CN211181603U - Light-emitting circuit, backlight module and display - Google Patents

Abstract

The present application provides a light-emitting circuit, a backlight module and a display, wherein the light-emitting circuit includes: a first branch and a second branch. The first branch includes a plurality of first light emitting elements. The second branch includes a plurality of second light emitting elements. The operating current of the first branch is smaller than the operating current of the second branch, a plurality of first light-emitting elements and a plurality of second light-emitting elements constitute a light-emitting area, a plurality of first light-emitting elements are located in the middle of the light-emitting area, and a plurality of first light-emitting elements are located in the middle of the light-emitting area. Two light-emitting elements are located at the edge of the light-emitting area. In the light-emitting circuit provided by the present application, due to the superposition of the first light-emitting element and the light-emitting elements on adjacent sides, the brightness in the middle of the light-emitting area is higher, and the circuit of the second branch is larger than the circuit of the first branch, so that the light-emitting area is located in the light-emitting area. The brightness of the second light-emitting element at the edge is greater than the brightness of the first light-emitting element in the bit light-emitting area, so that the brightness of the edge of the light-emitting area is the same as that of the middle of the light-emitting area, thereby ensuring the uniformity of the brightness of the backlight module.

Description

Light-emitting circuit, backlight module and display

technical field

The present application relates to the field of display technology, and in particular, to a light-emitting circuit, a backlight module having the light-emitting circuit, and a display having the backlight module.

Background technique

The description of the background technology in this application belongs to the relevant technology related to this application, and is only used to illustrate and facilitate the understanding of the application content of this application. prior art at the filing date.

With the rapid development of flat-panel display technology, liquid crystal displays (LCDs) are widely used in various information and communication consumer products due to their advantages of small size, high image quality, no radiation and low driving voltage. Since the liquid crystal display panel in the LCD itself does not emit light, it is necessary to set a backlight module on the back of the liquid crystal display panel as a backlight source to display images normally. Light emitting diodes (LEDs) have the characteristics of low energy consumption, small size, long life, and low temperature rise, and are usually used as the backlight source of liquid crystal display devices in the form of LED backlight modules.

In the design of the existing LED backlight driving circuit, the brightness of the LED lamps of different LED lamp groups is different, so that the brightness of the backlight is not uniform, which ultimately affects the display effect of the module screen.

Utility model content

The light-emitting circuit provided by the embodiment of the first aspect of the present application, applied to a backlight module, includes: a first branch, the first branch including a plurality of first light-emitting elements; and a second branch, the second branch The branch includes a plurality of second light-emitting elements; wherein, the operating current of the first branch is smaller than the operating current of the second branch, and a plurality of the first light-emitting elements and a plurality of the second light-emitting elements are formed In a light-emitting area, a plurality of the first light-emitting elements are located in the middle of the light-emitting area, and a plurality of the second light-emitting elements are located at the edge of the light-emitting area.

In the light-emitting circuit provided by the present application, due to the superposition of the first light-emitting element and the light-emitting elements on adjacent sides, the brightness in the middle of the light-emitting area is higher than that of the first light-emitting element, and the operating current of the second branch is greater than that of the first branch. The brightness of the second light-emitting element located at the edge of the light-emitting area is greater than that of the first light-emitting element located in the middle of the light-emitting area, so that the brightness of the edge of the light-emitting area is the same or approximately the same as the brightness of the middle of the light-emitting area, thus ensuring the backlight The uniformity of the brightness of the module improves the comfort of the product.

Optionally, the first light-emitting element is a light-emitting diode, and/or the second light-emitting element is a light-emitting diode; the output end of the first branch is connected to the output end of the second branch. Increase the technical effect of the content of the invention corresponding to the subordinate part.

In this embodiment, the first branch and the second branch share one output end, which reduces the layout of one line, thereby increasing the space for arranging lines; the light-emitting diode has the advantages of high light efficiency, low power consumption, long life, easy Control, maintenance-free, safety and environmental protection.

Optionally, the first branch includes a plurality of first subcircuits, and the second branch includes a plurality of second subcircuits.

In this embodiment, the first branch is divided into a plurality of first sub-circuits. When a problem occurs with the first light-emitting element, only the sub-circuit where it is located needs to be replaced, which is convenient and quick, improves the maintenance speed of the product, and thus improves the The use of the product is comfortable, thereby improving the market competitiveness of the product. In the same way, the second branch is divided into a plurality of second sub-circuits. When there is a problem with the second light-emitting element, only the sub-circuit where it is located needs to be replaced, which is convenient and quick, improves the maintenance speed of the product, and thus improves the use of the product. Comfort, thereby improving the market competitiveness of the product.

