JPS63109982U

JPS63109982U -

Info

Publication number: JPS63109982U
Application number: JP1987002223U
Authority: JP
Priority date: 1987-01-09
Filing date: 1987-01-09
Publication date: 1988-07-15
Also published as: JPH0422368Y2

Description

[Brief explanation of the drawing]

第１図は本考案による液晶表示装置の一実施例
を示す略構成図、第２図は第１図中において図番
１３で示した制御手段の一例を示す電気回路図、
第３図は本考案による液晶表示装置の他の実施例
を示す略構成図を示している。第４図は従来周知
のＥＬ素子駆動回路の一例を示す略電気回路図、
第５図はＥＬ素子の直流パルス駆動回路例を示す
電気回路図、第６図は周知のＥＬ素子の一例の断
面図、第７図は直流パルス駆動時、ＥＬ素子に供
給される電圧波形を示す電圧波形図を示している
。３……ＥＬ素子、８……透明電極、１１……背
面電極、１２……液晶表示体、１３……制御手段
、１４……サイリスタ、１５……ダイオード、１
６……トランジスタ、１７，１８……抵抗、１９
……発振器、２０……給電路、２１……絶縁体。 FIG. 1 is a schematic configuration diagram showing an embodiment of a liquid crystal display device according to the present invention, and FIG. 2 is an electric circuit diagram showing an example of the control means indicated by the number 13 in FIG.
FIG. 3 shows a schematic configuration diagram showing another embodiment of the liquid crystal display device according to the present invention. FIG. 4 is a schematic electrical circuit diagram showing an example of a conventionally known EL element drive circuit;
Fig. 5 is an electric circuit diagram showing an example of a DC pulse drive circuit for an EL element, Fig. 6 is a cross-sectional view of an example of a well-known EL element, and Fig. 7 shows a voltage waveform supplied to the EL element during DC pulse drive. A voltage waveform diagram shown in FIG. 3... EL element, 8... Transparent electrode, 11... Back electrode, 12... Liquid crystal display, 13... Control means, 14... Thyristor, 15... Diode, 1
6... Transistor, 17, 18... Resistor, 19
...Oscillator, 20...Power supply line, 21...Insulator.

Claims

[Claims for Utility Model Registration] (1) A liquid crystal display having a desired pattern of electrodes and operating to perform a desired display, and a liquid crystal display disposed close to the entire bottom surface of the liquid crystal display and brought to ground potential. an EL element comprising a transparent electrode and a back electrode to which a predetermined voltage with respect to the ground potential is supplied in a pulsed manner, and the ground potential and the predetermined potential are supplied in a pulsed manner to each of the transparent electrode and the back electrode; A liquid crystal display device comprising: a control means for controlling the EL element, and using the EL element as a light source for illumination. (2) The control means includes a series body consisting of a thyristor, a diode, and a transistor connected between a DC high voltage terminal and a ground potential, and a resistor connected between the common anode and gate of the thyristor;
It consists of an oscillator that outputs a pulse signal that controls conduction and non-conduction of the transistor, and a power supply path that connects the gate of the thyristor and the cathode of the diode.
The liquid crystal display device according to claim 1, wherein the transparent electrode of the EL element is connected to the cathode of the back electrode of the element. (3) The liquid crystal display device according to claim 1, wherein the EL element is disposed close to the entire bottom surface of the liquid crystal display via a conductor connected to a ground potential.