JP3417284B2 - Dynamic lighting device for light emitting element - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dynamic lighting device of a light emitting element for driving lighting of a large number of light emitting elements arranged in a matrix of vertical and horizontal directions. The present invention relates to a technique for reducing the number of cables and ensuring brightness when a light emitting element is turned on.

[0002]

2. Description of the Related Art X-ray imaging is frequently performed in a radiology department of a hospital. In the radiology department, an appropriate type of radiographic technique and a radiographic type for the radiographic technique are selected and determined according to an X-ray radiograph request from a doctor. For example, if the region to be imaged is the chest and the image content is in three directions, the standing Bukki type is selected as the imaging technique, and front imaging, side imaging, and oblique imaging are selected as the imaging types. Then, the X-ray control device controls the X-ray tube or the like for irradiating the patient with X-rays in accordance with the control condition stored in advance so that the X-ray imaging in the imaging mode described in the X-ray imaging request slip is performed. Will be done.
At this time, in the case of a popular type (general-purpose type) X-ray controller,
Using the console 81 as shown in FIG. 7, necessary setting operations are performed according to the selection decision result. Normally, the control cabinet of the X-ray controller is placed in the radiographing room, and the operation console 81 is placed in the operation room. However, in the case of fluoroscopic imaging of the digestive system, the illumination of the operation room is turned off to darken the room. From that,
The display of the console 81 must be sufficiently visible even if it is slightly dark. However, popular type (general-purpose type)
In the case of, low price is also required. Therefore, in the case of the console 81, a large number of Ls such as a light emitting display device 82 for 7-segment type numerical display and a surface emitting display device (a device in which a plurality of LEDs are arranged to widen the light emitting surface) 83 are used.
Good visibility is realized at a low price by arranging the ED and sending necessary data from the control cabinet side through an electric cable to dynamically light a large number of LEDs.

[0003]

However, in the case of the conventional LED dynamic lighting system applied to the console 81, the number of electric cables for data transmission is very large, and the brightness during lighting is high. There is a problem that is not enough.

A conventional dynamic lighting system will be described by taking as an example a case where eight light emitting display devices DB for 7-segment numeral display are dynamically lit as shown in FIG. Of course, each light emitting display device DB is shown in FIG.
As shown in (a) and (b), eight Ls including the decimal point are included.
It is a known device that has EDa to h and displays a desired number by selectively lighting LEDs a to h simultaneously. Therefore, in the case of the dynamic lighting method of FIG. 8, a total of 64 LEDs by 8 light emitting display devices DB are 8
It will be arranged in a matrix with 8 rows and 8 LEDs of the same segment in each column (vertical direction).
In each row (horizontal direction), eight LEDs of the same device DB are arranged.

On the other hand, from the lighting control unit 92, data buses da0 to da7 for lighting data and data buses db0 to db7 for row scanning data are connected to the light emitting element installation unit 94 side through an electric cable 93. The lighting data and the row scanning data are transmitted to the light emitting element installation section 94 via the electric cable 93. The row scanning data is a scanning signal for sequentially designating each row in the matrix array with a predetermined blanking time, and the lighting data is associated with the matrix array and stored in each LEDa.
In the lighting control unit 92, the lighting control unit 92 collectively reads the lighting data of the same row according to the row scanning data and outputs the lighting data to the light emitting element installation unit 94 side. Has become. The lighting data and the row scanning data are sent to each LEDa through the drivers 95 and 96.
Data bus db0 for row scan data as a result of being supplied to h
As db7 is turned on sequentially from the left side with a blanking time, the eight light emitting display devices DB are also driven one by one from the left side, and when the light emitting display device DB at the right end is turned on, The lighting drive is repeated from the leftmost light emitting display device DB again, and dynamic lighting is performed.

Therefore, in the case of the dynamic lighting system shown in FIG. 8, after all, 16 electric cables 93 are required to drive 64 LEDs in total. Further, as shown in FIG. 10, there is a delay period DT due to the transistor or the like of the driver 96 at the time of the fall of each row scan data in the data buses db0 to db7, and when the next light emitting display device DB starts the lighting drive immediately, The previous light emitting display device DB is also driven to be turned on at the same time during the delay period DT, and as a result, double lighting occurs. Therefore, the blanking period BT is opened, and the next row scan data rises after the delay period DT has passed, thereby preventing double lighting of the light emitting display device DB. However, if the number of light emitting display devices DB, that is, the number of rows is large, the lighting cycle becomes long and the lighting time per unit time decreases,
As a result, the brightness of the light emitting display device DB decreases. Of course, if the blanking period BT is shortened, the brightness is increased, but as described above, since the double lighting occurs, the blanking period BT cannot be shortened.

