CN114023275A - Driving method and driving device of backlight module - Google Patents
Driving method and driving device of backlight module Download PDFInfo
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- CN114023275A CN114023275A CN202111428508.8A CN202111428508A CN114023275A CN 114023275 A CN114023275 A CN 114023275A CN 202111428508 A CN202111428508 A CN 202111428508A CN 114023275 A CN114023275 A CN 114023275A
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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
- G09G3/3406—Control of illumination source
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
Abstract
The embodiment of the application discloses a driving method and a driving device of a backlight module. When the liquid crystal is in a transition state, although the backlight module is in a micro-lighting state and cannot enable the liquid crystal display panel to display pictures, the conductivity of the thin film transistors in all regions can be changed according to the fact that part of light irradiates the thin film transistors, and the characteristic difference among the thin film transistors is reduced, so that the problem of water ripples of the liquid crystal display panel under the MPRT function is solved, and the display effect of the liquid crystal display panel is improved.
Description
Technical Field
The present application relates to the field of display, and in particular, to a driving method and a driving apparatus for a backlight module.
Background
At present, with the higher requirement of the consumers for the image quality of the television display, a plurality of new display technologies appear, wherein the mini light emitting diode technology is receiving wide attention. The mini light emitting diode technology is mostly applied to the backlight part of the television, and the fine control of a tiny subarea can be realized through the driving system, so that the display effect which is comparable to that of the organic light emitting diode is achieved. In addition, the mini light emitting diode can be adjusted through a local dimming (Localdimming) technology to realize various functions. Among them, the tailing problem of the dynamic Picture can be solved by a Moving Picture Response Time (MPRT) function. Specifically, the MPRT function turns off the backlight when the liquid crystal is in the transition state, and turns on the backlight when the liquid crystal reaches the target state, so that the liquid crystal is covered during the turning process, and the problem of trailing of the dynamic picture can be solved.
However, in future liquid crystal display panel manufacturing processes, the process of 5 masks is gradually switched to the process of four masks for the purpose of reducing the cost. When the liquid crystal display panel is formed by adopting the four-photomask process, the conductivity of the thin film transistor device is changed after the thin film transistor device is illuminated due to the lack of one photomask. When the MPRT function is used, the backlight is completely turned off when the liquid crystal is in the state process, so that the tft in a local area of the liquid crystal display panel is not irradiated by light, and thus the conductivity of the tft is not changed, and a water ripple problem may occur.
Therefore, how to solve the problem of the water ripple of the liquid crystal display panel formed by adopting the four-mask process under the MPRT function is a difficult problem to be overcome by panel manufacturers.
Disclosure of Invention
The embodiment of the application provides a driving method and a driving device of a backlight module, which are used for solving the technical problem that a liquid crystal display panel formed by adopting four photomask processes in the prior art is easy to have water ripples under the MPRT function.
The embodiment of the application provides a driving method of a backlight module, and the driving method comprises the following steps:
detecting the state of the liquid crystal;
when the liquid crystal is in a stable state, outputting a first preset current to the backlight module so as to enable the backlight module to be in a normal lighting state;
when the liquid crystal is in a transition state, a second preset current is output to the backlight module, so that the backlight module is in a micro-lighting state.
Optionally, in some embodiments of the present application, the first preset current is greater than the second preset current.
Optionally, in some embodiments of the present application, the second preset current is in a range of 1.5 ma to 2.5 ma.
Optionally, in some embodiments of the present application, the first preset current is in a range from 20 ma to 30 ma.
Optionally, in some embodiments of the present application, the liquid crystal further includes a transition stage between a steady state and a transition state, and when the liquid crystal is in the transition stage, the current supplied to the backlight module is gradually increased from the first preset current to the second preset current.
Optionally, in some embodiments of the present application, when the liquid crystal is in the transition stage, a trend of a current provided to the backlight module is in a diagonal shape.
Optionally, in some embodiments of the present application, when the liquid crystal is in the transition stage, the current variation trend provided to the backlight module is in an arc shape with sequentially increasing curve slopes.
