JPS62193295U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is a functional block diagram of the device of the present invention, and FIG. 2 is a front view of the screen showing an example of the display in the initial state.
FIG. 3 is a flowchart of the drawing procedure, FIG. 4 is a characteristic diagram showing the correspondence between image information and brightness level, and FIG. 5 is an operation explanatory diagram. 3...Screen, 5...First luminance signal generation means, 6...Second luminance signal generation means, 10...Switch means, 2...Switch control means, 12...Memory means, 17...Image correction means , 16...Control signal forming means, 22...Modification mode specifying means, 1
8... Light pen, 23... Substitution means (CRT controller).

Claims (1)

[Claims for Utility Model Registration] (1) A screen that receives a brightness signal and generates an amount of light according to the level of the brightness signal, and generates a first brightness signal at a brightness level that exhibits a first amount of light on the screen. a second brightness signal generating means for generating a second brightness signal on the screen at a brightness level exhibiting a second light amount smaller than the first light amount but larger than zero; a first input section for inputting a first luminance signal from the signal generating means; a second input section for inputting the first luminance signal from the second luminance signal generating means;
switching means having a second input for inputting a brightness signal and an output connected to the screen; and either the first brightness signal from the first input or the second brightness signal from the second input. and switch control means for controlling the switch means to select and connect to the output section. (2) The switch control means includes a memory means having a capacity to store image information corresponding to one screen of the screen, an image modification means for modifying the content of the image information stored in the memory means, and A black-and-white utility model according to claim (1) of claim 1, further comprising control signal forming means for reading the information content of the memory means and forming a control signal to the switch means based on the readout signal. Image display device. (3) The image correction means includes a correction mode specifying means, a light pen capable of specifying any position on the screen and outputting information regarding the position, and a position specified by the light pen. 2. The black and white image display device according to claim (2), further comprising means for replacing contents in the memory corresponding to the above with correction information by the correction mode specifying means.