CN112687241B - Liquid crystal display screen, display method and method for determining driving signal - Google Patents
Liquid crystal display screen, display method and method for determining driving signal Download PDFInfo
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- CN112687241B CN112687241B CN202011599152.XA CN202011599152A CN112687241B CN 112687241 B CN112687241 B CN 112687241B CN 202011599152 A CN202011599152 A CN 202011599152A CN 112687241 B CN112687241 B CN 112687241B
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Abstract
The embodiment of the invention relates to the technical field of liquid crystal display screens, in particular to a liquid crystal display screen, a display method and a method for determining a driving signal. The method comprises the following steps: a liquid crystal panel and a driving chip; the driving chip is used for providing scanning signals and data signals for the pixel array in the liquid crystal panel; under the action of the scanning signal, at least the gating duration of a first pixel region is longer than the gating duration of a second pixel region, and the data input duration of the first pixel region is longer than the data input duration of the second pixel region under the action of the data signal; the distance between the first pixel region and the driving chip is far away from the distance between the second pixel region and the driving chip. Therefore, the charging time of the area far away from the driving end is prolonged, the liquid crystal charging time of all areas of the full screen is enabled to be consistent, and the problems of inconsistent brightness and color cast caused by insufficient charging are solved.
Description
Technical Field
The embodiment of the invention relates to the technical field of liquid crystal display screens, in particular to a liquid crystal display screen, a display method and a method for determining a driving signal.
Background
With the fact that the resolution and the refresh rate of an LCD (Liquid Crystal Display) are higher and higher, the charging time of Liquid Crystal is shortened, and the turn-on time of Liquid Crystal is shortened, which finally causes the inconsistency of brightness and chromaticity of the same image content in different areas of a screen, and affects user experience.
The existing solution is to output stronger signal strength to improve by adopting an overdrive mode, which can make the signal strength larger to improve the problem that the signal becomes slow in the flipping process. However, the driving voltage cannot be increased without limit, and thus the problem of inconsistent luminance and chromaticity expressed in different areas of the screen cannot be fundamentally solved.
In summary, there is a need for a liquid crystal display, a display method and a method for determining driving signals for solving the problem of inconsistent brightness and chromaticity in different areas of the screen.
Disclosure of Invention
The embodiment of the invention provides a liquid crystal display screen, a display method and a method for determining a driving signal, which are used for solving the problem that the brightness and the chroma of different areas of the screen are not consistent.
An embodiment of the present invention provides a liquid crystal display, including: a liquid crystal panel and a driving chip;
the driving chip is used for providing scanning signals and data signals for the pixel array in the liquid crystal panel; under the action of the scanning signal, at least the gating duration of a first pixel region is longer than the gating duration of a second pixel region, and the data input duration of the first pixel region is longer than the data input duration of the second pixel region under the action of the data signal; the distance between the first pixel region and the driving chip is longer than that between the second pixel region and the driving chip;
the liquid crystal panel is used for displaying under the driving of the driving chip.
By changing the time sequence of the pixel area far away from the driving chip, the gating duration and the data input duration of the first pixel area far away from the driving chip are respectively longer than the gating duration and the data input duration of the second pixel area, so that the charging duration of the area far away from the driving end is increased, the problems of low charging caused by high resolution and refresh rate and R/C parasitic parameters of a liquid crystal panel at the far driving end are solved, the liquid crystal charging time of all areas of the full screen tends to be consistent, and the problems of inconsistent brightness and color cast caused by low charging are solved.
Optionally, the driving chip includes a signal generator, a gate driver, and a source driver;
the signal generator is used for generating control signals and inputting the control signals into the gate driver and the source driver respectively;
the gate driver is used for generating the scanning signal according to the control signal;
the source driver is used for generating the data signal according to the control signal.
The gate driver and the source driver generate the scan signal and the data signal according to the timing of the control signal by generating the control signal by the signal generator and inputting the control signal to the gate driver and the source driver. Therefore, the scanning signals and the data signals can be adjusted only by adjusting the time sequence of the control signals, so that the gating duration and the data input duration of the pixel regions with different distances from the driving chip are different, the charging duration of the region far away from the driving end is increased, and the problem of inconsistent brightness and chromaticity of the liquid crystal display screen is solved.
