CN110853578A - Voltage compensation method and device - Google Patents
Voltage compensation method and device Download PDFInfo
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- CN110853578A CN110853578A CN201911203489.1A CN201911203489A CN110853578A CN 110853578 A CN110853578 A CN 110853578A CN 201911203489 A CN201911203489 A CN 201911203489A CN 110853578 A CN110853578 A CN 110853578A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
Abstract
The invention provides a voltage compensation method and a voltage compensation device, wherein the method comprises the steps of receiving a brightness adjustment instruction; and in the process of changing the duty ratio of the PWM signal based on the brightness adjusting instruction to adjust the brightness of the display screen, controlling a data output unit to provide compensation voltage for a target pixel point, wherein the voltage value of the compensation voltage provided by the data output unit for the target pixel point in a PWM signal dimming period corresponds to the voltage value of the data voltage provided by the data output unit for the target pixel point at the starting time point of the dimming period, and the target pixel point is any pixel point in the display screen. The voltage compensation method and the voltage compensation device provided by the invention can improve the display effect in the process of adjusting the luminous brightness of the display screen.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a voltage compensation method and device.
Background
An Organic Light-Emitting Diode (OLED) is a device that uses a multi-layer Organic thin film structure to realize electroluminescence. Compared with related display screens, the OLED display screen has the characteristics of being lighter and thinner, high in brightness, low in power consumption, fast in response, high in definition, good in flexibility, high in luminous efficiency and the like, and can meet new requirements of consumers on display technologies.
Some OLED devices adjust the brightness of the display screen through a Pulse Width Modulation (PWM) technique, however, when adjusting the brightness (especially in the case of low brightness), PWM dimming may cause a brightness step, so that human eyes feel a phenomenon of screen flashing, and the display effect of dimming the display device is reduced.
Disclosure of Invention
The embodiment of the invention provides a voltage compensation method and a voltage compensation device, and aims to solve the problems that in the process of adjusting brightness of a display device in the related art, human eyes feel the phenomenon of screen flickering and the display effect of dimming of the display device is reduced.
In order to solve the above technical problems, the present invention provides the following technical solutions:
in a first aspect, an embodiment of the present invention provides a voltage compensation method, including:
receiving a brightness adjusting instruction;
and in the process of changing the duty ratio of the PWM signal based on the brightness adjusting instruction to adjust the brightness of the display screen, controlling a data output unit to provide compensation voltage for a target pixel point, wherein the voltage value of the compensation voltage provided by the data output unit for the target pixel point in a PWM signal dimming period corresponds to the voltage value of the data voltage provided by the data output unit for the target pixel point at the starting time point of the dimming period, and the target pixel point is any pixel point in the display screen.
Further, the step of controlling the data output unit to provide the corresponding compensation voltage for the target pixel point includes:
acquiring a voltage value of a data voltage provided by the data output unit to a target pixel point at an initial time point of a target dimming cycle through a voltage register, wherein the target dimming cycle is any dimming cycle in the process of controlling the brightness adjustment of the display screen by the PWM signal;
determining a voltage value of a compensation voltage corresponding to a voltage value of the data voltage;
and in the target dimming period, controlling the data output unit to provide a target voltage for a target pixel point, wherein the voltage value of the target voltage is equal to the sum of the voltage value of the data voltage and the voltage value of the compensation voltage.
Further, the determining of the voltage value of the compensation voltage corresponding to the voltage value of the data voltage includes:
obtaining a compensation parameter based on a voltage value of a data voltage provided by the data output unit to a target pixel point at an initial time point of a target dimming cycle;
and determining the voltage value of the compensation voltage corresponding to the voltage value of the data voltage in the mapping relation according to the compensation parameter and a preset mapping relation.
Further, after the step of controlling the data output unit to provide the compensation voltage for the target pixel point, the method further includes:
and after the Pulse Width Modulation (PWM) signal controls the brightness adjustment of the display screen based on the brightness adjustment instruction, controlling the data output unit to stop providing the compensation voltage for the target pixel point.
