CN112992098A - Driving method and device, chip and electronic equipment - Google Patents

Driving method and device, chip and electronic equipment Download PDF

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Publication number
CN112992098A
CN112992098A CN202110436587.0A CN202110436587A CN112992098A CN 112992098 A CN112992098 A CN 112992098A CN 202110436587 A CN202110436587 A CN 202110436587A CN 112992098 A CN112992098 A CN 112992098A
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gray scale
display unit
mth
display data
nth
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CN202110436587.0A
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CN112992098B (en
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黄子轩
杨舜勋
苏嘉伟
简文明
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Jichuang North Zhuhai Technology Co ltd
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Jichuang North Zhuhai Technology Co ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—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
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3614—Control of polarity reversal in general
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells

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  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Optics & Photonics (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

The disclosure relates to a driving method and device, a chip and an electronic device, wherein the method comprises the following steps: determining a first gray scale corresponding to display data of an Nth display unit at the current moment and a second gray scale of display data of an Mth display unit at the adjacent previous moment; determining the polarity of the display data of the Nth display unit and the display data of the Mth display unit according to the first gray scale and the second gray scale, and determining the difference value of the first gray scale and the second gray scale; and when the polarities of the display data of the Nth display unit and the Mth display unit are the same and the difference value of the first gray scale and the second gray scale is larger than the preset difference value, controlling the data channels of the Nth display unit and the Mth display unit to share the charges. The embodiment of the disclosure can reduce the current consumption of the whole driving circuit, reduce the voltage swing of the display signal during driving, save power consumption and reduce heat energy release.

Description

Driving method and device, chip and electronic equipment
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a driving method and apparatus, a chip, and an electronic device.
Background
With the improvement of semiconductor technology, the lcd has the advantages of low power consumption, light weight, high resolution, high color saturation, and long service life, and thus is widely used in electronic products such as liquid crystal displays of computers and mobile phones and lcd tvs, which are closely related to life.
When a display panel of the liquid crystal display displays a driving signal, the power consumption is large and the heat energy is released and is large due to a working mechanism, on one hand, the polarity of the voltage applied to two ends of each pixel liquid crystal capacitor is inverted at a certain time interval, so that permanent damage caused by polarization of a liquid crystal material is avoided, and when the polarity of the voltage driving the display panel is inverted, the driving circuit consumes a large amount of current, so that the power consumption is increased; on the other hand, when the polarity is not inverted, thermal energy is also released due to a large amount of charge flow in the change of data.
Disclosure of Invention
In view of the above, the present disclosure proposes a driving method applied to a liquid crystal display panel, the method including:
determining a first gray scale corresponding to display data of an Nth display unit at the current moment and a second gray scale of display data of an Mth display unit at the adjacent previous moment, wherein N, M are unequal integers;
determining the polarity of the display data of the Nth display unit and the polarity of the display data of the Mth display unit according to the first gray scale and the second gray scale, and determining the difference value of the first gray scale and the second gray scale;
and when the polarities of the display data of the Nth display unit and the Mth display unit are the same and the difference value between the first gray scale and the second gray scale is greater than a preset difference value, controlling the data channels of the Nth display unit and the Mth display unit to share the charges.
In one possible implementation, the method further includes:
and when the polarities of the display data of the Nth display unit and the Mth display unit are opposite, controlling the data channels of the Nth display unit and the Mth display unit to share charges.
In one possible implementation manner, the determining the polarities of the display data of the nth display unit and the display data of the mth display unit according to the first gray scale and the second gray scale includes:
when the first gray scale and the second gray scale are both larger than a first gray scale threshold value or both smaller than a second gray scale threshold value, determining that the polarities of the display data of the Nth display unit and the display data of the Mth display unit are the same,
wherein the first grayscale threshold is greater than the second grayscale threshold.
In one possible implementation manner, the determining the polarities of the display data of the nth display unit and the display data of the mth display unit according to the first gray scale and the second gray scale includes:
determining that the polarity of the display data of the Nth display unit is opposite to that of the display data of the Mth display unit when one of the first gray scale and the second gray scale is greater than or equal to the first gray scale threshold and the other of the first gray scale and the second gray scale is less than or equal to the second gray scale threshold,
wherein the first grayscale threshold is greater than the second grayscale threshold.
In one possible implementation, the method further includes:
and caching the relation between the first gray scale and the second gray scale at each moment and the threshold value of the first gray scale and the threshold value of the second gray scale and the difference value between the first gray scale and the second gray scale at each moment.
In one possible implementation manner, the mth display unit and the nth display unit are located in the same display row of an adjacent display column.
