CN110060628A - Display driving method and device, driving chip and display device - Google Patents
Display driving method and device, driving chip and display device Download PDFInfo
- Publication number
- CN110060628A CN110060628A CN201910309260.XA CN201910309260A CN110060628A CN 110060628 A CN110060628 A CN 110060628A CN 201910309260 A CN201910309260 A CN 201910309260A CN 110060628 A CN110060628 A CN 110060628A
- Authority
- CN
- China
- Prior art keywords
- control signal
- signal
- value
- potential
- circuit
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000001514 detection method Methods 0.000 claims abstract description 74
- 230000003068 static effect Effects 0.000 claims abstract description 21
- 238000012545 processing Methods 0.000 claims description 50
- 230000015654 memory Effects 0.000 claims description 32
- 238000005070 sampling Methods 0.000 claims description 31
- 230000005540 biological transmission Effects 0.000 claims description 30
- 239000003990 capacitor Substances 0.000 claims description 19
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 13
- 230000000630 rising effect Effects 0.000 description 12
- 230000000694 effects Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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]
-
- 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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a display driving method and device, a driving chip and a display device, belongs to the technical field of display, and is used for reducing the power consumption of the driving chip and a display panel. The method comprises the following steps: in each set detection period, determining whether the potential of a control signal sent by a processor jumps or not; if the potential of the control signal is determined not to jump in the current detection period, determining that the type of the picture output to the display panel for displaying is a static picture, and determining that the value of the screen swiping frequency parameter is a first frequency value; or if the potential of the control signal is determined to jump in the current detection period, determining that the type of the picture output to the display panel for displaying is a dynamic picture, and determining that the value of the screen refreshing frequency parameter is a second frequency value; wherein the first frequency value is less than the second frequency value; and outputting the image data to be displayed to the display panel for displaying based on the determined value of the screen swiping frequency parameter.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display driving method and device, a driving chip and a display device.
Background
At present, with the development of display technology, the size of display devices is gradually increased, for example, for the field of mobile phone display, the size of mobile phone screens is also developed from below 1 inch to 5 inches, 6 inches or even larger nowadays. In the display device, the processor (Host) needs to continuously output video image data to a Driver IC (Driver IC) through a transmission interface, and the Driver IC outputs the received image data to a display panel (panel) to display an image.
However, the power consumption of the display device is extremely consumed in the process of refreshing the screen, and especially under the market prospect of the currently popular large-size display device, the power consumption of the display device is increased, so how to reduce the power consumption of the display device is a technical problem to be solved urgently.
Disclosure of Invention
The embodiment of the invention provides a display driving method, a display driving device, a driving chip and display equipment, which are used for reducing the power consumption of the driving chip and a display panel.
In a first aspect, a display driving method is provided, the method including:
in each set detection period, determining whether the potential of a control signal sent by a processor jumps or not;
if the potential of the control signal is determined not to jump in the current detection period, determining that the type of the picture output to the display panel for displaying is a static picture, and determining that the value of the screen swiping frequency parameter is a first frequency value; or,
if the potential of the control signal is determined to jump in the current detection period, determining that the type of the picture output to the display panel for displaying is a dynamic picture, and determining that the value of the screen refreshing frequency parameter is a second frequency value; wherein the first frequency value is less than the second frequency value;
and outputting the image data to be displayed to the display panel for displaying based on the determined value of the screen swiping frequency parameter.
Optionally, the method further includes:
receiving the control signal and a data signal sent by the processor;
sampling the data signal under the direction of the control signal, and,
and updating the image data to be displayed stored in the memory by sampling the acquired image data.
Optionally, the updating, under the instruction of the control signal, the image data stored in the memory by sampling the acquired image data includes:
and when the control signal jumps from the first potential to the second potential, updating the image data stored in the memory by the image data sampled within a preset time length range after the jump time.
Optionally, the detection period is a signal period when the control signal indicates that the picture type output to the display panel for displaying is a dynamic picture.
In a second aspect, there is provided a display driving apparatus, the apparatus comprising:
the monitoring unit is used for determining whether the potential of the control signal sent by the processor jumps or not in each set detection period;
the determining unit is used for determining that the type of the picture output to the display panel for displaying is a static picture and determining that the value of the screen refreshing frequency parameter is a first frequency value if the potential of the control signal is determined not to jump in the current detection period; or if the potential of the control signal is determined to jump in the current detection period, determining that the type of the picture output to the display panel for displaying is a dynamic picture, and determining that the value of the screen refreshing frequency parameter is a second frequency value; wherein the first frequency value is less than the second frequency value;
and the output unit is used for outputting the image data to be displayed to the display panel for displaying based on the determined value of the screen swiping frequency parameter.
Optionally, the apparatus further comprises a sampling unit for;
receiving the control signal and a data signal sent by the processor; and,
and under the instruction of the control signal, sampling the data signal, and updating the image data to be displayed stored in the memory by sampling the acquired image data.
Optionally, the sampling unit is specifically configured to:
and when the control signal jumps from the first potential to the second potential, updating the image data stored in the memory by the image data sampled within a preset time length range after the jump time.
Optionally, the detection period is a signal period when the control signal indicates that the picture type output to the display panel for displaying is a dynamic picture.
In a third aspect, a driving chip is provided, where the driving chip includes a transmission interface, a signal detection circuit, and a frame frequency processing circuit;
the transmission interface is in signal connection with the processor and receives a control signal sent by the processor;
the input end of the signal detection circuit is connected with the transmission interface and is used for determining whether the potential of the control signal jumps in each set detection period and outputting a determination result to the frame frequency processing circuit;
the frame frequency processing circuit determines a value of a screen swiping frequency parameter according to the determination result, and outputs image data to be displayed to the display panel for displaying based on the determined value of the screen swiping frequency parameter;
if the determination result indicates that the potential of the control signal does not jump in the current detection period, the frame frequency processing circuit determines that the value of the screen refreshing frequency parameter is a first frequency value; or, if the determination result indicates that the potential of the control signal jumps in the current detection period, the frame frequency processing circuit determines that the value of the screen swiping frequency parameter is a second frequency value larger than the first frequency value.
