EP1971977A1 - Affichage de symboles statiques sur un ecran matriciel - Google Patents
Affichage de symboles statiques sur un ecran matricielInfo
- Publication number
- EP1971977A1 EP1971977A1 EP07703764A EP07703764A EP1971977A1 EP 1971977 A1 EP1971977 A1 EP 1971977A1 EP 07703764 A EP07703764 A EP 07703764A EP 07703764 A EP07703764 A EP 07703764A EP 1971977 A1 EP1971977 A1 EP 1971977A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- zone
- screen
- point
- display
- storage means
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000011159 matrix material Substances 0.000 title claims abstract description 22
- 230000003068 static effect Effects 0.000 title claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 12
- 230000000717 retained effect Effects 0.000 claims abstract description 5
- 230000015654 memory Effects 0.000 claims description 26
- 230000000295 complement effect Effects 0.000 description 2
- 230000001143 conditioned effect Effects 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000008672 reprogramming Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
- G09G5/022—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed using memory planes
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/42—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of patterns using a display memory without fixed position correspondence between the display memory contents and the display position on the screen
Definitions
- the invention relates to a device and a method for displaying symbols on a matrix screen.
- Many applications require the display of symbols to inform a user.
- each zone comprising one or more segments depending on the symbols that it is desired to display in the zone.
- displays are known in which each zone has 7 segments and makes it possible to display any number in each zone.
- Dedicated displays lack flexibility in their use. For example, it is not possible to change the size of a zone and the number of segments it contains without developing a new screen. Moreover, nothing can be displayed in the space between the segments.
- a matrix screen which is not dedicated by design to a type of frozen display.
- This type of screen is organized in rows and columns. Each intersection of a line and a column forms a display point. This screen has no predetermined zone.
- a graphical processor-based architecture is used, for example used in technologies developed for micro-computing. This type of architecture makes it possible to generate moving images and is therefore oversized for displaying symbols.
- this architecture is much more complex than that used to control a dedicated screen. It is, therefore, much more expensive, its power consumption is higher and its reliability is lower.
- the invention aims to overcome the problems mentioned above by proposing the use of a matrix screen, that is to say not dedicated, without using an architecture using graphics processor to display symbols.
- the subject of the invention is a device for displaying symbols on a matrix screen, characterized in that it comprises means for storing a plurality of static zones of the screen and of several symbols to be displayed in each zone. the definition of the symbols being specific to each zone, an area table defining the symbol to be displayed for each zone and means for controlling a display of each point of the matrix according to the symbol retained in the zone table, and belonging of the point to a given area determined by the storage means.
- the storage means advantageously comprise a non-volatile memory such as for example a read-only programmable memory well known in the Anglo-Saxon literature under the name of "PROM".
- a non-volatile memory such as for example a read-only programmable memory well known in the Anglo-Saxon literature under the name of "PROM”.
- PROM read-only programmable memory
- Numerous types of read-only memories can be used to implement the invention, such as electrically programmable read-only memories, erasable read-only memories by means of ultraviolet radiation, programmable read-only memories quickly well known in the literature.
- FlashPROM FlashPROM
- the invention also relates to a symbol display method on a matrix screen, the method using a device as described above, characterized in that it consists for each point of the screen to: • Determine the area at which the point belongs using the memory means,
- FIG. 1 represents an example of a screen in which areas have been defined
- Figure 2 shows symbols displayed on the screen of Figure 1
- FIG. 3 represents a device according to the invention
- Figure 4 shows an example of a zone table.
- FIG. 1 represents an example of a screen in which areas have been defined
- Figure 2 shows symbols displayed on the screen of Figure 1
- FIG. 3 represents a device according to the invention
- Figure 4 shows an example of a zone table.
- FIG. 1 represents a matrix screen 1 on which two zones 2, 3 and a screen are represented.
- the contours of zones 2 and 3 are represented in strong lines.
- a zone according to the invention is a set of points of the matrix in which it is desired to display an image.
- An area has a fixed location on the screen, hence the static qualifier for the areas defined on the screen.
- the points of an area may not be contiguous.
- the different areas can not overlap. In other words, a point on the screen belongs to only one zone.
- the wallpaper also forms an area that must also be controlled. For example, all the points forming the wallpaper can be turned off.