Optionally, the scanning signal is to gate the pixel array by rows;
the scanning signals are used for providing gating duration for pixel areas of different rows in the pixel array which are not completely the same; the gating duration and the distance from the driving chip are in a positive relation;
the data signals are used for providing data input duration for pixel regions of different rows in the pixel array, wherein the data input duration is not completely the same; the data input duration and the distance from the driving chip are in a positive relation.
By flexibly configuring the gating duration and the data input duration of any scanning line, the gating duration and the data input duration of the scanning line far away from the driving chip are longer than those of the scanning line close to the driving chip. Therefore, the problems of high resolution and refresh rate and insufficient charging caused by R/C parasitic parameters of the liquid crystal panel of the far-driving end are solved by the increased data driving time length, so that the liquid crystal charging time of all areas of the full screen tends to be consistent, and the problems of inconsistent brightness and color cast caused by insufficient charging are solved.
Optionally, the charging duration of each pixel region in the pixel array under the action of the scanning signal and the data signal meets the requirement of display equalization.
The charging duration of each pixel region meets the requirement of display balance, so that the brightness of each pixel region of the full screen is not different due to different distances from the driving end, the brightness and the chromaticity of the full screen tend to be consistent, and the user experience is improved.
The embodiment of the invention also provides a display method, which comprises the following steps:
a driving chip of the liquid crystal display screen generates a scanning signal and a data signal;
the liquid crystal panel of the liquid crystal display screen displays under the driving of the scanning signal and the data signal; under the action of the scanning signal, at least the gating duration of a first pixel region is longer than the gating duration of a second pixel region, and the data input duration of the first pixel region is longer than the data input duration of the second pixel region under the action of the data signal; the distance between the first pixel region and the driving chip is far away from the distance between the second pixel region and the driving chip.
Optionally, the driving chip includes a signal generator, a gate driver, and a source driver;
the drive chip of the liquid crystal display screen generates scanning signals and data signals, and comprises:
the signal generator generates control signals and inputs the control signals into the gate driver and the source driver respectively;
the gate driver generates the scan signal according to the control signal;
the source driver generates the data signal according to the control signal.
Optionally, the scanning signal is to gate the pixel array by rows;
the gating duration provided by the scanning signals for the pixel areas of different rows in the pixel array is not completely the same; the gating duration and the distance from the driving chip are in a positive relation;
the data input time lengths of the data signals provided for the pixel areas of different rows in the pixel array are not completely the same; the data input duration and the distance from the driving chip are in a forward relation.
The embodiment of the invention also provides a method for determining the driving signal, which comprises the following steps:
generating a scanning signal and a data signal through a driving chip of the liquid crystal display screen according to a driving rule;
collecting display data of a liquid crystal panel of the liquid crystal display screen in different areas;
and adjusting the driving rule according to the display data of the different areas, and returning to the step of generating scanning signals and data signals through a driving chip of the liquid crystal display screen according to the driving rule until the display data of the liquid crystal display screen meets the display balance requirement.
The display data can reflect the charging time of the liquid crystal to a certain extent, and the driving rules are adjusted and compensated according to the actual data of different areas by acquiring the actual brightness and chromaticity data of the liquid crystal panel in different areas, so that the signal time sequences of different areas are different, and the problem of insufficient charging time of the remote driving end is solved. And the accuracy of the rule formulation is fed back and driven through the display data, so that the full-screen display data tends to be consistent through the cyclic adjustment.
Optionally, the different regions comprise an adjustment region and a target region; the target area is positioned in the middle of the liquid crystal panel;
the step of adjusting the driving rule according to the display data of the different regions and returning to the step of generating the scanning signal and the data signal through the driving chip of the liquid crystal display screen according to the driving rule until the display data of the liquid crystal display screen meets the display balance requirement comprises the following steps:
if the brightness data of the adjusting area is higher than that of the target area, shortening the gating duration and the data input duration of the adjusting area;
if the brightness data of the adjusting area is lower than that of the target area, increasing the gating duration and the data input duration of the adjusting area;
until the deviation between the brightness data of the adjusting area and the brightness data of the target area is smaller than a set threshold value.
Because the eyes of people who watch scenes in daily life are always positioned in the right center area of the screen, the target area is set to be positioned in the middle of the liquid crystal panel, the display data of other areas are adjusted according to the display data of the target area, the adjustment range of each adjustment area can be reduced, and the full-screen display data can be more easily consistent. In addition, the gating duration and the data input duration of the adjusting area with the brightness data higher than the target area are increased, and the gating duration and the data input duration of the adjusting area with the brightness data lower than the target area are shortened, so that the signal time sequences of different adjusting areas are different, the problem of insufficient charging time of a far driving end is solved, and the brightness data of the full screen tend to be consistent.
