No.
`1P
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`1.1
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`1.2
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`1.3
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`1.4
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`1.5
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`U.S. Patent No. 7,868,880 - Claims Listing
`Limitation
`A display apparatus for displaying image information corresponding to
`display data, comprising:
`a display panel including a plurality of display pixels arranged thereon in
`vicinities of respective intersections of a plurality of scanning lines
`arranged in a row direction and a plurality of data lines arranged in a
`column direction;
`a plurality of bias lines provided on the display panel along the scanning
`lines, respectively;
`a scanning drive unit which sequentially applies a scanning signal to
`each of said plurality of scanning lines and sets the display pixels
`corresponding to each said scanning line to a selection state;
`a data drive unit which generates a gradation signal corresponding to the
`display data and supplies the gradation signal to the display pixels set to
`the selection state;
`a power source drive unit which supplies to the display pixels a drive
`voltage for controlling a drive state of each of the display pixels;
`a state setting unit; and
`a drive control unit which controls the power source drive unit to operate
`to set the display pixels to a non-display operation state during a non-
`display period in which the display pixels do not display the display
`data, and controls the scanning drive unit to operate to set the display
`pixels to the selection state during the non-display period,
`1.7.2 wherein each of the plurality of display pixels comprises an optical
`element and a display drive circuit which controls an operation of the
`optical element, the display drive circuit comprising an electric charge
`accumulation circuit which holds a voltage component corresponding to
`the gradation signal, a supply control circuit which generates a drive
`current having a predetermined current value based on the voltage
`component held in the electric charge accumulation circuit, and which
`supplies the drive current to the optical element, and a writing control
`circuit which controls a supply state of electric charges, based on the
`gradation signal, to the electric charge accumulation circuit, and
`1.7.3 wherein the state setting unit eliminates a bias state set corresponding to
`the display data based on the gradation signal to the display drive circuit
`of the display pixels in each row, generates a setting signal for setting a
`specific bias state, applies the setting signal to each of the bias lines, and
`
`1.6
`1.7.1
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`Petitioner Samsung Ex. 1002 - Page 1 of 10
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`2P
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`2.1
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`2.2
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`applies the setting signal to the display pixels for each row of the display
`panel.
`
` A drive control method of controlling a display apparatus to display
`image information corresponding to display data, wherein the display
`apparatus comprises a display panel including a plurality of display
`pixels arranged thereon in vicinities of intersections of a plurality of
`scanning lines arranged in a row direction and a plurality of data lines
`arranged in a column direction, and each of the plurality of display
`pixels has an optical element and a display drive circuit which controls
`an operation of the optical element, the method comprising:
`sequentially setting the display pixels to a selection state, row by row;
`
`sequentially supplying a gradation signal corresponding to the display
`data to the display pixels in each row set to the selection state;
`
`setting each of the display pixels to a display operation state with said
`display pixels in a bias state corresponding to the gradation signal; and
`
`in a non-display period including a period in which the display pixels are
`set to a selection state, setting the display pixels to a non-display
`operation state in which the display data is not displayed,
`
`2.4.2 wherein the setting the display pixels to the display operation state is
`performed by applying to the display drive circuit a first voltage for
`setting the optical element to a forward bias state, and by holding a
`voltage component corresponding to the gradation signal in the display
`drive circuit, and
`
`2.4.3 wherein the setting of each display pixel to the non-display operation
`state comprises setting a specific bias state by eliminating the bias state
`set, corresponding to the gradation signal, to the display drive circuit of
`the display pixel.
`
`
`A display apparatus for displaying image information corresponding to
`display data, comprising:
`a display panel including a plurality of display pixels arranged thereon in
`vicinities of respective intersections of a plurality of scanning lines
`
`
`3P
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`2.3
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`2.4.1
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`3.1
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`Petitioner Samsung Ex. 1002 - Page 2 of 10
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`

