CN112201210A - Drive circuit, backlight module and display device - Google Patents
Drive circuit, backlight module and display device Download PDFInfo
- Publication number
- CN112201210A CN112201210A CN202011181237.6A CN202011181237A CN112201210A CN 112201210 A CN112201210 A CN 112201210A CN 202011181237 A CN202011181237 A CN 202011181237A CN 112201210 A CN112201210 A CN 112201210A
- Authority
- CN
- China
- Prior art keywords
- voltage
- module
- power supply
- emitting element
- supply voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004973 liquid crystal related substance Substances 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 210000000707 wrist Anatomy 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a drive circuit, a backlight module and a display device, wherein the drive circuit comprises: one end of the voltage division element is connected with the second end of the first light-emitting element group string; the other end of the voltage division element is connected with a second power supply voltage; wherein the second supply voltage is less than the first supply voltage; the comparison module is connected with the second end of the first light-emitting element group string, a preset reference voltage is connected to the comparison module, and the comparison module is used for comparing the voltage of the voltage division element with the preset reference voltage to obtain a comparison result; and the adjusting module is respectively connected with the comparing module and the power supply module and is used for adjusting the first power supply voltage according to the comparison result so as to output a target power supply voltage to the backboard module. The driving circuit, the backlight module and the display device can avoid the deviation of power supply voltage and improve the uniformity of brightness and the display effect.
Description
Technical Field
The application relates to the technical field of display, in particular to a driving circuit, a backlight module and a display device.
Background
Liquid Crystal Display (LCD) panels are widely used in various electronic products, and the LCD panels need a backlight module to provide a backlight source.
Usually, the power supply voltage accessed by the light emitting elements in the backlight module at different temperatures will deviate, resulting in uneven display brightness, and further reducing the display effect.
Disclosure of Invention
The invention provides a driving circuit, a backlight module and a display device, which can avoid the deviation of power supply voltage and improve the uniformity of brightness and the display effect.
The present invention provides a driving circuit for supplying power to a backlight module, the driving circuit comprising:
a power supply module for providing the first supply voltage;
a first light emitting element group string including a plurality of first light emitting elements connected in series with each other; a first end of the first light-emitting element group string is connected to a first power supply voltage;
one end of the voltage division element is connected with the second end of the first light-emitting element group string; the other end of the voltage division element is connected with a second power supply voltage; wherein the second supply voltage is less than the first supply voltage;
the comparison module is connected with the second end of the first light-emitting element group string, a preset reference voltage is connected to the comparison module, and the comparison module is used for comparing the voltage of the voltage division element with the preset reference voltage to obtain a comparison result;
and the adjusting module is respectively connected with the comparing module and the power supply module and is used for adjusting the first power supply voltage according to the comparison result so as to output a target power supply voltage to the backboard module.
The invention also provides a backlight module, which comprises the driving circuit and the backlight module; the backlight module includes:
at least one backlight unit including a second light emitting element group string including a plurality of second light emitting elements connected in series with each other;
the control module is used for controlling the second light-emitting element group string to emit light;
wherein the first end of the second light emitting element group string is connected to the driving circuit, and the total number of the second light emitting elements is equal to the sum of the total number of the first light emitting elements and the number of the voltage dividing elements.
The invention also provides a display device which comprises the backlight module and the liquid crystal display panel, wherein the liquid crystal display panel is arranged on the light emergent side of the backlight module.
The driving circuit, the backlight module and the display device comprise a power supply module, wherein the power supply module is used for providing the first power supply voltage; a first light emitting element group string including a plurality of first light emitting elements connected in series with each other; a first end of the first light-emitting element group string is connected to a first power supply voltage; one end of the voltage division element is connected with the second end of the first light-emitting element group string; the other end of the voltage division element is connected with a second power supply voltage; wherein the second supply voltage is less than the first supply voltage; the comparison module is connected with the second end of the first light-emitting element group string, a preset reference voltage is connected to the comparison module, and the comparison module is used for comparing the voltage of the voltage division element with the preset reference voltage to obtain a comparison result; the adjusting module is respectively connected with the comparing module and the power supply module, and is used for adjusting the first power supply voltage according to the comparison result so as to output a target power supply voltage to the backboard module; the first power supply voltage is adjusted according to the comparison result of the voltage division element and the preset reference voltage, so that the influence of temperature on the power supply voltage in the backlight module can be avoided, and the uniformity and the display effect of brightness are improved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, 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 without creative efforts.
