CN114360447B - Display driving method and display - Google Patents
Display driving method and display Download PDFInfo
- Publication number
- CN114360447B CN114360447B CN202210001598.0A CN202210001598A CN114360447B CN 114360447 B CN114360447 B CN 114360447B CN 202210001598 A CN202210001598 A CN 202210001598A CN 114360447 B CN114360447 B CN 114360447B
- Authority
- CN
- China
- Prior art keywords
- voltage
- display
- driving
- target
- feedback voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000000630 rising effect Effects 0.000 claims abstract description 6
- 238000006243 chemical reaction Methods 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 8
- 230000004044 response Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 16
- 230000008569 process Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The application relates to a driving method of a display and the display, wherein the driving method of the display comprises the following steps: dividing a driving voltage range of the display into a plurality of voltage intervals; detecting the current feedback voltage of the display; determining a target feedback voltage according to the multiple voltage intervals and the current feedback voltage; and determining a target driving voltage of the display according to the target feedback voltage so as to drive the display to display. According to the application, the driving voltage range of the display is divided into a plurality of voltage intervals, the current feedback voltage of the display is detected, then the target feedback voltage is determined according to the voltage intervals and the current feedback voltage, and finally the target driving voltage of the display is determined according to the target feedback voltage so as to drive the display to display, so that the problem of false triggering open circuit protection caused by gradual rising of the power supply voltage of the display can be solved, the feedback response speed is improved, and the stability of backlight driving is enhanced.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a driving method of a display and a display.
Background
Currently, with the higher demands of consumers on television display image quality, many brand new display technologies are presented. Among them, miniLED technology has received a great deal of attention. MiniLED is applied to the backlight part of the display, and the fine control of the minimum partition can be realized through a driving system, so that the display effect of the OLED is comparable. In practical applications, the HDR standard of current image quality requires that the peak luminance of the display needs to reach very high values (e.g. above 1000 nits), while the Local Dimming (i.e. Dimming) technique requires that the backlight can quickly follow the different luminance of the picture display, e.g. the backlight needs to support momentary switching from the darkest state to the brightest state.
However, in the related art, when the backlight is instantaneously switched from the darkest state to the brightest state, the power supply voltage of the backlight is adjusted step by step. In the process of detecting the backlight voltage, the backlight voltage is too low for a long time in the process of step-by-step adjustment, so that an open circuit protection mechanism can be triggered by mistake, and the stability of the display is reduced.
Disclosure of Invention
In view of this, the application provides a driving method of a display and a display, which can solve the problem of false triggering open circuit protection caused by gradual rise of the power supply voltage of the display, improve the feedback response speed and enhance the stability of backlight driving.
According to an aspect of the present application, there is provided a driving method of a display, the driving method of the display including: dividing a driving voltage range of the display into a plurality of voltage intervals; detecting the current feedback voltage of the display; determining a target feedback voltage according to the voltage intervals and the current feedback voltage; and determining a target driving voltage of the display according to the target feedback voltage so as to drive the display to display.
Further, dividing the driving voltage range of the display into a plurality of voltage intervals includes: determining a driving voltage range of the display; and equally dividing the driving voltage range of the display to obtain a plurality of voltage intervals with equal lengths.
Further, determining a driving voltage range of the display includes: determining a maximum brightness and a minimum brightness of the display; determining a maximum value of a driving voltage corresponding to the maximum brightness according to the maximum brightness; determining a minimum value of the driving voltage corresponding to the minimum brightness according to the minimum brightness; and determining a driving voltage range according to the maximum value of the driving voltage and the minimum value of the driving voltage.
Further, dividing the driving voltage range of the display equally to obtain a plurality of voltage intervals with equal lengths, including: determining a number of resistances equal to the number of voltage intervals; and dividing the driving voltage range by using the resistors to obtain a plurality of voltage intervals with equal length.
Further, detecting a current feedback voltage of the display includes: and adjusting the initial feedback voltage according to the preset feedback voltage step length to obtain the current feedback voltage of the display.
Further, determining a target feedback voltage from the plurality of voltage intervals and the current feedback voltage includes: comparing the current feedback voltage with each endpoint value of the voltage intervals in sequence according to a preset sequence until the voltage interval where the current feedback voltage is located is determined; and determining a target endpoint value of the voltage interval in which the current feedback voltage is located as a target feedback voltage.