In view of the above circumstances, the present invention can reduce the number of electric cables for sending the lighting control data necessary for performing the dynamic lighting to the light emitting element side, and can sufficiently reduce the luminance when the light emitting element is turned on. It is an object of the present invention to provide a dynamic lighting device for a light emitting element that can be secured in the above.

[0008]

To achieve the above object, a dynamic light-emitting device for a light-emitting element according to the present invention comprises a light-emitting element installation portion provided with a large number of light-emitting elements arranged in a vertical and horizontal matrix. Row-scanning data for storing lighting data indicating whether or not each of the light-emitting elements is turned on in association with a matrix corresponding array and sequentially specifying each row in the matrix corresponding array with a predetermined blanking time ( A lighting control unit that collectively reads out and outputs each lighting data of the same row according to the row scanning signal) and an electric cable that transmits the lighting data and the row scanning data to the light emitting element installation unit, and the lighting control unit sequentially outputs the lighting data and the row scanning data. A light-emitting element configured such that lighting drive according to lighting data is collectively performed for each row for light-emitting elements arranged in each designated row. In the dynamic lighting device described above, the lighting control unit has a data writing function for writing and storing lighting data of each light emitting element, and data for collectively reading each lighting data of the same row (common row) according to row scanning data. Data storage means having a reading function separately from the data writing function, and at least one of lighting data and row scanning data is created as data having a bit number less than the total number of columns in the matrix corresponding array in the case of lighting data, and row scanning is performed. In the case of data, there is provided data creating means for creating as data having a bit number smaller than the total number of rows of the matrix-corresponding array, and in the light emitting element installation section, a large number of light emitting elements are provided in one of two divided groups. The light emitting elements in each group are grouped so that they belong to one of They are arranged according to the trix, and the lighting drive of the light emitting elements, which is performed according to the lighting data and the row scanning data, is such that the lighting drive period of one divided group becomes the blanking period of the other divided group. It is configured to be alternately executed between.

According to a second aspect of the present invention, in the dynamic light-emitting device for a light-emitting element according to the first aspect, the light-emitting element installation portion includes a light-emitting display device for 7-segment type numeric display, and one light-emitting display is provided. The light emitting elements for each segment of the device are all arranged in the same row in the same dividing group.

According to a third aspect of the present invention, in the dynamic lighting device for a light emitting element according to the first or second aspect, the light emitting element installation section irradiates the subject with X-rays according to control conditions stored in advance. An operation console in an X-ray control device for controlling a tube or the like, which is configured such that necessary control conditions are displayed by a light emitting element.

[Operation] Next, the operation of controlling the lighting of the light emitting element by the dynamic lighting device for the light emitting element of the present invention (hereinafter, abbreviated as “dynamic lighting device” as appropriate) will be described. In the data storage means of the lighting control unit, lighting data indicating whether or not each light emitting element is lit is written and stored by the data writing function, while each lighting data of the same row is collected according to the row scanning data by the data reading function. It is read. Then, the lighting data and the row scanning data are sent to the side of the light emitting element installation portion by the electric cable, and the lighting drive according to the lighting data is performed for the light emitting elements arranged in each row sequentially designated by the row scanning data. Dynamic lighting is executed by repeatedly continuing to collectively perform each row with a predetermined blanking time. It should be noted that the array corresponding to the vertical and horizontal matrix of the light emitting elements in the present invention does not mean a matrix array in which the light emitting elements are geometrically aligned vertically and horizontally, but row scanning data and column elements which are row elements. It means that the lighting drive is arranged so as to be driven in a matrix form by the lighting data.

In the case of the dynamic lighting device of the present invention,
At least one of the lighting data and the row scanning data is created by the lighting control unit side data creating means as the data of the number of bits less than the total number of columns in the matrix corresponding array in the case of the lighting data, and in the case of the row scanning data. Since the data is created as the number of bits less than the total number of rows in the matrix-compatible array, the number of electric cables for data transmission is reduced according to the decrease in the number of bits.