Optionally, the driving chip further includes a data processing circuit and a memory;
the transmission interface also receives the data signal sent by the processor while receiving the control signal;
the input end of the data processing circuit is connected with the transmission interface and is used for sampling the data signal under the control of the control signal and storing image data acquired by sampling into the memory.
Optionally, the signal detection circuit includes an integrating sub-circuit and a voltage comparison sub-circuit;
after the integrating circuit carries out time delay processing on the control signal in the current detection period to obtain an intermediate signal, the voltage comparison sub-circuit compares the intermediate signal with a reference signal to determine whether the potential of the control signal in the current detection period jumps or not;
when the control signal in the current detection period is a constant voltage signal, the amplitude of the intermediate signal is greater than the reference signal, the voltage comparison sub-circuit outputs a first level, and it is determined that the potential of the control signal does not jump; or,
when the control signal in the current detection period is a non-constant voltage signal, the maximum value of the amplitude of the intermediate signal is smaller than the reference signal, the voltage comparison sub-circuit outputs a second level, and the potential of the control signal is determined to jump.
Optionally, the integrating sub-circuit includes a first resistor and a first capacitor;
the first end of the first resistor is connected with the transmission interface, the second end of the first resistor is connected with the first end of the first capacitor, and the first end and the second end of the first capacitor are respectively connected with the input end of the voltage comparison sub-circuit.
Optionally, the integrating sub-circuit further includes a diode connected in parallel with the first resistor;
and the anode of the diode is connected with the second end of the first resistor, and the cathode of the diode is connected with the first end of the first resistor.
Optionally, the voltage comparison sub-circuit includes a voltage comparator, a second resistor and a third resistor;
the first input end of the voltage comparator is connected with the first output end of the integrating sub-circuit and the first end of the second resistor, the second input end of the voltage comparator is connected with the first end of the third resistor, the output end of the voltage comparator is connected with the frame frequency processing circuit, the second end of the second resistor is connected with a power supply end, and the second end of the third resistor is connected with the second output end of the integrating circuit and a reference voltage end.
Optionally, the transmission interface is a CPU interface, an RGB interface, or an SPI interface.
In a fourth aspect, a display device is provided, which includes a display panel and the driving chip of the third aspect.
The invention has the following beneficial effects:
in the display driving method, the display driving device, the driving chip and the display device provided by the embodiment of the invention, the type of the picture output to the display panel for display is judged by detecting the jump of the potential of the control signal, so that the corresponding screen refreshing frequency value is determined, wherein when the picture type is a static picture, the screen refreshing frequency can be reduced, and the screen refreshing frequency is reduced, and when the picture type is a dynamic picture, the screen refreshing frequency higher than the static picture can be used, so that the power consumption of the display device is reduced while the display effect is ensured.
Drawings
Fig. 1 is a schematic structural diagram of a driving chip according to an embodiment of the present invention;
fig. 2 is another schematic structural diagram of a driving chip according to an embodiment of the present invention;
FIG. 3 is a waveform diagram of a WRX signal provided by an embodiment of the present invention;
fig. 4 is a circuit diagram of a signal detection circuit according to an embodiment of the present invention;
FIG. 5 shows an input signal U according to an embodiment of the present inventioniIntermediate signal U when being square waveaA schematic diagram of (a);
FIG. 6 shows an input signal U according to an embodiment of the present inventioniIntermediate signal U when maintaining high levelaA schematic diagram of (a);
fig. 7 is a schematic flowchart of a display driving method according to an embodiment of the invention;
fig. 8 is a schematic structural diagram of a display driving apparatus according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
At present, with the development of display technology, the size of display devices is gradually increased, for example, for the field of mobile phone display, the size of mobile phone screens is also developed from below 1 inch to 5 inches, 6 inches or even larger nowadays. In the display device, the processor needs to output video image data to the driving chip continuously through the transmission interface, and the driving chip outputs the received image data to the display panel to realize the display of the image. The power consumption of the display device is greatly consumed in the process of refreshing the screen, and especially under the market prospect of the current common large-size display device, the power consumption of the display device is correspondingly increased, so how to reduce the power consumption of the display device is a technical problem to be urgently solved.
The embodiment of the invention provides a display driving method, a display driving device, a driving chip and display equipment, and aims to solve the problem that the power consumption of the existing display device is large.
In order to make the objects, technical solutions and advantages of the present invention clearer, specific embodiments of a display driving method, a display driving device, a driving chip and a display device according to an embodiment of the present invention are described in detail below with reference to the accompanying drawings. It should be understood that the preferred embodiments described below are only for illustrating and explaining the present invention and are not to be used for limiting the present invention. And the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a Driver IC 20 according to an embodiment of the present invention, where the Driver IC 20 includes a transmission interface 201, a signal detection circuit 202, and a frame rate processing circuit 203;
the transmission interface 201 is in signal connection with the processor 10 and receives a control signal sent by the processor 10;
the input end of the signal detection circuit 202 is connected to the transmission interface 201, and is configured to determine whether a potential of the control signal jumps within each set detection period, and output a determination result to the frame frequency processing circuit 203;
the frame frequency processing circuit 203 determines the value of the screen swiping frequency parameter according to the determination result, and outputs the image data to be displayed to the display panel 30 for displaying based on the determined value of the screen swiping frequency parameter;
if the determination result indicates that the potential of the control signal does not jump in the current detection period, the frame frequency processing circuit 203 determines that the value of the screen refreshing frequency parameter is a first frequency value; or, if the determination result indicates that the potential of the control signal jumps in the current detection period, the frame frequency processing circuit 203 determines that the value of the screen swiping frequency parameter is a second frequency value larger than the first frequency value.