Further, comparing the current feedback voltage with each endpoint value of the voltage intervals in sequence according to a preset sequence until the voltage interval where the current feedback voltage is located is determined, including: arranging the end values of the voltage intervals according to the sizes; and comparing the current feedback voltage with the endpoint value positioned in the middle preferentially, and gradually determining the voltage interval in which the current feedback voltage is positioned.
Further, determining the target endpoint value of the voltage interval in which the current feedback voltage is located as the target feedback voltage includes: determining any one endpoint value of a voltage interval in which the current feedback voltage is located as the target endpoint value; and determining the target endpoint value as a target feedback voltage.
Further, determining a target driving voltage of the display according to the target feedback voltage includes: determining an input power supply voltage for the display; and determining a target driving voltage of the display according to the input power supply voltage and the target feedback voltage.
According to another aspect of the present application, there is provided a display including: the driving voltage dividing module is electrically connected with the detection module and is used for dividing the driving voltage range of the display into a plurality of voltage intervals; the detection module is electrically connected with the driving voltage dividing module and the target feedback voltage determining module and is used for detecting the current feedback voltage of the display; the target feedback voltage determining module is electrically connected with the detecting module and the target driving voltage determining module and is used for determining target feedback voltage according to the voltage intervals and the current feedback voltage; and the target driving voltage determining module is electrically connected with the target feedback voltage determining module and is used for determining the target driving voltage of the display according to the target feedback voltage so as to drive the display to display.
The driving voltage range of the display is divided into a plurality of voltage intervals, the current feedback voltage of the display is detected, then the target feedback voltage is determined according to the voltage intervals and the current feedback voltage, and finally the target driving voltage of the display is determined according to the target feedback voltage so as to drive the display to display.
Drawings
The technical solution and other advantageous effects of the present application will be made apparent by the following detailed description of the specific embodiments of the present application with reference to the accompanying drawings.
Fig. 1 shows a schematic diagram of a related art LED driving chip.
Fig. 2 shows a schematic diagram of a related art backlight driving architecture.
Fig. 3 shows a schematic diagram of a feedback voltage variation of the related art.
Fig. 4 shows a schematic diagram of a related art b-point voltage variation.
Fig. 5 is a schematic diagram showing a driving method of a display according to an embodiment of the present application.
Fig. 6 shows a schematic diagram of driving voltage division according to an embodiment of the application.
Fig. 7 shows a schematic diagram of driving voltage division according to an embodiment of the present application.
Fig. 8 is a schematic diagram showing a driving method of a display according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements or interaction relationship between the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
The following disclosure provides many different embodiments, or examples, for implementing different features of the application. In order to simplify the present disclosure, components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials. In some instances, well known methods, procedures, components, and circuits have not been described in detail so as not to obscure the present application.
Fig. 1 shows a schematic diagram of a related art LED driving chip.
As shown in fig. 1, in the related art, 11 may represent a light emitting unit of a MiniLED display panel, which may be controlled by a VLED voltage; 12 may represent a part of an internal circuit of an LED driving chip that may perform constant current detection on an output (i.e., node b) of the light emitting unit 11 to control the magnitude of a voltage applied to the light emitting unit.
Referring to fig. 1, the LED driving chip may be provided therein with a transistor T1, a transistor T2, an operational amplifier OP1, an operational amplifier OP2, and a constant current resistor. Taking the transistor T1 and the transistor T2 as NMOS, the gate of the transistor T1 may receive the PWM signal, the source of the transistor T1 is electrically connected to the drain of the transistor T2, and the drain of the transistor T1 may be electrically connected to the node b; the gate of the transistor T2 may receive the output of the operational amplifier OP1, the operational amplifier OP1 may be used to amplify the digital-to-analog output (DAC), and the source of the transistor T2 may be grounded through the constant current resistor Rsense; the input of the operational amplifier OP2 may be electrically connected to the node b, and a Control signal Control is output based on the potential of the node b to Control the VLED voltage level.
Fig. 2 shows a schematic diagram of a related art backlight driving architecture.
