KR200301822Y1 - Electric bulletin board system for sensing display error - Google Patents

Abstract

The present invention makes it easy to accurately detect the position of the display element that is in error even when there is a display error and a display error on a display panel installed at a remote location. In particular, the structure is simple to detect a display error state at a low cost. Relates to an electronic sign system.

An electronic display system for detecting a display error state includes a display-related system for displaying an image or a character on a display panel and a plurality of display element modules having a plurality of display elements for partitioning the display panel and displaying the image or character. A display error processing system having a plurality of display device driver integrated circuits (ICs) correspondingly connected to the display elements in the display device modules, wherein the display error for the display panel is passed through the display device driver integrated circuits. It is characterized in that the structure of the display and the display device having a display error and the display device having the same and the display device module having the same, so that the system operation unit remote from the display panel can be detected accurately and easily.

Description

ELECTRIC BULLETIN BOARD SYSTEM FOR SENSING DISPLAY ERROR}

The present invention relates to an electronic signboard system, and in particular, it is possible to easily and accurately detect the position of the display error of the display error even when there is a display error and a display error in a display panel installed at a remote location. The present invention relates to an electronic display system that detects inexpensive display error.

In general, an electronic display system having a display panel for displaying display-related data on an image or a character that is installed and received outdoors has a display function and diagnoses when a display element constituting the display panel malfunctions as a display error. Since there was no function, it was true that the display-related data had to go directly to the display panel installed at a remote location from the operating unit which processes the display-related data on the display panel and directly check the display state of the display panel.

In order to solve this problem, as described in Patent Registration No. 92986 (Patent Registration Publication No. 1995-6578), a current conducting wire is installed in a power supply line of a display device which is already installed, through which current flows. A method designated as "Fault self diagnosis circuit in an electro-optical display device" which induces a voltage by magnetic flux generated around and detects the current, and detects the malfunction of the display element, and Patent Registration No. 220104 As described in (Patent No. 1999-220104), there is provided a differential amplifier (OP AMP) connected to an output terminal in a pixel driving circuit for driving a dot pixel of a predetermined dot matrix indicator, and the predetermined By comparing the reference voltage (Vref) and the voltage caused by the leakage current from the output terminal in the unlit state to check whether the pixel malfunctions. A display module for an electronic display panel and a method for checking an operating state of an electronic display panel using the same are known.

However, these known methods have the disadvantage that the system circuits configured to implement them are not only complicated but also expensive in manufacturing.

Therefore, the present invention has been devised to solve such a problem, and an object of the present invention is to easily detect the location of a display error display device on a display panel installed at a remote location and even when a display error occurs. In particular, it is to provide an electronic signboard system that detects the display error state of low cost because of its simple structure.

1 is an overall block diagram schematically showing a sign board system for detecting a display error state according to the present invention;

2 is a block diagram showing a display error processing system in a display system for detecting a display error state according to the present invention;

3 is a circuit diagram illustrating a display device driver integrated circuit in an electronic display system for detecting a display error state according to the present invention;

4 is a flowchart illustrating a display error processing flow in an electronic display system according to the present invention;

5A and 5B are exemplary views showing display error characters in the display panel of the electronic display system according to the present invention.

<Description of the symbols for the main parts of the drawings>

1: Display board system of the present invention 3: Display panel

5: operating personal computer 7: controller

9: Display element module 10: Display element (LED)

11: microprocessor (MPU) 13: image RAM

15: scanner 19: display device driver integrated circuit

50: display error processing system 51: three-phase buffer

53: one-chip central processing unit 55: module address selector

57: one-chip CPU address selector 59: multi-drop transceiver

61: error data RAM

The display board system for detecting a display error state of the present invention for achieving the above object is a display panel system having a display panel for displaying display-related data for the image or text received and installed outdoors, the display panel An operating personal computer (PC) for obtaining display related information to be displayed from various input devices, analyzing, editing, and processing the obtained information, and outputting the processed data signal in accordance with a program; The display related data signal outputted from the operating personal computer is stored and stored in an image RAM connected thereto, and the display related data stored in the image RAM is read out and arithmetic processed according to a program, and the display on the display panel is performed. A microprocessor (MPU) for collecting and reading display error data transmitted through the error processing system to calculate the position of the display error site with respect to the display panel; A scanner for distributing and scanning the data signal to properly display the display related data signal output from the microprocessor on the display panel; And a plurality of display elements for displaying the display-related data signals output from the scanner at a remote location from the scanner, wherein the display panel has a partitioned structure, and current values of output terminals corresponding to the plurality of display elements applied thereto. And a plurality of display element modules having a display element driver integrated circuit (IC) for reading the current value of the reference current IREF and transmitting the display error state of the display elements to the display error processing system. It is done.