The driving chip provided in the embodiment of the present invention determines the type of the picture output to the display panel 30 by detecting the jump of the potential of the control signal through the signal detection circuit 202, so as to determine the corresponding screen refreshing frequency value, wherein when the picture type is a static picture, the screen refreshing frequency can be reduced, and when the picture type is a dynamic picture, the screen refreshing frequency higher than the static picture can be used, so that the power consumption of the display device can be reduced while the display effect is ensured.
For example, when the picture type is a dynamic picture, in order to ensure the display effect, that is, when the user watches the picture without frame skipping, the screen refreshing frequency corresponding to the dynamic picture may be set to a higher value, for example, 60Hz, and when the picture type is a static picture, because the static picture does not need to be updated quickly, if the screen refreshing is performed at a lower frame frequency without affecting the display effect, for example, when the user views a picture, the image content does not change, the screen refreshing may be performed at a lower frame frequency, for example, the screen refreshing frequency may be set to 1Hz or 2Hz, and thus, the number of screen refreshing times of the display device during displaying the static picture can be reduced, and the power consumption of the display device can be reduced without affecting the display effect.
In the embodiment of the present invention, when the frame rate processing circuit 203 outputs the image data to the display panel 30, the image data may be processed by necessary circuits, for example, the image data is usually binary data, and when the image data is output to the display panel, digital-to-analog conversion is required, that is, the image data is converted into an analog signal and then output, and then necessary digital-to-analog conversion is required, and a boost amplifying circuit and the like are further required, so that a gate (gate) signal, a source (source) signal, a common mode (Vcom) signal, and the like are finally output to the display panel.
In the above-mentioned driver chip 20 provided in the embodiment of the present invention, as shown in fig. 2, fig. 2 is another schematic structural diagram of the driver chip 20 provided in the embodiment of the present invention, where the driver chip 20 further includes a data processing circuit 204 and a memory 205, and the memory 205 may be, for example, a Random Access Memory (RAM), and of course, may be other possible memories, which is not limited in this embodiment of the present invention.
In general, the processor 10 transmits a data signal to the driving chip 20 in addition to a control signal to the driving chip 20, the data signal is used for carrying image data to be displayed, and the control signal is used for controlling sampling of the data signal. The transmission interface 201 in the driver chip 20 receives the control signal and also receives the data signal sent by the processor 10. Specifically, the transmission interface 201 may include a plurality of sub-interfaces for receiving or transmitting different signals, and the data signal and the control signal may be transmitted through different sub-interfaces.
Wherein, the input terminal of the data processing circuit 204 is connected to the transmission interface 201, so that the data processing circuit 204 can obtain the control signal and the data signal from the transmission interface 201, thereby sampling the data signal under the control of the control signal, and storing the image data obtained by sampling into the memory 205. For example, the data processing circuit 204 may start sampling the data signal when the control signal is at a rising edge or a falling edge, and how the control signal indicates the sampling may depend on a specific control signal, which is not limited in the embodiment of the present invention.
In the embodiment of the present invention, the data processing circuit 204 and the signal detecting circuit 202 receive the control signal synchronously, that is, after the transmission interface 201 obtains the control signal, the control signal is synchronously provided to the data processing circuit 204 and the signal detecting circuit 202 for processing, the data processing circuit 204 samples the data signal based on the indication of the control signal and stores the data signal in the memory 205, and at the same time, the signal detecting circuit 202 detects the control signal, so as to output the result of whether the control signal is hopped to the frame frequency processing circuit 203, and the frame frequency processing circuit 203 determines the screen refreshing frequency based on the result of whether the control signal is hopped, and outputs the image data stored in the memory 205 to the display panel for displaying according to the determined screen refreshing frequency.
Specifically, the data processing circuit 204 may include a logic control sub-circuit and a sampling sub-circuit, where the logic control sub-circuit may analyze the control signal, and then control the sampling sub-circuit to sample based on an indication of the control signal, and of course, the data processing circuit 204 may further include other possible sub-circuits, which is not limited in this embodiment of the present invention.
In this embodiment of the present invention, the transmission Interface 201 may be a Central Processing Unit (CPU) Interface, a red, green, blue (RGB) Interface, or a Serial Peripheral Interface (SPI). Correspondingly, when different transmission interfaces are adopted, the control signal may also change accordingly, for example, when the transmission interface 201 is a CPU interface, the control signal may be a Write enable (Write enable) signal, or WRX signal; alternatively, when the transmission interface 201 is an RGB interface, the control signal may be a Vertical Synchronization (VSYNC) signal; or when the transmission interface 201 is an SPI interface, the control signal may be a Serial Clock Line (SCL) signal.
The sampling of the data signal will be described below using the WRX signal as an example. For the WRX signal, the WRX signal is typically triggered to sample on the rising edge and is held high at idle times, as shown in FIG. 3, which is a waveform diagram of the WRX signal, where at A, B and C the WRX signal is a square wave, and the sample on the rising edge of the square wave is used to write the image data into the memory 205, i.e., the dynamic picture at this time. The amplified signal shown in fig. 3 is an amplified signal of the WRX signal at C, and it can be clearly seen that the amplified signal is a square wave signal with a period of N, in the amplified signal, a rising edge of the signal can be clearly seen, and at the rising edge, the data processing circuit 204 is triggered to sample, which is equivalent to that the rising edge is a trigger signal for indicating that the data signal transmitted from the time to the preset time range away from the time is a valid data signal, and needs to be sampled to obtain image data therefrom, and store the obtained image data in the memory 205. For example, the preset time length range may be set as the time length range from the rising edge to the next falling edge, that is, at the rising edge position, the data processing circuit 204 starts sampling and storing the image data, and at the falling edge position, the data processing circuit 204 stops storing, and between the falling edge and the next rising edge, the data may be used for transmitting some invalid data, such as a preparation flag or a stop flag, which is mainly used for guiding the sampling, and is not used for the display of the display panel 30, so that the data may not be stored in the memory 205.
