LED array driving structure

Abstract

The utility model discloses a kind of LED array driving structure, it is related to LED display technical field, comprising: by single root data signal line cascaded M row drive chip, M=2;By single root data signal line cascaded N column drive chip, N=2;And by X row*N column pixel point composition LED array, N column pixel point and N column drive chip one-to-one corresponding connection;Wherein, LED array is by a group of cascaded M row drive chip and a group of cascaded N column drive chip common drive;Or, in LED array, each column pixel point is by a group of cascaded M row drive chip and its corresponding connection one column drive chip common drive.The utility model can solve the problem that the driving signal line of existing LED array driving structure is more, wiring is complex, and the display transmittance of display screen is influenced.

Description

Technical Field

[0001] This application relates to the field of LED display technology, specifically to an LED array driving structure. Background Technology

[0002] LED transparent screens, LED sound-permeable screens, LED perforated screens, and LED grid screens are a branch of LED displays. They are characterized by high transparency and delicate display effects, and are widely used in glass curtain walls, shop windows, building glass curtain walls, various exhibition halls, art installations, cultural and tourism stages, and other scenarios.

[0003] However, existing LED array driving structures have many driving signal lines, complex wiring, and large driver chip area. When applied to scenarios with high requirements for display transparency, such as LED transparent screens, LED sound-permeable screens, LED perforated screens, LED grid screens, or LED light strip screens, the display effect is affected. Utility Model Content

[0004] This application provides an LED array driving structure to solve the problems of existing LED array driving structures having many driving signal lines, complex wiring, and affecting the display transparency of the screen.

[0005] To address the aforementioned problems, this application discloses an LED array driving structure, comprising: M row driver chips are cascaded through a single data signal line, where M ≥ 2; N column driver chips are cascaded through a single data signal line, where N ≥ 2; And an LED array consisting of X rows * N columns of pixels, with each of the N columns of pixels connected to one of the N column driver chips; The LED array is driven by a set of M cascaded row driver chips and a set of N cascaded column driver chips; or, in the LED array, each column pixel is driven by a set of M cascaded row driver chips and a corresponding column driver chip.

[0006] In some embodiments of this application, each pixel includes LEDs of m colors, where m ≥ 1.

[0007] In some embodiments of this application, each row driver chip includes multiple row driver terminals; Where M = X / 2^y, each row driver chip is connected to 2^y row pixels through 2^y row driver terminals, y ≥ 0 and is a positive integer, and 2^y represents 2 to the power of y.

[0008] In some embodiments of this application, each column driver chip is used to drive the pixels of its corresponding column; each column driver chip includes m constant current output channels, the m constant current output channels correspond one-to-one with the m colors in the pixels of its corresponding column, and each constant current output channel is used to drive the LED of its corresponding color.

[0009] In some embodiments of this application, each row driver chip includes a data signal input terminal DI and a data signal output terminal DO, and the data signal output terminal DO of the previous row driver chip and the data signal input terminal DI of the next row driver chip are connected through a data signal line; each column driver chip includes a data signal input terminal DI and a data signal output terminal DO, and the data signal output terminal DO of the previous column driver chip and the data signal input terminal DI of the next column driver chip are connected through a data signal line.

[0010] In some embodiments of this application, in the LED array, each column of pixels is driven by a set of M cascaded row driver chips and a corresponding column driver chip; wherein each column of pixels, the M row driver chips for driving the column of pixels, and the column driver chip for driving the column of pixels are located on the same light strip.

[0011] In some embodiments of this application, in the LED array, each column of pixels is driven by a set of M cascaded row driver chips and a corresponding column driver chip; wherein, the data signal input terminal of the first-level row driver chip among the M row driver chips used to drive the (n+1)th column pixel is connected to the data signal output terminal of the column driver chip used to drive the nth column pixel, and 1≤n<N.

[0012] In some embodiments of this application, the LED array is driven by a set of M cascaded row driver chips and a set of N cascaded column driver chips; wherein the LED array and the M row driver chips and N column driver chips used to drive the LED array are located on one or more display unit boards.

