Patent US5736981A successfully refreshed from Google Patents.
US5736981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display control apparatus
Assignee: Canon Inc
•
Filing: 1996-09-06
•
Granted: 1998-04-07
•
Expires: 2016-09-06
Abstract
Abstract A display control apparatus for a display device, capable of updating a display state for a display element subjected to a change in display updating, includes a display data memory for storing display data, and a display controller capable of sequentially reading out the display data stored in the memory and transferring the readout display data to the display device at a predetermined period and capable of performing a partial rewrite operation of the display data stored in the memory. A rewrite detector detects an address for accessing the display data memory to cause the display controller to perform the partial rewrite operation, a specific pattern rewrite detector detects an address of display data subjected to a rewrite operation of the specific pattern and stored in the display data memory, and a rewrite address generator preferentially transfers the address detected by the specific pattern rewrite detector over the address detected by the rewrite detector, reads out the display data from the display data memory at the transferred address, and transfers the readout data to the display device.
Inventors
- 👤 Toshiyuki Nobutani
- 👤 Masami Shimakura
- 👤 Junichi Tanahashi
- 👤 Kenichiro Ono
- 👤 Hajime Morimoto
- 👤 Tatsuya Sakashita
- 👤 Eiichi Matsuzaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:43
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3622; G09G3/3629; G09G3/364; G09G5/00; G09G5/08; G09G2310/00; G09G2310/02; G09G2310/0232; G09G2310/04; G09G2370/00; G09G2370/04; G09G2370/045; G09G3/2007; G09G3/2044; G09G3/2051; G09G3/2059; G09G3/2074
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
205 words
A display control apparatus for a display device capable of updating a display state for a display element subjected to a change in display, comprising: display data memory means for storing display data and a specific pattern in different memory areas; a display controller capable of sequentially reading out the display data stored in said display data memory means and transferring the readout display data to the display device at a predetermined period and performing a partial rewrite operation of the display data stored in said display data memory means; rewrite detecting means for detecting an address for accessing said display data memory means to cause said display controller to perform the partial rewrite operation; specific pattern rewrite detecting means for detecting a rewrite operation of the specific pattern stored in said display data memory means; and address generating means for, when said rewrite detecting means detects the address for accessing said display data memory means, generating a reading address of said display data memory means corresponding to the detected address, and when said specific pattern rewrite detecting means detects the rewrite operation of the specific pattern, generating a reading address of said display data memory means corresponding to a size of the specific pattern.
Claim 2
Dependent Claim
205 words
A display control apparatus for a display device capable of updating a display state for a display element subjected to a change in display, comprising: display data memory means for storing display data and a specific pattern in different memory areas; a display controller capable of sequentially reading out the display data stored in said display data memory means and transferring the readout display data to the display device at a predetermined period and performing a partial rewrite operation of the display data stored in said display data memory means; rewrite detecting means for detecting an address for accessing said display data memory means to cause said display controller to perform the partial rewrite operation; specific pattern rewrite detecting means for detecting a rewrite operation of the specific pattern stored in said display data memory means; and address generating means for, when said rewrite detecting means detects the address for accessing said display data memory means, generating a reading address of said display data memory means corresponding to the detected address, and when said specific pattern rewrite detecting means detects the rewrite operation of the specific pattern, generating a reading address of said display data memory means corresponding to a size of the specific pattern.
Claim 3
Dependent Claim
14 words
An apparatus according to claim 1, wherein the specific pattern includes a cursor pattern.
Claim 4
Dependent Claim
61 words
An apparatus according to claim 1, further comprising means for storing a display data flag indicating that display data has been rewritten and means for storing a specific pattern flag indicating that a specific pattern has been rewritten, wherein the specific pattern is preferentially displayed in response to the specific pattern flag being stored in said specific pattern flag storage means.
Claim 5
Dependent Claim
34 words
An apparatus according to claim 1, wherein said address generating means generates the reading address corresponding to the size of the specific pattern in preference to the reading address corresponding to the detected address.
Claim 6
Dependent Claim
45 words
An apparatus according to claim 1, further comprising control means for controlling synthesis of the specific pattern and the display data designated by the reading address generated correspondingly to the size of the specific pattern and controlling the display device to display the synthesized data.