On the other hand, the display error processing system transmits a display error signal that is output due to a difference between the display elements of the display element driver integrated circuit of the display element module and the current value from the associated output terminal and the set current value of the reference current. A module address selector in which the position address of each of the display element driver integrated circuits and their display element modules is specified on the display panel on the basis of a three-phase buffer for the three-phase buffer and a display error signal outputted from the three-phase buffer. A one-chip central processing unit for reading out the position data of the display element module in which the display-error display elements exist and outputting the processed display error data, and storing and storing the error data output from the one-chip central processing unit Installed in the controller and connected to the microprocessor Preferably, the microprocessor is configured to include a data RAM, and the microprocessor repeatedly reads and displays the display error data stored in the error data RAM with the display related data signal output from the operating personal computer. It is desirable to track the location of the and the error data processed by the microprocessor to be displayed on the monitor of the operating personal computer.

In addition, the one-chip central processing unit is installed in the display panel by the number of the display element module or by grouping the plurality of display element modules, and the plurality of one-chip central processing units respectively specify their positions. It is further connected to a data-formed one-chip CPU address selector, wherein the display error data from the plurality of one-chip CPUs further includes position data of the one-chip CPU from the one-chip CPU address selectors. It is preferable to output the error data RAM through a multidrop transceiver connected integrally with the one-chip central processing units.

These and other features will be apparent from the following description with reference to the accompanying drawings.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention in detail as follows.

1 is an overall block diagram schematically showing a sign board system for detecting a display error condition according to the present invention, Figure 2 is a block diagram showing a display error processing system in the sign board system for detecting a display error condition according to the present invention, 3 is a circuit diagram illustrating a display device driver integrated circuit in a display system for detecting a display error state according to the present invention.

As shown in the drawings, a display board system for detecting a display error state according to the present invention (hereinafter referred to as a "light board system"), that is, a display panel for displaying display-related data on the image or text installed and received outdoors ( The electric signboard system 1 having 3) recalls an operating personal computer 5 for acquiring and processing display related information to be displayed on the display panel 3, and the display related data output from the operating personal computer 5; A display device composed of a dot matrix structure for displaying a controller 7 for processing to display the display panel 3 suitably on the display panel 3 and for displaying display-related data output from the controller 7 as an image or a character on the display panel 3. The display device module 9 is divided into a display element module 9 provided with 10 and divided into a plurality of display panels 3.

More specifically, the operating personal computer (PC) 5 acquires the display related information to be displayed on the display panel 3 from various input devices such as a subtitle device, a keyboard, a CD player, a DVD player, and the like. It analyzes, edits, and processes the display-related information and outputs the processed data signal according to the program. In addition, this operating personal computer 5 may be further connected with a host computer for processing data processing requests of the entire system.

The microprocessor (MPU) 11 in the controller 7 stores and stores the display related data signal output from the operating personal computer 5 in an image RAM 13, which is a storage device connected thereto. According to the program, the display-related data stored in the image RAM 13 is read out and arithmetic processed. In addition, the microprocessor 11 collects and reads display error data transmitted through the display error processing system 50 described below for the display panel 3 to determine the position of the display error site with respect to the display panel 3. Perform the role of calculating.

The scanner 15 distributes and scans the data signal so that the display-related data signal output from the microprocessor 11 is appropriately displayed on the display panel 3.

The display panel 3 is composed of a plurality of display element modules 9 partitioning it as described above (in the drawing, only one display element module is displayed for the display panel 3 for convenience of description). The display device modules 9 include a plurality of display devices 10, that is, light emitting diodes (LEDs), and the display devices 10 are correspondingly connected display device driver integrated circuits (LED driver ICs) 19. It serves to display the display-related data signal output from the scanner 15 through the (). The display element modules 9 constituting the display panel 3 are installed remotely from the scanner 15. Since the display panel 3 is structured through the plurality of display element modules 9, the display element module 9 having the display element 10 having the display error in the case of a display error of the display panel 3 is provided. By replacing only the normal display of the display panel 3 can be realized. Therefore, the troubleshooting of the display panel 3 can be easily performed.

In addition, the display device driver ICs 19 detect a display error of the display devices 10 and output the display error data. That is, whether or not display errors of the display elements 10 are read by reading the current values of the output terminals 21a to 21p and the current values of the reference current IREF 23 corresponding to the plurality of display elements 10 applied. The display error signal is output to the display error processing system 50. Such display device driver integrated circuit 19 is a well-known technique for detecting errors in various systems.

