Abstract: A display device having touch screen function is provided. The display device includes a display panel, a curved touch panel, a holding unit and an anti-reflection film. The holding unit is configured to hold the display panel and the touch panel such that the display panel and the touch panel face each other through an air gap. The anti-reflection film is formed on one of a surface of the display panel and a surface of the touch panel that face each other.

Abstract: It is an object of the present invention to inhibit a collapse of a color balance possibly caused due to deterioration of self-emission elements when performing a color displaying by virtue of several different colors. A self-emission display apparatus comprises: a display element section consisting of self-emission elements; a monitor element section consisting of self-emission elements of different colors formed in the same manner as the self-emission elements of the display element section; a power supply circuit which supplies driving voltages to the display element section; monitor detecting units for detecting an operating state of the monitor element section; driving voltage control units which control driving voltages in accordance with a detected operating state; and a display control section for supplying display signal to the display element section.

Abstract: In a light emitting display panel 10, a large number of light emitting display pixels 10a are arranged in a matrix pattern, and a monitoring element Ex is provided therein which can extract a voltage which corresponds to the forward voltage of EL elements E1 on the display panel. By a signal from a current consumption detection section 14 which detects current consumption in the light emitting display panel 10, a drive ratio control section 15 performs ON/OFF control of a transistor Tr3 which is connected in series to the monitoring element Ex to control current provided from a constant current circuit. Thus, progression rates of agings of the monitoring element Ex and the EL elements E1 arranged in the display panel can be controlled to roughly coincide with each other, and a power loss generated in a light emission drive transistor Tr2 in each pixel 10a can be restrained as much as possible.

Abstract: In a light emitting display device which is actively driven by TFTs, light emitting display pixels are driven efficiently. In a light emitting display panel 10, a large number of light emitting display pixels 10a are arranged in a matrix pattern and measuring pixels 10b are arranged forming a line along one dataline. A constant current is supplied from a constant current source 11 to the measuring pixels 10b, and the forward voltage VF of the EL element in the measuring pixel 10b is obtained by a voltage detecting terminal 12. The value of the drive voltage supplied to the light emitting display pixels 10a is controlled based on the forward voltage VF. Thus, a drive TFT (Tr2) constructing the light emitting display pixel 10a can drive an EL element E1 in the state where a drop voltage (VD) of the degree by which a constant current characteristic can be ensured is ensured, and a power loss generated in the drive TFT can be effectively restrained.

Abstract: Light-emitting elements disposed on a light-emitting display panel are driven by constant currents, and the forward direction voltages of the light-emitting elements are obtained by a sampling/holding circuit. Then, the voltage output from a drive voltage source composed of a DC-DC converter is controlled by the forward direction voltages obtained by the sampling/holding circuit. For example, in a case in which the light emission luminance of the light-emitting display panel is changed or in other case, a sampling and holding operation is executed by the sampling/holding circuit in response to a control signal from a sampling timing control circuit at intervals shorter than ordinary intervals. With this arrangement, when light emission luminance of a light-emitting display panel is changed, the gentle changing characteristics of the light emission luminance thereof can be improved.

Abstract: In a drive device for an active type light emitting display panel which can apply a reverse bias voltage to an EL element, in order to be able to compensate deterioration in light-emitting efficiency of the EL element accompanied by applying of the reverse bias voltage and the like, one pixel 10 is composed of a controlling TFT (Tr1), the driving TFT (Tr2), a capacitor C1, and the EL element E1. Switching switches SW1, SW2 mutually enables a supplying state of a forward current to the EL element E1 and an applying state of the reverse bias voltage to be selected. In one control form according to the present invention, when the applying state of the reverse bias voltage shifts to the supplying state of the forward current, by switching one switch first, the anode and cathode of the EL element E1 are made to the same electrical potential to allow electrical charges to be discharged.

Abstract: One pixel (10) is comprised of a controlling TFT (Tr1), a TFT (Tr3) functioning as a threshold voltage generating element, a TFT (Tr4) functioning as a reset element, a driving TFT (Tr2), a capacitor (C1) holding the gate voltage of the driving TFT, a TFT (Tr5) functioning as a current restraining means for being controlled so as to be OFF at a reset operation time, and an EL element (E1). At the reset operation time in which a terminal voltage of the capacitor (C1) is reset to a predetermined electrical potential, a current restraining means comprising the TFT (Tr5) is controlled so as to prevent excess current due to an operation of the driving TFT (Tr2) from being imparted to the EL element (E1).

