CN1412570A

CN1412570A - CGROM detection device and method

Info

Publication number: CN1412570A
Application number: CN 01136445
Authority: CN
Inventors: 林仕哲
Original assignee: Wintek Corp
Current assignee: Wintek Corp
Priority date: 2001-10-17
Filing date: 2001-10-17
Publication date: 2003-04-23
Anticipated expiration: 2021-10-17
Also published as: CN1178068C

Abstract

The present invention discloses a CGROM detection device and its method. It includes machine body, probe module and circuit module, in which the interior of the machine body has EPRO for storing font material of predefined character, and has first IC with the functions of comparing material and recording material and second IC with the functions of signal output and control. It can utilize probe module to receive output signal of CGROM of IC on the PCB plate, and can use unalogue multitask election circuit of circuit module to make data selection, and use A/D converter circuit to make signal conversion so as to make first IC can implement comparision of material by using identical font material standard and make second IC output compared result.

Description

A kind of CGROM pick-up unit and method

Technical field

The present invention relates to a kind of character type control its inner CGROM of IC (character generation ROM (read-only memory)) pick-up unit and method that display frame shows that drive, relate in particular to a kind of font data that detects character in the interior burning in advance institute desire of EPROM, with control IC on the pcb board to be measured, a CGROM output character data that it is inner and an IC receive the data of EPROM and compare, to judge whether its CGROM of IC on this pcb board is certified products.

Technical background

The in use shown character of existing LCM (LCD MODULE) has the incomplete situation that shows, its CGROM of control IC (CharacterGenerator Read Only Memory in the common LCM for this reason of this kind situation, being that character produces ROM (read-only memory)) quality problems are caused, the problem that the quality problems of CGROM are then normally derived because complete detection CGROM is not done by IC manufacturing plant, and the existing method that detects basic employing based on visual detection; Generally speaking the built-in character of CGROM is about about 180～240, make this LCM (LCD MODULE) show that a plurality of kinds of characters constitute a picture, and be example with 5 * 7 character, each character is divided into 35 blockages, if each character is desired to inspect complete, then each blockage of each character all needs to inspect with range estimation, a common picture has several to the dozens of kinds of characters, so promptly need spend several seconds to tens of seconds time just can inspect a picture, and under the situation about all need inspect with a plurality of pictures, then usually essential cost a few minutes, just can inspect completely, it is very slow therefore it to be inspected speed.In addition, conduct a survey in artificial visual mode, the easier generation because of the tired of erroneous judgement and eyes checked incomplete situation.

Summary of the invention

Technical matters to be solved by this invention provides a kind of apparatus and method that can detect automatically CGROM, its detection efficiency height, and good reliability, and can reduce testing staff's labour intensity greatly.

In order to realize the foregoing invention purpose, the present invention system provides a kind of CGROM pick-up unit and method, and it comprises:

One body, be provided with an EPROM in this body, the built-in font data that is equipped with a plurality of book characters of this EPROM, the data of this EPROM are output to an IC with data comparison and data memory function, and an IC connects and drives the 2nd IC with signal output and control function;

One probe module, it is to be connected to the 2nd IC, and is controlled by the 2nd IC; This probe module has one can be in conjunction with the location-plate of a pcb board, one side of this location-plate has protruded out a plurality of SEG signal probes and a plurality of COM signal probe, these a plurality of SEG signal probes and this a plurality of COM signal probes can touch a plurality of sensing points that this pcb board has respectively, have a control IC in addition on this pcb board, its inside of this control IC has the CGROM that a control character shows;

One circuit module, it has a simulation multitask and selects a circuit and an analog-to-digital conversion circuit, it is a plurality of SEG signal probes and an IC of this body and the signal of the 2nd IC that receives this probe module that circuit is selected in this simulation multitask, wherein these a plurality of SEG signal probes all are divided into many group probes, be connected respectively to this analog-to-digital conversion circuit, and being these a plurality of COM signal probes of connection, this analog-to-digital conversion circuit is used to receive the drive signal that this CGROM produces, and drive this simulation multitask with an IC and select circuit and this analog-to-digital conversion circuit that the conversion of signals that receives is become digital signal, and be delivered to an IC and carry out the comparison of data.

Owing to adopt above-mentioned detection method and device, at first be after each character conversion that the institute desire detects is become seven eight hexadecimal data, then with the burning in advance of these data in EPROM, make display frame show the character of the CGROM that institute's desire detects by the IC on the driving PCB plate, use this moment probe to survey COM on the pcb board and the sensing point of SEG is obtained simulating signal, then this simulating signal is selected the sequence selection of circuit and the conversion of analog-to-digital conversion circuit through this simulation multitask, convert digital signal to, compare via the data of an IC again, with the character of differentiating this CGROM whether problem is arranged, the reviewer can be at an easy rate at light, in sound or the picture that demonstrates, whether its CGROM of IC that determines this pcb board has problem, therefore the checkout procedure of a slice pcb board only needs the several seconds to finish, can save the expenditure of manpower, can finish work for inspection fast again, the situation that more can reduce artificial erroneous judgement takes place.

