CN2426255Y - Indication structure simplified Chinese pager - Google Patents

Abstract

The utility model relates to an indication structure simplified Chinese pager which is composed of a high-frequency receiving plate and a Chinese logic plate by connection. The high-frequency receiving plate is a universal high-frequency receiving plate in the prior art. The structure of the utility model is characterized in that the Chinese logic plate is composed of a CPU chip, and a decoder chip, an address code chip, a character library memory ROM, a memory RAM, a power source circuit, a liquid crystal display LCD, a motor and a buzzer which are respectively connected with the CPU chip. An LCD driver is arranged in the CPU chip which is provided with an output line which is externally connected with the liquid crystal display LCD and drives the liquid crystal display LCD. System software is arranged in the CPU chip. The pager can accomplish the dynamic assignment of information space by the system software. A 12*12 or a 14*14 dot matrix font is arranged in the character library memory ROM. The utility model has the advantages of low cost and small volume.

Description

A kind of Chinese pager of simplifying display structure

The utility model relates to a kind of Chinese pager, and particularly a kind of Chinese pager of simplifying display structure belongs to the radio paging receiver technical field.

No matter the Chinese radio pager of people's use at present is low speed or high speed, its display part all adopts LCD to show module, described demonstration module is formed by connecting by display driver circuit and LCD plate LCD, this demonstration module mainly relies on external import, price is rather stiff, the LCD of general single file shows that the price of module is at 5～6 dollars, the LCD of duplicate rows shows that the price of module is at 6～8 dollars, almost account for 40% of Chinese pager logic card cost, therefore there is following shortcoming in the Chinese pager of prior art: (1) whole cost height, structure is complicated, and product is difficult for miniaturization; (2) owing to adopt LCD to show module, make the annexation complexity of peripheral components, influenced the wireless performance index of product.

The purpose of this utility model is in order to overcome prior art Chinese pager display part complex structure, volume is big, cost is high shortcoming, and a kind of Chinese pager of simple in structure, simplification display structure that volume is little, with low cost is provided.

The purpose of this utility model can reach by taking following measure: a kind of Chinese pager of simplifying display structure, be formed by connecting by high frequency dash receiver and Chinese logic card, the high frequency dash receiver is the general high frequency dash receiver of prior art, by antenna, high-frequency amplifier, first local oscillator, first intermediate-frequency filter, intermediate frequency amplifier, second local oscillator, second intermediate-frequency filter, frequency discriminator, baseband signal generator is formed by connecting, its signal flow is to being antenna → high-frequency amplifier → first local oscillator → first intermediate-frequency filter → intermediate frequency amplifier → second local oscillator → second intermediate-frequency filter → frequency discriminator → baseband signal generator, the output of baseband signal generator connects the signal input part of Chinese logic card, its design feature is: Chinese logic card is by cpu chip and the decoder chip that is connected with cpu chip respectively, the address code chip, the character library rom memory, memory RAM, power circuit, LCD plate LCD, motor, buzzer is formed by connecting, built-in lcd driver in the cpu chip, and being provided with output line external and driving LCD plate LCD, described output line connects the incoming line of LCD plate LCD; Built-in system software in the cpu chip, by the practicable information space dynamic assignment of this systems soft ware beep-pager, can be according to the length dynamic assigning memory space that receives information character; Character library rom memory built-in 12 * 12 or 14 * 14 dot-matrix fonts.

The purpose of this utility model also can reach by taking following measure:

Memory RAM is built in the cpu chip.

Memory RAM, character library rom memory are built in the cpu chip.

Outside display circuit of the present utility model is made up of common LCD LCD plate, show that complex structure, expensive drive unit are built in the cpu chip in the module, therefore overall structure of the present utility model is simple, volume is little, not only greatly reduces cost but also has improved the stability of performance.Employed cpu chip, except function and resource with general 8 single-chip microcomputers, the terminal that also includes large-scale lcd driver and corresponding external general LCD display piece also should possess suitable static memory simultaneously to satisfy the requirement of Chinese pager storage information.

In order to show more Chinese characters under the situation of certain driving dot matrix quantity and LCD display piece area, the utility model increases the demonstration quantity of Chinese character by the method for setting up 12 * 12 or 14 * 14 dot-matrix fonts.Principle is as follows: though by rational LCD line, the line that can solve LCD limits the influence that brings, and can not solve the problem that LCD drives the dot matrix deficiency that includes.Generally speaking, the type matrix that Chinese character shows is to be made of 16 * 16 dot matrix, and promptly a Chinese character shows and must show with 16 * 16 dot matrix that 256 points are formed.