Claim 7
Dependent Claim
13 words
An apparatus according to claim 1, wherein the display device comprises a FLCD.
Claim 8
Dependent Claim
182 words
A display control apparatus for a display device capable of updating a display state for a display element subjected to a change in display, comprising: display data memory means for storing display data and a specific pattern in different memory areas; a display controller capable of sequentially reading out the display data stored in said display data memory means and transferring the readout display data to the display device at a predetermined period and performing a partial rewrite operation of the display data stored in said display data memory means; rewrite detecting means for detecting addresses for accessing said display data memory means to cause said display controller to perform the partial rewrite operation; specific pattern rewrite detecting means for detecting an address of the display data subjected to a rewrite operation of the specific pattern in said display data memory means; and read inhibiting means for inhibiting a read operation of said display controller for display data displayed in a transparent manner on the display device among the display data whose addresses are detected by said specific pattern rewrite detecting means.
Claim 9
Dependent Claim
182 words
A display control apparatus for a display device capable of updating a display state for a display element subjected to a change in display, comprising: display data memory means for storing display data and a specific pattern in different memory areas; a display controller capable of sequentially reading out the display data stored in said display data memory means and transferring the readout display data to the display device at a predetermined period and performing a partial rewrite operation of the display data stored in said display data memory means; rewrite detecting means for detecting addresses for accessing said display data memory means to cause said display controller to perform the partial rewrite operation; specific pattern rewrite detecting means for detecting an address of the display data subjected to a rewrite operation of the specific pattern in said display data memory means; and read inhibiting means for inhibiting a read operation of said display controller for display data displayed in a transparent manner on the display device among the display data whose addresses are detected by said specific pattern rewrite detecting means.
Claim 10
Dependent Claim
14 words
An apparatus according to claim 7, wherein the specific pattern includes a cursor pattern.
Claim 11
Dependent Claim
138 words
A display control apparatus comprising: first memory means for storing display data and a specific pattern in different memory areas; rewriting means for rewriting the display data stored in said first memory means; detection means for detecting movement of a cursor on the basis of an address of the cursor; address generating means for, in response to detection of the cursor movement by said detecting means, generating an address of said memory means corresponding to a position of the cursor before the cursor movement and an address of said memory means corresponding to a position of the cursor after the cursor movement; and control means for reading the display data from said first memory means in accordance with the addresses generated by said address generating means and for controlling a display device to display the read display data.
Claim 12
Dependent Claim
138 words
A display control apparatus comprising: first memory means for storing display data and a specific pattern in different memory areas; rewriting means for rewriting the display data stored in said first memory means; detection means for detecting movement of a cursor on the basis of an address of the cursor; address generating means for, in response to detection of the cursor movement by said detecting means, generating an address of said memory means corresponding to a position of the cursor before the cursor movement and an address of said memory means corresponding to a position of the cursor after the cursor movement; and control means for reading the display data from said first memory means in accordance with the addresses generated by said address generating means and for controlling a display device to display the read display data.
Claim 13
Dependent Claim
39 words
An apparatus according to claim 9, further comprising second memory means for storing information indicating that the cursor has been moved, wherein said control means controls the display device depending on whether said second memory means stores such information.
Claim 14
Dependent Claim
24 words
An apparatus according to claim 10, wherein said second memory means stores the information in correspondence to each display line of the display device.
Claim 15
Dependent Claim
13 words
An apparatus according to claim 9, wherein the display device comprises a FLCD.
Claim 16
Dependent Claim
54 words
An apparatus according to claim 9, wherein said control means synthesizes the display data with the specific pattern and controls the display device to display the display data as synthesized with the specific pattern, when displaying the display data in accordance with the address generated corresponding to the cursor position after the cursor movement.
Claim 17
Dependent Claim
62 words
A method according to claim 9, wherein said control step synthesizes the display data with the specific pattern and controls the display apparatus to display the display data as synthesized with the specific pattern, when displaying the display data in accordance with the address generated display data in accordance with the address generated corresponding to the cursor position after the cursor movement.