As shown in fig. 3, the WRX signal is maintained at a high level at d, e, f, and g, and no image data is written to the memory 205 at this time, i.e., a still picture at this time. Based on the waveform diagram shown in fig. 3, it can be known that the level of the control signal at the idle time kept in more than a certain time is not updated, that is, the picture type is a static picture, otherwise, the picture is a dynamic picture, and it is substantially only necessary to detect whether the level of the control signal at the idle time is greater than a preset time period to determine the picture type, for example, for a WRX signal, it can be determined whether the control signal jumps in a detection period, and if the control signal does not jump, that is, the time of the control signal being maintained at a high level is greater than N, the picture type can be determined to be a static picture, otherwise, the picture is a dynamic picture.
In the above-mentioned driving chip 20 provided by the embodiment of the present invention, as shown in the figureFig. 4 is a circuit diagram of the signal detection circuit 202 according to the embodiment of the invention. The signal detection circuit 202 may include an integrating sub-circuit 2021 and a voltage comparison sub-circuit 2022, wherein an input terminal of the integrating sub-circuit 2021 is an input terminal of the signal detection circuit 202 to obtain a control signal in a current detection period, i.e. an input signal U input to the integrating sub-circuit 2021iIs a control signal, and carries out time delay processing on the control signal in the current detection period to obtain an intermediate signal UaThen intermediate signal U is addedaOutput to the voltage comparator circuit 2022, the voltage comparator circuit 2022 outputs the intermediate signal UaAnd comparing with the reference signal Vref to determine whether the potential of the control signal in the current detection period jumps.
In particular, the integrating sub-circuit 2021 may include a first resistor R1And a first capacitor C1The first end of the first resistor R1 is connected to the transmission interface 201, and the second end is connected to the first capacitor C1Is connected to a first terminal of a first capacitor C1Is connected to one of the input terminals of the voltage comparison sub-circuit 2022, a first capacitor C1Is connected to the reference voltage terminal.
As shown in FIG. 5, FIG. 5 shows an input signal UiIntermediate signal U when being square waveaWherein when the signal U is inputiAt rising edge, the first capacitor C1Start of charging, intermediate signal UaAmplitude of and the first capacitance C1The voltages at both ends have the same amplitude and thus follow the first capacitor C1Charging of, intermediate signal UaUntil the input signal U is increasediAt falling edge, the first capacitor C1Start of discharge, intermediate signal UaGradually decreases until the next rising edge increases again, i.e. when the input signal U is presentiIn the case of square waves, the intermediate signal UaA waveform similar to a triangular wave.
As shown in FIG. 6, FIG. 6 shows an input signal UiIntermediate signal U when maintaining high levelaWhen inputtingSignal UiWhen the first capacitor C is continuously at a high level1After the charging is completed, the first capacitor C1The voltage at both ends will not change, so the intermediate signal UaIs also maintained at a high level and does not change.
With continued reference to fig. 4, the integrating sub-circuit 2021 may further include a first resistor R1Parallel diode D1Diode D1Is connected to a second terminal of the first resistor R1 and has a cathode connected to a first terminal of the first resistor R1. Diode D1For assisting the first capacitance C1And discharging is performed.
The voltage comparison sub-circuit 2022 may include a voltage comparator U1A second resistor R2And a third resistor R3Wherein the voltage comparator U1And the output end of the integrating sub-circuit 2021 and the third resistor R3Is connected to a voltage comparator U1Second input terminal and second resistor R2Is connected to a voltage comparator U1Is connected to the frame rate processing circuit 203, and a third resistor R3A second terminal of the first resistor R is connected with a power supply end, and a second resistor R is connected with a power supply end2Is connected to the reference voltage terminal GND.
The power supply terminal can be an IOVCC pin of the driver chip, i.e., a digital interface power supply pin, and generally speaking, the magnitude and U of the voltage provided by the IOVCC piniEquivalently, the reference signal Vref is set by the second resistor R2And a third resistor R3The magnitude of the reference signal Vref can be calculated by the following formula:
Vref＝(IOVCC*R2)/(R2+R3)
thus, by adjusting the second resistance R2And a third resistor R3The reference signal Vref can be adjusted to a suitable fixed value.
In the embodiment of the invention, the control signal in the current detection period is a constant voltage signalWhen the signal is high, for example, as shown in FIG. 6, the intermediate signal U is assertedaThe amplitude of the voltage comparison sub-circuit 2022 is greater than the reference signal Vref, and the voltage comparison sub-circuit 2022 outputs a first level, so that it can be determined that the potential of the control signal does not jump; when the control signal in the current detection period is a non-constant voltage signal, such as a square wave signal shown in fig. 5, the intermediate signal U isaThe maximum value of the amplitude of (d) is smaller than the reference signal Vref, and the voltage comparison sub-circuit 2022 outputs the second level, it can be determined that the potential of the control signal jumps.
