CN114023283B - Display driving module, display device and display driving method - Google Patents
Display driving module, display device and display driving method Download PDFInfo
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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
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
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Abstract
A display driving module, a display device and a display driving method, wherein the display driving module is configured to drive a display panel, and includes: a timing controller configured to generate a control signal; a gamma circuit electrically connected to the timing controller and configured to output a first gamma reference voltage signal or a second gamma reference voltage signal at each display frame of the display panel according to the control signal, so that the display panel displays an image according to different gamma reference voltage signals at adjacent display frames; wherein the voltage values of the first gamma reference voltage signal and the second gamma reference voltage signal are different.
Description
Technical Field
The disclosure relates to the field of display technologies, but not limited to, and in particular, to a display driving module, a display device and a display driving method.
Background
As a flat panel display device, a thin film transistor-liquid crystal display (TFT-LCD) is increasingly used in the field of high performance display due to its small size, low power consumption, no radiation, and relatively low manufacturing cost. The liquid crystal display panel, the backlight module and the display driving chip are important components, wherein the display driving chip can drive liquid crystal molecules in the liquid crystal display panel to deflect.
Disclosure of Invention
The following is a summary of the subject matter of the detailed description of the present disclosure. This summary is not intended to limit the scope of the claims.
In a first aspect, the present disclosure provides a display driving module configured to drive a display panel, comprising:
a timing controller configured to generate a control signal;
a gamma circuit electrically connected to the timing controller and configured to output a first gamma reference voltage signal or a second gamma reference voltage signal at each display frame of the display panel according to the control signal, so that the display panel displays an image according to different gamma reference voltage signals at adjacent display frames;
wherein the voltage values of the first gamma reference voltage signal and the second gamma reference voltage signal are different.
In some possible implementations, the gamma circuit includes:
a memory configured to store the first gamma reference voltage signal and the second gamma reference voltage signal;
a signal selector electrically connected to the memory and configured to acquire the first gamma reference voltage signal or the second gamma reference voltage signal from the memory according to the control signal;
the first digital-to-analog converter is electrically connected with the signal selector and is used for performing digital-to-analog conversion on the signals acquired by the signal selector.
In some possible implementations, the first gamma reference voltage signal and the second gamma reference voltage signal are digital signals.
In some possible implementations, the first gamma reference voltage signal includes: a plurality of first reference voltage signals, the second gamma reference voltage signals comprising: a plurality of second reference voltage signals; the first reference voltage signals and the second reference voltage signals correspond to gray scales respectively;
for each gray level, the voltage value of the corresponding first reference voltage signal is greater than or equal to the voltage value of the corresponding second binding voltage signal.
In some possible implementations, the control signal is a square wave signal.
In some possible implementations, the square wave signal is a first level signal in an odd display frame of the display panel, and is a second level signal in an even frame of the display panel;
the logic level of the first level signal is different from the logic level of the second level signal.
In some possible implementations, the logic level of the first level signal is 1 and the logic level of the second level signal is 0;
alternatively, the logic level of the first level signal is 0, and the logic level of the second level signal is 1.
In some possible implementations, the signal selector is configured to receive the square wave signal, retrieve the first gamma reference voltage signal from the memory in a state where the square wave signal is the first level signal, and retrieve the second gamma reference voltage signal from the memory in a state where the square wave signal is the second level signal.
In some possible implementations, the timing controller is further configured to obtain a first color data signal, and obtain a second color data signal according to the first color data signal.
In some possible implementations, the first color data signal and the second color data signal are digital signals.
In some possible implementations, the method further includes: a source driver;
the source driver is electrically connected with the gamma circuit, the time schedule controller and the display panel respectively, and is configured to generate an analog data signal according to the signal output by the gamma circuit and the second color data signal and output the analog data signal to the display panel.
