JPH0322419U

JPH0322419U -

Info

Publication number: JPH0322419U
Application number: JP5452890U
Authority: JP
Priority date: 1990-05-24
Filing date: 1990-05-24
Publication date: 1991-03-07

Description

[Brief explanation of drawings]

第１図は本考案のオンスクリーンデイスプレイ
機能を利用したサウンドレベル表示回路を示す詳
細回路図、第２図は本考案のバー駆動部のマイコ
ンに内装されたプログラムを示すフローチヤート
の図である。ＳＰ……スピーカー、１……信号整形回路、２
……アナログ／デイジタル変換器、３……水平大
きさカウンタ、４……垂直大きさカウンタ、５…
…コラムアドレスカウンタ、６……ロウアドレス
カウンタ、７……マルチプレクサ、８……バー駆
動回路、１０……増幅部、１１……リミタ部、Ｒ
１，Ｒ２……抵抗、Ｄ１，Ｄ２……ダイオード。 FIG. 1 is a detailed circuit diagram showing a sound level display circuit using the on-screen display function of the present invention, and FIG. 2 is a flowchart showing a program installed in the microcomputer of the bar drive unit of the present invention. SP...Speaker, 1...Signal shaping circuit, 2
...Analog/digital converter, 3...Horizontal magnitude counter, 4...Vertical magnitude counter, 5...
... Column address counter, 6 ... Row address counter, 7 ... Multiplexer, 8 ... Bar drive circuit, 10 ... Amplification section, 11 ... Limiter section, R
1, R2...Resistor, D1, D2...Diode.

Claims

[Claims for Utility Model Registration] (1) In a television with an on-screen display function, a signal shaping circuit that is connected to the output side node of a speaker and that detects the sound signal output from the speaker and shapes it at a certain level. and an analog/digital converter connected to the output node of the signal shaping circuit for converting the analog signal output from the signal shaping circuit into a digital signal, and an analog/digital converter connected to the output node of the analog/digital conversion circuit. A sound level display circuit using an on-screen display is comprised of a sound level display means for displaying a converted digital signal on an on-screen display. (2) The signal shaping circuit is composed of a buffer amplifier section for amplifying the sound output through the speaker, and a limiter section for limiting the sound output from the amplifier section to within a certain level. A sound level display circuit using an on-screen display according to claim 1. (3) The sound level display means counts horizontal and vertical scanning lines to set the position for displaying the output signal of the analog/digital conversion circuit on the screen, and stores the scanning line at the position to be displayed. The size of the sound level row displayed at the screen position determined by the horizontal size counter and vertical size counter and the horizontal size counter section and vertical size counter section is always fixed to the maximum. A row address counter and a column address counter specifying an address so that the size of the column is varied depending on the sound level output from the analog/digital conversion circuit, and a position determined by the row address and column address counter. a multiplexer for specifying a sound level signal on one on-screen display bar; and a multiplexer for specifying the sound level output from the speaker using the output signal output from the multiplexer section and the input synchronization signal for on-screen display. 2. A sound level display circuit using an on-screen display according to claim 1, comprising a bar drive circuit for driving a bar.