JPH0477453U - - Google Patents
Info
- Publication number
- JPH0477453U JPH0477453U JP12201190U JP12201190U JPH0477453U JP H0477453 U JPH0477453 U JP H0477453U JP 12201190 U JP12201190 U JP 12201190U JP 12201190 U JP12201190 U JP 12201190U JP H0477453 U JPH0477453 U JP H0477453U
- Authority
- JP
- Japan
- Prior art keywords
- data
- heating current
- circuit group
- shift register
- converted
- 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.)
- Pending
Links
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Electronic Switches (AREA)
Description
第１図は本考案による感熱ヘツド装置の一実施
例の要部ブロツク図、第２図は印刷画像の濃度の
濃淡を説明するための図である。
図中、１はシフトレジスタ、２はデータ保持部
、３はＡＮＤ回路、４および７はドライブ回路、
５は発熱抵抗体、６は１入力端子にデータ反転回
路を有するＡＮＤ回路、８は抵抗器である。
FIG. 1 is a block diagram of a main part of an embodiment of a thermal head device according to the present invention, and FIG. 2 is a diagram for explaining the density of a printed image. In the figure, 1 is a shift register, 2 is a data holding section, 3 is an AND circuit, 4 and 7 are drive circuits,
5 is a heating resistor, 6 is an AND circuit having a data inversion circuit at one input terminal, and 8 is a resistor.
Claims (1)
、画像の濃度階調に応じて各階調のデータに変換
し、このデータに基づく加熱電流をライン状に配
設した感熱ヘツドに供給し、発生する熱により受
像紙に印刷するビデオプリンタにおいて、前記変
換された各階調のデータを１ライン分ずつ記憶す
るシフトレジスタと、画像の濃度階調に基づき発
せられる加熱電流の通電指令信号と前記シフトレ
ジスタよりのデータとを処理する第１ＡＮＤ回路
群と、第１ＡＮＤ回路群よりのデータに基づく加
熱電流を通電する発熱抵抗体群と、前記通電指令
信号と前記シフトレジスタよりのデータを反転し
処理する第２ＡＮＤ回路群と、第２ＡＮＤ回路群
よりのデータに基づく加熱電流を通電する抵抗器
群とで構成したことを特徴とする感熱ヘツド装置
。 Analog video signals are converted to digital data, converted to data for each gradation according to the density gradation of the image, and a heating current based on this data is supplied to a thermal head arranged in a line. In a video printer that prints on image-receiving paper, there is a shift register that stores the converted gradation data for each line, a heating current energization command signal issued based on the density gradation of the image, and data from the shift register. a first AND circuit group that processes the above, a heating resistor group that energizes a heating current based on data from the first AND circuit group, and a second AND circuit group that inverts and processes the energization command signal and the data from the shift register. and a group of resistors that conduct heating current based on data from the second AND circuit group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12201190U JPH0477453U (en) | 1990-11-21 | 1990-11-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12201190U JPH0477453U (en) | 1990-11-21 | 1990-11-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0477453U true JPH0477453U (en) | 1992-07-07 |
Family
ID=31869816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12201190U Pending JPH0477453U (en) | 1990-11-21 | 1990-11-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0477453U (en) |
-
1990
- 1990-11-21 JP JP12201190U patent/JPH0477453U/ja active Pending
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