In some possible implementations, the source driver includes:
a serial-to-parallel converter connected to the timing controller and configured to serial-to-parallel convert the second color data signal;
the second digital-to-analog converter is respectively connected with the serial-to-parallel converter and the first digital-to-analog converter and is used for performing digital-to-analog conversion on the signal output by the serial-to-parallel converter according to the signal output by the first digital-to-analog converter and the second color data signal;
the buffer is electrically connected with the second digital-to-analog converter and is used for storing digital signals after the second digital-to-analog converter performs digital-to-analog conversion.
In some possible implementations, the display panel includes: a plurality of data lines, the source driver further comprising:
the multiplexing output circuit is respectively connected with the buffer and the display panel and is used for outputting the digital signals stored in the buffer to the data lines of the display panel.
In a second aspect, the present disclosure also provides a display apparatus including: a display panel and the display driving module;
the display driving module is electrically connected with the display panel.
In some possible implementations, the display panel is a liquid crystal display panel, the liquid crystal display panel including: a plurality of pixels;
at least one pixel includes at least one liquid crystal orientation therein.
In a third aspect, the present disclosure further provides a display driving method, which is applied to the display driving module, where the method includes:
generating a control signal;
and outputting a first gamma reference voltage signal or a second gamma reference voltage signal at each display frame of the display panel according to the control signal, so that the display panel displays images according to different gamma reference voltage signals at adjacent display frames.
In some possible implementations, the outputting the first gamma reference voltage signal or the second gamma reference voltage signal at each display frame of the display panel according to the control signal includes:
storing the first gamma reference voltage signal and the second gamma reference voltage signal;
acquiring the first gamma reference voltage signal or the second gamma reference voltage signal according to the control signal;
and D, performing digital-to-analog conversion on the acquired signals.
In some possible implementations, the control signal is a square wave signal, the square wave signal is a first level signal in an odd display frame of the display panel, and the square wave signal is a second level signal in an even frame of the display panel;
the obtaining the first gamma reference voltage signal or the second gamma reference voltage signal according to the control signal includes:
and receiving the square wave signal, acquiring the first gamma reference voltage signal from the memory in the state that the square wave signal is the first level signal, and acquiring the second gamma reference voltage signal from the memory in the state that the square wave signal is the second level signal.
Other aspects will become apparent upon reading and understanding the accompanying drawings and detailed description.
Drawings
The accompanying drawings are included to provide an understanding of the technical aspects of the present disclosure, and are incorporated in and constitute a part of this specification, illustrate the technical aspects of the present disclosure and together with the embodiments of the disclosure, not to limit the technical aspects of the present disclosure.
Fig. 1 is a schematic structural diagram of a display driving module according to an embodiment of the disclosure;
FIG. 2 is a schematic diagram of a gamma curve corresponding to two gamma reference voltage signals;
fig. 3 is a schematic structural diagram of a display driving module according to an exemplary embodiment;
fig. 4 is a schematic structural diagram of a display driving module according to another exemplary embodiment;
fig. 5 is a schematic structural diagram of a display device according to an embodiment of the disclosure;
FIG. 6 is a schematic diagram of a liquid crystal alignment distribution of a pixel according to an exemplary embodiment;
FIG. 7 is a schematic diagram of a liquid crystal alignment distribution of a pixel according to another exemplary embodiment;
fig. 8 is a flowchart illustrating a display driving method according to an embodiment of the disclosure.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail hereinafter with reference to the accompanying drawings. Note that embodiments may be implemented in a number of different forms. One of ordinary skill in the art can readily appreciate the fact that the manner and content may be varied into a wide variety of forms without departing from the spirit and scope of the present disclosure. Accordingly, the present disclosure should not be construed as being limited to the following description of the embodiments. Embodiments of the present disclosure and features of embodiments may be combined with each other arbitrarily without conflict. In order to keep the following description of the embodiments of the present disclosure clear and concise, the present disclosure omits a detailed description of some known functions and known components. The drawings of the embodiments of the present disclosure relate only to the structures related to the embodiments of the present disclosure, and other structures may be referred to in general
In the drawings, the size of each constituent element, the thickness of a layer, or a region may be exaggerated for clarity. Accordingly, one aspect of the present disclosure is not necessarily limited to this dimension, and the shapes and sizes of the various components in the drawings do not reflect actual proportions. Further, the drawings schematically show ideal examples, and one mode of the present disclosure is not limited to the shapes or numerical values shown in the drawings, and the like.
