CN2935359Y

CN2935359Y - Programmable copying device

Info

Publication number: CN2935359Y
Application number: CN 200620017748
Authority: CN
Inventors: 陈国翼; 曾小荣; 何志奇
Original assignee: BYD Co Ltd
Current assignee: Shenzhen Holitech Optoelectronics Co Ltd
Priority date: 2006-08-14
Filing date: 2006-08-14
Publication date: 2007-08-15
Anticipated expiration: 2016-08-14

Abstract

The utility model discloses a one-time programmable burning device, which includes a main control module, a direct current- direct current module, a sampling modulus conversion module; the sampling module is provided with a sampling input terminal used for connection with a Liquid Crystal module, the output terminal of the sampling module is connected with the output terminal of the modulus conversion module; the output terminal of the modulus conversion module is connected with the main control module, the control terminal of the direct current- direct current module is connected with the module of the main control module, the main control module has Liquid Crystal module driving port used for driving Liquid Crystal module group. Due to adopting the automatic inspection to achieve a deviation value used for calibration, to regulate manually the contrast of Liquid Crystal module continuously and to judge subjectively by people are not necessary, thus may greatly improve production efficiency, and also prevent effect of objective factors, enhance accuracy of deviation value used for calibration, greatly enhance high-quality product rate of Liquid Crystal Display and Liquid Crystal Module manufacturers.

Description

The disposable programmable burning device

[technical field]

The utility model relates to a kind of device that disposable programmable (OTP) internal memory is carried out burning of being used for, and relates to especially a kind ofly can controlling disposable programmable (OTP) burning device automatically.

[carrying on the back technology]

Present LCD﹠amp; In the problem that LCM producer is run into, liquid crystal panel is when showing, show dense and show light to be a very important problem, also to be one of maximum problem of customer complaint, the voltage distribution that liquid crystal voltage deviation that to produce this problem most important reason be LCD itself and LCD drive IC provide.In order to improve the demonstration problem of LCD liquid crystal panel, each producer method commonly used is to utilize disposable programmable OTP (one time programme) technology now, by selecting a suitable deviate (offset), and this value is cured in the internal memory of IC, thereby proofread and correct the driving voltage that finally offers LCD.But traditional OTP technology when obtaining aforementioned deviate, owing to there is the manual adjustments contrast, manually powers up and distinguishes etc. by human eye problem can make the LCD that carries out the OTP burning not reach desirable display effect.

[summary of the invention]

The utility model is for solving the manual adjustments contrast, manually powers up and problem such as distinguishes by human eye, proposes a kind of employee of minimizing operate and increase work efficiency automatic control OTP burning device with the product yield.

For this reason, the utility model proposes a kind of disposable programmable burning device, comprise main control module, DC-DC module, sampling module, analog-to-digital conversion module; Described sampling module has and is used for the sampling input end that is connected with LCM, and the output terminal of described sampling module is connected with the input end of described analog-to-digital conversion module; The output terminal of described analog-to-digital conversion module is connected with described main control module, and described DC-DC module controls end is connected with described main control module; Described main control module has the LCM that is used for driving LCM module and drives port.

Above-mentioned disposable programmable burning device, described sampling module comprise that the LCM that is used to sample shows light sensor, the sampling resistor of contrast, the two series connection, and described sampling resistor one end ground connection, the other end is connected with the input end of described D/A converter module.

The utility model is owing to adopt detection automatically to obtain the deviate of proofreading and correct usefulness, need not lean on staff constantly to regulate the contrast of LCM, need not artificially subjective contrast judge that one has improved production efficiency, two owing to avoided the influence of subjective factor, improved the precision of proofreading and correct the deviate of usefulness.

Owing to realized automatic control OTP burning technology, make the operator only need simple operations, just can realize the burning function, work efficiency improves greatly, and solved because the problem that employee's skilled operation is brought has inadequately improved the production yields of LCD and LCM producer greatly.

[description of drawings]

Fig. 1 is the utility model control system block diagram.

Fig. 2 is sampling and a change-over circuit schematic diagram in the utility model.

Fig. 3 is the utility model DC-DC change-over circuit schematic diagram.

Fig. 4 is the utility model relay circuit schematic diagram.

