CN112071276A - Backlight source, backlight module and display device - Google Patents
Backlight source, backlight module and display device Download PDFInfo
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- CN112071276A CN112071276A CN202011105150.0A CN202011105150A CN112071276A CN 112071276 A CN112071276 A CN 112071276A CN 202011105150 A CN202011105150 A CN 202011105150A CN 112071276 A CN112071276 A CN 112071276A
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- backlight
- emitting elements
- light
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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
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136286—Wiring, e.g. gate line, drain line
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Mathematical Physics (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The application provides a backlight, backlight unit, display device, this backlight includes: a substrate; the light-emitting elements are arranged on the substrate in a lattice of M rows and N columns, and M and N are positive integers greater than or equal to 2; the data line is arranged between two adjacent light-emitting elements along the longitudinal direction; a scanning line disposed between two adjacent light emitting elements in a transverse direction; wherein, a row of luminous elements is correspondingly connected with n data lines, m rows of luminous elements are correspondingly connected with a scanning line, and n and m are positive integers which are more than or equal to 2. According to the backlight source substrate, the number of the data line channels on the backlight source substrate is increased, and the number of the scanning line channels is reduced, so that the scanning time of each frame of backlight of the backlight source is shortened, and the refresh rate of the backlight source is improved.
Description
Technical Field
The application relates to the technical field of display, in particular to a backlight source, a backlight module and a display device.
Background
An Organic Light Emitting Diode (OLED) Display device has the advantages of self-Light emission, no need of a backlight source, thin thickness, narrow frame, and the like. In the face of the competition of the OLED, the traditional TFT liquid crystal display screen can effectively make up the defects of the traditional TFT liquid crystal display screen by adopting a Mini-LED backlight display technology. When the Mini-LED is used for backlight, the backlight refresh rate is higher, and the backlight flicker phenomenon which possibly occurs is obviously improved. Meanwhile, to achieve a higher number of backlight gray scales, 8 bits or more are generally required, and a higher refresh rate, which may be as high as several tens of kilohertz, is also required.
However, in a situation where the number of LEDs in the backlight is large, i.e., the number of rows and columns of the LED matrix is large, it takes a longer time for the corresponding backlight to light up for one frame. Generally, the improved methods, such as increasing the driving voltage to accelerate the charging speed, improving the TFT driving performance, optimizing the control timing, etc., are not obvious to reduce the lighting time of each frame of the backlight source and increase the backlight refresh rate.
Therefore, the prior art has defects which need to be solved urgently.
Disclosure of Invention
The application provides a backlight source, a backlight module and a display device, which can solve the problems that each frame of a traditional Mini-LED backlight source is long in lighting time and the backlight refresh rate is low.
In order to solve the above problems, the technical solution provided by the present application is as follows:
the present application provides a backlight, comprising:
a substrate;
the light-emitting elements are arranged on the substrate in a lattice of M rows and N columns, and M and N are positive integers greater than or equal to 2;
the data line is arranged between two adjacent light-emitting elements along the longitudinal direction;
the scanning lines are arranged between two adjacent light-emitting elements along the transverse direction;
the light-emitting elements in one column are correspondingly connected with n data lines, the light-emitting elements in m rows are correspondingly connected with one scanning line, and n and m are positive integers greater than or equal to 2.
In the backlight source of the application, the number of the scanning lines is M/M, and the number of the data lines is N × N.
In the backlight source of the present application, a driving circuit is further disposed on the substrate, the first light emitting element is respectively connected to the scan line and the data line through the corresponding driving circuit, and the driving circuit includes a first thin film transistor, a second thin film transistor, and a storage capacitor.
In the backlight source of the present application, a gate of the first thin film transistor is electrically connected to the scan line, a source of the first thin film transistor is electrically connected to the data line, and a drain of the first thin film transistor is electrically connected to a gate of the second thin film transistor and a first electrode of the storage capacitor, respectively;
the source electrode of the second thin film transistor and the second electrode of the storage capacitor are both connected to a first power supply signal, the drain electrode of the second thin film transistor is electrically connected to the cathode of the light-emitting element, and the anode of the light-emitting element is connected to a second power supply signal.
In the backlight of the present application, a charging time required for the storage capacitor corresponding to each row of the light emitting elements is T, and a time required for the backlight to drive one frame of backlight is (M/M) × T.
In the backlight of the present application, the value of n is equal to the value of m.
In the backlight source of the present application, the light emitting elements connected to the same scanning line are correspondingly connected to n data lines in the row direction, and one of the light emitting elements is correspondingly connected to one of the data lines.
In the backlight source of the present application, at least two driving chips are bound to a binding region of the substrate, and the data lines are equally connected to the at least two driving chips.
The application also provides a backlight module, which comprises the backlight source, the light guide plate, the diffusion plate and the optical film.
The application also provides a display device, which comprises the backlight source and the display panel.
