JP3072251B2 - LED display device, display data creation method of LED display device, and writing controller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an LED display device for displaying characters and figures on a dot matrix display panel on which a large number of light emitting diodes are arranged, and a method for creating display data for displaying characters and figures on the LED display device. And the appliance.

[0002]

2. Description of the Related Art Today, a light emitting diode (hereinafter simply referred to as an LED) is used.
LED) that displays characters and figures by arranging a large number of
Display devices are frequently used. In this LED display device, as shown in FIG. 11, LEDs are arranged in a matrix of many rows and many columns, and a first cathode signal is supplied from a cathode driver 15 for controlling columns as shown in FIG. C1, the second cathode signal C2, the third cathode signal C3,...
Are successively set to the L level at predetermined time intervals, and are repeatedly output up to the cathode signal Cm for controlling the last column. The anode driver 13 for controlling the line (row) outputs the LED to be lit in accordance with each timing of the cathode signals C1 to Cm.
For example, as shown in FIG. 12, when a cathode signal C1 for controlling the first column is output, the first row and the second By setting the line signals S1 and S2 of the row to the H level and setting the line signal S4 of the fourth row to the H level when outputting the cathode signal C3 for controlling the third column, The leftmost LED in the first and second rows and the third column LED from the left in the fourth row from the top can be lit, and characters and figures are displayed by combining the positions of the lit LEDs. is there.

The control of the anode driver 13 and the cathode driver 15 is performed by incorporating a microcomputer into the control unit 17 today and storing display data stored in an external memory such as a RAM or an EEPROM as a storage element of the control unit 17.
An apparatus which is read by an AM and outputs a line signal or a cathode signal from the control unit 17 based on the display data is often used.

[0004]

Today, in a dot matrix display using a large number of LEDs, display control of characters and figures is performed by computer control, and display data is
Data is stored in a ROM card or the like, and display control is performed based on the display data. This display data is created by another microcomputer or the like. Character data and the like can be relatively easily stored in a memory such as a memory card as display data, but it is difficult to create display data for special characters and figures. Was often the case.

When creating the display data, the display data must be created according to the size and control mode of the LED display device using the display data, and input of initial conditions for creating the display data is required. Settings and the like are required, and it takes time and effort to create display data, making it more difficult to create display data. The present invention eliminates such drawbacks and provides an LED display device capable of directly writing display data to the LED display device, a method for easily writing and creating display data to the LED display device, and a control tool therefor. Is what you do.

[0006]

According to a first aspect of the present invention, there is provided a control unit capable of reading a level of a line signal input terminal in an LED display unit, wherein a line signal input terminal is sequentially output while a cathode signal is output. Detecting the level of the terminal and, when the level of the line signal input terminal is not at the L level when the line signal is not output, the row controlled by the non-L level line signal input terminal in the column controlled by the output cathode signal; An LED display device having a control unit that writes on / off data as display data of the LED in the storage element.

Therefore, the present invention described in claim 1 has a control unit for reading the level of the line signal input terminal in the LED display unit.
D can detect that light is incident on the LED and a voltage is output from the LED. When the line signal is not output, the control unit outputs a cathode signal and outputs a level of each line signal input terminal. Is detected, the LED on which the light is incident can be specified based on the output column of the cathode signal and the position of the line signal input terminal which is not at the L level, and the display data of the specified LED is used as the lighting data or the turning-off data as the storage element. Therefore, the display data of each LED can be created in the LED display device.

According to a second aspect of the present invention, there is provided an LED display unit comprising LEDs arranged in a matrix, and a control unit for controlling turning on and off of each LED of the display unit by predetermined display data. And an illumination device for irradiating the LED display unit with light, wherein the control unit is configured to irradiate light from the illumination device with light from the illumination device in response to a display data correction instruction signal.
The LED display device detects the electromotive force of the ED and corrects and stores the display data according to the detected data.

Therefore, the invention described in claim 2 is
Since the control unit detects the electromotive force of the LED based on the correction instruction signal and corrects the display data, the LED of the LED display unit is illuminated when the correction instruction signal is input to the control unit, that is, in the correction mode. The display data can be corrected by irradiating the device with light. The invention according to claim 3 is an LED display unit including LEDs arranged in a matrix, a control unit that controls lighting and extinguishing of each LED of the display unit by predetermined display data,
An LED display device comprising: a lighting device that can irradiate light to the LED display unit; and a light blocking member that blocks light that can be inserted between the lighting device and the LED; The L is generated by irradiation of light from the lighting device in response to a display instruction signal for correcting display data.
The LED display device detects the electromotive force of the ED and corrects and stores the display data according to the detected data.

According to the third aspect of the present invention, it is possible to cause the control unit to perform the correction storage operation of the display data by the correction instruction signal, and to perform the LE of the illumination device and the LED display unit.
Since the light-blocking member is provided between the light-emitting device and the light-emitting device D, it is possible to irradiate the required LED with light from the lighting device, and to easily store display data for turning on or off the required LED.

