Liquid crystal display drive and control device, mobile terminal system, and data processing system

Abstract

A liquid crystal display drive and control device for reducing the number of exclusive signal interconnections for connecting a host module to a liquid crystal display driver for a sub-display, and peripheral devices, respectively. The liquid crystal display drive and control device includes, over one semiconductor substrate, a host interface circuit, a drive circuit, and an output port, and is used for connection with the host module. The drive circuit generates a drive signal for driving a liquid crystal display on the basis of information inputted to the host interface circuit before outputting. The output port is capable of controlling a logic level of an output signal on the basis of the information inputted to the host interface circuit. The liquid crystal display drive and control device is capable of distribute signals to circuits controlled by level signals with determined logic levels.

1 - 35 . (canceled) 
     
     
         36 . A liquid crystal display drive and control device adapted for use with a host device, a liquid crystal display panel, and a peripheral device, the liquid crystal display drive and control device comprising:
 a high speed serial interface circuit adapted for direct connection with the host device;   a low speed serial interface circuit adapted for connection with the host device;   a drive circuit which generates a drive signal for driving the liquid crystal display panel on the basis of information input to the host interface circuit;   an output port directly coupled to the peripheral device to control the peripheral device on the basis of the information input to the host interface circuit;   a parallel interface; and   mode terminals for receiving mode determination signals for determining which of the first serial interface circuit and the second serial circuit and the parallel interface circuit is to be used as an interface with the host device.   
     
     
         37 . A liquid crystal display drive and control device according to  claim 36 ,
 wherein the output port comprises a plurality of port terminals directly coupled to the peripheral device, and port registers, and   wherein data for deciding an output logic value of each of the port terminals to the peripheral device is set in the respective port registers.   
     
     
         38 . A liquid crystal display drive and control device according to  claim 37 , further comprising:
 a display memory for storing display data,   wherein the drive circuit generates a gate drive signal and a source drive signal for driving the liquid crystal display panel according to the display data stored in the display memory.   
     
     
         39 . A liquid crystal display drive and control device according to  claim 38 ,
 wherein the high speed serial interface circuit is adapted to directly interface with the host device, and   wherein the high speed serial interface circuit comprises differential terminals for input of serial data.   
     
     
         40 . A liquid crystal display drive and control device according to  claim 39 ,
 wherein in an operation mode which uses the high speed serial interface circuit as an interface with the host device, the host interface circuit enables information received by the high speed serial interface circuit to be output to the drive circuit.   
     
     
         41 . A liquid crystal display drive and control device adapted for use with a host device, a liquid crystal display panel, and a peripheral device, the liquid crystal display drive and control device comprising:
 a first serial interface circuit adapted for direct connection with the host device;   a drive circuit which generates a drive signal for driving the liquid crystal display panel on the basis of information input to a host interface circuit; and   an output port directly coupled to the peripheral device to control the peripheral device on the basis of the information input to the first serial interface circuit.   
     
     
         42 . A liquid crystal display drive and control device according to  claim 41 ,
 wherein the output port comprises a plurality of port terminals directly coupled to the peripheral device, and port registers, and   wherein data for deciding an output logic value of each of the port terminals to the peripheral device is set in the respective port registers.   
     
     
         43 . A liquid crystal display drive and control device according to  claim 42 , further comprising:
 a display memory for storing display data,   wherein the drive circuit generates a gate drive signal and a source drive signal for driving the liquid crystal display panel according to the display data stored in the display memory.   
     
     
         44 . A liquid crystal display drive and control device according to  claim 43 ,
 wherein the first serial interface circuit is adapted to directly interface with the host device, and   wherein the first serial interface circuit comprises differential terminals for input of serial data.   
     
     
         45 . A liquid crystal display drive and control device according to  claim 44 ,
 wherein the host interface circuit further comprises:   a parallel interface circuit; and   a plurality of mode terminals for receiving mode determination signals for determining which of the first serial interface circuit and the parallel interface circuit is to be used as an interface with the host device.   
     
     
         46 . A liquid crystal display drive and control device according to  claim 45 ,
 wherein in an operation mode which uses the first serial interface circuit as an interface with the host device, the host interface circuit enables information received by the first serial interface circuit to be output to the drive circuit.