[embodiment]

In conjunction with the accompanying drawings the utility model is done detailed description below by specific embodiment:

As shown in Figure 1, a kind of OTP burning device, system hardware comprises: main control module 10, DC-DC module 20, sampling module 30 and analog-to-digital conversion module 40; System software comprises: interruption subroutine, data acquisition, A/D conversion routine and OTP burning program.Main control module 10 adopts the MCS-51 single-chip microcomputer, and the I/O mouth of this single-chip microcomputer is connected with DC-DC module 20 input ends, and the voltage output end of DC-DC module 20 links to each other with the burning voltage end of LCD drive IC; Sampling module 30 input ends connect LCM, and its output terminal connects main control module 10.The main control module has LCM driving port and directly is connected with LCM, and the main control module can be revised parameter by the demonstration of signal wire and data line control LCM, changes the contrast value of LCD, thereby changes the brightness of LCM.

As shown in Figure 2, sampling module adopts LLS05-A type light sensor, and the method by at light sensor output terminal resistance in series R1 becomes correspondent voltage to the brightness transition of LCM; The output terminal of sampling module 30 links to each other with the input end of analog-to-digital conversion module 40, it is the A/D change-over circuit U1 of ADC0809 that modulus passes die change piece 40 employing models, the output terminal of light sensor inserts the 26th pin of A/D change-over circuit, and the output terminal of D/A converter module 40 links to each other with the input end of main control module 10.

Please refer to Fig. 3, shown in Figure 4, DC-DC module 20 comprises DC-DC change-over circuit U2 and relay U11, change-over circuit U2 in the DC-DC module 20 selects LT1615 for use, in the burning process, I/O mouth by single-chip microcomputer comes gauge tap, during DCDC-EN-D port input high level on change-over circuit U2, change-over circuit U2 work, and output correspondent voltage.This voltage is by resistance R shown in Figure 3 16, R17 and R18 decision, V _Out=1.23* (1+ (R16/ (R17+R18))).Come the switch of control transformation circuit U 2 by program, can accurately control recordable time.As shown in Figure 4, the relay U11 in the DC-DC module 20 plays on-off action, when the coil between the

1,8 does not have energising, leads between the

pin pin

2,3, and is obstructed between the

2,4; After the energising, be obstructed between the

2,3, lead between the

2,4 that the voltage of DC-DC module 20 outputs just can be added to the OTPD end of LD drive IC like this, carries out burning.

The course of work of this OTP burning device is:

At first, before burning,, center model contrast value is read, and this value is write in the software control procedure of the present utility model, as the reference value of burning device by collection center template data.

LCM is inserted this burning device, and the OTPD end of its LCD drive IC links to each other with the output terminal of the relay U11 of DC-D module 20, and its output terminal links to each other with sampling module 30.

In main control module 10 is operating software control program on the MCS-51 single-chip microcomputer, contrast numerical value among 30 couples of LCM of sampling module is sampled, this sensor has along with intensity of illumination changes, the characteristics of photocurrent output linear change, light intensity is big more, and photocurrent is big more, utilizes this characteristic, method by at light sensor output terminal resistance in series R1 becomes correspondent voltage to the brightness transition of LCM; And this value is transferred in the analog-to-digital conversion module 40, convert voltage analog to digital quantity by the A/D change-over circuit, and send main control module 10 to and handle; After main control module 10 receives this digital quantity, by program this digital quantity and the reference value that records are before compared, continuous contrast by feedback regulation LCM, up to the contrast that obtains with center model basically identical, the relevant side-play amount of record is burnt to the LCD drive IC to corresponding offset by the OTP burning program simultaneously.

The utility model has been realized automatic control OTP burning technology, make the operator only need simple operations, just can realize the burning function, work efficiency improves greatly, and solved because the problem that employee's skilled operation is brought has inadequately improved the production yield of LCD and LCM producer greatly.

Claims

1, a kind of disposable programmable burning device is characterized in that: comprise main control module, DC-DC module, sampling module, analog-to-digital conversion module; Described sampling module has and is used for the sampling input end that is connected with LCM, and the output terminal of described sampling module is connected with the input end of described analog-to-digital conversion module; The output terminal of described analog-to-digital conversion module is connected with described main control module, and described DC-DC module controls end is connected with described main control module; Described main control module has the LCM that is used for driving LCM module and drives port.

2, disposable programmable burning device as claimed in claim 1, it is characterized in that: described sampling module comprises that the LCM that is used to sample shows photosensitive biography sensor, the sampling resistor of contrast, the two series connection, described sampling resistor one end ground connection, the other end is connected with the input end of described analog-to-digital conversion module.