According to an aspect of the present disclosure, there is provided a driving apparatus applied to a liquid crystal display panel, the apparatus including:
a first determining module, configured to determine a first gray scale corresponding to display data of an nth display unit at a current time and a second gray scale corresponding to display data of an mth display unit at an adjacent previous time, where N, M are unequal integers;
the second determining module is connected to the first determining module and used for determining the polarity of the display data of the Nth display unit and the polarity of the display data of the Mth display unit according to the first gray scale and the second gray scale and determining the difference value of the first gray scale and the second gray scale;
and the charge sharing module is connected to the second determining module and used for controlling the data channel of the Nth display unit and the data channel of the Mth display unit to share charges when the polarities of the display data of the Nth display unit and the Mth display unit are the same and the difference value between the first gray scale and the second gray scale is greater than a preset difference value.
In one possible implementation, the charge sharing module is further configured to:
and when the polarities of the display data of the Nth display unit and the Mth display unit are opposite, controlling the data channels of the Nth display unit and the Mth display unit to share charges.
In one possible implementation manner, the second determining module includes:
a first determining unit, configured to determine that the polarities of the display data of the nth display unit and the display data of the mth display unit are the same when the first gray scale and the second gray scale are both greater than a first gray scale threshold or both less than a second gray scale threshold,
wherein the first grayscale threshold is greater than the second grayscale threshold.
In one possible implementation manner, the second determining module includes:
a second determination unit configured to determine that the display data of the Nth display unit and the display data of the Mth display unit are opposite in polarity when one of the first gray scale and the second gray scale is greater than or equal to the first gray scale threshold and the other of the first gray scale and the second gray scale is less than or equal to the second gray scale threshold,
wherein the first grayscale threshold is greater than the second grayscale threshold.
In one possible implementation, the apparatus further includes:
and the cache module is used for caching the relationship between the first gray scale and the second gray scale at each moment and the threshold value of the first gray scale and the threshold value of the second gray scale and the difference value between the first gray scale and the second gray scale at each moment.
In one possible implementation manner, the second determining module includes:
the first comparison circuit is used for comparing the first gray scale with the first gray scale threshold value to obtain a first comparison result;
the second comparison circuit is used for comparing the second gray scale with the second gray scale threshold value to obtain a second comparison result;
a signal generating unit connected to the first comparing circuit and the second comparing circuit, for:
when the first gray scale and the second gray scale are both larger than a first gray scale threshold value or both smaller than a second gray scale threshold value, outputting a signal with the same polarity to determine that the polarities of the display data of the Nth display unit and the Mth display unit are the same, or
When one of the first gray scale and the second gray scale is larger than or equal to the first gray scale threshold value and the other one of the first gray scale and the second gray scale is smaller than or equal to the second gray scale threshold value, outputting a polarity-opposite signal to determine that the polarities of the display data of the Nth display unit and the Mth display unit are opposite.
According to an aspect of the present disclosure, there is provided a chip including the display driving apparatus.
According to an aspect of the present disclosure, there is provided an electronic device including the chip.
In one possible implementation, the electronic device includes a display, a smartphone, or a portable device.
The embodiment of the disclosure determines a first gray scale corresponding to display data of an nth display unit at a current moment and a second gray scale of display data of an mth display unit at an adjacent previous moment, determines polarities of the display data of the nth display unit and the display data of the mth display unit according to the first gray scale and the second gray scale, and determines a difference value between the first gray scale and the second gray scale, and controls a data channel of the nth display unit and a data channel of the mth display unit to share charges when the polarities of the display data of the nth display unit and the display data of the mth display unit are the same and the difference value between the first gray scale and the second gray scale is greater than a preset difference value, so that the charges of the data channels can be evenly distributed when the polarities of the nth display unit and the display unit are the same, the initial potential of each channel is reduced or increased to be close to the common voltage, and when the driving is carried out, the driving can be carried out by using smaller current so as to reduce the current consumption of the whole driving circuit, and the voltage swing of a display signal during the driving can be reduced, so that the power consumption is saved, the heat energy release is reduced, the temperature of a driving device is reduced, and the performance is improved.
Other features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the disclosure and, together with the description, serve to explain the principles of the disclosure.
Fig. 1 shows a flow chart of a driving method according to an embodiment of the present disclosure.
Fig. 2 shows a flow chart of a driving method according to an embodiment of the present disclosure.
Fig. 3 shows a block diagram of a driving apparatus according to an embodiment of the present disclosure.
Fig. 4 illustrates a block diagram of a drive device in accordance with an implementation of the present disclosure.