Optionally, the first sub-circuit and the second sub-circuit are integrated on a circuit board.

In this embodiment, the first sub-circuit and the second sub-circuit are integrated on a circuit board to form a light bar, and a plurality of light bars are spliced to form the light source of the backlight module. When the first light-emitting element on the circuit board and the When there is a problem with the second light-emitting element, only the circuit board where it is located needs to be replaced, which is convenient and quick, improves the maintenance speed of the product, thereby improves the use comfort of the product, and further improves the market competitiveness of the product.

Optionally, the circuit board is in the shape of a strip, the second sub-circuit is connected in series with the second light-emitting elements located at both ends of the strip-shaped circuit board, and the first sub-circuit is connected in series at the strip. The first light-emitting element at the middle position of the circuit board in the shape of a shape.

In this embodiment, the brightness of the second light-emitting element located at both ends of the strip-shaped circuit board is greater than the brightness of the first light-emitting element located in the middle of the strip-shaped circuit board, so that the brightness of the edge of the light-emitting area is the same as that of the middle of the light-emitting area. The brightness is the same or approximately the same, thereby ensuring the uniformity of the brightness of the backlight module and improving the comfort of the product.

Optionally, the first sub-circuit is integrated on the first branch board, and the second sub-circuit is integrated on the second branch board.

In this embodiment, the light-emitting circuit only includes two branches, which has a simple structure and is convenient for manufacturing, thereby improving the production efficiency of the product, thereby reducing the manufacturing cost of the product, and increasing the market competitiveness of the product.

Optionally, the first light-emitting elements of the first branch are connected in series with each other, and the second light-emitting elements of the second branch are connected in series with each other.

In this embodiment, in the first branch, the currents of the first light-emitting elements connected in series are the same, which ensures that the brightness of each first light-emitting element is the same; similarly, in the second branch, the first light-emitting elements connected in series with each other have the same current. The currents of the two light-emitting elements are the same, which ensures the same brightness of each second light-emitting element, thereby ensuring the uniformity of the brightness of the backlight module and improving the use comfort of the product.

An embodiment of the second aspect of the present application provides a backlight module, including any one of the light-emitting circuits described above.

The backlight module provided by the second aspect of the present application has uniform light emission and uniform brightness, which ensures the comfort of use of the product.

Embodiments of the third aspect of the present application provide a display including the above-mentioned backlight module.

The display provided by the third aspect of the present application has a uniform display and ensures the use comfort of the product.

Optionally, the display further includes: a first sensor, which detects the optical information on the edge of the light-emitting area of the backlight module in real time, and sends a first electrical signal; a second sensor, which detects in real time the second sensor optical information inside the light-emitting area of the backlight module, and send a second electrical signal; and a controller, the controller receives the first electrical signal and the second electrical signal, and according to the first electrical signal The signal and the second electrical signal adjust the current of the first branch or the second branch of the backlight module.

An embodiment of the fourth aspect of the present application provides a display, including a light-emitting circuit, the light-emitting circuit includes a first branch and a second branch; the first branch includes a plurality of first light-emitting elements, the The second branch includes a plurality of second light-emitting elements; wherein, a plurality of the first light-emitting elements and a plurality of the second light-emitting elements constitute a light-emitting area, and the plurality of the first light-emitting elements are located in the middle of the light-emitting area , a plurality of the second light-emitting elements are located at the edge of the light-emitting area; the display further includes: a first sensor, the first sensor detects the optical information on the edge of the light-emitting area in real time, and sends a first electrical signal; a second sensor, the second sensor detects the optical information inside the light-emitting area in real time, and sends a second electrical signal; and a controller, the controller receives the first electrical signal and the second electrical signal, and adjust the current of the first branch or the second branch according to the first electrical signal and the second electrical signal.

In the display provided by the present application, due to the superposition of the first light-emitting element of the light-emitting circuit and the light-emitting elements on the adjacent sides, the brightness in the middle of the light-emitting area is higher than that of the first light-emitting element, and the operating current of the second branch is greater than that of the first light-emitting element. The working current of the branch circuit makes the brightness of the second light-emitting element located at the edge of the light-emitting area greater than the brightness of the first light-emitting element located in the middle of the light-emitting area, so that the brightness of the edge of the light-emitting area is the same or approximately the same as the brightness of the middle of the light-emitting area, so as to ensure The uniformity of the brightness of the display is ensured, thereby ensuring the uniformity of the brightness of the display and improving the use comfort of the product.