Optionally, in some embodiments of the present application, when the liquid crystal is in the transition stage, the current variation trend provided to the backlight module is in an arc shape with a gradually decreasing curve slope
Correspondingly, the embodiment of the present application further provides a driving device of a backlight module, where the driving device includes:
a detection unit for detecting the state of the liquid crystal;
the output unit is used for outputting a first preset current to the backlight module when the liquid crystal is in a stable state so as to enable the backlight module to be in a normal lighting state; and the backlight module is also used for outputting a second preset current to the backlight module when the liquid crystal is in a transition state so as to enable the backlight module to be in a micro-lighting state.
The embodiment of the application adopts a driving method and a driving device of a backlight module, when liquid crystal is in a stable state, a first preset current is output to the backlight module to enable the backlight module to be in a normal lighting state, and when the liquid crystal is in a transition state, a second preset current is output to the backlight module to enable the backlight module to be in a micro lighting state. When the liquid crystal is in a transition state, although the backlight module is in a micro-lighting state and cannot enable the liquid crystal display panel to display pictures, the conductivity of the thin film transistors in all regions can be changed according to the fact that part of light irradiates the thin film transistors, and the characteristic difference among the thin film transistors is reduced, so that the problem of water ripples of the liquid crystal display panel under the MPRT function is solved, and the display effect of the liquid crystal display panel is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, 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 schematic flow chart of a driving method of a backlight module according to an embodiment of the present disclosure.
Fig. 2 is a first schematic view of a current flowing through a backlight module according to an embodiment of the present disclosure.
Fig. 3 is a second schematic view of a current flowing through a backlight module according to an embodiment of the disclosure.
Fig. 4 is a third schematic view of a current flowing through a backlight module according to an embodiment of the present disclosure.
Fig. 5 is a fourth schematic view illustrating a current flowing through a backlight module according to an embodiment of the disclosure.
Fig. 6 is a fifth schematic view illustrating a current flowing through a backlight module according to an embodiment of the disclosure.
Fig. 7 is a sixth schematic view of a current flowing through a backlight module according to an embodiment of the disclosure.
Fig. 8 is a seventh schematic view illustrating a current flowing through a backlight module according to an embodiment of the disclosure.
Fig. 9 is a schematic structural diagram of a driving device of a backlight module according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described 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 embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "length," "width," "thickness," "upper," "lower," and the like, as used herein, refer to an orientation or positional relationship as shown in the drawings, which is used for convenience in describing the present application and to simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be taken as limiting the present application. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present application, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second", etc. may explicitly or implicitly include one or more of the described features and are therefore not to be construed as limiting the application.
The embodiment of the application provides a driving method and a driving device of a backlight module. The following are detailed below. It should be noted that the following description of the embodiments is not intended to limit the preferred order of the embodiments.
Referring to fig. 1, fig. 1 is a schematic flow chart illustrating a driving method of a backlight module according to an embodiment of the present disclosure. As shown in fig. 1, a driving method of a backlight module provided in an embodiment of the present application includes: step 101, detecting the state of the liquid crystal.
It should be noted that, when the liquid crystal is in a stable state, the direction of the long axis of the liquid crystal is not changed and is parallel to the vertical direction, that is, the included angle between the long axis of the liquid crystal and the vertical direction is stable to be zero. When the liquid crystal is in a rotating state, the direction of the long axis of the liquid crystal is always changed and is not parallel to the vertical direction, namely, the included angle between the long axis of the liquid crystal and the vertical direction is always changed and is not zero. When the backlight module is in a normal lighting state, the backlight module can provide light required by normal display for the liquid crystal display panel. When the backlight module is in a micro-lighting state, the backlight module emits very weak light, and the light emitted by the backlight module is not enough to support the normal display of the liquid crystal display panel.
It should be noted that, when the liquid crystal is in a stable state, the liquid crystal display panel needs to display normally, and at this time, the backlight module needs to provide the backlight required by the display of the liquid crystal display panel, so that the backlight module needs to be in a normal lighting state at this time; when the liquid crystal is in a transition state, the liquid crystal display panel does not need to display, so that the backlight module is in a micro-lighting state and a closing state.
