US4779083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display control system
Assignee: Yamaha Corp
•
Filing: 1986-01-31
•
Granted: 1988-10-18
•
Expires: 2006-01-31
Abstract
Abstract A display control system can implement a gray-scale display of an image composed of a plurality of display dots on a display screen. A plurality of luminance data each representing an intensity level of a corresponding one of the plurality of display dots are first generated. Each luminance data is then converted into a pulse signal whose pulse number corresponds to an intensity level of the corresponding display dot represented by the luminance data. And, each display dot on the display screen is activated in accordance with a corresponding one of the thus produced pulse signals. To eliminate flicker of the display dots, the display dots on the display screen are grouped into a plurality of display sections each composed of a predetermined number of adjacent display dots, and if the display dots in one display section are equal in intensity level, these display dots are activated by the pulse signals which are equal in pulse-number but different in phase.
Inventors
- 👤 Takatoshi Ishii
- 👤 Makoto Kaneko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:25
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; H04N3/12; H04N3/127; G; G06; G06T; G06T3/00; G06T3/40; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3622; G09G3/3644; G09G3/3685; G09G3/2007; G09G3/2018
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
214 words
A display control system for displaying an image composed of a plurality of display dots provided on a display screen, the plurality of display dots on the display screen being grouped into a plurality of display sections, each of which has an equal number of display dots and each of said display sections including at least two adjacent display dots, comprising: (a) luminance data generating means for generating a plurality of luminance data, each representing an intensity level of a respective one of the plurality of display dots on the display screen; (b) conversion means, coupled to said luminance data generating means for converting each said luminance data from said luminance data generating means into a pulse signal whose pulse number corresponds to an intensity level represented by said each luminance data such that those of said pulse signals for activating display dots in a same display section are indentical in pulse number but substantially different in phase from one another when luminance data representative of intensity levels of said display dots in the same display section are identical to one another; and (c) activation means for activating each of the plurality of display dots on the display screen in accordance with a respective one of the pulse signals fed from said conversion means.
Claim 2
Dependent Claim
214 words
A display control system for displaying an image composed of a plurality of display dots provided on a display screen, the plurality of display dots on the display screen being grouped into a plurality of display sections, each of which has an equal number of display dots and each of said display sections including at least two adjacent display dots, comprising: (a) luminance data generating means for generating a plurality of luminance data, each representing an intensity level of a respective one of the plurality of display dots on the display screen; (b) conversion means, coupled to said luminance data generating means for converting each said luminance data from said luminance data generating means into a pulse signal whose pulse number corresponds to an intensity level represented by said each luminance data such that those of said pulse signals for activating display dots in a same display section are indentical in pulse number but substantially different in phase from one another when luminance data representative of intensity levels of said display dots in the same display section are identical to one another; and (c) activation means for activating each of the plurality of display dots on the display screen in accordance with a respective one of the pulse signals fed from said conversion means.
Claim 3
Dependent Claim
65 words
A display control system according to claim 1, wherein those of said pulse signals for activating those of the display dots which are included respectively in different display sections but disposed at corresponding positions in said different display sections are identical in number and phase to one another if luminance data representative of intensity levels of said those of the display dots are the same.
Claim 4
Dependent Claim
71 words
A display control according to claim 1, wherein said conversion means comprises conversion circuits equal in number to the display dots of each display section, each of said conversion circuits corresponding to a respective one of the display dots of each of said display sections, and converting those of said luminance data representing intensity levels of the respective ones of the display dots of said display sections into the pulse signals.
Claim 5
Dependent Claim
51 words
A display control system according to claim 1, wherein said luminance data generating means comprises memory means for storing color data each representative of a color of a respective one of the display dots on the display screen, and data conversion means for converting said color data into said luminance data.
Claim 6
Dependent Claim
105 words
A display control system according to claim 1, wherein the image composed of the plurality of display dots is displayed on the display screen in a scanning manner, and wherein said conversion means converting each luminance data into the corresponding pulse signal using a predetermined number of frame cycles of the scanning of the display screen, said conversion means determining in each frame cycle in accordance with said each luminance data whether a pulse is to be outputted as said pulse signal, said activation means sequentially activating the display dots on the display screen in accordance with said pulse signals fed from said conversion means.
References Cited (Backward Citations)
US3886403A
Cited
US4021607A
Cited
US3883778A
Cited
US4087792A
Cited
US4149111A
Cited
US4353062A
Cited
US4286195A
Cited
US4378556A
Cited
US4385293A
Cited
US4559535A
Cited
US4622549A
Cited
US4595919A
Cited
US4707638A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-18 | 1992-04-18 | 1992-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-18 | 1996-04-18 | 1996-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-18 | 2000-04-18 | 2000-10-18 | $7700.00 | Window Closed / Lapsed |