- the device represented in FIG. 3 comprises the screen 1, a central sequencer 10 making it possible to control the display on the screen 1, storage means 11 for several areas of the screen and several symbols to be displayed in each zoned.
- These storage means advantageously comprise a non-volatile memory connected to the central sequencer 10.
- nonvolatile memory is meant a memory that stores the information it contains even in the absence of a power supply. This type of memory is often called a ROM.
- the central sequencer 10 can be implemented by means of a programmable logic component well known in the English literature under the FPGA name. It is also possible to make this sequencer using discrete components or even by means of a microprocessor.
- the non-volatile memory is made using a read-only programmable fast memory well known in the English literature under the name FlashPROM.
- the device further comprises a zone table 12 also connected to the central sequencer 10.
- the display of each point of the matrix is defined according to the symbol retained in the zone table 12, the membership to a given area, determined by the storage means 1 1.
- the membership of a zone is conditioned by the position of the current point in the matrix of the screen.
- a display method using the device described above consists for each point of the screen 1 to:
- the generation of the display of a point is done using the storage means 1 1 and the storage of each symbol comprises the state of each point of the zone considered.
- the state of a point is for example turned on or off in the case of a monochrome screen.
- the state can also set the color of a point in the case of a color screen.
- the address is determined in the storage means 11 where the current point status information, for example on or off, is located, depending on the position of the current point on the matrix of the screen 1 and data in the zone table 12.
- the addressing of the storage means is defined by a counter of the points of the matrix screen 1, for example for the least significant bits of the addressing and by the information elements.
- Area table 12 contains the symbol for the area to which the current point belongs. From the symbol read in the zone table 12, the storage means 1 1 searches for the status information of the current point among the possible symbols stored in the storage means 11.
- the zone table 12 is generated according to the image that one wishes to see on the screen 1.
- the zone table 12 is advantageously stored in a random access memory, for example of the random access type well known in the English literature under the name of RAM.
- a random access memory is used in which a display information is generated and stored for each point of the screen 1.
- the invention generates and stores in the RAM zone table 12 which includes only global display information per zone. The invention makes it possible to very clearly reduce the size of the random access memory used for the display on the screen 1.
- FIG. 4 provides a better understanding of the organization of a zone table 12.
- the table 12 is organized so as to define a symbol to be displayed in a given zone.
- each zone is identified by a number and the number of the zone to which the current point belongs forms an address 13 of the random access memory and the data 14 of the random access memory associated with the address 13 defines a variation of the symbol of the considered area.
- the data 14 of the RAM gives an additional address to find the states of the points to be displayed.
- This complement of address associated with a counter, internal to the central sequencer 10, which points to the position of the current point makes it possible to determine the address in storage means 1 1 where is located the state information of the current point.
- zones 2 and 3 are represented in address 13.
- Data 14 gives a retained variation of symbol for the zone considered. For example, a given 14 5 bits wide, the zone could display Users 2 5 ie 32 different symbols.
- this data item 14 constitutes a complement of address on the one hand and the memory contains a space on the theoretical 32 for the identification of the area of membership on the other hand, in fact there are 31 symbols different by zone.
- the data item 14 contains 3 additional bits making it possible to multiply by eight the number of symbols, therefore in all 248 different possible symbols per zone.
- These 248 symbols are all small fields of pixels that can take any value and constitute alphabetic characters, numbers or pictograms.
- the zones are independent of each other.
- the variations of one zone may be different from the variations of another zone.
- the definition of the symbols is specific to each zone. For example, if the variations of one zone make it possible to display alphabetic characters, another zone can make it possible to display numerical characters or pictograms.
- a symbol of a zone can only be displayed in this zone except of course to be defined a new time in another zone.
- a display method using the device described above consists in linking and repeating for each point of the screen 1 the following operations: a first page of the memory means 1 1 is addressed with the aid of a dot position counter of the screen 1, the zone table 12 is addressed by means of the data extracted from the storage means 1 1 by means of a dot position counter of the screen 1, the storage means 1 1 are addressed by means of the data extracted from the zone table 12, a display state of the point is defined by the data extracted from the storage means 1 1 at the address obtained by the data of the zone table 12.
- the addressing of the first page of the memory means 1 1 consists for example of the least significant bits in the addressing of the storage means 1 1 and the most significant bits of this page being all at a fixed value, for example at zer o.