[0011] Further, the invention according to claim 4 is an LED.
As an illuminating device for illuminating the LED of the display unit, illumination including light of a similar color to the LED is used. Claim 4
As described in the invention of the above, if an LED display device using illumination that emits light of the same color as that of the LED is used for the illumination device, LE
An electromotive force can be efficiently generated in D, and an input can be made so as to reliably form lighting data or extinguishing data.

[0012] The invention described in claim 5 is based on all L
By temporarily storing the lighting data as the ED display data in the storage element, the entire LED display section is lightly lit, the electromotive force of the LED is detected based on the level of the line signal input terminal, and the display data for turning off the light is stored in the storage element. This is an LED display device that changes display data of a storage element so as to store the data.

The invention described in claim 5 is an LED display device in which lighting data is temporarily stored in the storage element as display data of all the LEDs, and the LED display unit is lit lightly. The display data can be changed while performing the operation. Further, according to the invention described in claim 6, the cathode signal is sequentially output, the LED to be turned off by the display data is lightly lighted, the LED to be turned on by the display data is lighted brighter than the LED to be turned off,
Using a writing control device that emits lighting light slightly behind the light emission of the LED of the ED display unit, the line signal input terminal in the column controlled by the cathode signal output when the line signal is not output has the L level. LE of the line that is not
This embodiment employs a display data creation method for an LED display device that rewrites display data for D from on to off or from off to on.

According to a sixth aspect of the present invention, a light-off LED according to display data is lightly lit and an LED to be lit is provided.
Is turned on brighter than the LED that should be turned off, so that the display using the existing display data can be displayed as a sample, and the line signal input terminal of the column that outputs the cathode signal when the line signal is not output is Since the display data for the LED that is not at the L level is rewritten, new display data can be created by correcting the display data using the writing controller.

Further, the invention described in claim 7 uses an LED display device having a control unit capable of detecting the electromotive force of each light emitting diode in the LED display unit. A transparent film on which a display pattern such as a figure is drawn is superimposed, the transparent film is illuminated using an illuminating device, a cathode signal is sequentially output to an LED display unit, and the level of a line signal input terminal is detected. A display data creation method for storing, in a storage element, lighting or extinguishing data as display data of an LED in a row that is not at an L level in a column controlled by an output cathode signal when a level of a line signal input terminal is not at an L level during output. It is.

Therefore, the present invention according to claim 7 provides the following:
Since it has a control unit that reads the level of the line signal input terminal in the ED display unit, it is possible to detect that light is incident on the LED of the LED display unit and that a voltage is output from the LED, and draw a pattern. Because the transparent film is overlaid on the LED display and illuminated, the LE of the transparent part excluding the pattern is
The controller can generate an electromotive force in the LED that has received light when it is incident on D, and when no line signal is output, the control unit outputs a cathode signal to change the voltage level of each line signal input terminal. Because of the detection, the LE on which the light is incident depends on the position of the cathode signal output column and the line signal input terminal.
D, that is, the LED excluding the display pattern portion is specified, and the display data of the specified LED can be written into the storage element as lighting data or turning-off data.

Further, as in the eighth aspect of the present invention, all L
Once the ED lighting data is stored in the storage element
The data of the storage element may be changed such that the display section is lightly turned on, the cathode signal is sequentially output, and the data for extinguishing is stored in the storage element. According to the eighth aspect of the present invention, there is provided a method of temporarily setting display data of all the LEDs as lighting data and lightly lighting the LEDs of the lighting data.
Since each LED of the LED display section is once turned on, and after the light is turned on, that is, when the line signal input terminal in the column outputting the cathode signal when the line signal is not output, the display data for the LED in the row where the line signal input terminal is not at the L level is rewritten. The new display data can be created by correcting the display data while confirming that the display data has been changed to the turn-off data.

Further, the invention according to claim 9 is an LE
A writing control device having a control circuit that has D at its tip and turns on this LED for a short time after a predetermined time delay when this LED receives light. According to a ninth aspect of the present invention, there is provided a writing control device having an LED of the same size as the LED of the LED display unit at the tip thereof,
Light can be emitted to a specific LED of the display device, and the LED at the tip is made to emit light only for a short time after receiving light, thereby
Light can be emitted to a specific LED of the ED display unit at a predetermined timing.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In a first embodiment of an LED display device according to the present invention, as shown in FIG. 1, lighting control data from a memory 23 is read by a control unit 21 having a microcomputer. Thus, an LED display device for controlling lighting of the LED display unit 10 is provided.

This LED display device has a control unit 21 which is operated by a reference clock signal from an oscillator 19,
The display data is read from a memory 23 such as a ROM into a storage element incorporated in the control unit 21, and the cathode driver
The cathode signals C1 to Cm of the L level are sequentially output to each column of the LED display unit 10 via the LED 15, and the lighting data of each column based on the display data is converted to the line signals S1 to Sn of the H level to generate the cathode signals C1 to Cm. Is output in accordance with the timing of.