[0013] In some embodiments of this application, it further includes: a receiving card; the receiving card is connected to the data signal input terminal of the target row driver chip and the data signal input terminal of the first-level column driver chip for driving the first column of pixels in the LED array; wherein, the target row driver chip is the first-level row driver chip among the M row driver chips for driving the first column of pixels in the LED array.

[0014] In some embodiments of this application, each pixel includes LEDs of three colors: red LED, green LED, and blue LED.

[0015] This utility model has the following advantages: This invention provides an LED array driving structure. The LED array is driven by M row driver chips cascaded with a single data signal line and N column driver chips cascaded with a single data signal line. Specifically, the LED array can be driven by a set of M cascaded row driver chips and a set of N cascaded column driver chips, or each column pixel in the LED array can be driven by a set of M cascaded row driver chips and a corresponding column driver chip. Compared with the prior art, this single-line cascaded driving structure for both row and column driving greatly saves wiring space. On the other hand, unlike the prior art where a single column driver chip drives multiple columns of pixels simultaneously, in this application, each column pixel in the LED array is driven by a single column driver chip. This facilitates control over the spacing between each column of pixels and improves the display's transparency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application.

[0017] Figure 1 This is a schematic diagram of an LED array driving structure according to an embodiment of this application. Figure 1 ; Figure 2 This is a schematic diagram of an LED array driving structure according to an embodiment of this application. Figure 2 ; Figure 3 This is a schematic diagram of an LED array driving structure according to an embodiment of this application. Figure 3 ; Figure 4 This is a schematic diagram of an LED array driving structure according to an embodiment of this application. Figure 4 .

[0018] Figure label: 101 - Row driver chip, 201 - Column driver chip, 301 - Receiver card, 401 - Row driver terminal, 501 - Data signal line. Detailed Implementation

[0019] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0020] Hereinafter, the terms "second," "first," etc., are used for descriptive convenience only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "second," "first," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0021] In the embodiments of this application, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly, and can refer to direct connection or indirect connection through an intermediate medium.

[0022] In this embodiment of the application, "and / or" describes the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following associated objects have an "or" relationship.

[0023] This application proposes an LED array driving structure, referencing... Figures 1-4 The driving structure includes M row driving chips 101 cascaded through a single data signal line 501, where M ≥ 2; N column driving chips 201 cascaded through a single data signal line 501, where N ≥ 2; and an LED array composed of X rows * N columns of pixels, with each of the N columns of pixels corresponding to one of the N column driving chips 201.

[0024] The LED array is driven by one or more sets of single-line cascaded row driver chips 101 and one set of single-line cascaded column driver chips 201. However, depending on the actual application scenario of the LED array, the number and structure of the row driver chips 101 used to drive the LED array are different. For example, it can be represented as a dot matrix display structure or a light strip display structure.

[0025] It is worth noting that both of these LED array driving structures employ specific technologies: On the one hand, the LED array is driven by row driver chips 101 cascaded with single data signal lines 501 and column driver chips 201 cascaded with single data signal lines 501. Regardless of whether the LED array is a dot matrix display structure or a light strip display structure, this significantly saves wiring space compared to existing technologies where both row and column drivers are cascaded with single lines. On the other hand, unlike existing technologies where a single column driver chip 201 drives multiple columns of pixels simultaneously, in this application, each column of pixels in the LED array is driven by a single column driver chip 201. This facilitates control over the spacing between each column of pixels and thus helps control the display's transmittance.

[0026] As is known in the art, single-line transmission generally uses return-to-zero (RZ) encoding. Regarding the single-line transmission and processing methods of the cascaded driver chips in this application—how they process the single-line input data signal and how they output the data signal to the next-level driver chip—refer to relevant existing technologies. Single-line transmission technology is a mature technology in this field, and this application does not limit it. This application utilizes this mature technology to form a structure in which a row driver chip 101 and a column driver chip 201 are simultaneously cascaded in a single-line manner, thereby reducing the number of drive signal lines on the display screen and improving display transparency.

[0027] The following describes the LED array driving structure corresponding to the two scenarios mentioned above (dot matrix display and light strip display).

[0028] refer to Figures 1-3 In some embodiments of this application, the driving structure is a display screen structure. The LED array driving structure may include: M row driving chips 101 cascaded through a single data signal line 501, where M≥2; N column driving chips 201 cascaded through a single data signal line 501, where N≥2; and an LED array composed of X rows * N columns of pixels, with each of the N columns of pixels corresponding to one of the N column driving chips 201. The LED array is driven by a set of cascaded M row driving chips 101 and a set of cascaded N column driving chips 201.