In a second aspect, an embodiment of the present invention further provides a voltage compensation apparatus, including:
the receiving module is used for receiving a brightness adjusting instruction;
and the control module is used for controlling the data output unit to provide compensation voltage for the target pixel point in the process of controlling the brightness adjustment of the display screen by the Pulse Width Modulation (PWM) signal based on the brightness adjustment instruction, the voltage value of the compensation voltage provided by the data output unit for the target pixel point in a PWM signal dimming cycle corresponds to the voltage value of the data voltage provided by the data output unit for the target pixel point at the starting time point of the dimming cycle, and the target pixel point is any pixel point in the display screen.
Further, the control module includes:
the acquisition submodule is used for acquiring a voltage value of a data voltage provided by the data output unit to a target pixel point at an initial time point of a target dimming cycle through a voltage register, wherein the target dimming cycle is any dimming cycle in the process of controlling the brightness of the display screen to be adjusted through a PWM signal;
a determination submodule for determining a voltage value of a compensation voltage corresponding to a voltage value of the data voltage;
and the control submodule is used for controlling the data output unit to provide a target voltage for a target pixel point in the target dimming period, wherein the voltage value of the target voltage is equal to the sum of the voltage value of the data voltage and the voltage value of the compensation voltage.
Further, the determining sub-module includes:
the calculation unit is used for obtaining a compensation parameter based on the voltage value of the data voltage provided by the data output unit to the target pixel point at the starting time point of the target dimming cycle;
and the determining unit is used for determining the voltage value of the compensation voltage corresponding to the voltage value of the data voltage in the mapping relation according to the compensation parameter and a preset mapping relation.
Further, still include:
and the stopping module is used for controlling the data output unit to stop providing the compensation voltage for the target pixel point after the Pulse Width Modulation (PWM) signal controls the brightness adjustment of the display screen based on the brightness adjustment instruction to be finished.
In a third aspect, an embodiment of the present invention further provides a display device, which includes a processor, a memory, and a computer program stored in the memory and executable on the processor, where the computer program, when executed by the processor, implements the steps of the voltage compensation method described above.
In a fourth aspect, the embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the voltage compensation method as described above.
In the technical scheme provided by the invention, because the PWM signal is a pulse signal, the brightness values which are changed in the process of adjusting the luminous brightness of the display screen by the PWM signal are in discrete distribution, and the brightness values which are changed in the process of adjusting the luminous brightness of the display screen are in continuous distribution by controlling the data output unit to provide the compensation voltage while adjusting the brightness by the PWM signal, so that the phenomenon that human eyes feel screen flicker caused by overlarge changes of two discrete brightness values in the process of adjusting the luminous brightness of the display screen can be avoided, and the display effect in the process of adjusting the luminous brightness of the display screen can be improved. Therefore, the technical scheme provided by the invention can improve the display effect in the process of adjusting the brightness of the display screen.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a flowchart of a voltage compensation method according to an embodiment of the invention;
FIG. 2 is a diagram illustrating a relationship between a PWM duty ratio and a luminance brightness in an embodiment of the present invention according to the prior art;
FIG. 3 is a schematic structural diagram of a voltage compensation device according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a voltage compensation device according to another embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a voltage compensation device according to another embodiment of the present invention;
fig. 6 is a schematic structural diagram of a voltage compensation device according to another embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, 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.
An embodiment of the present invention provides a voltage compensation method, as shown in fig. 1, including:
step 101: receiving a brightness adjusting instruction;
step 102: and in the process of changing the duty ratio of the PWM signal based on the brightness adjusting instruction to adjust the brightness of the display screen, controlling a data output unit to provide compensation voltage for a target pixel point, wherein the voltage value of the compensation voltage provided by the data output unit for the target pixel point in a PWM signal dimming period corresponds to the voltage value of the data voltage provided by the data output unit for the target pixel point at the starting time point of the dimming period, and the target pixel point is any pixel point in the display screen.