The ordinal numbers of "first", "second", "third", etc. in the present specification are provided to avoid mixing of constituent elements, and are not intended to be limited in number.
In the present specification, for convenience, words such as "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, which indicate an azimuth or a positional relationship, are used to describe positional relationships of constituent elements with reference to the drawings, only for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or elements referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus are not to be construed as limiting the present disclosure. The positional relationship of the constituent elements is appropriately changed according to the direction in which the respective constituent elements are described. Therefore, the present invention is not limited to the words described in the specification, and may be appropriately replaced according to circumstances.
In this specification, the terms "mounted," "connected," and "connected" are to be construed broadly, unless explicitly stated or limited otherwise. For example, it may be a fixed connection, a removable connection, or an integral connection; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intermediate members, or may be in communication with the interior of two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art in the specific context.
In this specification, "electrically connected" includes a case where constituent elements are connected together by an element having some electric action. The "element having a certain electric action" is not particularly limited as long as it can transmit and receive an electric signal between the constituent elements connected. Examples of the "element having some electric action" include not only an electrode and a wiring but also a switching element such as a transistor, a resistor, an inductor, a capacitor, other elements having various functions, and the like.
A liquid crystal display device may be a vertically aligned liquid crystal (Vertical Alignment, VA) display device. VA display device is widely used in various products at present because of the advantages of high contrast ratio, liquid crystal fast response and the like. However, since the liquid crystals in the VA display device are vertically aligned, the refractive indexes of the liquid crystal molecules are different in each direction, so that color cast of the VA display device occurs at different viewing angles, and the display effect of the VA display device is reduced.
An embodiment of the disclosure provides a display driving module, and fig. 1 is a schematic structural diagram of the display driving module provided in the embodiment of the disclosure. As shown in fig. 1, a display driving module provided in an embodiment of the present disclosure is configured to drive a display panel 100, and includes: a timing controller 10 and a gamma circuit 20. Wherein the timing controller 10 is arranged to generate a control signal S; the gamma circuit 20 is electrically connected to the timing controller 10 and is configured to output a first gamma reference voltage signal V1 or a second gamma reference voltage signal V2 for each display frame of the display panel according to the control signal, so that the display panel displays images according to different gamma reference voltage signals in adjacent display frames.
In one exemplary embodiment, the first gamma reference voltage signal and the second gamma reference voltage signal are different in voltage value.
In an exemplary embodiment, fig. 2 is a schematic diagram of gamma curves corresponding to two gamma reference voltage signals, as shown in fig. 2, a gamma is a gamma curve corresponding to a first gamma reference voltage signal V1, B gamma is a gamma curve corresponding to a second gamma reference voltage V2, and combed gamma is a gamma curve mixed according to display effects of a gamma and B gamma. As shown in fig. 2, the gray-scale brightness using a Gamma is greater than the gray-scale brightness using B Gamma at the same gray-scale.
In one exemplary embodiment, the display panel may be a liquid crystal display panel, for example, the display panel may be a VA display panel.
In one exemplary embodiment, a display panel has a plurality of pixel units thereon, each pixel unit having red, green, and blue sub-pixels of three different colors. The brightness of each sub-pixel is determined by the gamma reference voltage signal output by the gamma circuit.
In an exemplary embodiment, the gamma circuit functions to set a gamma reference voltage signal according to a gamma curve required for the display panel as a reference voltage for gray scale display of the display panel.