[0029] Each pixel in this array comprises m LEDs of different colors, where m ≥ 1. That is, the pixels in this LED array can be monochrome or multi-colored. For example... Figure 1 As shown, m is 3, and each pixel includes LEDs of 3 colors: red LED, green LED, and blue LED.

[0030] Each column driver chip 201 includes a data signal input terminal DI and a data signal output terminal DO. The data signal output terminal DO of the previous column driver chip 201 and the data signal input terminal DI of the next column driver chip 201 are connected through a data signal line 501. N column driver chips 201 are cascaded in this structure to form a single-line cascaded N column driver chips 201 structure.

[0031] Since there is a one-to-one correspondence between the N columns of pixels and the N column driver chips 201, meaning each column of pixels is driven by one column driver chip 201, each column driver chip 201 is used to drive the pixels in its corresponding column. Taking m as 3 as an example, each column driver chip 201 includes 3 constant current output channels, and the 3 constant current output channels correspond one-to-one with the 3 colors in the LED pixels of its corresponding column. Each constant current output channel is used to drive the LED of its corresponding color.

[0032] Each row driver chip 101 also includes a data signal input terminal DI and a data signal output terminal DO. The data signal output terminal DO of the previous row driver chip 101 and the data signal input terminal DI of the next row driver chip 101 are connected through a data signal line 501. M row driver chips 101 are cascaded in this structure to form a single-line cascaded structure of M row driver chips 101.

[0033] Each row driver chip 101 includes multiple row driver terminals 401; M = X / 2^y, each row driver chip 101 is connected to 2^y rows of pixels through 2^y row driver terminals 401, where y ≥ 0 and is a positive integer, and 2^y represents 2 to the power of y. In this embodiment, the number of row driver chips 101 used and the number of rows of pixels driven by each row driver chip 101 are related to the total number of rows in the LED array. The following example uses X as 32 rows and y values ​​of 0, 1, and 2 respectively for illustration.

[0034] For example, refer to Figure 1 X=32, y=0, M=32 / 2^0=32, that is, in the case of 32 rows of pixels, this embodiment can use 32 row driving chips 101, and each row driving chip 101 is connected to one row of pixels through one row driving terminal 401.

[0035] For example, refer to Figure 2 X=32, y=1, M=32 / 2^1=16, that is, in the case of 32 rows of pixels, this embodiment can use 16 row driving chips 101, and each row driving chip 101 is connected to 2 rows of pixels through 2 row driving terminals 401.

[0036] For example, refer to Figure 3 X=32, y=2, M=32 / 2^2=8, that is, in the case of 32 rows of pixels, this embodiment can use 8 row driving chips 101, and each row driving chip 101 is connected to 4 rows of pixels through 4 row driving terminals 401.

[0037] In practical applications, the number of row driver chips 101 used to drive the LED array and the number of rows driven by each row driver chip 101 can be determined based on the display screen size and display transparency.

[0038] In this embodiment, the LED array is driven by a set of M cascaded row driver chips 101 and a set of N cascaded column driver chips 201. The LED array, along with the M row driver chips 101 and N column driver chips 201 used to drive the LED array, are located on one or more display unit boards. For example, an LED array with 32 rows * 16 columns of pixels, along with 32 row driver chips 101 and 16 column driver chips 201, are located on the same display unit board. Each of the 32 row driver chips 101 drives the corresponding row of pixels through its row driver terminal 401. When the LED array and the M row driver chips 101 and N column driver chips 201 used to drive the LED array are located on multiple display unit boards, the multiple unit boards are spliced ​​together to form a display screen. This splicing structure is generally applicable to large-screen displays to save on display unit board costs and facilitate transportation.