In the prior art, when the problem of trailing of a dynamic picture is solved through the MPRT function, the backlight module is in a normal lighting state when the liquid crystal is in a stable state; when the liquid crystal is in a transition state, the backlight module is in a closed state; thereby causing the thin film transistors of the local area of the liquid crystal display panel not to be irradiated with the backlight. When the liquid crystal display panel is formed by adopting the four-photomask process, the lack of one photomask can cause the change of the conductivity of the thin film transistor device after being irradiated by light, so that the difference between the conductivity of the thin film transistor which is not irradiated by the backlight and the conductivity of the thin film transistor which is irradiated by the backlight is increased, and the problem of water ripple is generated.
It should be noted that, in the embodiments provided in the present application, when the liquid crystal is in the transition state, the backlight module is in the micro-lighting state; when the liquid crystal is in a stable state, the backlight module is in a normal lighting state. First, no matter the liquid crystal is in a transition state or a steady state, the backlight module is in a lighting state, so that the thin film transistor in any area of the liquid crystal display panel can be irradiated by backlight, when the liquid crystal display panel is formed by adopting a four-photomask process, the thin film transistor in any area can be irradiated by light, the conductivity of the thin film transistor in any area can be changed, the phenomenon that the conductivity difference of the thin film transistors in different areas is large can not occur, the water ripple problem can be solved, and the display effect of the liquid crystal display panel is improved. Secondly, when the liquid crystal is in the transition state, the backlight module is in the micro-lighting state, at this moment, because the penetration rate of the liquid crystal display panel is lower, even if the backlight module is in the lighting state, but because the luminance of the light emitted by the backlight module is lower, the liquid crystal display panel can not normally display, thereby the problem of tailing can be solved by adopting the MPRT function, and the display effect of the liquid crystal display panel is improved.
Referring to fig. 2, fig. 2 is a schematic view illustrating a first current flowing through a backlight module according to an embodiment of the disclosure. As shown in fig. 2, the liquid crystal includes two phases of a steady state and a transition state within one frame time. When the liquid crystal is in a stable state, the current received by the backlight module is a first preset current, and when the liquid crystal is in a transition state, the current received by the backlight module is a second preset current.
The first preset current is larger than the second preset current.
It should be noted that the brightness of the light emitted by the backlight module is related to the current received by the backlight module, and the greater the current received by the backlight module, the stronger the brightness of the light emitted by the backlight module. Therefore, in order to make the backlight module in a micro-lighting state when the liquid crystal is in a transition state, the second preset current provided for the backlight module is far smaller than the first preset current.
Wherein the first preset current is in a range of 20-30 milliamperes. Specifically, the first preset current is 20 milliamps, 21 milliamps, 22 milliamps, 23.5 milliamps, 25 milliamps, 27 milliamps, or 30 milliamps. The specific value of the first preset current is determined by the specific requirement of the liquid crystal display panel for normal display.
Wherein the second preset current is in a range of 1.5 milliampere to 2.5 milliampere. Specifically, the second preset current is 1.5 milliamp, 1.6 milliamp, 1.7 milliamp, 1.8 milliamp, 2.0 milliamp, 2.2 milliamp, or 2.5 milliamp. The specific value of the second preset current is determined according to the specific penetration rate of the liquid crystal display panel.
Wherein, in one frame time, the time for the liquid crystal to be in the transition state is 1 millisecond to 4 milliseconds. Specifically, the time for which the liquid crystal is in the transition state is 1 msec, 1.5 msec, 2 msec, 3 msec, or 4 msec. The specific time that the liquid crystal is in the transition state is determined by the material of the liquid crystal.
In addition, the time during which the liquid crystal is in a steady state is related to the frame rate of the liquid crystal display panel. Specifically, the time when the liquid crystal is in the transition state subtracted from the one-frame time is the time when the liquid crystal is in the steady state. Wherein, when the refresh rate of the liquid crystal display panel is 60 hz, the time of one frame is about 16.6 ms, and the time when the liquid crystal is in a steady state is 12.6 ms-15.6 ms.