In one exemplary embodiment, the voltage values of the first and second gamma reference voltage signals are different such that the brightness of the display frame displayed according to the first gamma reference voltage signal is different from the brightness of the display frame displayed according to the second gamma reference voltage signal.
The display driving module provided in the embodiment of the disclosure is configured to drive a display panel, and includes: a timing controller configured to generate a control signal; and the gamma circuit is electrically connected with the time schedule controller and is used for outputting a first gamma reference voltage signal or a second gamma reference voltage signal in each display frame of the display panel according to the control signal so that the display panel displays images in adjacent display frames according to different gamma reference voltage signals. The gamma circuit in the disclosure outputs a first gamma reference voltage signal or a second gamma reference voltage signal at each display frame of the display panel, so that the brightness of images displayed by the display panel at adjacent display frames is different, and the color cast problem of different visual angles is improved from the superposition effect of time.
Fig. 3 is a schematic structural diagram of a display driving module according to an exemplary embodiment. As shown in fig. 3, in one exemplary embodiment, the gamma circuit 20 may include: a memory 21, a signal selector 22 and a first digital to analog converter 23.
In an exemplary embodiment, the memory 21 is configured to store a first gamma reference voltage signal and a second gamma reference voltage signal; a signal selector 22 electrically connected to the timing controller 10 and the memory 21, respectively, and configured to acquire the first gamma reference voltage signal or the second gamma reference voltage signal from the memory 21 according to the control signal; the first digital-to-analog converter 23 is electrically connected to the signal selector 22 and is configured to digital-to-analog convert the signal obtained by the signal selector 22.
In one exemplary embodiment, the first gamma reference voltage signal and the second gamma reference voltage signal are digital signals.
In one exemplary embodiment, the first gamma reference voltage signal includes: a plurality of first reference voltage signals, the second gamma reference voltage signals comprising: a plurality of second reference voltage signals; the plurality of first reference voltage signals and the plurality of second reference voltage signals correspond to a plurality of gray scales, respectively.
For each gray level, the voltage value of the corresponding first reference voltage signal is greater than or equal to the voltage value of the corresponding second binding voltage signal.
In an exemplary embodiment, the control signal may be a square wave signal.
In one exemplary embodiment, the square wave signal is a first level signal at an odd display frame of the display panel and a second level signal at an even frame of the display panel.
In an exemplary embodiment, the logic level of the first level signal is different from the logic level of the second level signal.
In one exemplary embodiment, the logic level of the first level signal is 1 and the logic level of the second level signal is 0; alternatively, the logic level of the first level signal is 0 and the logic level of the second level signal is 1.
In an exemplary embodiment, the signal selector 22 is configured to receive a square wave signal, obtain a first gamma reference voltage signal from the memory 21 in a state where the square wave signal is a first level signal, and obtain a second gamma reference voltage signal from the memory 21 in a state where the square wave signal is a second level signal.
In an exemplary embodiment, the timing controller is further configured to acquire the first color data signal D1, and acquire the second color data signal D2 according to the first color data signal and a gamma curve of the display panel.
In one exemplary embodiment, the timing controller corrects the first color data using a digital gamma correction algorithm to obtain the second color data signal.
In one exemplary embodiment, the first color data signal is an externally input color data signal.
In one exemplary embodiment, the first color data signal and the second color data signal are digital signals.
Fig. 4 is a schematic structural diagram of a display driving module according to another exemplary embodiment, and as shown in fig. 4, the display driving module may further include: a source driver 30. The source driver 30 is configured to supply a data signal to the display panel 100.
In an exemplary embodiment, taking an 8-bit source driver as an example, 256 gray scale analog voltages are required to be set by the 8-bit source driver, so that the source driver can make 256 internal resistances according to the gamma curve of the display panel so as to generate all gray scale voltages. At this time, the gamma circuit provides a gamma reference voltage signal as a reference for the gray scale analog voltage, and the sub-divided voltage is generated by the internal resistance voltage division in the source driver. Taking the example of 18 paths of display products, that is, the first gamma reference voltage signal and the second gamma reference voltage signal each include 18 reference voltages, table 1 shows the correspondence between the punctuation voltages and the gray scale.