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`3.2
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`3.3
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`3.4
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`arranged in a row direction and a plurality of data lines arranged in a
`column direction;
`a scanning drive unit which sequentially applies a scanning signal to
`each of said plurality of scanning lines and sets the display pixels
`corresponding to each said scanning line to a selection state;
`a data drive unit which generates a gradation signal corresponding to the
`display data and supplies the gradation signal to the display pixels set to
`the selection state;
`a power source drive unit which supplies to the display pixels a drive
`voltage for controlling a drive state of each of the display pixels; and
`a drive control unit which sets a period including a select period in
`which the scanning drive unit sets the display pixels to the selection state
`as a non-display period in which the display pixels do not display the
`display data, and controls a voltage value of the drive voltage supplied
`from the power source drive unit to set the display pixels to a non-
`display operation state during the non-display period,
`3.5.2 wherein each of the plurality of display pixels has an optical element and
`a display drive circuit which controls an operation of the optical element,
`the display drive circuit having a first switch circuit including a control
`terminal and a conduction channel having a first end and a second end,
`the drive voltage being applied to the first end of the conduction channel,
`a first end of the optical element being connected to the second end of
`the conduction channel, and a second end of the optical element being
`set to a given potential.
`
`The display apparatus according to claim 3, wherein the power source
`drive unit selectively supplies, as the drive voltage, a first voltage for
`setting the display pixels to a display operation state in a bias state
`corresponding to the gradation signal, and a second voltage for setting
`the display pixels to the non-display operation state.
`
`The display apparatus according to claim 4, wherein the drive control
`unit controls the power source drive unit to supply the first voltage as the
`drive voltage in a display period in which the display pixels display the
`display data, and to supply the second voltage as the drive voltage in the
`non-display period.
`
`The display apparatus according to claim 3, further comprising:
`
`
`6P
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`3.5.1
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`
`4
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`
`5
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`Petitioner Samsung Ex. 1002 - Page 3 of 10
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`6.1
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`6.2
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`
`7
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`8P
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`8.1
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`8.2
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`8.3
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`8.4
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`9
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`10
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`a plurality of bias lines provided on the display panel along the scanning
`lines, respectively; and
`a state setting unit which eliminates a bias state set corresponding to the
`display data based on the gradation signal to the display drive circuit of
`the display pixels in each row, generates a setting signal for setting a
`specific bias state, applies the setting signal to each of the plurality of
`bias lines, and applies the setting signal to the display pixels for each
`row of the display panel.
`
`The display apparatus according to claim 6, wherein the drive control
`unit controls the state setting unit to supply the setting signal to the bias
`lines corresponding to the display pixels during a portion of the non-
`display period.
`
`The display apparatus according to claim 6, wherein each of the display
`pixels comprises:
`an electric charge accumulation circuit which holds a voltage component
`corresponding to the gradation signal;
`a supply control circuit which generates a drive current having a
`predetermined current value based on the voltage component held in the
`electric charge accumulation circuit, and which supplies the drive current
`to the optical element; and
`a writing control circuit which controls a supply state of electric charges,
`based on the gradation signal, to the electric charge accumulation circuit,
`wherein the supply control circuit includes the first switch circuit and is
`configured to supply the drive current to the optical element via the
`conduction channel, and wherein the electric charge accumulation circuit
`is connected to the control terminal of the first switch circuit.
`
`The display apparatus according to claim 8, wherein the optical element
`comprises a light emitting element which performs a light emitting
`operation at a luminance corresponding to a value of the drive current
`applied thereto.
`
`The display apparatus according to claim 9, wherein the data drive unit
`comprises a circuit which generates, as the gradation signal, a gradation
`current having a current value to cause the light emitting element to
`perform a light emitting operation with a luminance gradation
`corresponding to the display data.
`
`Petitioner Samsung Ex. 1002 - Page 4 of 10
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`

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`
`11
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`
`12.1
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`
`13P
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`13.1
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`13.2
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`14
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`The display apparatus according to claim 9, wherein the light emitting
`element comprises an organic electroluminescent element.
`
`The display apparatus according to claim 8, wherein the display panel
`includes a plurality of power source lines corresponding respectively to
`rows of the display panel, and the drive voltage is supplied to the power
`source lines, and
`12.2 wherein the first end of the conduction channel of the first switch circuit
`of each of the display pixels is connected to one of the power source
`lines.
`
`The display apparatus according to claim 12, wherein the writing control
`circuit of each of the display pixels comprises:
`a conduction channel having a first end connected with one of the data
`lines and a second end connected with the control terminal of the first
`switch circuit of the supply control circuit via the electric charge
`accumulation circuit; and
`a control terminal connected with one of the scanning lines.
`
`The display apparatus according to claim 8, wherein the display drive
`circuit further comprises a bias control circuit which discharges electric
`charges accumulated in the electric charge accumulation circuit, and
`applies one of no voltage and a reverse bias voltage to the supply control
`circuit.
`
` The display apparatus according to claim 14, wherein the bias control
`circuit comprises:
`a conduction channel having a first end connected with one of the
`scanning lines and a second end connected with the control terminal of
`the first switch circuit of the supply control circuit; and
`a control terminal connected with one of the bias lines.
`
`The display apparatus according to claim 14, wherein the display drive
`circuit comprises:
`a second switch circuit including a control terminal connected with one
`of the scanning lines, and a conduction channel having a first end to
`which the drive voltage is applied and a second end to which a control
`terminal of the first switch circuit is connected;
`
`15.2
`
`16P
`
`
`15P
`
`15.1
`
`16.1
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`Petitioner Samsung Ex. 1002 - Page 5 of 10
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`