Abstract: It is an object of the present invention to inhibit a collapse of a color balance possibly caused due to deterioration of self-emission elements when performing a color displaying by virtue of several different colors. A self-emission display apparatus comprises: a display element section consisting of self-emission elements; a monitor element section consisting of self-emission elements of different colors formed in the same manner as the self-emission elements of the display element section; a power supply circuit which supplies driving voltages to the display element section; monitor detecting units for detecting an operating state of the monitor element section; driving voltage control units which control driving voltages in accordance with a detected operating state; and a display control section for supplying display signal to the display element section.

Abstract: Light-emitting elements disposed on a light-emitting display panel are driven by constant currents, and the forward direction voltages of the light-emitting elements are obtained by a sampling/holding circuit. Then, the voltage output from a drive voltage source composed of a DC-DC converter is controlled by the forward direction voltages obtained by the sampling/holding circuit. For example, when the light-emitting display panel starts to be driven for light emission or when the light emission luminance of the light-emitting display panel that is being driven for light emission is to be increased, a control signal is sent from a light emission control circuit to a voltage forcibly changing circuit which supplies an output voltage increase command to the PWM circuit of the drive voltage source. With this arrangement, the rising-up property of the light-emitting display panel and the following property of luminance can be improved.

Abstract: In a light emitting display panel 10, a large number of light emitting display pixels 10a are arranged in a matrix pattern, and a monitoring element Ex is provided therein which can extract a voltage which corresponds to the forward voltage of EL elements E1 on the display panel. By a signal from a current consumption detection section 14 which detects current consumption in the light emitting display panel 10, a drive ratio control section 15 performs ON/OFF control of a transistor Tr3 which is connected in series to the monitoring element Ex to control current provided from a constant current circuit. Thus, progression rates of agings of the monitoring element Ex and the EL elements E1 arranged in the display panel can be controlled to roughly coincide with each other, and a power loss generated in a light emission drive transistor Tr2 in each pixel 10a can be restrained as much as possible.

Abstract: A voltage from a constant voltage source for a voltage of V1 is configured to be supplied to an anode line drive circuit 2. Then, a current larger than that, by which the current image is displayed, is supplied from the constant voltage source for a voltage of V1 to EL elements E11 through Enm by connecting all of drive switches Sa1 through Sam in the anode line drive circuit 2 to the side of the constant voltage source for a voltage of V1, and by connecting all of scanning switches Sk1 through Skm in a cathode-line scanning circuit 3 to the side of the ground potential GND. A leak phenomenon generated in an organic EL element can be rehabilitated, or generation of the leak phenomenon can be prevented by such a large current supplied on a regular basis.

Abstract: In an active-drive type pixel structure comprising at least TFT for control, TFT for drive, and a capacitor for charge retention, it can be easily inspected whether the functions of TFTs and the capacitor are normal or not. In an active-drive type pixel structure comprising TFT (Tr1) for control, TFT (Tr2) for drive, and a capacitor for charge retention, one terminal of a dummy load W for inspection is connected to a drain of the TFT for drive, and the other terminal of the load W is connected to a line 3 for inspection. By measuring an electric current Id obtained on the line 3 for inspection while changing a voltage supplied to a data line 2a, it can be inspected whether the functions of TFTs and the capacitor are normal or not. The dummy load W is configured to be melted and cut by burning off the load W with a laser beam or by passing a predetermined electric current in the load W after completion of inspection.

Abstract: Provided is a device for driving an active matrix type luminescent display panel, which can effectively apply a reverse bias voltage to a luminescent element via a drive TFT. A luminescent element 14 constituting one pixel 10 is light-up driven by a control TFT 11 and a drive TFT 12. A serial circuit of the drive TFT 12 and the luminescent element 14 is connected to a power source circuit via a switch S1 and a switch S2, whereby a state where a forward-directional current is supplied to the luminescent element or a state where a reverse bias voltage is applied to the luminescent element is selected. By using, as the control TFT 11 and the drive TFT 12, TFT of the channel type of that is the same, it is possible to maintain the drive TFT 12 to be in an “on” state when having applied a reverse bias voltage to the luminescent element 14. By doing so, it becomes possible to effectively apply a reverse bias voltage to the luminescent element.

Abstract: In the case where time gradation is implemented, there is provided a drive method for a passive drive type light emitting display panel by which an excellent gradation expression can be realized without subdividing intensity resolution so much. Provided is an intensity increase period in which the light emission intensity of a light emitting element is gradually increased allowing the light emission intensity to reach a constant intensity state within a predetermined period from a scan start in one scan period or an intensity decrease period in which the light emission intensity of the light emitting element is gradually decreased from the constant intensity state within a predetermined period which is immediately before the completion of the scan period.

