TWI798079B - Main control chip, LED display control box and LED display device - Google Patents

Abstract

The present invention mainly discloses a main control chip, which is used to be integrated on a main board accommodated in an LED display control box, and includes: a main control unit, a video signal receiving unit, a signal processing unit, and an LED control unit . Under the control of the main control unit, the signal processing unit receives a video signal through the video receiving unit, and performs a display area interception operation, a gamma mapping operation, a brightness and chromaticity correction operation, and After the display data arrangement operation, at least one display control signal is generated and output. Finally, the LED control unit performs display control on an LED display unit coupled to the LED display control box. Simply put, the main control chip is integrated on the main board so as to be coupled to the LED display unit (LED light board) through the main board. According to this design, the number of peripheral electronic components/chips is greatly reduced, which reduces the cost and failure rate at the same time.

Description

Main control chip, LED display control box and LED display device

The invention relates to the technical field of LED display devices, especially a main control chip that can directly receive HDMI/DVI video signals, analyze the video signals and generate LED display control signals.

Light-emitting diodes (Light-Emitting Diodes, LEDs) are currently widely used light-emitting elements. Due to their advantages of small size and long service life, they have been widely used in lighting devices and display devices. The LED display device is a self-illuminating flat-panel display device, which has the advantages of bright colors, wide dynamic range, high brightness, long life, and high reliability. The LED display device with a large screen has been widely used in large squares, commercial advertisements, Sports venues, information dissemination, news releases, stock exchange venues, as a public display medium.

FIG. 1 shows a structure diagram of a conventional LED display device. As shown in Figure 1, the conventional LED display device 1a includes: at least one receiving card 11a and at least one LED display unit 12a, wherein the LED display unit 12a includes an LED display panel and a plurality of LED display panels for driving the LED display panel. driver chips. During normal operation, the upper computer 2a (such as a notebook computer) transmits the display data and related control signals to each of the receiving cards 11a through a sending card 21a, so that each of the receiving cards 11a can correspond to each of the LED display units. 12a executes display control, so that each of the LED display panels performs image display.

In more detail, the LED display device 1a with the structure shown in Figure 1 is usually used in places that require large-size screens for display. Complex, bulky and costly. Therefore, the LED display device 1a with the structure shown in FIG. 1 cannot meet the requirements of low-cost, low-thickness and portable LED displays.

In view of this, manufacturers of LED display devices have introduced portable LED display solutions. FIG. 2 is a structural diagram of a conventional LED display device with an LED display control box. As shown in Figure 2, the conventional LED display device 1b: an LED display control box 11b and at least one LED display unit 12b, wherein the LED display unit 12b includes an LED display panel and a plurality of LED display panels for driving A driving chip, and at least two receiving cards 111b are integrated on a main board in the LED display control box 11b. During normal operation, the upper computer transmits display data and related control signals to each of the receiving cards 111b located in the LED display control box 11b through a sending card, so that each of the receiving cards 111b correspondingly responds to each of the LEDs. The display unit 12 executes display control, so that each of the LED display panels performs image display.

At present, in the prior art, each receiving card 111b is made into a core board to be integrated on the main board in the LED display control box 11b, and then connected to the LED display unit 12b through a hub device (HUB). Therefore, both the receiving card 111b and the main board have their own thickness and size. If the thickness and size of the two are not greatly optimized, the product thickness of the LED display control box 11b is too thick, causing inconvenience for users to carry.

It can be seen from the above description that there is an urgent need in the art for a new type of main control chip and an LED display control box including the main control chip.

The main purpose of the present invention is to provide a main control chip and an LED display control box comprising the main control chip, wherein the main control chip is used to be integrated on a main board accommodated in the LED display control box, and includes: a The main control unit, a video signal receiving unit, a signal processing unit, and an LED control unit. Under the control of the main control unit, the signal processing unit receives a video signal through the video receiving unit, and performs a display area interception operation, a gamma mapping operation, a brightness and chromaticity correction operation, and After the display data arrangement operation, at least one display control signal is generated and output. Finally, the LED control unit performs display control on an LED display unit coupled to the LED display control box. Simply put, the main control chip is integrated on the main board so as to be coupled to the LED display unit (LED light board) through the main board. According to this design, the number of peripheral electronic components/chips is greatly reduced, which reduces the cost and failure rate at the same time.

In addition, a programmable MCU can also be embedded in the main control chip of the present invention and coupled to a brightness sensor. With such a design, the brightness of the LED light panel can be automatically adjusted according to the brightness of the ambient light.