In this LED display device, a bus buffer capable of controlling conduction is inserted between the anode driver 13 and the LED display section 10, and the first bus buffer 31 cuts off a line signal via the anode driver 13. Also, the line signal input terminal of the LED display unit 10 is connected to the control unit 21 via the second bus buffer 33 and the amplifier 35, and the level of the line signal input terminal of the LED display unit 10 is set. It can be detected by the control unit 21.

The control terminal of the first bus buffer 31 and the second
The control terminal of the bus buffer 33 has the same line control signal S
01 to S0n are input from the control unit 21, and when each of the line control signals S01 to S0n is at the H level, each of the first bus buffers 31 is made conductive and the second bus buffer 33 is made nonconductive. When each line control signal is at the L level, the first bus buffer 31 is turned off and the second bus buffer is turned off.
33 is made conductive.

Further, the LED display device has a memory switch 27. By operating the memory switch 27, the display data stored in the storage element of the control unit 21 is stored in the memory.
23, and when the correction switch 25 is operated, a correction instruction signal is input to the control unit 21 to set the correction mode, and the display data stored in the storage element of the control unit 21 is changed. It can be rewritten.

That is, as shown in FIG. 2, the microcomputer incorporated in the control section 21 first reads display data from the memory 23 (S101), and outputs a cathode signal to the first common terminal of the LED display section 10 as shown in FIG. (S102), it is confirmed that the correction switch 25 is not operated, that is, the correction instruction signal is not input to the control unit 21 (S103), and the timer is reset to zero (S104). , The cathode signal C1 is output to the first common terminal (S105), and the line signals S1 to Sn are output via the anode driver 13 (S106).

At this time, L of the row to be lit in the first column is set.
A high-level signal is output to the ED, and a low-level signal is output to the LED of the row to be turned off. Each line control signal is output in accordance with each of the line signals S1 to Sn. S01 to S0n are also output, and the first bus buffer 31 is output.
Are made conductive. Of course, during this normal lighting operation, all the line control signals S01 to S0n can be fixed at the H level.

This state is maintained for ten times the reference time T0 (S107). When ten times the reference time T0 has elapsed, the output of the line signals S1 to Sn is stopped (S10).
8) At the same time, the output of the cathode signal C1 also stops (S1).
09), preparing to output a cathode signal to the next common terminal (S110), and confirming that the final common terminal (m-th) has not been reached (S111). Clear the timer to zero (S1
04) Output a cathode signal to the common terminal (S10
6) When the output of the line signal (S106) is repeated and it is confirmed that the cathode signal has been output to the final common terminal (m-th) (S111), the output of the cathode signal to the first column is performed. Returning to the preparation (S102) is repeated.

When it is confirmed that the correction switch 25 has been operated and the correction instruction signal has been input (S103), the mode is changed to the correction mode, and after the correction mode is completed, whether or not the memory switch 27 has been operated. Is determined (S12
0), if the memory switch 27 is operated, the controller 21
The display data stored in the storage element is written in the memory 23 (S121).

In the correction mode, the LED to be turned off is slightly lighted, and the LED to be turned on is turned on slightly dimmer than usual. That is, if the normal lighting is performed for 10 × T0 hours as described above, in the correction mode, the lighting time of the LED to be turned on is set to, for example, 7 × T0 hours, and the LED to be turned off is The lighting is performed only for the time T0, and as shown in FIG.
The timer is cleared to zero (S201), the cathode signal C1 is output to the first column of the LED display unit 10 prepared first (S202), and the H-level line signals are output to all rows (S203). When the reference time T0 has elapsed (S204), only the line signal of the row of the LED to be turned off returns to L level (S205), and when three times the reference time T0 has elapsed (S206), the output of the amplifier 35 is output. By reading and detecting the level of each line signal input terminal of the LED display unit 10, the low or high state of each line signal input terminal is stored in a specific first memory area (S20).
7) When four times the reference time T0 has elapsed (S208).
Also, the output of the amplifier 35 is read and the level of each line signal input terminal is stored in a specific second memory area (S20).
9), the line signals S1 to Sn of each row of the column indicated by the currently output cathode signal C1, the data in the first memory area is at L level (0), and the data in the second memory area is When there is a row at H level (1), the display data of the storage element is rewritten so that the display data of this row in the first column is changed from the unlit state to the lit state (S210). .

As described above, the level of the line signal input terminal after the lapse of 3 × T0 is confirmed and stored in the first memory area. Since the data in the first memory area is at the L level, the display of the row is performed. While confirming that the data is the extinguished data, it is confirmed that the light is incident on a specific LED at a predetermined timing because the first memory area is at the L level and the second memory area is at the H level. In addition, the off-light data is surely rewritten to the on-light data while preventing the influence of noise.