Referring to fig. 3, fig. 3 is a schematic view illustrating a second current flowing through a backlight module according to an embodiment of the disclosure. As shown in fig. 3, during one frame time, the liquid crystal includes a steady state, a transition state, and a transition phase between the steady state and the transition state. When the liquid crystal is in the transition stage, the current received by the backlight module is gradually increased from the second preset current to the first preset current, and the change trend of the current received by the backlight module is in a diagonal shape.
It should be noted that, in the transition stage, the current received by the backlight module is gradually increased from the second preset current to the first preset current, so that the influence on the light emission of the backlight module due to the sudden change of the current received by the backlight module can be avoided.
When the liquid crystal is in a transition stage, the included angle between the long axis direction of the liquid crystal and the vertical direction is less than or equal to 5 degrees. When the liquid crystal is in a stable state, the included angle between the long axis direction of the liquid crystal and the vertical direction is 0. When the liquid crystal is in a rotating state, the included angle between the long axis direction of the liquid crystal and the vertical direction is more than 5 degrees.
Referring to fig. 4, fig. 4 is a schematic view illustrating a third current flowing through the backlight module according to the embodiment of the present disclosure. The difference between the current flowing through the backlight module shown in fig. 4 and the current flowing through the backlight module shown in fig. 3 is: when the liquid crystal is in the transition stage, the current received by the backlight module is gradually increased from the second preset current to the first preset current, and the change trend of the current received by the backlight module is in an arc shape with gradually increased curve slope.
Note that, the problem of the tailing of the dynamic picture is solved by the MPRT function. Therefore, when the liquid crystal does not reach the stable state, it is necessary to prevent the light emitted from the backlight module from enabling the liquid crystal display panel to normally display the image. Therefore, the change trend of the current received by the backlight module is in an arc shape with gradually increased curve slope, the time that the backlight module receives high current when the liquid crystal does not reach the stable state can be shortened as much as possible, and thus the situation that the backlight module receives high current and enables the liquid crystal display panel to normally display pictures when the liquid crystal does not reach the stable state can be avoided as much as possible, so that the trailing problem of dynamic pictures can be solved through the MPRT function conveniently, and the display effect of the liquid crystal display panel is improved.
Referring to fig. 5, fig. 5 is a fourth schematic current diagram flowing through the backlight module according to the embodiment of the disclosure. The difference between the current flowing through the backlight module shown in fig. 5 and the current flowing through the backlight module shown in fig. 3 is: when the liquid crystal is in the transition stage, the current received by the backlight module is gradually increased from the second preset current to the first preset current, and the change trend of the current received by the backlight module is in an arc shape with gradually reduced curve slope.
It should be noted that, when the change trend of the current received by the backlight module is an arc shape with a gradually decreasing slope, the backlight module can receive a high current which is enough to enable the liquid crystal display panel to normally display earlier, so that the liquid crystal display panel can normally display earlier, the display time of the liquid crystal display panel is increased, and the display effect of the liquid crystal display panel is further improved.
Referring to fig. 6, fig. 6 is a schematic view illustrating a fifth current flowing through the backlight module according to the embodiment of the present disclosure. As shown in fig. 6, during one frame time, the liquid crystal includes a steady state, a transition phase between the steady state and the transition state, and a transition phase between the steady state and the transition state. When the liquid crystal is in the transition stage, the current received by the backlight module is gradually increased from the second preset current to the first preset current, and the change trend of the current received by the backlight module is in a diagonal shape. When the liquid crystal is in the connection stage, the current received by the backlight module is gradually reduced from the first preset current to the second preset current, and the change trend of the current received by the backlight module is in a diagonal shape.
It should be noted that, in the transition stage, the current received by the backlight module is gradually increased from the second preset current to the first preset current, so that the influence on the light emission of the backlight module due to the sudden change of the current received by the backlight module can be avoided. By gradually reducing the current received by the backlight module from the first preset current to the second preset current in the connection stage, the reduction of the service life of the backlight module due to the sudden change of the current received by the backlight module can be avoided.