Fig. 5 shows a schematic diagram of driving timing according to an embodiment employing the present disclosure.
Detailed Description
Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
In the description of the present disclosure, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is solely for the purpose of facilitating the description and simplifying the description, and does not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and, therefore, should not be taken as limiting the present disclosure.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present disclosure, "a plurality" means two or more unless specifically limited otherwise.
In the present disclosure, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present disclosure. It will be understood by those skilled in the art that the present disclosure may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present disclosure.
Referring to fig. 1, fig. 1 shows a flowchart of a driving method according to an embodiment of the disclosure.
The method is applied to a liquid crystal display panel, and as shown in FIG. 1, the method comprises the following steps:
step S11, determining a first gray scale corresponding to the display data of the Nth display unit at the current moment and a second gray scale corresponding to the display data of the Mth display unit at the adjacent previous moment, wherein N, M is an unequal integer;
step S12, determining polarities of display data of the nth display unit and display data of the mth display unit according to the first gray scale and the second gray scale, and determining a difference value between the first gray scale and the second gray scale;
step S13, when the polarities of the display data of the nth display unit and the mth display unit are the same and the difference value between the first gray scale and the second gray scale is greater than a preset difference value, controlling the data channels of the nth display unit and the mth display unit to perform charge sharing.
The embodiment of the disclosure determines a first gray scale corresponding to display data of an nth display unit at a current moment and a second gray scale of display data of an mth display unit at an adjacent previous moment, determines polarities of the display data of the nth display unit and the display data of the mth display unit according to the first gray scale and the second gray scale, and determines a difference value between the first gray scale and the second gray scale, and controls a data channel of the nth display unit and a data channel of the mth display unit to share charges when the polarities of the display data of the nth display unit and the display data of the mth display unit are the same and the difference value between the first gray scale and the second gray scale is greater than a preset difference value, so that the charges of the data channels can be evenly distributed when the polarities of the nth display unit and the display unit are the same, the initial potential of each channel is reduced or increased to be close to the common voltage, and when the driving is carried out, the driving can be carried out by using smaller current so as to reduce the current consumption of the whole driving circuit, and the voltage swing of a display signal during the driving can be reduced, so that the power consumption is saved, the heat energy release is reduced, the temperature of a driving device is reduced, and the performance is improved.
In the related art, the configuration information of each frame of data or the polarity control signal sent by the timing controller is usually utilized to control the liquid crystal display panel to share charges, and for the two data channels, for the liquid crystal display panel without configuration information or the polarity control signal sent by the timing controller, the liquid crystal display panel does not have an active charge sharing function.
In one example, the driving method can be applied to an electronic device with a liquid crystal display, which may also be referred to as a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), or the like, and is a device that provides voice and/or data connectivity to a user, for example, a handheld device with a wireless connection function, a vehicle-mounted device, or the like. Currently, some examples of terminals are: mobile phone (mobile phone), tablet computer, notebook computer, palmtop computer, Mobile Internet Device (MID), wearable device, Virtual Reality (VR) device, Augmented Reality (AR) device, wireless terminal in industrial control (industrial control), wireless terminal in unmanned driving (self), wireless terminal in remote surgery (remote medical supply), wireless terminal in smart grid (smart grid), wireless terminal in transportation safety, wireless terminal in city (smart city), wireless terminal in smart home (smart home), wireless terminal in car networking, sound box, smart wearable device, digital camera, mp3, mp4, broadband router, electronic book, switch, cat, ndp, PS, xs, PS, x 3, digital satellite disk receiver, and the like.
The driving method of the embodiments of the present disclosure may be performed by a processing component, which includes but is not limited to a single chip, or a discrete component, or a combination of a chip and a discrete component. The processor may be implemented in any suitable manner, for example, by using a microprocessor, a Central Processing Unit (CPU), a control logic portion in a memory controller, or the like, or by using a dedicated hardware circuit or a digital circuit, which is not limited herein.
In a possible implementation manner, the display unit may include a display row, a display column, a pixel unit, or a pixel array composed of a plurality of pixel units, and for a specific type of the display unit, the embodiment of the present disclosure is not limited, and a person skilled in the art may determine the type as needed.
In one example, the mth display unit and the nth display unit are located in a same display row of an adjacent display column. Of course, the specific values of M and N are not limited in the embodiments of the present disclosure.
In one example, if the display cells are display lines, the mth line of display data (corresponding to the mth display cell) may be any other line or lines of display data different from the nth line of display data (corresponding to the nth display cell).