Further, in the case of the dynamic lighting device of the present invention, in the light emitting element installation section, a large number of light emitting elements are grouped so as to belong to one of the two divided groups, and the light emitting elements of each group are the same. Are arranged in a vertical and horizontal matrix corresponding to the number of rows, and between the two divided groups, the lighting drive period of one divided group is the blanking period of the other divided group. That is, during the lighting drive period of one divided group, the delay period of the other divided group can be ended, and double lighting can be reliably prevented. Then, since the lighting drive period of one of the divided groups is the blanking period of the other divided group, the lighting drive period as a whole is always in the lighting drive period, and substantially blanking-less drive is performed. It is not necessary to reduce the brightness while lighting.

According to another aspect of the dynamic lighting device of the present invention, in the light emitting display device for 7-segment numeric display provided in the light emitting element installation portion, all the light emitting elements for the segment are the same in the same group. Since they are arranged in rows, desired numbers can be displayed.

In the case of the dynamic lighting device of claim 3,
The light emitting element provided on the console of the X-ray control apparatus for X-ray photography, which is the light-emitting element installation section, clearly displays the control conditions in X-ray photography with sufficient brightness.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a circuit diagram showing a configuration around a lighting control portion of a dynamic lighting device of an embodiment, and FIG. 2 is a circuit diagram showing a configuration around a light emitting element installation portion of the embodiment device. 1 and FIG. 2 are partially overlapped.

As shown in FIGS. 1 and 2, the dynamic lighting device of the embodiment is a light emitting display device DB for 7-segment type numerical display having the same structure as that of FIGS. 9 (a) and 9 (b).
A total of 256 light emitting diodes (LEDs) a to h (for segments) a to h corresponding to 32 are arranged in a matrix corresponding to a vertical and horizontal matrix, and row scanning data necessary for dynamic lighting of the LEDs a to h and A lighting control unit 2 that outputs lighting data and an electric cable 3 that transmits necessary data from the lighting control unit 2 to the light emitting element installation unit 1 are provided.
The dynamic lighting of h is performed.
Hereinafter, it will be described more specifically.

In the light emitting element installation portion 1, as shown in FIG. 2, 12 of 16 light emitting display devices DB out of 32 are displayed.
The eight LEDs a to h belong to the first grouping GP1 and the remaining 128 LEDs ah of the 16 light emitting display devices DB are grouped to belong to the second grouping GP2. At the same time, in each of the divided groups GP1 and GP2, the wiring is routed so that the LEDs a to h have the same vertical and horizontal matrix arrangement (16 rows and 8 columns). In each matrix (horizontal direction), 16 LEDs of the same segment are arranged, and in each row (vertical direction), 8 LEDs of the same device DB are arranged in a matrix arrangement.

In the lighting control unit 2, as shown in FIG. 1, central processing units (CPU) 4 and 256 for performing overall control.
Lighting data indicating whether or not each LED is turned on corresponds to the same array as the matrix corresponding array (by address)
Each row in the matrix-corresponding array is stored and sequentially designated with a predetermined blanking time. In accordance with the row scanning data (row scanning signal), each lighting data having the same row (in the matrix array) is collectively read. It is provided with a display memory (data storage means) 5 capable of displaying. Display memory 5
In, the writing terminal is provided on the left side (A side), and the reading terminal is provided on the right side (B side).

The CPU 4 and the left side terminal group of the display memory 5 are connected by a control bus, an address bus and a data bus. From the control bus, read / write control signals WRITE, READ and display memory via the address decoder 6. The address strobe signal ATSB as a selection signal is input to the display memory 5. An 8-bit address signal is sent from the address buses A0 to A7 to the display memory 5
Information is input to the address terminals A0A to A7A of, and data for 8-bit lighting data from the data buses D0 to D7.
The data is input to the data terminals D0A to D7A of the display memory 5. Of course, it goes without saying that the lighting data from the CPU 4 is written to the memory cells in the display memory 5 according to the address designation by the CPU 4.

Two terminals (CSB, OEB) of the three terminals for control in the terminal group on the right side of the display memory 5 are grounded,
The remaining one terminal (WEB) is connected to 5V, and the lighting data is always read from the data terminals (D0B to D7B).