As shown in fig. 2, in the related art, a backlight driving architecture of a MiniLED display panel may include a DC-DC unit, a light emitting unit, and an LED driving chip (i.e., an LED Driver IC). The DC-DC unit, namely a power supply unit, can generate VLED voltage according to the received power supply input Vin and feedback voltage FB so as to control the light-emitting unit to emit light.
The LED driving chip in fig. 2 is 12 in fig. 1. Referring to fig. 2, the output of the led driving chip is a feedback voltage, which is regulated by a resistor R1 and a resistor R2. When the light emitting unit needs to be switched from a dark state to a high-brightness state, the required VLED voltage is increased instantaneously, and at the moment, the LED driving chip can control the VLED voltage output by the DC-DC through the feedback pin so as to ensure that enough driving voltage is provided for the light emitting unit.
In addition, the LED driving chip also has an open circuit detection protection function by detecting the voltage of the point b. When the voltage at the b point is lower than a set value (for example, 50 mV) and the duration exceeds the set value (for example, 50 ms), the LED driving chip judges that the light emitting unit of the channel is open, and at the moment, the LED driving chip starts a protection function.
Fig. 3 shows a schematic diagram of a feedback voltage variation of the related art, and fig. 4 shows a schematic diagram of a b-point voltage variation of the related art.
As shown in fig. 3, the feedback voltage (i.e., FB voltage) may be adjusted from the initial voltage to the target voltage, but may be adjusted from the target voltage to the initial voltage in the reverse direction. The initial voltage may be an initial feedback voltage and the target voltage may be a feedback voltage of a target to be regulated. During the regulation of the feedback voltage, the initial voltage is stepped up to the target voltage, resulting in a stepwise increase in VLED. Therefore, when the light emitting unit is instantaneously switched from the dark state to the brightest state, the situation in fig. 4 occurs, that is, the potential at the point b is at a low potential for a long time, and the open circuit protection mechanism is triggered by mistake, so that the channel of the LED driving chip is turned off, and the light emitting unit cannot display normally.
In view of the above, the present application provides a driving method of a display, the driving method of the display including: dividing a driving voltage range of the display into a plurality of voltage intervals; detecting the current feedback voltage of the display; determining a target feedback voltage according to the voltage intervals and the current feedback voltage; and determining a target driving voltage of the display according to the target feedback voltage so as to drive the display to display.
The application can solve the problem of false triggering open circuit protection caused by gradual rising of the power supply voltage of the display, promote feedback response speed and enhance the stability of backlight driving.
Fig. 5 is a schematic diagram showing a driving method of a display according to an embodiment of the present application.
As shown in fig. 5, a driving method of a display according to an embodiment of the present application includes:
step S1: dividing a driving voltage range of the display into a plurality of voltage intervals;
specifically, the display according to the embodiment of the application may include a power conversion unit, a light emitting unit, and a driving unit. The power conversion unit, the light emitting unit, and the driving unit may be disposed at a backlight portion of the display. It will be appreciated that other parts such as interface circuits may be included in the display, and the application is not limited to the specific internal structure of the display.
The power conversion unit can be electrically connected with the light emitting unit and the driving unit, the light emitting unit can be electrically connected with the power conversion unit and the driving unit, and the driving unit can be electrically connected with the power conversion unit and the light emitting unit. When in actual work, the power supply conversion unit outputs the driving voltage to drive the light-emitting unit to emit light; the driving unit can detect the voltage output by the light-emitting unit and output feedback voltage to the power supply conversion unit according to the voltage; the power supply conversion unit adjusts the output driving voltage according to the feedback voltage, so as to control the luminous intensity of the luminous unit.
Further, dividing the driving voltage range of the display into a plurality of voltage intervals includes:
step S11: determining a driving voltage range of the display;
the driving voltage range of the display can be set according to the requirement. For example, the drive voltage range may be set to Vmin-Vmax. Illustratively, vmin may be 0.
Further, determining a driving voltage range of the display includes:
step S111: determining a maximum brightness and a minimum brightness of the display;
the maximum brightness and the minimum brightness of the display may be the maximum brightness and the minimum brightness of all display areas of the display, or the maximum brightness and the minimum brightness of local display areas of the display. For example, the pixels of the display are 1024×768, and the maximum brightness and the minimum brightness of the display may be the maximum brightness and the minimum brightness of 1024×768 pixels, or the maximum brightness and the minimum brightness of 128×128 pixels in all pixels. It will be appreciated that the application is not limited as to how the maximum brightness and minimum brightness of the display are determined.