Abstract: In an active-drive type pixel structure comprising at least TFT for control, TFT for drive, and a capacitor for charge retention, it can be easily inspected whether the functions of TFTs and the capacitor are normal or not. In an active-drive type pixel structure comprising TFT (Tr1) for control, TFT (Tr2) for drive, and a capacitor for charge retention, one terminal of a dummy load W for inspection is connected to a drain of the TFT for drive, and the other terminal of the load W is connected to a line 3 for inspection. By measuring an electric current Id obtained on the line 3 for inspection while changing a voltage supplied to a data line 2a, it can be inspected whether the functions of TFTs and the capacitor are normal or not. The dummy load W is configured to be melted and cut by burning off the load W with a laser beam or by passing a predetermined electric current in the load W after completion of inspection.

Abstract: In a light emitting display device which is actively driven by TFTs, light emitting display pixels are driven efficiently. In a light emitting display panel 10, a large number of light emitting display pixels 10a are arranged in a matrix pattern and measuring pixels 10b are arranged forming a line along one dataline. A constant current is supplied from a constant current source 11 to the measuring pixels 10b, and the forward voltage VF of the EL element in the measuring pixel 10b is obtained by a voltage detecting terminal 12. The value of the drive voltage supplied to the light emitting display pixels 10a is controlled based on the forward voltage VF. Thus, a drive TFT (Tr2) constructing the light emitting display pixel 10a can drive an EL element E1 in the state where a drop voltage (VD) of the degree by which a constant current characteristic can be ensured is ensured, and a power loss generated in the drive TFT can be effectively restrained.

Abstract: In a drive unit for a luminescence display panel employing organic EL elements as light-emitting elements and capable of reducing power consumed by the display panel when a partial scan mode is selected, when the partial scan mode is selected by a scan mode switching mean, a control is performed so that the ratio of a drive period (D3), during which the light emission of the light-emitting elements is controlled, to a reset period (R1) set by a reset control means is increased as compared with a case in which the ordinary scan mode is selected. Thus, the momentary luminance of the light-emitting elements can be lowered by further reducing drive currents or drive voltages supplied to the respective light-emitting elements. Accordingly, it is possible to further reduce the power consumption of the luminescence display panel as well as to prevent the deterioration of the light-emitting elements, which contributes to extend the life of the light-emitting elements.

Abstract: In a drive device for an active type light emitting display panel which can apply a reverse bias voltage to an EL element, in order to be able to compensate deterioration in light-emitting efficiency of the EL element accompanied by applying of the reverse bias voltage and the like, one pixel 10 is composed of a controlling TFT (Tr1), the driving TFT (Tr2), a capacitor C1, and the EL element E1. Switching switches SW1, SW2 mutually enables a supplying state of a forward current to the EL element E1 and an applying state of the reverse bias voltage to be selected. In one control form according to the present invention, when the applying state of the reverse bias voltage shifts to the supplying state of the forward current, by switching one switch first, the anode and cathode of the EL element E1 are made to the same electrical potential to allow electrical charges to be discharged.

Abstract: In order to restrain excess current from flowing in a light emitting element via a driving TFT in a reset period in an active type light emitting display device provided with a pixel structure in which a threshold voltage compensation technique is utilized. One pixel 10 is comprised of a controlling TFT (Tr1), a TFT (Tr3) functioning as a threshold voltage generating element, a TFT (Tr4) functioning as a reset element, a driving TFT (Tr2), a capacitor C1 holding the gate voltage of the driving TFT, a TFT (Tr5) functioning as a current restraining means for being controlled so as to be OFF at a reset operation time, and an EL element E1. At the reset operation time in which a terminal voltage of the capacitor C1 is reset to a predetermined electrical potential, the TFT (Tr5) is controlled so as to be in an OFF state, operating so as to prevent excess current due to an operation of the driving TFT (Tr2) from being imparted to the EL element E1.

Abstract: Provided is a device for driving an active matrix type luminescent display panel, which can effectively apply a reverse bias voltage to a luminescent element via a drive TFT. A luminescent element 14 constituting one pixel 10 is light-up driven by a control TFT 11 and a drive TFT 12. A serial circuit of the drive TFT 12 and the luminescent element 14 is connected to a power source circuit via a switch S1 and a switch S2, whereby a state where a forward-directional current is supplied to the luminescent element or a state where a reverse bias voltage is applied to the luminescent element is selected. By using, as the control TFT 11 and the drive TFT 12, TFT of the channel type of that is the same, it is possible to maintain the drive TFT 12 to be in an “on” state when having applied a reverse bias voltage to the luminescent element 14. By doing so, it becomes possible to effectively apply a reverse bias voltage to the luminescent element.