Additional aspects and advantages of the present application will become apparent in the description section below, or learned by practice of the present application.

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily understood from the following description of embodiments in conjunction with the accompanying drawings, wherein:

FIG. 1 is a schematic structural diagram of an embodiment of the light-emitting circuit described in the present application;

FIG. 2 is a schematic structural diagram of another embodiment of the light-emitting circuit described in the present application;

3 is a schematic structural diagram of another embodiment of the light-emitting circuit described in the present application;

FIG. 4 is a structural block diagram of an embodiment of the display according to the present application.

Wherein, the corresponding relationship between the reference numerals and component names in Fig. 1 to Fig. 4 is:

The first branch 10, the first light-emitting element 11, the first sub-circuit 12, the second branch 20, the second light-emitting element 21, the second sub-circuit 22, the circuit board 31, the first branch board 32, the second branch The circuit board 33 includes the first sensor 40 , the second sensor 50 , the controller 60 , and the display 100 .

Detailed ways

In order to more clearly understand the above objects, features and advantages of the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments may be combined with each other in the case of no conflict.

Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific details disclosed below. Example limitations.

The following discussion provides various embodiments of the present application. Although each embodiment represents a single combination of the application, the various embodiments of the application may be substituted, or combined in combination, and thus the application may also be considered to encompass all possible combinations of the same and/or different embodiments recited. Thus, if one embodiment includes A, B, C and another embodiment includes a combination of B and D, then the application should also be considered to include all other possible combinations including one or more of A, B, C, D example, although this example may not be explicitly described in the following content.

As shown in FIG. 1 , the light-emitting circuit to which the embodiment of the first aspect of the present application is applied includes: a first branch 10 and a second branch 20 .

The first branch 10 includes a plurality of first light emitting elements 11 . (In the following embodiments, the Xth branch includes multiple sub-circuits, and the multiple sub-circuits are connected in parallel with each other, so the light-emitting elements of each branch cannot be completely regarded as "connected in series")

The second branch 20 includes a plurality of second light emitting elements 21 .

The operating current of the first branch 10 is smaller than the operating current of the second branch 20 , the plurality of first light-emitting elements 11 and the plurality of second light-emitting elements 21 constitute a light-emitting area, and the plurality of first light-emitting elements 11 are located in the light-emitting area. In the middle, a plurality of second light-emitting elements 21 are located at the edge of the light-emitting area.

In the light-emitting circuit provided by the present application, due to the superposition of the first light-emitting element 11 and the light-emitting elements on adjacent sides, the brightness in the middle of the light-emitting area is higher than that of the first light-emitting element 11, and the operating current of the second branch 20 is greater than The working current of the first branch 10 makes the brightness of the second light-emitting element 21 located at the edge of the light-emitting area greater than that of the first light-emitting element 11 in the light-emitting area, so that the brightness of the edge of the light-emitting area is the same as that of the middle of the light-emitting area or It is approximately the same, thus ensuring the uniformity of the brightness of the backlight module and improving the use comfort of the product.

As shown in FIG. 2 , in an embodiment of the present application, the first light-emitting elements 11 of the first branch 10 are connected in series with each other, and the first light-emitting elements 21 of the second branch 20 are connected in series with each other.

In this embodiment, in the first branch, the currents of the first light-emitting elements connected in series are the same, which ensures that the brightness of each first light-emitting element is the same; similarly, in the second branch, the first light-emitting elements connected in series with each other have the same current. The currents of the two light-emitting elements are the same, which ensures the same brightness of each second light-emitting element, thereby ensuring the uniformity of the brightness of the backlight module and improving the use comfort of the product.

As shown in FIG. 2 , in an embodiment of the present application, the output end of the first branch 10 is connected to the output end of the second branch 20 .

In this embodiment, the first branch 10 and the second branch 20 share one output terminal, which reduces the layout of one line, thereby increasing the space for arranging lines.

As shown in FIG. 2, in an embodiment of the present application, the first branch 10 includes a plurality of first sub-circuits 12, and the first light-emitting elements 11 on each first sub-circuit 12 are connected in series; the second branch 20 includes a plurality of second sub-circuits 22, and the first light-emitting elements 21 on each of the second sub-circuits 22 are connected in series with each other.