On the other hand, in the lighting control unit 2, the row scanning data (row scanning signal) necessary for reading the lighting data is generated by the oscillation unit 7.
(Duty ratio 50%: frequency about 100 to 200 Hz) is generated and output by the frequency dividing unit 8 for inputting, dividing, and converting to row scanning data. That is, 32 from the frequency division unit 8 from 00000 (0) to 111111 (31)
The cycle in which the different row scan data are output to the five scan buses COM0B to COM4B in the order starting from 0 and ending at 31 continues.

Therefore, the 5-bit row scan data is
It is continuously output, and the number is 32, which corresponds to the total number of rows of both divided groups GP1 and GP2, and becomes a signal for alternately designating and scanning each row of the vertical and horizontal matrix arrays of each divided group GP1 and GP2. . And
Address of memory cell of display memory 5 and 256 LEs
The correspondence between the vertical and horizontal matrix arrangements of D and the row scan data of 5 bits is made such that every time row scan data is input, LEDa for each row of the two division groups GP1 and GP2 are displayed.
The lighting data of h is also set in advance so as to be collectively read from the display memory 5 alternately. The display memory 5 is a memory device that can read and write from two directions.

The scan buses COM0B to COM4B are connected to the address terminals A0B to A4B on the right side of the display memory 5 and the lighting data of the LEDs a to h of the row corresponding to the row scanning data input to the address terminals A0B to A4B. From data terminals D0B to D7B to eight data buses DATA0 to DA
Output in parallel to TA7. Sub canvas COM0B ~ COM4B
And 13 lines of data buses DATA0 to DATA7 are
The drivers 9 and 10 are connected to the light emitting element installation portion 1 side through 13 electric cables 3. On the other hand, in the light emitting element installation portion 1, as shown in FIG. 2, the data buses DATA0 to DATA7 for lighting data are connected to the column lines of the 256 LED segment groups GP1 and GP2 via the drivers 11 to 13. . Further, the scan buses COM0B to COM4B for row scan data are routed through the driver 14 and the inverting device 15 to the decoders 16 and 17 and the driver 1.
It is connected to 2 and 13.

The decoders 16 and 17 are devices having the same internal structure, but the operation control terminal GATE of the decoder 17 is provided with a data bus COM0B for a 1/2 frequency division signal and an inverting device 1
The operation control terminal of the decoder 16 which is connected via 5
A scan bus COM0B for 1/2 frequency dividing signal is connected to the GATE without passing through the inverting device 15, and one is activated between the decoders 16 and 17 and the other is not activated every time the row scan data is changed. The following operations are alternately repeated. Input terminal E1 of the decoders 16 and 17
Since the scan buses COM1B to COM4B are connected to E4 to E4, the decoders 16 and 17 convert the upper 4 bits of the input row scan data into 16-bit codes and output them from the output terminals Y0 to Y15. The decoders 16 and 1 receive signals from the upper 4-bit scan buses COM1B to COM4B.
7, the output terminals Y0 to Y15 are configured so that only one is in the ON level in order from the side with the smallest number, and the output terminals Y0 to Y15 are the ground terminals COM0-A of the light emitting display device DB. ~ COM15-A, COM0-B ~ It is connected to COM15-B.

Further, the operation control terminal GATE of the driver 13
Is connected to the scan bus COM0B for the 1/2 frequency division signal via the inverting device 15, and the scan control bus GATE0 for the 1/2 frequency division signal is not connected to the operation control terminal GATE of the driver 12 via the inverting device 15. Connected, driver 1
2 enters the working / non-working state in synchronization with the decoder 16,
The driver 13 is configured to enter the operating / non-operating state in synchronization with the decoder 17.

Next, the lighting control operation of the LEDs a to h by the dynamic lighting device of the embodiment having the above-described structure will be described with reference to the drawings. FIG. 3 is a graph showing changes over time in row scanning and lighting drive, and FIG. 4 is a schematic diagram showing a correspondence relationship between row scanning data and lighting data. The lighting control unit 2 writes the lighting data to the display memory 5 in a timely manner under the control of the CPU 4. Also,
At the same time as the row scanning data is created by the frequency dividing section 8, the lighting data is read from the display memory 5 according to the row scanning data, and the row scanning data and the lighting data are sent to the display element installation section 1 through the electric cable 3. Sent.

