TW202347290A - LED display driver chip capable of reducing data transmission amount, LED display device, and information processing device wherein a gamma conversion unit is provided in the LED display driver chip to reduce data transmission amount - Google Patents

Abstract

Provided is an LED display driver chip capable of reducing data transmission amount, which is characterized by having: a gamma conversion unit for performing a gamma conversion operation on display data with a first data width to generate display data with a second data width, in which the display data with the second data width is used to generate a driving current to drive an LED module, where the second data width is greater than the first data width. Moreover, the display data with the first data width is provided by a control card, and the control card receives the display data with the first data width from a video source.

Description

LED display driver chips, LED display devices and information processing devices that can reduce data transmission volume

The present invention relates to LED display screens, and in particular to an LED display driving architecture that can appropriately reduce the amount of data transmission.

Please refer to FIG. 1 , which illustrates a block diagram of a conventional LED display device. As shown in Figure 1, the LED display device has a video source 11, a control card 12, at least one LED display driver chip 13 and an LED module 14, wherein the video source 11 is through HDMI (high definition multimedia interface; High-definition multimedia interface) or DP (display port; display port) transmission interface transmits 8~10 bits of display data to the control card 12; the control card 12 has a gamma conversion unit 12a to convert the 8~10 bits The display data is converted into 16-bit display data, and the 16-bit display data is transmitted to each LED display driver chip 13 through a row of lines; and each LED display driver chip 13 is used according to the 16-bit display data. The display data generates a driving current to drive one of the LED sub-blocks of the LED module 14 .

However, since the gamma conversion operation of the gamma conversion unit 12a converts 8-10 bit display data into 16-bit display data, the amount of data transmission between the control card 12 and the LED display driver chip 13 will increase significantly. In addition, in order to meet the frame scanning timing of each LED display driver chip 13 for one LED sub-block, the clock frequency required for data transmission must also be increased. Assuming that the screen size of an LED sub-block is 128*64, the minimum clock frequency must be 128*64*16(bits)*60(Hz)=7.864320MHz. However, increasing the clock frequency will increase the power consumption of the circuit.

In order to solve the above problems, a novel LED display driving architecture is urgently needed in this field.

One purpose of the present invention is to disclose an LED display driver chip that can reduce the amount of data transmission. It can reduce the same LED dots by replacing the gamma conversion unit originally provided in a control card with the LED display driver chip. Count the amount of data required to be transmitted.

Another object of the present invention is to disclose an LED display driver chip that can reduce the amount of data transmission. It can reduce the amount of data transmission by replacing the gamma conversion unit originally provided in a control card with the LED display driver chip. required clock frequency, thereby reducing power consumption.

Another object of the present invention is to disclose an LED display driver chip that can reduce the amount of data transmission. It can achieve an LED by reconfiguring the gamma conversion unit originally provided in a control card in the LED display driver chip. Different LED sub-blocks of the display screen are set with different gamma curve parameters, thereby reducing the number of control cards and making it easier to compensate for the display characteristics of a large LED display screen.

In order to achieve the above purpose, an LED display driver crystal that can reduce the amount of data transmission is proposed, which is characterized by:

A gamma conversion unit for performing a gamma conversion operation on display data with a first data width to generate display data with a second data width, and the display data with the second data width is used to generate a driver The current is used to drive an LED module, wherein the second data width is greater than the first data width.

In one embodiment, the display data with the first data width is provided by a control card.

In one embodiment, the control card receives the display data with the first data width from a video source.

In one embodiment, the control card is not provided with the gamma conversion unit.

In order to achieve the above object, the present invention further proposes an LED display device, which has an LED module and at least one LED display driver chip for driving the LED module. It is characterized in that the LED display driver chip has:

A gamma conversion unit for performing a gamma conversion operation on display data with a first data width to generate display data with a second data width, and the display data with the second data width is used to generate a driver The current is used to drive an LED module, wherein the second data width is greater than the first data width.