Step S112: determining a maximum value of a driving voltage corresponding to the maximum brightness according to the maximum brightness;
step S113: determining a minimum value of the driving voltage corresponding to the minimum brightness according to the minimum brightness;
step S112 and step S113 may be performed simultaneously or in any order. It will be appreciated that the application is not limited as to how the maximum and minimum values of the drive voltage corresponding to the maximum luminance are determined.
Step S114: and determining a driving voltage range according to the maximum value of the driving voltage and the minimum value of the driving voltage.
The two end points of the driving voltage range may be a maximum value of the driving voltage and a minimum value of the driving voltage, respectively.
Step S12: and equally dividing the driving voltage range of the display to obtain a plurality of voltage intervals with equal lengths.
Illustratively, the display has a drive voltage in the range of Vmin-Vmax. The driving voltage range is divided by N equally, and the length of each voltage section may be (1/N) ×vmax-Vmin. Where N may be a natural number.
Further, dividing the driving voltage range of the display equally to obtain a plurality of voltage intervals with equal lengths, including:
step S121: determining a number of resistances equal to the number of voltage intervals;
step S122: and dividing the driving voltage range by using the resistors to obtain a plurality of voltage intervals with equal length.
Illustratively, the number of the plurality of resistors is N, which is the same as the number of the plurality of voltage intervals. Vmin may be zero potential ground and Vmax may be a preset potential. Between zero potential and the preset potential, N resistors can be arranged, and the voltage obtained by dividing each resistor is (1/N) ×Vmax-Vmin. It should be noted that each resistor may be electrically connected to one switching transistor, and connected to a feedback voltage node of the driving unit through a corresponding switching transistor, so as to control the potential on the corresponding voltage interval to be output to the feedback voltage node, thereby controlling the power conversion unit to adjust the output driving voltage.
Step S2: detecting the current feedback voltage of the display;
wherein detecting the current feedback voltage of the display comprises:
step S21: and adjusting the initial feedback voltage according to the preset feedback voltage step length to obtain the current feedback voltage of the display.
The initial feedback voltage may be a voltage output from the driving unit to the power conversion unit in an initial state. The initial feedback voltage may correspond to a certain brightness of the display, and the initial feedback voltage may not be 0.
Further, the feedback voltage step size can be set as required. In practical application, the initial feedback voltage can be adjusted step by step according to the requirement. For example, the initial feedback voltage may be 0.5V. At this time, the brightness of the light emitting unit needs to be adjusted to a higher brightness, and the feedback voltage may be sequentially adjusted to 1.5V, 2.5V, and 3.5V … according to a step size of 1V from 0.5V until the brightness of the light emitting unit reaches a desired value.
Step S3: determining a target feedback voltage according to the voltage intervals and the current feedback voltage;
further, determining a target feedback voltage from the plurality of voltage intervals and the current feedback voltage includes:
step S31: comparing the current feedback voltage with each endpoint value of the voltage intervals in sequence according to a preset sequence until the voltage interval where the current feedback voltage is located is determined;
illustratively, the current feedback voltage is 2.5V and the plurality of voltage intervals are 0V-1V, 1V-2V, 2V-3V, 3V-4V. At this time, the 2.5V may be compared with the end points 0V and 1V of the first voltage interval, and the feedback voltage 2.5V is greater than the two end points of the first voltage interval, so that the comparison between the 2.5V and the end points of the second voltage interval is continued, and the comparison is sequentially performed, so as to finally obtain that the feedback voltage 2.5V is located in the third voltage interval.
Further, comparing the current feedback voltage with each endpoint value of the voltage intervals in sequence according to a preset sequence until the voltage interval where the current feedback voltage is located is determined, including:
step S311: arranging the end values of the voltage intervals according to the sizes;
step S312: and comparing the current feedback voltage with the endpoint value positioned in the middle preferentially, and gradually determining the voltage interval in which the current feedback voltage is positioned.