The beneficial effect of this application does: the application provides a backlight, backlight unit, display device through the quantity through increasing the data line passageway on the backlight base plate to and reduce scanning line passageway quantity, make a line scanning signal open multirow light emitting component simultaneously, all data lines charge for this multirow light emitting component simultaneously, thereby shorten the scanning time that backlight every frame is shaded, and then improve the refresh rate of backlight.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a backlight provided herein;
FIG. 2 is a circuit diagram of a single light emitting device;
fig. 3 is a schematic view illustrating a driving method of a backlight according to an embodiment of the present disclosure;
fig. 4 is a schematic view of a driving method of a backlight source according to a second 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. 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 "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," and the like are used in the orientation or positional relationship indicated in the drawings, which are based on the orientation or positional relationship shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered 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.
The present application may repeat reference numerals and/or letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed.
Due to the current pursuit of high resolution and high refresh rate of the panel, in the structure of the liquid crystal panel carrying the traditional backlight, the number of the light emitting elements arranged in a dot matrix on the substrate of the backlight is also increased sharply, generally, one row of the light emitting elements is connected with one scanning line correspondingly, and one column of the light emitting elements is connected with one data line correspondingly. The scanning signal is driven line by line, and when the number of rows of the light-emitting elements is large, the time required for lighting one row of the light-emitting elements is the charging time of the storage capacitor, so that the time required for lighting the whole backlight source is long, and the refresh rate of the backlight is low.
Accordingly, an object of the present application is to provide a backlight source, a backlight module and a display device, which are capable of solving the above problems.
Referring to fig. 1 to 4, the backlight provided by the present application includes: a substrate 10; the light-emitting elements 20 are arranged on the substrate 10 in a lattice of M rows and N columns, wherein M and N are positive integers greater than or equal to 2. A data line D disposed between two adjacent light emitting elements 20 in the longitudinal direction; and a scanning line G disposed between two adjacent light emitting elements 20 in the transverse direction. The light emitting elements 20 in one column are correspondingly connected with n data lines D, the light emitting elements 20 in m rows are correspondingly connected with one scanning line G, and n and m are positive integers greater than or equal to 2.
In the present application, the total number of the scan lines G is M/M, and the total number of the data lines D is N × N.
The substrate 10 is further provided with a driving circuit, and the light emitting elements 20 are respectively connected to the scanning lines G and the data lines D through the corresponding driving circuits. Specifically, as shown in fig. 2, a driving circuit diagram of a single light emitting element is shown. The driving circuit includes a first thin film transistor T1, a second thin film transistor T2, and a storage capacitor C. The gate of the first thin film transistor T1 is electrically connected to the scan line G, the source of the first thin film transistor T1 is electrically connected to the data line D, and the drain of the first thin film transistor T1 is electrically connected to the gate of the second thin film transistor T2 and the first electrode of the storage capacitor C, respectively. The source of the second thin film transistor T2 and the second electrode of the storage capacitor C are both connected to a first power signal VSS, the drain of the second thin film transistor T2 is electrically connected to the cathode of the light emitting device 20, and the anode of the light emitting device 20 is connected to a second power signal VDD.
In one embodiment, n has a value equal to m. That is, the light emitting elements 20 connected to the same scanning line G are correspondingly connected to n data lines D in the column direction, wherein one light emitting element 20 is correspondingly connected to one data line D.
According to the backlight source substrate, the number of data line channels on the backlight source substrate is increased, the number of scanning line channels is reduced, so that a row of scanning signals simultaneously turn on a plurality of rows of light-emitting elements, and all data lines simultaneously charge the plurality of rows of light-emitting elements. If the charging time required for the storage capacitor corresponding to each row of the light emitting elements is T, since a row of scanning signals simultaneously turn on a plurality of rows of the light emitting elements, that is, the storage capacitors corresponding to the plurality of rows of the light emitting elements can be simultaneously charged, the time required for the backlight source to drive one frame of backlight is (M/M) × T. Therefore, the method and the device greatly shorten the scanning time of each frame of backlight of the backlight source, and further improve the refresh rate of the backlight source.
The backlight source, the backlight module and the display device of the present application will be described in detail with reference to the embodiments.
Example one
Fig. 3 is a schematic view of a driving method of a backlight according to an embodiment of the present application. For convenience of description, in this embodiment, the values of N and M are both 2, that is, in this embodiment, the total number of the scan lines G is M/2 (G1, G2... G (M/2)), and the total number of the data lines D is 2N (D1, D2... D (2N)). In fig. 3, one circle represents one light emitting element 20, one column of the light emitting elements 20 is correspondingly connected to two data lines (e.g., D1 and D2), and two rows of the light emitting elements 20 are correspondingly connected to one scan line (e.g., G1).
In this embodiment, after the number of the data lines is doubled, each scanning signal simultaneously turns on two rows of the light emitting elements 20, the entire backlight source has only M/2 scanning lines, and if the time required for each scanning line to light the light emitting elements in the corresponding row is the storage capacitor charging time T, the time taken to light the light emitting elements in the entire row is (M/2) × T, and the backlight refresh rate can be doubled.
