KR20230083487A - Fault robust display driving method - Google Patents

Abstract

A display driving method according to the present invention includes an address designation step of providing a setting code to a plurality of unit light emitting modules to designate addresses, a light emitting data field corresponding to the output of the unit light emitting module, and an address corresponding to the assigned address. and an outputting step of receiving a packet including the field and outputting corresponding light.

Description

Fault-tolerant display driving method {FAULT ROBUST DISPLAY DRIVING METHOD}

The present invention relates to a display driving method. More particularly, the present invention relates to a method for driving a display that is robust against failures in which operation of the remaining unit light emitting modules is guaranteed even when a failure occurs in any one unit light emitting module connected to a host controller.

Recently, in the implementation of commercial outdoor and indoor electronic signboards, there is a tendency to enlarge the display area of the electronic signboard and increase the resolution of the display. In addition, there is a trend of adopting LED as a light emitting device in order to implement high luminance, high contrast ratio and good color reproducibility.

The LED display can improve image quality by increasing the sharpness of the pixel display by forming densely spaced intervals between individual LEDs, so that the LED display can be implemented more efficiently in terms of physical size and cost.

In a display using an LED, it is common to connect unit light emitting modules in a cascade, and sequentially receive and transmit light information to be output by the unit light emitting modules. The cascade connection method has advantages in terms of data transmission and maintenance for light output from connected unit light emitting modules.

However, the LED display according to the prior art has a disadvantage in that if any one of the unit light emitting modules (slaves) connected in a cascade structure fails, all subsequent light emitting modules do not operate.

In particular, when such a failure occurs in a unit light emitting module close to the cascade controller (host), all subsequent unit light emitting modules do not operate.

The present invention is to solve the above-mentioned difficulties of the prior art, and it is an object of the present invention to provide an LED display in which subsequent unit light emitting modules can operate normally even if a failure occurs in any one unit light emitting module.

The technical problems to be achieved by the present invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description of the present invention. .

A display driving method according to the present invention includes an address designation step of providing a setting code to a plurality of unit light emitting modules to designate addresses, a light emitting data field corresponding to the output of the unit light emitting module, and an address corresponding to the assigned address. and an outputting step of receiving a packet including the field and outputting corresponding light.

According to one aspect of the present invention, the address designation step may include outputting a setting code including an allocation field and an address data field through the plurality of unit light emitting modules connected in a cascade by a host controller; and storing the corresponding address in the address data field by the corresponding unit light emitting module.

According to one aspect of the present invention, after the step of outputting the setting code, the plurality of unit light emitting modules that do not correspond to the allocation field subtract the value of the allocation field by a predetermined value so that the subsequent unit light emitting module The step of outputting is further included.

According to one aspect of the present invention, the unit light emitting module provided with the predetermined assigned field value stores an address corresponding to the address data field.

According to one aspect of the present invention, each of the plurality of unit light emitting modules further includes a non-volatile memory, and the step of storing the address is stored in the non-volatile memory.

According to one aspect of the present invention, the setting code further comprises a register address field corresponding to the address of the non-volatile memory in which the address is stored, and the step of storing the address comprises the register address field of the non-volatile memory. stored at the corresponding address.

According to one aspect of the present invention, the cascade connection of the plurality of unit light emitting modules is released after the address designation step.

According to one aspect of the present invention, the packet further includes a start field designating a start of the packet.

According to one aspect of the present invention, the plurality of unit light emitting modules include a first input terminal and a second input terminal electrically separated from the first input terminal, and the address code is input to the first input terminal. and the packet is input to the second input terminal.

According to one aspect of the present invention, the packet and the address code are transmitted through separate paths.

According to the present invention, even if a failure occurs in any one unit light emitting module connected to the host controller, the operation of the remaining unit light emitting modules is guaranteed.

The effects of the present invention are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

1 is a flowchart showing an outline of a display driving method according to the present invention according to the present invention.
2 is a block diagram showing the outline of a display device 10 according to the present invention.
FIG. 3 is a diagram showing an outline of a setting code (SET_UP) output by the host controller 200. Referring to FIG.
FIG. 4 is a diagram for explaining a process of performing the address designation step (S10) for the unit light emitting modules 200a, 200b, 200c, ..., 200n using the setting code (SET_UP).
5 is a diagram schematically illustrating a packet Pa output from the host controller 100. Referring to FIG.
6 is a diagram illustrating a process in which the host controller 100 outputs a packet Pa and provides light emitting data DATA to a target unit light emitting module 200d.
FIG. 7 is a diagram illustrating control of a plurality of unit light emitting modules connected in cascade with one host controller 100 .

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in this specification and claims should not be construed as being limited to the usual or dictionary meaning, and the inventor appropriately uses the concept of the term in order to explain his/her invention in the best way. It should be interpreted as a meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined. Therefore, the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention, so various alternatives can be made at the time of this application. It should be understood that there may be equivalents and variations.

1 is a flowchart showing an outline of a display driving method according to the present invention according to the present invention.

