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KR-20260066389-A - APPARATUS AND METHOD FOR CONTROLLING DISPLAY WITH LED CHIPS

KR20260066389AKR 20260066389 AKR20260066389 AKR 20260066389AKR-20260066389-A

Abstract

The present invention relates to a display control device and a method thereof, comprising a display module in which a plurality of LED chips are connected in a horizontal and vertical direction, and a processor connected to one side of the display module, wherein the processor sets an address for the plurality of LED chips, transmits a control signal to at least one of the plurality of LED chips to control the operation of the LED chip, and receives a response signal for the control signal from the LED chip. The processor transmits the control signal to the plurality of LED chips according to a signal transmission rule set based on the connection location of the display module, thereby improving the signal transmission speed, and allows the signal to be transmitted through a plurality of paths so that the signal is transmitted even if a communication error occurs, thereby enabling effective control of the display module.

Inventors

  • 조범철

Assignees

  • 현대모비스 주식회사

Dates

Publication Date
20260512
Application Date
20241104

Claims (10)

  1. A display module in which multiple LED chips are connected in horizontal and vertical directions; and A processor connected to one side of the display module, which sets an address on the plurality of LED chips, transmits a control signal to at least one of the plurality of LED chips to control the operation of the LED chip, and receives a response signal for the control signal from the LED chip; A display control device characterized by the processor transmitting the control signal to the plurality of LED chips according to a signal transmission rule set based on the connection location to the display module.
  2. In Article 1, A display control device characterized in that the plurality of LED chips have communication lines connected to the upper side, lower side, left side, and right side, respectively, and include a vertical address and a horizontal address.
  3. In Article 1, A display control device characterized by the processor transmitting the control signal in the opposite direction of the communication line in which the control signal is received among a plurality of communication lines according to the signal transmission rule, and transmitting the response signal in the opposite direction of the communication line in which the response signal is received.
  4. In Article 1, The above plurality of LED chips receive the same signal multiple times from other connected LED chips, and A display control device characterized by the processor analyzing data received from the plurality of LED chips through a plurality of paths to diagnose a communication error regarding a failure of one of the LED chips or an abnormality in the communication line.
  5. In Article 1, The above processor transmits a control signal for address setting to the plurality of LED chips, A display control device characterized by setting addresses for a plurality of LED chips by setting the vertical address to m when the LED chip transmits a control signal for the address setting through an upper communication line or a lower communication line according to the above signal transmission rule, and increasing the horizontal address to n when the LED chip transmits a control signal for the address setting through a left communication line or a right communication line.
  6. A step in which a processor transmits a control signal to a plurality of LED chips according to a signal transmission rule determined based on the connection position of a display module in which a plurality of LED chips are connected in a horizontal and vertical direction; The step of the processor setting addresses to the plurality of LED chips; The step of the processor transmitting a control signal to at least one of the plurality of LED chips based on the address to control the operation of the LED chip; and A display control method characterized by including the step of the processor receiving a response signal for the control signal from the LED chip.
  7. In Article 6, In the step of setting the above address, A display control method characterized by the processor setting vertical and horizontal addresses for a plurality of LED chips, each having a communication line connected to the upper, lower, left, and right sides, respectively.
  8. In Article 6, In the step of setting the above address, The processor increases the vertical address by m when the LED chip transmits a control signal for address setting through the upper communication line or the lower communication line, and A display control method characterized by setting addresses on a plurality of LED chips by setting the horizontal address to increase by n when transmitting a control signal for the address setting through a left communication line or a right communication line.
  9. In Article 6, A display control method characterized in that, in the step of transmitting the above control signal, the processor transmits the control signal in the opposite direction of the communication line in which the control signal is received among a plurality of communication lines of the LED chip, based on the signal transmission rule determined according to the connection location, and transmits the response signal in the opposite direction of the communication line in which the response signal is received.
  10. In Article 6, A display control method characterized by further including, after the step of receiving the above response signal, the step of the processor analyzing data received from the plurality of LED chips through a plurality of paths to diagnose a communication error regarding a failure of one of the LED chips or an abnormality of the communication line.

