HSINCHU, Taiwan, April 6 /Xinhua-PRNewswire-FirstCall/ -- AU Optronics Corp. (''AUO'' or the ''Company'') (TAIEX: 2409; NYSE: AUO) today announced preliminary consolidated net sales of NT$14,618 million and unconsolidated net sales of NT$14,596 million for the month of March 2005.

Preliminary shipments of large-sized panels(a) for applications such as desktop monitor, notebook PC, LCD TV, and other applications, broke the two million mark in March 2005 to set a new record of 2.33 million, up 29.1% from the previous month. Shipments of small- and medium-sized panels increased by 23.4% M-o-M to reach 3.39 million.

(a) Large size refers to panels that are 10 inches and above in diagonal measurement while small & medium size refers to those below 10 inches

Unaudited consolidated revenues for the month of March 2005 increased by 26.9% sequentially, while unconsolidated net sales rose 26.8%. On a year-over-year basis, March 2005 consolidated revenues decreased by 3.2%, while unconsolidated net sales increased 4.8%. For the first three months ended March 31, 2005, preliminary consolidated and unconsolidated revenues amounted to NT$38,837 million and NT$38,796 million, while preliminary shipments of large-sized panels and small- and medium-sized panels totaled 6.04 million and 8.64 million, respectively.

Sales Report: (Unit: NT$ million) Net Sales(1) (2) Consolidated(3) Unconsolidated March 2005 14,618 14,596 February 2005 11,517 11,511 M-o-M Growth 26.9 % 26.8 % March 2004 15,098 13,921 Y-o-Y Growth -3.2 % 4.8 % January to March 2005 38,837 38,796 October to December 2004 39,495 39,480 Q-o-Q Growth -1.7 % -1.7 % (1) All figures are prepared in accordance with generally accepted accounting principles in Taiwan. (2) Monthly figures are unaudited, prepared by AU Optronics Corp. (3) Consolidated numbers include AU Optronics Corporation, AU Optronics (L) Corporation, and AU Optronics (Suzhou) Corporation. ABOUT AU OPTRONICS

AU Optronics Corporation (''AUO'') is the world's third largest manufacturer of large-size thin film transistor liquid crystal display panels (TFT-LCD), dominating approximately 13.6%(1) of global market share and generated net income of NT$168.1Billion (US$5.3 bn)(2) in 2004. AUO currently operates one 6th-generation, one 5th-generation, one 4th-generation, and three 3.5-generation TFT- LCD fabs, in addition to four module assembly facilities and a R&D fab. specializing in low temperature poly silicon TFT and organic LED. Currently the most widely used flat panel display technology, AUO is one of few top-tier TFT-LCD manufacturer globally, able to offer a wide range of small to large sized (1.5''-46'') TFT-LCD display panels, which puts it in a unique position to service clients of diversified product applications.

(1) Display Search September 2004 Report (2) Unaudited consolidated and converted to USD by using Fed Noon FX Rate dated December 31st, 2004 of NT$31.74 : US$1 For more information, please contact: Yawen Hsiao, Corporate Communications Dept., AU Optronics Corp. Tel: +886-3-500-8899 x3211 Fax: +886-3-577-2730 Email: yawenhsiao@auo.com

CONTACT: Yawen Hsiao of AU Optronics Corp., +886-3-500-8899 x3211, or
fax, +886-3-577-2730, or yawenhsiao@auo.com