`

`16.2
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`16.3
`
`
`17
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`18.1
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`a third switch circuit including a control terminal connected with one of
`the scanning lines, and a conduction channel having a first end to which
`one of the data lines is connected and a second end to which a
`connection contact point is connected;
`a capacitance element connected between the control terminal of the first
`switch circuit and the connection contact point; and
`16.4.1 a fourth switch circuit including a control terminal connected with one of
`the bias lines, and a conduction channel having a first end connected
`with one of the scanning lines and a second end connected with the
`control terminal of the first switch circuit,
`
`16.4.2 wherein the bias control circuit comprises the fourth switch circuit, and
`16.4.3 wherein the electric charge accumulation circuit comprises the
`capacitance element.
`
` The display apparatus according to claim 16, wherein each of the first
`through fourth switch circuits comprises an amorphous silicon thin film
`transistor.
`
`The display apparatus according to claim 4, wherein said plurality of
`image pixels of the display panel are divided into a plurality of groups
`each including a plurality of rows, and
`18.2 wherein the drive control unit controls the power source drive unit to
`supply the first voltage to the display pixels for each said group as the
`drive voltage in a display period for operating the display pixels to
`display the display data, and, within each said group, simultaneously sets
`the display pixels to a display operation state.
`
`The display apparatus according to claim 18, wherein the plurality of
`rows of each said group comprises a plurality of adjacent rows.
`
`The display apparatus according to claim 18, wherein the plurality of
`rows of each said group comprises a plurality of separated rows.
`
` The display apparatus according to claim 18, wherein the drive control
`unit controls the power source drive unit to supply the second voltage to
`the display pixels for each said group as the drive voltage in the non-
`display period, and, within each said group, simultaneously sets the
`display pixels to the non-display operation state.
`
`
`19
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`
`20
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`
`21
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`Petitioner Samsung Ex. 1002 - Page 6 of 10
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`

`
`22.1
`
`
`23P
`23.1
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`23.2
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`The display apparatus according to claim 21, wherein the display panel
`includes a plurality of power source lines corresponding respectively to
`rows of the display panel, and the drive voltage is applied via the power
`source lines,
`22.2 wherein the power source lines are divided into groups in
`correspondence to the plurality of rows of each said group, and
`22.3 wherein, within each said group, the power source drive unit commonly
`supplies the drive voltage to each of the power source lines in the group,
`and simultaneously supplies the drive voltage to the display pixels in the
`group.
`
`The display apparatus according to claim 18, further comprising:
`a plurality of bias lines provided on the display panel along the scanning
`lines, respectively; and
`a state setting unit which eliminates a bias state set corresponding to the
`display data based on the gradation signal to the display drive circuit of
`the display pixels in each row, generates a setting signal for setting a
`specific bias state, and applies the setting signal to each of the bias lines;
`23.3 wherein the plurality of bias lines are divided into groups each including
`a plurality of bias lines corresponding to the plurality of rows of each
`said group, and
`23.4 wherein, within each said group, the state setting unit supplies the setting
`signal to said plurality of bias lines in the group, and simultaneously
`supplies the setting signal to said plurality of display pixels in the group.
`
`The display apparatus according to claim 18, further comprising:
`a plurality of bias lines provided on the display panel along the scanning
`lines, respectively; and
`a state setting unit which eliminates a bias state set corresponding to the
`display data based on the gradation signal to the display drive circuit of
`the display pixels in each row, generates a setting signal for setting a
`specific bias state, and applies the setting signal to each of the bias lines;
`24.3 wherein the state setting unit sequentially supplies the setting signal to
`the plurality of bias lines corresponding to the plurality of rows of each
`said group, and, within each said group, sequentially supplies the setting
`signal to the display pixels in the plurality of rows in the group.
`
`
`
`24P
`24.1
`
`24.2
`
`
`
`Petitioner Samsung Ex. 1002 - Page 7 of 10
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`

