JPS6318046Y2 - - Google Patents

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Publication number
JPS6318046Y2
JPS6318046Y2 JP1979057607U JP5760779U JPS6318046Y2 JP S6318046 Y2 JPS6318046 Y2 JP S6318046Y2 JP 1979057607 U JP1979057607 U JP 1979057607U JP 5760779 U JP5760779 U JP 5760779U JP S6318046 Y2 JPS6318046 Y2 JP S6318046Y2
Authority
JP
Japan
Prior art keywords
row
rows
column
columns
display
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
JP1979057607U
Other languages
Japanese (ja)
Other versions
JPS55157283U (en
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1979057607U priority Critical patent/JPS6318046Y2/ja
Publication of JPS55157283U publication Critical patent/JPS55157283U/ja
Application granted granted Critical
Publication of JPS6318046Y2 publication Critical patent/JPS6318046Y2/ja
Expired legal-status Critical Current

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  • Digital Computer Display Output (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Description

【考案の詳細な説明】 本案は発光ダイオードを用いた多桁のドツトマ
トリクス表示器を高輝度に駆動する装置に関す
る。
[Detailed Description of the Invention] The present invention relates to a device for driving a multi-digit dot matrix display using light emitting diodes to high brightness.

従来、4×5,5×7,7×7等、複数の行と
複数の列とそれら行と列との間に接続された発光
ダイオードとでドツトマトリクス表示器を構成
し、選択的に発光させることで数字や文字、記号
等を表示する駆動装置に於て、信号線の数を少な
くするために選択信号をシリアル処理してきた
が、このため表示器が多桁となると信号処理時間
が長くなつて表示がちらつくし、表示をちらつか
せないために繰返し周波数を高くして発光ダイオ
ードの駆動時間を短かくすると発光ダイオードは
残光特性が無いので輝度不足を生じた。
Conventionally, a dot matrix display is configured with multiple rows and columns such as 4×5, 5×7, 7×7, etc., and light emitting diodes connected between the rows and columns, and selectively emit light. In driving devices that display numbers, characters, symbols, etc. by digitizing, selection signals have been serially processed in order to reduce the number of signal lines, but as a result, when the display device has a large number of digits, the signal processing time becomes long. As a result, the display flickered, and in order to prevent the display from flickering, the repetition frequency was increased and the driving time of the light emitting diode was shortened, but the light emitting diode did not have afterglow characteristics, resulting in insufficient brightness.