Description of drawings

Fig. 1 is an arrangement plan of the present invention

The pcb board schematic rear view that Fig. 2 surveys for the present invention, the CGROM that wherein controls among the IC represents with perspective fashion

Fig. 3 is testing process figure of the present invention.

Fig. 4 logical operation process flow diagram of the present invention.

Fig. 5 A is partial circuit figure of the present invention, and wherein the part of Xian Shiing is an IC part.

Fig. 5 B is partial circuit figure of the present invention, and wherein the part of Xian Shiing is the 2nd IC and EPROM part.

Fig. 5 C is partial circuit figure of the present invention, and wherein the part of Xian Shiing is the probe module part.

Fig. 5 D is partial circuit figure of the present invention, and wherein the display part is the circuit module part.

Fig. 6 detects the synoptic diagram of A, B, C character for the present invention.

Fig. 7 detects A, B, C character for the present invention, and wherein the B character is wrong synoptic diagram.

Fig. 8 detects the synoptic diagram that demonstrates this error character behind the error character in an embodiment for display frame of the present invention

Further describe embodiments of the invention below in conjunction with accompanying drawing, in Fig. 1,2,3,4,5A, 5B, 5C, 5D, the present invention includes:

One body 10, be provided with an EPROM11 in this body 10, (be ErasableProgrammable Read Only Memory, the ROM (read-only memory) that can erase and can plan adopts the IC of 27C512 in this enforcement), an IC12 (present embodiment adopts 8051 IC) and one the 2nd IC13 (present embodiment adopts 8255 IC); Wherein, the built-in font data that is equipped with most book characters of this EPROM11, the data of this EPROM11 may be output to an IC12, and an IC12 has data comparison and data memory function, and controlled by the keying of a switch 14, and an IC12 links the 2nd IC13, and the 2nd IC13 has signal output and control function;

A probe module 20 is connected to the 2nd IC13, and is controlled by the 2nd IC13; This probe module 20 has a location-plate 21, this location-plate 21 can be in conjunction with a pcb board 40, one side of this location-plate 21 has protruded out 15 SEG signal probe s1～s15 and seven COM signal probe c1～c7, these 15 SEG signal probe s1～s15 and seven COM signal probe c1～c7 can be plugged into last 22 of this pcb board 40 (the present invention selects a printed circuit board for use) respectively and form poroid sensing point 41, this pcb board 40 can be in conjunction with a display frame 42 to form LCM (being so-called LCD MODULE), has a control IC44 on this pcb board 40, have one on this control IC44 in order to drive the CGROM43 of this display frame 42, and this pcb board 40 can be accepted the 2nd IC13 control, and demonstrates book character in this display frame 42;

One circuit module 30, it has a simulation multitask and selects a circuit 31 and an analog-to-digital conversion circuit 32, it is 15 SEG signal probe s1～s15 and an IC12 of body 10 and the signal of the 2nd IC13 that receives this probe module 20 that circuit 31 is selected in this simulation multitask, wherein these 15 SEG signal probe s1～s15 be divided into for s1～s5 be first group of probe SA, s6～s10 is that second group of probe SB and s11～s15 are totally three groups of the 3rd group of probe SC etc., be connected to this simulation multitask respectively and select circuit 31, and select SA by the signal controlling of an IC12 and the 2nd IC13, SB, the signal of which group probe of SC can input to analog-to-digital conversion circuit 32, this analog-to-digital conversion circuit 32 is and receives seven COM signal probe c1～c7 of this probe module 20, and this analog-to-digital conversion circuit 32 becomes digital signal with the conversion of signals that receives, and is passed to an IC12 and carries out the comparison of data; In addition on this circuit module 30 and be provided with a green light 33, a red light 34 and a hummer 35 that drives by the 2nd IC3 respectively, wherein this green light 33 and red light 34 are to make with LED (light emitting diode) respectively.