In one example, the embodiment of the present disclosure may set the mth display unit to be an adjacent next display line of the nth display unit.
The specific implementation manner of determining the first gray scale corresponding to the display data of the nth display unit at the current time and the second gray scale of the display data of the mth display unit at the adjacent previous time in step S11 is not limited in the embodiment of the present disclosure, and the gray scales may be 256 gray scales or other gray scales, and thus, the embodiment of the present disclosure is not limited.
It should be understood that, although the embodiments of the present disclosure use the gray scale of the display data to determine whether to perform charge sharing, the embodiments of the present disclosure are not limited thereto, and other embodiments of the present disclosure may determine the driving voltage according to the display data or the gray scale, and use the driving voltage to determine whether to perform charge sharing.
Referring to fig. 2, fig. 2 is a flowchart illustrating a driving method according to an embodiment of the disclosure.
In one possible implementation, as shown in fig. 2, the method further includes:
step S14, when the polarities of the display data of the nth display unit and the mth display unit are opposite, controlling the data channels of the nth display unit and the mth display unit to perform charge sharing.
The embodiment of the disclosure determines a first gray scale corresponding to display data of an nth display unit at a current moment and a second gray scale of display data of an mth display unit at an adjacent previous moment, determines polarities of the display data of the nth display unit and the display data of the mth display unit according to the first gray scale and the second gray scale, and controls a data channel of the nth display unit and a data channel of the mth display unit to share charges when polarities of the display data of the nth display unit and the display data of the mth display unit are opposite, so that charges of the data channels can be equally distributed when the polarities of the nth display unit and the display data of the mth display unit are opposite, initial potentials of the respective channels are reduced or increased to be close to a common voltage, and the display can be driven by a small current when the display units are driven, the current consumption of the whole driving circuit is reduced, the voltage swing of the display signal during driving can be reduced, the power consumption is saved, the heat energy release is reduced, the temperature of the driving device is reduced, and the performance is improved.
In the embodiment of the present disclosure, when the polarities of the display data of the nth display unit and the display data of the mth display unit are opposite, or when the polarities of the display data of the nth display unit and the display data of the mth display unit are the same, and the difference value between the first gray scale and the second gray scale is greater than the preset difference value, charge sharing may be performed, so as to save power consumption and reduce heat energy release.
In one possible implementation manner, the step S12 determining the polarities of the display data of the nth display unit and the display data of the mth display unit according to the first gray scale and the second gray scale may include:
when the first gray scale and the second gray scale are both larger than a first gray scale threshold value or both smaller than a second gray scale threshold value, determining that the polarities of the display data of the Nth display unit and the display data of the Mth display unit are the same,
wherein the first grayscale threshold is greater than the second grayscale threshold.
In one example, the first gray level threshold may be set to a high gray level value, when the gray level is higher than the first gray level threshold, the corresponding display data has higher brightness, that is, a higher voltage is required for driving, and the first gray level threshold may also be converted into a high voltage threshold, and in other ways, the voltage threshold is used as a reference to determine whether the display data needs a higher voltage for driving.
In one example, the second gray level threshold may be set to a low gray level value, when the gray level is lower than the second gray level threshold, the corresponding display data has a lower brightness, that is, a lower voltage is required for driving, and the second gray level threshold may also be converted into a low voltage threshold, and in other ways, the voltage threshold is used as a reference to determine whether the display data needs a lower voltage for driving.
The specific sizes of the first gray level threshold and the second gray level threshold are not limited in the embodiments of the present disclosure, and those skilled in the art can set the first gray level threshold and the second gray level threshold according to actual situations.
For example, the display data is 8 bits, the first gray level threshold can be determined according to the most significant bit and the second most significant bit being 1 (e.g. 11 xxxxxx); the second gray level threshold may be determined based on the most significant bit and the second most significant bit being 0 (e.g., 00 xxxxxx).
In the driving method of the embodiment of the disclosure, when both the first gray scale and the second gray scale are greater than or equal to the first gray scale threshold value, or both are less than or equal to the second gray scale threshold value, it may be determined that the display data of the mth display unit and the display data of the nth display unit have the same polarity, and under such a condition, it may be further determined whether a difference value between the first gray scale and the second gray scale is greater than a preset difference value, so as to perform charge sharing when the data voltage of the display data at adjacent times is greatly changed (the value is changed from large to small or from small to large), so as to reduce power consumption and release heat energy.
