JPS5847226A - Electronic device - Google Patents

Abstract

PURPOSE:To combine the display section and light measuring section and display measured values and others in the same area of view by receiving the light that passes through a display plate or reflects from it and applying calculation to the obtained light measurement data and displaying this on the said display plate. CONSTITUTION:A display plate 1 consists of liquid crystal matrix cells, etc. and it is placed in front of a light amount sensor 2. The output of the sensor 2 is amplified by an amplifier 3 and supplied to an arithmetic unit (CPU)4, and there analog signals are converted into digital signals, and the latter are stored as the light measurement data in a memory 5. A display control circuit 6 determines the light transmission section of the display plate 1 and makes the results of calculation displayed on the display plate 1. A light in the direction of A passes through the point B of the opening in the display plate 1 at a certain time and measured by the sensor 2, and the measurement is stored as a light measurement data at the point B. The measured light is scanned successively in the direction of the arrow mark E from the point C to start the light measurement to the point D where the light measurement ends, and the results of the measurement are stored in the data as light measurement data. When the light measurement is finished, it is processed at the CPU and the value of exposure or the characteristic curve of the light sensitive matieial, for example, is displayed as a graph.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic device having light intensity measurement and display functions.

An embodiment according to the present invention will be described below with reference to the drawings. let

One display control circuit 6 serves to determine the transparent portion of the display panel 1 and also generates a control signal for displaying the calculation result on the display panel 1.

The light from the input direction passes through 13 points formed on the display panel 1 at a certain point, and is measured by the light amount sensor 2. The light amount is measured as photometric data at point B by the above-described operation. be remembered. For photometry, move from the photometry start point C to arrow E.
The dots are sequentially scanned in the direction of , until reaching the photometry end point, and are stored as photometry data for each dot.

When the photometry is completed, the stored photometry data is subjected to arithmetic processing to produce, for example, the exposure value as shown in FIG. 2, or a graph of the characteristic curve of the photosensitive material and the photometry data as shown in FIG. and display it on the display board 1. The display board 1 is not limited to a transmissive type as shown in the figure, but may also be a reflective type.
At this time, the sensor 2 is placed on the front side of the sensor 1 and is set to 14, which is extremely suitable for applications such as shore singing.

For example, in conventional exposure meters, the light receiving angle is fixed, and in wide-angle ones, unnecessary portions are subtracted by 6111 yuan, resulting in large errors in photometric values. In the case of spot exposure meters with small angles, four measurements were taken to determine the appropriate value by measuring parts of the object to be measured (subject) many times with different amounts of light.

According to the present invention, the measurement range can be freely selected by selecting the scanning area. In other words, an exposure meter with a variable light-receiving angle is constructed, and one light meter can be used for both the light-receiving angle of a spot light meter and the light-receiving angle of a general light meter, and accurate side light can be obtained.

It's a sword, scan that opening 11111 times, valley Ro N+
, by measuring the light intensity at one position and storing it in the storage device ft, the difference in the light intensity over the entire area within the measured acceptance angle,
It is possible to know the ratio of 11 to 11 in a short time, and the exposure 110f is suitable for the characteristics of the photosensitive material (film, etc.) and the intention of drawing.
f can be determined.

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[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of the present invention. In Fig. 1, 1...Electronic shutter also used as a display device 2...Light level sensor 3...Amplification circuit 4...Arithmetic unit 5...Storage device 6...Display open side 1 circuit A1 Light output Incoming direction B1 Electronic shutter opening at a certain point C1 Photometry start position D1 Photometry end position E% E', which is the scanning direction. FIGS. 2 and 3 are diagrams showing examples of data display. Applicant Canon Co., Ltd. Bodhi 4

Claims (1)

[Claims] An electronic device characterized in that a light amount sensor receives and receives light transmitted or reflected by a display board, performs arithmetic processing on the obtained photometric data, and displays the results on the display board.