Fig. 1 is a graph showing a relationship between temperature and forward voltage of a light emitting element.
Fig. 2 is a graph of the relationship between temperature and brightness.
Fig. 3 is a schematic structural diagram of a driving circuit according to an embodiment of the present disclosure.
Fig. 4 is a schematic structural diagram of a driving circuit according to another embodiment of the present disclosure.
Fig. 5 is a schematic structural diagram of a backlight module according to an embodiment of the present application.
Fig. 6 is a schematic structural diagram of a display device according to an embodiment of the present application.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present application and not all 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 "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. 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 noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
As shown in fig. 1, the abscissa of fig. 1 represents temperature and the ordinate represents forward voltage, and it can be seen from fig. 1 that as the temperature increases, the magnitude of the forward voltage decreases. As shown in fig. 2, the abscissa of fig. 2 represents temperature and the ordinate represents luminance of the light emitting element, and it can be seen from fig. 2 that the luminance of the light emitting element fluctuates as the temperature increases.
Referring to fig. 3 and 4, fig. 3 is a schematic structural diagram of a driving circuit according to an embodiment of the present disclosure.
As shown in fig. 3, the driving circuit 10 of the present embodiment is used for supplying power to a backlight module, and the driving circuit 10 includes: the light-emitting device comprises a power module 11, a first light-emitting element group string 12, a voltage division element 13, a comparison module 14 and an adjustment module 15.
The power module 11 is configured to provide the first power voltage V0.
The first light emitting element group string 12 includes a plurality of first light emitting elements 121 connected in series with each other; a first end of the first light-emitting element group string 12 is connected to a first power voltage V0; the first light emitting element 121 includes, but is not limited to, an organic light emitting diode.
One end of the voltage dividing element 13 is connected to the second end of the first light emitting element group string 12; the other end of the voltage dividing element 13 is connected to a second power voltage V1; wherein the second supply voltage V1 is less than the first supply voltage V0; in one embodiment, the first end of the first light emitting element string 12 is an anode and the second end is a cathode. Of course, in other embodiments, the first end of the first light emitting element group string 12 is a cathode and the second end is an anode. Referring to fig. 4, in one embodiment, the voltage dividing element 13 includes at least one resistor R. Of course, the specific structure of the voltage dividing element 13 is not limited thereto.
The comparison module 14 is connected to the second end of the first light emitting element group string 12, a preset reference voltage Vf is accessed to the comparison module 14, and the comparison module 14 is configured to compare the voltage V2 of the voltage dividing element 13 with the preset reference voltage Vf to obtain a comparison result.
An adjusting module 15 is respectively connected to the comparing module 14 and the power module 11, wherein the adjusting module 15 is configured to adjust the first power voltage V0 according to the comparison result to output a target power voltage V3 to the backplane module. In an embodiment, in order to further improve the uniformity of the brightness, the adjusting module 15 is specifically configured to adjust the first power voltage V0 according to a difference between the voltage V2 of the voltage dividing element 13 and the preset reference voltage Vf.
In one embodiment, when the voltage V2 of the voltage dividing element 13 is greater than the preset reference voltage Vf, the first power voltage V0 is increased by the difference;
when the voltage V2 of the voltage dividing element 13 is less than the preset reference voltage Vf, the first power voltage V0 is decreased by the difference.
In an embodiment, as shown in fig. 4, the comparing module 14 includes a comparator C, a first input end of the comparator C is connected to the second end of the first light emitting element group string 12, a second input end of the comparator C is connected to the preset reference voltage Vf, and an output end of the comparator C is connected to the adjusting module 15.
In one embodiment, when the voltage at the output end of the comparing module 14 is at a high level, the comparison result is that the voltage V2 of the voltage dividing element 13 is greater than the preset reference voltage Vf;
when the voltage at the output end of the comparing module 14 is at a low level, the comparison result is that the voltage V2 of the voltage dividing element 13 is smaller than the preset reference voltage Vf.
In one embodiment, in order to reduce the production cost and improve the integration of the circuit, the power module 11 and the adjustment module 15 are integrated in the same chip 101, which may be a power chip.