In one possible implementation manner, the step S12 determining the polarities of the display data of the nth display unit and the display data of the mth display unit according to the first gray scale and the second gray scale may further include:
determining that the polarity of the display data of the Nth display unit is opposite to that of the display data of the Mth display unit when one of the first gray scale and the second gray scale is greater than or equal to the first gray scale threshold and the other of the first gray scale and the second gray scale is less than or equal to the second gray scale threshold,
wherein the first grayscale threshold is greater than the second grayscale threshold.
In the driving method according to the embodiment of the disclosure, when one of the first gray scale and the second gray scale is greater than or equal to the first gray scale threshold and the other of the first gray scale and the second gray scale is less than or equal to the second gray scale threshold, it may be determined that the display data of the mth display unit and the display data of the nth display unit have different polarities.
In one example, in the process of controlling the liquid crystal panel, the output display data may be converted from a low gray scale to a high gray scale or from a high gray scale to a low gray scale, and therefore, when determining whether to perform charge sharing, the embodiment of the present disclosure may determine that a first gray scale (high gray scale) is greater than or equal to the first gray scale threshold, and a second gray scale (low gray scale) is less than or equal to the second gray scale threshold; or the second gray scale (high gray scale) is greater than or equal to the first gray scale threshold, and the first gray scale (low gray scale) is less than or equal to the second gray scale threshold, in both cases, the embodiment of the present disclosure determines that charge sharing is required.
In one possible implementation, as shown in fig. 2, the method may further include:
step S15, the relationship between the first gray scale and the second gray scale at each time and the threshold of the first gray scale and the threshold of the second gray scale respectively, and the difference between the first gray scale and the second gray scale at each time are cached.
According to the embodiment of the disclosure, the relationship between the first gray scale and the second gray scale at each moment and the threshold of the first gray scale and the threshold of the second gray scale and the difference value between the first gray scale and the second gray scale at each moment are cached, so that the relationship between the first gray scale and the threshold of the second gray scale at the previous moment and the threshold of the first gray scale and the relationship between the second gray scale and the difference value between the first gray scale and the second gray scale at each moment are output when needed, the processing progress can be accelerated, and the processing efficiency is improved.
In a possible implementation manner, the embodiment of the disclosure may set a switch in each data channel of the display panel, and turn on the switches between the data channels when it is determined that charge sharing is required, so as to implement charge sharing.
For a specific implementation manner of controlling the nth display unit and the mth display unit to perform charge sharing in step S13, embodiments of the present disclosure are not limited, and those skilled in the art may implement the charge sharing according to the related art.
Referring to fig. 3, fig. 3 is a block diagram of a driving apparatus according to an embodiment of the disclosure.
The device is applied to a liquid crystal display panel, and as shown in fig. 3, the device includes:
a first determining module 10, configured to determine a first gray scale corresponding to display data of an nth display unit at a current time and a second gray scale corresponding to display data of an mth display unit at an adjacent previous time, where N, M are unequal integers;
a second determining module 20, connected to the first determining module 10, for determining the polarity of the display data of the nth display unit and the display data of the mth display unit according to the first gray scale and the second gray scale, and determining the difference value between the first gray scale and the second gray scale;
and a charge sharing module 30, connected to the second determining module 20, for controlling the data channels of the nth and mth display units to share charges when the polarities of the display data of the nth and mth display units are the same and the difference value between the first gray scale and the second gray scale is greater than a preset difference value.
The embodiment of the disclosure determines a first gray scale corresponding to display data of an nth display unit at a current moment and a second gray scale of display data of an mth display unit at an adjacent previous moment, determines polarities of the display data of the nth display unit and the display data of the mth display unit according to the first gray scale and the second gray scale, and determines a difference value between the first gray scale and the second gray scale, and controls a data channel of the nth display unit and a data channel of the mth display unit to share charges when the polarities of the display data of the nth display unit and the display data of the mth display unit are the same and the difference value between the first gray scale and the second gray scale is greater than a preset difference value, so that the charges of the data channels can be evenly distributed when the polarities of the nth display unit and the display unit are the same, the initial potential of each channel is reduced or increased to be close to the common voltage, and when the driving is carried out, the driving can be carried out by using smaller current so as to reduce the current consumption of the whole driving circuit, and the voltage swing of a display signal during the driving can be reduced, so that the power consumption is saved, the heat energy release is reduced, the temperature of a driving device is reduced, and the performance is improved.
In the following, possible implementations of the drive device are exemplarily described.
In a possible implementation manner, the embodiment of the present disclosure may determine the gray scale corresponding to the display data through the first determining module 10, and a person skilled in the art may use a general-purpose hardware circuit (e.g., a central processing unit, a microprocessor, etc.) to implement the embodiment of the present disclosure without limitation to a specific implementation manner of the first determining module 10.