即ち、第1図は従来の代表的な駆動回路のブロ
ツク図と各点a,b,…eの波形図であるが、信
号回路1の信号によつてたとえば表示器2,2…
2の列を切換回路3で波形図b1,b2…bjのように
順次切換え、このオン時間内に行信号の処理と点
灯とを行なうものである。行信号C1,C2…Ciは端
子6,6…6から各表示器2,2…2の共通の行
(例えば行信号C1には各表示器の第1行)毎にシ
リアル信号として、列信号b1,b2…bjに対応して
1列分ずつ入力され、シフトレジスタ4によつて
波形図d1のようなシリアル信号に変換され、各表
示器2,2…2毎に設けられたレジスタ5,5…
5に送られる。この信号処理後、レジスタ5,5
…5のゲートが一斉に開き、たとえば波形図eの
ような信号が出力されるが、任意の1つの発光ダ
イオードに注目すると波形図fのような駆動パル
スが与えられることになり、この時の、駆動パル
スのデユーテイサイクルは デユーテイサイクル=(通電時間(ロ))/(一周期
の時間(イ)) =(1列の通電時間(ハ))−(一列分の行信号
の処理時間(ニ))/(列の数)×(1列の通電時間(ハ)
) となり、デユーテイサイクルが大きい方が明る
い表示となるので(1列の通電時間)を固定する
と(一列分の行信号の処理時間)が表示の明るさ
に影響する。これは信号回路1から出力されるク
ロツク信号(波形図a)によつて1クロツク毎に
1処理されるが、シリアル処理が含まれるため 処理時間(ニ)=(表示器の個数)×{(行の数) +1}×(クロツク信号巾) 但し式中の1は処理開始を指示する信号の数 となり、これは表示器の個数が多くなればなる
程長い時間が要求されることを意味し、従つてデ
ユーテイサイクルが小さくなる。発光ダイオード
に流す電流の大きさには限度があるので、デユー
テイサイクルが小さくなるのは表示が暗くなるこ
とにつながる。
That is, FIG. 1 is a block diagram of a typical conventional drive circuit and a waveform diagram of each point a, b, .
The switching circuit 3 sequentially switches the row signals b 1 , b 2 . . . b j as shown in the waveform diagram b 1 , b 2 . Row signals C 1 , C 2 ...C i are serial signals from terminals 6, 6 ... 6 for each common row of each display 2, 2 ... 2 (for example, row signal C 1 is the first row of each display) are input one column at a time corresponding to the column signals b 1 , b 2 . . . Registers 5, 5...
Sent to 5. After this signal processing, registers 5, 5
...5 gates open all at once, and a signal as shown in the waveform diagram e is output, but if we focus on any one light emitting diode, a driving pulse as shown in the waveform diagram f will be given, and at this time , the duty cycle of the drive pulse is: Duty cycle = (energizing time (b)) / (one cycle time (a)) = (energizing time for one column (c)) - (row signal for one column) Processing time (D) / (Number of rows) × (Electrification time for one row (C)
) The larger the duty cycle, the brighter the display, so if (the energization time for one column) is fixed, the (processing time for row signals for one column) will affect the brightness of the display. This is processed once every clock by the clock signal (waveform diagram a) output from signal circuit 1, but since serial processing is included, processing time (d) = (number of displays) x {( (number of rows) + 1} × (clock signal width) However, 1 in the formula is the number of signals instructing the start of processing, which means that the more displays there are, the longer the time required. , so the duty cycle becomes smaller. Since there is a limit to the amount of current that can be passed through a light emitting diode, a smaller duty cycle will lead to a darker display.

本案は上記の欠点を改め、信号処理時間を短か
くして表示の明るさを高い状態に保つもので、以
下本案を詳細に説明する。
The present invention corrects the above-mentioned drawbacks, shortens the signal processing time, and maintains the brightness of the display at a high level.The present invention will be described in detail below.

第2図は本案実施例のマトリクス駆動装置の回
路図で、第3図は第2図の各点の波形図であり、
各点の名称g,h1,h2…は波形図の名称と対応し
ている。図において、7は行信号を送つてくる機
器(後述)のクロツク信号と同期したたとえば周
期1μsecのクロツク信号gを発生する信号回路で、
必要に応じてクロツク信号入力端子とバツフア回
路とで構成してもよいし、発振回路で構成しても
よい。8…8は7行5列からなる発光ダイオード
を用いたドツトマトリクスの表示器で、ダイオー
ドの記号〓を黒色にしてあるところが点灯し、S
…Dと表示しているとする。9は切換回路で、信
号回路7から出されているクロツク信号gに同期
して表示器8…8の5本の列を例えば周期ホ10m
secで切換える。10,10…10はマイクロコ
ンピユータやキヤラクタ・ゼネレータ等の機器か
ら表示器8…8の共通の行(たとえばP1…q1とか
P2…q2)に対する選択信号がシリアル信号の形で
入力されるので、この行信号を受ける入力端子で
ある。11,11…11は入力端子10,10…
10から入つてくるシリアル信号をそれぞれの表
示器に分配し、一斉に出力するシリアル入力パラ
レル出力型のシフトレジスタで、信号回路7から
のクロツク信号gに同期して動作し、出力は各表
示器8…8の行線に接続されている。
FIG. 2 is a circuit diagram of the matrix drive device according to the embodiment of the present invention, and FIG. 3 is a waveform diagram of each point in FIG.
The names g, h 1 , h 2 . . . of each point correspond to the names of the waveform diagram. In the figure, 7 is a signal circuit that generates a clock signal g with a period of 1 μsec, for example, in synchronization with the clock signal of the device sending the row signal (described later).
If necessary, it may be constructed from a clock signal input terminal and a buffer circuit, or may be constructed from an oscillation circuit. 8...8 is a dot matrix display using light emitting diodes, which is arranged in 7 rows and 5 columns.
...Assume that it is displayed as D. Reference numeral 9 denotes a switching circuit which switches the five columns of indicators 8...8 in synchronization with the clock signal g output from the signal circuit 7, for example, with a period of 10 m.
Switch with sec. 10, 10...10 are signals from devices such as microcomputers and character generators to common lines of displays 8...8 (for example, P 1 ...q 1, etc.).
Since the selection signal for P 2 ...q 2 ) is input in the form of a serial signal, this input terminal receives this row signal. 11, 11...11 are input terminals 10, 10...
This is a serial input/parallel output type shift register that distributes the serial signals coming in from 10 to each display and outputs them all at once.It operates in synchronization with the clock signal g from signal circuit 7, and the output is sent to each display. 8...Connected to the 8th row line.