In one embodiment, the driving circuit 10 is disposed on a circuit board (not shown) to further improve the accuracy of the target power voltage.
Because the adjusting module is added and the first power voltage is adjusted according to the comparison result of the voltage dividing element and the preset reference voltage, the influence of temperature on the power voltage in the backlight module can be avoided, and the uniformity of brightness and the display effect are improved.
As shown in fig. 5, the present invention further provides a backlight module 100, which includes any one of the driving circuits 10 and the backlight module 20; the backlight module 20 includes:
at least one backlight unit 21, said backlight unit 21 comprising a second light emitting element group string 21, said second light emitting element group string 21 comprising a plurality of second light emitting elements 211 connected in series with each other;
the control module 22 is configured to control the second light-emitting element group string 21 to emit light;
wherein a first end of the second light emitting element group string 21 is connected to the driving circuit 10. The total number of the second light emitting elements 211 is equal to the sum of the total number of the first light emitting elements 121 and the number of the voltage dividing elements 13. In one embodiment, the second end of the second light emitting element group string 21 is connected to the control module 22. In one embodiment, the first end may be an anode and the second end a cathode.
In one embodiment, in order to improve the accuracy of the target power voltage, the resistance of the voltage dividing element 13 is equal to the resistance of the first light emitting element 121.
In one embodiment, the control module 22 includes a first switch T, a control terminal of the first switch T is connected to the scan signal S1, an input terminal of the first switch T is connected to the second power voltage V1, and an output terminal of the first switch T is connected to the second terminal of the second light emitting element group string 21.
As shown in fig. 6, the present invention further provides a display device 200, which includes the backlight module 100 and a liquid crystal display panel 201, wherein the liquid crystal display panel 201 is located at a light emitting side of the backlight module 100. The display device 200 may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, an intelligent watch, a fitness wrist strap, and a personal digital assistant. Other essential components of the display device should be understood by those skilled in the art, and are not described herein nor should they be construed as limiting the present invention.
In addition, because the display device comprises the backlight module, the display device has the same effect as the backlight module, and repeated parts are not repeated.
The driving circuit, the backlight module and the display device comprise a power supply module, wherein the power supply module is used for providing the first power supply voltage; a first light emitting element group string including a plurality of first light emitting elements connected in series with each other; a first end of the first light-emitting element group string is connected to a first power supply voltage; one end of the voltage division element is connected with the second end of the first light-emitting element group string; the other end of the voltage division element is connected with a second power supply voltage; wherein the second supply voltage is less than the first supply voltage; the comparison module is connected with the second end of the first light-emitting element group string, a preset reference voltage is connected to the comparison module, and the comparison module is used for comparing the voltage of the voltage division element with the preset reference voltage to obtain a comparison result; the adjusting module is respectively connected with the comparing module and the power supply module, and is used for adjusting the first power supply voltage according to the comparison result so as to output a target power supply voltage to the backboard module; the first power supply voltage is adjusted according to the comparison result of the voltage division element and the preset reference voltage, so that the influence of temperature on the power supply voltage in the backlight module can be avoided, and the uniformity and the display effect of brightness are improved.
The driving circuit, the backlight module and the display device provided by the invention are described in detail, specific examples are applied in the description to explain the principle and the implementation of the invention, and the description of the above embodiments is only used to help understanding the invention. 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 circuit for providing power to a backlight module, the driving circuit comprising:
a power supply module for providing the first supply voltage;
a first light emitting element group string including a plurality of first light emitting elements connected in series with each other; a first end of the first light-emitting element group string is connected to a first power supply voltage;
one end of the voltage division element is connected with the second end of the first light-emitting element group string; the other end of the voltage division element is connected with a second power supply voltage; wherein the second supply voltage is less than the first supply voltage;
the comparison module is connected with the second end of the first light-emitting element group string, a preset reference voltage is connected to the comparison module, and the comparison module is used for comparing the voltage of the voltage division element with the preset reference voltage to obtain a comparison result;
and the adjusting module is respectively connected with the comparing module and the power supply module and is used for adjusting the first power supply voltage according to the comparison result so as to output a target power supply voltage to the backboard module.
2. The drive circuit according to claim 1,
the adjusting module is specifically configured to adjust the first power supply voltage according to a difference between the voltage of the voltage dividing element and the preset reference voltage.