In one embodiment, the LED display device further has a control card, and the display data with the first data width is provided by the control card.

In one embodiment, the LED display device further has a video source, and the control card receives the display data with the first data width from the video source.

In a possible embodiment, the LED module may be a sub-millimeter LED module, a micro LED module or a quantum dot LED module.

To achieve the above object, the present invention further proposes an information processing device, a central processing unit and the aforementioned LED display device, wherein the central processing unit is used to communicate with the LED display device.

In possible embodiments, the information processing device may be a smart phone, a portable computer, a vehicle-mounted computer, a wearable electronic device or an advertising billboard.

In order to enable the review committee to further understand the structure, characteristics and purpose of the present invention, drawings and detailed descriptions of preferred embodiments are attached as follows.

Please refer to FIG. 2 , which illustrates a block diagram of an embodiment of the LED display device of the present invention. As shown in FIG. 2 , an LED display device 100 has a video source 110 , a control card 120 , at least one LED display driver chip 130 and an LED module 140 , wherein the LED module 140 can be a one-millimeter light-emitting diode. module, a micro-LED module or a quantum dot LED module.

The video source 110 transmits the display data with the first data width to the control card 120 through a first transmission channel 111, where the first transmission channel 111 can be HDMI (high definition multimedia interface; high definition multimedia interface) or The transmission channel of DP (display port; display port), and the width of the first data can be 8~10 bits.

The control card 120 has a control unit 120a, wherein the control unit 120a is used to receive the display data having the first data width through the first transmission channel 111, and to transmit the display data having the first data width through a second transmission channel 121. The display data is transmitted to the LED display driver chip 130.

The LED display driver chip 130 has a gamma conversion unit 130a for receiving the display data with the first data width through the second transmission channel 121, and performing a gamma conversion operation on the display data with the first data width to generate a signal with the first data width. display data with a second data width, and generate a driving current according to the display data with a second data width to drive one of the LED sub-blocks in the LED module 140, where the second data width may be 16 bits.

Since the gamma conversion unit 130a has been moved from the control card 120 to the LED display driver chip 130, the present invention can greatly reduce the amount of data transmission between the control card 120 and the LED display driver chip 130. In addition, in order to meet the frame scanning timing of each LED display driver chip 130 for one of the LED sub-blocks of the LED module 140, the clock frequency required for data transmission can also be reduced. Assuming that the screen size of an LED sub-block is 128*64, compared with the clock frequency of the existing LED display driver chip in Figure 1 which must be at least 7.864320MHz, the clock frequency of the present invention only needs 128*64*8 (bits )*60(Hz)=3. 932160MHz, and can thus significantly reduce the power consumption of the circuit. On the other hand, if the clock frequency is not reduced, the 7.86MHz clock originally corresponding to the 128*64 screen size will be able to support the 256*64 screen size. In addition, increasing the amount of data transmission means that the usage of the control card 120 can be reduced, thereby simplifying the data transmission architecture.

In addition, it is worth mentioning that usually a large LED display requires thousands, tens of thousands or even millions of LED display driver chips to drive each LED sub-block in the LED display. By converting gamma conversion The unit is placed in the LED display driver chip, and the present invention can set an exclusive gamma conversion unit in the correspondingly configured LED display driver chip according to the actual display characteristics (color, brightness, etc.) of each LED sub-block for display compensation. .

In addition, according to the above description, the present invention further provides an information processing device. Please refer to FIG. 3 , which illustrates a block diagram of an embodiment of the information processing device of the present invention. As shown in Figure 3, an information processing device 200 has a central processing unit 210 and an LED display device 220. The LED display device 220 is implemented by the LED display device 100 shown in Figure 2, and the central processing unit 210 is implemented by to communicate with the LED display device 220 . In addition, the information processing device 200 can be a smart phone, a portable computer, a vehicle-mounted computer, a wearable electronic device or an advertising billboard.

