公开(公告)号：JPH06334522A

公开(公告)日：1994-12-02

申请号：JP11445093

申请日：1993-05-17

Applicant: IBM

Inventor： YASUDA HIROAKI ,  INOUE KOJI ,  HAYATA MASAYUKI

IPC: H03M1/18 ,  H04N5/14

Abstract: PURPOSE: To easily and optimally adjust the values of upper limit and lower limit reference voltages to be set in an A/D converter by user himself, without requiring a special device and to optimally A/D-convert only an original gradation part, even in an analog video signal provided with a blanking pedestal. CONSTITUTION: This device is constituted by providing lower limit and upper limit reference voltage adjusting circuits 10 and 12 for setting the lower limit and upper limit reference voltages of the A/D converter 4, where an analog video signal provided with a black level and a white level is inputted, an A/D output check circuit 14 for feeding-back a digital signal output from the A/D converter 4 and detecting the change point of time, when the level of the digital signal output is changed into the black level or the white level so as to output a detecting signal and a reference voltage adjustment control circuit 16 for supplying the upper limit and the lower limit reference voltages at the change point of time to the upper limit and the lower limit reference voltage adjusting circuit as the upper limit and lower limit reference voltage values according to the detecting signal.

公开(公告)号：JP2006208575A

公开(公告)日：2006-08-10

申请号：JP2005018326

申请日：2005-01-26

Applicant: Internatl Business Mach Corp ,  インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Maschines Corporation

Inventor： INOUE KOJI ,  KODATE MANABU ,  ISHII KEITA ,  KATAOKA RIEKO

IPC: G09G3/36 ,  G02F1/133 ,  G09G3/20 ,  H04N5/66

CPC classification number: G09G3/3611 ,  G09G5/06 ,  G09G2320/028 ,  G09G2320/0285 ,  G09G2320/068

Abstract: PROBLEM TO BE SOLVED: To provide an information processor in which adjusting effect of a viewing angle width is improved by controlling gradation of a liquid crystal display (LCD) device, a display control method, and a program for executing the display control method with which a viewing angle characteristic is controlled.
SOLUTION: The information processor includes second software for forwarding display control of the LCD panel from a CPU 12 to first software after receiving a display mode change instruction, and a plurality of display control table 38 in which color pallet data of less than 128 gradation levels are allocated with degeneration for a higher gradation level. From an identification data of the LCD panel which is acquired by the first or the second software to which the control is forwarded, a degeneration color conversion table corresponding to the identification data is retrieved. A display adapter 30 reads out the degeneration color conversion table retrieved from a display control table storing section 36 to a look-up-table (LUT) reading section 40 and generates an RGB signal in which the gradation is degenerated.
COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：提供一种信息处理器，其中通过控制液晶显示器（LCD）装置的等级来提高视角宽度的调整效果，显示控制方法和用于执行显示控制的程序 控制视角特性的方法。 解决方案：信息处理器包括第二软件，用于在接收到显示模式改变指令之后将CPU面板的LCD显示控制转发到第一软件;以及多个显示控制表38，其中彩色托盘数据小于 128级灰度级别被分配用于较高灰度级的退化。 从由控制转发到的第一软件或第二软件获取的LCD面板的识别数据，检索对应于识别数据的退化颜色转换表。 显示适配器30将从显示控制表存储部分36检索的退化颜色转换表读出到查找表（LUT）读取部分40，并产生灰度退化的RGB信号。 版权所有（C）2006，JPO＆NCIPI