JPS645863A - Driver lsi of led recording head - Google Patents
Driver lsi of led recording headInfo
- Publication number
- JPS645863A JPS645863A JP16123487A JP16123487A JPS645863A JP S645863 A JPS645863 A JP S645863A JP 16123487 A JP16123487 A JP 16123487A JP 16123487 A JP16123487 A JP 16123487A JP S645863 A JPS645863 A JP S645863A
- Authority
- JP
- Japan
- Prior art keywords
- polysilicon
- resistor
- fuses
- resistors
- led
- 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
Landscapes
- Dot-Matrix Printers And Others (AREA)
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
- Fax Reproducing Arrangements (AREA)
Abstract
PURPOSE:To enable trimming of a resistor inside a driver LSI for reducing the area of a LED recording head, by forming a plurality of polysilicon resistors, a plurality of polysilicon fuses and, a plurality of pads at connecting points of the resistors and fuses, on a chip of the driver LSI. CONSTITUTION:Instead of a trimming resistor 35 exteriorly mounted on a ceramic substrate in a conventional arrangement, five polysilicon resistors 14-18 (resistance values R1-R5) and five polysilicon fuses 19-23 are arranged in parallel on the same LSI chip, with six pads 24-29 at respective connecting points between the resistors 14-18 and fuses 19-23. The resistance value of each polysilicon fuse is sufficiently smaller than that of the polysilicon resistor. The quantity of light of the LED chip having N LED elements 5 and 9 is measured so as to obtain a constant current value whereby the quantity of light of the LED chip is constant. If the constant current value is I=VR/R1, a pulse voltage is applied between the pads 24 and 25 of the resistor 14 to, for example, burn out the fuse 19, so that the value of a resistor connected to a MOS transistor 11 becomes equal to R1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16123487A JPS645863A (en) | 1987-06-30 | 1987-06-30 | Driver lsi of led recording head |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16123487A JPS645863A (en) | 1987-06-30 | 1987-06-30 | Driver lsi of led recording head |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS645863A true JPS645863A (en) | 1989-01-10 |
Family
ID=15731186
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16123487A Pending JPS645863A (en) | 1987-06-30 | 1987-06-30 | Driver lsi of led recording head |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS645863A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0315150U (en) * | 1989-06-26 | 1991-02-15 | ||
EP0434367A2 (en) * | 1989-12-18 | 1991-06-26 | Xerox Corporation | Thermal ink jet printheads |
EP0929022A1 (en) * | 1997-11-10 | 1999-07-14 | Siliconix Incorporated | Method and circuit for driving infrared-emitting diode |
-
1987
- 1987-06-30 JP JP16123487A patent/JPS645863A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0315150U (en) * | 1989-06-26 | 1991-02-15 | ||
EP0434367A2 (en) * | 1989-12-18 | 1991-06-26 | Xerox Corporation | Thermal ink jet printheads |
EP0929022A1 (en) * | 1997-11-10 | 1999-07-14 | Siliconix Incorporated | Method and circuit for driving infrared-emitting diode |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0423963A3 (en) | Temperature self-compensated time delay circuits | |
JPS645863A (en) | Driver lsi of led recording head | |
JPS5652420A (en) | Constant-current circuit | |
JPS5756945A (en) | Logic circuit | |
JPH04132275A (en) | Light emitting diode light source | |
EP0075833A3 (en) | Semiconductor-temperature sensor | |
DK271290A (en) | THERMISTOR, PRIOR TO CALCULATED TEMPERATURE MEASUREMENT, AND PROCEDURE FOR MANUFACTURING SUCH A THERMISTOR | |
JPS5758415A (en) | Conversion circuit | |
JPS57186383A (en) | Semiconductor laser device | |
DE3886048D1 (en) | POLYAMIDE COMPOSITIONS WITH HIGH IMPACT RESISTANCE AT LOW TEMPERATURES. | |
KR900003374Y1 (en) | Checking circuit of thermometer using thermistor | |
JPS57179786A (en) | Time constant substrate for timer | |
JPS5612522A (en) | Temperature detecting element | |
JPH026355Y2 (en) | ||
SU672627A1 (en) | Arrangement for overvoltage protection of load at the stabilizer output | |
JPS58191657U (en) | Multicolor light emitting element drive circuit | |
JPS5628510A (en) | Current miller circuit | |
JPS6482551A (en) | Semiconductor device | |
JPH079394Y2 (en) | Integrated circuit device for driving light emitting element | |
JPS6437847A (en) | Cml type gate array lsi | |
JPS6338181U (en) | ||
JPS59189668A (en) | Integrated circuit | |
JPS56163583A (en) | Semiconductor circuit | |
JPS57116667A (en) | Thermal head | |
KR890010940A (en) | Chip Resistor and Manufacturing Method Thereof |