As shown in FIG. 3, 32 pieces of row scanning data are sequentially arranged at regular intervals (about 100 to 200 Hz) from 0 to 31.
The scan cycle that changes toward is repeated, but the state of the least significant bit of the row scan data from the scan bus COM0B changes each time the data changes, and the row from the scan buses COM1B to COM4B changes. The remaining 4 bits of the scan data change so that the same row is consecutive twice as 0, 0, 1, 1, ..., 14, 14, 15, 15 as the scan progresses during one scan cycle. Then, as the least significant bit of the row scan data changes, the driver 1
2, 13 and the decoders 16, 17 are synchronized and alternately repeat the operation and non-operation as described above.

As a result, while the decoders 16 and 17 alternately operate as the row scanning progresses, the decoder 16 sequentially designates the rows 0 to 15 of the dividing group GP1 from the left, and the light emitting display device DB of the designated row. The common drive of the light emitting display device DB of the designated row is turned on by the decoder 17 designating each row of 0 to 15 of the sorting group GP2 in order from the left. To run. Light-emitting display device D for the specified row
Since the driver 12 or the driver 13 of a certain divided group B is in the operating state at the same time, as shown in FIG. 4, according to the contents of the lighting data sent by the data buses DATA0 to DATA7 paired with the row scanning data, the designated row is selected. The LEDs a to h of the light emitting display device DB emit light to display numbers.

That is, as shown in the lower part of FIG. 3, the lighting drive of the divided groups GP1 and GP2 is alternately repeated, and the lighting drive period of one divided group is the blanking period of the other divided group. In the group for which the lighting drive period has ended, the corresponding driver and decoder immediately shift to the non-operational state, and double lighting is prevented. If the lighting drive period of one divided group is matched with the delay time of the other divided group, one scanning cycle time becomes the shortest. In addition, as a whole, the lighting drive period is always performed, and substantially blanking-less driving is performed. Therefore, as shown in FIG. Will be displayed.

Furthermore, the number of the electric cables 3 for sending the data necessary for the dynamic lighting to the display side is only 13 pieces. When 32 light-emitting display devices DB are dynamically lit by the conventional method shown in FIG. 8, 32 electric cables are required for transmission of row scanning data. In the case of the dynamic lighting device of the embodiment, since the frequency division unit 8 creates row scanning data for scanning 32 rows as 5-bit data, the number of electric cables can be reduced. is there. In addition, in the case of the embodiment, LEDs a to h for each segment of one light emitting display device DB are provided.
Are all configured to be in the same row in the same segmentation group, and numerical display is performed well.

Next, a configuration example of an X-ray imaging system using the dynamic lighting device of the present invention will be described. Figure 5
FIG. 3 is a block diagram showing a schematic configuration of an X-ray imaging system in which a dynamic lighting device is used. In this embodiment, the light emitting element installation unit 1 of the previous embodiment performs the X-ray imaging in the imaging mode described in the doctor's X-ray imaging request slip according to the control conditions stored in advance. It is an operation console in an X-ray control device that controls an X-ray tube or the like that irradiates X-rays. Except that the necessary control conditions are configured to be displayed by the light emitting element, the configuration and effects are similar to those of the previous embodiment, and therefore the description of the portions of substantially the same configuration is omitted and different. Only the configuration part will be described.

The X-ray imaging system shown in FIG. 5 is installed on the operation room side operation console 21 and the imaging room side, in which operating keys and a large number of LEDs for displaying control conditions and imaging progress are installed. The X-ray control device 20 is composed mainly of an X-ray control device 20 including a control cabinet 22 and an imaging device 23 that is installed in the imaging room side including an X-ray tube and a film holder. The photographing device 23 is configured to be controlled by 20 according to control conditions stored in advance. The control cabinet 22 is provided with a lighting control unit 24 having the same configuration as that of the previous embodiment, and the electric cable 2 is provided between the lighting control unit 24 and the console 21.
5, the LEDs provided on the console 21 are dynamically lit according to the row scanning data and the lighting data sent from the lighting controller 24 through the electric cable 25.