In particular, the intermediate signal UaThe maximum value of the amplitude is determined by the delay time of the integrating sub-circuit 2021, the first resistor R1 and the first capacitor C1In relation to the fact that the delay time is equal to R1 × C1, if the delay time is longer, the maximum value of Ua is smaller, so that the first resistor R1 and the first capacitor C can be selected appropriately1And adjusting the second resistance R2And a third resistor R3Such that when the signal U is inputiIn the case of square waves, the intermediate signal UaIs smaller than the amplitude of the reference signal Vref, then when the input signal U is presentiWhen square wave, the voltage comparator U1Output signal U ofoIs low, when the input signal U isiWhile maintaining the high level in the detection period, the intermediate signal UaIs greater than the amplitude of the reference signal Vref, a voltage comparator U1Output signal U ofoThen it is at a first level, where the first level is high, so that it is possible to compare the voltage with the voltage comparator U1Output signal U ofoLevel of (3) judging input signal UiAnd whether jumping occurs or not is judged, and then the screen refreshing frequency is determined. Of course, in the intermediate signal UaOutput signal U after being exchanged with the input terminal of reference signal VrefoIs changed accordingly, namely the intermediate signal U is input through the second input terminalaAnd when the reference signal Vref is input through the first input terminal, if it is the input signal UiIs a square wave, then outputs a signal UoThen it is high and the input signal U isiWhen the high level is maintained, the signal U is outputoThen it is low.
In the embodiment of the invention, the signal detection circuit 202 can output the signal UoOutput to frame rate processing circuit 203 so that frame rate processing circuit 203 can be responsive to output signal UoAnd setting a screen refreshing frequency so as to output the image data to the display panel for display according to the set screen refreshing frequency.
In this embodiment of the present invention, the driving chip may be an IC that includes a Timer control register (TCON) therein, that is, an IC that can output a timing sequence, and the common ICs that include the TCON include an IC that includes a gate (gate) line, a data (source) line and the TCON, an IC that includes a data line (source) and the TCON, and an IC that only includes the TCON.
Next, a display driving method provided by an embodiment of the present invention is described with reference to the above driving chip, and please refer to fig. 7, which is a schematic flow chart of the display driving method provided by the embodiment of the present invention.
Step 701: and in each set detection period, determining whether the potential of the control signal sent by the processor jumps or not.
In this embodiment of the present invention, the length of the detection period may be set to a transition period of a square wave in a signal period when the control signal indicates that the picture type output to the display panel for displaying is a dynamic picture, that is, a period N shown in fig. 3, and of course, the detection period may also be set to another value, for example, may be set to 2N, and the embodiment of the present invention is not limited thereto.
Specifically, the determination of whether the potential of the control signal sent by the processor jumps or not may be performed by a signal detection circuit in the driver chip, and since the above description describes the principle that the signal detection circuit determines whether the potential jumps or not, the description thereof is omitted here.
Step 702: if the determination result in the step 701 is negative, it is determined that the type of the picture output to the display panel for displaying is a static picture, and the value of the screen swiping frequency parameter is determined to be the first frequency value.
In the embodiment of the present invention, if it is determined that the potential of the control signal does not jump, for example, the control signal is taken as a WRX signal, that is, the control signal does not change in the detection period, for the WRX signal, it may be determined that the waveform is maintained at a high level in the current detection period without change, and the type of the picture corresponding to the high level is a static picture, and then it may be determined that the value of the screen swiping frequency parameter is a first frequency value corresponding to the static picture.
In a specific application, taking the signal detection circuit shown in fig. 4 as an example, when the output signal of the signal detection circuit is at a high level, the frame frequency processing circuit may set the value of the screen swiping frequency parameter to be the first frequency value.
Step 703: if the determination result in the step 702 is yes, it is determined that the type of the picture output to the display panel for displaying is a dynamic picture, and the value of the screen swiping frequency parameter is determined to be the second frequency value.
In the embodiment of the present invention, if it is determined that the potential of the control signal jumps, the control signal is also taken as the WRX signal as an example, that is, the control signal changes in the detection period, then for the WRX signal, it may be determined that the waveform in the current detection period is a square wave, and the type of the picture corresponding to the square wave is a dynamic picture, and then it may be determined that the value of the swiping frequency parameter is the second frequency value corresponding to the dynamic picture. Generally, to ensure the display effect of the dynamic image, the second frequency value corresponding to the dynamic image is generally greater than the first frequency value corresponding to the static image.
In a specific application, when the output signal of the signal detection circuit is at a low level, the frame frequency processing circuit may determine that the picture type in the current detection period is a dynamic picture, and may set the value of the screen swiping frequency parameter to be the second frequency value.
Step 704: and outputting the image data to be displayed to the display panel for displaying based on the determined value of the screen swiping frequency parameter.
In the embodiment of the invention, after the value of the screen swiping frequency parameter is determined, the frame frequency processing circuit outputs the image data to be displayed to the display panel for displaying according to the determined screen swiping frequency value. Specifically, the memory is used for storing image data, generally speaking, the memory is used for storing image data of one frame, and when the image data needs to be output to the display panel for display, the image data can be read from the memory and output to the display panel. For example, when the set screen-swiping frequency is 60Hz, i.e. 60 times per second, the frame rate processing circuit will read the image data from the memory and output it to the display panel when the next screen-swiping time arrives.
In the embodiment of the invention, the image data stored in the memory is obtained by sampling of the data processing circuit. The driving chip receives the control signal and also receives a data signal sent by the processor, so that the data signal is sampled under the instruction of the control signal, and the image data to be displayed stored in the memory is updated through the image data obtained by sampling. Specifically, when the control signal jumps from the first potential to the second potential, the image data stored in the memory is updated by the image data sampled within a preset time duration after the jump time, and in the case of the WRX signal, the image data collected by the data processing circuit is stored in the memory when the level changes from low to high, i.e., at a rising edge.
Since the process of the method is substantially already described when the driver chip is described, reference may be made to the description of the driver chip portion for the process of the method, and redundant description is not repeated here.
In the embodiment of the present invention, the detection period is a signal period when the control signal indicates that the type of the picture output to the display panel for displaying is a dynamic picture.