Referring to FIG. 1, a display driving method according to the present invention includes an address designation step (S100) of designating addresses by providing address codes to a plurality of unit light emitting modules, and a light emitting data field corresponding to the output of the unit light emitting modules. and an output step (S200) of receiving a packet including an address field corresponding to the assigned address and outputting a corresponding light.

2 is a block diagram showing the outline of a display device 10 according to the present invention.

Referring to FIG. 2 , the display device 10 includes a host controller 100 and a plurality of unit light emitting modules 200a, 200b, 200c, ..., 200n. The illustrated embodiment shows a state in which a plurality of unit light emitting modules 200a, 200b, 200c, ..., 200n are cascade-connected to each other through a data input port (DIN) and a data out (DOUT) port.

However, this is an embodiment, and after the address designation step (S100) for the unit light emitting modules (200a, 200b, 200c, ..., 200n) is completed, the data input port (DIN) and the data out (DOUT) port The states connected to each other in cascade can be released through In an embodiment, the unit light emitting modules 200a, 200b, 200c, ..., 200n may include a non-volatile memory (not shown) that can be accessed through an address as will be described later.

FIG. 3 is a diagram showing the outline of a set code (SET_UP) output by the host controller 200, and FIG. 4 is a view showing unit light emitting modules (200a, 200b, 200c, ..., 200n) using the set code (SET_UP). ) It is a diagram for explaining the process of performing the address designation step (S10).

Referring to FIG. 3 , the setting code SET_UP includes an assignment field ASSIGN and an address data field ADDRESS DATA. As an embodiment, the setting code SET_UP may further include a register address field Reg, ADDRESS. In the embodiment illustrated in FIG. 3, the assignment field (ASSIGN) is 6 bits, the address data field (ADDRESS DATA) and the register address fields (Reg, ADDRESS) illustrate that each is 8 bits, but this is only an embodiment, unit It may be modified and implemented according to the number of light emitting modules 200a, 200b, 200c, ..., 200n, the configuration of registers included in each unit light emitting module, and the like.

4(a) is a diagram illustrating a case where the host controller 100 assigns an address to the unit light emitting module 200c. Referring to FIG. 4(a), the host controller 100 outputs a setup code (SET_UP) including an assignment field (ASSIGN) having a value of 0x02. The setting code SET_UP is provided to the data input port DIN of the unit light emitting module 200a. The unit light emitting module 200a to which the setting code SET_UP is input compares the assignment field ASSIGN included in the setting code SET_UP with a pre-specified and stored value. In one embodiment, the pre-specified value may be 0.

As a result of the comparison, if the value of the assignment field (ASSIGN) is different from the pre-specified and stored value, the unit light emitting module 200a decreases the value of the assignment field (ASSIGN) by 1, which is the pre-specified value, and outputs the value to the data output port (DOUT). do. The subsequent unit light emitting module 200b receives the setting code SET_UP output from the unit light emitting module 200a, and compares the value of the assignment field ASSIGN included in the setting code SET_UP with a previously specified and stored value. and, if it is different from the previously designated and stored value, the value of the assignment field (ASSIGN) is reduced by 1 and output to the data output port (DOUT).

The unit light emitting module 200c receives the setting code SET_UP from the previous unit light emitting module 200b. Since the value of the assignment field (ASSIGN) is 0, it coincides with a pre-designated and stored value, so the unit light emitting module 200c is assigned to the address of the non-volatile memory (not shown) designated as the register address field (Reg, ADDRESS) as an address data field. Saves the value designated as (ADDRESS DATA). A value stored in a nonvolatile memory (not shown) functions as an address of the unit light emitting module 200c.

In the embodiment illustrated in FIG. 4( b ), the host controller 100 outputs a setup code (SET_UP) including an assignment field (ASSIGN) having a value of 0x05. Through the processes described above, the value of the assignment field (ASSIGN) included in the setting code (SET_UP) is reduced by 1 while passing through the unit light emitting modules (200a, 200b, ...) and transmitted to subsequent unit light emitting modules.

The unit light emitting module 200f to which the setting code (SET_UP) in which the value of the assignment field (ASSIGN) is 0 coincides with the predetermined value, so that the value of the assignment field (ASSIGN) is nonvolatile designated as the register address field (Reg, ADDRESS). A value specified as an address data field (ADDRESS DATA) is stored in an address of a memory (not shown).

When the address designation step (S10) for the unit light emitting modules 200a, 200b, ... is completed through the above steps, the data input ports DIN of the light emitting modules 200a, 200b, ... Cascade connection can be released by disconnecting the connection between the data output ports (DOUT).

5 to 7 The output step (S200) will be described with reference.

5 is a diagram schematically illustrating a packet Pa output from the host controller 100. Referring to FIG. Referring to FIG. 5 , the packet Pa may include a 4-bit address field ADDRESS and a 10-bit light emitting data field DATA. In one embodiment, the number of bits of the address field and the light emitting data field is only an embodiment, and the number of bits of each field may be changed according to an embodiment.