Seven times the reference time T0 has elapsed (S21).
1) When all the line signals S1 to Sn are set to the L level (S212), the output state of each amplifier 35 is stored in the first memory area (S213), and when eight times the reference time T0 has elapsed. (S214), the output state of the amplifier 35 is read again and stored in the second memory area (S215).
The display data in the row where the data in the first memory area is at L level (0) and the data in the second memory area is at H level (1) is rewritten for turning off the light (S216), and is 10 times the reference time T0. Has elapsed (S217), the cathode signal C1 is set to the H level (S218), and preparation is made to output the cathode signal to the common terminal of the next column (S21).
9) If the last column (m-th) has not been reached, the timer is reset to zero (S201), a cathode signal CX is output (S202), and a line signal is output (S2).
03) is repeated.

In the correction mode, each of the line control signals S01 to S0n is set to an H level or an L level in accordance with each of the line signals S1 to Sn. Therefore, in this correction mode, as shown in FIG. 4, the cathode signals C1 to Cm are repeatedly output from the cathode signal C1 to the first common terminal to the cathode signal Cm to the m-th common terminal sequentially. When the signals C1 to Cm are output, the LEDs to be turned on are lit with a duty ratio of 7/10, and the LEDs to be turned off are set with a duty ratio of 1/10. Then, lighting is performed, and while each cathode signal is being output, the level state of the line signal input terminal is confirmed to change the display data of the storage element.

As shown in FIG. 5, a writing control device 40 used to change the display data has an LED display
It has one of the LEDs 41 similar to the LED used in 10, and uses, for example, a pen-type controller 40 provided with a changeover switch 45 on the body. This writing control tool 40
As shown in FIG. 6, an oscillator 47 and a control circuit 43 are provided, and the output terminal of the control circuit 43 is connected to a first buffer 51 capable of controlling conduction.
The anode of the LED 41 is connected to a signal input terminal of the control circuit 43 via a second buffer 53 and an amplifier 55 capable of controlling conduction, and a control signal terminal of the control circuit 43 is connected to the first buffer 51. Control terminal and second buffer 53
And the control terminal of

The first buffer 51 conducts when the control signal E is at H level, and the second buffer 53 conducts when the control signal E is at L level. And usually, LED
Is a device that emits light by applying a voltage between its terminals. On the contrary, when light is applied to the LED, a small amount of voltage is generated between the terminals. When the signal is amplified by the amplifier 55, a control signal E is output with a slight time delay from the input signal φ0, and the lighting signal φ1 is output with a predetermined time delay. The output is made to light the LED 41.

That is, as shown in FIG. 7, when the pulse of the reference time T0 is input as the input signal φ0, the time from the input of the input signal φ0 is, for example, three times the reference time T0 and nine times the time delay. The control signal E is output only during the delay to make the first buffer 51 conductive and the second buffer 53 non-conductive, and the input signal I from the changeover switch 45 becomes H
When the signal is at the level, an H pulse having a time width of the reference time T0 is output as the lighting signal φ1 when the time is four times as long as the reference time T0 from the input signal φ0 is inputted. When the signal I is at the L level, an H pulse having a time width of the reference time T0 is output as the lighting signal φ1 when the input signal φ0 is input and the time delay is eight times the reference time T0. .

As described above, the writing control device 40 is designed to operate when the light is incident on the LED 41 provided at the tip, and when the time is delayed by four times or eight times the reference time T0 depending on the state of the changeover switch 45. The LED 41 at the front end is turned on with a time width of the reference time T0. Therefore, the reference time T
The LED 41 is turned on with a delay of four times 0, and the writing control device is displayed on the LED display unit 10 in the correction mode.
40 and bring the L of the writing controller 40 to the darkly lit LED.
When the ED 41 is brought closer, the LED 41 of the writing controller 40 becomes L
The LED is turned on with a delay of 4 × T0 with respect to the lighting of the LED of the ED display unit 10. As described above, the control unit 21 of the LED display device sends the line signal at the time of 3 × T0 time delay and 4 × T0 time delay. The level of the input terminal is stored in the first memory area and the second memory area, and when the data in the first memory area is 0 and the data in the second memory area is 1, that is, the write control tool is written in the second memory area. The light of the LED 41 provided in 40 is L
When the fact that the light is incident on the LED of the ED display unit 10 is stored, the display data of the LED is changed to the lighting data, so that the display data can be easily corrected.

The LED4 is delayed by eight times the reference time T0.
When the writing control tool 40 is brought close to the LED of the LED display unit 10 which is brightly lit in the correction mode in a state where 1 is turned on, the control unit 21 of the LED display device turns off the LED at seven times the reference time T0. Since the level of each line signal input terminal immediately after turning off the light and the level of each line signal input terminal eight times after the reference time T0 are stored in the first memory area and the second memory area, the write control is performed. LED of LED display unit 10 with LED 41 of fixture 40 close to
As for the data, 1 is stored in the second memory area, and when the data in the first memory area is 0 and the data in the second memory area is 1, the display data relating to the LED is rewritten for turning off the LED. Therefore, the display data can be easily corrected.