3. The drive circuit according to claim 2,
when the voltage of the voltage division element is greater than the preset reference voltage, increasing the first power supply voltage by the difference value;
and when the voltage of the voltage division element is smaller than the preset reference voltage, reducing the first power supply voltage by the difference value.
4. The drive circuit according to claim 1,
the comparison module comprises a comparator, a first input end of the comparator is connected with a second end of the first light-emitting element group string, a second input end of the comparator is connected with the preset reference voltage, and an output end of the comparator is connected with the adjustment module.
5. The drive circuit according to claim 4,
when the voltage of the output end of the comparison module is at a high level, the comparison result is that the voltage of the voltage division element is greater than the preset reference voltage;
when the voltage of the output end of the comparison module is at a low level, the comparison result is that the voltage of the voltage division element is smaller than the preset reference voltage.
6. The drive circuit according to claim 1,
the power module and the adjusting module are integrated in the same chip.
7. The driver circuit of claim 1, wherein the driver circuit is disposed on a circuit board.
8. A backlight module, comprising the driving circuit of any one of claims 1 to 7 and a backlight module; the backlight module includes:
at least one backlight unit including a second light emitting element group string including a plurality of second light emitting elements connected in series with each other;
the control module is used for controlling the second light-emitting element group string to emit light;
wherein the first end of the second light emitting element group string is connected to the driving circuit, and the total number of the second light emitting elements is equal to the sum of the total number of the first light emitting elements and the number of the voltage dividing elements.
9. The backlight module according to claim 8,
the resistance value of the voltage dividing element is equal to the resistance value of the first light emitting element.
10. A display device comprising the backlight module according to claim 8 or 9 and a liquid crystal display panel, wherein the liquid crystal display panel is disposed on the light-emitting side of the backlight module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011181237.6A CN112201210A (en) | 2020-10-29 | 2020-10-29 | Drive circuit, backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011181237.6A CN112201210A (en) | 2020-10-29 | 2020-10-29 | Drive circuit, backlight module and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112201210A true CN112201210A (en) | 2021-01-08 |
Family
ID=74011951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011181237.6A Pending CN112201210A (en) | 2020-10-29 | 2020-10-29 | Drive circuit, backlight module and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112201210A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113421521A (en) * | 2021-06-15 | 2021-09-21 | Tcl华星光电技术有限公司 | Backlight driving circuit, driving method and backlight module |
| CN114745054A (en) * | 2022-03-23 | 2022-07-12 | 武汉光迅科技股份有限公司 | Optical module device and voltage adjusting method |
| WO2023097751A1 (en) * | 2021-12-03 | 2023-06-08 | Tcl华星光电技术有限公司 | Backlight driving circuit and display device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1949351A (en) * | 2005-10-11 | 2007-04-18 | 美国凹凸微系有限公司 | Controller circuitry for light emitting diodes LCD array |
| CN101174385A (en) * | 2006-11-02 | 2008-05-07 | 立锜科技股份有限公司 | Backlight control circuit and luminous element control method |
| CN101191956A (en) * | 2006-11-28 | 2008-06-04 | 立锜科技股份有限公司 | Backlight control circuit |
| US20080298088A1 (en) * | 2007-05-28 | 2008-12-04 | Yi-Lun Shen | Dc to dc converter with load open detection and related method thereof |
| CN201388317Y (en) * | 2009-03-23 | 2010-01-20 | 山东交通职业学院 | LCD backlight-driving power saving circuit |
| CN101764516A (en) * | 2008-09-30 | 2010-06-30 | 凹凸电子（武汉）有限公司 | Power systems, power supply methods and display systems |
| CN103218976A (en) * | 2013-03-05 | 2013-07-24 | 深圳市华星光电技术有限公司 | Light-emitting diode (LED) backlight driving circuit, LED backlight and liquid crystal display |