Embodiments of the present invention further provide a computer-readable storage medium, which stores a computer-executable program, where the computer-executable program is used to enable a computer to execute any one of the above listed methods for determining a driving signal.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a block diagram illustrating an exemplary hardware configuration of a possible lcd screen 100 according to an embodiment of the present invention;
FIG. 2 illustrates the effect of parasitic parameters on scan signals and data signals;
fig. 3 exemplarily shows signal changes of scan signals, data signals with an increase of the number of rows, and a variation of charging time of TFTs caused thereby;
fig. 4 is a block diagram of another possible hardware configuration of the lcd panel 100 according to the embodiment of the present invention;
FIG. 5 shows a graph of pulse signals after adjustment of strobe duration and data input duration;
FIG. 6 illustrates a method for determining a driving signal according to an embodiment of the present invention;
fig. 7 is an example of dividing regions of a liquid crystal panel when determining a driving signal according to an embodiment of the present invention.
Detailed Description
To make the objects, embodiments and advantages of the present application clearer, the following description of exemplary embodiments of the present application will clearly and completely describe the exemplary embodiments of the present application with reference to the accompanying drawings in the exemplary embodiments of the present application, and it is to be understood that the described exemplary embodiments are only a part of the embodiments of the present application, and not all of the embodiments.
All other embodiments, which can be derived by a person skilled in the art from the exemplary embodiments described herein without inventive step, are intended to be within the scope of the claims appended hereto. In addition, while the disclosure herein has been presented in terms of one or more exemplary examples, it should be appreciated that aspects of the disclosure may be implemented solely as a complete embodiment.
It should be noted that the brief descriptions of the terms in the present application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of the present application. These terms should be understood in their ordinary and customary meaning unless otherwise indicated.
The terms "first," "second," "third," and the like in the description and claims of this application and in the above-described drawings are used for distinguishing between similar or analogous objects or entities and are not necessarily intended to limit the order or sequence of any particular one, Unless otherwise indicated. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.
Furthermore, the terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a product or device that comprises a list of elements is not necessarily limited to those elements explicitly listed, but may include other elements not expressly listed or inherent to such product or device.
Fig. 1 schematically shows a block diagram of a hardware configuration of a possible liquid crystal display screen 100 according to an embodiment of the present invention. The liquid crystal display panel 100 includes a liquid crystal panel 101 and a driving chip 102.
The liquid crystal panel 101 is composed of a backlight, optical components, and a liquid crystal substrate. The liquid crystal substrate is characterized in that two glass plates are used as substrates, the size of the flat glass is manufactured according to the size of a screen, then the two glass plates are manufactured into a flat box, and TN type liquid crystal is filled in the box. The liquid crystal television utilizes orderly change of arrangement direction of nematic liquid crystal molecules under the action of an electric field and a magnetic field, adopts a strict time sequence control technology to control the liquid crystal molecules on a screen to realize modulation of backlight flux, thereby showing brightness and darkness or permeation and non-permeation on the screen, forming RGB pixel points through a color film, and displaying imaging by utilizing inertia and color mixing principles of human eyes. Each image point on the liquid crystal screen is independently controlled by an electric field, and different pixel areas display characters, numbers or figures on the display screen according to the command of the driving signal of the driving chip 102.
And a substrate is made on the rear glass substrate, transparent electrodes which are mutually insulated in the horizontal and vertical directions are made according to the distribution rule of sub-pixels, TFT transistors are made at the intersection of the horizontal line and the vertical line, the G pole of each TFT transistor is connected with a scanning signal electrode output by the driving chip 102, the S pole of each TFT transistor is connected with a data signal electrode output by the driving chip 102, and the D pole of each TFT transistor is connected on the substrate. A plurality of transparent electrodes are arranged on the front glass substrate in a small grid according to the sub-pixel distribution of the rear glass substrate, but the voltages applied by the electrodes are the same as VCOM and are used as a common electrode. And the front surface of the front glass substrate is pasted with a color filter film arranged according to RGB sub-pixels. When G, S paths of signals of a certain TFT meet, the corresponding TFT tube works, S-pole voltage is applied to the D electrode and forms voltage difference with the common-pole voltage of the corresponding front glass substrate, an electric field is established on the corresponding liquid crystal molecules to rotate, white light penetrates through the optical component and the liquid crystal layer, and then forms red, green or blue light emitting small points through the color film.
