CN201804536U

CN201804536U - Analog and digital signal superimposed industrial intelligent liquid crystal display

Info

Publication number: CN201804536U
Application number: CN2010201794918U
Authority: CN
Inventors: 吴晓北; 徐锐
Original assignee: HENAN UREIKA SYSTEM ENGINEERING Co Ltd
Current assignee: HENAN UREIKA SYSTEM ENGINEERING Co Ltd
Priority date: 2010-05-05
Filing date: 2010-05-05
Publication date: 2011-04-20
Anticipated expiration: 2020-05-05

Abstract

The utility model relates to an industrial intelligent liquid crystal display, in particular to an analog and digital signal superimposed industrial intelligent liquid crystal display, which comprises a CPU (computer processing unit) module, wherein the CPU module is connected with a digital signal processing module and an analog signal processing module as well as an LCD (liquid crystal display) control module; the LCD control module is connected with an LCD; and the CPU module is connected with a digital and analog signal superimposed module. The utility model solves the problems of limited application range and receiving signals of the traditional industrial liquid crystal display and relatively single function.

Description

The industrial intelligent LCD of analog and digital signal stack

Technical field

The present invention relates to a kind of industrial intelligent LCD, relate in particular to a kind of industrial intelligent LCD of analog and digital signal stack.

Background technology

Along with the continuous development of industry, the industry spot environment is just towards complicated and development in pluralism.So, for the most a part of in the industrial environment monitoring---industrial LCD requires nature also just to increase day by day.In industry spot, need most two parts of monitoring, one is the ruuning situation of commercial unit, another is the ANOMALOUS VARIATIONS of site environment.At such requirement, present industrial LCD can be divided into three kinds: first kind is passive display type.The industrial LCD of this type is more early stage product, generally adopts Micro Controller Unit (MCU) driving, is the video data of passive reception user side.Second kind is intelligent.The integrated high-speed industrial ARM7/ARM9 type CPU of the industrial LCD of this type; Built-in secondary matrix Chinese character bank; Adopt standard instruction set and preset picture; Receive control command and data by RS232,485 serial line interfaces, printer parallel port, can show colored Chinese and Western literal, Nogata figure, free curve, the BMP/JPAG image of various fonts simultaneously.The third is the AV/VGA type.The industrial LCD of this type is used for industry spot situation real time monitoring.Can compatible AV vision signal and VGA signal.Though this each have their own characteristics of industrial LCD and scope of application of three types also have self limitation.First kind and second kind of industrial LCD can only receive and the display digit signal, and the third can only receive and display simulation AV or VGA signal.

Summary of the invention

The purpose of this invention is to provide the stack of a kind of analog and digital signal the industrial intelligent LCD, it solves the limitation and the relative single problem of function of the existing industrial LCD scope of application and received signal.

For solving above-mentioned technical matters, the present invention includes: the CPU module, CPU module module connects digital signal processing module and analog signal processing module, and the CPU module connects the LCD control module, the LCD control module connects LCD, and the CPU module connects the digital and analog signaling laminating module.

The present invention combines advantage intelligent and AV/VGA type industry LCD, has realized that any switching of simulating signal and digital signal and stack show.

Description of drawings

Fig. 1 is the hardware block diagram of one embodiment of the present invention.

Fig. 2 is the program flow diagram of one embodiment of the present invention.

Fig. 3 is the control timing figure of one embodiment of the present invention.

Fig. 4 is the hyperchannel displaying principle figure of one embodiment of the present invention.

Embodiment

First kind of embodiment of the present invention comprises: CPU module as depicted in figs. 1 and 2, CPU module module connects digital signal processing module and analog signal processing module, the CPU module connects the LCD control module, and the LCD control module connects LCD, and the CPU module connects the digital and analog signaling laminating module.20 pin communication bus interfaces, touch-screen, button connects the CPU module, the CPU module connects the CPLD module, the CPLD module is as the bus control module of CPU, the analog picture signal decoding chip, the DRAM display-memory is connected the CPLD module with the LCD control interface, the analog picture signal decoding chip connects the DRAM display-memory, TFT LCD connects the LCD control interface, the analog picture signal interface connects the analog picture signal decoding chip, analog picture signal is inserted by the analog picture signal interface, and the DC/DC power module is given the CPU module, the CPLD module, analog picture signal decoding chip and communication bus interface power supply.Integrated three major parts of CPU inside modules comprise ARM9 type (S3C2440) CPU, FLASH and SDRAM.Integrated five main modular of CPLD inside modules comprise: total control module, data image signal processing module, analog and digital signal processing and laminating module, DRAM display-memory control module and LCD control module.

The software of operation following steps on the digital and analog signaling laminating module:

(1) the CPLD module has judged whether the digital signal input by the row field of scanning digital signal and the signal variation of clock signal pins.In general, even the user does not have data to send to the CPU module, the CPU module also can be behind power-up initializing, produce capable signal (HS_DIGITAL), field signal (VS_DIGITAL) and clock signal (CLOCK_DIGITAL), and data presented (DATA_DIGITAL) is zero for LCD control.

(2) the CPLD module has judged whether the vision signal input by the row field of scan video signal and the signal variation of clock signal pins.In general, even the user does not insert analog video signal, the analog picture signal decoding chip also can produce row signal (HS_VIDEO), field signal (VS_VIDEO) and clock signal (CLOCK_VIDEO), and view data (DATA_VIDEO) be zero behind power-up initializing.

(3) if scan capable signal (HS_DIGITAL), field signal (VS_DIGITAL) and the clock signal (CLOCK_DIGITAL) of digital signal, CPLD will count their frequency.According to Counter Value, produce the control signal of LCD and the read control signal of display-memory DRAM.

(4) if scan capable signal (HS_VIDEO), field signal (VS_VIDEO) and the clock signal (CLOCK_VIDEO) of decoding back picture signal, CPLD will count their frequency.According to Counter Value, produce write control signal and the LCD control signal (row signal (HS_LCD), field signal (VS_LCD) and clock signal (CLOCK_LCD)) of display-memory DRAM.

(5) CPLD is divided into write cycles and read operation cycle with the operating cycle of data.In write cycles, decoded view data is temporarily stored among the DRAM by write control signal; In the read operation cycle, read by the view data that read control signal will be temporarily stored among the DRAM.Before the read operation end cycle, the view data of reading is latched in the register of offering CPLD inside.

(6) will be latched in view data in the register and real-time numerical data and carry out exclusive disjunction, produce superposed signal (DATA_LCD).Itself and LCD control signal are sent to the LCD control interface together, realize that the stack on LCD of picture signal and digital signal shows.As shown in Figure 3, because the timesharing process of read-write operation, video data has the time-delay in an operating cycle.

As a kind of improvement of the present invention as shown in Figure 3, be connected sorter respectively on analog image process chip and the CPU module, sorter is a multiterminal interface, it can be provided with by switch and select connected any one interface and CPU and the dialogue of analog signal processing module, the monitor message (analog picture signal and digital signal) that can receive N passage supports hyperchannel to show that the switching value of sorter is controlled by CPU.One or more channel signal that CPU selects needs to show according to the instruction that button is regulated or the user sends.

Claims

1. the industrial intelligent LCD of analog and digital signal stack, comprise: the CPU module, CPU module module connects digital signal processing module and analog signal processing module, the CPU module connects the LCD control module, the LCD control module connects LCD, it is characterized in that: described CPU module connects the digital and analog signaling laminating module.