TABLE 1
As shown in table 1, the ninth reference voltage Gamma9 and the tenth reference voltage Gamma10 correspond to 0 gray scale, wherein the ninth reference voltage Gamma9 is a positive polarity voltage and the tenth reference voltage Gamma10 is a negative polarity voltage; the eighth reference voltage Gamma8 and the eleventh reference voltage Gamma11 correspond to 1 gray scale, wherein the eighth reference voltage Gamma8 is positive polarity voltage, and the eleventh reference voltage Gamma11 is negative polarity voltage; the seventh reference voltage Gamma7 and the twelfth reference voltage Gamma12 correspond to 31 gray scales, wherein the seventh reference voltage Gamma7 is positive polarity voltage, and the twelfth reference voltage Gamma12 is negative polarity voltage; the sixth reference voltage Gamma6 and the thirteenth reference voltage Gamma13 correspond to 63 gray scales, wherein the sixth reference voltage Gamma6 is positive polarity voltage, and the thirteenth reference voltage Gamma13 is negative polarity voltage; the fifth reference voltage Gamma5 and the fourteenth reference voltage Gamma14 correspond to 127 gray scales, wherein the fifth reference voltage Gamma5 is positive polarity voltage, and the fourteenth reference voltage Gamma14 is negative polarity voltage; the fourth reference voltage Gamma4 and the fifteenth reference voltage Gamma15 correspond to 191 gray scales, wherein the fourth reference voltage Gamma4 is positive polarity voltage, and the fifteenth reference voltage Gamma15 is negative polarity voltage; the third reference voltage Gamma3 and the sixteenth reference voltage Gamma16 correspond to 223 gray scales, wherein the third reference voltage Gamma3 is positive polarity voltage, and the sixteenth reference voltage Gamma16 is negative polarity voltage; the second reference voltage Gamma2 and the seventeenth reference voltage Gamma17 correspond to 254 gray scales, wherein the second reference voltage Gamma2 is positive polarity voltage, and the seventeenth reference voltage Gamma17 is negative polarity voltage; the first reference voltage Gamma1 and the eighteenth reference voltage Gamma18 correspond to 255 gray scales, wherein the second reference voltage Gamma1 is a positive polarity voltage, and the eighteenth reference voltage Gamma18 is a negative polarity voltage.
In an exemplary embodiment, the source driver 30 is electrically connected to the gamma circuit 20, the timing controller 10, and the display panel 40, respectively, and is configured to generate an analog data signal according to the signal output from the gamma circuit 20 and the second color data signal, and output the analog data signal to the display panel 40.
In one exemplary embodiment, as shown in fig. 4, the source driver 30 includes: a serial-to-parallel converter 31, a second digital-to-analog converter 32 and a buffer 33.
In an exemplary embodiment, the serial-to-parallel converter 31 is connected to the timing controller 10 and is configured to serial-parallel the second color data signal.
In an exemplary embodiment, a second digital-to-analog converter 32 is connected to the serial-to-parallel converter 31 and the first digital-to-analog converter 23, respectively, and is configured to digital-to-analog convert the signal output by the serial-to-parallel converter based on the signal output by the first digital-to-analog converter 23 and the second color data signal.
In an exemplary embodiment, a buffer 33 is electrically coupled to the second digital-to-analog converter 32 and configured to store the digital signal after digital-to-analog conversion by the second digital-to-analog converter 32.
In one exemplary embodiment, a display panel includes: and a plurality of data lines extending in a vertical direction.
In one exemplary embodiment, as shown in fig. 4, the source driver may further include: a multiplexing circuit 34. The multiplexing circuit 34 is connected to the buffer 33 and the display panel 40, and configured to output the digital signal stored in the buffer 33 to the data line of the display panel in a time-sharing manner.