Taking an example of a liquid crystal panel with a physical resolution of 1024 × 768, the whole liquid crystal panel is divided into 768 lines from top to bottom, each line has 1024 groups of pixels, each group of pixels is composed of RGB sub-pixels, so 3072 sub-pixels are provided in a line, therefore, 3072 TFT tubes are provided in a line, and the sub-pixels in each line are defined and arranged in a controlled manner according to the sequence of RGBRGB. Namely: a liquid crystal panel of 1024X 768 is provided with 1024X 768X 3 TFT tubes on the back glass substrate.
The formula for calculating the scan time per line is generally: the scanning time per line is 1S/refresh frame rate/line scanning number.
Therefore, the effective scanning time of each line of the full high-definition FHD liquid crystal panel with the resolution of 1920x1080/60HZ is about 15 mus;
the effective scanning time of each line of the ultra-high-definition UHD liquid crystal panel with the resolution of 3840x2160/60HZ is about 7.7 mu s;
the effective scanning time of each line of the 8K ultra-high definition UHD liquid crystal panel with the resolution of 7680x4320/60HZ is about 3.8 mus;
it can be seen that when the screen is small and the resolution is low, the liquid crystal still has enough time to be charged, and the screen does not have the problem of abnormal display. However, as the resolution and the refresh rate increase, the line scanning time is shorter and shorter, and the liquid crystal charging time is shorter and shorter, which is one of the reasons for insufficient charging;
meanwhile, as the resolution is increased, the number of circuits and wires in the liquid crystal panel is increased, and the circuits are mounted on the original driving lines, which causes the parasitic R/C (Resistance/Capacitance) parameters of the driving transmission lines to be deteriorated. The effect of parasitic parameters on scan signals and data signals is shown in fig. 2. The farther from the driving chip, the slower the rising and falling edges of the scan signal and the data signal become, so that the farther from the driving chip, the shorter the liquid crystal is turned on, and the luminance is poorer compared to the near driving end. Taking the case of row driving as double-side driving and column driving as single-side driving, the schematic diagram of the far driving end is shown in fig. 1, and the area is inconsistent with the luminance and chromaticity of the near driving end due to insufficient liquid crystal charging. Therefore, the brightness and chromaticity of the same image content appearing in different areas of the screen are not uniform.
Taking an 8K ultra high definition UHD liquid crystal panel with the resolution of 7680x4320/60HZ as an example, the scanning time of each line is calculated to be 3.8 mus according to a calculation formula of the line scanning time. Fig. 3 exemplarily shows signal changes of the scan signal, the data signal with an increase of the number of rows, and a variation of the charging time of the TFT caused thereby. It can be seen that the charging time of the TFT is shorter and shorter as the number of rows increases, for example, from the charging time of the first row of 2.8 μ s to the charging time of the 4320 th row of 2.3 μ s.
An embodiment of the present invention provides a liquid crystal display screen 100, including: a liquid crystal panel 101 and a driving chip 102;
a driving chip 102, configured to provide a scan signal and a data signal to a pixel array in a liquid crystal panel; under the action of a scanning signal, at least the gating duration of a first pixel region 1011 is longer than that of a second pixel region 1012, and under the action of the data signal, the data input duration of the first pixel region 1011 is longer than that of the second pixel region 1012; the distance between the first pixel region 1011 and the driving chip is longer than the distance between the second pixel region 1012 and the driving chip. Fig. 1 shows an example of positions of the first pixel region and the second pixel region on the liquid crystal panel, where the drawings are merely examples, and the embodiment of the present invention is not limited thereto.
By changing the time sequence of the pixel area far away from the driving chip, the gating duration and the data input duration of the first pixel area far away from the driving chip are respectively longer than the gating duration and the data input duration of the second pixel area, so that the charging duration of the area far away from the driving end is increased, the problems of low charging caused by high resolution and refresh rate and R/C parasitic parameters of a liquid crystal panel at the far driving end are solved, the liquid crystal charging time of all areas of the full screen tends to be consistent, and the problems of inconsistent brightness and color cast caused by low charging are solved.