In the embodiment of the invention, because the PWM signal is a pulse signal, the brightness values which are changed in the process of adjusting the luminous brightness of the display screen by the PWM signal are in discrete distribution, and the brightness values which are changed in the process of adjusting the luminous brightness of the display screen are in continuous distribution by controlling the data output unit to provide the compensation voltage while adjusting the brightness by the PWM signal, so that the phenomenon that human eyes feel flickering screens due to overlarge changes of two discrete brightness values in the process of adjusting the luminous brightness of the display screen can be avoided, and the display effect in the process of adjusting the luminous brightness of the display screen can be improved. Therefore, the technical scheme provided by the invention can improve the display effect in the process of adjusting the brightness of the display screen.
The brightness adjusting instruction can be a brightness adjusting instruction sent by a remote control device (such as a remote controller, a mobile phone, a tablet computer and the like) is received; or receiving a brightness adjusting instruction input by sliding the brightness bar by the finger of the user; and receiving a brightness adjusting instruction input by pressing a physical key by a user.
The PWM signal may be a light Emission control signal on a light Emission control (EM) line, and when the received brightness adjustment instruction is a brightness increase instruction, the duty ratio of the PWM signal is increased, so that the light Emission duration of the light emitting device can be increased, and the light Emission brightness of the display screen is increased; when the received brightness adjusting instruction is a brightness reducing instruction, the duty ratio of the PWM signal is reduced, so that the light emitting duration of the light emitting device can be reduced, and the human eyes can feel that the light emitting brightness of the display screen is reduced.
The relationship between the duty ratio of the PWM signal and the light emission luminance of the light emitting device is shown in the upper graph in fig. 2, and it can be seen that the higher the duty ratio of the PWM signal is, the higher the light emission luminance Lv of the light emitting device is, i.e., the higher the light emission luminance of the display screen sensed by human eyes is; the lower the duty ratio of the PWM signal, the lower the light emission luminance Lv of the light emitting device, i.e., the lower the light emission luminance of the display screen perceived by human eyes.
Similarly, as can be seen from the upper graph in fig. 2, when the brightness is adjusted only by the duty ratio of the PWM signal, the brightness changes in a step manner, in this case, when the brightness of two adjacent levels is greater than the sensitivity range of human eyes to brightness, human eyes can perceive the irregularity of the brightness change, and feel the phenomenon of screen flicker. Specifically, when the display brightness is in a low-brightness stage, the phenomenon of screen flashing is particularly obvious in the process of adjusting the brightness of the display screen.
In the embodiment of the invention, the data output unit is controlled to provide the compensation voltage for the target pixel point in the process of changing the duty ratio of the PWM signal to adjust the luminous brightness of the display screen, so that the relationship between the duty ratio of the PWM signal and the luminous brightness of the luminous device is shown as a lower coordinate graph in FIG. 2, and the luminous brightness can be seen to be continuously changed, thus the luminous brightness is smoothly changed by human eyes in the process of changing the brightness, and the display effect in the process of adjusting the luminous brightness of the display screen is improved.
Further, the step of controlling the data output unit to provide the corresponding compensation voltage for the target pixel point includes:
acquiring a voltage value of a data voltage provided by the data output unit to a target pixel point at an initial time point of a target dimming cycle through a voltage register, wherein the target dimming cycle is any dimming cycle in the process of controlling the brightness adjustment of the display screen by the PWM signal;
determining a voltage value of a compensation voltage corresponding to a voltage value of the data voltage;
and in the target dimming period, controlling the data output unit to provide a target voltage for a target pixel point, wherein the voltage value of the target voltage is equal to the sum of the voltage value of the data voltage and the voltage value of the compensation voltage.
In this embodiment, the data output unit provides the corresponding compensation voltage for the actual situation of each dimming cycle, that is, the voltage value of the compensation voltage is changed to compensate for the next dimming cycle after the end of one dimming cycle. Wherein the duration of the dimming period is related to the resolution of the PWM signal.