Since the number of the data lines is increased, in one embodiment, the bonding region of the substrate is bonded with at least two driving chips, and the data lines are equally connected to the at least two driving chips, so as to avoid capacitance/resistance differences between different data lines.
Example two
Fig. 4 is a schematic view of a driving method of a backlight source according to a second embodiment of the present application. The present embodiment is different from the first embodiment in that: the total number of the scan lines G of the present embodiment is M/3 (G1, G2... G (M/3)), and the total number of the data lines D is 3N (D1, D2... D (3N)). Three data lines (e.g., D1, D2, D3) are connected to one row of the light emitting elements 20, and one scan line (e.g., G1) is connected to three rows of the light emitting elements 20.
In this embodiment, the number of the data lines is increased to 3 times of the original number, each scanning signal simultaneously turns on 3 rows of the light emitting elements 20, the entire backlight source has only M/3 scanning lines, and if the time required for each scanning line to light the light emitting elements in the corresponding row is the storage capacitor charging time T, the time taken to light the light emitting elements in the entire row is (M/3) × T, and the refresh rate of the backlight can be increased to three times of the original rate.
Of course, in other embodiments, the number of the data lines may be increased to 4 times or more, which may be adjusted according to actual situations.
The application also provides a backlight module, which comprises the backlight source, the light guide plate, the diffusion plate and the optical film.
The application also provides a display device, which comprises the backlight source and the display panel.
The application provides a backlight, backlight unit, display device, through the quantity through increasing the data line passageway on the backlight base plate, and reduce scanning line passageway quantity, make multirow light emitting component is opened simultaneously to a line scanning signal, all data lines charge for this multirow light emitting component simultaneously, thereby shorten the scanning time that backlight every frame is shaded, and then improve the refresh rate of backlight, can demonstrate more meticulous grey scale in a poor light, combine with display panel, can let the picture more exquisite, improve display effect.
In summary, although the present application has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present application, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, so that the scope of the present application shall be determined by the appended claims.
Claims (10)
1. A backlight, comprising:
a substrate;
the light-emitting elements are arranged on the substrate in a lattice of M rows and N columns, and M and N are positive integers greater than or equal to 2;
the data line is arranged between two adjacent light-emitting elements along the longitudinal direction;
the scanning lines are arranged between two adjacent light-emitting elements along the transverse direction;
the light-emitting elements in one column are correspondingly connected with n data lines, the light-emitting elements in m rows are correspondingly connected with one scanning line, and n and m are positive integers greater than or equal to 2.
2. The backlight of claim 1, wherein the number of scan lines is M/M and the number of data lines is N x N.
3. The backlight source of claim 1, wherein the substrate further comprises a driving circuit, and one of the light emitting elements is connected to the scan line and the data line through the corresponding driving circuit, and the driving circuit comprises a first thin film transistor, a second thin film transistor, and a storage capacitor.
4. The backlight according to claim 3, wherein a gate of the first thin film transistor is electrically connected to the scan line, a source of the first thin film transistor is electrically connected to the data line, and a drain of the first thin film transistor is electrically connected to a gate of the second thin film transistor and the first electrode of the storage capacitor, respectively;
the source electrode of the second thin film transistor and the second electrode of the storage capacitor are both connected to a first power supply signal, the drain electrode of the second thin film transistor is electrically connected to the cathode of the light-emitting element, and the anode of the light-emitting element is connected to a second power supply signal.
5. The backlight of claim 3, wherein the charging time required for the storage capacitor corresponding to each row of the light emitting elements is T, and the time required for the backlight to drive one frame of backlight is (M/M) x T.
6. The backlight of claim 1, wherein n has a value equal to m.
7. The backlight according to claim 6, wherein the light emitting elements connected to the same scanning line are correspondingly connected to n data lines in a column direction, and one light emitting element is correspondingly connected to one data line.
8. The backlight source of claim 1, wherein the bonding area of the substrate is bonded with at least two driving chips, and the data lines are equally connected to the at least two driving chips.
9. A backlight module comprising the backlight according to any one of claims 1 to 8, and a light guide plate, a diffusion plate and an optical film.
10. A display device comprising the backlight according to any one of claims 1 to 8 and a display panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011105150.0A CN112071276A (en) | 2020-10-15 | 2020-10-15 | Backlight source, backlight module and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011105150.0A CN112071276A (en) | 2020-10-15 | 2020-10-15 | Backlight source, backlight module and display device |
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| CN112071276A true CN112071276A (en) | 2020-12-11 |
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| CN202011105150.0A Pending CN112071276A (en) | 2020-10-15 | 2020-10-15 | Backlight source, backlight module and display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113077743A (en) * | 2021-03-17 | 2021-07-06 | Tcl华星光电技术有限公司 | Driving method and driver for improving refresh rate of display panel and display device |
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Application publication date: 20201211 |