The invention relates to an image display device, a brightness control method, and a brightness control program, which can reduce the confusion of a user watching an image displayed in a display section. The image display device includes: a display part which is arranged inside the frame body is provided in the observation window and display the image acquisition unit, its brightness; inside the observation window space; and a control unit, the brightness of the acquisition unit acquires the first brightness under the condition of brightness the display part is set to second brightness, brightness in the acquisition portion is made than the first brightness third brightness conditions, the brightness of the display part is higher than the second of the fourth brightness brightness.
【技术实现步骤摘要】
【技术保护点】
１．一种图像显示装置，其特征在于，包括：显示部，其被配置在设置于框体上的观察窗的内侧并显示图像；取得部，其取得上述观察窗的内侧的空间的亮度；以及控制部，其在上述取得部取得的亮度是第一亮度的情况下，将上述显示部的亮度设为第二亮度，在上述取得部取得的亮度是比上述第一亮度亮的第三亮度的情况下，将上述显示部的亮度设为比上述第二亮度亮的第四亮度。
【技术特征摘要】
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