Under the normal gray scale adjustment (Gamma tuning) of the display device, the voltage register stores the voltage value of the data voltage provided by the data output unit to the target pixel point at the starting time point of the target dimming period, and the voltage value is the voltage value Vdata of the data voltage provided by the data output unit under the uncompensated voltage of the data output unitPractice of。
In this embodiment, the display device can be real-time based on Vdata in each dimming cyclePractice ofΔ Vdata is calculated according to the following principle:
setting the light-emission control signal as a PWM signalThe minimum period is a, the resolution of the screen is m × n, the maximum brightness of the screen is x, and the resolution of the PWM signal is
The luminance step value c of the adjacent two-step light emission luminance is b × x.
Assuming that the brightness step value c of the two-step brightness is greater than the predetermined brightness value (e.g. 1.3nit), human eyes can feel the irregularity of the brightness change, so in order to make human eyes feel the smooth brightness change, it is usually required to adjust only 3% of the brightness value within one dimming period (the brightness at the starting time point of the dimming period × 0.03 < 1.3 nit).
Taking reducing the brightness of the display screen as an example, the duty ratio of the PWM signal at the starting time point of the dimming period is PWM1, the brightness value is Lv1, the duty ratio of the PWM signal at the ending time point of the dimming period is PWM2, the brightness value is Lv2, PWM1 is more than PWM2, and Lv1 is more than Lv 2; the requirements are satisfied:
according to the principle of brightness control:
and I-2It is possible to obtain:
wherein K is a coefficient between a driving voltage and a driving circuit in the OLED and depends on the material of the OLED;depending on the minimum resolution of the PWM signal, for example: with a minimum resolution of 0.12 for the PWM signal,
under the constraint of the above conditions, the compensation voltage value Δ Vdata ═ Vdata for any dimming periodPractice of-VdataTarget. Wherein, VdataTargetThat is, the driving voltage corresponding to the luminance Lv2(Lv1 > Lv2 > Lv1 × 0.97) at the end time point calculated from the luminance Lv1 at the start time point of the dimming cycle corresponds to the above-mentioned Vdata2；VdataPractice ofThe data voltage provided by the data driving unit at the beginning time of the dimming period is equivalent to Vdata1。
The compensation voltage for each dimming cycle can be calculated by the method.
Of course, the display device may calculate each Vdata in advance by the above calculation principlePractice ofCorresponding delta Vdata are correlated with each other to form a first mapping relation and then are stored in the display device, and the corresponding delta Vdata are directly stored in the display device through the VdataPractice ofThe corresponding Δ Vdata may be determined.
After the compensation voltage delta Vdata is determined, the Vdata originally output by the data output unit is usedPractice ofTo output a target voltage Vdata capable of making a luminance change within a dimming period less than 1.3nitTarget。
The above-mentioned brightness step value c is greater than 1.3nit, and 1.3nit in the irregularity of brightness change can be perceived by human eyes, which is only an example, the sensitivity range of human eyes of different users to brightness may be different, and the preset brightness value may be 1.2nit, 1.4nit, and the like, and is not limited herein.
In this embodiment, the compensation voltage provided by the data output unit in the dimming period is determined by the voltage value of the data voltage provided by the data output unit to the pixel point at the starting time point of the dimming period, so that the brightness change of the display screen is smooth in the human eye sense of the brightness change in each dimming period, and the display effect in the process of adjusting the brightness of the display screen is improved.
Further, the determining of the voltage value of the compensation voltage corresponding to the voltage value of the data voltage includes:
obtaining a compensation parameter based on a voltage value of a data voltage provided by the data output unit to a target pixel point at an initial time point of a target dimming cycle;
and determining the voltage value of the compensation voltage corresponding to the voltage value of the data voltage in the mapping relation according to the compensation parameter and a preset mapping relation.
In this embodiment, the relationship between the data voltage and the duty ratio of the PWM signal conforms to the following polynomial relationship:
f(x)＝p1*xn+p2*xn-1+p3*xn-2......pn*x+q；
where p and q are determined by the screen characteristics.