To achieve the above object, the present invention proposes an embodiment of the main control chip, which is used to be integrated on a main board accommodated in an LED display control box, and includes: a main control unit; a video receiving unit, coupled to a video receiving interface provided on the main board, and coupled to the main control unit; A signal processing unit, coupled to the video receiving unit and the main control unit; wherein, under the control of the main control unit, the signal processing unit receives a video signal through the video receiving unit, and executes a method on the video signal generating and outputting at least one display control signal after the display area clipping operation, a gamma mapping operation, a luminance and chromaticity correction operation, and a display data arrangement operation; and An LED control unit, coupled to the signal processing unit, is used to control the display of an LED display unit electrically connected to the LED display control box according to the at least one display control signal.

In one embodiment, the aforementioned main control chip of the present invention further includes: a video transmission unit, coupled to a video transmission interface provided on the main board, and coupled to the main control unit; a register, coupled to the main control unit; at least one serial communication unit coupled to the register; and A flash memory is coupled to the main control unit.

In one embodiment, the aforementioned main control chip of the present invention further includes: a micro-control unit, coupled to the main control unit, and simultaneously arranged on a brightness sensor on the main board; Wherein, the micro control unit controls the brightness sensor to sense an ambient light brightness, so as to transmit an ambient light brightness sensing signal to the main control unit, so that the main control unit generates an ambient light brightness sensing signal according to the ambient light brightness sensing signal. A display brightness adjustment signal is sent to the signal processing unit.

In one embodiment, the serial communication unit is a communication unit selected from the group consisting of an I2C communication unit and an SPI communication unit.

In one embodiment, both the video receiving interface and the video transmitting interface are a video transmission interface selected from the group consisting of an HDMI connector, a micro connector, a Type-C connector, and a Lightning connector .

Moreover, the present invention also proposes an LED display control box, which is used to form an LED display device together with at least one LED display unit, and has a display control module including a main board; it is characterized in that the display control module has a A main control chip on the main board, and the main control chip includes: a main control unit; a video receiving unit, coupled to a video receiving interface arranged on the main board, and coupled to the main control unit; A signal processing unit, coupled to the video receiving unit and the main control unit; wherein, under the control of the main control unit, the signal processing unit receives a video signal through the video receiving unit, and executes a method on the video signal generating and outputting at least one display control signal after the display area clipping operation, a gamma mapping operation, a luminance and chromaticity correction operation, and a display data arrangement operation; and An LED control unit, coupled to the signal processing unit, is used to control the display of an LED display unit electrically connected to the LED display control box according to the at least one display control signal.

In one embodiment of the aforementioned LED display control box of the present invention, the main control chip further includes: a video transmission unit, coupled to a video transmission interface provided on the main board, and coupled to the main control unit; a register, coupled to the main control unit; at least one serial communication unit coupled to the register; and A flash memory is coupled to the main control unit.

In one embodiment of the aforementioned LED display control box of the present invention, the main control chip further includes: a micro-control unit, coupled to the main control unit, and simultaneously arranged on a brightness sensor on the main board; Wherein, the micro control unit controls the brightness sensor to sense an ambient light brightness, so as to transmit an ambient light brightness sensing signal to the main control unit, so that the main control unit generates an ambient light brightness sensing signal according to the ambient light brightness sensing signal. A display brightness adjustment signal is sent to the signal processing unit.

In one embodiment, the serial communication unit is a communication unit selected from the group consisting of an I2C communication unit and an SPI communication unit, and the video receiving interface and the video sending interface are both selected from the group consisting of an I2C communication unit and an SPI communication unit. A video transmission interface in the group consisting of HDMI connector, micro connector, Type-C connector, and Lightning connector.

Furthermore, the present invention also discloses an LED display device, which is characterized in that it includes at least one LED display unit and an LED display control box of the present invention as described above.

In order to enable your examiners to further understand the structure, features, purpose, and advantages of the present invention, drawings and detailed descriptions of preferred specific embodiments are hereby attached.

FIG. 3 is a structural diagram of an LED display device with an LED display control box according to the present invention. As shown in Fig. 3, the LED display device 1: an LED display control box 11 and at least one LED display unit 12; wherein, the LED display unit 12 includes an LED display panel and a plurality of drivers for driving the LED display panel wafer. According to the design of the present invention, the LED display control box has a display control module 111 including a main board, and the display control module 111 also has a main control chip arranged on the main board.