- the addressing of the storage means 1 1 with the aid of the data extracted from the zone table 12 constitutes the most significant bits in the addressing of the means of storage 1 1 in addition to the low-order bits previously used.
- a first part only of the data item 14 extracted from the zone table 12 suffices to address the storage means 11 and the data extracted from the zone table 12 is demultiplexed by means of a second part of the data item 14 extracted from the zone table 12.
- the data of the zone table has by example an eight-bit width.
- the first of the data 14 of the zone table 12 uses five bits. There remains three bits of the data 14 to demultiplex the data extracted from the memory means 1 1.
- the implementation of the invention makes it possible to use only a RAM of very small capacity, the shape of the zones and symbols being stored in a non-volatile memory. Nevertheless, it is easy to modify the zones and symbols by reprogramming the non-volatile memory without changing the electronic components used to implement the device. This finds, for example, a particular utility when one wants to provide a display device in different countries using different languages.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Controls And Circuits For Display Device (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0600203A FR2896075B1 (fr) | 2006-01-10 | 2006-01-10 | Dispositif et procede d'affichage de symboles statiques sur un ecran matriciel |
PCT/EP2007/050217 WO2007080173A1 (fr) | 2006-01-10 | 2007-01-10 | Affichage de symboles statiques sur un ecran matriciel |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1971977A1 true EP1971977A1 (fr) | 2008-09-24 |
EP1971977B1 EP1971977B1 (fr) | 2010-08-11 |
Family
ID=36928356
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07703764A Active EP1971977B1 (fr) | 2006-01-10 | 2007-01-10 | Affichage de symboles statiques sur un écran matriciel |
Country Status (5)
Country | Link |
---|---|
US (1) | US20100321392A1 (fr) |
EP (1) | EP1971977B1 (fr) |
DE (1) | DE602007008356D1 (fr) |
FR (1) | FR2896075B1 (fr) |
WO (1) | WO2007080173A1 (fr) |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4007327A (en) * | 1975-07-30 | 1977-02-08 | Compagnie Industrielle Des Telecommunications Cit-Alcatel | Apparatus for selectively altering image data for CRT display in order to facilitate image analysis |
US4189728A (en) * | 1977-12-20 | 1980-02-19 | Atari, Inc. | Apparatus for generating a plurality of moving objects on a video display screen utilizing associative memory |
US4163229A (en) * | 1978-01-18 | 1979-07-31 | Burroughs Corporation | Composite symbol display apparatus |
FR2496368B1 (fr) * | 1980-12-12 | 1985-11-29 | Texas Instruments France | Procede et dispositif pour la visualisation de messages transmis par un signal du type television, sur un dispositif d'affichage a trame balayee tel qu'ecran d'un tube a rayons cathodiques, ledit message comportant des elements repetitifs. |
FR2566949B1 (fr) * | 1984-06-29 | 1986-12-26 | Texas Instruments France | Systeme d'affichage d'images video sur un ecran a balayage ligne par ligne et point par point |
GB8908322D0 (en) * | 1989-04-13 | 1989-06-01 | Stellar Communicat Ltd | Display |
US5761340A (en) * | 1993-04-28 | 1998-06-02 | Casio Computer Co., Ltd. | Data editing method and system for a pen type input device |
US6995779B1 (en) * | 1998-01-29 | 2006-02-07 | Rohm Co., Ltd. | Driving device for a display |
JP2007529821A (ja) * | 2004-03-15 | 2007-10-25 | トムソン ライセンシング | 効率的なビデオのリサンプリング方法 |
-
2006
- 2006-01-10 FR FR0600203A patent/FR2896075B1/fr not_active Expired - Fee Related
-
2007
- 2007-01-10 WO PCT/EP2007/050217 patent/WO2007080173A1/fr active Application Filing
- 2007-01-10 EP EP07703764A patent/EP1971977B1/fr active Active
- 2007-01-10 US US12/160,491 patent/US20100321392A1/en not_active Abandoned
- 2007-01-10 DE DE602007008356T patent/DE602007008356D1/de active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2007080173A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2007080173A1 (fr) | 2007-07-19 |
EP1971977B1 (fr) | 2010-08-11 |
FR2896075A1 (fr) | 2007-07-13 |
US20100321392A1 (en) | 2010-12-23 |
DE602007008356D1 (de) | 2010-09-23 |
FR2896075B1 (fr) | 2008-05-16 |
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