As shown in FIG. 6, the console 21 is provided with various sheet keys and the like as operating keys, and
A light-emitting display device 26 for 7-segment type numerical display shown in FIG. 9 for displaying control conditions, photographing progress, etc.
Or a surface emitting display device 27 composed of four LEDs and an LED lamp 28 composed of a single LED
Is equipped with a large number of LEDs. Similar to the previous embodiment, the large number of LEDs are grouped so as to belong to either one of the two dividing groups. The LEDs of each group are arranged in a matrix corresponding to the same number of rows. The LED lighting drive, which is performed in accordance with the lighting data and the row scanning data, is alternately executed between the two grouping groups such that the lighting drive period of one grouping group becomes the blanking period of the other grouping. In the case of the light emitting display device 26 and the surface emitting display device 27, each LED in each device belongs to the same row in the same division group.

Next, the structure of the console 21 will be described more specifically. The operation console 21 is of a sheet key type in which a plurality of sheet keys 32 capable of simultaneously specifying both a photographing technique and a photographing type in a series of photographing by the same photographing technique are arranged vertically and horizontally in a central portion on the left side. Imaging mode selection unit 3
3 is provided, and in addition to an imaging condition display section 34 indicating the conditions mainly related to the X-ray tube among the imaging conditions in the upper part, a condition mainly related to exposure of the imaging conditions in the right part is provided. The imaging condition display unit 35 shown is provided. Further, the operation console 21 is also provided with a shooting step display section 37 for displaying a shooting progress status in a series of shootings designated by the sheet key 32, in a central right portion.

Further, the operation console 21 is provided with a technique setting section 39 in which six technique designating keys 38 for setting a technique are arranged side by side in a row, and an automatic photographing step in a series of photographing is performed. Automatic shooting key 40 to set the progress
And step backward / forward keys 41 and 42 for manually setting the photographing steps in the series of photographing. When the automatic shooting key 40 is turned on, the shooting step automatically proceeds, and when the automatic shooting key 40 is turned off and the step backward key 41 is pressed once, the shooting step moves back one step and the step forward key 42 Press once to advance the shooting step by one step.

In addition to the focus size selection key 43, the console 21 has a tube current time control system (mA second system or mA system).
A selection key 44 (selecting second method), a film sensitivity setting key 45, a photo timer lighting field selection key 46, a photographing density setting key 47, etc. are also provided. The shooting condition display section 35 is provided with a number of LED lamps 28 for displaying the set lighting field, the set film sensitivity, or the set shooting density condition. Furthermore, focus size selection key 43
The LED lamp 28 is also provided on the selection key 44 for controlling the tube current time.

An input operation signal is sent to the side of the control cabinet 22 in response to a key operation on the console 21, and if necessary, it is stored in a memory cell of a display memory (not shown) in the lighting controller 24 as lighting data. Needless to say, the writing data is written, the lighting data is read according to the row scanning data, the row scanning data lighting data is sent to the console 21, and the dynamic lighting is executed.

The present invention is not limited to the above embodiment, but can be modified as follows. (1) In the above embodiment, the row scanning data has a bit number less than the total number of rows, but the lighting data or both the row scanning data and the lighting data has a total number of columns or a bit number less than the total number of rows. The data having the configuration described above is given as a modified example.

(2) In the case of the dynamic lighting device of the present invention, the vertical and horizontal matrices for a large number of light emitting elements are:
It may be an incomplete array in which there are several missing portions of the light-emitting element, and does not necessarily have to be a complete array.

(3) The dynamic lighting device of the present invention can be applied not only to the X-ray control device as described above, but also to various devices in which the light emitting element is dynamically lighted and used.

[0042]

According to the dynamic light-emitting device for a light-emitting element of the present invention, at least one of the light-up data and the row-scan data transmitted by the electric cable is less than the total number of columns or the total number of rows in the matrix corresponding array. Since it is created as number data, the number of electric cables can be reduced according to the decrease in the number of bits, and in addition, a large number of light emitting elements can be divided into groups so that they belong to one of the two groups. Since the lighting drive period of one divided group of the group is the blanking period of the other divided group, as a whole, it becomes possible to perform lighting drive without double lighting substantially without blanking, and to emit light. It is possible to secure sufficient brightness when the element is turned on.