When the liquid crystal is in the transition stage and the connection stage, the included angle between the long axis direction of the liquid crystal and the vertical direction is less than or equal to 5 degrees. When the liquid crystal is in a stable state, the included angle between the long axis direction of the liquid crystal and the vertical direction is 0. When the liquid crystal is in a rotating state, the included angle between the long axis direction of the liquid crystal and the vertical direction is more than 5 degrees.
Referring to fig. 7, fig. 7 is a schematic view illustrating a sixth current flowing through a backlight module according to an embodiment of the disclosure. The difference between the current flowing through the backlight module shown in fig. 7 and the current flowing through the backlight module shown in fig. 6 is that: when the liquid crystal is in the transition stage, the current received by the backlight module is gradually increased from the second preset current to the first preset current, and the change trend of the current received by the backlight module is in an arc shape with gradually increased curve slope. When the liquid crystal is in the connection stage, the current received by the backlight module is gradually reduced from the first preset current to the second preset current, and the change trend of the current received by the backlight module is in an arc shape with gradually reduced curve slope.
Note that, the problem of the tailing of the dynamic picture is solved by the MPRT function. Therefore, when the liquid crystal does not reach the stable state, it is necessary to prevent the light emitted from the backlight module from enabling the liquid crystal display panel to normally display the image. Therefore, the change trend of the current received by the backlight module is in an arc shape with gradually increased curve slope in the transition stage, and the change trend of the current received by the backlight module is in an arc shape with gradually decreased curve slope in the connection stage, so that the time of the backlight module receiving high current when the liquid crystal is not in a stable state can be shortened as much as possible, and thus the situation that the liquid crystal does not reach the stable state and the backlight module receives high current to enable the liquid crystal display panel to normally display pictures can be avoided as much as possible, thereby being convenient for solving the trailing problem of dynamic pictures through the MPRT function, and further improving the display effect of the liquid crystal display panel.
Referring to fig. 8, fig. 8 is a schematic view illustrating a seventh current flowing through the backlight module according to the embodiment of the disclosure. The difference between the current flowing through the backlight module shown in fig. 8 and the current flowing through the backlight module shown in fig. 6 is: when the liquid crystal is in the transition stage, the current received by the backlight module is gradually increased from the second preset current to the first preset current, and the change trend of the current received by the backlight module is in an arc shape with gradually reduced curve slope. When the liquid crystal is in the connection stage, the current received by the backlight module is gradually reduced from the first preset current to the second preset current, and the change trend of the current received by the backlight module is in an arc shape with gradually increasing curve slope.
It should be noted that, when the change trend of the current received by the backlight module is in the arc shape with the gradually decreasing slope of the curve in the transition stage, the backlight module can receive the high current which is enough to enable the liquid crystal display panel to normally display earlier, so that the liquid crystal display panel can normally display earlier, the display time of the liquid crystal display panel is increased, and the display effect of the liquid crystal display panel is improved. In addition, when the change trend of the current received by the backlight module is in an arc shape with gradually increased curve slope in the connection stage, the backlight module can receive low current which can not enable the liquid crystal display panel to normally display later, so that the normal display time of the liquid crystal display panel can be prolonged, the display time of the liquid crystal display panel is prolonged, and the display effect of the liquid crystal display panel is improved.
In the driving method of the backlight module provided in the embodiment of the present application, when the liquid crystal is in a stable state, the first preset current is output to the backlight module to make the backlight module in a normal lighting state, and when the liquid crystal is in a transition state, the second preset current is output to the backlight module to make the backlight module in a micro lighting state. When the liquid crystal is in a transition state, although the backlight module is in a micro-lighting state and cannot enable the liquid crystal display panel to display pictures, the conductivity of the thin film transistors in all regions can be changed according to the fact that part of light irradiates the thin film transistors, and the characteristic difference among the thin film transistors is reduced, so that the problem of water ripples of the liquid crystal display panel under the MPRT function is solved, and the display effect of the liquid crystal display panel is improved.