[0039] The LED array driving structure may further include a receiver card 301. The receiver card 301 is a component used to receive data signals sent by the transmitter card to control the operation of the row driver chip 101 and the column driver chip 201. The specific control principle can be found in existing technology and will not be elaborated here. (Reference) Figures 1-3 In this embodiment, the receiving card 301 is connected to the data signal input terminal of the target row driver chip 101 and the data signal input terminal of the first-level column driver chip 201 used to drive the first column of pixels in the LED array. The target row driver chip 101 is the first-level row driver chip 101 among the M row driver chips 101 used to drive the first column of pixels in the LED array. The receiving card 301 transmits the received data signal to the target row driver chip 101 and the first-level column driver chip 201 used to drive the first column of pixels in the LED array via a single data signal line 501. The target row driver chip 101 processes the data signal and outputs the data signal to the cascaded next-level row driver chip 101... Correspondingly, the first-level column driver chip 201 processes the data signal and outputs the data signal to the cascaded next-level column driver chip 201... refer to Figure 4 In other embodiments of this application, the LED array is a light strip structure. The LED array driving structure may include: M row driving chips 101 cascaded through a single data signal line 501, where M≥2; N column driving chips 201 cascaded through a single data signal line 501, where N≥2; and an LED array composed of X rows * N columns of pixels, where the N columns of pixels are connected one-to-one with the N column driving chips 201. In the LED array, each column of pixels is driven by a set of M cascaded row driving chips 101 and a corresponding column driving chip 201.

[0040] Each pixel in this array comprises m LEDs of different colors, where m ≥ 1. That is, the pixels in this LED array can be monochrome or multi-colored. For example... Figure 4 As shown, m is 3, and each pixel includes LEDs of 3 colors: red LED, green LED, and blue LED.

[0041] Each column driver chip 201 includes a data signal input terminal DI and a data signal output terminal DO. The data signal output terminal DO of the previous column driver chip 201 and the data signal input terminal DI of the next column driver chip 201 are connected through a data signal line 501. N column driver chips 201 are cascaded in this structure to form a single-line cascaded N column driver chips 201 structure.

[0042] Since there is a one-to-one correspondence between the N columns of pixels and the N column driver chips 201, meaning each column of pixels is driven by one column driver chip 201, each column driver chip 201 is used to drive the pixels in its corresponding column. Taking m as 3 as an example, each column driver chip 201 includes 3 constant current output channels, and the 3 constant current output channels correspond one-to-one with the 3 colors in the LED pixels of its corresponding column. Each constant current output channel is used to drive the LED of its corresponding color.

[0043] In this embodiment, in the LED array, each column of pixels is driven by a set of M cascaded row driver chips 101 and a corresponding column driver chip 201. Each column of pixels, the M row driver chips 101 driving that column, and the column driver chip 201 driving that column are located on the same LED strip. Therefore, the data signal input terminal of the first-stage row driver chip 101 among the M row driver chips 101 driving the (n+1)th column of pixels can be connected to the data signal output terminal of the column driver chip 201 driving the nth column of pixels to achieve synchronized display of each LED strip, where 1 ≤ n < N. Figure 4 As shown, on the light strip 2, the data signal input terminal DI of the first-level row driver chip 101 (i.e., row tube 1) of the M cascaded row driver chips 101 is connected to the data signal output terminal DO of the column driver chip 201 on the light strip 1.

[0044] For the M row driver chips 101 that drive each light bar, each row driver chip 101 also includes a data signal input terminal DI and a data signal output terminal DO. The data signal output terminal DO of the previous row driver chip 101 and the data signal input terminal DI of the next row driver chip 101 are connected through a data signal line 501. The M row driver chips 101 are cascaded in this structure to form a single-line cascaded structure of M row driver chips 101.

[0045] In this embodiment, each row driver chip 101 may also include multiple row driver terminals 401; M = X / 2^y, each row driver chip 101 is connected to 2^y rows of pixels through 2^y row driver terminals 401, where y ≥ 0 and is a positive integer. The relevant explanations here can be found in the preceding text and will not be repeated here. Figure 4 As shown, the 32 rows of pixels are driven by 32 row driver chips 101, and the multiple row driver terminals 401 of each row driver chip 101 are connected together to the pixels of the corresponding row.