As shown in fig. 4, the driving chip 102 includes a signal generator 1021, a gate driver 1022, a source driver 1023, and a power management unit 1024;
the signal generator 1021 is a core circuit for controlling the PANEL timing, and generates control signals required by the gate driver 1022 and the source driver 1023, and inputs the control signals to the gate driver 1022 and the source driver 1023, respectively. The method specifically comprises the following steps: controls when the gate driver 1022 is activated, converts an input video signal (e.g., LVDS signal) into a data signal form (e.g., mini-LVDS signal or RSDS signal) used by the source driver 1023, transfers to the source driver 1023, and controls the source driver 1023 to be activated at a proper time.
The power management unit 1024 is a microcontroller that controls the power functions of the digital platform. The microchip has many components similar to a general computer, including firmware and software, memory, a CPU, input/output functions, a timer for measuring time intervals, and an analog-to-digital converter for measuring the voltage of the main battery or power supply. The power management unit 1024 supplies power such as AVDD, DVDD, VGH, VGL, VCOM, GAMMA, etc. required by the panel, gate driver 1022, and source driver 1023.
The gate driver 1022 and the source driver 1023 are formed by bonding the driver ICs to a flexible film transfer tape and screen-printing them on ITO leads of the screen substrate (this flexible film transfer tape is also called a COF connector). Generally, the source driver 1023 is composed of a plurality of COFs like a panel of 1024 × 768, and if one data driving COF can output 384 electrode driving signals, 8 COF driving circuits are required.
A gate driver 1022 for generating a scan signal according to a control signal;
the source driver 1023 is used for generating a data signal according to the control signal.
As shown in fig. 4, driving signals for the G-pole and S-pole of the TFT transistor are provided by the gate driver 1022 and the source driver 1023, respectively. A TFT transistor is simply a switch made using a transistor. The main task of the driver is to determine whether the voltage on the source driver 1023 is charged to this point, and how high the voltage is charged to this point to display what gray level is determined by the external source driver 1023.
The gate driver and the source driver generate the scan signal and the data signal according to the timing of the control signal by generating the control signal by the signal generator and inputting the control signal to the gate driver and the source driver. Therefore, the scanning signals and the data signals can be adjusted only by adjusting the time sequence of the control signals, so that the gating duration and the data input duration of the pixel regions with different distances from the driving chip are different, the charging duration of the region far away from the driving end is increased, and the problem of inconsistent brightness and chromaticity of the liquid crystal display screen is solved.
On the basis of the liquid crystal display screen in fig. 4, another possible liquid crystal display screen is provided in the embodiment of the present invention. In the liquid crystal display panel, scanning signals are used for gating the pixel array according to rows;
the scanning signals are used for providing different gating time lengths for the pixel areas of different rows in the pixel array, wherein the gating time lengths are not completely the same; the gating duration and the distance from the driving chip are in a positive relation;
the data signals are used for providing data input duration for pixel regions of different rows in the pixel array, and the data input duration is not completely the same; the data input duration and the distance from the driving chip are in a forward relation.
Taking the resolution of an 8K ultra high definition UHD liquid crystal panel with a physical resolution of 7680x4320/60HZ as an example, if the gate duration and the data input duration of different scanning lines are the same, then: at a glance, we see a frame, which takes about 1s, in such a short time that the signal generator 1021 drives the screen to form the image, which is repeated at least 60 times (the frame frequency is 60Hz), and within sixty minutes, the frame is formed, which takes 16.67ms, and the gate driver 1022 sequentially sends 4320 scan pulses to the G electrodes of the TFT transistors, and the time taken for each line is 16.67ms/4320 ═ 3.8 μ s (the line frequency is 46 kHz). At the same time, signal generator 1021 also outputs 7680 × 3 columns of data signals to TFT S-electrode via source driver 1023 during 3.8 μ S of a row pulse. The data signal is decomposed and reduced into an S-pole driving signal for driving the TFT on the screen to work by the television picture through the logic board. The source driver 1023 charges the sub-pixels of an entire row to the respective voltages required to display different gray levels. When the row is charged, the gate driver 1022 starts outputting the next row of scanning driving signals, and the S electrode outputs the data signal continuously to light the sub-pixels in the second row, and so on until the last row is lighted.
