发明名称 |
Light emitting element array chip and print head |
摘要 |
To achieve a reduction in the size of the print head and a reduction in the cost. Means for achieving the object LED array chips 1 achieved by matrix-connecting MxN LED elements 2 with M pad electrodes to be scanned 4 and N pad electrodes to be driven 3 and LED array drive ICs 10 are mounted at a mounting substrate 41. The pad electrodes to be driven 3 are connected with drive pad electrodes 16 and the pad electrodes to be scanned 4 are connected with scan pad electrodes 17 through wires 42a and 42b respectively. The pad electrodes to be driven 3 and the pad electrodes to be scanned 4 are provided in a single row along one side of the lengthwise side of the chip. The LED array drive ICs 10 are provided with a scan control unit that sequentially validates the M pad electrodes to be scanned 4 one at a time based upon a scan signal and a data control unit that supplies drive currents to the N pad electrodes to be driven 3 in conformance to individual sets of data to cause N LED elements 2 connected with a valid pad electrode to be scanned 4 to emit light, each time the valid pad electrode to be scanned 4 is switched. <IMAGE>
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申请公布号 |
EP0889435(A2) |
申请公布日期 |
1999.01.07 |
申请号 |
EP19980305088 |
申请日期 |
1998.06.29 |
申请人 |
OKI DATA CORPORATION |
发明人 |
TOKURA, KAZUO;NAKAMURA, YUKIO;OGIHARA, MITSUHIKO;TANINAKA, MASUMI |
分类号 |
B41J2/44;B41J2/45;B41J2/455;G06K15/12;H01L33/08;H04N1/036;(IPC1-7):G06K15/12 |
主分类号 |
B41J2/44 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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