As described above, characters and figures are displayed on the LED display unit 10 based on the display data stored in the memory 23, and the LED of the writing controller 40 is set to the L level of the LED display unit 10.
Lighting can be turned off and light-off can be changed to light only by approaching the ED, so that the display data can be changed and corrected extremely easily, while checking characters and figures displayed on the LED display unit 10. By designating the LED to be turned on or the LED to be turned off by the writing controller 40, the display data can be easily created.

Further, in the above embodiment, one LED 41 is provided at the tip, and the LED 41 has the same size as the LED of the LED display unit 10.
Although the writing control device 40 having the ED at the tip is used, several LEDs are arranged in a line, or several LEDs are grouped vertically and horizontally.
Each LED provided at the tip of the writing control device 40 is input signal φ0
To be turned on at a predetermined timing with respect to
The display data of several to several tens of LEDs of the LED display unit 10 at a time may be changed from lighting to off, or from off to lighting.

In the above embodiment, the display data for displaying predetermined characters and figures is always used as the data to be read from the memory 23 into the storage element, but the display data for displaying predetermined characters and figures is always used. There is also a case where display data for turning off all the LEDs is read without being limited to the case of reading.In this case, instead of correcting a specific character or figure to make new display data, a new character or figure is newly read. Display data to be displayed is completely newly created. In this case, the LED to be turned on is designated by the writing control device 40, and it is similarly possible to make appropriate corrections. It can be easily created.

In the above embodiment, the writing control device 40 which emits light in synchronization with the lighting of each LED of the LED display section 10 is described.
As another method of forming display data in this LED display device, as shown in FIG. 8, a predetermined display pattern 67 is displayed on the LED display unit 10 of the LED display device.
The LED of the transparent film 66 and the LED of the LED display unit 10 may be illuminated asynchronously with the LED from above the transparent film 66 using the lighting device 60 provided with a cover.

The method of forming the display data is as follows.
A pattern 67 such as a character or a figure to be displayed on the transparent film 66 is formed on the transparent film 66 with ink or pattern paper that does not transmit light. . In the correction mode of the LED display device, as shown in FIG. 9, first, it is determined whether or not the previous process was also in the correction mode using a flag or the like, that is, whether or not it was the first correction mode ( S301) If the processing is in the first correction mode, display data for turning on all the LEDs of the LED display unit 10 is stored as display data to be stored in the storage element (S302), and based on the lighting data. To make all the LEDs lighter.

That is, during normal lighting, as described above, 10
Assuming that the lighting is performed for the time of × T0, in this correction mode, the lighting is performed with the lighting time of the LED to be lit set to, for example, 4 × T0 time, and this control first turns on all the LEDs. Display data (S302)
Thereafter, the timer is cleared to zero (S303), and the cathode signal C is supplied to the first column of the LED display unit 10 prepared first.
1 (S304), and outputs the line signals S1 to Sn based on the display data to all the rows, and also outputs the line control signals S01 to S0n corresponding to the line signals S1 to Sn (S305). When four times the reference time T0 has elapsed (S306), the output of all the line signals S1 to Sn and the line control signals S01 to S0n is stopped (S30).
7) By reading the output of the amplifier 35 and detecting the level of each line signal input terminal of the LED display section 10, the low or high state of each line signal input terminal is stored in a specific memory area (S308). When there is a row where the line signals S1 to Sn of the respective rows of the column indicated by the currently output cathode signal Cx and the data U1 to Un in the memory area are 1, the display data of this row in this column is displayed. The display data of the storage element is rewritten so as to change from the lighting state to the lighting state (S309).

In this embodiment, the LED of the lighting data is turned on for 4 × T0 time, and the level of the line signal input terminal at the time when the lighting time has elapsed is confirmed, and the LED display unit 10 is turned on.
And stores in the memory area detection data indicating whether or not the voltage of the line signal input terminal of each row in the column indicated by the predetermined cathode signal is at the L level. The stored data indicates that the line signal input terminal is not at the L level, so that it is confirmed that light is incident on the LED of the specific column in the specific row, and the lighting data is rewritten to the lighting-off data.

When ten times the reference time T0 has elapsed (S310), the cathode signal C1 in the first column is set to the H level (S311), and preparation is made to output the cathode signal to the common terminal in the next column (S311). (S312), it is determined whether or not the last column (m-th) has been reached (S313). If the last column has not been reached, the timer is reset to zero (S30).
3) The output of the cathode signal CX (S304) and the output of the line signal (S303) and rewriting of the display data related to the predetermined LED (S309) are repeated.