Therefore, the above-mentioned Vdata1 ═ f (PWM1) ═ p1 ═ PWM1n+p2*PWM1n-1+p3*PWM1n-2.... pn. PWM1+ q; the above-mentioned Vdata2 ═ f (PWM2) ═ p1 ═ PWM2n+p2*PWM2n-1+p3*PWM2n-2......pn*PWM2+q。
Accordingly, the compensation voltage Δ Vdata is also determined to be Δ Vdata ═ g (x) ═ t1 ×n+t2*xn-1+t3*xn -2......t*x+r。
Thus, a compensation voltage is obtained
Can be combined with matrix
As compensation parameters, 256 matrixes of the same type can be obtained by calculation as compensation parameters for different conditions, and the 256 matrixes are solved to form a second mapping relation and stored in the display device for subsequent calling.
Subsequently, the voltage value of the data voltage provided by the pixel point at the starting time point of the dimming cycle by the data output unit is obtained, so that the compensation parameter can be calculated, and the voltage value of the compensation voltage corresponding to the compensation coefficient is determined by calling the second mapping relation.
In addition, f (x) p1 x is providedn+p2*xn-1+p3*xn-2... the parameter n in pn x + q is calculated by performing a plurality of tests using different values of n, each test resulting in a compensation voltage, selected from among the compensation voltagesAnd taking the value of n corresponding to the compensation voltage with the optimal brightness effect as the parameter n of the formula. In this embodiment, the number of tests is greater than 100.
Further, after the step of controlling the data output unit to provide the compensation voltage for the target pixel point, the method further includes:
and after the Pulse Width Modulation (PWM) signal controls the brightness adjustment of the display screen based on the brightness adjustment instruction, controlling the data output unit to stop providing the compensation voltage for the target pixel point.
Due to the existence of the compensation voltage, the voltage value output by the data output unit is different from the data voltage value corresponding to normal display, and if the data output unit continuously provides the compensation voltage after the brightness adjustment of the display screen is finished, the display distortion is caused.
Therefore, in this embodiment, after the brightness adjustment of the display screen is controlled to be completed, the data output unit is controlled to stop providing the compensation voltage for the target pixel point, so that the display of the display screen can be restored to be real when the brightness of the display screen is not changed.
Referring to fig. 3, which is a schematic structural diagram of a voltage compensation apparatus according to an embodiment of the present invention, as shown in fig. 3, the voltage compensation apparatus 300 includes a receiving module 310 and a control module 320, which are connected to each other, wherein,
a receiving module 310, configured to receive a brightness adjustment instruction;
the control module 320 is configured to control the data output unit to provide the compensation voltage to the target pixel point in a process of controlling the brightness adjustment of the display screen based on the brightness adjustment instruction by the PWM signal, where a voltage value of the compensation voltage provided by the data output unit to the target pixel point in a PWM signal dimming cycle corresponds to a voltage value of the data voltage provided by the data output unit to the target pixel point at an initial time point of the dimming cycle, and the target pixel point is any one pixel point in the display screen.
Further, as shown in fig. 4, the control module 320 includes:
the obtaining submodule 321 is configured to obtain, through the voltage register, a voltage value of a data voltage provided by the data output unit to a target pixel at an initial time point of a target dimming cycle, where the target dimming cycle is any dimming cycle in a process of controlling brightness adjustment of a display screen by a PWM signal;
a determination submodule 322 for determining a voltage value of the compensation voltage corresponding to the voltage value of the data voltage;
the control submodule 323 is configured to control the data output unit to provide a target voltage to a target pixel point in the target dimming period, where a voltage value of the target voltage is equal to a sum of a voltage value of the data voltage and a voltage value of the compensation voltage.
Further, as shown in fig. 5, the determining submodule 322 includes:
the calculating unit 3221 is configured to obtain a compensation parameter based on a voltage value of the data voltage provided by the data output unit to the target pixel at the starting time point of the target dimming cycle;
the determining unit 3222 is configured to determine, according to the compensation parameter and a preset mapping relationship, a voltage value of the compensation voltage corresponding to the voltage value of the data voltage in the mapping relationship.
