DE29909537U1 - Display and its control - Google Patents

Description

PHAN, Gia Chuong 8-2232/99

Flat B, 6/Fl, Wun Sha Mansion May 27, 1999

8-10 Wun Sha Street
HONG-KONG

Display and its control Description

The invention relates to a display consisting of pixels and dots and its control.

In well-known displays, such as those used in video, film and computer technology, so-called pixels are arranged along horizontal and/or vertical lines. The pixels usually consist of so-called dots, which represent the three primary colors red, green and blue. Dots are light sources whose light mixture creates luminous mixed colors - this is called additive color mixing.

In computer monitors and televisions, the display is divided into a large number of pixels that are arranged in a fixed grid. The pixels are controlled individually. For example, the pixels are controlled from left to right and from top to bottom, as is usual with a cathode screen.

From EP 0 637 009 A2 a control of active LCD displays is known in which the dots are arranged offset, whereby the pixels are preferably displayed in a delta form. Here the dots are a

a color group are connected vertically to each other via a control line. The horizontal control is pixel-by-pixel, which means that with RGB pixels, three dots are controlled simultaneously. Furthermore, each dot has a memory and a switching element, which means that RGB data can be transmitted using synchronization information, as is the case with conventional monitors, for example.

A color display device for image elements on a color display screen is known from DE 36 06 404 A1. A light gate is used here, the gates of which can be individually controlled with a control circuit, so that the desired color intensity is achieved by controlling the permeability of the respective light gate. Light sources are arranged behind the light gate, which provide at least two primary colors and which are switched in alternating light cycles with a repetition frequency of at least 25 Hz. The light gates are controlled synchronously with this. Due to the inertia of the eye, it is possible for a gate to display the desired color.

The disadvantage of these displays is the number of pixels determined by the raster, which determines the resolution and sharpness of the image. The finer the raster, the higher the resolution. However, the fineness of the raster is limited due to technical manufacturing options, because the cathode screens used have so-called hole masks, the holes in which can only be made smaller with great effort.

Likewise, the integration of a large number of transistors in an LCD display is very complex and involves high levels of rejects.

With an LED display, the arrangement of the LEDs is also very complex and expensive, since their space requirements are determined by their shape.

The object of the present invention is to provide a display of the type described above which has a greater optical resolution for a given raster.

This object is achieved by the features of claim 1, in particular in that the pixels are generated variably from the existing dots, whereby the pixels form a dynamically generated, logical unit by grouping neighboring dots, so that the neighboring pixels physically overlap. The dynamic pixels are generated at such a high speed that the generation is no longer perceptible to the human eye.

A dynamic pixel should consist of at least enough dots to contain all the primary colors specified by the dots.

The pixels are generated dynamically by forming a logical unit of a pixel by grouping neighboring dots. Neighboring pixels physically overlap and the dynamic pixels are generated by sequential control at a speed that is imperceptible to the human eye.

When combining the dots into a pixel, they are selected in such a way that the neighboring pixels only overlap in certain areas. This creates another dynamic pixel between the existing, normally static pixels. The pixels are

compiled to contain all the basic colors provided by the dots.

Further advantageous measures are described in the subclaims. The invention is illustrated in the accompanying drawing and is described in more detail below; it shows:

Figures la-c show different arrangements of four dots within a square pixel;

Figure 2a-b different embodiments of a

Displays with square pixels, wherein the known static pixels are shown as square and the dynamic pixels according to the invention are shown as round;

Figure 3a-d different embodiments of a

Pixels with the three primary colors dots red, green, blue;

Figure 4a-b different embodiments of a display with different pixel shapes, where the known static pixels

rectangular and the dynamic pixels according to the invention are shown oval;

Figure 5 shows a display with a controller connected to the Dot via a network;

Figure 6 shows the course of the interlaced signal

when generating an image (or frame) from two fields;

Figure 7 shows the course of the interlaced signal for dynamic pixels according to the invention.

The pixels 12a, 12b and 12c shown in Figures 1a to 1c have a square shape. The pixels 12a, 12b and 12c have evenly arranged dots 11 which emit the primary colors red - red dot 13, green - green dot 14 and blue - blue dot 15. The pixel in Figure 1b consists only of red dots 13 and green dots 14. Each dot 11 is preferably surrounded by a mask 21 so that a greater contrast is achieved between the dynamic pixels 18. The exact arrangement of the differently colored dots 13, 14 and 15 is not important here. Care must only be taken to ensure that the arrangement of the various dots 13, 14 and 15 in each static pixel 17 within a display 10 is identical.

Figures 2a and 2b show displays 10 and 10a that have square, static pixels 17. The static pixels 17 represent a known rasterization of the display 10 or 10a. The dynamic pixels 18 shown in a circle correspond to the inventive design of the display 10 or 10a. A dynamic pixel 18 contains, like the static pixel 17, four dots 13, 14 and 15, which represent all primary colors.