In Fig. 3,4,5A, 5B, 5C to 5D figure, after the character conversion of predetermined detection of the present invention becomes seven eight hexadecimal data, with the burning in advance of this data in this EPROM11; And this pcb board 40 is incorporated into this probe module 20, open switch 14 again, make an IC12 drive the 2nd IC13, make the 2nd IC13 drive the display frame 42 of this pcb board 40 again, to demonstrate the character that desire detects, utilize these 15 SEG signal probe s1～s15 and this seven COM signal probe c1～c7 surveying the sensing point 41 on this pcb board 40 respectively, and so as to obtaining seven COM signals and 15 SEG signals that are divided into three groups every group five; Display mode system according to the LCM display module shows prior to the c1 row in addition, c2 is listed as again ... to c7 row (as Fig. 3, shown in Figure 4, and please cooperate shown in Figure 6), each second 60 demonstrations of repetitive cycling (present embodiment is example with 60Hz) according to this, and before showing, exports each row the signal of a logic0 earlier, this signal is transferred to this analog-to-digital conversion circuit 32 through these seven COM signal probe c1～c7, and be sent to an IC12, when the signal that receives first COM as an IC12 is logic0, and by an IC12 calculation times, an IC12 then controls the SEG signal that this simulation multitask selects circuit 31 that first group of probe SA recorded and sends this analog-to-digital conversion circuit 32 simultaneously to simultaneously, and this SEG conversion of signals become digital signal, and be sent among the IC12 and compare with the data of this EPROM11, if data is identical, promptly carrying out this simulation multitask by IC12 control selects the measured SEG signal of circuit 31 these second group of probe SB of control to enter this analog-to-digital conversion circuit 32, and convert digital signal to, enter the data comparison of carrying out among the IC12 with this EPROM11 again; If the data difference (that is testing result is wrong) of comparison, then earlier this document is recorded among the IC12, controlling this simulation multitask by an IC12 then selects circuit 31 to send the 3rd group of measured SEG signal of probe SC to this analog-to-digital conversion circuit 32 to change into digital signal, and in an IC12, carry out comparing with the data of this EPROM11, in having compared this three groups of probe SA, SB, behind the SC, then wait for when the signal that receives this second COM up to an IC12 is logic0, then repeat above-mentioned detection, when the signal that receives the 7th COM until an IC12 is logic0 by that analogy, after repeating above-mentioned detection and finishing, 3 CGROM characters have promptly been detected.And after number of times that an IC12 is added up surpasses seven times (by the N=N+1 of the 4th figure, ≤ 8 whether N compare), promptly carry out the detection that following three characters repeat aforementioned manner, after treating that all characters detections finish, if it is all correct that the CGROM43 of this pcb board 40 drives the character that shows, promptly an IC12 can drive the 2nd IC13, and is driven the display frame 42 of this pcb board 40 by the 2nd IC, in this display frame 42, demonstrate predetermined character, as: CGROM OK; And it is luminous to make the 2nd IC13 drive this green light 33, is the intact person of a quality with the CGROM43 that shows this pcb board 40.If this CGROM43 inside is wrong, then an IC12 can drive the 2nd IC13, and drives the display frame 42 of this pcb board 40 by the 2nd IC, demonstrates wrong character in this display frame 42, as: A; And make the 2nd IC13 drive luminous and this hummer 35 of this red light 34 to pipe three, wrong with the quality of representing this CGROM43, must classify substandard product as.

Be to detect in the present embodiment " A ", " B ", " C " three characters, each character is divided into 5 * 7 squares (seeing also shown in Figure 6) when showing, and each row of this first character A character are represented with the formula of eight-digit binary number: and c1 is listed as: 00000100, the c2 row: 00001010, the c3 row: 00010001, the c4 row: 00010001, the c5 row: 00011111, the c6 row: 00010001, the c7 row: 00010001.And each row of this second character B character are represented with the formula of eight-digit binary number: the c1 row: 00011110, the c2 row: 00010001, the c3 row: 00010001, the c4 row: 00011110, the c5 row: 00010001, the c6 row: 00010001, the c7 row: 00011110.And each row of the 3rd character C character are represented with the formula of eight-digit binary number: the c1 row: 00001110, the c2 row: 00010001, the c3 row: 00010000, the c4 row: 00010000, the c5 row: 00010000, the c6 row: 00010001, the c7 row: 00001110.Then with above-mentioned 3 characters, the font data of seven eight-digit binary numbers of each character, the font data burning in advance of 21 eight-digit binary numbers is in EPROM11 altogether.

If now display frame 42 demonstrates as shown in Figure 7 " A ", " B ", " C ", wherein " B " font incorrect.And when these seven signals that COM signal probe c1～c7 obtains, after converting digital signal to, this analog-to-digital conversion circuit 32 of process inputs to an IC12, and when an IC12 judges first COM signal and is logic0, prepare this moment the c1 row are done detection, these three groups of probe SA, SB, SC then select the sequence selection of circuit 31 through the simulation multitask, conversion with analog-to-digital conversion circuit 32, the digital signal that changes into is respectively 00100,11110,01110, and these three groups of signals are represented to be in 8 modes after importing an IC12 00000100, 00011110, 00001110, the data of its c1 row of this three document and three characters of burning in advance in EPROM11 are compared in an IC12, and can compare out it and come to the same thing this moment.