| CN103295537A (en) * | 2013-05-08 | 2013-09-11 | 深圳市华星光电技术有限公司 | LED backlight driving circuit, backlight module and liquid crystal display device |
| CN106507560A (en) * | 2015-09-07 | 2017-03-15 | 力林科技股份有限公司 | light-emitting diode backlight module and driving device thereof |
-
2020
- 2020-10-29 CN CN202011181237.6A patent/CN112201210A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1949351A (en) * | 2005-10-11 | 2007-04-18 | 美国凹凸微系有限公司 | Controller circuitry for light emitting diodes LCD array |
| CN101174385A (en) * | 2006-11-02 | 2008-05-07 | 立锜科技股份有限公司 | Backlight control circuit and luminous element control method |
| CN101191956A (en) * | 2006-11-28 | 2008-06-04 | 立锜科技股份有限公司 | Backlight control circuit |
| US20080298088A1 (en) * | 2007-05-28 | 2008-12-04 | Yi-Lun Shen | Dc to dc converter with load open detection and related method thereof |
| CN101764516A (en) * | 2008-09-30 | 2010-06-30 | 凹凸电子（武汉）有限公司 | Power systems, power supply methods and display systems |
| CN201388317Y (en) * | 2009-03-23 | 2010-01-20 | 山东交通职业学院 | LCD backlight-driving power saving circuit |
| CN103218976A (en) * | 2013-03-05 | 2013-07-24 | 深圳市华星光电技术有限公司 | Light-emitting diode (LED) backlight driving circuit, LED backlight and liquid crystal display |
| CN103295537A (en) * | 2013-05-08 | 2013-09-11 | 深圳市华星光电技术有限公司 | LED backlight driving circuit, backlight module and liquid crystal display device |
| CN106507560A (en) * | 2015-09-07 | 2017-03-15 | 力林科技股份有限公司 | light-emitting diode backlight module and driving device thereof |
Non-Patent Citations (1)
| Title |
|---|
| 吴洪江: "《雷达收发组件芯片技术》", 31 December 2017 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113421521A (en) * | 2021-06-15 | 2021-09-21 | Tcl华星光电技术有限公司 | Backlight driving circuit, driving method and backlight module |
| WO2023097751A1 (en) * | 2021-12-03 | 2023-06-08 | Tcl华星光电技术有限公司 | Backlight driving circuit and display device |
| CN114745054A (en) * | 2022-03-23 | 2022-07-12 | 武汉光迅科技股份有限公司 | Optical module device and voltage adjusting method |
| CN114745054B (en) * | 2022-03-23 | 2024-01-12 | 武汉光迅科技股份有限公司 | Optical module equipment and voltage adjustment method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112201210A (en) | Drive circuit, backlight module and display device | |
| CN111999936B (en) | Backlight module and display device | |
| US11411058B2 (en) | Flexible display device | |
| US9396691B2 (en) | Method for compensating resistance of signal lines of gate driving circuits and liquid crystal panel applying the same | |
| US10356874B2 (en) | Backlighting dimming circuit and liquid crystal display | |
| KR100669205B1 (en) | Driving apparatus for dual flat display | |
| KR100982060B1 (en) | Electro-optical device and electronic apparatus | |
| US6943506B2 (en) | Inverter apparatus and liquid crystal display including inverter apparatus | |
| US8624940B2 (en) | Backlight unit and display apparatus | |
| US7868972B2 (en) | Light source unit, liquid crystal display having the same, and method thereof | |
| WO2021082895A1 (en) | Backlight control circuit and control method therefor, and display terminal | |
| KR101205535B1 (en) | Apparatus for driving of light source and display device having the same and method of driving of light source | |
| CN112233625A (en) | Backlight constant-current control circuit and backlight structure | |
| JP2006278107A (en) | Surface lighting system and liquid crystal display equipped with it | |
| US10170031B2 (en) | Display apparatus | |
| US8686937B2 (en) | Backlight unit with feedback circuit and driving method using the same | |
| CN112233610A (en) | Backlight constant-current control circuit and backlight structure | |
| US20230360596A1 (en) | Drive circuit, display device, and debugging method | |
| US20180102097A1 (en) | Display device | |
| CN114397781A (en) | Backlight module, preparation method thereof and display device | |
| CN109634339B (en) | Voltage adjusting circuit and voltage adjusting method | |
| US20080284692A1 (en) | Method for controlling backlight apparatus and luminance control circuit thereof | |
| CN108320713B (en) | backlight driving circuit and driving method thereof, backlight module and display device | |
| US11955068B2 (en) | Gamma standard voltage generating circuit, gamma driving voltage generating circuit and display device | |
| CN104201167A (en) | Welding pad structure and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210108 |