公开(公告)号：US3873888A

公开(公告)日：1975-03-25

申请号：US45537274

申请日：1974-03-27

Applicant: RCA CORP

Inventor： HANCHETT GEORGE DRAPER

IPC: G09G3/18 ,  G02F1/133 ,  G04G9/00 ,  H02H3/24 ,  H02H3/50

CPC classification number: H02H3/50 ,  G02F1/13306 ,  G04G9/0047

Abstract: When the oscillator which supplies the alternating drive voltage for a liquid crystal display fails, the circuit of the present application senses this condition and in response thereto removes the operating voltage from the liquid crystal driver transistors.

Abstract translation: 当提供用于液晶显示器的交替驱动电压的振荡器失效时，本申请的电路感测到该条件，并且响应于此从液晶驱动晶体管中去除工作电压。

公开(公告)号：US3654440A

公开(公告)日：1972-04-04

申请号：US3654440D

申请日：1970-07-07

Applicant: RCA CORP

Inventor： HANCHETT GEORGE DRAPER

IPC: G04G3/02 ,  H03K21/38 ,  H03K23/66 ,  H03K21/16

CPC classification number: G04G3/02 ,  H03K21/38 ,  H03K23/667

Abstract: Multiple stage counter for counting to a value which is less than the total number of states the stages can assume. When the desired maximum count is reached, the counter switches directly back to its minimum count. During the switching between certain counts, for example from the maximum to the minimum count, a holding circuit responsive to the previous condition of one of the counter stages prevent another counter stage from assuming an undesired state.

Abstract translation: 多级计数器用于计数到小于阶段可以承担的状态总数的值。 当达到所需的最大计数时，计数器直接切换回其最小计数。 在某些计数之间的切换期间，例如从最大到最小计数，响应于其中一个计数器级的先前状态的保持电路防止另一个计数器级发生不期望的状态。