As an embodiment, an address designated as the address field ADDRESS may correspond to an address designated for each unit light emitting module 200a, 200b, 200c, ..., 200f in the address designation step S100. The light emitting data field DATA corresponds to light output from the unit light emitting modules 200a, 200b, 200c, ..., 200f. For example, the light emitting data field DATA may be data for setting the color, brightness, and output time of light output from the unit light emitting modules 200a, 200b, 200c, ..., 200f.

In addition, the packet Pa may further include a start field corresponding to a period of a plurality of clocks. For example, when a plurality of packets (Pa) are transmitted, the start field enables the packets (Pa) to be distinguished from each other. For example, the start field may be maintained as a predetermined bit such as 0 or 1 for a plurality of clock cycles.

6 is a diagram illustrating a process in which the host controller 100 outputs a packet Pa and provides light emitting data DATA to a target unit light emitting module 200d.

Referring to FIG. 6 , an address assigned to each unit light emitting module is displayed as a red binary number. The host controller 100 designates 0011, which is the address of the target unit light emitting module 200d, as the address field, writes and transmits data to be provided, 0101 0100 01, in the data field.

Each of the unit light emitting modules 200a, 200b, 200c, ..., 200f further includes a packet input port DA, and packets Pa are transmitted through the packet input port DA. Each unit light emitting module (200a, 200b, 200c, ..., 200f) receives the packet (Pa) provided through the packet input port (DA), and if the address field in the packet (Pa) matches the designated address, the data field Receives the data of and performs an operation corresponding to the data.

FIG. 7 is a diagram illustrating control of a plurality of unit light emitting modules connected in cascade with one host controller 100 .

Referring to FIG. 7 , n * k unit light emitting modules may be arranged in an array form, and the connection between the data input port DIN and the data output port DOUT of each unit light emitting module located in the same row is as described above. As noted above, it can be removed after the casting designation step.

Packet input ports DAs of a plurality of unit light emitting modules connected in a row are connected to each other and connected to the host controller 100 . Accordingly, the packet Pa provided by the host controller 100 can be received and controlled.

7 shows that the host controller 100 includes unit light emitting modules 200c and 1 in a first row, unit light emitting modules 200n-1 and 2 in a second row, unit light emitting modules 200b and 3 in a third row, and A state in which the packet Pa is provided to the unit light emitting modules 200a and k in the kth row is exemplified. As illustrated, the host controller 100 may control the unit light emitting modules by assigning addresses to the plurality of unit light emitting modules and providing packets to the unit light emitting modules corresponding to the respective addresses.

According to the present invention, a path through which a set code (SET_UP) designating an address is transmitted and a path through which a control packet (Pa) is transmitted are separated from each other. Also, the setting code (SET_UP) and the control packet (Pa) are input to different ports of the unit light emitting module. Accordingly, there is an advantage in that operation of the remaining unit light emitting modules is guaranteed even when a failure occurs in any one unit light emitting module.

Although it has been described with reference to the embodiments shown in the drawings to aid understanding of the present invention, this is an embodiment for implementation and is only exemplary, and those having ordinary knowledge in the field can make various modifications and equivalents therefrom. It will be appreciated that other embodiments are possible. Therefore, the true technical scope of protection of the present invention will be defined by the appended claims.

100: host controller
200: unit light emitting module

Claims (10)

an addressing step of designating addresses by providing setting codes to a plurality of unit light emitting modules;
and an output step of receiving a packet including a light emitting data field corresponding to the output of the unit light emitting module and an address field corresponding to the assigned address and outputting corresponding light.
According to claim 1,
In the addressing step,
outputting, by a host controller, a setting code including an assignment field and an address data field through the plurality of unit light emitting modules connected in cascade;
and storing an address corresponding to the address data field in the unit light emitting module corresponding to the allocation field.
According to claim 2,
After the step of outputting the setting code
and subtracting, from the plurality of unit light emitting modules that do not correspond to the allocation field, a value of the allocation field by a predetermined value and outputting the subtracted value to a subsequent unit light emitting module.
According to claim 3,
The method of driving a display device in which the unit light emitting module provided with the predetermined allocation field value stores an address corresponding to the address data field.
According to claim 2,
Each of the plurality of unit light emitting modules,
further comprising a non-volatile memory;
The storing of the address is stored in the non-volatile memory.
According to claim 5,
The setup code is
Further comprising a register address field corresponding to the address of the non-volatile memory in which the address is stored;
In the step of storing the address, the address corresponding to the register address field of the non-volatile memory is stored.
According to claim 2,
After the addressing step, the plurality of unit light emitting modules
A method of driving a display device in which cascade connection is released.
According to claim 1,
The packet is
and a start field designating a start of the packet.
According to claim 1,
The plurality of unit light emitting modules
a first input terminal and a second input terminal electrically separated from the first input terminal;
the address code is input to the first input terminal;
The method of claim 1 , wherein the packet is input to the second input terminal.
According to claim 1,
The method of driving a display device in which the packet and the address code are transmitted through separate paths.

Images