Description

Apparatus and Method for Controlling Display with LED Chips The present invention relates to a display control device and a method for controlling a display composed of a plurality of LED modules. Recently, there has been an increasing number of cases where automobiles use semiconductors (LED chips) with built-in RGB LEDs to display or decorate interior functions or statuses. Semiconductors with built-in RGB LEDs can be used as displays when multiple units are connected. Multiple semiconductors with built-in RGB LEDs are connected in series and communicate using the daisy-chain method, which is a type of serial communication. A daisy chain is a method in which multiple devices are connected in succession, such that a first device is connected to a second device and the second device is connected to a third device. However, the daisy-chain method has a problem in that it takes a long time for a signal to reach the semiconductor at the end, as the signal is transmitted through the semiconductors connected in between to control the semiconductor at the end. In addition, in the daisy-chain method, if a fault occurs in the communication line before the signal reaches the last semiconductor, the signal cannot reach the last semiconductor, making it impossible to control the semiconductors after the point where the fault occurred. Accordingly, for displays connecting multiple semiconductors, there is a need for a method to improve signal delay and enable signal transmission to all semiconductors even if an anomaly occurs in the communication line. A related technology is Korean Published Patent Application No. 10-2024-0046105, titled 'Display device, display panel and method of driving the same'. FIG. 1 is a figure showing an LED chip included in a display control device according to one embodiment of the present invention. FIG. 2 is a block diagram briefly illustrating the configuration of a display control device according to one embodiment of the present invention. FIG. 3 is a diagram showing the configuration of an LED chip according to one embodiment of the present invention. FIG. 4 is a diagram showing the signal structure of an LED chip according to one embodiment of the present invention. FIGS. 5A and FIGS. 5B are exemplary diagrams illustrating input and output signals of an LED chip according to one embodiment of the present invention. FIGS. 6a and FIGS. 6b are exemplary diagrams showing the addresses of a plurality of LED chips included in a display module according to one embodiment of the present invention. FIGS. 7A and FIGS. 7B are exemplary diagrams illustrating the address setting process of a display control device according to an embodiment of the present invention. FIGS. 8a and FIGS. 8b are other examples illustrating the address setting process of a display control device according to one embodiment of the present invention. FIGS. 9A and FIGS. 9B are exemplary diagrams illustrating the signal transmission process of a display control device according to an embodiment of the present invention. FIG. 10 is another example illustrating the signal transmission process of a display control device according to one embodiment of the present invention. FIG. 11 is an example diagram illustrating a communication error of a display control device according to one embodiment of the present invention. FIG. 12 is an exemplary diagram illustrating a process for detecting the location of a communication error of a display control device according to one embodiment of the present invention. FIG. 13 is a diagram showing the signal configuration of a fifth LED chip for detecting the location of a communication error in FIG. 12. FIG. 14 is another example illustrating a process for detecting the location of a communication error of a display control device according to one embodiment of the present invention. FIG. 15 is a diagram showing the signal configuration of a fourth LED chip for detecting the location of a communication error in FIG. 14. FIG. 16 is a flowchart illustrating an address setting method of a display control device according to an embodiment of the present invention. FIG. 17 is a flowchart illustrating a control method through signal transmission of a display control device according to an embodiment of the present invention. The present invention will be described below with reference to the attached drawings. In this process, the thickness of lines or the size of components depicted in the drawings may be exaggerated for the sake of clarity and convenience of explanation. Furthermore, the terms described below are defined considering their functions in the present invention, and these may vary depending on the intent or convention of the user or operator. Therefore, the definitions of these terms should be based on the content throughout this specification. FIG. 1 is a figure showing an LED chip included in a display control device according to one embodiment of the present invention. As illust