That may make sense... but it's definitely NOT what this patent application is describing:Looking at the patent application...
The main idea is that the eye detect sensor is moved into the pop-up EVF bit, so that it isn't in part of the main camera body/screen and thus impinging on the available area for the screen.
- Paragraph 0039 of the application describes the eye detection sensor, which is labelled as item 200 in the diagrams.
- Paragraph 0044 of the application describes a "protective plate" to cover the eye detection sensor. This plate is labelled 201 in the diagrams.
If you look at the diagrams, you see quite clearly that the items marked 200 or 201 are NOT on the viewfinder, but are in the same assembly as the display panel. This fact is also made plain later in the text of the patent application.
Paragraph 0074 is interesting, as it explains that, although not illustrated in the diagrams, "the eyepiece may be operable while tilted. This arrangement, even when the camera is held at a low position for shooting from a low angle, enables to enhance operabiility when using the electronic viewfinder."