The display driving module provided by the disclosure adopts different gamma reference voltage signals in different display frames. The method comprises the steps that a first gamma reference voltage signal is called for an odd display frame to be input into a source driver, the voltage of the first gamma reference voltage signal is set to be higher, when the first gamma reference voltage signal is adopted for displaying, the brightness of a display panel is higher, a second gamma reference voltage signal is called for an even display frame to be input into the source driver, the voltage of the second gamma reference voltage signal is set to be lower, and when the second gamma reference voltage signal is adopted for displaying, the brightness of the display panel is lower. Because the frequency of the human eyes for identifying the consecutive images is 24hz, when the display panel works at a high refresh frequency, the human eyes cannot identify slight brightness change, so that the display effect finally seen by the human eyes is the effect after the brightness of 2 adjacent frames is neutralized, and the color cast of the display panel is improved.
In an exemplary embodiment, the display driving module may further include: the scan driver, the display panel may further include: a plurality of scan lines, a scan driver configured to supply scan signals to the scan lines. Wherein the timing controller may further supply a clock signal, a scan start signal, etc. suitable for the specification of the scan driver to the scan driver. Wherein the scan driver may generate the scan signal to be supplied to the scan line by receiving a clock signal, a scan start signal, etc. from the timing controller. For example, the scan driver may sequentially supply scan signals having on-level pulses to the scan lines. For example, the scan driver may be configured in the form of a shift register, and may generate the scan signal in such a manner that the scan start signal supplied in the form of an on-level pulse is sequentially transmitted to the next stage circuit under the control of the clock signal.
The embodiment of the present disclosure further provides a display device, and fig. 5 is a schematic structural diagram of the display device provided by the embodiment of the present disclosure, as shown in fig. 5, where the display device provided by the embodiment of the present disclosure may include: a display panel 100 and a display driving module 200. The display driving module 200 is electrically connected to the display panel 100.
In one exemplary embodiment, the display device may be a 4K display device or an 8K display device.
In an exemplary embodiment, the display device may be any large-sized product or component with display function, such as a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, etc. Other essential components of the display device will be understood by those skilled in the art, and are not described herein in detail, nor should they be considered as limiting the invention.
The display driving module is the display driving module provided in any one of the foregoing embodiments, and the implementation principle and the implementation effect are similar, and are not described herein again.
In one exemplary embodiment, the display panel may be a liquid crystal display panel, such as a vertically aligned liquid crystal display panel.
In one exemplary embodiment, the liquid crystal display panel includes a face polarizer, a liquid crystal cell, and a bottom polarizer, which are sequentially attached from top to bottom. The surface polaroid is attached to the upper surface of the liquid crystal box, and the bottom polaroid is attached to the lower surface of the liquid crystal box.
In one exemplary embodiment, a liquid crystal cell includes a first substrate, a liquid crystal layer, a second substrate, and a sealant frame. The first substrate may be an array substrate, and the second substrate may be a color film substrate. The outer side surface of the first substrate is attached to the surface polaroid, and the outer side surface of the second substrate is attached to the bottom polaroid. The outer side surface refers to the side far away from the liquid crystal layer
In one exemplary embodiment, the dielectric anisotropy of the liquid crystal molecules of the liquid crystal layer is negative, and the liquid crystal molecules have a vertically aligned structure.
In one exemplary embodiment, upper and lower surfaces of the liquid crystal layer in a vertically aligned structure are respectively sealed by a sealant frame. The sealant frame is connected between the first substrate and the second substrate to seal the liquid crystal molecules of the liquid crystal layer between the first substrate and the second substrate
In one exemplary embodiment, a liquid crystal display panel may include: a plurality of pixels; at least one pixel includes at least one liquid crystal orientation therein. One liquid crystal alignment may be included in at least one subpixel, or a plurality of liquid crystal alignments may be included.