The circuit structure of this display element driver integrated circuit 19 is as shown in FIG. In brief, the display element driver integrated circuit 19 is configured to input serial data in synchronization with a clock signal and to output 16 output terminals (OUT PUTs) 21a to 21p. The output terminals 21a to 21p are connected to the display elements 10 through the resistors R1 to R16 as C-MOS. Rated current flows through the resistors R1 through R16 to the display elements 10, whereby the display of the display elements 10 is made constant. The display element driver integrated circuit 19 has a reference current (IREF) 23 on the circuit, and the reference current value 23 is set in the reference current 23 to detect display errors of the display elements 10. have.

Therefore, the display-related data signals output from the scanner 15 are respectively output from the output terminals 21a to 21p of the display element module 9 via the display element driver integrated circuits 19 and then output thereof. In each of the display elements 10 correspondingly connected to the terminals 21a to 21p, a display such as an image or a character is displayed. Meanwhile, the error detection terminal (X-DOWN) 25 shown in the figure serves to output the display error signal to the display error processing system 50. The operation of the display device driver integrated circuit 19 will be described later.

As described above, when the display system 1 according to the present invention is implemented, the display system 1 is transmitted through each display device driver integrated circuit 19 in the display device module 9 as described above. A display error processing system 50 for processing display error signals is provided.

The display error processing system 50 obtains a three-phase buffer (3-STATE BUFFER) 51. The three-phase buffer 51 is a medium for smoothly transmitting display error signals outputted from the display element driver integrated circuits 19. The three-phase buffer 51 may be installed alone in accordance with the display device modules 9 and may be installed in accordance with the number of the display device driver integrated circuits 19 in the display device module 9, but the incompatibility of the circuit may be reduced. For this purpose, it is preferable to be installed alone corresponding to the number of the display device modules 9.

One chip central processing unit (ONE CHIP CPU) 53 processes the display error signal output from the three-phase buffer 51 and outputs the processed display error data to the microprocessor 11 as a signal. do. The output here includes position data of the display element driver integrated circuit 19 having the display element 10 and the display element module 9 having the integrated circuit 19 causing the display error signal; have. This positional data is obtained from the module address selector 55 installed in the display element module 9 connected to the one-chip central processing unit 53.

In this module address selector 55, the position address of the display element module 9 with respect to the display panel 3 is designated data. The module address selector 55 displays the address of the display element module 9 in the selector 55 alone according to the number of the display element modules 9 with respect to the display panel 3. It may be provided in the element module 9, or alternatively, all position addresses of the module address selectors 55 constituting the display panel 3 may be installed alone in the display panel 3 while specifying and storing specified address data. In the latter case, the display element module 9 itself has a plurality of the display element driver integrated circuits 19 and the selector 55 is located at the position of the integrated circuit 19 as described below. Since the address is also stored, when installed alone on the display panel 3, it may be somewhat slower to search for the location addresses of the display element module 9 and the plurality of integrated circuits 19 installed therein. For this reason, it is preferable that this module address selector 55 is provided in accordance with the display element module 9, but this is not necessarily the most suitable circuit configuration.

As described above, in this module address selector 55, the position address for the display element driver integrated circuit 19 is also designated data. The selector 55 specifies the location addresses through a decoder and a dual in-line package switch, and the one-chip central processing unit 53 uses the selector 55 to select the integrated circuit. (19) and the position of the display element module 9 in which it is installed can be accurately read.

Therefore, the one-chip central processing unit 53 is the display element driver integrated circuit 19 and its display element module 9 in the display panel 3 on the basis of the display error signal output from the three-phase buffer 51. Reads and processes the position data of the display element module 9 in which the display error display elements 10 exist, from the module address selector 55, each of which designates the position address of the microprocessor. We can output to (11).

On the other hand, the one-chip central processing unit 53 may be installed according to the number of the display device modules 9 on the display panel 3, whereas the one-chip central processing unit 53 binds a plurality of the display device modules 9 to each group. It is more preferable to install. This is because the address where the one-chip CPU 53 can occur is limited. That is, if the one-chip central processing unit 53 has an 8-bit capacity, only 256 display element driver integrated circuits 19 can be addressed. Therefore, the one-chip central processing unit 53 is preferably provided for each group of the display element modules 9 bound within the range not exceeding the capacity, if not the number of the display element modules 9. .