If the gating duration and the data input duration of the pixel regions in different rows are set to be different, and the gating duration and the data input duration are in a forward relation with the distance from the driving chip, the gating duration and the data input duration of each row are correspondingly adjusted, which depends on the distance from the row to the driving chip. Fig. 5 shows a pulse diagram after adjusting the gate duration and the data input duration, and the adjustment of the timings of the scan signal and the data signal can be achieved by adjusting the timings of the control signal generated by the signal generator. As shown in fig. 5, compared with the original control signal, as the number of rows increases, the gating duration and the data input duration are gradually increased, so that the liquid crystal charging duration of the final far driving end and the liquid crystal charging duration of the near driving end tend to be consistent, and thus, the brightness of the full screen can be adjusted to tend to be consistent. The above are merely examples, and embodiments of the present invention are not limited thereto.
By flexibly configuring the gating duration and the data input duration of any scanning line, the gating duration and the data input duration of the scanning line far away from the driving chip are longer than those of the scanning line close to the driving chip. Therefore, the problems of high resolution and refresh rate and insufficient charging caused by R/C parasitic parameters of the liquid crystal panel of the far-driving end are solved by the increased data driving time length, so that the liquid crystal charging time of all areas of the full screen tends to be consistent, and the problems of inconsistent brightness and color cast caused by insufficient charging are solved.
Optionally, the charging duration of each pixel region in the pixel array under the action of the scan signal and the data signal meets the requirement of display equalization.
The charging duration of each pixel area meets the requirement of display balance, so that the brightness of each pixel area of the full screen is not different due to different distances from the driving end, the brightness and the chromaticity of the full screen tend to be consistent, and the user experience is improved.
The embodiment of the invention also provides a display method, which comprises the following steps:
a driving chip of the liquid crystal display screen generates a scanning signal and a data signal;
the liquid crystal panel of the liquid crystal display screen displays under the driving of the scanning signal and the data signal; under the action of the scanning signal, at least the gating duration of a first pixel region is longer than the gating duration of a second pixel region, and the data input duration of the first pixel region is longer than the data input duration of the second pixel region under the action of the data signal; the distance between the first pixel region and the driving chip is far away from the distance between the second pixel region and the driving chip.
Optionally, the driving chip includes a signal generator, a gate driver, and a source driver;
the driving chip of the liquid crystal display screen generates scanning signals and data signals, and the method comprises the following steps:
the signal generator generates control signals and inputs the control signals into the gate driver and the source driver respectively;
the gate driver generates the scan signal according to the control signal;
the source driver generates the data signal according to the control signal.
The order of generating the scan signal by the gate driver and the data signal by the source driver may be switched or performed simultaneously, which is not limited in the embodiments of the present invention.
Optionally, the scanning signal gates the pixel array by rows;
the gating duration provided by the scanning signals for the pixel areas of different rows in the pixel array is not completely the same; the gating duration and the distance from the driving chip are in a positive relation;
the data input time lengths of the data signals provided for the pixel areas of different rows in the pixel array are not completely the same; the data input duration and the distance from the driving chip are in a forward relation.
An embodiment of the present invention further provides a method for determining a driving signal, as shown in fig. 6, including:
601, generating a scanning signal and a data signal through a driving chip of the liquid crystal display screen according to a driving rule;
the display data may be the brightness, chromaticity, and the like of each region of the liquid crystal panel, which is not limited in this embodiment of the present invention.
The display data can reflect the charging time of the liquid crystal to a certain extent, and the driving rules are adjusted and compensated according to the actual data of different areas by acquiring the actual brightness and chromaticity data of the liquid crystal panel in different areas, so that the signal time sequences of different areas are different, and the problem of insufficient charging time of the remote driving end is solved. And the accuracy of the rule formulation is fed back and driven through the display data, so that the full-screen display data tends to be consistent through the cyclic adjustment.
Optionally, the different regions comprise an adjustment region and a target region; the target area is positioned in the middle of the liquid crystal panel;
the step of adjusting the driving rule according to the display data of the different regions and returning to the step of generating the scanning signal and the data signal through the driving chip of the liquid crystal display screen according to the driving rule until the display data of the liquid crystal display screen meets the display balance requirement comprises the following steps:
if the brightness data of the adjusting area is higher than that of the target area, shortening the gating duration and the data input duration of the adjusting area;
if the brightness data of the adjusting area is lower than that of the target area, increasing the gating duration and the data input duration of the adjusting area;
until the deviation between the brightness data of the adjusting area and the brightness data of the target area is smaller than a set threshold value.