In one possible implementation manner, the charge sharing module may be further configured to:
and when the polarities of the display data of the Nth display unit and the Mth display unit are opposite, controlling the data channels of the Nth display unit and the Mth display unit to share charges.
Referring to fig. 4, fig. 4 shows a block diagram of a driving apparatus according to an embodiment of the disclosure.
In a possible implementation manner, as shown in fig. 4, the second determining module may include:
a first determining unit 210, configured to determine that the polarities of the display data of the nth display unit and the display data of the mth display unit are the same when the first gray scale and the second gray scale are both greater than a first gray scale threshold or both less than a second gray scale threshold,
wherein the first grayscale threshold is greater than the second grayscale threshold.
In one possible implementation, as shown in fig. 4, the second determining module 20 includes:
a second determining unit 220, configured to determine that the display data of the nth display unit and the display data of the mth display unit have opposite polarities when one of the first gray scale and the second gray scale is greater than or equal to the first gray scale threshold and the other of the first gray scale and the second gray scale is less than or equal to the second gray scale threshold,
wherein the first grayscale threshold is greater than the second grayscale threshold.
In one possible implementation, as shown in fig. 4, the apparatus may further include:
and the cache module is used for caching the relationship between the first gray scale and the second gray scale at each moment and the threshold value of the first gray scale and the threshold value of the second gray scale and the difference value between the first gray scale and the second gray scale at each moment.
In a possible implementation manner, as shown in fig. 4, the second determining module may include:
a first comparing circuit 2101 configured to compare the first gray scale with the first gray scale threshold to obtain a first comparison result;
a second comparing circuit 2102, configured to compare the second gray scale with the second gray scale threshold to obtain a second comparison result;
a signal generating unit 2103 connected to the first comparing circuit and the second comparing circuit, for:
when the first gray scale and the second gray scale are both larger than a first gray scale threshold value or both smaller than a second gray scale threshold value, outputting a signal with the same polarity to determine that the polarities of the display data of the Nth display unit and the Mth display unit are the same, or
When one of the first gray scale and the second gray scale is larger than or equal to the first gray scale threshold value and the other one of the first gray scale and the second gray scale is smaller than or equal to the second gray scale threshold value, outputting a polarity-opposite signal to determine that the polarities of the display data of the Nth display unit and the Mth display unit are opposite.
It should be noted that the first comparing circuit 2101, the second comparing circuit 2102 and the signal generating unit 2103 may be disposed in the first determining unit 210 and the second determining unit 220, and in an example, more comparing circuits may be disposed in the embodiment of the present disclosure, for example, the third comparing circuit may compare the first gray scale with the second gray scale threshold, and the fourth comparing circuit may compare the second gray scale with the first gray scale threshold, of course, the first comparing circuit may also compare the first gray scale with the second gray scale threshold, and the second comparing circuit may also compare the second gray scale with the first gray scale threshold to obtain respective comparison results, which is not limited in the embodiment of the present disclosure.
In one example, the first and second comparison circuits 2101, 2102 may each include a comparator.
In one example, the signal generation unit 2103 may include and logic circuits, or one of logic circuits, non-logic circuits, or a combination thereof.
In one example, each of the first and second determining units 210 and 220 may include a plurality of comparing circuits and signal generating units to generate control signals according to the first and second gray scales.
In one possible embodiment, the buffer module 40 may include a plurality of temporary registers 410, which may be disposed at the output of the comparison circuit to temporarily store the comparison result, as described in the following.
In a possible implementation manner, the buffer module 40 may be further configured to buffer the display data, so that the first determining module 10 calls to determine a first gray scale corresponding to the display data of the nth display unit at the current time and a second gray scale corresponding to the display data of the mth display unit at an adjacent previous time, or may be configured to store gray scales corresponding to the display data of the display units at various times, and the first determining module 10 may directly obtain the first gray scale corresponding to the display data of the nth display unit at the current time and the second gray scale corresponding to the display data of the mth display unit at the adjacent previous time from the buffer module 40, which is not limited in the embodiment of the present disclosure with respect to a specific implementation manner.
In a possible embodiment, a register 410 may be disposed between the first comparing circuit 2101 and the signal generating unit 2103, or between the second comparing circuit 2102 and the signal generating unit 2103, to temporarily store the comparison result obtained by the current comparing circuit, and of course, in some cases, the number of registers may be reduced, for example, only the gray scales of the display data at the current time and the previous time of the display data of the adjacent data channels are compared to determine whether to perform charge sharing, for example, the register between the second comparing circuit 2102 and the signal generating unit 2103 may be omitted, so that the second comparing circuit 2102 directly outputs the comparison result of the data unit at the current time to the signal generating unit 2103.