Referring to fig. 8, based on the same inventive concept, an embodiment of the present invention further provides a display driving apparatus 80, which may be, for example, the driving chip described above, and the apparatus includes:
a monitoring unit 801, configured to determine whether a potential of a control signal sent by the processor jumps in each set detection period;
a determining unit 802, configured to determine that a picture type output to the display panel for displaying is a static picture and determine that a value of the screen swiping frequency parameter is a first frequency value if it is determined that the potential of the control signal does not jump within the current detection period; or if the potential of the control signal is determined to jump in the current detection period, determining that the type of the picture output to the display panel for displaying is a dynamic picture, and determining that the value of the screen refreshing frequency parameter is a second frequency value; wherein the first frequency value is less than the second frequency value;
and an output unit 803, configured to output, to the display panel, the image data to be displayed for display based on the determined value of the screen swiping frequency parameter.
Optionally, the apparatus further includes a sampling unit 804, configured to:
receiving a data signal sent by a processor while receiving the control signal;
the data signal is sampled, as directed by the control signal, and,
the image data to be displayed stored in the memory is updated by sampling the acquired image data.
Optionally, the sampling unit 804 is specifically configured to:
when the control signal jumps from the first potential to the second potential, the image data stored in the memory is updated by the image data sampled within a preset time period after the jump timing.
Optionally, the detection period is a signal period when the control signal indicates that the picture type output to the display panel for displaying is a dynamic picture.
The apparatus may be configured to execute the method shown in the embodiment shown in fig. 7, and therefore, for functions and the like that can be realized by each functional module of the apparatus, reference may be made to the description of the embodiment shown in fig. 7, which is not repeated here. Although the sampling unit 804 is also shown in fig. 8, it should be noted that the sampling unit 804 is not an indispensable functional unit, and is shown by a dotted line in fig. 8.
Based on the same inventive concept, the embodiment of the invention further provides a display device, which comprises the driving chip and a display panel provided by the embodiment of the invention.
The principle of the display device to solve the problem is similar to the aforementioned driving chip, so the implementation of the display device can refer to the implementation of the aforementioned driving chip, and repeated details are not repeated here.
In a specific implementation, the display device provided In the embodiment of the present invention may be an Organic Light-Emitting Diode (OLED) device, and may also be a Liquid Crystal Display (LCD) device, for example, an LCD device using Twisted Nematic (TN) technology, Vertical Alignment (VA) technology, In-Plane Switching (IPS) technology, or Low Temperature Polysilicon (LTPS) technology, and the like, which is not limited herein.
In a specific implementation, the display device provided in the embodiment of the present invention may be a full-screen display device, or may also be a flexible display device, and is not limited herein.
In practical implementation, the display device provided by the embodiment of the present invention may be a full-screen mobile phone as shown in fig. 9. Of course, the display device provided in the embodiment of the present invention may also be any product or component having a display function, such as a tablet computer, a television, a display, a notebook computer, a digital photo frame, and a navigator. Other essential components of the display device are understood by those skilled in the art, and are not described herein or should not be construed as limiting the invention.
In the display driving method, the display driving device, the driving chip and the display device provided by the embodiment of the invention, the type of the picture output to the display panel for display is judged by detecting the jump of the potential of the control signal, so that the corresponding screen refreshing frequency value is determined, wherein when the picture type is a static picture, the screen refreshing frequency can be reduced, and the screen refreshing frequency is reduced, and when the picture type is a dynamic picture, the screen refreshing frequency higher than the static picture can be used, so that the power consumption of the display device is reduced while the display effect is ensured.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (13)
1. A display driving method, characterized in that the method comprises:
in each set detection period, determining whether the potential of a control signal sent by a processor jumps or not;
if the potential of the control signal is determined not to jump in the current detection period, determining that the type of the picture output to the display panel for displaying is a static picture, and determining that the value of the screen swiping frequency parameter is a first frequency value; or,
if the potential of the control signal is determined to jump in the current detection period, determining that the type of the picture output to the display panel for displaying is a dynamic picture, and determining that the value of the screen refreshing frequency parameter is a second frequency value; wherein the first frequency value is less than the second frequency value;
and outputting the image data to be displayed to the display panel for displaying based on the determined value of the screen swiping frequency parameter.
2. The display driving method according to claim 1, further comprising:
receiving the control signal and a data signal sent by the processor;
sampling the data signal under the direction of the control signal, and,
and updating the image data to be displayed stored in the memory by sampling the acquired image data.
3. The display driving method according to claim 2, wherein the updating of the image data stored in the memory by sampling the acquired image data under the instruction of the control signal comprises:
and when the control signal jumps from the first potential to the second potential, updating the image data stored in the memory by the image data sampled within a preset time length range after the jump time.
4. The display driving method according to any one of claims 1 to 3, wherein the detection period is a signal period of the control signal when a picture type instructed to be output to the display panel for display is a dynamic picture.
5. A display driving apparatus, characterized in that the apparatus comprises:
the monitoring unit is used for determining whether the potential of the control signal sent by the processor jumps or not in each set detection period;
the determining unit is used for determining that the type of the picture output to the display panel for displaying is a static picture and determining that the value of the screen refreshing frequency parameter is a first frequency value if the potential of the control signal is determined not to jump in the current detection period; or if the potential of the control signal is determined to jump in the current detection period, determining that the type of the picture output to the display panel for displaying is a dynamic picture, and determining that the value of the screen refreshing frequency parameter is a second frequency value; wherein the first frequency value is less than the second frequency value;
and the output unit is used for outputting the image data to be displayed to the display panel for displaying based on the determined value of the screen swiping frequency parameter.