In this embodiment, the first branch 10 is divided into a plurality of first sub-circuits 12. When a problem occurs with the first light-emitting element 11, only the sub-circuit where it is located needs to be replaced, which is convenient and quick, and improves the maintenance speed of the product. Thereby, the use comfort of the product is improved, and the market competitiveness of the product is further improved. In the same way, the second branch 20 is divided into a plurality of second sub-circuits 22. When the second light-emitting element 21 has a problem, only the sub-circuit where it is located needs to be replaced, which is convenient and quick, and improves the maintenance speed of the product, thereby improving the performance of the product. The use of the product is comfortable, thereby improving the market competitiveness of the product.

As shown in FIG. 2, in an embodiment of the present application, a first sub-circuit 12 and a second sub-circuit 22 are integrated on a circuit board 31, and the first light-emitting element 11 and the second light-emitting element 21 are arranged in the circuit on board 31.

In this embodiment, the first sub-circuit 12 and the second sub-circuit 22 are integrated on a circuit board 31 to form a light bar, and a plurality of light bars are spliced to form the light source of the backlight module. When there is a problem with the first light-emitting element 11 and the second light-emitting element 21, only the circuit board 31 where they are located needs to be replaced, which is convenient and quick, improves the maintenance speed of the product, thus improves the use comfort of the product, and further improves the market competition of the product. force.

As shown in FIG. 2 , in an optional embodiment of the present application, the circuit board 31 is in the shape of a strip, the second light-emitting element 21 is located at both ends of the strip of the circuit board 31 , and the first light-emitting element 11 is located on the circuit board. 31 in the middle of the strip; that is, the second sub-circuit 22 is connected in series with the second light-emitting elements 21 located at both ends of the strip-shaped circuit board 31, and the first sub-circuit 12 is connected in series with the first light-emitting element located in the middle of the strip-shaped circuit board 31. 11.

As shown in FIG. 3 , in an embodiment of the present application, the first sub-circuit 12 (not shown in FIG. 3 ) is integrated on the first branch circuit board 32 (not shown in FIG. 3 ), and the second sub-circuit 22 (not shown in FIG. 3 ) Integrated on the second branch board 33 . The position marked 21 in the figure is wrong.

In this embodiment, the light-emitting circuit only includes two branches, which has a simple structure and is convenient for manufacturing, thereby improving the production efficiency of the product, thereby reducing the manufacturing cost of the product, and increasing the market competitiveness of the product.

In an embodiment of the present application, the first light-emitting element is a light-emitting diode, and/or the second light-emitting element is a light-emitting diode.

In this embodiment, the light emitting diode has the advantages of high light efficiency, low power consumption, long life, easy control, maintenance-free, safety and environmental protection.

The backlight module provided by the embodiment of the second aspect of the present application includes any one of the above-mentioned light-emitting circuits.

The backlight module provided by the second aspect of the present application has uniform light emission and uniform brightness, which ensures the comfort of use of the product.

The display 100 provided by the embodiment of the third aspect of the present application includes the above-mentioned backlight module.

The display 100 provided by the third aspect of the present application has a uniform display and ensures the use comfort of the product.

As shown in FIG. 4 , in an embodiment of the present application, the display 100 further includes: a first sensor 40 , a second sensor 50 and a controller 60 .

The first sensor 40 detects the optical information on the edge of the light-emitting area of the backlight module in real time, and sends a first electrical signal.

The second sensor 50 detects the optical information inside the light-emitting area of the backlight module in real time, and sends a second electrical signal.

The controller 60 receives the first electrical signal and the second electrical signal, and adjusts the current of the first branch 10 or the second branch 20 of the backlight module according to the first electrical signal and the second electrical signal.

In this embodiment, the optical information at the edge of the light-emitting area and the optical information in the middle of the light-emitting area are monitored in real time. When the optical information at the edge of the light-emitting area is different from the optical information at the edge of the light-emitting area, the controller 60 adjusts the first branch 10 or the first branch The currents of the two branches 20 make the optical information at the edge of the light-emitting area the same as the optical information at the edge of the light-emitting area, so as to ensure the uniformity of the brightness of the backlight module. In addition, the optical information includes the intensity of light, the brightness of light, and the like.

The display provided by the embodiment of the fourth aspect of the present application includes a light-emitting circuit, and the light-emitting circuit includes a first branch circuit and a second branch circuit; the first branch circuit includes a plurality of first light-emitting elements, and the second branch circuit includes a plurality of first branch circuits. Two light-emitting elements; wherein, a plurality of first light-emitting elements and a plurality of second light-emitting elements constitute a light-emitting area, a plurality of first light-emitting elements are located in the middle of the light-emitting area, and a plurality of second light-emitting elements are located at the edge of the light-emitting area.