As described above, when a plurality of one-chip central processing units 53 are provided for the display panel 3, the one-chip central processing unit in the display panel 3 may be used to more accurately detect a display error portion of the display panel 3. It is necessary to know the location address for the (53) correctly. Therefore, in this system, the one-chip CPU address selector 57 plays this role. That is, in this one chip central processing unit address selector 57, the position addresses of the one chip central processing units 53 with respect to the display panel 3 are designated data. Accordingly, the display error data output from the one-chip CPUs 53 further includes a position address of the one-chip CPU 53 itself, that is, its position data read from the selector 57. Is sent to the microprocessor 11.

In this way, when a plurality of one-chip central processing units 53 are provided for the display panel 3, display error data output independently from the one-chip central processing units 53 is used for simplicity and cost reduction of the system circuit. The multi-drop transceiver 59 integrated with these one-chip CPUs 53 is transmitted to the microprocessor 11 installed remotely therefrom.

On the other hand, in the controller 7 described above, it is further provided with an error data RAM 61 which is a storage device connected to the microprocessor 11. The error data RAM 61 serves to store and store the error data processed by the microprocessor 11. Therefore, the microprocessor 11 repeatedly compares and reads the display error data stored in the error data RAM 61 with the display-related data signal, thereby causing display error and display device driver integrated circuit. (19) and the position of the display element module 9 can be accurately tracked.

In this way, the calculation data related to the display element 10 for the display error in the microprocessor 11 can be visually viewed through the monitor of the operating personal computer 5.

Hereinafter, a method of operating the electric signboard system 1 according to the present invention having the structure as described above will be described with reference to FIGS. 4 and 5. In particular, the present display board system 1 will be described based on the display error processing system.

4 is a flowchart showing a display error processing flow in the sign board system 1 according to the present invention, and FIGS. 5A and 5B are exemplary views showing display error characters in the display panel of the sign system 1 according to the present invention.

In the display panel 3 illustrated in FIG. 5A, the letter “A” is displayed by the display-related data signal relating to the character output from the operating personal computer 5. In this figure, the mark of the black point forming the character indicates the normal display, i.e., the normally lighted display element 10 (hereinafter referred to as the "normal display element"), and the X mark in the round circle indicates that the display error has occurred. The display element 10 which has not emitted light is shown (hereinafter referred to as "error display element"). Here, in order to distinguish the display elements 10 related to display errors, normal display elements are denoted by "10a" and error display elements are denoted by "10b".

Based on this, after the step 100 shown in FIG. 5A and initialized as described above, as shown in the drawing, the display element 10b corresponding to any part of the display panel 3 for displaying characters is When a display error has occurred, the display element driver integrated circuit 19 having this error display element 10b outputs the detected display error signal to the three-phase buffer 51. The display error signal is output from the error detection terminal 25 on the integrated circuit 19, and the display error signal is a difference between the current value of the output terminals 21a to 21p and the set current value of the reference current 23 to be applied. Is caused by That is, since the normal display element 10a is in a state of matching with the set current value of the reference current 23, no display error signal is generated. However, the error display element 10b has a variable current value to set the reference current 23. Since it is in a state different from the current value, a display error signal is generated from the error detection terminal 25. Therefore, this process becomes steps 101 and 103 relating to display error detection and whether the error is present. That is, if it is determined in step 103 that the error display device 10b does not exist through the above-described process, it is fed back to step 101 to continuously detect whether the error display device 10b exists.

The error indication signal generated as described above and output to the three-phase buffer 51 is transmitted to the corresponding one-chip central processing unit 53. The one-chip central processing unit 53 is an integrated circuit 19 having the error display element 10b from the module address selector 55 and a position of the display element module 9 having the integrated circuit 19. The position data for the address, and the position data for its own position address from the one-chip CPU address selector 57 and processed and the processed display error data being remoted through the multidrop transceiver 59; The microprocessor 11 outputs the result.

The microprocessor 11 collects the display error data transmitted from the one-chip central processing unit 53 and stores it in the error data RAM 61 as described above.

On the other hand, on the display panel 3 illustrated in Fig. 5B, the letter " I " is displayed by the display related data signal relating to other characters outputted from the operating personal computer 5. In this figure, the mark of the black point indicates the normal display element 10a, and the mark of the two-ply round circle indicates the letter "I" at the same position as the display error area expressed when the letter "A" is displayed. In addition, the display error site expressed during the operation is shown. Hereinafter, the display error site is referred to as a redundant error display device 10c.

As described above, when information data on the position of the error display element 10b is collected and stored through the letter "a" displayed on the display panel 3, the letter "i" is displayed on the display panel 3 continuously. As a result, information data on the position of the new error display element 10c is collected and stored through the path as described above. This process corresponds to step 105, and the collection of the information data for this display error is continued through the other characters displayed on the display panel 3 until the predetermined period set in step 106 is reached. Proceed with feedback.

