Backplane device for a spatial light modulator and method for operating a backplane device
A technology for spatial light modulators and backplanes, which is applied in active addressing light modulators, optics, instruments, etc., can solve problems such as difficulty in implementation, and achieve the effect of reducing power consumption and high grayscale resolution.
Active Publication Date: 2013-04-10
SEEREAL TECHNOLOGIES
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Problems solved by technology
[0010] Since the inhomogeneity of LTPS (Low Temperature Polycristalin Silicon, low temperature polysilicon) complicates the implementation of the analog circuits required for analog shift registers, use pixel clusters and a specially developed backplane structure for analog shift registers - eg WO 2009 / 024523A1 Or as disclosed in WO 2009 / 092717A1 - may be difficult to implement in current LTPS-TFT
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[0100] figure 1 A schematic diagram showing an example of a voltage characteristic of an analog line of a backplane device according to the prior art.
[0101] The voltage V is shown as a function of the number N of pixels over the duration of two frames. Since the pixels of the spatial light modulator in the prior art addressing scheme are addressed row by row and within a single line one by one, each time the next pixel according to the fixed addressing scheme is addressed, 0V and 6V Different uniformly distributed voltages ranging in between were applied to the analog lines of the prior art backplane. This leads to driving analog values in an extremely fast manner from areas outside the display, causing physical limitations of the electronics of the backplane arrangement, such as large line capacitances preventing continued analog line switching frequency increases. However, the frame rate or refresh rate of the spatial light modulator can be increased according to the...
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The present invention relates to a backplane device (16) for a spatial light modulator (12), especially a spatial light modulator (12) in a display device for generating a two-dimensional and / or three-dimensional representation of a scene or of content. The spatial light modulator (12) comprises pixels (14) having pixel addresses and being electronically controllable by the backplane device (16) for assigning pixel values (15) to the pixels (14). The backplane device (16) comprises at least one electrode (500) for each pixel (14), at least one analog line (22) and at least one pixel addressing means (24). Such a pixel addressing means (24) comprises x-addressing lines (26) and y-addressing lines (28). Every pixel (14) is connected to an analog line (22), to an x-addressing line (26) and to a y-addressing line (26). As a pixel value (15) assigning scheme a generating means is adapted to generate a voltage characteristic (10) to be applied to the at least one analog line (22) such that the voltage characteristic (10) depends on the pixel values (15) to be assigned to the pixels (14). The backplane device (16) is adapted such that the pixel addresses are determined depending on the generated voltage characteristic (10) as a pixel addressing scheme and such that the generated voltage characteristic (10) is applied to the at least one analog line (22) for the purpose of assigning the pixels value (15) to the pixels (14).Furthermore, the present invention relates to a method for operating a backplane device(16) for a spatial light modulator(12).
Description
technical field [0001] The invention relates to a backplane arrangement for a spatial light modulator and to a method for operating the backplane arrangement. Background technique [0002] Spatial light modulators are especially designed for use in display devices in the form of high-resolution displays for displaying information. The application fields of the present invention include high-resolution displays, especially TFT (thin film transistor, thin film transistor) displays and LCOS (liquid crystal on silicon, liquid crystal on silicon) for purposes requiring very fast pixel control. Another field of application is optical elements with spatial light modulators, which influence the direction or shape of light beams or the shape of coherent wavefronts. [0003] Figure 26 An example of an active matrix (AM) structure of a backplane device according to the prior art is shown, which includes four pixel electrodes 11 - 1 , 11 - 2 , 11 - 3 , and 11 - 4 . The gate lines are...
Claims
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IPC IPC(8): G09G3/20G02B27/22G03H1/04G02B30/00
CPCG03H1/02G03H1/22G03H1/2294G03H2001/0224G03H2225/22G09G3/2085G09G2310/02G09G2310/0259G09G2320/0223G09G3/20G02B30/00
Inventor 罗伯特·米斯拜奇
Owner SEEREAL TECHNOLOGIES