Active matrix organic light emitting display (AMOLED) device
View Patent ↗The present invention relates to an active matrix OLED (Organic Light Emitting Display) device. It comprises a matrix of luminous elements associated to different color components (red, green, blue). According to the invention, the connection of the row driver and/or data driver to the luminous elements of the matrix is modified. Each output of the row driver is connected to luminous element associated to a same color component (red or green or blue).
1. Display device comprising
an active matrix containing an array of luminous elements of k different colours arranged in a plurality of n rows and a plurality of m columns, each luminous element being associated to a colour component among the k different colour components of a picture to be displayed, k being greater than 1 and the luminous elements being arranged in groups of k consecutive luminous elements each associated to a different colour component,
a first driver having outputs connected to the active matrix for selecting luminous elements belonging to the group of rows of the matrix, each output of the first driver being connected to a different part of the matrix and the parts of the matrix being selected by the first driver one after the other,
a second driver having outputs connected to the active matrix for delivering simultaneously a signal to luminous elements belonging to a same column of the matrix and selected by the first driver, said signal depending on the video information to be displayed by the selected luminous elements; and
a digital processing unit for delivering video information to the second driver and control signals to the first driver,
wherein at least one output of the first driver is connected only to luminous elements associated to a same colour component in k groups of luminous elements belonging to the group of rows of the matrix, the signal of the video information to be displayed by each of the luminous elements connected to said at least one output of the first driver being delivered by a separate output of the second driver.
2. Display device according to claim 1 , wherein the number of k luminous elements of each group belongs to one and the same row of luminous elements of the matrix.
3. Display device according to claim 1 , wherein the first driver has a predetermined first number of outputs and the second driver has a predetermined second number of outputs.
4. Display device according to claim 1 , wherein each output of the first driver is connected to all luminous elements associated to a same colour component and belonging to the number of k rows of luminous elements of the active matrix.
5. Display device according to claim 1 , wherein each output of the first driver is connected to all luminous elements associated to a same colour component and belonging to a same row of luminous elements of the matrix and each output of the second driver is connected to the number of k luminous elements of a same group of luminous elements.
6. Display device according to claim 1 , wherein two consecutive outputs of the first driver are connected to luminous elements associated to different colour components.
7. Display device according to claim 1 , wherein at least two consecutive outputs of the first driver are connected to luminous elements associated to a same colour component.
8. Display device according to claim 1 , wherein the number of k luminous elements of each group belongs to one and the same column of luminous elements of the active matrix.
9. Display device according to claim 1 , wherein the number of k outputs of the second driver are connected to luminous elements of a same column, each one of said number of k outputs being connected to luminous elements associated to a same colour component and each output of the first driver is connected to all luminous elements associated to a same colour component and belonging to a same column of luminous elements and to the number of k rows of luminous elements of the active matrix.
10. Display device according to claim 1 , wherein the video information delivered to the second driver is based on sets of reference signals, a different set of reference signals being associated to at least two different colour components and wherein the digital processing unit controls the first driver and delivers video information and reference signals to the second driver such that, each time the luminous elements connected to an output of the first driver are selected, the digital processing unit delivers to the second driver the video information of the luminous elements selected by the first driver and the set of reference signals associated to the colour component of the selected luminous elements.