Generally, the com line that lcd driver had that includes among the CPU 16～18, the seg line is between 65～75, the dot matrix number that can drive is between 1170～1250, calculate by 256 points of each Chinese character, 16 * 16 dot matrix Chinese characters that can drive mostly are 4 most, can't satisfy the demonstration needs of Chinese pager at all.

Adopt the type matrix of 12 * 12 dot matrix or 14 * 14 type matrix, reduce counting that each Chinese character takies, make the number increase of the Chinese character that can show.

Lcd driver with 18 * 65 is an example, the Chinese character number such as the following table that adopt the Chinese character of different type matrixes to show:

LCD：18com×16seg=1170

Use type matrix	16×16	14×14	12×12
				Show the Chinese character number	4.5 it is individual	5.9 it is individual	8.1 it is individual

Adopt 12 * 12 or 14 * 14 dot matrix, can increase the demonstration amount of Chinese character, thereby the Chinese character quantity display requirement that can adapt to Chinese pager, because Chinese character is a pictograph, the GB2312-80 that beep-pager is supported, also quantity is few for Chinese character commonly used, and stroke is comparatively simple, adopts the identification that 12 * 12 dot matrix show not to be influenced Chinese character.In the computer Chinese operating system that uses at present, also much use or support 12 * 12 dot matrix Chinese characters.

The technical characterstic of software design aspect:

The utlity model has following several characteristics:

(1) because baroque display driver is built among the CPU, so the utility model overall structure is simple, external device is few, volume is little, and cost is low.

(2) 12 * 12 dot-matrix fonts are applied in the beep-pager, under the condition of the LCD of identical size LCD plate, show more Chinese characters; The hypervisor of display part is primarily aimed at 12 * 12 dot-matrix fonts and designs.

(2) in order to save cost, the utility model omits abduction RAM, utilize management software reasonable distribution ram space, specific practice is: adopt information storage space dynamic assignment, do not limit the length of every information, promptly how long an information has, and the RAM that promptly distributes corresponding size is for its storage, as long as be no more than the total capacity in whole information storage district.Article one, information more only distributes its needed space for its storage, and remaining space is used for storing out of Memory, has improved the utilance of internal memory like this.

Below in conjunction with accompanying drawing the utility model is described in detail:

Fig. 1 is the structured flowchart of the utility model embodiment 1.

Fig. 2 be the utility model embodiment 1 logic card electrical schematic diagram.

Fig. 3 is the utility model main program flow chart.

Fig. 4 is the flow chart of the utility model function subprogram.

Fig. 5 is the electrical schematic diagram of the utility model embodiment 2.

Fig. 1, Fig. 2 constitute embodiment 1 of the present utility model.As can be seen from Figure 1, present embodiment is formed by connecting by high frequency dash receiver and Chinese logic card, the high frequency dash receiver adopts the high frequency dash receiver of the common Chinese pager of prior art, is formed by connecting by antenna 1, high-frequency amplifier 2, first local oscillator 3, first intermediate-frequency filter 4, intermediate frequency amplifier 5, second local oscillator 6, second intermediate-frequency filter 7, frequency discriminator 8, baseband signal generator 9; The Chinese logic card is formed by connecting by cpu chip 10 and the decoder chip 11 that is connected with cpu chip 10 respectively, address code chip 12, character library rom memory, memory RAM, power circuit 13, LCD plate LCD, motor 14, buzzer 15; The output of described baseband signal generator 9 connects the signal input part of decoder chip 11.

As can be seen from Figure 2, the present embodiment logic card is by decoding chip U1, read-only memory U2, address chip U4, the Controlled CPU chip U5 of central authorities, voltage comparator chip U6, electric pressure converter chip U7, voltage comparator chip U8 and LCD plate LCD are formed by connecting, built-in lcd driver 16 and memory RAM in the described cpu chip 10, described cpu chip 10 is provided with the output line of external LCD plate LCD, described output line connects and driving LCD plate LCD, cpu chip 10 built-in system softwares, the practicable information space dynamic assignment of this systems soft ware, according to the length dynamic assigning memory space, character library rom memory built-in 12 * 12 or 14 * 14 dot-matrix fonts that receive information character.Wherein:

U1: be decoder, radio call information is amplified through dash receiver, mixing, filtering becomes baseband signal, sends into the 8th pin of decoder, if the information that has the address to conform to, 15,16,17 pin through decoder adopt the serial method of synchronization to send into CPU, when receiving address code, 15 pin become low level, send to CPU and interrupt application, after CPU is ready to, 16,17 pin are sent into CPU with the information that receives with the serial method of synchronization, and 16 steps are data, and 17 pin are clock.X201 is a decoder clocks, and frequency is 76.8KHz;

U2: be read-only memory, be used to deposit numeral, Chinese demonstration type matrix;