FIG. 4 is a block diagram of a main control chip of the present invention. As shown in FIG. 4 , the main control chip 2 of the present invention is used to be integrated on a main board accommodated in the LED display control box 11 , so as to be included in the display control module 111 . According to the design of the present invention, the main control chip 2 mainly includes: a main control unit 20 , a video signal receiving unit 21 , a signal processing unit 22 , and an LED control unit 23 . As shown in FIG. 4 , the video receiving unit 21 is coupled to a video receiving interface 1111 disposed on the main board and coupled to the main control unit 20 . On the other hand, the signal processing unit 22 is coupled to the video receiving unit 21 and the main control unit 20; wherein, under the control of the main control unit 20, the signal processing unit 22 receives a video signal through the video receiving unit 21 , and after performing a display area cropping operation, a gamma mapping operation, a brightness and chromaticity correction operation, and a display data arrangement operation on the video signal, at least one display control signal is generated and output. Moreover, the LED control unit 23 is coupled to the signal processing unit 22 for display control of an LED display unit 12 electrically connected to the LED display control box 11 according to the at least one display control signal.

In short, the main control chip 2 is integrated on the main board of the display control module 111, so as to be coupled to the LED display unit 12 (LED light board) through the main board. According to this design, the number of peripheral electronic components/chips is greatly reduced, which reduces the cost and failure rate at the same time. In more detail, as shown in FIG. 4, the main control chip 2 of the present invention further includes a micro-control unit 29, which is coupled to the main control unit 20, and is simultaneously arranged on a brightness sensor on the main board. device 1113. According to this design, the micro control unit 29 controls the brightness sensor 1113 to sense an ambient light brightness, thereby sending an ambient light brightness sensing signal to the main control unit 20, so that the main control unit 20 The signal is sensed to generate a display brightness adjustment signal to the signal processing unit 22 . To put it simply, a programmable MCU (that is, the micro control unit 29 ) can also be embedded inside the main control chip 2 of the present invention and coupled to a brightness sensor 1113 . With such a design, the brightness of the LED light panel can be automatically adjusted according to the brightness of the ambient light.

As shown in FIG. 4 , the main control chip 2 of the present invention further includes: a video transmission unit 24 , a register 25 , at least one serial communication unit ( 26 , 27 ), and a flash memory 28 . Wherein, the video transmission unit 24 is coupled to a video transmission interface 1112 disposed on the motherboard, and is coupled to the main control unit 20 . When actually manufacturing the LED display control box 11 of the present invention, HDMI connectors, micro connectors, Type-C connectors, or Lightning connectors can be selected as the video receiving interface 1111 and the video sending interface 1112 according to application requirements.

In more detail, the register 25 is coupled to the main control unit 20, the at least one serial communication unit (26, 27) is coupled to the register 25, and the flash memory 28 is coupled to the main control unit 20. As shown in Fig. 4, the present invention exemplarily embeds an I2C communication unit 26 and an SPI communication unit 27 inside the main control chip 2, so that the main control chip 2 can communicate through the I2C communication unit 26 or the SPI The unit 27 communicates or transmits data with other surrounding chips. Furthermore, it should be understood that the algorithms required to perform the gamma mapping operation and the luma correction operation can be stored in the flash memory 28 as files.

In this way, the above has completely and clearly described a main control chip of the present invention and the LED display control box comprising it; and, through the above, it can be known that the present invention has the following advantages:

(1) The present invention discloses a main control chip, which is used to be integrated on a main board accommodated in an LED display control box, and includes: a main control unit, a video receiving unit, a signal processing unit, and a LED control unit. Under the control of the main control unit, the signal processing unit receives a video signal through the video receiving unit, and performs a display area interception operation, a gamma mapping operation, a brightness and chromaticity correction operation, and After the display data arrangement operation, at least one display control signal is generated and output. Finally, the LED control unit performs display control on an LED display unit coupled to the LED display control box. Simply put, the main control chip is integrated on the main board so as to be coupled to the LED display unit (LED light board) through the main board. According to this design, the number of peripheral electronic components/chips is greatly reduced, which reduces the cost and failure rate at the same time.

(2) Further, the present invention also discloses an LED display control box, which is used to form an LED display device together with at least one LED display unit, and has a display control module including a main board; it is characterized in that the display control The module has the main control chip of the present invention as described above.

(3) The present invention also discloses an LED display device, which is characterized in that it includes at least one LED display unit and an LED display control box of the present invention as described above.

It must be emphasized that what is disclosed in the above-mentioned case is a preferred embodiment, and all partial changes or modifications derived from the technical ideas of this case and easily deduced by those familiar with the technology are all inseparable from the patent of this case. category of rights.

To sum up, the purpose, means and efficacy of this case all show that it is very different from the conventional technology, and its first invention is practical, and indeed meets the patent requirements of the invention. I implore your review committee to be aware and grant a patent as soon as possible to benefit you. Society is for the Most Prayer.

