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EP0516183A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Television receiver

Assignee: Sanyo Electric Co Ltd
•
Filing: 1989-07-19
•
Granted: —
•
Expires: 2009-07-19
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Abstract

Abstract A television receiver includes a volume control circuit (4) for controlling levels of sound signals corresponding to a left channel, a right channel, a center channel and a surround channel and speakers (6 to 10) corresponding to these channels. The television receiver further comprises a test tone circuit (11; 18), a microcomputer (14) and a character display circuit (16). The test tone circuit (11; 18) supplies a test tone of a prescribed frequency sequentially to the speakers (6 to 10) through the volume control circuit (4). The microcomputer (14) provides a command to the character display circuit (16) so that a CRT (17) displays which speaker is currently supplied with the test tone as well as volume levels of the respective speakers.

Inventors

  • 👤 Tsutomu Ishikawa
  • 👤 Ryuichi Ogawa
  • 👤 Masaya Tanno
  • 👤 Fumio Tosaka
  • 👤 Hirofumi Okada
  • 👤 Takayuki Imaida

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-05 00:04
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/44; H04N5/60; H04S; H04S7/00; H04S7/30; H04S7/302; H04S7/40; H04S3/00

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 122 words
A television receiver having a television screen (17) and reproducing sound signals corresponding to a plurality of channels, comprising: volume control means (14) for controlling levels of said sound signals corresponding to said plurality of channels respectively; a plurality of speaker means (6 to 10) provided in correspondence to said plurality of channels for regenerating said sound signals controlled by said volume control means (4) respectively; test tone supply means (11; 18) for supplying a test tone of a prescribed frequency to said plurality of speaker means (6 to 10) through said volume control means (4) every prescribed period; and display means (14 to 16) for displaying which speaker means is currently supplied with said test tone on said television screen (17).
Claim 2
Dependent Claim 30 words
A television receiver in accordance with claim 1, wherein said display means (14 to 16) further display volume levels corresponding to said plurality of channels on said television screen (17).
Claim 3
Dependent Claim 140 words
A television receiver in accordance with claim 2, wherein said plurality of channels include first, second, third and fourth channels, said test tone supply means (11; 18) includes: test tone generating means (110; 21) for generating a test tone of a prescribed frequency, control signal generating means (114; 19, 20, 26) for generating a control signal in a prescribed cycle, and switching means (111 to 113, 22 to 25) for supplying said test tone to said plurality of speaker means (6 to 10) through said volume control means (4) every prescribed period in response to said control signal, and said display means includes control means (14 to 16) making display indicating the speaker currently supplied with said test tone on said television screen (17) in response to said control signal from said control signal generating means (114; 19, 20, 26).

References Cited (Backward Citations)

US4577188A Cited
GB2118407A Cited

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