今、切換回路9が第1列に切換えた時点である
とするとh1のみが高いレベルヘとなりh2からh5
でが低いレベルとなる。キヤラクタ・ゼネレータ
等から入力端子10,10…10に第1列の分の
選択信号ト,ト…トが7行分送られ、この各選択
信号は表示器8…8の個数分のデータを含んでい
る。この選択信号ト,ト…トはシフトレジスタ1
1,11…11でそれぞれ表示器8…8に割りあ
てられ、その後各行信号P1,P2…P7,q1,q2…q7
として出力されるのでたとえば第1の表示器の第
1行第1列の発光ダイオード12は列信号ヘと行
信号チとによつて不灯となり最後の表示器の第1
行第1列の発光ダイオード13は列信号ヘと行信
号リとによつて点灯となる。以下同様に第2列か
ら第5列まで駆動され、再び第1列から繰返し駆
動される。
Assuming that the switching circuit 9 has now switched to the first column, only h1 goes to a high level and h2 to h5 go to a low level. Selection signals T, T... for the first column are sent from the character generator etc. to the input terminals 10, 10...10 for seven rows, and each selection signal includes data for the number of indicators 8...8. I'm here. These selection signals T, T...T are the shift register 1
1, 11...11 are assigned to the display devices 8...8, respectively, and then each row signal P1 , P2 ... P7 , q1 , q2 ... q7
For example, the light emitting diode 12 in the first row and first column of the first display is turned off by the column signal H and the row signal H, and the first light emitting diode 12 of the last display
The light emitting diode 13 in the first row and column is turned on by the column signal and the row signal. Thereafter, the second to fifth columns are driven in the same manner, and the first column is repeatedly driven again.

従つて任意の1つの発光ダイオードが点灯され
る場合を考えると、波形図rとなり、信号処理に
必要な時間ヌは(表示器の数)×(クロツク信号
巾)となり従来の{(行の数)+1}分の1だけ短
かくてすむ。上述の5×7ドツトマトリクスの場
合は従来の1/8の時間となるのでそれだけ点灯時
間ルが長くなり表示が明るく保てる。
Therefore, if we consider the case where any one light emitting diode is lit, the waveform diagram will be r, and the time required for signal processing will be (number of displays) x (clock signal width), as in the conventional case {(number of rows). ) + 1} times shorter. In the case of the above-mentioned 5×7 dot matrix, the lighting time is 1/8 of the conventional one, so the lighting time is correspondingly longer and the display can be kept brighter.