1a: LED display device 11a: receiving card 12a: LED display unit 2a: PC 21a: Send card 1b: LED display device 11b: LED display control box 111b: receiving card 12b: LED display unit 1: LED display device 11: LED display control box 111: display control module 1111: video receiving interface 1112: Video transmission interface 1113: Brightness sensor 12: LED display unit 2: Main control chip 20: Main control unit 21: Video receiving unit 22: Signal processing unit 23: LED control unit 25: scratchpad 26: I2C communication unit 27: SPI communication unit 28: Flash memory

FIG. 1 is a structural diagram of a conventional LED display device; Fig. 2 is a structure diagram of a known LED display device with an LED display control box; 3 is a structural diagram of an LED display device with an LED display control box according to the present invention; and FIG. 4 is a block diagram of a main control chip of the present invention.

2: Main control chip

20: Main control unit

21: Video receiving unit

22: Signal processing unit

23: LED control unit

24: Video transmission unit

25: scratchpad

26: I2C communication unit

27: SPI communication unit

28: Flash memory

Claims (10)

A main control chip is used to be integrated on a main board accommodated in an LED display control box, and includes: a main control unit; a video receiving unit coupled to a video receiving interface arranged on the main board, and coupled to the main control unit; a signal processing unit coupled to the video receiving unit and the main control unit; wherein, under the control of the main control unit, the signal processing unit receives a video signal through the video receiving unit, And after performing a display area interception operation, a gamma mapping operation, a brightness and chromaticity correction operation, and display data arrangement operation on the video signal, generate and output at least one display control signal; and an LED control unit, coupled to The signal processing unit is used for performing display control on an LED display unit electrically connected to the LED display control box according to the at least one display control signal. The main control chip as described in claim 1 further includes: a video transmission unit, coupled to a video transmission interface provided on the main board, and coupled to the main control unit; a register, coupled to the a main control unit; at least one serial communication unit coupled to the register; and a flash memory coupled to the main control unit. The main control chip as described in claim 2 further includes: A micro-control unit, coupled to the main control unit, and at the same time arranged on a brightness sensor on the main board; wherein, the micro-control unit controls the brightness sensor to sense an ambient light brightness, thereby transmitting an ambient light The light brightness sensing signal is sent to the main control unit, so that the main control unit generates a display brightness adjustment signal to the signal processing unit according to the ambient light brightness sensing signal. The main control chip according to claim 2, wherein the serial communication unit is a communication unit selected from the group consisting of an I2C communication unit and an SPI communication unit. The main control chip as described in claim 2, wherein the video receiving interface and the video transmitting interface are selected from the group consisting of HDMI connectors, micro connectors, Type-C connectors, and Lightning connectors One of the video transmission interfaces. An LED display control box is used to form an LED display device together with at least one LED display unit, and has a display control module including a main board; A control chip, and the main control chip includes: a main control unit; a video receiving unit, coupled to a video receiving interface arranged on the main board, and coupled to the main control unit; a signal processing unit, coupled to the A video receiving unit and the main control unit; wherein, under the control of the main control unit, the signal processing unit receives a video signal through the video receiving unit, and executes a display area interception operation, a gamma reflect After the radiation operation, a brightness and chromaticity correction operation, and display data arrangement operation, generate and output at least one display control signal; and an LED control unit, coupled to the signal processing unit, for controlling according to the at least one display control signal It is electrically connected to an LED display unit of the LED display control box for display control. The LED display control box as described in claim 6, wherein the main control chip further includes: a video transmission unit coupled to a video transmission interface provided on the main board and coupled to the main control unit; a register, coupled to the main control unit; at least one serial communication unit, coupled to the register; and a flash memory, coupled to the main control unit. The LED display control box as described in claim 7, wherein the main control chip further includes: a micro-control unit coupled to the main control unit and a brightness sensor arranged on the main board; wherein, The micro control unit controls the brightness sensor to sense an ambient light brightness, thereby sending an ambient light brightness sensing signal to the main control unit, so that the main control unit generates a display brightness according to the ambient light brightness sensing signal Conditioning signals to the signal processing unit. The LED display control box as described in claim item 7, wherein the serial communication unit is a communication unit selected from the group consisting of an I2C communication unit and an SPI communication unit, and the video receiving interface and the video The transmission interface is selected from the HDMI A video transmission interface in the group consisting of connector, micro connector, Type-C connector, and Lightning connector. An LED display device, characterized by comprising at least one LED display unit and an LED display control box as described in any one of claim 6 to claim 9.

Images