As described above, the microprocessor 11 stores the information data of the display error region for the display panel 3 accumulated in the error data RAM 61 because the above-described process continues continuously for a predetermined period of time. By reading, the position of the display error site with respect to the display panel 3 is calculated as in step 109. The process of calculating the position of the display error region is continuously made while feeding back for a predetermined period of time by the step 111. As a result, the microprocessor 11 follows the program to position the display error region with respect to the display panel 3. Can be read accurately. For example, by continuously displaying the letters "a" and "b" shown in FIGS. 5A and 5B on the display panel 3, the position of the duplicated error display element 10c that has been expressed can be accurately calculated.

This process is automatically executed by a program and the position of the display error site on the display panel 3 calculated by the microprocessor 11, that is, the position of the redundant error display element 10c, is determined by the operating personal computer 5. Is displayed on the monitor for viewing by the operator (step 113).

As can be seen from this, the operator who operates the electronic display board system 1 can display the display panel 3 through the information displayed from the operating personal computer 5 in an operation unit remote from the display panel 3 through the above-described process. It is possible to pinpoint the location of the display error site. Therefore, the operator can easily replace only the display element module 9 corresponding to the display error site to implement the normal display of the display panel 3. In particular, when the display panel 3 displays an image, the microprocessor 3 may detect a position of a display error site of the display panel 3 by installing a separate model suitable for the display.

On the other hand, the above is described on the assumption that there is a display error site on the display panel 3, it should be understood that the display error on the display panel 3 is continuously supplied to the operator through the above-described process. That is, even when the display panel 3 is normally displayed, data on the display panel 3 may be continuously provided to the operator through the above-described process.

As described above, the electronic sign system 1 that detects a display error state of the display panel 3 according to the present invention can greatly reduce its manufacturing cost because of its simple structure.

As described above, according to the present invention, it is possible to easily and accurately detect the display error of the display panel installed at a remote location and the position of the display error display device even when a display error occurs through the above structure. It is effective in reducing manufacturing costs.

Claims (3)

An electronic display system having a display panel for displaying display-related data on an image or a character, etc., installed and received outdoors, An operating personal computer (PC) for obtaining display related information to be displayed on the display panel from various input devices, analyzing, editing, and processing the obtained information, and outputting the processed data signal according to a program; The display related data signal outputted from the operating personal computer is stored and stored in an image RAM connected thereto, and the display related data stored in the image RAM is read out and arithmetic processed according to a program, and the display on the display panel is performed. A microprocessor (MPU) for collecting and reading display error data transmitted through the error processing system to calculate the position of the display error site with respect to the display panel; A scanner for distributing and scanning the data signal to properly display the display related data signal output from the microprocessor on the display panel; And A plurality of display elements for displaying the display-related data signals output from the scanner at a remote location from the scanner, the display panel having a partitioned structure, and a current value of an output terminal corresponding to the plurality of display elements applied thereto; And a plurality of display element modules having a display element driver integrated circuit (IC) for reading the current value of the reference current IREF and transmitting the display error state of the display elements to the display error processing system. Display system to detect the display error condition. The display error processing system according to claim 1, wherein the display error processing system outputs a display error due to a difference between a display element, which is displayed in a display element driver integrated circuit of the display element module, and a current value from an associated output terminal and a set current value of a reference current. Designate and specify the position address of the display element driver integrated circuit and its display element module on the display panel based on a three-phase buffer for transmitting a signal and a display error signal outputted from the three-phase buffer. A one-chip central processing unit for reading out the position data of the display element module in which the display-error display elements exist from one module address selector and outputting the processed display error data, and the error output from the one-chip central processing unit Installed in the controller to store and store data and the microprocessor Configured to include a connected error data RAM, The microprocessor is configured to repeatedly track and read the display error data stored in the error data RAM with the display related data signal outputted from the operating personal computer to track the position of the display element having a display error. And the error data processed by the microprocessor is displayed on a monitor of the operating personal computer. The plurality of one-chip central processing units according to claim 2, wherein the one-chip central processing unit is provided in plural number on the display panel according to the number of the display element modules or by groups of several display element modules. It is further connected to a one-chip CPU address selector each having a position-specific data, and the display error data from the plurality of one-chip CPUs further includes the position data of the one-chip CPU from the one-chip CPU address selectors. And a multi-drop transceiver configured to be integrated with the plurality of one-chip CPUs and to be output to the error data RAM.