EP0709823A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Panel type color display device and system for processing image information
Assignee: TRI-LIGHT INVESTMENT Ltd
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Filing: 1995-10-23
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Granted: —
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Expires: 2015-10-23
Abstract
Abstract According to the panel type color display device of the present invention, the image information is converted into the serial data in which the color data of colors R, G, and B are sequentially switched within the video frame, and the image data for one screen are repetitively overwritten in the respective color frames of R, G, and B at the time period of the display frame, and the liquid crystal is intermittently driven plural times. Thus, the high-speed response and the large responding quantity of the liquid crystal can be surely obtained comparing with the case of continuously driving the liquid crystal. As a result, the video with high contrast can be realized in respective short color frames, and the gradation difference can be expressed by regulating the number of repetitive overwriting.
Inventors
- 👤 Kuniaki Miyazawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 20:28
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3406; G09G3/3685; G09G2310/00; G09G2310/02; G09G2310/0235; G09G3/2007; G09G3/2018
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
171 words
A panel type color display device of the class wherein there are provided a display portion consisting of a plurality of pixels which are driven in response to the image information to vary the light transmittance thereof, and backlight sources of which each can be independently on-off controlled and is assigned to emit a color light in red(R), green(G), or blue(B), said display, characterized in that said display device is provided with: means for converting the color image information into the serial data in which the image information of respective colors R, G, and B is sequentially switched at a predetermined time period, means for converting said serial data of colors R, G, and B within said respective time periods into the plotting data of colors R, G, and B which drive a plurality of pixels existing within a predetermined range, and means for repetitively driving a plurality of pixels existing in said predetermined range within said respective time periods based on said plotting data of colors R, G, and B.
Claim 2
Dependent Claim
54 words
A display device as claimed in claim 1, characterized in that said display device is further provided with means for controlling the number of repetitive driving of a plurality of pixels existing in said predetermined range within said respective time periods in correspondence with the gradation information that is obtained from said image information.
Claim 3
Dependent Claim
24 words
A display device as claimed in claim 1, characterized in that said display device is a liquid crystal display device adopting the STN system.
Claim 4
Dependent Claim
247 words
A panel type color display device of the class wherein there are provided a display portion consisting of a plurality of pixels which are driven in response to the image information to vary the light transmittance thereof, and backlight sources of which each can be independently on-off controlled and is assigned to emit a color light in R, G, or B, charcterized in that said display device is provided with: means for converting the color image information into the serial data in which the image information of respective colors R, G, and B is sequentially switched at a predetermined time period, a first data bus means for parallelly developing said serial data of colors R, G, and B within said respective time period into the serial data of L (integer), a memory means for storing the plotting data of L of which each consists of the pixel information of M x N (integer), by simultaneously writing the parallel data of L corresponding to each pixel to the addresses of L, means for selecting the plotting data of K (integer) from said plotting data of L, a second data bus means for reading out the selected plotting data of K from said memory means by the pixel information of M at a time in N installments, and means for driving the pixels of M x N existing in a predetermined range K times within said time period by means of the plotting data of K as read out.
Claim 5
Dependent Claim
34 words
A display device as claimed in claim 4, characterized in that said selecting means determines the number K of selecting said plotting data corresponding to the gradation information as obtained from said image information.
Claim 6
Dependent Claim
24 words
A display device as claimed in claim 4, characterized in that said display device is a liquid crystal display device adopting the STN system.
Claim 7
Dependent Claim
259 words
A panel type color display device of the class wherein there are provided a display portion consisting of a plurality of pixels which are driven in response to the image information to vary the light transmittance thereof, and backlight sources of which each can be independently on-off controlled and is assigned to emit a color light in R, G, or B, characterized in that said display device is provided with: means for converting the color image information into the serial data in which the image information of respective colors R, G, and B is sequentially switched at a predetermined time period, a first data bus means for parallelly developing said serial data of colors R, G, and B within said respective time period into the number of all the gradations (L) as requested, a memory means for storing the plotting data of L (integer) consisting of the pixel information of M x N (integer), by simultaneously writing the parallel data of L corresponding to each pixel to the addresses of L, means for selecting the plotting data of K (integer) from said plotting data of L, a second data bus means for reading out the plotting data having the gradation number (K) requested to the plotting data to be read out from said memory means by the pixel information of M at a time in N installments, and means for driving the pixels of M x N existing in a predetermined range K times within said time period by means of the plotting data of K as read out.
Claim 8
Dependent Claim
24 words
A display device as claimed in claim 7, characterized in that said display device is a liquid crystal display device adopting the STN system.
Claim 9
Independent Claim
59 words
A system for processing the image information, characterized in that in case the image information is processed through a memory having at least 3 addresses of which areas are different from one another, only all the addresses in the data area to be parallelly developed are made effective while the data as designated by remaining address are parallelly processed.
Claim 10
Dependent Claim
42 words
A system as claimed in claim 9, characterized in that the data area of which all the addresses are to be made effective, is made different depending on whether the operation is for writing the data or for reading out the same.
References Cited (Backward Citations)
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