Of course, the above description of the buffer module 40 is exemplary, and the buffer module may further include, for example, a multiplexer MUX or other type of pass device to send the comparison result to the register or directly to the signal generating unit 2103 as required. Furthermore, the cache module may also include other types of memories, and is not limited to a temporary memory, for example, the cache module may be implemented by any type of volatile or nonvolatile memory device or combination thereof, such as a Static Random Access Memory (SRAM), an Electrically Erasable Programmable Read Only Memory (EEPROM), an Erasable Programmable Read Only Memory (EPROM), a Programmable Read Only Memory (PROM), a Read Only Memory (ROM), a magnetic memory, a flash memory, a magnetic disk or an optical disk, and the embodiments of the disclosure are not limited thereto.
In one possible embodiment, as shown in fig. 4, the charge sharing module 30 may include a switch unit 310, the switch unit 310 may include, for example, a plurality of controllable switches, which may include, for example, Metal-Oxide-Semiconductor Field-Effect transistors (MOSFETs), Insulated Gate Bipolar Transistors (IGBTs), and the like, and the switch unit 310 may receive the control signal output by the signal generating unit 2103 and short-circuit and conduct the data channel corresponding to the corresponding display unit to implement the charge sharing operation.
In an example, the second determining module 20 may further include an absolute value operating circuit and a difference calculating circuit, where the absolute value operating circuit is configured to implement an absolute value operation on the first gray scale and the second gray scale, or implement an absolute value operation on display data of the nth display unit and display data of the mth display unit, and the difference calculating circuit is configured to determine a difference value between the first gray scale and the second gray scale.
Referring to fig. 5, fig. 5 is a schematic diagram illustrating a driving timing sequence according to an embodiment of the disclosure.
In one example, as shown in fig. 5, an embodiment of the present disclosure is shown as Y2n-1Display unit and Y2nThe display data of the display unit have opposite polarities (T1 stage, T2 stage Y)2n-1The polarities of the display units are respectively negative (-), positive (+), and Y2nThe display data of the display unit has the same polarity (T3 stage, T4 stage Y)2n-1The polarity of the display unit is positive (+), and Y2nThe polarities of the display data of the display unit are-, -) respectively, charge sharing can be performed, so that the voltages of the data channels after charge sharing are the voltages V1 and V2 respectively, wherein n is an integer.
The second determining module 20 may determine polarities of the display data of the nth display unit and the display data of the mth display unit, and may output an effective first switching signal when the polarities of the display data of the nth display unit and the display data of the mth display unit are opposite; or when the display data of the nth display unit and the display data of the mth display unit have the same polarity and the difference value between the first gray scale and the second gray scale is greater than the preset difference value, outputting an effective second switching signal, where the first switching signal or the second switching signal may be used to control the switching unit 310 to be turned on to connect and turn on the data channels of the nth display unit and the mth display unit, so as to perform charge distribution, so that charges in the data channels of the nth display unit and the mth display unit may be evenly distributed, and the initial potentials of the respective channels may be decreased or increased to be close to a common voltage, and when driving, the driving may be performed with a smaller current to reduce the current consumption of the entire driving circuit, and may reduce the voltage swing of the display signals during driving, save power consumption, and reduce heat energy release, the temperature of the driving device is reduced, and the performance is improved.
It should be noted that the above driving apparatus is an apparatus item corresponding to the driving method, and for specific introduction, reference is made to the description of the method, which is not repeated herein.
According to the driving method, whether charge sharing is carried out can be judged according to the gray scales of the display units at the adjacent moments, charge sharing does not need to be carried out depending on a polarity control signal sent by the time schedule controller or external configuration information, self-adaptive capacity is improved, and power consumption is reduced.
Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (15)

1. A driving method is applied to a liquid crystal display panel, and comprises the following steps:
determining a first gray scale corresponding to display data of an Nth display unit at the current moment and a second gray scale of display data of an Mth display unit at the adjacent previous moment, wherein N, M are unequal integers;
determining the polarity of the display data of the Nth display unit and the polarity of the display data of the Mth display unit according to the first gray scale and the second gray scale, and determining the difference value of the first gray scale and the second gray scale;
and when the polarities of the display data of the Nth display unit and the Mth display unit are the same and the difference value between the first gray scale and the second gray scale is greater than a preset difference value, controlling the data channels of the Nth display unit and the Mth display unit to share the charges.
