| 摘要 |
<p>PURPOSE: A liquid crystal display panel driving circuit is provided to reduce the area of a driving circuit by enabling an amp to perform a part of an analog-digital converting. CONSTITUTION: In a liquid crystal display panel driving circuit, an area resistance string part outputs analog reference voltages by different ratios according to each region. An upper region resistance string unit(211) generates highest analog reference voltage. An intermediate region resistance string unit(212) generates the analog reference voltage in the intermediate region. A subarea resistance string unit(213) generates the lowest analog reference voltage. An upper region DAC switching unit(221) is controlled by N bit digital input data.</p> |