U4: be the address chip, any beep-pager all has a plurality of paging codes, and promptly address code leaves in this chip exactly, and this chip is a serial EEPROM, capacity 1Kbit.Whenever beep-pager start or reset, CPU reads the address code data of beep-pager from this chip, and sends in the decoder;

U5: be cpu chip, this CPU except that possessing cpu function, also integrated widget and lcd driver, the software of beep-pager just is included among the CPU, in order to finish every function of beep-pager, this CPU has doubleclocking, X301 and X302.X301 generally is 32768Hz.X302 is 2MHz, and as clock, power consumption is extremely low with X301 for CPU under the usual state, when carrying out various complex process, switches to X302 people for work clock, has so just reached purpose of power saving.CPU has finished message pick-up, has stored, has consulted, shown and has driven the function of buzzer and the warning of motor oscillator, by monitoring the state of 4 buttons, finish inner various processing,, directly connect liquid product display piece by the row, column line because CPU has included lcd driver;

U6: be a voltage comparator, finish the electrification reset operation of CPU;

The U7:CD-DC electric pressure converter becomes the 3.0V power supply with the 1.5V power source conversion of dry cell, for whole beep-pager logic card provides working power;

U8: voltage comparator, in order to detect the voltage of beep-pager battery, when the beep-pager battery was lower than 1.0V, low level of first pin output was advanced CPU, when CPU detects this low level, sends the low-voltage alarm signal.

Common LCD plate LCD is adopted in the display part, and is directly connected to the row, column line of lcd driver among the CPU;

EL is a backlight, can illuminate LCD, conveniently reading information under dark surrounds.

Present embodiment also has out-of-limit prompt facility: when synchronous code that the beep-pager system of receiving sends, and the 18th pin of U1 output high level, when can not receive synchronous code in 256 seconds, this pin becomes low level, sends out-of-limit prompting to CPU.

The management software flow chart of present embodiment as shown in Figure 3, Figure 4.

Fig. 1, Fig. 5 constitute embodiment 2 of the present utility model.As can be seen from Figure 5, memory RAM and character library rom memory all are built in the cpu chip in the present embodiment.The management software flow chart of present embodiment as shown in Figure 3, Figure 4, all the other are with embodiment 1

Below with logic card cost of the present utility model and Taiwan China silicon company Chinese machine logic card

Cost is (only contain main devices, other identity unit is ignored) relatively

The utility model scheme		Taiwan China silicon scheme
				Device name	Unit price (dollar)	Device name	Unit price (dollar)
CPU	3.5	CPU ÷ decoder	2.5
				Decoder	1.1	(PCU includes)
LCD (containing interface unit)	0.65	The LCD module	5.0
				ROM	0.75	RAM+ROM	2.5
Printed circuit board (PCB) (same homalographic)	0.7	Printed circuit board (PCB)	0.2
				TOTAL	6.7	TOTAL	10.2

As can be seen from the above table, the utility model scheme and Taiwan China silicon company scheme is compared, and has 3.5 dollars price advantage.

Claims (3)

1. Chinese pager of simplifying display structure, be formed by connecting by high frequency dash receiver and Chinese logic card, the high frequency dash receiver is the general high frequency dash receiver of prior art, by antenna (1), high-frequency amplifier (2), first local oscillator (3), first intermediate-frequency filter (4), intermediate frequency amplifier (5), second local oscillator (6), second intermediate-frequency filter (7), frequency discriminator (8), baseband signal generator (9) is formed by connecting, its signal flow is to being antenna (1) → high-frequency amplifier (2) → first local oscillator (3) → first intermediate-frequency filter (4) → intermediate frequency amplifier (5) → second local oscillator (6) → second intermediate-frequency filter (7) → frequency discriminator (8) → baseband signal generator (9), the output of baseband signal generator (9) connects the signal input part of Chinese logic card, it is characterized in that: Chinese logic card is by cpu chip (10) and the decoder chip (11) that is connected with cpu chip (10) respectively, address code chip (12), the character library rom memory, memory RAM, power circuit (13), LCD plate LCD, motor (14), buzzer (15) is formed by connecting, built-in lcd driver in the cpu chip (10), and being provided with output line external and driving LCD plate LCD, described output line connects the incoming line of LCD plate LCD; Built-in system software in the cpu chip (10), by the practicable information space dynamic assignment of this systems soft ware beep-pager, can be according to the length dynamic assigning memory space that receives information character; Character library rom memory built-in 12 * 12 or 14 * 14 dot-matrix fonts.

2. a kind of Chinese pager of simplifying display structure according to claim 1 is characterized in that: memory RAM is built in the cpu chip (10).

3. a kind of Chinese pager of simplifying display structure according to claim 1 is characterized in that: memory RAM, character library rom memory are built in the cpu chip (10).

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