本案は上述の例で示した如く、複数の行と、複
数の列と、それらの行と列との間に接続された発
光素子とからなるマトリクス型の表示器を複数個
駆動するためのマトリクス駆動装置であつて、各
表示器の共通の行(又は列)を順次選択する切換
回路と、各表示器の共通の列(又は行)のそれぞ
れに接続された複数のシリアル入力パラレル出力
型のシフトレジスタと、そのシフトレジスタのそ
れぞれに列(又は行)のデータをシリアルで送る
入力手段と、切換回路およびシフトレジスタにク
ロツクパルスを送る信号回路とを具備するもので
あるから、多桁接続しても配線の数も従来より増
えることなく略一定の表示の明るさが保てる。
As shown in the example above, the present invention uses a matrix for driving a plurality of matrix-type displays each consisting of a plurality of rows, a plurality of columns, and light emitting elements connected between the rows and columns. The driving device includes a switching circuit that sequentially selects a common row (or column) of each display, and a plurality of serial input/parallel output type switching circuits connected to each of the common columns (or rows) of each display. Since it is equipped with a shift register, input means for serially sending column (or row) data to each of the shift registers, and a signal circuit for sending clock pulses to the switching circuit and the shift register, it is possible to connect multiple digits. Almost constant display brightness can be maintained without increasing the number of wires compared to conventional technology.

尚本案は上述の実施例に限定されるものではな
く16セグメント型マトリツクス接続アルフアニユ
ーメリツク表示器に利用する等、本案の主旨を逸
脱しない範囲で適用出来るものである。
The present invention is not limited to the above-mentioned embodiments, but may be applied to a 16-segment matrix-connected alphanumeric display without departing from the spirit of the present invention.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は従来の駆動回路のブロツク図とその波
形図、第2図は本案実施例の駆動装置回路図、第
3図は第2図の各点の波形図である。 7……信号回路、8…8……表示器、9……切
換回路、10,10…10……入力端子、11,
11…11……シフトレジスタ。
FIG. 1 is a block diagram of a conventional drive circuit and its waveform diagram, FIG. 2 is a circuit diagram of a drive device according to an embodiment of the present invention, and FIG. 3 is a waveform diagram at each point in FIG. 7...Signal circuit, 8...8...Display device, 9...Switching circuit, 10, 10...10...Input terminal, 11,
11...11...Shift register.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 複数の行と、複数の列と、それらの行と列との
間に接続された発光素子とからなるマトリクス型
の表示器を複数個駆動するためのマトリクス駆動
装置であつて、各表示器の共通の行(又は列)を
一斉に順次選択する切換回路と、少なくとも表示
器の個数の出力を有し各表示器の同じ位置の列
(又は行)のそれぞれに出力が接続された列数個
(又は行数個)のシリアル入力パラレル出力型の
レジスタと、そのレジスタのそれぞれに各行毎
(又は各列毎)の列(又は行)のデータをシリア
ルで送る入力手段と、切換回路およびシフトレジ
スタにクロツクパルスを送る信号回路とを具備し
た事を特徴とするマトリクス駆動装置。
A matrix driving device for driving a plurality of matrix-type displays each consisting of a plurality of rows, a plurality of columns, and light emitting elements connected between the rows and columns. A switching circuit that sequentially selects common rows (or columns) all at once, and several columns each having at least the same number of outputs as the display devices and each output connected to each column (or row) at the same position on each display device. (or several rows) of serial input/parallel output type registers, input means for serially sending column (or row) data for each row (or each column) to each of the registers, a switching circuit, and a shift register. A matrix drive device characterized by comprising a signal circuit that sends clock pulses to a matrix drive device.
JP1979057607U 1979-04-27 1979-04-27 Expired JPS6318046Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1979057607U JPS6318046Y2 (en) 1979-04-27 1979-04-27

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1979057607U JPS6318046Y2 (en) 1979-04-27 1979-04-27

Publications (2)

Publication Number Publication Date
JPS55157283U JPS55157283U (en) 1980-11-12
JPS6318046Y2 true JPS6318046Y2 (en) 1988-05-20

Family

ID=29291689

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1979057607U Expired JPS6318046Y2 (en) 1979-04-27 1979-04-27

Country Status (1)

Country Link
JP (1) JPS6318046Y2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4870498A (en) * 1971-12-23 1973-09-25

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4870498A (en) * 1971-12-23 1973-09-25

Also Published As

Publication number Publication date
JPS55157283U (en) 1980-11-12

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