US6597372B2
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Temporal light modulation technique and apparatus
Assignee: Intel Corp
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Filing: 2002-09-23
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Granted: 2003-07-22
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Expires: 2022-09-23
Abstract
Abstract A method includes providing pulse width modulated signals. Each pulse width modulated signal is associated with a different bit, and the bits are arranged in an order to indicate an intensity of a pixel cell. Different frequencies are established for at least two of the pulse width modulated signals. Based on the logical states of the bits, the pulse width modulated signals are combined to form another signal, and the pixel cell is driven with this other signal.
Inventors
- 👤 Samson Huang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:46
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3685; G09G3/3688; G09G3/2007; G09G3/2014; G09G3/2077; G09G3/3614
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
35 words
A method comprising: providing pulse width modulated signals; establishing different frequencies for at least two of the pulse width modulated signals; and driving a pixel cell with a combination of the pulse width modulated signals.
Claim 2
Independent Claim
35 words
A method comprising: providing pulse width modulated signals; establishing different frequencies for at least two of the pulse width modulated signals; and driving a pixel cell with a combination of the pulse width modulated signals.
Claim 3
Dependent Claim
29 words
The method of claim 1 , wherein each pulse width modulated signal is associated with a different bit of a value indicative of an intensity of the pixel cell.
Claim 4
Dependent Claim
63 words
The method of claim 2 , wherein the establishing different frequencies comprises: establishing a lower frequency for one of the pulse width modulated signals that is associated with one of the bits that has a lower order; and establishing a higher frequency for one of the pulse width modulated signals that is associated with one of the bits that has a higher order.
Claim 5
Dependent Claim
49 words
The method of claim 2 , wherein the establishing different frequencies comprises: establishing lower frequencies for the pulse width modulated signals that are associated with bits that have lower orders; and establishing higher frequencies for the pulse width modulated signals that are associated with bits that have higher orders.
Claim 6
Dependent Claim
15 words
The method of claim 1 , the pulse width modulated signals have different duty cycles.
Claim 7
Dependent Claim
18 words
The method of claim 5 , wherein the duty cycles are binarily weighted with respect to each other.
Claim 8
Independent Claim
43 words
An apparatus comprising: a pixel cell; a first circuit to provide pulse width modulated signals, at least two of the pulse width modulated signals having different frequencies; and a second circuit to combine the pulse width modulated signals to drive the pixel cell.
Claim 9
Independent Claim
43 words
An apparatus comprising: a pixel cell; a first circuit to provide pulse width modulated signals, at least two of the pulse width modulated signals having different frequencies; and a second circuit to combine the pulse width modulated signals to drive the pixel cell.
Claim 10
Dependent Claim
30 words
The apparatus of claim 7 , wherein each of the pulse width modulated signals is associated with a bit of a value indicative of an intensity of the pixel cell.
Claim 11
Dependent Claim
61 words
The apparatus of claim 8 , wherein the first circuit establishes a lower frequency for one of the pulse width modulated signals that is associated with one of the bits that has a lower order and establishes a higher frequency for one of the pulse width modulated signals that is associated with one of the bits that has a higher order.
Claim 12
Dependent Claim
47 words
The apparatus of claim 8 , wherein the first circuit establishes lower frequencies for the pulse width modulated signals that are associated with bits that have lower orders and establishes higher frequencies for the pulse width modulated signals that are associated with bits that have higher orders.
Claim 13
Dependent Claim
16 words
The apparatus of claim 7 , wherein the pulse width modulated signals have different duty cycles.
Claim 14
Dependent Claim
18 words
The apparatus of claim 11 , wherein the duty cycles are binarily weighted with respect to each other.
Claim 15
Independent Claim
64 words
A method comprising: providing pulse width modulated signals to indicate different bits of an intensity value for a pixel cell; using a first set of the pulse width modulated signals to update the pixel cell at a first rate; and using a second set of the pulse width modulated signals to update the pixel cell at a second rate different from the first rate.
Claim 16
Independent Claim
64 words
A method comprising: providing pulse width modulated signals to indicate different bits of an intensity value for a pixel cell; using a first set of the pulse width modulated signals to update the pixel cell at a first rate; and using a second set of the pulse width modulated signals to update the pixel cell at a second rate different from the first rate.
Claim 17
Independent Claim
41 words
The method of 13 , wherein the first set of pulse width modulated signals is associated with lesser significant bits of the value and the second set of pulse width modulated signals is associated with higher significant bits of the value.
Claim 18
Independent Claim
41 words
The method of 13 , wherein the first set of pulse width modulated signals is associated with lesser significant bits of the value and the second set of pulse width modulated signals is associated with higher significant bits of the value.
Claim 19
Dependent Claim
32 words
The method of claim 14 , wherein the pulse width modulated signals of the first set have lower frequencies and the pulse width modulated signals of the second set have higher frequencies.
Claim 20
Dependent Claim
17 words
The method of claim 13 , wherein the bits are binarily weighted with respect to each other.
References Cited (Backward Citations)
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