current determining module 53 is configured to determine a target bias current of the current power supply line to be supplied according to the variation of the gray scale interval.
And a control output module 54, configured to control to output a driving current corresponding to the target bias current to the current power supply line.
The driving voltage variation obtaining module 51, the gray scale interval determining module 52, the bias current determining module 53 and the control output module 54 are connected in sequence.
In one possible implementation manner, the driving voltage variation obtaining module 51 is further configured to obtain the brightness of sub-pixel points of a plurality of power supply lines and the brightness of sub-pixel points of a higher-level power supply line of the plurality of power supply lines; and determining the variable quantity of the driving voltage output by the comparators according to the brightness of the sub-pixel points of the power supply lines and the brightness of the sub-pixel points of the upper-level power supply lines of the power supply lines.
In one possible embodiment, the gray scale interval determining module 52 is further configured to search a level of the preset interval corresponding to the driving voltage variation; and determining the variable quantity of the gray scale interval of the current power supply line to be compared with the upper power supply line to be compared corresponding to the current power supply line to be compared according to the level.
In one possible implementation, the bias current determining module 53 is further configured to look up the first mapping table according to the variation of the gray scale interval, and determine the corresponding target bias current.
In one possible implementation manner, the bias current determining module 53 is further configured to determine, according to the variation of the gray-scale interval, an adjustment amount of the gray-scale interval corresponding to the target bias current of the current power supply line to be supplied; and determining the target bias current according to the adjustment amount of the target bias current.
In one possible implementation manner, the bias current determining module 53 is further configured to search the second mapping table according to the variation of the target bias current to obtain the corresponding target bias current.
The display panel power supply device provided by the embodiment of the invention has the same technical characteristics as the display panel power supply method provided by the embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved. It is clear to those skilled in the art that, for convenience and brevity of description, the specific working process of the apparatus described above may refer to the corresponding process in the foregoing method embodiment, and is not described herein again.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Claims (10)
1. A display panel, comprising: IC chip, many power supply lines; the IC chip is connected with the plurality of power supply lines; each of the plurality of power supply lines comprises a comparator; the comparator is used for comparing the driving voltage variation of each power supply line in the plurality of power supply lines with the driving voltage variation of the upper power supply line of each power supply line; the IC chip is preset with a plurality of gray scale intervals, and the corresponding brightness values of different gray scale intervals are different;
the IC chip is used for sequentially outputting bias current to a plurality of power supply lines so as to supply power to the power supply lines;
the IC chip is further used for acquiring the driving voltage variation transmitted by the plurality of comparators; determining the variable quantity of a gray scale interval corresponding to the current power supply line to be supplied according to the variable quantity of the driving voltage; determining the target bias current of the current power supply line to be supplied according to the variable quantity of the gray scale interval; and controlling to output a driving current corresponding to the target bias current to the current power supply line to be supplied.
2. The display panel according to claim 1, further comprising: an amplifier; the IC chip is connected with the plurality of power supply lines through the amplifiers; and the IC chip outputs a driving current corresponding to the target bias current to the current power supply line to be supplied through the amplifier.
3. The display panel according to claim 2, further comprising: a plurality of sub-pixels; each power supply line in the plurality of power supply lines is connected with a plurality of sub-pixels with preset number; the IC chip outputs bias current to a plurality of power supply lines in sequence through the amplifier so as to charge the sub-pixels connected to the power supply lines.
4. A method for supplying power to a display panel, the method being applied to the display panel according to any one of claims 1 to 3, the method comprising:
acquiring the driving voltage variation quantity output by a plurality of comparators;
determining the variable quantity of a gray scale interval of a current power supply line to be compared with a previous power supply line to be compared with the current power supply line to be compared according to the variable quantity of the driving voltage;
determining the target bias current of the current power supply line to be supplied according to the variable quantity of the gray scale interval;
and controlling to output a driving current corresponding to the target bias current to the current power supply line to be supplied.
5. The method according to claim 4, wherein the step of obtaining the driving voltage variation of the plurality of comparator outputs comprises:
acquiring the brightness of sub-pixel points of a plurality of power supply lines and the brightness of sub-pixel points of a superior power supply line of the plurality of power supply lines;
and determining the variable quantity of the driving voltage output by the comparators according to the brightness of the sub-pixel points of the power supply lines and the brightness of the sub-pixel points of the upper-level power supply lines of the power supply lines.
6. The method according to claim 4, wherein the IC chip pre-stores a predetermined interval of driving voltage variation; the step of determining the variable quantity of the gray scale interval of the current power supply line to be compared with the gray scale interval of the upper-level power supply line to be corresponding to the current power supply line to be detected according to the variable quantity of the driving voltage comprises the following steps:
searching the stage number of the preset interval corresponding to the driving voltage variation;
and determining the variable quantity of the gray scale interval of the current power supply line to be compared with the gray scale interval of the upper-level power supply line to be corresponding to the current power supply line to be compared according to the level number.
7. The method according to claim 6, wherein the IC chip pre-stores a first mapping table of the variation of the gray scale interval and the corresponding target bias current; the step of determining the target bias current according to the variation of the gray scale interval comprises the following steps: and searching the first mapping relation table according to the variable quantity of the gray scale interval, and determining the corresponding target bias current.
8. The method according to claim 7, wherein the step of determining the target bias current of the current power supply line according to the variation of the gray-scale interval comprises:
determining the adjustment amount of the target bias current of the current power supply line to be supplied corresponding to the gray scale interval according to the variable quantity of the gray scale interval;
and determining the target bias current according to the adjustment amount of the target bias current.
9. The method according to claim 8, wherein the IC chip pre-stores a second mapping table of the adjustment amount of the bias current and the corresponding target bias current; the step of determining the target bias current according to the adjustment amount of the target bias current comprises:
and searching the second mapping relation table according to the variable quantity of the target bias current to obtain the corresponding target bias current.
10. A display panel power supply apparatus, comprising:
the driving voltage variation obtaining module is used for obtaining the driving voltage variations output by the comparators;
the gray scale interval determining module is used for determining the variable quantity of a gray scale interval of a current power supply line to be compared with a gray scale interval of a higher-level power supply line corresponding to the current power supply line to be detected according to the variable quantity of the driving voltage;
the bias current determining module is used for determining the target bias current of the current power supply line to be supplied according to the variable quantity of the gray scale interval;
and the control output module is used for controlling and outputting the driving current corresponding to the target bias current to the current power supply line to be supplied.
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| CN112133257A (en) * | 2020-09-27 | 2020-12-25 | 合肥京东方显示技术有限公司 | Compensation method and device of display panel |
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