The side-view color shift problem of the display panel can be improved when a plurality of liquid crystal orientations are included in at least one pixel in the present disclosure.
Fig. 6 is a schematic diagram of a liquid crystal alignment distribution of a pixel provided by an exemplary embodiment, and fig. 7 is a schematic diagram of a liquid crystal alignment distribution of a pixel provided by another exemplary embodiment. As shown in fig. 6 and 7, in one exemplary embodiment, four liquid crystal orientations may be included in at least one pixel, or eight liquid crystal orientations may be included, which is not limited in this disclosure. Fig. 6 is an illustration of four liquid crystal orientations included in a pixel, and fig. 7 is an illustration of eight liquid crystal orientations included in a pixel.
The embodiment of the disclosure also provides a display driving method, which is applied to the display driving module, and fig. 8 is a schematic flow chart of the display driving method provided by the embodiment of the disclosure. As shown in fig. 8, the display driving method provided by the embodiment of the present disclosure may include the following steps:
and S1, generating a control signal.
And S2, outputting a first gamma reference voltage signal or a second gamma reference voltage signal in each display frame of the display panel according to the control signal, so that the display panel displays images in adjacent display frames according to different gamma reference voltage signals.
The display driving module is the display driving module provided in any one of the foregoing embodiments, and the implementation principle and the implementation effect are similar, and are not described herein again.
In an exemplary embodiment, step S2 may include the steps of:
step S21, storing the first gamma reference voltage signal and the second gamma reference voltage signal.
Step S22, according to the control signal, a first gamma reference voltage signal or a second gamma reference voltage signal is obtained.
Step S23, digital-to-analog conversion is carried out on the acquired signals.
In an exemplary embodiment, the control signal is a square wave signal, the square wave signal is a first level signal in an odd display frame of the display panel, and the square wave signal is a second level signal in an even frame of the display panel, and the step S22 may include:
the method comprises the steps of receiving a square wave signal, acquiring a first gamma reference voltage signal from a memory in a state that the square wave signal is a first level signal, and acquiring a second gamma reference voltage signal from the memory in a state that the square wave signal is a second level signal.
The drawings in the present disclosure relate only to structures to which embodiments of the present disclosure relate, and other structures may be referred to as general designs.
In the drawings for describing embodiments of the present disclosure, thicknesses and dimensions of layers or microstructures are exaggerated for clarity. It will be understood that when an element such as a layer, film, region or substrate is referred to as being "on" or "under" another element, it can be "directly on" or "under" the other element or intervening elements may be present.
While the embodiments disclosed in the present disclosure are described above, the embodiments are only employed for facilitating understanding of the present disclosure, and are not intended to limit the present disclosure. Any person skilled in the art to which this disclosure pertains will appreciate that numerous modifications and changes in form and details can be made without departing from the spirit and scope of the disclosure, but the scope of the disclosure is to be determined by the appended claims.
Claims (12)
1. A display driving module configured to drive a display panel, comprising:
the time sequence controller is arranged to generate a control signal, is also arranged to acquire a first color data signal, acquires a second color data signal according to the first color data signal, and corrects the first color data signal by adopting a digital gamma correction algorithm to acquire the second color data signal;
a gamma circuit electrically connected to the timing controller and configured to output a first gamma reference voltage signal or a second gamma reference voltage signal at each display frame of the display panel according to the control signal, so that the display panel displays an image according to different gamma reference voltage signals at adjacent display frames;
a source driver electrically connected to the gamma circuit, the timing controller, and the display panel, respectively, configured to generate an analog data signal according to a signal output from the gamma circuit and the second color data signal, and output the analog data signal to the display panel;
wherein the voltage values of the first gamma reference voltage signal and the second gamma reference voltage signal are different;
the display panel is a liquid crystal display panel, the liquid crystal display panel includes: a plurality of pixels; at least one pixel includes a plurality of liquid crystal orientations therein;
the gamma circuit includes:
a memory configured to store the first gamma reference voltage signal and the second gamma reference voltage signal;
a signal selector electrically connected to the memory and configured to acquire the first gamma reference voltage signal or the second gamma reference voltage signal from the memory according to the control signal;
the first digital-to-analog converter is electrically connected with the signal selector and is used for performing digital-to-analog conversion on the signals acquired by the signal selector;
the first gamma reference voltage signal includes: a plurality of first reference voltage signals, the second gamma reference voltage signals comprising: a plurality of second reference voltage signals; the first reference voltage signals and the second reference voltage signals correspond to gray scales respectively;
for each gray level, the voltage value of the corresponding first reference voltage signal is greater than or equal to the voltage value of the corresponding second binding voltage signal.