In this correction mode, each of the line control signals S01 to S0n may be set to an H level or an L level in accordance with each of the line signals S1 to Sn.
All the line control signals S01 to S0n may be set to the H level by four times the reference time T0. Then, the cathode signal CX
When the preparation is made to sequentially output the first column C1 to the last column Cm, output the cathode signal Cm of the last column, and output the cathode signal CX of the next column (S312), By confirming the column number (S313),
It is determined that the output of the cathode signal Cm of the last column has been completed (S313), and as shown in FIG.
It is determined whether or not 27 has been operated, that is, whether or not to transfer the display data of the storage element to the memory 23 (S120). If the memory switch 27 has not been operated, the first common terminal in the LED display unit 10 is determined. Returning to the preparation for outputting the cathode signal (S102), it is confirmed that the correction switch 25 is on (S103), and it is further determined whether or not the correction mode is the first correction mode (S301). Since the mode is the mode, the timer is cleared to zero (S303), the cathode signal C1 is output to the first column of the LED display unit 10 prepared first (S304), and a part of the storage element is rewritten to the light-off data. A line signal as an H-level line signal is output to the LED of the lighting data based on the display data (S305), and the LED is lightened with a lighting time four times the reference time T0. To (S306, S30
7), the L level of the line signal input terminal is detected, and the low or high state of each line signal input terminal is stored in a specific memory area (S308), and the lighting data for the predetermined LED is rewritten to the extinguishing data (S309). ) Is repeated.

Therefore, in this correction mode, as shown in FIG. 10, the outputs of the cathode signals C1 to Cm are sequentially changed from the cathode signal C1 to the first common terminal to the cathode signal Cm to the m-th common terminal. Are sequentially repeated, and the LEDs to be lit at the time of output of each of the cathode signals C1 to Cm are lit at a brightness with a duty ratio of 4/10 of the normal brightness, and LE to turn off
For D, change the display data of the storage element by checking the level state of the line signal input terminal while each cathode signal is being output so that the LEDs that have received the lamp light of the lighting device 60 are sequentially turned off. Is what you do.

As described above, in this embodiment, the LED
A transparent film 66 on which a display pattern 67 such as characters and figures to be displayed on the display unit 10 is drawn is superimposed on the LED display unit 10 to provide a lighting device.
60 illuminates the transparent film 66, usually
The LED emits light by applying a voltage between its terminals. On the contrary, when the LED is irradiated with light, a small amount of voltage is generated between the terminals of the LED. The LED in the transparent portion which is not received receives the light of the lighting device 60 and generates a voltage.
Despite the addition of X, the voltage of the line signal input terminal of the row of received LEDs becomes higher than the L level. Is used as the light-off data.

As described above, LE is set to LE four times the reference time T0.
D is turned on, first, display data for lighting is formed on all the LEDs, and the LED display section is set in the correction mode.
When the illumination device 60 illuminates the transparent film 66 on which the display pattern 67 is drawn on the display 10, the LEDs of the LED display section 10 are lightly lit, and the cathode signals C 1 to Cm are input, and the time is four times the reference time T 0. When the light is emitted from the lighting device 60 to the LED when the time has elapsed, the display data can be changed to data for turning off the light, and the LED can be turned off at the next dynamic lighting. it can. Therefore, when light is irradiated on the LED by the lighting device 60, the LED
Changes from a faint lighting to an extinguished state except for the LED to be lit, and R as a storage element incorporated in the control unit 21
The required LED can be turned off using the lighting device 60 while checking whether the required display data is formed in the AM.

The illuminating device 60 allows a large number of LEDs in a predetermined range to be illuminated at once by a cover. By mounting a plurality of lamps as a light source inside the illuminating device 60, the LED display section 10 is provided. It may be possible to illuminate a relatively wide area at a time. In addition to illuminating a part of the LED display unit 10 as shown in FIG. LED display section 10
In some cases, it is possible to illuminate the entire surface of the vehicle.

The lamp incorporated in the lighting device 60 is as follows.
If a device that emits light containing the wavelength of the light emitted by the LED attached to the LED display unit 10 is used, an electromotive force can be generated in the LED, but any lamp that emits the same wavelength as the wavelength of the light emitted by the LED can be used. Even if the LED is irradiated with light of the same illuminance, a large electromotive force can be generated by the LED. Therefore, it is necessary to use a lamp that emits light of the same color as the light emitted by the LED, that is, a lamp that emits light of the same color. It is preferable to surely convert the display data into the light-off data.

As described above, the LED of the LED display unit 10 is provided with the illuminating device 60 capable of irradiating light to the LEDs, and the electromotive force of the LEDs is controlled by the control unit 21 which is set to the correction mode by the correction instruction signal. Based on the output timing of the cathode signal and the level of the line signal input terminal, the detected data for the predetermined LED is stored in the memory area, and the display data is corrected based on the detected data.
With the display device, an LED display device that can easily input display data can be provided.