Illustratively, the current feedback voltage is 1.5V and the plurality of voltage intervals are 0V-1V, 1V-2V, 2V-3V, 3V-4V. At this time, 1.5V may be compared with half of the maximum value of 4V (i.e., 2V), and the other end value of the voltage interval between 1.5V and 2V (i.e., 3V) is compared, so that 1.5V is smaller than the two end values of the third voltage interval, and thus, the comparison of 1.5V with half of 2V (i.e., 1V) is continued, and the other end value of the voltage interval between 1.5V and 1V (i.e., 2V) is compared, so that 1.5V is located within the second voltage interval. Therefore, the maximum value of the driving voltage range is gradually halved, the comparison range is reduced, the voltage interval where the current feedback voltage is located can be more rapidly positioned, and the adjustment efficiency of the driving voltage is improved.
Step S32: and determining a target endpoint value of the voltage interval in which the current feedback voltage is located as a target feedback voltage.
Further, determining the target endpoint value of the voltage interval in which the current feedback voltage is located as the target feedback voltage includes:
step S321: determining any one endpoint value of a voltage interval in which the current feedback voltage is located as the target endpoint value;
step S322: and determining the target endpoint value as a target feedback voltage.
Illustratively, the current feedback voltage is 1.5V and the plurality of voltage intervals are 0V-1V, 1V-2V, 2V-3V, 3V-4V. At this time, 1.5V may be compared with half of the maximum value of 4V (i.e., 2V), and the other end value of the voltage interval between 1.5V and 2V (i.e., 3V) is compared, so that 1.5V is smaller than the two end values of the third voltage interval, and thus, the comparison of 1.5V with half of 2V (i.e., 1V) is continued, and the other end value of the voltage interval between 1.5V and 1V (i.e., 2V) is compared, so that 1.5V is located within the second voltage interval. At this time, the current feedback voltage may be adjusted to a smaller end point value of 1V in the second voltage section. Of course, the current feedback voltage may be adjusted to be 2V, which is the larger end point of the second voltage section, and the present application is not limited thereto.
Fig. 6 shows a schematic diagram of driving voltage division according to an embodiment of the application.
As shown in fig. 6, the driving voltage range may be divided into 8 parts, each of which has a length of 1/8Vmax. The current feedback voltage may be between 1/8Vmax and 2/8Vmax, at which point the current feedback voltage may be adjusted to 1/8Vmax.
Fig. 7 shows a schematic diagram of driving voltage division according to an embodiment of the present application.
As shown in fig. 7, at the hardware level, the embodiment of the present application may divide the driving voltage using a plurality of resistors, and each resistor may be connected to the FB node (i.e., the feedback voltage node) in fig. 2 through one switching transistor. It will be appreciated that the partitioning of fig. 7 is exemplary. In practical applications, the hardware structure of the display may be set in conjunction with fig. 1 and 2, and the present application is not limited thereto.
Step S4: and determining a target driving voltage of the display according to the target feedback voltage so as to drive the display to display.
Further, determining a target driving voltage of the display according to the target feedback voltage includes:
step S41: determining an input power supply voltage for the display;
step S42: and determining a target driving voltage of the display according to the input power supply voltage and the target feedback voltage.
The input power supply voltage of the display can be set according to the requirement. The input power voltage and the target feedback voltage may be input together into a power conversion unit, and the power conversion unit may determine a target driving voltage of the display according to the input power voltage and the target feedback voltage. The target driving voltage is used to drive the light emitting unit.
Therefore, the embodiment of the application firstly selects the current feedback voltage to the voltage close to the end point of the voltage interval, then modulates the target driving voltage in a step-by-step voltage regulation mode, can improve the adjustment efficiency of the target driving voltage, achieves the aim of quickly responding the feedback voltage by the target driving voltage, avoids the problem of false triggering open circuit protection caused by excessively low voltage output by the light-emitting unit for a long time, and improves the reliability of the display.
Fig. 8 is a schematic diagram showing a driving method of a display according to an embodiment of the present application.
As shown in fig. 8, vtarget may represent the current feedback voltage. When judging the voltage interval where the current feedback voltage is located, comparing the current feedback voltage with 1/2 Vmax; if the current feedback voltage is greater than or equal to 1/2Vmax, then comparing the current feedback voltage with 3/4Vmax (i.e., 6/8 Vmax); if the current feedback voltage is greater than or equal to 3/4Vmax, the current feedback voltage is compared with 7/8Vmax, if the current feedback voltage is greater than or equal to 7/8Vmax, the switch transistor S1 in fig. 7 is set high, the voltage of the FB node is adjusted to 7/8Vmax at this time, and the other cases are similar.