2. The display drive module of claim 1, wherein the first gamma reference voltage signal and the second gamma reference voltage signal are digital signals.
3. The display driving module according to claim 1, wherein the control signal is a square wave signal.
4. A display driving module according to claim 3, wherein the square wave signal is a first level signal in an odd display frame of the display panel and is a second level signal in an even frame of the display panel;
the logic level of the first level signal is different from the logic level of the second level signal.
5. The display driving module according to claim 4, wherein the logic level of the first level signal is 1 and the logic level of the second level signal is 0;
alternatively, the logic level of the first level signal is 0, and the logic level of the second level signal is 1.
6. The display driving module according to claim 4 or 5, wherein the signal selector is configured to receive the square wave signal, acquire the first gamma reference voltage signal from the memory in a state where the square wave signal is the first level signal, and acquire the second gamma reference voltage signal from the memory in a state where the square wave signal is the second level signal.
7. The display drive module of claim 1, wherein the first color data signal and the second color data signal are digital signals.
8. The display driving module according to claim 1, wherein the source driver comprises:
a serial-to-parallel converter connected to the timing controller and configured to serial-to-parallel convert the second color data signal;
the second digital-to-analog converter is respectively connected with the serial-to-parallel converter and the first digital-to-analog converter and is used for carrying out digital-to-analog conversion on the signal output by the serial-to-parallel converter according to the signal output by the first digital-to-analog converter and the second color data signal;
and the buffer is electrically connected with the second digital-to-analog converter and is used for storing the digital signals after the digital-to-analog conversion of the second digital-to-analog converter.
9. The display drive module of claim 8, wherein the display panel comprises: a plurality of data lines, the source driver further comprising:
and the multiplexing output circuit is respectively connected with the buffer and the display panel and is used for outputting the digital signals stored in the buffer to the data lines of the display panel.
10. A display device, comprising: a display panel and a display driving module according to any one of claims 1 to 9;
the display driving module is electrically connected with the display panel.
11. A display driving method, applied to the display driving module set according to any one of claims 1 to 9, comprising:
generating a control signal;
outputting a first gamma reference voltage signal or a second gamma reference voltage signal at each display frame of the display panel according to the control signal, so that the display panel displays images according to different gamma reference voltage signals at adjacent display frames;
the outputting the first gamma reference voltage signal or the second gamma reference voltage signal at each display frame of the display panel according to the control signal includes:
storing the first gamma reference voltage signal and the second gamma reference voltage signal;
acquiring the first gamma reference voltage signal or the second gamma reference voltage signal according to the control signal;
and D, performing digital-to-analog conversion on the acquired signals.
12. The method of claim 11, wherein the control signal is a square wave signal, the square wave signal being a first level signal in odd numbered display frames of the display panel, and the square wave signal being a second level signal in even numbered frames of the display panel;
the obtaining the first gamma reference voltage signal or the second gamma reference voltage signal according to the control signal includes:
and receiving the square wave signal, acquiring the first gamma reference voltage signal from the memory in the state that the square wave signal is the first level signal, and acquiring the second gamma reference voltage signal from the memory in the state that the square wave signal is the second level signal.
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