Further, by using a light-shielding member such as a transparent film 66 on which a display pattern 67 is drawn as an LED display device which can be inserted between the illumination device 60 and the LED display portion 10, the illumination device
60 light is blocked by a light-blocking member, and only a predetermined LED is used to illuminate
By irradiating 60 lights, it is possible to provide an LED display device that can easily input required display data.

When the display data is formed in the storage element, the display data for turning off all the LEDs of the LED display section 10 is temporarily stored in the storage element, and the received LE data is stored.
The display data may be rewritten so that D is turned on. In addition to the case where the display data for turning on or off all the LEDs of the LED display unit 10 is temporarily stored in the storage element, the display data for turning on the predetermined LED is stored in the storage element. In some cases, a transparent film 66 is overlaid on a predetermined range on the LED display unit 10 in which a predetermined LED is lit according to the data, and the illuminating device 60 rewrites and corrects the display data.

Further, patterns 67 to be displayed as characters or graphics
In addition to making the part of the display pattern opaque, it is also possible to use a transparent film 66 that makes the part of the display pattern 67 transparent and the other part is opaque so as to block light. Alternatively, by providing a light shielding member such as a transparent film 66 disposed between the lighting device 60 and the LED of the LED display unit 10, a predetermined display pattern 67 can be easily formed using the lighting device 60. Display data for turning on or off can be stored in a storage element incorporated in the control unit 21.

[0055]

The LED according to the present invention described in claim 1
The display device is a control unit that reads the level of the line signal input terminal of the LED display unit, and displays the LED of the line of the line signal input terminal that is not at the L level of the column that outputs the cathode signal when the line signal is not output. Since a control unit for writing data to the storage element is provided, display data can be directly formed on the storage element of the LED display device by irradiating the LED of the LED display unit with light.
While specifying the LED on the display unit of the D display device, the display data for turning on or off the LED can be easily displayed by the LED.
It can be stored in a display device.

Further, the invention according to claim 2 is provided with an illuminating device for irradiating the LED display unit light, and detects the electromotive force of the LED by the irradiation of the light from the illuminating device according to the correction instruction signal. Since the LED display device has the control unit that corrects the display data according to the data, the display device can be appropriately corrected in the correction mode by irradiating the LED of the LED display unit with light by the lighting device.

The invention according to claim 3 is an LE
Since there is a lighting device capable of irradiating the D display unit with light and a light-blocking member that can be inserted between the lighting device and the LED, the required LED is covered with the light-blocking member, and light is emitted to another LED by the lighting device. Can be illuminated and the required LED
It is possible to easily input display data for turning on or off a required LED by generating an electromotive force in the LEDs other than.

Further, in the invention described in claim 4, since the illumination device uses illumination that emits light of the same color as that of the LED, the electromotive force generated in the LED is effectively increased, and the display data can be reliably transmitted. Changes can be made. Further, according to the invention described in claim 5, the lighting data is temporarily stored in the storage element as the display data of all the LEDs, the entire LED display section is lighted slightly, and the electromotive force of the LED is detected based on the level of the line signal input terminal. Since the LED display device can change the display data of the predetermined LED into the data for turning off the light, the input of the display data can be performed while confirming the contents of the display data by the light-on state of the LED display unit. .

According to a sixth aspect of the present invention, the method of lighting the LED to be turned off lightly and lighting the LED to be turned on brighter than the LED to be turned off confirms the display contents based on the existing display data. Since it is a method of instructing individual LEDs by the writing control tool and changing the data to lighting data or extinguished data, it is possible to easily correct the display data while specifically confirming the individual LEDs as being turned on or off. This is a method by which new display data can be created.

According to a seventh aspect of the present invention, there is provided a display data generating method for an LED display device according to the present invention, wherein an LED display device having a control unit for reading the level of a line signal input terminal of the LED display unit is used to perform a required display. A film on which a pattern is drawn is superimposed on the LED display unit to illuminate the film, and when the line signal is not output, the display data of the LED in the row of the line signal input terminal which is not at the L level in the column outputting the cathode signal is stored in the storage element. Irradiating a predetermined LED of the LED display unit with light,
The display data can be formed directly on the storage element of the ED display device, and the display data can be easily formed by irradiating the LEDs in the LED display section in a predetermined range at once using a film on which a pattern is drawn. It is a method that can be memorized.

Further, the invention described in claim 8 is a method for once turning on all the LEDs lightly, and is a method for producing display data in which illumination light is given by an illumination device and sequentially changed to light-off data. This is a method in which display data can be easily created while checking whether each LED is turned on or off. According to a ninth aspect of the present invention, a writing control device having an LED at a tip, and having a control circuit for lighting the LED with a predetermined time delay after the LED receives light, is independent of the LED display device. The LED of the LED display device can be irradiated with light at a predetermined timing with respect to the LED of the LED display device.

[Brief description of the drawings]

FIG. 1 is a circuit block diagram of an LED display device according to the present invention.

FIG. 2 is a flowchart showing a lighting control operation of the LED display device according to the present invention.