According to the embodiment of the application, the driving voltage range is divided, whether the current feedback voltage is located in the divided voltage interval is judged, then the current feedback voltage is readjusted to the endpoint value of the voltage interval where the feedback voltage is located, and the target driving voltage is generated according to the adjusted feedback voltage to drive the light-emitting unit to emit light, so that the problem of false triggering open circuit protection caused by gradual rising of the power supply voltage of the display can be solved, the feedback response speed is improved, and the stability of backlight driving is enhanced.
It should be noted that, based on the inventive concept of the present application, the driving voltage range may be divided, whether the current driving voltage is located in the divided voltage interval may be determined, then the current driving voltage may be readjusted to the endpoint value of the voltage interval where the feedback voltage is located, and further the target driving voltage may be generated according to the adjusted driving voltage to drive the light emitting unit to emit light. It will be appreciated that various modifications based on the application are within the scope of the application.
In addition, the application also provides a display, which comprises: the driving voltage dividing module is electrically connected with the detection module and is used for dividing the driving voltage range of the display into a plurality of voltage intervals; the detection module is electrically connected with the driving voltage dividing module and the target feedback voltage determining module and is used for detecting the current feedback voltage of the display; the target feedback voltage determining module is electrically connected with the detecting module and the target driving voltage determining module and is used for determining target feedback voltage according to the voltage intervals and the current feedback voltage; and the target driving voltage determining module is electrically connected with the target feedback voltage determining module and is used for determining the target driving voltage of the display according to the target feedback voltage so as to drive the display to display.
In summary, in the embodiment of the present application, the driving voltage range of the display is divided into a plurality of voltage intervals, the current feedback voltage of the display is detected, then the target feedback voltage is determined according to the plurality of voltage intervals and the current feedback voltage, and finally the target driving voltage of the display is determined according to the target feedback voltage, so as to drive the display to display, thereby solving the problem of false triggering open circuit protection caused by step-by-step rising of the power supply voltage of the display, improving the feedback response speed, and enhancing the stability of backlight driving.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The driving method of the display and the display provided by the embodiment of the application are described in detail, and specific examples are applied to the description of the principle and the implementation of the application, and the description of the above embodiments is only used for helping to understand the technical scheme and the core idea of the application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (8)
1. The driving method of the display is characterized in that the backlight of the display comprises a power supply conversion unit, a light emitting unit and a driving unit, wherein the power supply conversion unit is electrically connected with the light emitting unit and the driving unit, the light emitting unit is electrically connected with the driving unit, the driving unit is used for detecting the voltage output by the light emitting unit and outputting a feedback voltage to the power supply conversion unit according to the voltage, and the power supply conversion unit is used for adjusting the driving voltage output by the power supply conversion unit according to the feedback voltage so as to drive the light emitting unit to emit light; the driving method of the display includes:
dividing a driving voltage range of the display into a plurality of voltage intervals, including: determining a number of resistances equal to the number of voltage intervals; dividing the driving voltage range by using the resistors to obtain a plurality of voltage intervals with equal length, wherein each resistor is electrically connected with one switching transistor and is connected to a feedback voltage node of the driving unit through the corresponding switching transistor;
detecting the current feedback voltage of the display;
determining a target feedback voltage according to the voltage intervals and the current feedback voltage, including: comparing the current feedback voltage with each endpoint value of the voltage intervals in sequence according to a preset sequence until the voltage interval where the current feedback voltage is located is determined; determining a target endpoint value of a voltage interval in which the current feedback voltage is located as a target feedback voltage;
determining a target driving voltage of the display according to the target feedback voltage to avoid false triggering of open-circuit protection caused by gradual rising of a power supply voltage of the display, including: and after the target feedback voltage is determined, modulating the target driving voltage in a step-by-step voltage regulation mode.
2. The driving method of a display according to claim 1, wherein dividing the driving voltage range of the display into a plurality of voltage intervals comprises:
determining a driving voltage range of the display;
and equally dividing the driving voltage range of the display to obtain a plurality of voltage intervals with equal lengths.