In order to comprehensively explain the method for determining the driving signal, the full screen is divided into 9 areas, the number of the divided areas is merely an example, and the embodiment of the present invention is not limited thereto.
As shown in fig. 7, the liquid crystal panel 101 is equally divided into 9 regions, and the regions are designated as regions 1, 2, 3, 4, 5, 6, 7, 8, and 9 in order from the left to the right and from the top to the bottom, and then the region 5 enclosed by the dotted line is a target region, and the remaining 8 regions are adjustment regions.
Generating a scanning signal and a data signal through a driving chip of the liquid crystal display screen according to a driving rule;
the display data at this time is collected, for example, the brightness data of each region is 90%, 70%, 80%, 50%, 60%, and 50% in sequence, and the brightness data of the adjustment region is corrected by adjusting the gating duration and the data input duration respectively with the brightness data of the target region 5 as a standard. The method specifically comprises the following steps: the strobe duration and data input duration of the regions 1, 2, 3 are shortened, the strobe duration and data input duration of the regions 4, 7, 8, 9 are increased, the magnitude of the shortening and increasing depending on the difference between the luminance data thereof and the luminance data of the target region. Generating a scanning signal and a data signal again according to the adjusted driving rule, acquiring display data of different areas again, if the deviation between the brightness data of the adjusting area and the brightness data of the target area is smaller than a set threshold value, such as 5%, the driving rule is proved to be available, and the scanning signal and the data signal generated according to the driving rule can enable the brightness data of the full screen to be consistent; if the deviation between the brightness data of some areas in the adjusting area and the brightness data of the target area is larger than the set threshold value, the driving rule is proved to be still to be perfected, and therefore the driving rule is adjusted again. And repeating the steps in a circulating way until the deviation between the brightness data of all the adjusting areas and the brightness data of the target area is less than a set threshold value.
Because the eyes of people who watch scenes in daily life are always positioned in the right center area of the screen, the target area is set to be positioned in the middle of the liquid crystal panel, the display data of other areas are adjusted according to the display data of the target area, the adjustment range of each adjustment area can be reduced, and the full-screen display data can be more easily consistent. In addition, the gating duration and the data input duration of the adjusting area with the brightness data higher than the target area are increased, and the gating duration and the data input duration of the adjusting area with the brightness data lower than the target area are shortened, so that the signal time sequences of different adjusting areas are different, the problem of insufficient charging time of a far driving end is solved, and the brightness data of the full screen tend to be consistent.
Optionally, the driving rule is adjusted by any one or a combination of any several of the following:
linear changes, non-linear changes, stepped increases in zones, linear increases within zones, custom compensation starting lines and gain values.
For example, the linear variation may be that in a full screen range, the gating duration and the data input duration of each line linearly vary with the increase of the number of lines; the nonlinear change can be that in a full screen range, the gating duration of each line and the data input duration of each line are changed in other functional forms along with the increase of the number of lines; the step-type increase of the subareas can be that the full screen is divided into a plurality of areas, the gating duration and the data input duration in the areas are the same, and the gating duration and the data input duration in different areas are different; the linear increase in the area can be that the full screen is divided into a plurality of areas, the gating duration and the data input duration in the areas are linearly changed along with the increase of the number of lines, and the increment of the linear change among different areas can be set in a self-defined way; the custom compensation start line and the gain value can be custom for the start line of the strobe duration and data input duration change, and the gain value can also be custom, for example, the strobe duration and the data input duration of each line are increased by 0.1 μm from the 1000 th line. The above manner of adjusting the driving rule is only an example, and the embodiment of the present invention is not limited thereto.
The adjustment process is more regular by setting some adjustment modes, so that the adjustment accuracy is improved while the labor consumption in the process of adjusting the driving rule is saved. Meanwhile, several adjustment modes can be combined to adjust the driving rule of the full screen, different areas are suitable for different adjustment modes, the adjustment flexibility and the adaptability of the adjusted driving rule are improved, and the display data of the full screen can tend to be consistent.