FIG. 3 is a flowchart showing an operation of a correction mode of the LED display device according to the present invention.

FIG. 4 is a time chart showing a lighting signal in a correction mode in the LED display device according to the present invention.

FIG. 5 is an external view showing an example of a writing control device according to the present invention.

FIG. 6 is a circuit block diagram of a writing control device according to the present invention.

FIG. 7 is a time chart showing the state of each signal of the writing control device according to the present invention.

FIG. 8 is a diagram showing an outline of a method for correcting an LED display device according to the present invention.

FIG. 9 is a flowchart showing the operation of the LED display device according to the present invention in the correction mode.

FIG. 10 is a time chart showing a lighting signal in a correction mode in the LED display device according to the present invention.

FIG. 11 is a diagram showing an example of a circuit main part in a conventional LED display device.

FIG. 12 is a flowchart showing a lighting control operation in a conventional LED display device.

[Explanation of symbols]

Reference Signs List 10 LED display unit 13 Anode driver 15 Cathode driver 17 Control unit 19 Oscillator 21 Control unit 23 Memory 25 Correction switch 27 Memory switch 31 First bus buffer 33 Second bus buffer 35 Amplifier 40 Write controller 41 LED 43 Control circuit 45 Switch 47 oscillator 51 first buffer 53 second buffer 55 amplifier 60 lighting device 66 transparent film 67 display pattern

Claims (9)

(57) [Claims] 1. A control unit capable of reading the level of a line signal input terminal in an LED display unit, detecting a level of the line signal input terminal while sequentially outputting a cathode signal, and detecting the level of the line signal when no line signal is output. When the level of the line signal input terminal is not at the L level, the data for lighting or extinguishing as the display data of the light emitting diodes of the row controlled by the line signal input terminal which is not at the L level in the column controlled by the output cathode signal. An LED display device comprising a control unit for writing to a storage element. 2. An L display comprising: an LED display section comprising light emitting diodes arranged in a matrix; and a control section for controlling turning on and off of each light emitting diode of the display section by predetermined display data.
The ED display device, further comprising: a lighting device capable of irradiating the LED display unit with light, wherein the control unit uses a display data correction instruction signal to emit the light from the lighting device. An LED display device for detecting an electromotive force and correcting and storing display data in accordance with detection data for detecting the electromotive force. 3. An L display comprising: an LED display section comprising light emitting diodes arranged in a matrix; and a control section for controlling turning on and off of each light emitting diode of the display section by predetermined display data.
An ED display device, comprising: a lighting device that can irradiate the LED display unit with light; and a light blocking member that blocks light that can be inserted between the lighting device and the light emitting diode. Detecting an electromotive force of the light emitting diode generated by irradiation of light from the illumination device with a display data correction instruction signal, and correcting and storing the display data in accordance with the detection data obtained by detecting the electromotive force. An LED display device characterized by the above-mentioned. 4. The LED display device according to claim 2, wherein the illumination device is an illumination device that emits illumination light including white light or light of a similar color to the light emitting diode. 5. LE data is stored once in a storage element as display data for all light emitting diodes.
It is characterized in that the display data of the storage element is changed so that the entire D display unit is lightly lit, the electromotive force of the light emitting diode is detected based on the level of the line signal input terminal, and the display data for turning off the light is stored in the storage element. The LED display device according to claim 1. 6. A cathode signal is sequentially output, a light emitting diode to be turned off according to display data is lightly lighted, a light emitting diode to be turned on according to display data is lighted brighter than a light emitting diode to be turned off, and light emission of the LED display unit is performed. A row in which a line signal input terminal is not at an L level in a column controlled by a cathode signal output when a line signal is not output, using a writing control device that emits lighting light slightly behind the light emission of the diode. Rewriting the display data for the light emitting diode from on to off or from off to on. 7. An LED display device comprising a control unit capable of detecting an electromotive force of each light emitting diode in an LED display unit in which light emitting diodes are arranged in a matrix, and
A transparent film on which a display pattern such as a character or a figure is drawn is superimposed on the D display unit, the transparent film is illuminated using an illumination device, and a cathode signal is sequentially output to the LED display unit to detect the level of the line signal input terminal. When the level of the line signal input terminal is not L level when the line signal is not output,
A display data creation method for an LED display device, comprising: storing, in a storage element, display data for turning on or off light as display data of a light emitting diode in a row other than the L level of a column controlled by an output cathode signal. 8. Lighting data is temporarily stored in a storage element as display data of all the light emitting diodes, so that L
The display data of the storage element is changed so that the entire ED display section is lightly lit, a cathode signal is sequentially output, and data for turning off the light is stored in the storage element as display data for a required light emitting diode. Item 9. A display data creation method for an LED display device according to Item 7. 9. A writing control device comprising a light emitting diode, and a control circuit for turning on the light emitting diode for a short time after a predetermined time delay when the light emitting diode receives light.