Then when an IC12 judges second COM signal and is logic0, prepare this moment the c2 row are done detection, these three groups of probe SA, SB, SC then select the sequence selection of circuit 31 through the simulation multitask, with the conversion of analog-to-digital conversion circuit 32, the digital signal that changes into is respectively 01010, 01001, 10001, and these three groups of signals are represented to be in eight modes after importing an IC12 00001010, 00001001, 00010001, the data of its c2 row of this three document and three characters of burning in advance in EPROM11 are compared in an IC12, and wherein the signal that received of second group of SEG probe SB is 00001001 with EPROM11 in character " B " and c2 row data 00010001 its comparison result differences, this character of the one IC " B " character code write down, after treating that all data comparisons finish, the one IC12 can export this problematic character code to the 2nd IC13, and drive this display frame 42 by the 2nd IC13 and demonstrate problematic " B " (as shown in Figure 8), and luminous and this hummer 35 pipes three with this red light 34, and is wrong with the quality of representing this CGROM43.

Comprehensively above-mentioned, the present invention system is with the font data of the built-in book character of this EPROM11 and the character code of this CGROM43 driving, through the most sequence selection of circuit 31 and the conversion of signals of analog-to-digital conversion circuit 32 selected of this simulation, compare via the data of an IC12 again, with the driving of differentiating this CGROM43 whether problem is arranged, the proofer all can be easily by green light 33, red light 34, determine in hummer 35 and the display frame 42, whether this CGROM43 of this pcb board 40 has problem, therefore the checkout procedure of a slice pcb board 40 only needs the several seconds to finish, can save the expenditure of manpower, can finish work for inspection fast again, the situation that more can reduce artificial erroneous judgement takes place.

Claims

1. CGROM pick-up unit is characterized in that comprising:

One body, be provided with an EPROM in this body, the built-in font data that is equipped with a plurality of book characters of this EPROM, the data of this EPROM may be output to an IC with data comparison and data memory function, and an IC connects and drives the 2nd IC with signal output and control function;

One probe module connects the 2nd IC, and is controlled by the 2nd IC; This probe module cording has one can be in conjunction with the location-plate of a pcb board, one side of this location-plate has protruded out most SEG signal probes and a plurality of COM signal probe, these a plurality of SEG signal probes and this a plurality of COM signal probes can touch a plurality of sensing points that this pcb board has respectively, have a control IC in addition on this pcb board, its inside of this control IC has the CGROM that a control character shows;

One circuit module, it has a simulation multitask and selects a circuit and an analog/digital change-over circuit, this simulation multitask selects circuit can connect a plurality of SEG signal probes of this probe module and an IC and the 2nd IC of this body, and this simulation multitask is selected circuit and is communicated with this analog-to-digital conversion circuit, and this analog-to-digital conversion circuit also connects this a plurality of COM signal probes, and this analog-to-digital conversion circuit and be connected with an IC.

2. according to claims 1 described CGROM pick-up unit, it is characterized in that, on this circuit module and be provided with respectively a green light, a red light and a hummer that drives by the 2nd IC.

3. according to claims 1 described CGROM pick-up unit, it is characterized in that this majority SEG signal probe is 15, and all be divided into totally three groups of first group of probe, second group of probe and the 3rd group of probes etc.; And should majority COM signal probe be seven.

4. according to claims 1 described CGROM pick-up unit, it is characterized in that this pcb board binds unification can drive the display frame that shows by this CGROM that controls IC.

5. the detection method of a CGROM, mainly be by showing on display screen whether the built-in character of described CGROM detects this character complete, it is characterized in that comprising as follows: each character conversion to be detected is become calibration data, with described data in advance burning in EPROM, be provided with one and have, the described data transmission in the EPROM is formed the calibration numerical code in a described IC an IC of memory function when; Utilization is installed in the 2nd IC on the pcb board makes the display screen of being supported by described CGROM show the character of described CGROM to be detected; Obtain corresponding analog signal by the output point of COM on the described pcb board and SEG simultaneously, select the sequence selection of circuit and the conversion of analog-to-digital conversion circuit to form digital signal through the simulation multitask described simulating signal; With described digital signal and the calibration numerical code contrast that is stored among the IC, thereby whether the character of differentiating automatically among the described CGROM is defective in quality.

6. according to the described detection method of claim 5, it is characterized in that: described calibration data is seven eight a hexadecimal number.

7. according to the described detection method of claim 5, it is characterized in that it being also to come automatic district office to state whether character has problem among the CGROM by setting light, sound.