Through the design disclosed above, the present invention has the following advantages: 1. The LED display driver chip of the present invention can reduce the amount of data transmission by replacing the gamma conversion unit originally provided in a control card with the LED display driver chip, thereby reducing the transmission required for the same number of LED points. Amount of data. 2. The LED display driver chip of the present invention that can reduce the amount of data transmission can reduce the clock frequency required for data transmission by replacing the gamma conversion unit originally provided in a control card with the LED display driver chip. Reduce power consumption. 3. The LED display driver chip of the present invention that can reduce the amount of data transmission can change the gamma conversion unit originally provided in a control card into the LED display driver chip to control different LED sub-devices of an LED display screen. Blocks set different gamma curve parameters, thereby reducing the number of control cards and facilitating compensation of display characteristics of a large LED display.

What is disclosed in this case is a preferred embodiment. Any partial changes or modifications derived from the technical ideas of this case and easily inferred by those familiar with the art will not deviate from the scope of the patent rights of this case.

To sum up, regardless of the purpose, means and effects of this case, it shows that it is completely different from the conventional technology, and that the invention is practical first, and indeed meets the patent requirements for inventions. I sincerely ask the review committee to take a clear look and grant the patent as soon as possible for your benefit. Society is a prayer for the Supreme Being.

11:Video source 12:Control card 12a: Gamma conversion unit 13:LED display driver chip 14:LED module 100:LED display device 110:Video source 111: First transmission channel 120:Control card 120a:Control unit 121: Second transmission channel 130:LED display driver chip 130a: Gamma conversion unit 140:LED module 200:Information processing device 210:Central processing unit 220:LED display device

Figure 1 shows a block diagram of a conventional LED display device. FIG. 2 is a block diagram of an embodiment of the LED display device of the present invention. FIG. 3 is a block diagram of an embodiment of the information processing device of the present invention.

100:LED display device

110:Video source

111: First transmission channel

120:Control card

120a:Control unit

121: Second transmission channel

130:LED display driver chip

130a: Gamma conversion unit

140:LED module

Claims (10)

An LED display driver chip that can reduce the amount of data transmission is characterized by: A gamma conversion unit for performing a gamma conversion operation on display data with a first data width to generate display data with a second data width, and the display data with the second data width is used to generate a driver The current is used to drive an LED module, wherein the second data width is greater than the first data width. As described in item 1 of the patent application, the LED display driver chip that can reduce the amount of data transmission is provided, wherein the display data with the first data width is provided by a control card. As described in item 2 of the patent application, the LED display driver chip that can reduce the amount of data transmission is provided, wherein the control card receives the display data with the first data width from a video source. As described in item 2 of the patent application, for an LED display driver chip that can reduce the amount of data transmission, the control card is not equipped with the gamma conversion unit. An LED display device, which has an LED module and at least one LED display driver chip for driving the LED module, characterized in that the LED display driver chip has: A gamma conversion unit for performing a gamma conversion operation on display data with a first data width to generate display data with a second data width, and the display data with the second data width is used to generate a driver The current is used to drive an LED module, wherein the second data width is greater than the first data width. The LED display device described in item 4 of the patent application further has a control card, and the display data with the first data width is provided by the control card. The LED display device described in Item 5 of the patent application further has a video source, and the control card receives the display data with the first data width from the video source. The LED display device as described in item 4 of the patent application, wherein the LED module is composed of a sub-millimeter light-emitting diode module, a micro-light-emitting diode module and a quantum dot light-emitting diode module. A display module selected by the module. An information processing device having a central processing unit and the LED display device as described in any one of items 4 to 8 of the patent application, wherein the central processing unit is used to communicate with the LED display device. The information processing device described in Item 9 of the patent application is one selected from the group consisting of a smart phone, a portable computer, a vehicle-mounted computer, a wearable electronic device and an advertising billboard. device.

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