Embodiments of the present invention also provide a computer-readable storage medium, which stores a computer-executable program for causing a computer to execute any one of the above-listed methods for determining a driving signal.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (3)
1. A method of determining a drive signal, comprising:
generating a scanning signal and a data signal through a driving chip of the liquid crystal display screen according to a driving rule; the driving chip is used for providing scanning signals and data signals for a pixel array in the liquid crystal panel; under the action of the scanning signal, at least the gating duration of a first pixel region is longer than the gating duration of a second pixel region, and the data input duration of the first pixel region is longer than the data input duration of the second pixel region under the action of the data signal; the distance between the first pixel region and the driving chip is longer than that between the second pixel region and the driving chip; the sum of the gating time length and the blanking time length of the scanning signal in the first pixel region is equal to the sum of the gating time length and the blanking time length of the scanning signal in the second pixel region; the liquid crystal panel is used for displaying under the driving of the driving chip;
collecting display data of a liquid crystal panel of the liquid crystal display screen in different areas;
adjusting the driving rule according to the display data of the different areas, and returning to the step of generating scanning signals and data signals through a driving chip of the liquid crystal display screen according to the driving rule until the display data of the liquid crystal display screen meets the display balance requirement;
the different areas comprise an adjustment area and a target area; the target area is positioned in the middle of the liquid crystal panel;
the step of adjusting the driving rule according to the display data of the different regions and returning to the step of generating the scanning signal and the data signal through the driving chip of the liquid crystal display screen according to the driving rule until the display data of the liquid crystal display screen meets the display balance requirement comprises the following steps:
if the brightness data of the adjusting area is higher than that of the target area, the gating duration and the data input duration of the adjusting area are shortened
If the brightness data of the adjusting area is lower than that of the target area, increasing the gating duration and the data input duration of the adjusting area;
until the deviation between the brightness data of the adjusting area and the brightness data of the target area is smaller than a set threshold value.
2. A computer-readable storage medium, characterized in that it stores a computer-executable program for causing a computer to execute the method of determining a drive signal set forth in claim 1.
3. A computing device, comprising:
a memory for storing a computer program;
a processor for calling a computer program stored in said memory, for executing the method of determining a drive signal according to claim 1 according to the obtained program.
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| CN113593466B (en) * | 2021-05-18 | 2024-02-09 | 昆山国显光电有限公司 | Display panel driving method, display device and storage medium |
| CN113643645A (en) * | 2021-10-18 | 2021-11-12 | 惠科股份有限公司 | Display panel, display panel driving method and display |
| CN114488593B (en) * | 2022-01-26 | 2023-10-10 | 长沙惠科光电有限公司 | Driving circuit of display panel, array substrate and display panel |
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| JP5017885B2 (en) * | 2006-03-02 | 2012-09-05 | 船井電機株式会社 | Liquid crystal display |
| KR101577829B1 (en) * | 2009-07-15 | 2015-12-15 | 엘지디스플레이 주식회사 | liquid crystal display |
| JP2011059658A (en) * | 2009-08-11 | 2011-03-24 | Sony Corp | Display device, display method, and computer program |
| TWI490846B (en) * | 2013-03-18 | 2015-07-01 | Chunghwa Picture Tubes Ltd | Display apparatus and driving method for display panel thereof |
| CN104361878B (en) * | 2014-12-10 | 2017-01-18 | 京东方科技集团股份有限公司 | Display panel and driving method thereof as well as display device |
| CN105139818B (en) * | 2015-09-29 | 2019-02-19 | 南京中电熊猫液晶显示科技有限公司 | A kind of driving method of liquid crystal display panel |
| TWI570700B (en) * | 2016-05-11 | 2017-02-11 | 友達光電股份有限公司 | Display device and method for driving the same |
| CN107045858B (en) * | 2016-12-02 | 2020-05-01 | 厦门天马微电子有限公司 | Driving method of liquid crystal display panel and liquid crystal display panel |
| CN106652955A (en) * | 2017-01-04 | 2017-05-10 | 京东方科技集团股份有限公司 | Drive circuit of display screen, display method and display device |
| CN206564122U (en) * | 2017-03-13 | 2017-10-17 | 昆山龙腾光电有限公司 | Driving chip and display device for display panel |
| CN108665861B (en) * | 2017-03-31 | 2021-01-26 | 京东方科技集团股份有限公司 | Display driving device, display driving method and display device |
| CN207833889U (en) * | 2017-10-31 | 2018-09-07 | 歌尔科技有限公司 | LCD driving circuits and LCD |
| CN109166553B (en) * | 2018-10-18 | 2021-01-29 | 业成科技（成都）有限公司 | Liquid crystal display device and driving method thereof |
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