In an embodiment of the present application, the display further includes: a first sensor, the first sensor detects the optical information at the edge of the light-emitting area in real time, and sends a first electrical signal; a second sensor, the second sensor detects the optical information inside the light-emitting area in real time information, and send a second electrical signal; and a controller, the controller receives the first electrical signal and the second electrical signal, and adjusts the current of the first branch or the second branch according to the first electrical signal and the second electrical signal.

In the display provided by the present application, due to the superposition of the first light-emitting element of the light-emitting circuit and the light-emitting elements on the adjacent sides, the brightness in the middle of the light-emitting area is higher than that of the first light-emitting element, and the operating current of the second branch is greater than that of the first light-emitting element. The working current of the branch circuit makes the brightness of the second light-emitting element located at the edge of the light-emitting area greater than the brightness of the first light-emitting element located in the middle of the light-emitting area, so that the brightness of the edge of the light-emitting area is the same or approximately the same as the brightness of the middle of the light-emitting area, so as to ensure The uniformity of the brightness of the display is ensured, thereby ensuring the uniformity of the brightness of the display and improving the use comfort of the product.

Obviously, the above-mentioned embodiments are only examples for clear description, and are not intended to limit the implementation manner. For those skilled in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need to be exhaustive here. And the obvious changes or changes derived from this are still within the scope of protection created by the present application.

In this application, the terms "first" and "second" are only used for the purpose of description, and should not be construed as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. In this application, terms such as "connected" and "fixed" should be understood in a broad sense. For example, "connected" can be connected by wires or by signals. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

The above descriptions are only specific embodiments of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the application, spirit or scope. The present application is therefore not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims (11)

1. The utility model provides a light-emitting circuit, is applied to backlight unit, its characterized in that includes:

a first branch including a plurality of first light emitting elements; and

a second branch including a plurality of second light emitting elements;

the working current of the first branch circuit is smaller than that of the second branch circuit, the first light-emitting elements and the second light-emitting elements form a light-emitting area, the first light-emitting elements are located in the middle of the light-emitting area, and the second light-emitting elements are located at the edge of the light-emitting area.

2. The lighting circuit according to claim 1,

the first light-emitting element is a light-emitting diode, and/or the second light-emitting element is a light-emitting diode; the output end of the first branch is connected with the output end of the second branch.

3. The lighting circuit according to claim 1,

the first branch includes a plurality of first sub-circuits and the second branch includes a plurality of second sub-circuits.

4. The lighting circuit according to claim 3,

a said first sub-circuit and a said second sub-circuit are integrated on a circuit board.

5. The lighting circuit according to claim 4,

the circuit board is in a strip shape, the second sub-circuits are connected in series with the second light-emitting elements positioned at two ends of the strip-shaped circuit board, and the first sub-circuits are connected in series with the first light-emitting elements positioned in the middle of the strip-shaped circuit board.

6. The lighting circuit according to claim 3,

the first sub-circuit is integrated on a first branch circuit board, and the second sub-circuit is integrated on a second branch circuit board.

7. The lighting circuit according to claim 1,

the first light emitting elements of the first branch are connected in series, and the second light emitting elements of the second branch are connected in series.

8. A backlight module comprising the light emitting circuit according to any one of claims 1 to 7.

9. A display comprising the backlight module of claim 8.

10. The display of claim 9, further comprising:

the first sensor detects optical information at the edge of a light emitting area of the backlight module in real time and sends a first electric signal;

the second sensor detects optical information in a light emitting area of the backlight module in real time and sends a second electric signal; and

and the controller receives the first electric signal and the second electric signal and adjusts the current of the first branch or the second branch of the backlight module according to the first electric signal and the second electric signal.

11. The display is characterized by comprising a light-emitting circuit, a first light-emitting diode and a second light-emitting diode, wherein the light-emitting circuit comprises a first branch circuit and a second branch circuit; the first branch comprises a plurality of first light emitting elements, and the second branch comprises a plurality of second light emitting elements; the first light-emitting elements and the second light-emitting elements form a light-emitting area, the first light-emitting elements are located in the middle of the light-emitting area, and the second light-emitting elements are located at the edge of the light-emitting area;

the display further includes:

the first sensor detects optical information at the edge of the luminous zone in real time and sends a first electric signal;

a second sensor that detects optical information inside the light emitting region in real time and transmits a second electrical signal; and

a controller that receives the first and second electrical signals and adjusts the current of the first or second branch according to the first and second electrical signals.

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