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Reflective modulator and image display device

A light modulator, reflective technology, used in instruments, image communications, static indicators, etc., to solve problems such as poor efficiency

Inactive Publication Date: 2004-04-21
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, the frame rate is cut in half, making the efficiency even worse

Method used

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  • Reflective modulator and image display device
  • Reflective modulator and image display device
  • Reflective modulator and image display device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0098] First, the first embodiment will be described in which the modulation layer 8 does not have a memory characteristic state, and therefore, it is necessary to maintain the electric field applied to the modulation layer 8 while an image is being displayed. In other words, since the modulation layer 8 does not have the memory characteristic state as described above, an electric field must be continuously applied to the modulation layer 8 in order to maintain the driving state of the modulation layer 8 . It should be noted that, on the other hand, in the case where the modulation layer 8 has a memory characteristic state, once the modulation layer 8 is in the driven state, it is no longer necessary to continuously maintain the electric field applied to the modulation layer 8 .

[0099] In this example, if Figure 5 and 6 As shown, a control line 25 is generated on the driving layer 6 of the optical spatial modulator 3, and each storage unit 12 of the optical spatial modulat...

no. 2 example

[0117] A second embodiment in which it is necessary to neutralize residual charges in the modulation layer 8 is described below. It should be noted that, in the second embodiment, a light modulation material capable of changing the light modulation state in response to an applied electric field regardless of the polarity of the electric field is used as the material of the modulation layer 8 . That is, in the case of the second embodiment, the modulation layer 8 is in a driven state when a positive electric field or a negative electric field generated by the driving layer 6 is applied to the modulation layer 8 . On the other hand, modulation layer 8 is in an initial state when no electric field is applied thereto.

[0118] In the second embodiment, as Figure 9 and 10 As shown, a first control line 36 and a second control line 37 are generated on the driving layer 6 of the optical spatial modulator 3, and each storage unit 12 of the optical spatial modulator 3 is designed to...

no. 3 example

[0132] In the case of the third embodiment, a light modulation material having memory characteristics (for example, FLC and PDLC) is used as the material of modulation layer 8 . When displaying an image, an electric field is applied to the modulation layer 8 only when it is necessary to change the modulation layer 8 from the initial state to the driving state. The modulation layer 8 is reset to the initial state before displaying the next image.

[0133] In the third embodiment, such as Figure 13 and 14 As shown, the first control line 46, the second control line 47 and the third control line 48 are produced on the driving layer 6 of the optical spatial modulator 3, and each storage unit 12 of the optical spatial modulator 3 is designed to include the first A memory 41, a second gate circuit 42, a second memory 43, a second gate circuit 4 and a driver 45, such as Figure 15 shown. The second memory 43 used in the storage unit 12 is used to store pixel data of an image bei...

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Abstract

The invention provides an optical spatial modulation device capable of rewriting an image with a high degree of efficiency and implementing a very fast response speed and an extremely high intensity, and provides an image display apparatus employing the optical spatial modulation device. The optical spatial modulation device includes a 1st memory for storing pixel data of an image, a 2nd memory to which the pixel data stored in the 1st memory is transferred to the 2nd memory, and a driving part in accordance with the pixel data transferred to the 2nd memory to change the optical transmissivity, the optical reflectance or the polarization state of the pixel. When displaying an image, first of all, pixel data is stored in the 1st memory of each of all pixels composing the image. Then, the pixel data is transferred from the 1st memory to the 2nd memory. Finally, the driving means of each of the pixels changes the optical transmissivity, the optical reflectance or the polarisation state of the pixel in accordance with the pixel data transferred to the 2nd memory.

Description

technical field [0001] The present invention relates to an optical spatial modulator and an image display device using the optical spatial modulator which modulates radiated light according to information of each pixel of an image to be displayed. Background technique [0002] A liquid crystal display is considered an optical spatial modulator that modulates radiated light according to the information of each pixel of the image to be displayed. A common type of liquid crystal display that has been widely used modulates the intensity of light by placing an array of so-called twisted nematic liquid crystals (ie, liquid crystals using a twisted nematic mode of operation) in a continuously changing state. Twisted nematic liquid crystals are hereinafter referred to simply as TN liquid crystals. [0003] Regarding such liquid crystal materials and liquid crystal displays, it has been disclosed in the following publications: An article by Yoko Watanabe entitled "New Technology See...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/133G09G3/00G09G3/34G09G3/36H04N5/74
CPCG09G3/3406G09G2300/0842G09G3/002G09G3/36G09G2310/0237G09G3/3648H04N9/3197H04N9/3102H04N9/3141
Inventor 秋元修
Owner SONY CORP
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