2. The method of claim 1, further comprising:
and when the polarities of the display data of the Nth display unit and the Mth display unit are opposite, controlling the data channels of the Nth display unit and the Mth display unit to share charges.
3. The method of claim 1, wherein determining the polarity of the display data of the Nth display unit and the display data of the Mth display unit according to the first gray scale and the second gray scale comprises:
when the first gray scale and the second gray scale are both larger than a first gray scale threshold value or both smaller than a second gray scale threshold value, determining that the polarities of the display data of the Nth display unit and the display data of the Mth display unit are the same,
wherein the first grayscale threshold is greater than the second grayscale threshold.
4. The method of claim 1, wherein determining the polarity of the display data of the Nth display unit and the display data of the Mth display unit according to the first gray scale and the second gray scale comprises:
determining that the polarity of the display data of the Nth display unit is opposite to that of the display data of the Mth display unit when one of the first gray scale and the second gray scale is greater than or equal to the first gray scale threshold and the other of the first gray scale and the second gray scale is less than or equal to the second gray scale threshold,
wherein the first grayscale threshold is greater than the second grayscale threshold.
5. The method of claim 1, further comprising:
and caching the relation between the first gray scale and the second gray scale at each moment and the threshold value of the first gray scale and the threshold value of the second gray scale and the difference value between the first gray scale and the second gray scale at each moment.
6. The method of claim 1, wherein the Mth display cell and the Nth display cell are located in a same display row of an adjacent display column.
7. A driving apparatus, applied to a liquid crystal display panel, comprising:
a first determining module, configured to determine a first gray scale corresponding to display data of an nth display unit at a current time and a second gray scale corresponding to display data of an mth display unit at an adjacent previous time, where N, M are unequal integers;
the second determining module is connected to the first determining module and used for determining the polarity of the display data of the Nth display unit and the polarity of the display data of the Mth display unit according to the first gray scale and the second gray scale and determining the difference value of the first gray scale and the second gray scale;
and the charge sharing module is connected to the second determining module and used for controlling the data channel of the Nth display unit and the data channel of the Mth display unit to share charges when the polarities of the display data of the Nth display unit and the Mth display unit are the same and the difference value between the first gray scale and the second gray scale is greater than a preset difference value.
8. The apparatus of claim 7, wherein the charge sharing module is further configured to:
and when the polarities of the display data of the Nth display unit and the Mth display unit are opposite, controlling the data channels of the Nth display unit and the Mth display unit to share charges.
9. The apparatus of claim 7, wherein the second determining module comprises:
a first determining unit, configured to determine that the polarities of the display data of the nth display unit and the display data of the mth display unit are the same when the first gray scale and the second gray scale are both greater than a first gray scale threshold or both less than a second gray scale threshold,
wherein the first grayscale threshold is greater than the second grayscale threshold.
10. The apparatus of claim 7, wherein the second determining module comprises:
a second determination unit configured to determine that the display data of the Nth display unit and the display data of the Mth display unit are opposite in polarity when one of the first gray scale and the second gray scale is greater than or equal to the first gray scale threshold and the other of the first gray scale and the second gray scale is less than or equal to the second gray scale threshold,
wherein the first grayscale threshold is greater than the second grayscale threshold.
11. The apparatus of claim 7, further comprising:
and the cache module is used for caching the relationship between the first gray scale and the second gray scale at each moment and the threshold value of the first gray scale and the threshold value of the second gray scale and the difference value between the first gray scale and the second gray scale at each moment.
12. The apparatus of claim 7, wherein the second determining module comprises:
the first comparison circuit is used for comparing the first gray scale with the first gray scale threshold value to obtain a first comparison result;
the second comparison circuit is used for comparing the second gray scale with the second gray scale threshold value to obtain a second comparison result;
a signal generating unit connected to the first comparing circuit and the second comparing circuit, for:
when the first gray scale and the second gray scale are both larger than a first gray scale threshold value or both smaller than a second gray scale threshold value, outputting a signal with the same polarity to determine that the polarities of the display data of the Nth display unit and the Mth display unit are the same, or
When one of the first gray scale and the second gray scale is larger than or equal to the first gray scale threshold value and the other one of the first gray scale and the second gray scale is smaller than or equal to the second gray scale threshold value, outputting a polarity-opposite signal to determine that the polarities of the display data of the Nth display unit and the Mth display unit are opposite.
13. A chip comprising a display driver device according to any one of claims 7 to 12.
14. An electronic device, characterized in that the electronic device comprises a chip according to claim 13.
15. The electronic device of claim 14, wherein the electronic device comprises a display, a smartphone, or a portable device.
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