Head-up display device
A head-up display and image display technology, applied to static indicators, cathode ray tube indicators, instruments, etc., can solve problems such as increased heat generation, larger light sources, and increased power consumption
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Embodiment 1
[0042] In Embodiment 1, a configuration in which two sets of video display devices 30a and 30b are used to display a far-distance virtual image and a near-distance virtual image, respectively, will be described. The structure of the image display device for close-range virtual images is that a functional film is installed in the opening of the device, and the generated image is projected on the surface of the functional film. In Example 1, the case where a transmittance variable film whose transmittance changes with voltage application is used as the functional film will be described.
[0043] Figure 3A and Figure 3B It is a block diagram showing the internal structure of the HUD device 1 . The HUD device 1 includes two sets of video display devices 30a and 30b. The first video display device 30a is used for long-distance display, and the second video display device 30b is used for short-distance display. The structural elements of each video display device are referred to...
Embodiment 2
[0085] In Embodiment 2, a case in which a far-distance virtual image and a near-distance virtual image are alternately displayed will be described. By switching the display of near and far virtual images at high speed, the near and far virtual images appear to be displayed at the same time. In addition, by alternately displaying the far-distance virtual image and the short-distance virtual image at the same position in the display area, the long-distance virtual image and the short-distance virtual image can also be superimposed and displayed.
[0086] Figure 12 It is a figure explaining the method of alternately displaying near and far virtual images. The functional film 51 is mounted on the entire surface of the anti-glare portion 50 of the HUD device 1 , and the ON / OFF control of the applied voltage is performed according to the outgoing long-distance and short-distance images. Figure 12 (a) shows the case of emitting a long-distance image, the voltage of the functional...
Embodiment 3
[0093] In Example 3, the case where a film (herein referred to as a self-luminous film) capable of generating an image when irradiated with a special laser light is used as the functional film will be described. The self-luminous film is usually transparent, but when a laser beam of a certain wavelength is irradiated, the luminous body of the irradiated part emits light to generate characters or images of a certain color (eg, green). Furthermore, when the image light other than a specific laser beam is irradiated, the image light can be transmitted as it is.
[0094] In Examples 1 and 2, a variable transmittance film was used as the functional film, but the above-mentioned self-luminous film was used instead. The structure of the HUD device can be used Figure 3B the laser scanning method, but the functional film control part 52 will become unnecessary. The installation method of the functional film 51 (self-luminous film) is the same as Figure 5 The same, but can also be ...
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