3. The method of driving a display according to claim 2, wherein determining a driving voltage range of the display comprises:
determining a maximum brightness and a minimum brightness of the display;
determining a maximum value of a driving voltage corresponding to the maximum brightness according to the maximum brightness;
determining a minimum value of the driving voltage corresponding to the minimum brightness according to the minimum brightness;
and determining a driving voltage range according to the maximum value of the driving voltage and the minimum value of the driving voltage.
4. The method of driving a display according to claim 1, wherein detecting a current feedback voltage of the display comprises:
and adjusting the initial feedback voltage according to the preset feedback voltage step length to obtain the current feedback voltage of the display.
5. The method of driving a display according to claim 1, wherein sequentially comparing the current feedback voltage with the respective end values of the plurality of voltage intervals in a preset order until a voltage interval in which the current feedback voltage is located is determined, comprising:
arranging the end values of the voltage intervals according to the sizes;
and comparing the current feedback voltage with the endpoint value positioned in the middle preferentially, and gradually determining the voltage interval in which the current feedback voltage is positioned.
6. The method of driving a display according to claim 1, wherein determining a target end point value of a voltage interval in which the current feedback voltage is located as the target feedback voltage comprises:
determining any one endpoint value of a voltage interval in which the current feedback voltage is located as the target endpoint value;
and determining the target endpoint value as a target feedback voltage.
7. The method of driving a display according to claim 1, wherein determining a target driving voltage of the display from the target feedback voltage comprises:
determining an input power supply voltage for the display;
and determining a target driving voltage of the display according to the input power supply voltage and the target feedback voltage.
8. A display, characterized in that the display is applied to a driving method of the display according to any one of claims 1 to 7, the display comprising:
the driving voltage dividing module is electrically connected with the detection module and is used for dividing the driving voltage range of the display into a plurality of voltage intervals, and the driving voltage dividing module comprises: determining a number of resistances equal to the number of voltage intervals; dividing the driving voltage range by using the resistors to obtain a plurality of voltage intervals with equal length, wherein each resistor is electrically connected with one switching transistor and is connected to a feedback voltage node of the driving unit through the corresponding switching transistor;
the detection module is electrically connected with the driving voltage dividing module and the target feedback voltage determining module and is used for detecting the current feedback voltage of the display;
the target feedback voltage determining module is electrically connected with the detecting module and the target driving voltage determining module, and is used for determining target feedback voltage according to the voltage intervals and the current feedback voltage, and comprises the following components: comparing the current feedback voltage with each endpoint value of the voltage intervals in sequence according to a preset sequence until the voltage interval where the current feedback voltage is located is determined; determining a target endpoint value of a voltage interval in which the current feedback voltage is located as a target feedback voltage;
the target driving voltage determining module is electrically connected with the target feedback voltage determining module, and is used for determining the target driving voltage of the display according to the target feedback voltage so as to avoid false triggering of open circuit protection caused by gradual rising of the power supply voltage of the display, and comprises the following steps: and after the target feedback voltage is determined, modulating the target driving voltage in a step-by-step voltage regulation mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210001598.0A CN114360447B (en) | 2022-01-04 | 2022-01-04 | Display driving method and display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210001598.0A CN114360447B (en) | 2022-01-04 | 2022-01-04 | Display driving method and display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114360447A CN114360447A (en) | 2022-04-15 |
| CN114360447B true CN114360447B (en) | 2023-11-28 |
Family