Further, as shown in fig. 6, the apparatus further includes a stopping module 330, configured to control the data output unit to stop providing the compensation voltage for the target pixel point after the PWM signal controls the display screen to adjust the brightness based on the brightness adjusting instruction.
The voltage compensation apparatus 300 according to the embodiment of the present invention can implement each process of the voltage compensation method in the method embodiments of fig. 1-2, and is not described herein again to avoid repetition.
The voltage compensation device 300 of the embodiment of the invention can avoid the phenomenon that the two discrete brightness values are too large in the process of adjusting the brightness of the display screen, so that human eyes feel screen flicker, and can improve the display effect in the process of adjusting the brightness of the display screen.
The embodiment of the invention also provides a display device which comprises the voltage compensation device.
The display device includes but is not limited to: radio frequency unit, network module, audio output unit, input unit, sensor, display unit, user input unit, interface unit, memory, processor, and power supply. It will be appreciated by those skilled in the art that the above described configuration of the display device does not constitute a limitation of the display device, and that the display device may comprise more or less of the components described above, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the display device includes, but is not limited to, a display, a mobile phone, a tablet computer, a television, a wearable electronic device, a navigation display device, virtual reality glasses, and the like.
Wherein the processor is configured to: receiving a brightness adjusting instruction; and in the process of changing the duty ratio of the PWM signal based on the brightness adjusting instruction to adjust the brightness of the display screen, controlling a data output unit to provide compensation voltage for a target pixel point, wherein the voltage value of the compensation voltage provided by the data output unit for the target pixel point in a PWM signal dimming period corresponds to the voltage value of the data voltage provided by the data output unit for the target pixel point at the starting time point of the dimming period, and the target pixel point is any pixel point in the display screen.
Optionally, in the step of executing that the control data output unit provides the corresponding compensation voltage for the target pixel point, the processor may include: acquiring a voltage value of a data voltage provided by the data output unit to a target pixel point at an initial time point of a target dimming cycle through a voltage register, wherein the target dimming cycle is any dimming cycle in the process of controlling the brightness adjustment of the display screen by the PWM signal; determining a voltage value of a compensation voltage corresponding to a voltage value of the data voltage; and in the target dimming period, controlling the data output unit to provide a target voltage for a target pixel point, wherein the voltage value of the target voltage is equal to the sum of the voltage value of the data voltage and the voltage value of the compensation voltage.
Optionally, in the step of determining the voltage value of the compensation voltage corresponding to the voltage value of the data voltage, the processor may include: obtaining a compensation parameter based on a voltage value of a data voltage provided by the data output unit to a target pixel point at an initial time point of a target dimming cycle; and determining the voltage value of the compensation voltage corresponding to the voltage value of the data voltage in the mapping relation according to the compensation parameter and a preset mapping relation.
Optionally, the processor is further configured to: and after the Pulse Width Modulation (PWM) signal controls the brightness adjustment of the display screen based on the brightness adjustment instruction, controlling the data output unit to stop providing the compensation voltage for the target pixel point.
The display device can implement the processes implemented by the voltage compensation device in the foregoing embodiments, and further description is omitted here to avoid repetition.
The display device provided by the embodiment of the invention can avoid the phenomenon that human eyes feel screen flicker due to overlarge changes of two discrete brightness values in the process of adjusting the brightness of the display screen, and can improve the display effect in the process of adjusting the brightness of the display screen.
Preferably, an embodiment of the present invention further provides a display device, including the processor, the memory, and a computer program stored in the memory and capable of running on the processor, where the computer program, when executed by the processor, implements the processes of the voltage compensation method embodiment, and can achieve the same technical effects, and details are not repeated here to avoid repetition.