[0046] The LED array driving structure may further include a receiver card 301. The receiver card 301 is a component used to receive display data and instruction information sent by the transmitting card to control the operation of the row driver chip 101 and the column driver chip 201. The specific control principle can be found in existing technology and will not be elaborated here. (Reference) Figure 4 In this embodiment, the receiving card 301 is connected to the data signal input terminal of the target row driver chip 101 and the data signal input terminal of the first-level column driver chip 201 used to drive the first column of pixels in the LED array. The target row driver chip 101 is the first-level row driver chip 101 among the M row driver chips 101 used to drive the first column of pixels in the LED array. The receiving card 301 transmits the received data signal to the target row driver chip 101 and the first-level column driver chip 201 used to drive the first column of pixels in the LED array via a single data signal line 501. The target row driver chip 101 processes the data signal and outputs the data signal to the cascaded next-level row driver chip 101... Correspondingly, the first-level column driver chip 201 processes the data signal and outputs the data signal to the cascaded next-level column driver chip 201... It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0047] The technical solutions provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand this application, and the content of this specification should not be construed as a limitation of this application. Furthermore, for those skilled in the art, there will be different forms of changes in the specific implementation methods and application scope based on this application. It is neither necessary nor possible to exhaustively list all implementation methods here, and obvious changes or modifications derived therefrom are still within the protection scope of this application.

Claims

1. An LED array driving structure, characterized in that, include: M row driver chips are cascaded through a single data signal line, where M ≥ 2; N column driver chips are cascaded through a single data signal line, where N ≥ 2; And an LED array consisting of X rows * N columns of pixels, with each of the N columns of pixels connected to one of the N column driver chips; The LED array is driven by a set of M cascaded row driver chips and a set of N cascaded column driver chips; or, in the LED array, each column pixel is driven by a set of M cascaded row driver chips and a corresponding column driver chip.

2. The LED array driving structure according to claim 1, characterized in that, Each pixel includes LEDs of m colors, where m ≥ 1.

3. The LED array driving structure according to claim 2, characterized in that, Each row driver chip includes multiple row driver terminals; Where M = X / 2^y, each row driver chip is connected to 2^y row pixels through 2^y row driver terminals, y ≥ 0 and is a positive integer, and 2^y represents 2 to the power of y.

4. The LED array driving structure according to claim 2, characterized in that, Each column driver chip is used to drive the pixels in its corresponding column; Each column driver chip includes m constant current output channels, each of which corresponds one-to-one with the m colors in the corresponding column pixel. Each constant current output channel is used to drive the LED of its corresponding color.

5. The LED array driving structure according to claim 1, characterized in that, Each row driver chip includes a data signal input terminal DI and a data signal output terminal DO. The data signal output terminal DO of the previous row driver chip and the data signal input terminal DI of the next row driver chip are connected through the data signal line. Each column driver chip includes a data signal input terminal DI and a data signal output terminal DO. The data signal output terminal DO of the previous-level column driver chip and the data signal input terminal DI of the next-level column driver chip are connected through the data signal line.

6. The LED array driving structure according to claim 1, characterized in that, In the LED array, each column of pixels is driven by a set of M cascaded row driver chips and a corresponding column driver chip. Each column of pixels, the M row driver chips used to drive that column of pixels, and the column driver chip used to drive that column of pixels are located on the same light strip.

7. The LED array driving structure according to claim 1 or 6, characterized in that, In the LED array, each column of pixels is driven by a set of M cascaded row driver chips and a corresponding column driver chip. The data signal input terminal of the first-level row driver chip among the M row driver chips used to drive the (n+1)th column pixel is connected to the data signal output terminal of the column driver chip used to drive the nth column pixel, where 1 ≤ n < N.

8. The LED array driving structure according to claim 1, characterized in that, The LED array is driven by a set of M cascaded row driver chips and a set of N cascaded column driver chips. The LED array, along with the M row driver chips and N column driver chips used to drive the LED array, are located on one or more display unit boards.

9. The LED array driving structure according to claim 1, 6, or 8, characterized in that, Also includes: receiving card; The receiving card is connected to the data signal input terminal of the target row driver chip and the data signal input terminal of the first-level column driver chip used to drive the first column of pixels in the LED array; The target row driver chip is the first-level row driver chip among the M row driver chips used to drive the first column of pixels in the LED array.

10. The LED array driving structure according to claim 2, characterized in that, Each pixel includes three colors of LEDs: red, green, and blue.

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