JPS638733U

JPS638733U -

Info

Publication number: JPS638733U
Application number: JP7818886U
Authority: JP
Priority date: 1986-05-26
Filing date: 1986-05-26
Publication date: 1988-01-21

Description

[Brief explanation of the drawing]

第１図はこの考案の焦点検出エリア表示装置の
回路を示すブロツク図、第２図は焦点検出部の構
成を示す図、第３図は焦点検出状態の説明図、第
４図はＣＣＤラインセンサとその上に設定される
基準部、参照部、焦点検出用ゾーンの説明図、第
５図はＣＣＤラインセンサ上の焦点検出用ゾーン
と被写体上での焦点検出エリアの関係を示す図、
第６図はマイクロプロセツサ内の信号処理のフロ
ーチヤート、第７図及び第８図は電子フアインダ
の表示例を示す図である。１：撮影及び焦点検出用光学系、２：撮像部、
７：図形ＲＯＭ、８：加算回路、９：マイクロプ
ロセツサ、１０：焦点検出部、１９：ＣＲＴ。 Figure 1 is a block diagram showing the circuit of the focus detection area display device of this invention, Figure 2 is a diagram showing the configuration of the focus detection section, Figure 3 is an explanatory diagram of the focus detection state, and Figure 4 is the CCD line sensor. and an explanatory diagram of the reference part, reference part, and focus detection zone set thereon; FIG. 5 is a diagram showing the relationship between the focus detection zone on the CCD line sensor and the focus detection area on the subject;
FIG. 6 is a flowchart of signal processing within the microprocessor, and FIGS. 7 and 8 are diagrams showing examples of displays on the electronic finder. 1: Optical system for photographing and focus detection, 2: Imaging section,
7: Graphic ROM, 8: Adder circuit, 9: Microprocessor, 10: Focus detection section, 19: CRT.

Claims

[Scope of utility model registration request]

A video camera comprising a focus detection means for detecting a focus state of a photographing lens on a subject within a focus detection area based on subject light that has passed through the photographic lens, and an electronic viewfinder for displaying a subject image. a determining means for determining when a subject within the photographic area is in a state in which focus cannot be detected and outputting a focus detectable signal; a focus detection area display means for superimposing the subject video signal and outputting it to the electronic viewfinder; and a focus detection area display figure signal in a manner different from that during focus detection operation in response to the focus detection failure signal detected by the discrimination means. A focus detection area display device characterized by comprising a warning display means for superimposing a video signal of a subject being photographed and outputting it to an electronic viewfinder.