The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the voltage compensation method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
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 "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "under" another element, it can be "directly on" or "under" the other element or intervening elements may be present.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A method of voltage compensation, comprising:
receiving a brightness adjusting instruction;
and in the process of changing the duty ratio of the PWM signal based on the brightness adjusting instruction to adjust the brightness of the display screen, controlling a data output unit to provide compensation voltage for a target pixel point, wherein the voltage value of the compensation voltage provided by the data output unit for the target pixel point in a PWM signal dimming period corresponds to the voltage value of the data voltage provided by the data output unit for the target pixel point at the starting time point of the dimming period, and the target pixel point is any pixel point in the display screen.
2. The voltage compensation method of claim 1, wherein the step of controlling the data output unit to provide the corresponding compensation voltage to the target pixel point comprises:
acquiring a voltage value of a data voltage provided by the data output unit to a target pixel point at an initial time point of a target dimming cycle through a voltage register, wherein the target dimming cycle is any dimming cycle in the process of controlling the brightness adjustment of the display screen by the PWM signal;
determining a voltage value of a compensation voltage corresponding to a voltage value of the data voltage;
and in the target dimming period, controlling the data output unit to provide a target voltage for a target pixel point, wherein the voltage value of the target voltage is equal to the sum of the voltage value of the data voltage and the voltage value of the compensation voltage.
3. The voltage compensation method of claim 2, wherein the step of determining a voltage value of a compensation voltage corresponding to a voltage value of the data voltage comprises:
obtaining a compensation parameter based on a voltage value of a data voltage provided by the data output unit to a target pixel point at an initial time point of a target dimming cycle;
and determining the voltage value of the compensation voltage corresponding to the voltage value of the data voltage in the mapping relation according to the compensation parameter and a preset mapping relation.
4. The voltage compensation method according to claim 1, wherein after the step of controlling the data output unit to provide the compensation voltage to the target pixel point, the method further comprises:
and after the Pulse Width Modulation (PWM) signal controls the brightness adjustment of the display screen based on the brightness adjustment instruction, controlling the data output unit to stop providing the compensation voltage for the target pixel point.
5. A voltage compensation apparatus, comprising:
the receiving module is used for receiving a brightness adjusting instruction;
and the control module is used for controlling the data output unit to provide compensation voltage for the target pixel point in the process of controlling the brightness adjustment of the display screen by the Pulse Width Modulation (PWM) signal based on the brightness adjustment instruction, the voltage value of the compensation voltage provided by the data output unit for the target pixel point in a PWM signal dimming cycle corresponds to the voltage value of the data voltage provided by the data output unit for the target pixel point at the starting time point of the dimming cycle, and the target pixel point is any pixel point in the display screen.
6. The voltage compensation apparatus of claim 5, wherein the control module comprises:
the acquisition submodule is used for acquiring a voltage value of a data voltage provided by the data output unit to a target pixel point at an initial time point of a target dimming cycle through a voltage register, wherein the target dimming cycle is any dimming cycle in the process of controlling the brightness of the display screen to be adjusted through a PWM signal;
a determination submodule for determining a voltage value of a compensation voltage corresponding to a voltage value of the data voltage;
and the control submodule is used for controlling the data output unit to provide a target voltage for a target pixel point in the target dimming period, wherein the voltage value of the target voltage is equal to the sum of the voltage value of the data voltage and the voltage value of the compensation voltage.
7. The voltage compensation apparatus of claim 6, wherein the determination submodule comprises:
the calculation unit is used for obtaining a compensation parameter based on the voltage value of the data voltage provided by the data output unit to the target pixel point at the starting time point of the target dimming cycle;
and the determining unit is used for determining the voltage value of the compensation voltage corresponding to the voltage value of the data voltage in the mapping relation according to the compensation parameter and a preset mapping relation.
8. The voltage compensation device of claim 1, further comprising:
and the stopping module is used for controlling the data output unit to stop providing the compensation voltage for the target pixel point after the Pulse Width Modulation (PWM) signal controls the brightness adjustment of the display screen based on the brightness adjustment instruction to be finished.
9. A display device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the voltage compensation method according to any one of claims 1 to 4.
10. A computer-readable storage medium, characterized in that a computer program is stored thereon, which computer program, when being executed by a processor, carries out the steps of the voltage compensation method according to any one of claims 1 to 4.
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