Image display apparatus, image display system, and image display method
An image display device and image display technology, which are applied in stereo systems, image communication, static indicators, etc., can solve the problem of not being able to display stereo images with sufficient brightness.
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no. 1 Embodiment approach
[0036] A first embodiment of the present invention will be described in detail with reference to the drawings. exist figure 1 A configuration example of the image display device is shown in a block diagram. The image display system includes: an image display device (projector) 1 and glasses (not shown) for making the left-eye image and the right-eye image displayed by the image display device 1 Alternately pass through.
[0037] The image display device 1 includes an optical system and an infrared light source unit (infrared LED unit) 9 . The optical system includes: LED 14R for red light (for R light), LED 14G for green light (for G light), LED 14B for blue light (for B light), collimator lens 12, spatial light modulation element 13R for red light, green light The spatial light modulation element 13G, the blue light spatial light modulation element 13B, the cross dichroic prism 11 and the projection lens 17 are used.
[0038] The LED for red light (red light source unit) ...
no. 2 Embodiment approach
[0072] A second embodiment of the present invention will be described in detail with reference to the drawings. The second embodiment is different from the first embodiment in that the amount of light emitted by the light source is adjusted (dimming) by changing the current amount of the current driving the light source by changing the duty ratio of the PWM signal. Hereinafter, only the points of difference from the first embodiment will be described.
[0073] The image display device 1 includes a storage unit (not shown). The storage unit stores a look-up table (Look Up Table) (hereinafter referred to as “LUT”) indicating the relationship between the duty ratio of the PWM signal and the light emission amount. The LUT is controlled by the control section 2 (refer to figure 2 ) reference. use Figure 4~6 The duty ratio of the PWM signal in the second embodiment will be described.
[0074] exist Figure 4 The relationship between the PWM signal and the time response of th...
no. 3 Embodiment approach
[0086] A third embodiment of the present invention will be described in detail with reference to the drawings. The third embodiment differs from the first and second embodiments in that the liquid crystal driving method is the surface writing method. Hereinafter, only the points of difference from the first embodiment and the second embodiment will be described.
[0087] exist Figure 7 In the figure, the relationship between the PWM signal and the time response of the shutter of each glasses is shown by a timing chart. Figure 7 The method of driving the liquid crystal is the surface writing method. That is, the driving of the liquid crystal for displaying the image L for the left eye starts at times ta0 , ta7 , and ta14 , and ends at substantially the same timing as these start times. In addition, the driving of the liquid crystal for displaying the image R for the right eye starts at times ta3 and ta11 and ends at substantially the same timing as these start times.
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