Correspondingly, the embodiment of the application also provides a driving device of the backlight module. Referring to fig. 9, fig. 9 is a schematic structural diagram of a driving device of a backlight module according to an embodiment of the present disclosure, and as shown in fig. 9, the driving device 20 of the backlight module according to the embodiment of the present disclosure includes a detecting unit 201 and an output unit 202. The detection unit 201 is used for detecting the state of the liquid crystal. The output unit 202 is configured to output a first preset current to the backlight module when the liquid crystal is in a steady state, so that the backlight module is in a normal lighting state. The output unit 202 is further configured to output a second preset current to the backlight module when the liquid crystal is in a transition state, so that the backlight module is in a micro-lighting state.
In addition, the above embodiments have described the driving method of the backlight module in detail, and therefore, the driving method of the backlight module in the embodiments of the present application is not described in detail.
In the driving apparatus for a backlight module provided in the embodiment of the present application, when the liquid crystal is in a stable state, the first preset current is output to the backlight module to make the backlight module in a normal lighting state, and when the liquid crystal is in a transition state, the second preset current is output to the backlight module to make the backlight module in a micro lighting state. When the liquid crystal is in a transition state, although the backlight module is in a micro-lighting state and cannot enable the liquid crystal display panel to display pictures, the conductivity of the thin film transistors in all regions can be changed according to the fact that part of light irradiates the thin film transistors, and the characteristic difference among the thin film transistors is reduced, so that the problem of water ripples of the liquid crystal display panel under the MPRT function is solved, and the display effect of the liquid crystal display panel is improved.
The foregoing describes in detail a driving method and a driving apparatus for a backlight module provided in an embodiment of the present application, and a specific example is applied to explain the principle and the implementation of the present application, and the description of the foregoing embodiments is only used to help understand the method and the core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A driving method of a backlight module is characterized by comprising the following steps:
detecting the state of the liquid crystal;
when the liquid crystal is in a stable state, outputting a first preset current to the backlight module so as to enable the backlight module to be in a normal lighting state;
when the liquid crystal is in a transition state, a second preset current is output to the backlight module, so that the backlight module is in a micro-lighting state.
2. The method as claimed in claim 1, wherein the first predetermined current is greater than the second predetermined current.
3. The method of claim 2, wherein the second predetermined current is in a range of 1.5 ma to 2.5 ma.
4. The method of claim 2, wherein the first predetermined current is in a range of 20 ma to 30 ma.
5. The method according to claim 1, wherein the liquid crystal further comprises a transition phase between a steady state and a transition state, and the current output to the backlight module gradually increases from the second predetermined current to the first predetermined current when the liquid crystal is in the transition phase.
6. The method as claimed in claim 5, wherein a current variation trend provided to the backlight module is in a ramp shape when the liquid crystal is in a transition stage.
7. The method according to claim 5, wherein when the liquid crystal is in a transition phase, the current provided to the backlight module has an arc shape with a gradually increasing slope.
8. The method according to claim 5, wherein when the liquid crystal is in a transition phase, the current provided to the backlight module has an arc shape with a gradually decreasing slope.
9. The method according to claim 1, wherein the liquid crystal is in transition state for 1 ms to 4 ms in one frame time.
10. A driving device of a backlight module is characterized in that the driving device comprises:
a detection unit for detecting the state of the liquid crystal;
the output unit is used for outputting a first preset current to the backlight module when the liquid crystal is in a stable state so as to enable the backlight module to be in a normal lighting state; and the backlight module is also used for outputting a second preset current to the backlight module when the liquid crystal is in a transition state so as to enable the backlight module to be in a micro-lighting state.