Claim 18
Dependent Claim
105 words
A display control method comprising the steps of: storing display data and a specific pattern in different areas of a memory; detecting movement of a cursor of a display apparatus on the basis of an address of the cursor; generating, in response to detection of the cursor movement, an address of the memory corresponding to a position of the cursor before the cursor movement and an address of the memory corresponding to a position of the cursor after the cursor movement; reading the display data from the memory in accordance with the generated addresses; and controlling the display apparatus to display the read display data.
Claim 19
Dependent Claim
105 words
A display control method comprising the steps of: storing display data and a specific pattern in different areas of a memory; detecting movement of a cursor of a display apparatus on the basis of an address of the cursor; generating, in response to detection of the cursor movement, an address of the memory corresponding to a position of the cursor before the cursor movement and an address of the memory corresponding to a position of the cursor after the cursor movement; reading the display data from the memory in accordance with the generated addresses; and controlling the display apparatus to display the read display data.
Claim 20
Dependent Claim
13 words
A method according to claim 15, wherein the display apparatus comprises a FLCD.
Claim 21
Dependent Claim
126 words
A display control method comprising the steps: storing display data and specific pattern display data in different areas of a memory; sequentially reading out the display data stored in the memory and transferring the readout display data to a display device at a predetermined period and performing a partial rewrite operation of the display data stored in the memory; detecting addresses for accessing the display data in the memory to cause a display controller to perform a partial rewrite operation; detecting an address of the display data subjected to a rewrite operation of a specific pattern in the display data memory; and inhibiting a read operation of display data displayed in a transparent manner on the display device among the display data whose addresses are detected.
Claim 22
Dependent Claim
126 words
A display control method comprising the steps: storing display data and specific pattern display data in different areas of a memory; sequentially reading out the display data stored in the memory and transferring the readout display data to a display device at a predetermined period and performing a partial rewrite operation of the display data stored in the memory; detecting addresses for accessing the display data in the memory to cause a display controller to perform a partial rewrite operation; detecting an address of the display data subjected to a rewrite operation of a specific pattern in the display data memory; and inhibiting a read operation of display data displayed in a transparent manner on the display device among the display data whose addresses are detected.
Claim 23
Dependent Claim
150 words
A display control apparatus comprising: supply means for supplying display data; first memory means for storing the display data supplied by said supply means and a specific pattern in different memory areas; rewriting means for rewriting the display data stored in said memory means; detection means for detecting movement of a cursor on the basis of an address of the cursor; address generating means for, in response to a detection of the cursor movement by said detecting means, generating an address of said memory means corresponding to a position of the cursor before the cursor movement and an address of said memory means corresponding to a position of the cursor after the cursor movement; and control means for reading the display data from said first memory means in accordance with the addresses generated by said address generating means and for controlling a display device to display the read display data.
Claim 24
Dependent Claim
150 words
A display control apparatus comprising: supply means for supplying display data; first memory means for storing the display data supplied by said supply means and a specific pattern in different memory areas; rewriting means for rewriting the display data stored in said memory means; detection means for detecting movement of a cursor on the basis of an address of the cursor; address generating means for, in response to a detection of the cursor movement by said detecting means, generating an address of said memory means corresponding to a position of the cursor before the cursor movement and an address of said memory means corresponding to a position of the cursor after the cursor movement; and control means for reading the display data from said first memory means in accordance with the addresses generated by said address generating means and for controlling a display device to display the read display data.
Claim 25
Dependent Claim
13 words
An apparatus according to claim 18, wherein the display device comprises a FLCD.
Claim 26
Dependent Claim
54 words
An apparatus according to claim 18, wherein said control means synthesizes the display data with the specific pattern and controls the display device to display the display data as synthesized with the specific pattern, when displaying the display data in accordance with the address generated corresponding to the cursor position after the cursor movement.
References Cited (Backward Citations)
US4693563A
Cited
US4964699A
Cited
US5099331A
Cited
US5091723A
Cited
EP0361471A2
Cited
EP0368117A2
Cited
US5408247A
Cited
US5289173A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-04-06 | 2001-10-06 | 2002-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-04-06 | 2005-10-06 | 2006-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-04-06 | 2009-10-06 | 2010-04-07 | $7700.00 | Window Closed / Lapsed |