Scan-type image display device
An image display device, scanning technology, applied in projection devices, image communication, optics, etc., can solve problems such as brightness limitation of displayed images
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Embodiment 1
[0046] figure 1 is a configuration diagram showing a first embodiment of the scanning image display device of the present invention. The following optical components are housed in the housing 17 . The laser light source 11 emits a green light beam (G light) 21 with a wavelength of 510nm, the laser light source 12 emits a red light beam (R light) 22 with a wavelength of 640nm, and the laser light source 13 emits a blue light beam (B light) 23 with a wavelength of 440nm. The light beams 21, 22, 23 are emitted with intensities corresponding to the signals of the respective color components of the image signal.
[0047] The dichroic mirror (dichroic mirror) 15 transmits the G beam 21 and reflects the R beam 22 . The dichroic mirror 16 transmits the G beam 21 and the R beam 22 and reflects the B beam 23 . Among the beams 21, 22, 23 transmitted or reflected on the dichroic mirrors 15, 16, the G beam 21 is made to travel as a single beam (first beam), and the R beam 22 is combined...
Embodiment 2
[0067] Figure 13 It is a configuration diagram showing a second embodiment of the scanning image display device of the present invention. Basic structure and embodiment 1 ( figure 1 ) is the same, but adopts a configuration in which the positions of the divided first light beam 21 and second light beam 24 are shifted by a distance d in the vertical direction, and also shifted in the horizontal direction by Δd. As a result, the position of the light beam projected on the screen 18 deviates by D' in the oblique direction. When there is a deviation Δd in the horizontal direction, there will be an area where one beam is not irradiated at the left and right ends of the display screen, so it is not ideal. Adjustment, there are cases where a slight deviation Δd still remains.
[0068] In this case, in the above figure 2In the control circuit 20, correction is performed by shifting the output timing of the image signals of the first light beam 21 and the second light beam 24 by ...
Embodiment 3
[0070] Figure 14 is a configuration diagram showing a third embodiment of the scanning image display device of the present invention. In this embodiment, the splitting method of the laser beam is changed, and the G light is divided into G1 light and G2 light to generate a first light beam composed of G1 light and R light, and a second light beam composed of G2 light and B light. That is, by dividing the G light having a relatively high beam intensity ratio into two beams, the intensities (luminous fluxes) of the first beam and the second beam are made equal.
[0071] The device has 2 housings (optical systems). There is a laser light source 11a of G1 light and a laser light source 12 of R light in the housing 17a, and the G1 light beam 21a and the R light beam 22 are synthesized into a first light beam (G1 / R) 25, which is reflected on the first deflection mirror device 14a projected onto the screen 18. There is a laser light source 11b of G2 light and a laser light source ...
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