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Citations (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002287132A (en) * | 2001-03-28 | 2002-10-03 | Seiko Epson Corp | Liquid crystal display device and electronic apparatus |
| CN1609942A (en) * | 2003-10-20 | 2005-04-27 | 富士通显示技术株式会社 | Liquid crystal display device |
| CN2765218Y (en) * | 2004-12-29 | 2006-03-15 | 凌巨科技股份有限公司 | LCD structure |
| CN1781034A (en) * | 2003-04-28 | 2006-05-31 | 多喜兰株式会社 | Electromagnetic-shielding light diffusion sheet |
| TW200720780A (en) * | 2005-11-25 | 2007-06-01 | Ind Tech Res Inst | Backlight module, liquid crystal display and driving method for liquid crystal display |
| KR20070080782A (en) * | 2006-02-08 | 2007-08-13 | 엘지전자 주식회사 | Thermal spreading layer, backlight unit and display apparatus including the same |
| US20080143754A1 (en) * | 2006-12-19 | 2008-06-19 | Lg. Philips Lcd Co. Ltd. | Liquid crystal display and driving method thereof |
| CN101520995A (en) * | 2009-04-02 | 2009-09-02 | 华映光电股份有限公司 | Drive method of LCD backlight modules |
| US20090219464A1 (en) * | 2002-08-28 | 2009-09-03 | Christian Schanz | Control system for light tubes |
| CN101533617A (en) * | 2008-03-14 | 2009-09-16 | 北京京东方光电科技有限公司 | Drive device and drive method for liquid crystal display |
| CN102044227A (en) * | 2009-10-23 | 2011-05-04 | 乐金显示有限公司 | Liquid crystal display and driving method thereof |
| US20110134151A1 (en) * | 2009-12-07 | 2011-06-09 | Kyung-Joon Kwon | Method for dividing display area for local dimming, liquid crystal display device using the same, and method for driving the liquid crystal display device |
| CN102169259A (en) * | 2010-12-28 | 2011-08-31 | 昆山龙腾光电有限公司 | Thin film transistor array substrate and liquid crystal display device |
| KR20120067088A (en) * | 2010-12-15 | 2012-06-25 | 엘지디스플레이 주식회사 | Liquid crystal display device |
| EP2482346A1 (en) * | 2011-01-28 | 2012-08-01 | Nichia Corporation | Light emitting device |
| CN103210494A (en) * | 2010-11-10 | 2013-07-17 | 夏普株式会社 | Substrate for display device, method for producing same, and display device |
| US20140292634A1 (en) * | 2013-03-26 | 2014-10-02 | Funai Electric Co., Ltd. | Backlight drive circuit |
| CN104576527A (en) * | 2014-12-31 | 2015-04-29 | 深圳市华星光电技术有限公司 | Method for preparing array substrate |
| CN104680996A (en) * | 2015-03-10 | 2015-06-03 | 深圳市华星光电技术有限公司 | VCOM generation circuit and liquid crystal display |
| CN105911729A (en) * | 2016-06-21 | 2016-08-31 | 武汉华星光电技术有限公司 | Liquid crystal display device and terminal |
| CN107219683A (en) * | 2017-07-25 | 2017-09-29 | 厦门天马微电子有限公司 | Display device, backlight module and back light |
| CN107403809A (en) * | 2017-07-19 | 2017-11-28 | 武汉华星光电技术有限公司 | A kind of display panel and display device |
| US20180151121A1 (en) * | 2016-11-29 | 2018-05-31 | Lg Display Co., Ltd. | Organic light-emitting display and driving method thereof |
| CN108110060A (en) * | 2017-12-12 | 2018-06-01 | 合肥京东方显示技术有限公司 | Thin film transistor (TFT) and preparation method thereof, array substrate and display device |
| CN108873499A (en) * | 2017-05-12 | 2018-11-23 | 佳升科技有限公司 | Structure of polarized light |
| CN111505859A (en) * | 2019-01-31 | 2020-08-07 | 北京小米移动软件有限公司 | Liquid crystal display screen, display method and terminal |
| CN113299246A (en) * | 2021-05-12 | 2021-08-24 | 惠州视维新技术有限公司 | Backlight module brightness adjusting method, adjusting circuit and display device |
-
2021
