JPH0227193U - - Google Patents
Info
- Publication number
- JPH0227193U JPH0227193U JP10503588U JP10503588U JPH0227193U JP H0227193 U JPH0227193 U JP H0227193U JP 10503588 U JP10503588 U JP 10503588U JP 10503588 U JP10503588 U JP 10503588U JP H0227193 U JPH0227193 U JP H0227193U
- Authority
- JP
- Japan
- Prior art keywords
- drive signal
- circuits
- circuit
- segment
- common
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010586 diagram Methods 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 3
Landscapes
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Liquid Crystal Display Device Control (AREA)
Description
第１図は本考案の液晶の表示評価回路を示す回
路図、第２図は第１図の各部波形を示すタイミン
グチヤート、第３図は従来の液晶の表示評価回路
を示す回路図、第４図は第３図の各部波形を示す
タイミングチヤート、第５図は８の字セグメント
の表示パターンを示す図である。
２０……比較回路、２４……第１０Ｒ回路、２
５……第２０Ｒ回路、２６，２７，２８……ＥＸ
ＯＲ回路。
Fig. 1 is a circuit diagram showing a liquid crystal display evaluation circuit of the present invention, Fig. 2 is a timing chart showing waveforms of each part in Fig. 1, Fig. 3 is a circuit diagram showing a conventional liquid crystal display evaluation circuit, and Fig. 4 is a circuit diagram showing a conventional liquid crystal display evaluation circuit. This figure is a timing chart showing waveforms of various parts in FIG. 3, and FIG. 5 is a diagram showing a display pattern of a figure-eight segment. 20...Comparison circuit, 24...10R circuit, 2
5... 20th R circuit, 26, 27, 28... EX
OR circuit.
Claims (1)
と共に複数のセグメント電極にセグメント駆動信
号を印加することによつて表示される液晶の表示
評価回路において、 コモン駆動信号の電圧レベルを、第１所定電圧
と比較する第１コンパレータ及び第２所定電圧と
比較する第２コンパレータより成る複数の比較回
路と、 前記複数の比較回路に各々設けられ、前記１及
び第２コンパレータの出力が印加される複数の第
１０Ｒ回路と、 前記複数の第２コンパレータの各出力が印加さ
れる第２０Ｒ回路と、 該第２０Ｒ回路の出力及びセグメント駆動信号
が印加される複数のＥＸＯＲ回路と、 前記複数の第１０Ｒ回路の出力及び前記複数の
ＥＸＯＲ回路の出力間に接続された複数の発光ダ
イオードとを備え、 前記コモン駆動信号及び前記セグメント駆動信
号に基づいて、前記複数の発光ダイオードを駆動
することを特徴とした液晶の表示評価回路。[Scope of Claim for Utility Model Registration] In a display evaluation circuit for a liquid crystal display that is displayed by applying a common drive signal to a plurality of common electrodes and a segment drive signal to a plurality of segment electrodes, the voltage of the common drive signal is a plurality of comparison circuits each comprising a first comparator that compares the level with a first predetermined voltage and a second comparator that compares the level with a second predetermined voltage; a plurality of 10R circuits to which is applied, a 20R circuit to which each output of the plurality of second comparators is applied, a plurality of EXOR circuits to which the output of the 20R circuit and the segment drive signal are applied; a plurality of light emitting diodes connected between the outputs of the plurality of 10R circuits and the outputs of the plurality of EXOR circuits, and driving the plurality of light emitting diodes based on the common drive signal and the segment drive signal. A liquid crystal display evaluation circuit featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10503588U JPH0645994Y2 (en) | 1988-08-09 | 1988-08-09 | LCD display evaluation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10503588U JPH0645994Y2 (en) | 1988-08-09 | 1988-08-09 | LCD display evaluation circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0227193U true JPH0227193U (en) | 1990-02-22 |
| JPH0645994Y2 JPH0645994Y2 (en) | 1994-11-24 |
Family
ID=31337292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10503588U Expired - Lifetime JPH0645994Y2 (en) | 1988-08-09 | 1988-08-09 | LCD display evaluation circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0645994Y2 (en) |
-
1988
- 1988-08-09 JP JP10503588U patent/JPH0645994Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0645994Y2 (en) | 1994-11-24 |