6. A driving chip is characterized in that the driving chip comprises a transmission interface, a signal detection circuit and a frame frequency processing circuit;
the transmission interface is in signal connection with the processor and receives a control signal sent by the processor;
the input end of the signal detection circuit is connected with the transmission interface and is used for determining whether the potential of the control signal jumps in each set detection period and outputting a determination result to the frame frequency processing circuit;
the frame frequency processing circuit determines a value of a screen swiping frequency parameter according to the determination result, and outputs image data to be displayed to the display panel for displaying based on the determined value of the screen swiping frequency parameter;
if the determination result indicates that the potential of the control signal does not jump in the current detection period, the frame frequency processing circuit determines that the value of the screen refreshing frequency parameter is a first frequency value; or, if the determination result indicates that the potential of the control signal jumps in the current detection period, the frame frequency processing circuit determines that the value of the screen swiping frequency parameter is a second frequency value larger than the first frequency value.
7. The driver chip of claim 6, wherein the driver chip further comprises a data processing circuit and a memory;
the transmission interface also receives the data signal sent by the processor while receiving the control signal;
the input end of the data processing circuit is connected with the transmission interface and is used for sampling the data signal under the control of the control signal and storing image data acquired by sampling into the memory.
8. The driver chip of claim 6, wherein the signal detection circuit comprises an integrator sub-circuit and a voltage comparator sub-circuit;
after the integrating circuit carries out time delay processing on the control signal in the current detection period to obtain an intermediate signal, the voltage comparison sub-circuit compares the intermediate signal with a reference signal to determine whether the potential of the control signal in the current detection period jumps or not;
when the control signal in the current detection period is a constant voltage signal, the amplitude of the intermediate signal is greater than the reference signal, the voltage comparison sub-circuit outputs a first level, and it is determined that the potential of the control signal does not jump; or,
when the control signal in the current detection period is a non-constant voltage signal, the maximum value of the amplitude of the intermediate signal is smaller than the reference signal, the voltage comparison sub-circuit outputs a second level, and the potential of the control signal is determined to jump.
9. The driver chip of claim 8, wherein the integrator circuit includes a first resistor and a first capacitor;
the first end of the first resistor is connected with the transmission interface, the second end of the first resistor is connected with the first end of the first capacitor, the first end of the first capacitor is connected with one of the input ends of the voltage comparison sub-circuit, and the first end of the first capacitor is connected with one of the input ends of the voltage comparison sub-circuitA capacitor C1Is connected to the reference voltage terminal.
10. The driver chip of claim 9, wherein the integrator circuit further comprises a diode in parallel with the first resistor;
and the anode of the diode is connected with the second end of the first resistor, and the cathode of the diode is connected with the first end of the first resistor.
11. The driver chip of claim 8, wherein the voltage comparison sub-circuit comprises a voltage comparator, a second resistor, and a third resistor;
the first input end of the voltage comparator is connected with the output end of the integrating sub-circuit and the first end of the third resistor, the second input end of the voltage comparator is connected with the first end of the second resistor, the output end of the voltage comparator is connected with the frame frequency processing circuit, the second end of the third resistor is connected with a power supply end, and the second end of the second resistor is connected with a reference voltage end.
12. The driver chip of claim 6, wherein the transmission interface is a CPU interface, an RGB interface, or an SPI interface.
13. A display device, characterized in that the display device comprises a display panel and a driver chip according to claims 6-12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910309260.XA CN110060628A (en) | 2019-04-17 | 2019-04-17 | Display driving method and device, driving chip and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910309260.XA CN110060628A (en) | 2019-04-17 | 2019-04-17 | Display driving method and device, driving chip and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110060628A true CN110060628A (en) | 2019-07-26 |
Family
ID=67319365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910309260.XA Pending CN110060628A (en) | 2019-04-17 | 2019-04-17 | Display driving method and device, driving chip and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110060628A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112951171A (en) * | 2021-01-29 | 2021-06-11 | 昆山龙腾光电股份有限公司 | Display device and driving method |
| CN113707085A (en) * | 2021-08-03 | 2021-11-26 | 芯颖科技有限公司 | Display screen brightness compensation device and method at sub-pixel level and display screen |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101034532A (en) * | 2007-04-04 | 2007-09-12 | 友达光电股份有限公司 | Driving circuit, display device and method for adjusting the picture update rate |
| CN101197115A (en) * | 2006-12-07 | 2008-06-11 | 鸿富锦精密工业（深圳）有限公司 | Automatic brightness regulation circuit of display equipment |
| CN101561995A (en) * | 2008-04-15 | 2009-10-21 | 则武伊势电子株式会社 | Filament power supply circuit for vacuum fluorescent display tube |
| CN102103847A (en) * | 2009-12-22 | 2011-06-22 | 瑞萨电子株式会社 | Clock data recovery circuit, data transfer device for display device, and data transfer method for display device |