- 2021-11-29 CN CN202111428508.8A patent/CN114023275B/en active Active
Patent Citations (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002287132A (en) * | 2001-03-28 | 2002-10-03 | Seiko Epson Corp | Liquid crystal display device and electronic apparatus |
| US20090219464A1 (en) * | 2002-08-28 | 2009-09-03 | Christian Schanz | Control system for light tubes |
| CN1781034A (en) * | 2003-04-28 | 2006-05-31 | 多喜兰株式会社 | Electromagnetic-shielding light diffusion sheet |
| CN1609942A (en) * | 2003-10-20 | 2005-04-27 | 富士通显示技术株式会社 | Liquid crystal display device |
| CN2765218Y (en) * | 2004-12-29 | 2006-03-15 | 凌巨科技股份有限公司 | LCD structure |
| TW200720780A (en) * | 2005-11-25 | 2007-06-01 | Ind Tech Res Inst | Backlight module, liquid crystal display and driving method for liquid crystal display |
| KR20070080782A (en) * | 2006-02-08 | 2007-08-13 | 엘지전자 주식회사 | Thermal spreading layer, backlight unit and display apparatus including the same |
| US20080143754A1 (en) * | 2006-12-19 | 2008-06-19 | Lg. Philips Lcd Co. Ltd. | Liquid crystal display and driving method thereof |
| CN101533617A (en) * | 2008-03-14 | 2009-09-16 | 北京京东方光电科技有限公司 | Drive device and drive method for liquid crystal display |
| CN101520995A (en) * | 2009-04-02 | 2009-09-02 | 华映光电股份有限公司 | Drive method of LCD backlight modules |
| CN102044227A (en) * | 2009-10-23 | 2011-05-04 | 乐金显示有限公司 | Liquid crystal display and driving method thereof |
| US20110134151A1 (en) * | 2009-12-07 | 2011-06-09 | Kyung-Joon Kwon | Method for dividing display area for local dimming, liquid crystal display device using the same, and method for driving the liquid crystal display device |
| CN103210494A (en) * | 2010-11-10 | 2013-07-17 | 夏普株式会社 | Substrate for display device, method for producing same, and display device |
| KR20120067088A (en) * | 2010-12-15 | 2012-06-25 | 엘지디스플레이 주식회사 | Liquid crystal display device |
| CN102169259A (en) * | 2010-12-28 | 2011-08-31 | 昆山龙腾光电有限公司 | Thin film transistor array substrate and liquid crystal display device |
| EP2482346A1 (en) * | 2011-01-28 | 2012-08-01 | Nichia Corporation | Light emitting device |
| US20140292634A1 (en) * | 2013-03-26 | 2014-10-02 | Funai Electric Co., Ltd. | Backlight drive circuit |
| CN104576527A (en) * | 2014-12-31 | 2015-04-29 | 深圳市华星光电技术有限公司 | Method for preparing array substrate |
| CN104680996A (en) * | 2015-03-10 | 2015-06-03 | 深圳市华星光电技术有限公司 | VCOM generation circuit and liquid crystal display |
| CN105911729A (en) * | 2016-06-21 | 2016-08-31 | 武汉华星光电技术有限公司 | Liquid crystal display device and terminal |
| US20180151121A1 (en) * | 2016-11-29 | 2018-05-31 | Lg Display Co., Ltd. | Organic light-emitting display and driving method thereof |
| CN108873499A (en) * | 2017-05-12 | 2018-11-23 | 佳升科技有限公司 | Structure of polarized light |
| CN107403809A (en) * | 2017-07-19 | 2017-11-28 | 武汉华星光电技术有限公司 | A kind of display panel and display device |
| CN107219683A (en) * | 2017-07-25 | 2017-09-29 | 厦门天马微电子有限公司 | Display device, backlight module and back light |
| CN108110060A (en) * | 2017-12-12 | 2018-06-01 | 合肥京东方显示技术有限公司 | Thin film transistor (TFT) and preparation method thereof, array substrate and display device |
| CN111505859A (en) * | 2019-01-31 | 2020-08-07 | 北京小米移动软件有限公司 | Liquid crystal display screen, display method and terminal |
| CN113299246A (en) * | 2021-05-12 | 2021-08-24 | 惠州视维新技术有限公司 | Backlight module brightness adjusting method, adjusting circuit and display device |
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