According to the dynamic lighting device of the second aspect, in the light emitting display device for 7-segment type numeric display provided in the light emitting element installation portion, all the light emitting elements for the segment are of the same division group. Since they are lined up on the same line, a desired number can be displayed.

According to the dynamic lighting device of the light emitting element of the third aspect, the control in the X-ray imaging is performed by the light emitting element provided on the console in the X-ray control apparatus for the X-ray imaging, which is the light emitting element installation portion. The conditions can be displayed clearly with sufficient brightness.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a configuration of a lighting control unit of a dynamic lighting device according to an embodiment.

FIG. 2 is a circuit diagram showing a configuration of a light emitting element installation portion of the dynamic lighting device of the embodiment.

FIG. 3 is a graph showing changes over time in row scanning and lighting drive in the apparatus of the embodiment.

FIG. 4 is a schematic diagram showing a correspondence relationship between row scanning data and lighting data.

FIG. 5 is a block diagram showing an X-ray imaging system to which the dynamic lighting device according to the present invention is applied.

FIG. 6 is a plan view showing a console of an X-ray control device to which the dynamic lighting device according to the present invention is applied.

FIG. 7 is a plan view showing a console of a conventional X-ray controller.

FIG. 8 is a plan view showing a light emitting display device for 7-segment type numeric display.

FIG. 9 is an equivalent circuit diagram of a light emitting display device for 7-segment type numeric display.

FIG. 10 is a graph showing changes over time in the lighting state of the conventional dynamic lighting system.

[Explanation of symbols]

1 ... Light emitting element installation part 2, 24 ... Lighting control part 3, 25 ... Electric cable 4 ... CPU 5 ... Display memory 8 ... Dividing part 16, 17 ... Decoder 20 ... X-ray controller 21 ... Console 26 ... 7 segment Light-emitting display device 28 for displaying numerical formulas ... LED lamps a to h ... LED BT ... Blanking period DB ... 7-segment light-emitting display device for numerical display GP1, GP2 ... Sorting group

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G09G 3/14 G09G 3/32 G09G 3/20 G09G 3/36

Claims (3)

(57) [Claims] 1. A light emitting element installation section having a large number of light emitting elements arranged in a matrix in a vertical and horizontal direction, and lighting data indicating whether or not each of the light emitting elements is turned on are stored in association with a matrix corresponding array. Along with the row scanning data (row scanning signal) that sequentially designates each row in a matrix-compatible array with a predetermined blanking time, a lighting control unit that collectively reads and outputs each lighting data having the same row, An electric cable for transmitting lighting data and row scanning data is provided in the light emitting element installation portion, and the lighting drive according to the lighting data is performed for each row for the light emitting elements arranged in each row sequentially specified by the row scanning data. In the dynamic lighting device for light emitting elements configured to collectively perform the above, the lighting control unit writes and stores lighting data of each light emitting element. Data storage means having a data read function for collectively reading out the respective lighting data of the same row (common row) according to the row scanning data, separately from the data writing function, and the lighting data and the row scanning data. In the case of lighting data, at least one of them is created as data having the number of bits smaller than the total number of columns in the matrix corresponding array, and in the case of row scanning data, it is created as data having the number of bits smaller than the total number of rows of the matrix corresponding array. Data creation means is provided,
In the light emitting element installation section, a large number of light emitting elements are grouped so as to belong to one of the two divided groups, and the light emitting elements of each group are arranged in a matrix corresponding to the same number of rows, The lighting drive of the light emitting element, which is performed according to the lighting data and the row scanning data,
A dynamic lighting device for a light-emitting element, characterized in that the lighting drive period of one of the divided groups is a blanking period in the other divided group so that the divided groups are alternately executed. 2. The dynamic lighting device for a light-emitting element according to claim 1, wherein the light-emitting element installation portion includes a light-emitting display device for 7-segment type numeric display, and for each segment of one light-emitting display device. All of the light emitting elements are arranged in the same row in the same division group. 3. The dynamic lighting device for a light emitting element according to claim 1, wherein the light emitting element installation section controls an X-ray tube or the like for irradiating the subject with X-rays in accordance with control conditions stored in advance. A dynamic lighting device for a light-emitting element, which is a console in an X-ray control device and is configured such that necessary control conditions are displayed by the light-emitting element.