US 11,380,250 B1 · Display apparatus having a self-luminous pixel module and a first non-self-luminous pixel module driven by a pulse width modulation driving circuit

Abstract

A display apparatus has a self-luminous pixel module, a first non-self-luminous pixel module, and a pulse width modulation (PWM) driving circuit. The self-luminous pixel module has a plurality of self-luminous pixels. The first non-self-luminous pixel module is disposed on the self-luminous pixel module and has a plurality of first non-self-luminous pixels. The self-luminous pixel module of the display apparatus is used as a backlight for the non-self-luminous pixel module. The PWM driving circuit provides first PWM signals to the self-luminous pixel module to control values of brightness of the self-luminous pixels and provides second PWM signals to the first non-self-luminous pixel module to control values of transmittance of the first non-self-luminous pixels.

Claims18

Dependent claims

A display apparatus, comprising:

a self-luminous pixel module comprising a plurality of self-luminous pixels;
a first non-self-luminous pixel module, disposed on the self-luminous pixel module, and comprising a plurality of first non-self-luminous pixels;
a pulse width modulation (PWM) driving circuit configured to provide first PWM signals to the self-luminous pixel module to control brightness of the self-luminous pixels and provide second PWM signals to the first non-self-luminous pixel module to control transmittance of the first non-self-luminous pixels;
and
a second non-self-luminous pixel module disposed on the first non-self-luminous pixel module and comprising a plurality of second non-self-luminous pixels, wherein the PWM is further configured to provide third PWM signals to the second non-self-luminous pixel module to control transmittance of the second non-self-luminous pixels.

2 more elements

A display apparatus, comprising:

a self-luminous pixel module comprising a plurality of self-luminous pixels;
a first non-self-luminous pixel module, disposed on the self-luminous pixel module, and comprising a plurality of first non-self-luminous pixels;
and
a pulse width modulation (PWM) driving circuit configured to provide first PWM signals to the self-luminous pixel module to control brightness of the self-luminous pixels and provide second PWM signals to the first non-self-luminous pixel module to control transmittance of the first non-self-luminous pixels;
wherein the self-luminous pixels and the first non-self-luminous pixels form a plurality of pixel groups, each pixel group comprises one of the self-luminous pixels and two of the first non-self-luminous pixels, and the self-luminous pixel and the two first non-self-luminous pixels of the each pixel group form a first display pixel and a second display pixel;
and
wherein a gray level Gp1 of the first display pixel is expressed as:
G
p
⁢
1
=
B
S
2
⁡
[
D
N
⁢
1
·
T
N
+
(
D
S
⁢
1
+
D
S
⁢
2
-
D
N
⁢
1
)
·
T
COM
]
,
and a gray level Gp2 of the second display pixel is expressed as:
G
p
⁢
2
=
B
S
2
⁡
[
D
N
⁢
2
·
T
N
+
(
D
S
⁢
1
+
D
S
⁢
2
-
D
N
⁢
2
)
·
T
COM
]
,
where BS is brightness of the self-luminous pixel of the pixel group when a first voltage is applied to the self-luminous pixel of the pixel group, DN1 is a duty cycle of a second voltage applied across a first non-self-luminous pixel of the first display pixel, DN2 is a duty cycle of the second voltage applied across a first non-self-luminous pixel of the second display pixel, TN is transmittance of the two first non-self-luminous pixels of the pixel group when the second voltage is applied across the two first non-self-luminous pixels of the pixel group, DS1 is a duty cycle of the first voltage in a first scanning period, DS2 is a duty cycle of the first voltage in a second scanning period, and TCOM is transmittance of the two first non-self-luminous pixels of the pixel group when a voltage difference between electrodes of the two first non-self-luminous pixel of the pixel group is zero.

84 more elements

A display apparatus, comprising:

a self-luminous pixel module comprising a plurality of self-luminous pixels;
a first non-self-luminous pixel module, disposed on the self-luminous pixel module, and comprising a plurality of first non-self-luminous pixels;
and
a pulse width modulation (PWM) driving circuit configured to provide first PWM signals to the self-luminous pixel module to control brightness of the self-luminous pixels and provide second PWM signals to the first non-self-luminous pixel module to control transmittance of the first non-self-luminous pixels;
wherein the self-luminous pixels and the first non-self-luminous pixels form a plurality of pixel groups, each pixel group comprises one of the self-luminous pixels and a non-self-luminous pixel array, the non-self-luminous pixel array comprises m rows and n columns of the first non-self-luminous pixels, m and n are integers greater than 1, and the self-luminous pixel and the non-self-luminous pixel array form a plurality of display pixels arranged in m rows and n columns;
and
wherein a gray level Gp(i,j) of a first display pixel of the display pixels is expressed as:
G
p
⁡
(
i
,
j
)
=
B
S
m
⁡
[
D
N
⁡
(
i
,
j
)
·
T
N
+
(
∑
k
=
1
m
⁢
D
S
⁡
(
k
)
-
D
N
⁡
(
i
,
j
)
)
·
T
COM
]
,
where the first display pixel is located at an ith row and a jth column of the display pixels, BS is brightness of a self-luminous pixel of the first display pixel when a first voltage is applied to the self-luminous pixel of the first display pixel, DN(i,j) is a duty cycle of a second voltage applied across a first non-self-luminous pixel of the first display pixel, TN is transmittance of the first non-self-luminous pixel of the first display pixel when the second voltage is applied across the first non-self-luminous pixel of the first display pixel, DS(k) is a duty cycle of the first voltage in a kth scanning period, and TCOM is transmittance of the first non-self-luminous pixel of the first display pixel when a voltage of zero volts is applied across the first non-self-luminous pixel of the first display pixel.

59 more elements

Dependencies are inferred from the claim text.

Display apparatus having a self-luminous pixel module and a first non-self-luminous pixel module driven by a pulse width modulation driving circuit

Life of this patent

Display apparatus having a self-luminous pixel module and a first non-self-luminous pixel module driven by a pulse width modulation driving circuit

Life of this patent

Abstract

Claims18