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`25.1
`25.2
`
`25P A drive control method of controlling a display apparatus to display
`image information corresponding to display data, wherein the display
`apparatus comprises a display panel including a plurality of display
`pixels arranged thereon in vicinities of intersections of a plurality of
`scanning lines arranged in a row direction and a plurality of data lines
`arranged in a column direction, and wherein each of the plurality of
`display pixels has an optical element and a display drive circuit which
`controls an operation of the optical element, the display drive circuit
`having a first switch circuit including a control terminal and a
`conduction channel having a first end and a second end, a drive voltage
`being applied to the first end of the conduction channel, a first end of the
`optical element being connected to the second end of the conduction
`channel, and a second end of the optical element being set to a given
`potential, the method comprising:
`sequentially setting the display pixels to a selection state, row by row;
`sequentially supplying a gradation signal corresponding to the display
`data to the display pixels in each row set to the selection state;
`in a display period, supplying as the drive voltage a voltage which sets
`each of the display pixels to a display operation state, and setting the
`display drive circuit of each of the display pixels to the display operation
`state in a bias state corresponding to the gradation signal; and
`in a non-display period including a period in which the display pixels are
`set to the selection state, supplying as the drive voltage a voltage which
`sets each of the display pixels to a non-display operation state, and
`setting each of the display pixels to the non-display operation state in
`which the display data is not displayed.
`
`The drive control method according to claim 25, wherein the setting of
`each display pixel to the display operation state comprises supplying to
`the display pixel a first voltage for setting the optical element to a
`forward bias, as the drive voltage, and
`26.2 wherein the setting of each display pixel to the non-display operation
`state comprises supplying to the display pixel a second voltage for
`setting the optical element to the non-display operation state, as the drive
`voltage.
`
`The drive control method according to claim 25, wherein the setting of
`each display pixel to the non-display operation state comprises setting
`
`25.3
`
`25.4
`
`
`26.1
`
`
`27
`
`Petitioner Samsung Ex. 1002 - Page 8 of 10
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`

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`the display pixel to a specific bias state by eliminating the bias state
`corresponding to the gradation signal set in the display pixel.
`
`The drive control method according to claim 27, wherein the setting the
`display pixel to the specific bias state is performed by applying one of a
`no-voltage and a reverse bias voltage.
`
`The drive control method according to claim 27, wherein the setting the
`display pixels to the display operation state is performed by applying to
`the display drive circuit a first voltage for setting the optical element to a
`forward bias state, as the drive voltage, and by holding a voltage
`component corresponding to the gradation signal in the display drive
`circuit.
`
`The drive control method according to claim 29, wherein the setting the
`display pixels to the specific bias state is performed by discharging the
`voltage component held in the display drive circuit, and by applying and
`holding one of a no-voltage and a reverse bias voltage in the display
`drive circuit.
`
`The drive control method according to claim 29, wherein the optical
`element comprises a light emitting element which performs a light
`emitting operation at a luminance corresponding to a current value of a
`current applied thereto, and wherein the display pixels are caused to
`perform a display operation by causing the light emitting element to
`perform a light emitting operation with a luminance gradation
`corresponding to the gradation signal.
`
`The drive control method according to claim 31, wherein the light
`emitting element comprises an organic electroluminescent element.
`
`The drive control method according to claim 31, wherein the supplying
`the gradation signal to the display pixels comprises supplying to the
`display pixels a gradation current having a current value which causes
`the light emitting element to perform the light emitting operation with a
`luminance gradation corresponding to the display data.
`
`
`
`28
`
`
`29
`
`
`30
`
`
`31
`
`
`32
`
`
`33
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`
`
`Petitioner Samsung Ex. 1002 - Page 9 of 10
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`

`

`34.1
`
`
`35
`
`
`36
`
`
`37
`
`The drive control method according to claim 25, wherein said plurality
`of display pixels of the display panel are divided into a plurality of
`groups, each including a plurality of rows, and
`34.2 wherein the setting the display pixels to the display operation state
`comprises supplying to the display pixels for each said group a first
`voltage for setting the optical element to a forward bias, as the drive
`voltage, such that, within each said group, the display pixels are
`simultaneously set to the display operation state.
`
`The drive control method according to claim 34, wherein the plurality of
`rows of each said group comprises a plurality of continuous rows.
`
`The drive control method according to claim 34, wherein the plurality of
`rows of each said group comprises a plurality of separated rows.
`
`The drive control method according to claim 34, wherein the setting the
`display pixels to the non-display operation state comprises supplying to
`the display pixels for each said group a second voltage for setting the
`optical element to the non-display operation state, as the drive voltage,
`such that, within each said group, the display pixels are simultaneously
`set to the non-display operation state.
`
`The drive control method according to claim 34, wherein the setting the
`display pixels to the non-display operation state comprises eliminating
`the bias state corresponding to the gradation signal set to the display
`pixels to set the display pixels to a specific bias state.
`
`The drive control method according to claim 38, wherein the operation
`of setting the display pixels to the specific bias state comprises, within
`each said group, simultaneously setting said plurality of display pixels to
`the specific bias state.
`
`The drive control method according to claim 38, wherein the setting the
`display pixels to the specific bias state comprises, within each said
`group, sequentially setting rows of the display pixels to the specific bias
`state.
`
`
`40
`
`
`38
`
`
`39
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`
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`Petitioner Samsung Ex. 1002 - Page 10 of 10
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