| US20110175878A1 (en) * | 2010-01-18 | 2011-07-21 | Chunghwa Picture Tubes, Ltd. | Driving method for display panel and display apparatus |
| CN102157133A (en) * | 2010-02-12 | 2011-08-17 | 联咏科技股份有限公司 | Backlight control device and backlight control method |
| US20130002737A1 (en) * | 2009-04-16 | 2013-01-03 | Chunghwa Picture Tubes, Ltd. | Driving circuit and gray insertion method of liquid crystal display |
| CN102945655A (en) * | 2012-11-29 | 2013-02-27 | 深圳市华星光电技术有限公司 | Light emitting diode voltage adjusting device and driving system with same |
| CN105304049A (en) * | 2015-11-19 | 2016-02-03 | 深圳市华星光电技术有限公司 | Liquid crystal display device and crosstalk defect control method of same |
| TW201616476A (en) * | 2014-10-29 | 2016-05-01 | 捷達創新股份有限公司 | Energy saving control system based on frame status and method thereof |
| CN107799053A (en) * | 2017-11-13 | 2018-03-13 | 合肥京东方光电科技有限公司 | Control method and apparatus, time schedule controller, the display device of refreshing frequency |
| CN105096882B (en) * | 2015-08-25 | 2018-04-20 | 昆山龙腾光电有限公司 | The drive system and liquid crystal display device of liquid crystal display panel |
| CN108831361A (en) * | 2018-06-25 | 2018-11-16 | 南京熊猫电子制造有限公司 | A kind of LED backlight drive circuit |
| CN109345992A (en) * | 2017-08-01 | 2019-02-15 | 富泰华工业（深圳）有限公司 | The method of adjustment of electronic device and screen refresh frequency |
-
2019
- 2019-04-17 CN CN201910309260.XA patent/CN110060628A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101197115A (en) * | 2006-12-07 | 2008-06-11 | 鸿富锦精密工业（深圳）有限公司 | Automatic brightness regulation circuit of display equipment |
| CN101034532A (en) * | 2007-04-04 | 2007-09-12 | 友达光电股份有限公司 | Driving circuit, display device and method for adjusting the picture update rate |
| CN101561995A (en) * | 2008-04-15 | 2009-10-21 | 则武伊势电子株式会社 | Filament power supply circuit for vacuum fluorescent display tube |
| US20130002737A1 (en) * | 2009-04-16 | 2013-01-03 | Chunghwa Picture Tubes, Ltd. | Driving circuit and gray insertion method of liquid crystal display |
| CN102103847A (en) * | 2009-12-22 | 2011-06-22 | 瑞萨电子株式会社 | Clock data recovery circuit, data transfer device for display device, and data transfer method for display device |
| US20110175878A1 (en) * | 2010-01-18 | 2011-07-21 | Chunghwa Picture Tubes, Ltd. | Driving method for display panel and display apparatus |
| CN102157133A (en) * | 2010-02-12 | 2011-08-17 | 联咏科技股份有限公司 | Backlight control device and backlight control method |
| CN102945655A (en) * | 2012-11-29 | 2013-02-27 | 深圳市华星光电技术有限公司 | Light emitting diode voltage adjusting device and driving system with same |
| TW201616476A (en) * | 2014-10-29 | 2016-05-01 | 捷達創新股份有限公司 | Energy saving control system based on frame status and method thereof |
| CN105096882B (en) * | 2015-08-25 | 2018-04-20 | 昆山龙腾光电有限公司 | The drive system and liquid crystal display device of liquid crystal display panel |
| CN105304049A (en) * | 2015-11-19 | 2016-02-03 | 深圳市华星光电技术有限公司 | Liquid crystal display device and crosstalk defect control method of same |
| CN109345992A (en) * | 2017-08-01 | 2019-02-15 | 富泰华工业（深圳）有限公司 | The method of adjustment of electronic device and screen refresh frequency |
| CN107799053A (en) * | 2017-11-13 | 2018-03-13 | 合肥京东方光电科技有限公司 | Control method and apparatus, time schedule controller, the display device of refreshing frequency |
| CN108831361A (en) * | 2018-06-25 | 2018-11-16 | 南京熊猫电子制造有限公司 | A kind of LED backlight drive circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112951171A (en) * | 2021-01-29 | 2021-06-11 | 昆山龙腾光电股份有限公司 | Display device and driving method |
| CN112951171B (en) * | 2021-01-29 | 2022-12-20 | 昆山龙腾光电股份有限公司 | Display device and driving method |
| CN113707085A (en) * | 2021-08-03 | 2021-11-26 | 芯颖科技有限公司 | Display screen brightness compensation device and method at sub-pixel level and display screen |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102200857B (en) | Touch signal scanning frequency determining method of touch panel | |
| CN108550350B (en) | Overcurrent protection system and overcurrent protection method of liquid crystal display panel | |
| US7952565B2 (en) | Display device and method of controlling touch detection unit | |
| KR101384283B1 (en) | Liquid crystal display and driving method thereof | |
| CN106548761B (en) | A kind of display control circuit of display panel, display control method and relevant apparatus | |
| US7015904B2 (en) | Power sequence apparatus for device driving circuit and its method | |
| WO2017004979A1 (en) | Data line drive method and unit, source driver, panel drive device and display device | |
| JP5403879B2 (en) | Liquid crystal display device and driving method thereof | |
| KR102009885B1 (en) | Display Device and Driving Method thereof | |
| KR101957489B1 (en) | Power supplying apparatus for liquid crystal display and method thereof | |
| US20080165099A1 (en) | Lcds and methods for driving same | |
| US20090201274A1 (en) | Timing Signal Generating Circuit, Electronic Apparatus, Display Apparatus, Image-Reception Apparatus, and Driving Method | |
| CN101916540B (en) | Clock pulse signal generation method | |
| JP2009229961A (en) | Liquid crystal display control device and electronic device | |
| CN108733259B (en) | Touch display device and driving method thereof | |
| CN103065599A (en) | Liquid crystal display capable of eliminating power off remained shadow | |
| KR102207220B1 (en) | Display driver, method for driving display driver and image display system | |
| CN110060628A (en) | Display driving method and device, driving chip and display device | |
| CN100419820C (en) | Display driver, electro-optical device, and control method for display driver | |
| JP2005182049A (en) | Display apparatus and method of driving the same | |
| US10446106B2 (en) | Display apparatus and method of driving the same | |
| CN110782858A (en) | Display device and power supply control method | |
| TW202129478A (en) | Driving device and operation method thereof | |
| KR101818465B1 (en) | Driving apparatus for liquid crystal display device | |
| US20090207120A1 (en) | Method for fast switching interfaces in liquid crystal display of portable electronic device |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190726 |
|
| RJ01 | Rejection of invention patent application after publication |