Unlike the static pixels 17, the dynamic pixels 18 overlap, although complete overlap should be avoided. The human eye is deceived by high-frequency control of the dynamic pixels 18. The eye therefore perceives a more precise representation of the image shown.

The resolution increases for a display with square pixels 12a, 12b and 12c by:

P = (x - 1) ♦ y + (2x - 1) * (y-1)

Pixels, where &khgr; is the number of pixels horizontally and y is the number of pixels vertically.

For the displays in Figures 2a and 2b, this value would be:

P = (3 - 1) * 3 + (2*3-1) * (3 - 1) = 6 + 10 = 16

The display therefore has a resolution of 25 = 16 + 9 instead of 9 pixels.

Figures 3a to 3d show different shapes of pixels 16a, 16b, 16c and 16d, each of which contains three dots 11 for representing the three primary colors. The dots II are separated from one another with sharp contours by masks 21.

The dynamic pixels 18 should preferably each contain the same number of dots II. The exact arrangement of the differently colored dots 13, 14 and 15 is not important here. Consequently, for a non-full-color display, for example, it is sufficient that only two primary colors are provided in the form of dots per pixel, as can be seen from Figure Ib.

Figures 4a and 4b show displays 10b and 10c formed from pixels 16a and 16b, with the increase in resolution being smaller compared to the above-mentioned square form.

Figure 5 shows a display 10 that is connected to a controller 19 through a network 20. This controller 19 can be used to use known dot-by-dot displays to increase their resolution. In the displays according to the invention, all dots each have their own receiver (not shown) that receives digital information sent via the network 20.

ft * * * ·* ··♦« ft· ft«

ft · ·«··· ft ft ft

formations into luminous intensity for the Dots Il.

The network 20 is preferably a fiber optic network. The controller 19 combines neighboring dots 11 into a dynamic pixel 18 in order to then control them as a logical unit. This control is carried out by a high-frequency repetition, preferably in the range of 100 Hz.

The displays according to the invention can also be used for interlaced signals, whereby the image is composed of an odd and an even field 24. The odd field 24 consists of lines 22 with odd digits and the even field of lines 23 with even digits. Due to the inertia of the

human eye, an image is created which is composed of two fields 24. Figure 6 shows the theoretical structure and Figure 7 shows the inventive structure with dynamic pixels 18. Other dynamic pixel shapes are also conceivable.

Reference symbol

10, 10a, 10b, 10c Display

11 Dot

12a, 12b, 12c pixels

13 red dot

14 green dot

15" blue dot 16a, 16b, 16c, 16d pixels

17 static pixels

18 dynamic pixels

19 Control

20 Network

21 Mask

22 odd row

23 even row

24 field

Claims (12)

1. Display consisting of pixels and dots and its control, characterized in that the pixels ( 18 ) are variably generated from the existing dots ( 11 , 13 , 14 , 15 ), the pixels ( 18 ) forming a dynamically generated, logical unit by grouping neighboring dots ( 11 , 13 , 14 , 15 ), so that the neighboring pixels ( 18 ) physically overlap. 2. Display according to claim 1, characterized in that the generation and control of the dynamically overlapping pixels ( 18 ) takes place at a speed that is not perceptible to the human eye. 3. Display according to claims 1 to 2, characterized in that a dynamic pixel ( 18 ) consists of at least so many dots ( 11 , 13 , 14 , 15 ) that all the basic colors predetermined by the dots ( 13 , 14 , 15 ) are contained. 4. Display according to claims 1 to 3, characterized in that a pixel ( 18 ) contains at least two different dots ( 13 ) which reproduce the primary colors. 5. Display according to claims 1 to 4, characterized in that a pixel ( 18 ) contains at least one red dot ( 13 ), one green dot ( 14 ) and one blue dot ( 15 ). 6. Display according to claims 1 to 5, characterized in that each dot ( 11 , 13 , 14 , 15 ) can be controlled individually. 7. Display according to claims 1 to 6, characterized in that the dots ( 11 , 13 , 14 , 15 ) are regularly arranged on the display. 8. Display according to claims 1 to 7, characterized in that each dot ( 11 , 13 , 14 , 15 ) is surrounded by a black mask ( 21 ). 9. Display according to claims 1 to 8, characterized in that a controller ( 19 ) generates pixels ( 18 ) which overlap one another in time by individually sequentially controlling the dots ( 11 , 13 , 14 , 15 ). 10. Display according to claims 1 to 9, characterized in that each dot ( 11 , 13 , 14 , 15 ) can be controlled analogously by the controller ( 19 ). 11. Display according to claims 1 to 9, characterized in that each dot ( 11 , 13 , 14 , 15 ) can be digitally controlled by the controller ( 19 ). 12. Display according to claims 1 to 11, characterized in that the dots ( 11 , 13 , 14 , 15 ) are connected to the controller ( 19 ) by a network ( 20 ).