ID=81104864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210001598.0A Active CN114360447B (en) | 2022-01-04 | 2022-01-04 | Display driving method and display |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114360447B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117037726B (en) * | 2023-08-24 | 2024-05-28 | 北京显芯科技有限公司 | Light-emitting substrate, driving method thereof and display device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101207958A (en) * | 2006-12-18 | 2008-06-25 | 广鹏科技股份有限公司 | Driving circuit and related driving method for providing feedback control and open-circuit protection |
| CN102136252A (en) * | 2010-01-25 | 2011-07-27 | 三星电子株式会社 | Backlight assembly and display apparatus having the same |
| CN102779489A (en) * | 2011-05-11 | 2012-11-14 | 珠海格力电器股份有限公司 | Method and device for controlling voltage of LCD (liquid crystal display) based on ladder resistance network |
| KR20180078852A (en) * | 2016-12-30 | 2018-07-10 | 엘지디스플레이 주식회사 | Orgainc emitting diode display device |
| CN112820243A (en) * | 2019-10-31 | 2021-05-18 | 荣耀终端有限公司 | Backlight control circuit, control method thereof and display terminal |
| CN112908256A (en) * | 2021-02-24 | 2021-06-04 | Tcl华星光电技术有限公司 | Display panel driving method, display device and driving device |
| CN112992080A (en) * | 2021-02-09 | 2021-06-18 | 海信视像科技股份有限公司 | Display device and protection method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5523917B2 (en) * | 2010-04-23 | 2014-06-18 | ローム株式会社 | Switching power supply control circuit, control method, and light emitting device and electronic apparatus using them |
| CN103606354B (en) * | 2013-11-25 | 2016-04-13 | 深圳市华星光电技术有限公司 | Led backlight drive circuit and liquid crystal display |
| KR102241848B1 (en) * | 2014-08-12 | 2021-04-20 | 삼성디스플레이 주식회사 | Power supply device and Organic light emitting display apparatus comprising the power supply device |
-
2022
- 2022-01-04 CN CN202210001598.0A patent/CN114360447B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101207958A (en) * | 2006-12-18 | 2008-06-25 | 广鹏科技股份有限公司 | Driving circuit and related driving method for providing feedback control and open-circuit protection |
| CN102136252A (en) * | 2010-01-25 | 2011-07-27 | 三星电子株式会社 | Backlight assembly and display apparatus having the same |
| CN102779489A (en) * | 2011-05-11 | 2012-11-14 | 珠海格力电器股份有限公司 | Method and device for controlling voltage of LCD (liquid crystal display) based on ladder resistance network |
| KR20180078852A (en) * | 2016-12-30 | 2018-07-10 | 엘지디스플레이 주식회사 | Orgainc emitting diode display device |
| CN112820243A (en) * | 2019-10-31 | 2021-05-18 | 荣耀终端有限公司 | Backlight control circuit, control method thereof and display terminal |
| CN112992080A (en) * | 2021-02-09 | 2021-06-18 | 海信视像科技股份有限公司 | Display device and protection method thereof |
| CN112908256A (en) * | 2021-02-24 | 2021-06-04 | Tcl华星光电技术有限公司 | Display panel driving method, display device and driving device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114360447A (en) | 2022-04-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI419100B (en) | A lighting device for use in a backlight for a display and a method for producing a light source for use as a backlight | |
| US8896516B2 (en) | Light emission control circuit, light emission control method, flat illuminating device, and liquid crystal display device having the same device | |
| US8330393B2 (en) | System for time-sequential LED-string excitation | |
| CN101340758B (en) | Control device and control method, and planar light source and control method of planar light source | |
| US7888888B2 (en) | Light source apparatus and driving apparatus thereof | |
| US7564434B2 (en) | Light emitting diode driving circuit for backlight having constant current control function | |
| US7425728B2 (en) | Surface light source control device | |
| US20090261743A1 (en) | Light emitting diode driving module | |
| KR101121901B1 (en) | Control circuit and method for controlling leds | |
| JP7203155B2 (en) | backlight device for display | |
| US10743380B2 (en) | Light emitting diode driving device and light emitting diode backlight module | |
| CN102088808A (en) | Contact current LED driving circuit of snap switch | |
| JPWO2004064030A1 (en) | Display device and control method thereof | |
| CN114360447B (en) | Display driving method and display | |
| US9136758B2 (en) | Voltage converting LED circuit with switched capacitor network | |
| JP2009157190A (en) | Light source system, light source control device, light source device, and image display method | |
| US20070001942A1 (en) | Display screen comprising a plurality of cells | |
| US8008870B2 (en) | Constant-current drive circuit | |
| KR20080032440A (en) | Apparatus and method of driving backlight | |
| US20070252806A1 (en) | Drive structure for a sequential rgb display | |
| US8054284B2 (en) | Back light module and driving method thereof | |
| KR101306522B1 (en) | Led current driving circuit | |
| US10909932B2 (en) | Display apparatus and method of driving display panel using the same | |
| KR20040028423A (en) | Driving apparatus for display device | |
| CN115035837A (en) | Lamp panel, control method thereof and display panel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |